Optical image capturing system

1. Technical Field

The present invention generally relates to an optical system, and more particularly to a compact optical image capturing system for an electronic device.

2. Description of Related Art

In recent years, with the rise of portable electronic devices having camera functionalities, the demand for an optical image capturing system is raised gradually. The image sensing device of the ordinary photographing camera is commonly selected from charge coupled device (CCD) or complementary metal-oxide semiconductor sensor (CMOS Sensor). Also, as advanced semiconductor manufacturing technology enables the minimization of the pixel size of the image sensing device, the development of the optical image capturing system towards the field of high pixels. Therefore, the requirement for high imaging quality is rapidly raised.

The conventional optical system of the portable electronic device usually has three or four lenses. However, the optical system is asked to take pictures in a dark environment, in other words, the optical system is asked to have a large aperture. The conventional optical system provides high optical performance as required.

It is an important issue to increase the quantity of light entering the lens. Also, the modern lens is also asked to have several characters, including high image quality.

The aspect of embodiment of the present disclosure directs to an optical image capturing system and an optical image capturing lens which use combination of refractive powers, convex and concave surfaces of five-piece optical lenses (the convex or concave surface in the disclosure denotes the geometrical shape of an image-side surface or an object-side surface of each lens on an optical axis) to increase the quantity of incoming light of the optical image capturing system, and to improve imaging quality for image formation, so as to be applied to minimized electronic products.

The term and its definition to the lens parameter in the embodiment of the present are shown as below for further reference.

The lens parameter related to a length or a height in the lens:

A height for image formation of the optical image capturing system is denoted by HOI. A height of the optical image capturing system is denoted by HOS. A distance from the object-side surface of the first lens to the image-side surface of the fifth lens is denoted by InTL. A distance from the first lens to the second lens is denoted by IN 12 (instance). A central thickness of the first lens of the optical image capturing system on the optical axis is denoted by TP 1 (instance).

The lens parameter related to a material in the lens:

An Abbe number of the first lens in the optical image capturing system is denoted by NA 1 (instance). A refractive index of the first lens is denoted by Nd 1 (instance).

The lens parameter related to a view angle of the lens:

A view angle is denoted by AF. Half of the view angle is denoted by HAF. A major light angle is denoted by MRA.

The lens parameter related to exit/entrance pupil in the lens:

An entrance pupil diameter of the optical image capturing system is denoted by HEP. For any surface of any lens, a maximum effective half diameter (EHD) is a perpendicular distance between an optical axis and a crossing point on the surface where the incident light with a maximum viewing angle of the system passing the very edge of the entrance pupil. For example, the maximum effective half diameter of the object-side surface of the first lens is denoted by EHD 11 , the maximum effective half diameter of the image-side surface of the first lens is denoted by EHD 12 , the maximum effective half diameter of the object-side surface of the second lens is denoted by EHD 21 , the maximum effective half diameter of the image-side surface of the second lens is denoted by EHD 22 , and so on.

The lens parameter related to a depth of the lens shape:

A distance in parallel with the optical axis from a point where the optical axis passes through to an end point of the maximum effective semi diameter on the object-side surface of the fifth lens is denoted by InRS 51 (the depth of the maximum effective semi diameter). A distance in parallel with the optical axis from a point where the optical axis passes through to an end point of the maximum effective semi diameter on the image-side surface of the fifth lens is denoted by InRS 52 (the depth of the maximum effective semi diameter). The depth of the maximum effective semi diameter (sinkage) on the object-side surface or the image-side surface of any other lens is denoted in the same manner.

The lens parameter related to the lens shape:

A critical point C is a tangent point on a surface of a specific lens, and the tangent point is tangent to a plane perpendicular to the optical axis and the tangent point cannot be a crossover point on the optical axis. To follow the past, a distance perpendicular to the optical axis between a critical point C 41 on the object-side surface of the fourth lens and the optical axis is HVT 41 (instance), and a distance perpendicular to the optical axis between a critical point C 42 on the image-side surface of the fourth lens and the optical axis is HVT 42 (instance). A distance perpendicular to the optical axis between a critical point C 51 on the object-side surface of the fifth lens and the optical axis is HVT 51 (instance), and a distance perpendicular to the optical axis between a critical point C 52 on the image-side surface of the fifth lens and the optical axis is HVT 52 (instance). A distance perpendicular to the optical axis between a critical point on the object-side or image-side surface of other lenses the optical axis is denoted in the same manner.

The object-side surface of the fifth lens has one inflection point IF 511 which is nearest to the optical axis, and the sinkage value of the inflection point IF 511 is denoted by SGI 511 (instance). A distance perpendicular to the optical axis between the inflection point IF 511 and the optical axis is HIF 511 (instance). The image-side surface of the fifth lens has one inflection point IF 521 which is nearest to the optical axis, and the sinkage value of the inflection point IF 521 is denoted by SGI 521 (instance). A distance perpendicular to the optical axis between the inflection point IF 521 and the optical axis is HIF 521 (instance).

The object-side surface of the fifth lens has one inflection point IF 512 which is the second nearest to the optical axis, and the sinkage value of the inflection point IF 512 is denoted by SGI 512 (instance). A distance perpendicular to the optical axis between the inflection point IF 512 and the optical axis is HIF 512 (instance). The image-side surface of the fifth lens has one inflection point IF 522 which is the second nearest to the optical axis, and the sinkage value of the inflection point IF 522 is denoted by SGI 522 (instance). A distance perpendicular to the optical axis between the inflection point IF 522 and the optical axis is HIF 522 (instance).

The object-side surface of the fifth lens has one inflection point IF 513 which is the third nearest to the optical axis, and the sinkage value of the inflection point IF 513 is denoted by SGI 513 (instance). A distance perpendicular to the optical axis between the inflection point IF 513 and the optical axis is HIF 513 (instance). The image-side surface of the fifth lens has one inflection point IF 523 which is the third nearest to the optical axis, and the sinkage value of the inflection point IF 523 is denoted by SGI 523 (instance). A distance perpendicular to the optical axis between the inflection point IF 523 and the optical axis is HIF 523 (instance).

The object-side surface of the fifth lens has one inflection point IF 514 which is the fourth nearest to the optical axis, and the sinkage value of the inflection point IF 514 is denoted by SGI 514 (instance). A distance perpendicular to the optical axis between the inflection point IF 514 and the optical axis is HIF 514 (instance). The image-side surface of the fifth lens has one inflection point IF 524 which is the fourth nearest to the optical axis, and the sinkage value of the inflection point IF 524 is denoted by SGI 524 (instance). A distance perpendicular to the optical axis between the inflection point IF 524 and the optical axis is HIF 524 (instance).

An inflection point, a distance perpendicular to the optical axis between the inflection point and the optical axis, and a sinkage value thereof on the object-side surface or image-side surface of other lenses is denoted in the same manner.

The lens parameter related to an aberration:

Optical distortion for image formation in the optical image capturing system is denoted by ODT. TV distortion for image formation in the optical image capturing system is denoted by TDT. Further, the range of the aberration offset for the view of image formation may be limited to 50%-100% field. An offset of the spherical aberration is denoted by DFS. An offset of the coma aberration is denoted by DFC.

A modulation transfer function (MTF) graph of an optical image capturing system is used to test and evaluate the contrast and sharpness of the generated images. The vertical axis of the coordinate system of the MTF graph represents the contrast transfer rate, of which the value is between 0 and 1, and the horizontal axis of the coordinate system represents the spatial frequency, of which the unit is cycles/mm or Ip/mm, i.e., line pairs per millimeter. Theoretically, a perfect optical image capturing system can present all detailed contrast and every line of an object in an image. However, the contrast transfer rate of a practical optical image capturing system along a vertical axis thereof would be less than 1. In addition, peripheral areas in an image would have a poorer realistic effect than a center area thereof has. For visible spectrum, the values of MTF in the spatial frequency of 55 cycles/mm at the optical axis, 0.3 field of view, and 0.7 field of view on an image plane are respectively denoted by MTFE 0 , MTFE 3 , and MTFE 7 ; the values of MTF in the spatial frequency of 110 cycles/mm at the optical axis, 0.3 field of view, and 0.7 field of view on an image plane are respectively denoted by MTFQ 0 , MTFQ 3 , and MTFQ 7 ; the values of MTF in the spatial frequency of 220 cycles/mm at the optical axis, 0.3 field of view, and 0.7 field of view on an image plane are respectively denoted by MTFH 0 , MTFH 3 , and MTFH 7 ; the values of MTF in the spatial frequency of 440 cycles/mm at the optical axis, 0.3 field of view, and 0.7 field of view on the image plane are respectively denoted by MTF 0 , MTF 3 , and MTF 7 . The three aforementioned fields of view respectively represent the center, the inner field of view, and the outer field of view of a lens, and, therefore, can be used to evaluate the performance of an optical image capturing system. If the optical image capturing system provided in the present invention corresponds to photosensitive components which provide pixels having a size no large than 1.12 micrometer, a quarter of the spatial frequency, a half of the spatial frequency (half frequency), and the full spatial frequency (full frequency) of the MTF diagram are respectively at least 110 cycles/mm, 220 cycles/mm and 440 cycles/mm.

If an optical image capturing system is required to be able also to image for infrared spectrum, e.g., to be used in low-light environments, then the optical image capturing system should be workable in wavelengths of 850 nm or 800 nm. Since the main function for an optical image capturing system used in low-light environment is to distinguish the shape of objects by light and shade, which does not require high resolution, it is appropriate to only use spatial frequency less than 110 cycles/mm for evaluating the performance of optical image capturing system in the infrared spectrum. When the aforementioned wavelength of 850 nm focuses on the image plane, the contrast transfer rates (i.e., the values of MTF) in spatial frequency of 55 cycles/mm at the optical axis, 0.3 field of view, and 0.7 field of view on an image plane are respectively denoted by MTFI 0 , MTFI 3 , and MTFI 7 . However, infrared wavelengths of 850 nm or 800 nm are far away from the wavelengths of visible light; it would be difficult to design an optical image capturing system capable of focusing visible and infrared light (i.e., dual-mode) at the same time and achieving certain performance.

The present invention provides an optical image capturing system, which is capable of focusing visible and infrared light (i.e., dual-mode) at the same time and achieving certain performance, wherein the fifth lens thereof is provided with an inflection point at the object-side surface or at the image-side surface to adjust the incident angle of each view field and modify the ODT and the TDT. In addition, the surfaces of the fifth lens are capable of modifying the optical path to improve the imaging quality.

The optical image capturing system of the present invention includes a first lens, a second lens, a third lens, a fourth lens, a fifth lens, and an image plane in order along an optical axis from an object side to an image side. The first lens has refractive power. Both the object-side surface and the image-side surface of the fifth lens are aspheric surfaces. The optical image capturing system satisfies:

1.2 ≦f /HEP≦6.0; 0.5≦HOS/ f≦ 3; and 0.5≦SETP/STP<1;

where f is a focal length of the optical image capturing system; HEP is an entrance pupil diameter of the optical image capturing system; HOS is a distance in parallel with the optical axis between an object-side surface, which face the object side, of the first lens and the image plane; ETP 1 , ETP 2 , ETP 3 , ETP 4 , and ETP 5 are respectively a thickness in parallel with the optical axis at a height of ½ HEP of the first lens to the fifth lens, wherein SETP is a sum of the aforementioned ETP 1 to ETP 5 ; TP 1 , TP 2 , TP 3 , TP 4 , and TP 5 are respectively a thickness at the optical axis of the first lens to the fifth lens, wherein STP is a sum of the aforementioned TP 1 to TP 5 .

The present invention further provides an optical image capturing system, including a first lens, a second lens, a third lens, a fourth lens, a fifth lens, and an image plane in order along an optical axis from an object side to an image side. The first lens has negative refractive power, wherein the object-side surface thereof can be convex near the optical axis. The second lens has refractive power. The third lens has refractive power. The fourth lens has refractive power. The fifth lens has refractive power. The object-side surface and image-side surface of at least one lens among the first lens to the fifth lens are both aspheric surfaces. At least one lens among the first lens to the fifth lens respectively have at least an inflection point on at least a surface thereof. At least one lens between the second lens and the fifth lens has positive refractive power. The optical image capturing system satisfies:

1.2 ≦f /HEP≦6.0; 0.5≦HOS/ f≦ 3.0; 0.2≦EIN/ETL<1;

where f is a focal length of the optical image capturing system; HEP is an entrance pupil diameter of the optical image capturing system; HOS is a distance in parallel with the optical axis between an object-side surface, which face the object side, of the first lens and the image plane; ETL is a distance in parallel with the optical axis between a coordinate point at a height of ½ HEP on the object-side surface of the first lens and the image plane; EIN is a distance in parallel with the optical axis between the coordinate point at the height of ½ HEP on the object-side surface of the first lens and a coordinate point at a height of ½ HEP on the image-side surface of the fifth lens.

The present invention further provides an optical image capturing system, including a first lens, a second lens, a third lens, a fourth lens, a fifth lens, and an image plane, in order along an optical axis from an object side to an image side. The number of the lenses having refractive power in the optical image capturing system is five. At least one lens among the first to the fifth lenses have at least an inflection point on at least one surface thereof. The first lens has negative refractive power, and the second lens has refractive power. The third lens has positive refractive power. The fourth lens has refractive power. The fifth lens has refractive power. The object-side surface and the image-side surface of at least one lens among the first lens to the fifth lens are both aspheric surfaces. The optical image capturing system satisfies:

1.2 ≦f /HEP≦3.0; 0.5≦HOS/ f≦ 3.0; 0.2≦EIN/ETL<1;

where f is a focal length of the optical image capturing system; HEP is an entrance pupil diameter of the optical image capturing system; HOS is a distance in parallel with the optical axis between an object-side surface, which face the object side, of the first lens and the image plane; ETL is a distance in parallel with the optical axis between a coordinate point at a height of ½ HEP on the object-side surface of the first lens and the image plane; EIN is a distance in parallel with the optical axis between the coordinate point at the height of ½ HEP on the object-side surface of the first lens and a coordinate point at a height of ½ HEP on the image-side surface of the fifth lens.

For any lens, the thickness at the height of a half of the entrance pupil diameter (HEP) particularly affects the ability of correcting aberration and differences between optical paths of light in different fields of view of the common region of each field of view of light within the covered range at the height of a half of the entrance pupil diameter (HEP). With greater thickness, the ability to correct aberration is better. However, the difficulty of manufacturing increases as well. Therefore, the thickness at the height of a half of the entrance pupil diameter (HEP) of any lens has to be controlled. The ratio between the thickness (ETP) at the height of a half of the entrance pupil diameter (HEP) and the thickness (TP) of any lens on the optical axis (i.e., ETP/TP) has to be particularly controlled. For example, the thickness at the height of a half of the entrance pupil diameter (HEP) of the first lens is denoted by ETP 1 , the thickness at the height of a half of the entrance pupil diameter (HEP) of the second lens is denoted by ETP 2 , and the thickness at the height of a half of the entrance pupil diameter (HEP) of any other lens in the optical image capturing system is denoted in the same manner. The optical image capturing system of the present invention satisfies:

0.3≦SETP/EIN<1;

where SETP is the sum of the aforementioned ETP 1 to ETP 5 .

In order to enhance the ability of correcting aberration and to lower the difficulty of manufacturing at the same time, the ratio between the thickness (ETP) at the height of a half of the entrance pupil diameter (HEP) and the thickness (TP) of any lens on the optical axis (i.e., ETP/TP) has to be particularly controlled. For example, the thickness at the height of a half of the entrance pupil diameter (HEP) of the first lens is denoted by ETP 1 , the thickness of the first lens on the optical axis is TP 1 , and the ratio between these two parameters is ETP 1 /TP 1 ; the thickness at the height of a half of the entrance pupil diameter (HEP) of the first lens is denoted by ETP 2 , the thickness of the second lens on the optical axis is TP 2 , and the ratio between these two parameters is ETP 2 /TP 2 . The ratio between the thickness at the height of a half of the entrance pupil diameter (HEP) and the thickness of any other lens in the optical image capturing system is denoted in the same manner. The optical image capturing system of the present invention satisfies:

0.2≦ETP/TP≦3.

The horizontal distance between two neighboring lenses at the height of a half of the entrance pupil diameter (HEP) is denoted by ED, wherein the aforementioned horizontal distance (ED) is parallel to the optical axis of the optical image capturing system, and particularly affects the ability of correcting aberration and differences between optical paths of light in different fields of view of the common region of each field of view of light at the height of a half of the entrance pupil diameter (HEP). With longer distance, the ability to correct aberration is potential to be better. However, the difficulty of manufacturing increases, and the feasibility of “slightly shorten” the length of the optical image capturing system is limited as well. Therefore, the horizontal distance (ED) between two specific neighboring lenses at the height of a half of the entrance pupil diameter (HEP) has to be controlled.

In order to enhance the ability of correcting aberration and to lower the difficulty of “slightly shorten” the length of the optical image capturing system at the same time, the ratio between the horizontal distance (ED) between two neighboring lenses at the height of a half of the entrance pupil diameter (HEP) and the parallel distance (IN) between these two neighboring lens on the optical axis (i.e., ED/IN) has to be particularly controlled. For example, the horizontal distance between the first lens and the second lens at the height of a half of the entrance pupil diameter (HEP) is denoted by ED 12 , the horizontal distance between the first lens and the second lens on the optical axis is denoted by IN 12 , and the ratio between these two parameters is ED 12 /IN 12 ; the horizontal distance between the second lens and the third lens at the height of a half of the entrance pupil diameter (HEP) is denoted by ED 23 , the horizontal distance between the second lens and the third lens on the optical axis is denoted by IN 23 , and the ratio between these two parameters is ED 23 /IN 23 . The ratio between the horizontal distance between any two neighboring lenses at the height of a half of the entrance pupil diameter (HEP) and the horizontal distance between these two neighboring lenses on the optical axis is denoted in the same manner.

The horizontal distance in parallel with the optical axis between a coordinate point at the height of ½ HEP on the image-side surface of the fifth lens and image surface is denoted by EBL. The horizontal distance in parallel with the optical axis between the point on the image-side surface of the fifth lens where the optical axis passes through and the image plane is denoted by BL. To enhance the ability to correct aberration and to preserve more space for other optical components, the optical image capturing system of the present invention can satisfy 0.2≦EBL/BL≦1. The optical image capturing system can further include a filtering component, which is provided between the fifth lens and the image plane, wherein the horizontal distance in parallel with the optical axis between the coordinate point at the height of ½ HEP on the image-side surface of the fifth lens and the filtering component is denoted by EIR, and the horizontal distance in parallel with the optical axis between the point on the image-side surface of the fifth lens where the optical axis passes through and the filtering component is denoted by PIR. The optical image capturing system of the present invention can satisfy 0.1≦EIR/PIR≦1.

In an embodiment, a height of the optical image capturing system (HOS) can be reduced while |f 1 |>f 5 .

In an embodiment, when the lenses satisfy f 2 |+|f 3 |+|f 4 | and |f 1 |+|f 5 |, at least one lens among the second to the fourth lenses could have weak positive refractive power or weak negative refractive power. Herein the weak refractive power means the absolute value of the focal length of one specific lens is greater than 10. When at least one lens among the second to the fourth lenses has weak positive refractive power, it may share the positive refractive power of the first lens, and on the contrary, when at least one lens among the second to the fourth lenses has weak negative refractive power, it may fine tune and correct the aberration of the system.

In an embodiment, the fifth lens could have negative refractive power, and an image-side surface thereof is concave, it may reduce back focal length and size. Besides, the fifth lens can have at least an inflection point on at least a surface thereof, which may reduce an incident angle of the light of an off-axis field of view and correct the aberration of the off-axis field of view.

The present invention will be best understood by referring to the following detailed description of some illustrative embodiments in conjunction with the accompanying drawings, in which

FIG. 1A is a schematic diagram of a first embodiment of the present invention;

FIG. 1B shows curve diagrams of longitudinal spherical aberration, astigmatic field, and optical distortion of the optical image capturing system in the order from left to right of the first embodiment of the present application;

FIG. 1C shows a feature map of modulation transformation of the optical image capturing system of the first embodiment of the present application in visible spectrum;

FIG. 1D shows a feature map of modulation transformation of the optical image capturing system of the first embodiment of the present application in infrared spectrum;

FIG. 2A is a schematic diagram of a second embodiment of the present invention;

FIG. 2B shows curve diagrams of longitudinal spherical aberration, astigmatic field, and optical distortion of the optical image capturing system in the order from left to right of the second embodiment of the present application;

FIG. 2C shows a feature map of modulation transformation of the optical image capturing system of the second embodiment of the present application in visible spectrum;

FIG. 2D shows a feature map of modulation transformation of the optical image capturing system of the second embodiment of the present application in infrared spectrum;

FIG. 3A is a schematic diagram of a third embodiment of the present invention;

FIG. 3B shows curve diagrams of longitudinal spherical aberration, astigmatic field, and optical distortion of the optical image capturing system in the order from left to right of the third embodiment of the present application;

FIG. 3C shows a feature map of modulation transformation of the optical image capturing system of the third embodiment of the present application in visible spectrum;

FIG. 3D shows a feature map of modulation transformation of the optical image capturing system of the third embodiment of the present application in infrared spectrum;

FIG. 4A is a schematic diagram of a fourth embodiment of the present invention;

FIG. 4B shows curve diagrams of longitudinal spherical aberration, astigmatic field, and optical distortion of the optical image capturing system in the order from left to right of the fourth embodiment of the present application;

FIG. 4C shows a feature map of modulation transformation of the optical image capturing system of the fourth embodiment in visible spectrum;

FIG. 4D shows a feature map of modulation transformation of the optical image capturing system of the fourth embodiment in infrared spectrum;

FIG. 5A is a schematic diagram of a fifth embodiment of the present invention;

FIG. 5B shows curve diagrams of longitudinal spherical aberration, astigmatic field, and optical distortion of the optical image capturing system in the order from left to right of the fifth embodiment of the present application;

FIG. 5C shows a feature map of modulation transformation of the optical image capturing system of the fifth embodiment of the present application in visible spectrum;

FIG. 5D shows a feature map of modulation transformation of the optical image capturing system of the fifth embodiment of the present application in infrared spectrum;

FIG. 6A is a schematic diagram of a sixth embodiment of the present invention;

FIG. 6B shows curve diagrams of longitudinal spherical aberration, astigmatic field, and optical distortion of the optical image capturing system in the order from left to right of the sixth embodiment of the present application;

FIG. 6C shows a feature map of modulation transformation of the optical image capturing system of the sixth embodiment of the present application in visible spectrum; and

FIG. 6D shows a feature map of modulation transformation of the optical image capturing system of the sixth embodiment of the present application in infrared spectrum.

An optical image capturing system of the present invention includes a first lens, a second lens, a third lens, a fourth lens, a fifth lens, and an image plane from an object side to an image side. The optical image capturing system further is provided with an image sensor at an image plane.

The optical image capturing system can work in three wavelengths, including 486.1 nm, 587.5 nm, and 656.2 nm, wherein 587.5 nm is the main reference wavelength and is the reference wavelength for obtaining the technical characters. The optical image capturing system can also work in five wavelengths, including 470 nm, 510 nm, 555 nm, 610 nm, and 650 nm wherein 555 nm is the main reference wavelength, and is the reference wavelength for obtaining the technical characters.

The optical image capturing system of the present invention satisfies 0.5≦ΣPPR/|ΣNPR|≦3.0, and a preferable range is 1≦ΣPPR/|ΣNPR|≦2.5, where PPR is a ratio of the focal length f of the optical image capturing system to a focal length fp of each of lenses with positive refractive power; NPR is a ratio of the focal length f of the optical image capturing system to a focal length fn of each of lenses with negative refractive power; ΣPPR is a sum of the PPRs of each positive lens; and ΣNPR is a sum of the NPRs of each negative lens. It is helpful for control of an entire refractive power and an entire length of the optical image capturing system.

The image sensor is provided on the image plane. The optical image capturing system of the present invention satisfies HOS/HOI≦25 and 0.5≦HOS/f≦25, and a preferable range is 1≦HOS/HOI≦20 and 1HOS/f≦20, where HOI is a half of a diagonal of an effective sensing area of the image sensor, i.e., the maximum image height, and HOS is a height of the optical image capturing system, i.e. a distance on the optical axis between the object-side surface of the first lens and the image plane. It is helpful for reduction of the size of the system for used in compact cameras.

The optical image capturing system of the present invention further is provided with an aperture to increase image quality.

In the optical image capturing system of the present invention, the aperture could be a front aperture or a middle aperture, wherein the front aperture is provided between the object and the first lens, and the middle is provided between the first lens and the image plane. The front aperture provides a long distance between an exit pupil of the system and the image plane, which allows more elements to be installed. The middle could enlarge a view angle of view of the system and increase the efficiency of the image sensor. The optical image capturing system satisfies 0.2≦InS/HOS≦1.1, where InS is a distance between the aperture and the image plane. It is helpful for size reduction and wide angle.

The optical image capturing system of the present invention satisfies 0.1≦ΣTP/InTL≦0.9, where InTL is a distance between the object-side surface of the first lens and the image-side surface of the fifth lens, and ΣTP is a sum of central thicknesses of the lenses on the optical axis. It is helpful for the contrast of image and yield rate of manufacture and provides a suitable back focal length for installation of other elements.

The optical image capturing system of the present invention satisfies 0.01<|R 1 /R 2 |<100, and a preferable range is 0.05<|R 1 /R 2 |<80, where R 1 is a radius of curvature of the object-side surface of the first lens, and R 2 is a radius of curvature of the image-side surface of the first lens. It provides the first lens with a suitable positive refractive power to reduce the increase rate of the spherical aberration.

The optical image capturing system of the present invention satisfies −50<(R 9 −R 10 )/(R 9 +R 10 )<50, where R 9 is a radius of curvature of the object-side surface of the fifth lens, and R 10 is a radius of curvature of the image-side surface of the fifth lens. It may modify the astigmatic field curvature.

The optical image capturing system of the present invention satisfies IN 12 /f≦5.0, where IN 12 is a distance on the optical axis between the first lens and the second lens. It may correct chromatic aberration and improve the performance.

The optical image capturing system of the present invention satisfies IN 45 /f≦5.0, where IN 45 is a distance on the optical axis between the fourth lens and the fifth lens. It may correct chromatic aberration and improve the performance.

The optical image capturing system of the present invention satisfies 0.1≦(TP 1 +IN 12 )/TP 2 ≦50.0, where TP 1 is a central thickness of the first lens on the optical axis, and TP 2 is a central thickness of the second lens on the optical axis. It may control the sensitivity of manufacture of the system and improve the performance.

The optical image capturing system of the present invention satisfies 0.1≦(TP 5 +IN 45 )/TP 4 ≦50.0, where TP 4 is a central thickness of the fourth lens on the optical axis, TP 5 is a central thickness of the fifth lens on the optical axis, and IN 45 is a distance between the fourth lens and the fifth lens. It may control the sensitivity of manufacture of the system and improve the performance.

The optical image capturing system of the present invention satisfies 0.1≦TP 3 /(IN 23 +TP 3 +IN 34 )<1, where TP 2 is a central thickness of the second lens on the optical axis, TP 3 is a central thickness of the third lens on the optical axis, TP 4 is a central thickness of the fourth lens on the optical axis, IN 23 is a distance on the optical axis between the second lens and the third lens, IN 34 is a distance on the optical axis between the third lens and the fourth lens, and InTL is a distance between the object-side surface of the first lens and the image-side surface of the fifth lens. It may fine tune and correct the aberration of the incident rays layer by layer, and reduce the height of the system.

The optical image capturing system satisfies 0 mm≦HVT 51 ≦3 mm; 0 mm<HVT 52 ≦6 mm; 0≦HVT 51 /HVT 52 ; 0 mm≦|SGC 51 |≦0.5 mm; 0 mm<|SGC 52 |≦2 mm; 0<|SGC 52 |/(|SGC 52 |+TP 5 )≦0.9, where HVT 51 a distance perpendicular to the optical axis between the critical point C 51 on the object-side surface of the fifth lens and the optical axis; HVT 52 a distance perpendicular to the optical axis between the critical point C 52 on the image-side surface of the fifth lens and the optical axis; SGC 51 is a distance in parallel with the optical axis between an point on the object-side surface of the fifth lens where the optical axis passes through and the critical point C 51 ; SGC 52 is a distance in parallel with the optical axis between an point on the image-side surface of the fifth lens where the optical axis passes through and the critical point C 52 . It is helpful to correct the off-axis view field aberration.

The optical image capturing system satisfies 0.2≦HVT 52 /HOI≦0.9, and preferably satisfies 0.3≦HVT 52 /HOI≦0.8. It may help to correct the peripheral aberration.

The optical image capturing system satisfies 0≦HVT 52 /HOS≦0.5, and preferably satisfies 0.2≦HVT 52 /HOS≦0.45. It may help to correct the peripheral aberration.

The optical image capturing system of the present invention satisfies 0<SGI 511 /(SGI 511 +TP 5 )≦0.9; 0<SGI 521 /(SGI 521 +TP 5 )≦0.9, and it is preferable to satisfy 0.1≦SGI 511 /(SGI 511 +TP 5 )≦0.6; 0.1≦SGI 521 /(SGI 521 +TP 5 )≦0.6, where SGI 511 is a displacement in parallel with the optical axis, from a point on the object-side surface of the fifth lens, through which the optical axis passes, to the inflection point on the object-side surface, which is the closest to the optical axis, and SGI 521 is a displacement in parallel with the optical axis, from a point on the image-side surface of the fifth lens, through which the optical axis passes, to the inflection point on the image-side surface, which is the closest to the optical axis.

The optical image capturing system of the present invention satisfies 0<SGI 512 /(SGI 512 +TP 5 )≦0.9; 0<SGI 522 /(SGI 522 +TP 5 )≦0.9, and it is preferable to satisfy 0.1≦SGI 512 /(SGI 512 +TP 5 )≦0.6; 0.1≦SGI 522 /(SGI 522 +TP 5 )≦0.6, where SGI 512 is a displacement in parallel with the optical axis, from a point on the object-side surface of the fifth lens, through which the optical axis passes, to the inflection point on the object-side surface, which is the second closest to the optical axis, and SGI 522 is a displacement in parallel with the optical axis, from a point on the image-side surface of the fifth lens, through which the optical axis passes, to the inflection point on the image-side surface, which is the second closest to the optical axis.

The optical image capturing system of the present invention satisfies 0.001 mm≦|HIF 511 |≦5 mm; 0.001 mm≦|HIF 521 |≦5 mm, and it is preferable to satisfy 0.1 mm≦|HIF 511 |≦3.5 mm, 1.5 mm≦|HIF 521 |≦3.5 mm, where HIF 511 is a distance perpendicular to the optical axis between the inflection point on the object-side surface of the fifth lens, which is the closest to the optical axis, and the optical axis; HIF 521 is a distance perpendicular to the optical axis between the inflection point on the image-side surface of the fifth lens, which is the closest to the optical axis, and the optical axis.

The optical image capturing system of the present invention satisfies 0.001 mm≦|HIF 512 |≦5 mm; 0.001 mm≦|HIF 522 |≦5 mm, and it is preferable to satisfy 0.1 mm≦|HIF 522 |≦3.5 mm; 0.1 mm≦|HIF 512 |≦3.5 mm, where HIF 512 is a distance perpendicular to the optical axis between the inflection point on the object-side surface of the fifth lens, which is the second closest to the optical axis, and the optical axis; HIF 522 is a distance perpendicular to the optical axis between the inflection point on the image-side surface of the fifth lens, which is the second closest to the optical axis, and the optical axis.

The optical image capturing system of the present invention satisfies 0.001 mm≦|HIF 513 |≦5 mm; 0.001 mm≦|HIF 523 |≦5 mm, and it is preferable to satisfy 0.1 mm≦|HIF 523 |≦3.5 mm; 0.1 mm≦|HIF 513 |≦3.5 mm, where HIF 513 is a distance perpendicular to the optical axis between the inflection point on the object-side surface of the fifth lens, which is the third closest to the optical axis, and the optical axis; HIF 523 is a distance perpendicular to the optical axis between the inflection point on the image-side surface of the fifth lens, which is the third closest to the optical axis, and the optical axis.

The optical image capturing system of the present invention satisfies 0.001 mm≦|HIF 514 |≦5 mm; 0.001 mm≦|HIF 524 |≦5 mm, and it is preferable to satisfy 0.1 mm≦|HIF 524 |≦3.5 mm; 0.1 mm≦|HIF 514 |≦3.5 mm, where HIF 514 is a distance perpendicular to the optical axis between the inflection point on the object-side surface of the fifth lens, which is the fourth closest to the optical axis, and the optical axis; HIF 524 is a distance perpendicular to the optical axis between the inflection point on the image-side surface of the fifth lens, which is the fourth closest to the optical axis, and the optical axis.

In an embodiment, the lenses of high Abbe number and the lenses of low Abbe number are arranged in an interlaced arrangement that could be helpful for correction of aberration of the system.

An equation of aspheric surface is

z=ch 2 /[1+[1( k+ 1) c 2 h 2 ] 0.5 ]+A 4 h 4 +A 6 h 6 +A 8 h 8 +A 10 h 10 +A 12 h 12 +A 14 h 14 +A 16 h 16 +A 18 h 18 +A 20 h 20 +  (1)

where z is a depression of the aspheric surface; k is conic constant; c is reciprocal of the radius of curvature; and A4, A6, A8, A10, A12, A14, A16, A18, and A20 are high-order aspheric coefficients.

In the optical image capturing system, the lenses could be made of plastic or glass. The plastic lenses may reduce the weight and lower the cost of the system, and the glass lenses may control the thermal effect and enlarge the space for arrangement of the refractive power of the system. In addition, the opposite surfaces (object-side surface and image-side surface) of the first to the fifth lenses could be aspheric that can obtain more control parameters to reduce aberration. The number of aspheric glass lenses could be less than the conventional spherical glass lenses, which is helpful for reduction of the height of the system.

When the lens has a convex surface, which means that the surface is convex around a position, through which the optical axis passes, and when the lens has a concave surface, which means that the surface is concave around a position, through which the optical axis passes.

The optical image capturing system of the present invention could be applied in a dynamic focusing optical system. It is superior in the correction of aberration and high imaging quality so that it could be allied in lots of fields.

The optical image capturing system of the present invention could further include a driving module to meet different demands, wherein the driving module can be coupled with the lenses to move the lenses. The driving module can be a voice coil motor (VCM), which is used to move the lens for focusing, or can be an optical image stabilization (OIS) component, which is used to lower the possibility of having the problem of image blurring which is caused by subtle movements of the lens while shooting.

To meet different requirements, at least one lens among the first lens to the fifth lens of the optical image capturing system of the present invention can be a light filter, which filters out light of wavelength shorter than 500 nm. Such effect can be achieved by coating on at least one surface of the lens, or by using materials capable of filtering out short waves to make the lens.

We provide several embodiments in conjunction with the accompanying drawings for the best understanding, which are:

First Embodiment

As shown in FIG. 1A and FIG. 1B , an optical image capturing system 10 of the first embodiment of the present invention includes, along an optical axis from an object side to an image side, a first lens 110 , an aperture 100 , a second lens 120 , a third lens 130 , a fourth lens 140 , a fifth lens 150 , an infrared rays filter 180 , an image plane 190 , and an image sensor 192 . FIG. 1C shows a modulation transformation of the optical image capturing system 10 of the first embodiment of the present application in visible spectrum, and FIG. 1D shows a modulation transformation of the optical image capturing system 10 of the first embodiment of the present application in infrared spectrum.

The first lens 110 has negative refractive power and is made of plastic. An object-side surface 112 thereof, which faces the object side, is a convex aspheric surface, and an image-side surface 114 thereof, which faces the image side, is a concave aspheric surface. The object-side surface 112 has an inflection point thereon. A thickness of the first lens 110 on the optical axis is TP 1 , and a thickness of the first lens 110 at the height of a half of the entrance pupil diameter (HEP) is denoted by ETP 1 .

The first lens satisfies SGI 111 =1.96546 mm; |SGI 111 |/(SGI 111 |+TP 1 )=0.72369, where SGI 111 is a displacement in parallel with the optical axis from a point on the object-side surface of the first lens, through which the optical axis passes, to the inflection point on the object-side surface, which is the closest to the optical axis, and SGI 121 is a displacement in parallel with the optical axis from a point on the image-side surface of the first lens, through which the optical axis passes, to the inflection point on the image-side surface, which is the closest to the optical axis.

The first lens satisfies HIF 111 =3.38542 mm; HIF 111 /HOI=0.90519, where HIF 111 is a displacement perpendicular to the optical axis from a point on the object-side surface of the first lens, through which the optical axis passes, to the inflection point, which is the closest to the optical axis; HIF 121 is a displacement perpendicular to the optical axis from a point on the image-side surface of the first lens, through which the optical axis passes, to the inflection point, which is the closest to the optical axis.

The second lens 120 has positive refractive power and is made of plastic. An object-side surface 122 thereof, which faces the object side, is a convex aspheric surface, and an image-side surface 124 thereof, which faces the image side, is a concave aspheric surface. A thickness of the second lens 120 on the optical axis is TP 2 , and thickness of the second lens 120 at the height of a half of the entrance pupil diameter (HEP) is denoted by ETP 2 .

For the second lens, a displacement in parallel with the optical axis from a point on the object-side surface of the second lens, through which the optical axis passes, to the inflection point on the image-side surface, which is the closest to the optical axis is denoted by SGI 211 , and a displacement in parallel with the optical axis from a point on the image-side surface of the second lens, through which the optical axis passes, to the inflection point on the image-side surface, which is the closest to the optical axis is denoted by SGI 221 .

For the second lens, a displacement perpendicular to the optical axis from a point on the object-side surface of the second lens, through which the optical axis passes, to the inflection point, which is the closest to the optical axis is denoted by HIF 211 , and a displacement perpendicular to the optical axis from a point on the image-side surface of the second lens, through which the optical axis passes, to the inflection point, which is the closest to the optical axis is denoted by HIF 221 .

The third lens 130 has positive refractive power and is made of plastic. An object-side surface 132 , which faces the object side, is a convex aspheric surface, and an image-side surface 134 , which faces the image side, is a convex aspheric surface. The object-side surface 132 has an inflection point. A thickness of the third lens 130 on the optical axis is TP 3 , and a thickness of the third lens 130 at the height of a half of the entrance pupil diameter (HEP) is denoted by ETP 3 .

The third lens 130 satisfies SGI 311 =0.00388 mm; |SGI 311 |/(|SGI 311 |+TP 3 )=0.00414, where SGI 311 is a displacement in parallel with the optical axis, from a point on the object-side surface of the third lens, through which the optical axis passes, to the inflection point on the object-side surface, which is the closest to the optical axis, and SGI 321 is a displacement in parallel with the optical axis, from a point on the image-side surface of the third lens, through which the optical axis passes, to the inflection point on the image-side surface, which is the closest to the optical axis.

For the third lens 130 , SGI 312 is a displacement in parallel with the optical axis, from a point on the object-side surface of the third lens, through which the optical axis passes, to the inflection point on the object-side surface, which is the second closest to the optical axis, and SGI 322 is a displacement in parallel with the optical axis, from a point on the image-side surface of the third lens, through which the optical axis passes, to the inflection point on the object-side surface, which is the second closest to the optical axis.

The third lens 130 further satisfies HIF 311 =0.38898 mm; HIF 311 /HOI=0.10400, where HIF 311 is a distance perpendicular to the optical axis between the inflection point on the object-side surface of the third lens, which is the closest to the optical axis, and the optical axis; HIF 321 is a distance perpendicular to the optical axis between the inflection point on the image-side surface of the third lens, which is the closest to the optical axis, and the optical axis.

For the third lens 130 , HIF 312 is a distance perpendicular to the optical axis between the inflection point on the object-side surface of the third lens, which is the second closest to the optical axis, and the optical axis; HIF 322 is a distance perpendicular to the optical axis between the inflection point on the image-side surface of the third lens, which is the second closest to the optical axis, and the optical axis.

The fourth lens 140 has positive refractive power and is made of plastic. An object-side surface 142 , which faces the object side, is a convex aspheric surface, and an image-side surface 144 , which faces the image side, is a convex aspheric surface. The object-side surface 142 has an inflection point. A thickness of the fourth lens 140 on the optical axis is TP 4 , and a thickness of the fourth lens 140 at the height of a half of the entrance pupil diameter (HEP) is denoted by ETP 4 .

The fourth lens 140 satisfies SGI 421 =0.06508 mm; |SGI 421 |/(|SGI 421 |+TP 4 )=0.03459, where SGI 411 is a displacement in parallel with the optical axis, from a point on the object-side surface of the fourth lens, through which the optical axis passes, to the inflection point on the object-side surface, which is the closest to the optical axis, and SGI 421 is a displacement in parallel with the optical axis, from a point on the image-side surface of the fourth lens, through which the optical axis passes, to the inflection point on the image-side surface, which is the closest to the optical axis.

For the fourth lens 140 , SGI 412 is a displacement in parallel with the optical axis, from a point on the object-side surface of the fourth lens, through which the optical axis passes, to the inflection point on the object-side surface, which is the second closest to the optical axis, and SGI 422 is a displacement in parallel with the optical axis, from a point on the image-side surface of the fourth lens, through which the optical axis passes, to the inflection point on the object-side surface, which is the second closest to the optical axis.

The fourth lens 140 further satisfies HIF 421 =0.85606 mm; HIF 421 /HOI=0.22889, where HIF 411 is a distance perpendicular to the optical axis between the inflection point on the object-side surface of the fourth lens, which is the closest to the optical axis, and the optical axis; HIF 421 is a distance perpendicular to the optical axis between the inflection point on the image-side surface of the fourth lens, which is the closest to the optical axis, and the optical axis.

For the fourth lens 140 , HIF 412 is a distance perpendicular to the optical axis between the inflection point on the object-side surface of the fourth lens, which is the second closest to the optical axis, and the optical axis; HIF 422 is a distance perpendicular to the optical axis between the inflection point on the image-side surface of the fourth lens, which is the second closest to the optical axis, and the optical axis.

The fifth lens 150 has negative refractive power and is made of plastic. An object-side surface 152 , which faces the object side, is a concave aspheric surface, and an image-side surface 154 , which faces the image side, is a concave aspheric surface. The object-side surface 152 and the image-side surface 154 both have an inflection point. A thickness of the fifth lens 150 on the optical axis is TP 5 , and a thickness of the fifth lens 150 at the height of a half of the entrance pupil diameter (HEP) is denoted by ETP 5 .

The fifth lens 150 satisfies SGI 511 =−1.51505 mm; |SGI 511 |/(|SGI 511 |+TP 5 )=0.70144; SGI 521 =0.01229 mm; |SGI 521 |/(|SGI 521 |+TP 5 )=0.01870, where SGI 511 is a displacement in parallel with the optical axis, from a point on the object-side surface of the fifth lens, through which the optical axis passes, to the inflection point on the object-side surface, which is the closest to the optical axis, and SGI 521 is a displacement in parallel with the optical axis, from a point on the image-side surface of the fifth lens, through which the optical axis passes, to the inflection point on the image-side surface, which is the closest to the optical axis.

For the fifth lens 150 , SGI 512 is a displacement in parallel with the optical axis, from a point on the object-side surface of the fifth lens, through which the optical axis passes, to the inflection point on the object-side surface, which is the second closest to the optical axis, and SGI 522 is a displacement in parallel with the optical axis, from a point on the image-side surface of the fifth lens, through which the optical axis passes, to the inflection point on the object-side surface, which is the second closest to the optical axis.

The fifth lens 150 further satisfies HIF 511 =2.25435 mm; HIF 511 /HOI=0.60277; HIF 521 =0.82313 mm; HIF 521 /HOI=0.22009, where HIF 511 is a distance perpendicular to the optical axis between the inflection point on the object-side surface of the fifth lens, which is the closest to the optical axis, and the optical axis; HIF 521 is a distance perpendicular to the optical axis between the inflection point on the image-side surface of the fifth lens, which is the closest to the optical axis, and the optical axis.

For the fifth lens 150 , HIF 512 is a distance perpendicular to the optical axis between the inflection point on the object-side surface of the fifth lens, which is the second closest to the optical axis, and the optical axis; HIF 522 is a distance perpendicular to the optical axis between the inflection point on the image-side surface of the fifth lens, which is the second closest to the optical axis, and the optical axis.

A distance in parallel with the optical axis between a coordinate point at a height of ½ HEP on the object-side surface of the first lens 110 and the image plane is ETL, and a distance in parallel with the optical axis between the coordinate point at the height of ½ HEP on the object-side surface of the first lens 110 and a coordinate point at a height of ½ HEP on the image-side surface of the fourth lens 140 is EIN, which satisfy: ETL=10.449 mm; EIN=9.752 mm; EIN/ETL=0.933.

The optical image capturing system of the first embodiment satisfies: ETP 1 =0.870 mm; ETP 2 =0.780 mm; ETP 3 =0.825 mm; ETP 4 =1.562 mm; ETP 5 =0.923 mm. The sum of the aforementioned ETP 1 to ETP 5 is SETP, wherein SETP=4.960 mm. In addition, TP 1 =0.750 mm; TP 2 =0.895 mm; TP 3 =0.932 mm; TP 4 =1.816 mm; TP 5 =0.645 mm. The sum of the aforementioned TP 1 to TP 5 is STP, wherein STP=5.039 mm; SETP/STP=0.984.

In order to enhance the ability of correcting aberration and to lower the difficulty of manufacturing at the same time, the ratio between the thickness (ETP) at the height of a half of the entrance pupil diameter (HEP) and the thickness (TP) of any lens on the optical axis (i.e., ETP/TP) in the optical image capturing system of the first embodiment is particularly controlled, which satisfies: ETP 1 /TP 1 =1.160; ETP 2 /TP 2 =0.871; ETP 3 /TP 3 =0.885; ETP 4 /TP 4 =0.860; ETP 5 /TP 5 =1.431.

In order to enhance the ability of correcting aberration, lower the difficulty of manufacturing, and “slightly shortening” the length of the optical image capturing system at the same time, the ratio between the horizontal distance (ED) between two neighboring lenses at the height of a half of the entrance pupil diameter (HEP) and the parallel distance (IN) between these two neighboring lens on the optical axis (i.e., ED/IN) in the optical image capturing system of the first embodiment is particularly controlled, which satisfies: the horizontal distance between the first lens 110 and the second lens 120 at the height of a half of the entrance pupil diameter (HEP) is denoted by ED 12 , wherein ED 12 =3.152 mm; the horizontal distance between the second lens 120 and the third lens 130 at the height of a half of the entrance pupil diameter (HEP) is denoted by ED 23 , wherein ED 23 =0.478 mm; the horizontal distance between the third lens 130 and the fourth lens 140 at the height of a half of the entrance pupil diameter (HEP) is denoted by ED 34 , wherein ED 34 =0.843 mm; the horizontal distance between the fourth lens 140 and the fifth lens 150 at the height of a half of the entrance pupil diameter (HEP) is denoted by ED 45 , wherein ED 45 =0.320 mm. The sum of the aforementioned ED 12 to ED 45 is SED, wherein SED=4.792 mm.

The horizontal distance between the first lens 110 and the second lens 120 on the optical axis is denoted by IN 12 , wherein IN 12 =3.190 mm, and ED 12 /IN 12 =0.988. The horizontal distance between the second lens 120 and the third lens 130 on the optical axis is denoted by IN 23 , wherein IN 23 =0.561 mm, and ED 23 /IN 23 =0.851. The horizontal distance between the third lens 130 and the fourth lens 140 on the optical axis is denoted by IN 34 , wherein IN 34 =0.656 mm, and ED 34 /IN 34 =1.284. The horizontal distance between the fourth lens 140 and the fifth lens 150 on the optical axis is denoted by IN 45 , wherein IN 45 =0.405 mm, and ED 45 /IN 45 =0.792. The sum of the aforementioned IN 12 to IN 45 is denoted by SIN, wherein SIN=0.999, and SED/SIN=1.083.

The optical image capturing system of the first embodiment satisfies::ED 12 /ED 23 =6.599; ED 23 /ED 34 =0.567; ED 34 /ED 45 =2.630; IN 12 /IN 23 =5.687; IN 23 /IN 34 =0.855; IN 34 /IN 45 =1.622.

The horizontal distance in parallel with the optical axis between a coordinate point at the height of ½ HEP on the image-side surface of the fifth lens 150 and image surface is denoted by EBL, wherein EBL=0.697 mm. The horizontal distance in parallel with the optical axis between the point on the image-side surface of the fifth lens 150 where the optical axis passes through and the image plane is denoted by BL, wherein BL=0.71184 mm. The optical image capturing system of the first embodiment satisfies: EBL/BL=0.979152. The horizontal distance in parallel with the optical axis between the coordinate point at the height of ½ HEP on the image-side surface of the fifth lens 150 and the infrared rays filter 180 is denoted by EIR, wherein EIR=0.085 mm. The horizontal distance in parallel with the optical axis between the point on the image-side surface of the fifth lens 150 where the optical axis passes through and the infrared rays filter 180 is denoted by PIR, wherein PIR=0.100 mm, and it satisfies: EIR/PIR=0.847.

The infrared rays filter 180 is made of glass and between the fifth lens 150 and the image plane 190 . The infrared rays filter 180 gives no contribution to the focal length of the system.

The optical image capturing system 10 of the first embodiment has the following parameters, which are f=3.03968 mm; f/HEP=1.6; and HAF=50.001 and tan (HAF)=1.1918, where f is a focal length of the system; HAF is a half of the maximum field angle; and HEP is an entrance pupil diameter.

The parameters of the lenses of the first embodiment are f 1 =−9.24529 mm; |f/f 1 |=0.32878; f 5 =−2.32439; and |f 1 |>f 5 , where f 1 is a focal length of the first lens 110 ; and f 5 is a focal length of the fifth lens 150 .

The first embodiment further satisfies |f 2 |+|f 3 |+|f 4 |=17.3009 mm; |f 1 |+|f 5 |=11.5697 mm and |f 2 |+|f 3 |+|f 4 |>|f 1 |+|f 5 |, where f 2 is a focal length of the second lens 120 , f 3 is a focal length of the third lens 130 , f 4 is a focal length of the fourth lens 140 , and f 5 is a focal length of the fifth lens 150 .

The optical image capturing system 10 of the first embodiment further satisfies ΣPPR=f/f 2 +f/f 3 +f/f 4 =1.86768; ΣNPR=f/f 1 +f/f 5 =−1.63651; ΣPPR/|ΣNPR|=1.14125; |f/f 2 |=0.47958; |f/f 3 |=0.38289; |f/f 4 |=1.00521; |f/f 5 |=1.30773, where PPR is a ratio of a focal length f of the optical image capturing system to a focal length fp of each of the lenses with positive refractive power; and NPR is a ratio of a focal length f of the optical image capturing system to a focal length fn of each of lenses with negative refractive power.

The optical image capturing system 10 of the first embodiment further satisfies InTL+BFL=HOS; HOS=10.56320 mm; HOI=3.7400 mm; HOS/HOI=2.8244; HOS/f=3.4751; InS=6.21073 mm; and InS/HOS=0.5880, where InTL is a distance between the object-side surface 112 of the first lens 110 and the image-side surface 154 of the fifth lens 150 ; HOS is a height of the image capturing system, i.e. a distance between the object-side surface 112 of the first lens 110 and the image plane 190 ; InS is a distance between the aperture 100 and the image plane 190 ; HOI is a half of a diagonal of an effective sensing area of the image sensor 192 , i.e., the maximum image height; and BFL is a distance between the image-side surface 154 of the fifth lens 150 and the image plane 190 .

The optical image capturing system 10 of the first embodiment further satisfies ΣTP=5.0393 mm; InTL=9.8514 mm and ΣTP/InTL=0.5115, where ΣTP is a sum of the thicknesses of the lenses 110 - 150 with refractive power. It is helpful for the contrast of image and yield rate of manufacture and provides a suitable back focal length for installation of other elements.

The optical image capturing system 10 of the first embodiment further satisfies |R 1 /R 2 |=1.9672, where R 1 is a radius of curvature of the object-side surface 112 of the first lens 110 , and R 2 is a radius of curvature of the image-side surface 114 of the first lens 110 . It provides the first lens with a suitable positive refractive power to reduce the increase rate of the spherical aberration.

The optical image capturing system 10 of the first embodiment further satisfies (R 9 −R 10 )/(R 9 +R 10 )=+1.1505, where R 9 is a radius of curvature of the object-side surface 152 of the fifth lens 150 , and R 10 is a radius of curvature of the image-side surface 154 of the fifth lens 150 . It may modify the astigmatic field curvature.

The optical image capturing system 10 of the first embodiment further satisfies ΣPP=f 2 +f 3 +f 4 =17.30090 mm; and f 2 /(f 2 +f 3 +f 4 )=0.36635, where ΣPP is a sum of the focal lengths fp of each lens with positive refractive power. It is helpful to share the positive refractive power of the second lens 120 to other positive lenses to avoid the significant aberration caused by the incident rays.

The optical image capturing system 10 of the first embodiment further satisfies ΣNP=f 1 +f 5 =−11.56968 mm; and f 5 /(f 1 +f 5 )=0.20090, where ΣNP is a sum of the focal lengths fn of each lens with negative refractive power. It is helpful to share the negative refractive power of the fifth lens 150 to the other negative lens, which avoid the significant aberration caused by the incident rays.

The optical image capturing system 10 of the first embodiment further satisfies IN 12 =3.19016 mm and IN 12 /f=1.04951, where IN 12 is a distance on the optical axis between the first lens 110 and the second lens 120 . It may correct chromatic aberration and improve the performance.

The optical image capturing system 10 of the first embodiment further satisfies IN 45 =0.40470 mm; IN 45 /f=0.13314, where IN 45 is a distance on the optical axis between the fourth lens 140 and the fifth lens 150 . It may correct chromatic aberration and improve the performance.

The optical image capturing system 10 of the first embodiment further satisfies TP 1 =0.75043 mm; TP 2 =0.89543 mm; TP 3 =0.93225 mm; and (TP 1 +IN 12 )/TP 2 =4.40078, where TP 1 is a central thickness of the first lens 110 on the optical axis, TP 2 is a central thickness of the second lens 120 on the optical axis, and TP 3 is a central thickness of the third lens 130 on the optical axis. It may control the sensitivity of manufacture of the system and improve the performance.

The optical image capturing system 10 of the first embodiment further satisfies TP 4 =1.81634 mm; TP 5 =0.64488 mm; and (TP 5 +IN 45 )/TP 4 =0.57785, where TP 4 is a central thickness of the fourth lens 140 on the optical axis, TP 5 is a central thickness of the fifth lens 150 on the optical axis, and IN 45 is a distance on the optical axis between the fourth lens 140 and the fifth lens 150 . It may control the sensitivity of manufacture of the system and lower the total height of the system.

The optical image capturing system 10 of the first embodiment further satisfies TP 2 /TP 3 =0.96051; TP 3 /TP 4 =0.51325; TP 4 /TP 5 =2.81657; and TP 3 /(IN 23 +TP 3 +IN 34 )=0.43372, where IN 34 is a distance on the optical axis between the third lens 130 and the fourth lens 140 . It may control the sensitivity of manufacture of the system and lower the total height of the system.

The optical image capturing system 10 of the first embodiment further satisfies InRS 41 =−0.09737 mm; InRS 42 =−1.31040 mm; |InRS 41 |/TP 4 =0.05361 and |InRS 42 |/TP 4 =0.72145, where InRS 41 is a displacement in parallel with the optical axis from a point on the object-side surface 142 of the fourth lens, through which the optical axis passes, to a point at the maximum effective semi diameter of the object-side surface 142 of the fourth lens; InRS 42 is a displacement in parallel with the optical axis from a point on the image-side surface 144 of the fourth lens, through which the optical axis passes, to a point at the maximum effective semi diameter of the image-side surface 144 of the fourth lens; and TP 4 is a central thickness of the fourth lens 140 on the optical axis. It is helpful for manufacturing and shaping of the lenses and is helpful to reduce the size.

The optical image capturing system 10 of the first embodiment further satisfies HVT 41 =1.41740 mm; HVT 42 =0, where HVT 41 a distance perpendicular to the optical axis between the critical point on the object-side surface 142 of the fourth lens and the optical axis; and HVT 42 a distance perpendicular to the optical axis between the critical point on the image-side surface 144 of the fourth lens and the optical axis.

The optical image capturing system 10 of the first embodiment further satisfies InRS 51 =−1.63543 mm; InRS 52 =−0.34495 mm; |InRS 51 |/TP 5 =2.53604 and |InRS 52 |/TP 5 =0.53491, where InRS 51 is a displacement in parallel with the optical axis from a point on the object-side surface 152 of the fifth lens, through which the optical axis passes, to a point at the maximum effective semi diameter of the object-side surface 152 of the fifth lens; InRS 52 is a displacement in parallel with the optical axis from a point on the image-side surface 154 of the fifth lens, through which the optical axis passes, to a point at the maximum effective semi diameter of the image-side surface 154 of the fifth lens; and TP 5 is a central thickness of the fifth lens 150 on the optical axis. It is helpful for manufacturing and shaping of the lenses and is helpful to reduce the size.

The optical image capturing system 10 of the first embodiment satisfies HVT 51 =0; HVT 52 =1.35891 mm; and HVT 51 /HVT 52 =0, where HVT 51 a distance perpendicular to the optical axis between the critical point on the object-side surface 152 of the fifth lens and the optical axis; and HVT 52 a distance perpendicular to the optical axis between the critical point on the image-side surface 154 of the fifth lens and the optical axis.

The optical image capturing system 10 of the first embodiment satisfies HVT 52 /HOI=0.36334. It is helpful for correction of the aberration of the peripheral view field of the optical image capturing system.

The optical image capturing system 10 of the first embodiment satisfies HVT 52 /HOS=0.12865. It is helpful for correction of the aberration of the peripheral view field of the optical image capturing system.

The third lens 130 and the fifth lens 150 have negative refractive power. The optical image capturing system 10 of the first embodiment further satisfies NA 5 /NA 3 =0.368966, where NA 3 is an Abbe number of the third lens 130 ; and NA 5 is an Abbe number of the fifth lens 150 . It may correct the aberration of the optical image capturing system.

The optical image capturing system 10 of the first embodiment further satisfies |TDT|=0.63350%; |ODT|=2.06135%, where TDT is TV distortion; and ODT is optical distortion.

For the optical image capturing system of the first embodiment, the values of MTF in the spatial frequency of 55 cycles/mm at the optical axis, 0.3 field of view, and 0.7 field of view on an image plane are respectively denoted by MTFE 0 , MTFE 3 , and MTFE 7 , wherein MTFE 0 is around 0.65, MTFE 3 is around 0.47, and MTEF 7 is around 0.39; the values of MTF in the spatial frequency of 110 cycles/mm at the optical axis, 0.3 field of view, and 0.7 field of view on an image plane are respectively denoted by MTFQ 0 , MTFQ 3 , and MTFQ 7 , wherein MTFQ 0 is around 0.38, MTFQ 3 is around 0.14, and MTFQ 7 is around 0.13; the values of modulation transfer function (MTF) in the spatial frequency of 220 cycles/mm at the optical axis, 0.3 field of view, and 0.7 field of view on an image plane are respectively denoted by MTFH 0 , MTFH 3 , and MTFH 7 , wherein MTFH 0 is around 0.17, MTFH 3 is around 0.07, and MTFH 7 is around 0.14.

For the optical image capturing system of the first embodiment, when the infrared wavelength of 850 nm focuses on the image plane, the values of MTF in spatial frequency (55 cycles/mm) at the optical axis, 0.3 HOI, and 0.7 HOI on an image plane are respectively denoted by MTFI 0 , MTFI 3 , and MTFI 7 , wherein MTFI 0 is around 0.05, MTFI 3 is around 0.12, and MTFI 7 is around 0.11.

The parameters of the lenses of the first embodiment are listed in Table 1 and Table 2.

The detail parameters of the first embodiment are listed in Table 1, in which the unit of the radius of curvature, thickness, and focal length are millimeter, and surface 0-10 indicates the surfaces of all elements in the system in sequence from the object side to the image side. Table 2 is the list of coefficients of the aspheric surfaces, in which A 1 -A 20 indicate the coefficients of aspheric surfaces from the first order to the twentieth order of each aspheric surface. The following embodiments have the similar diagrams and tables, which are the same as those of the first embodiment, so we do not describe it again.

Second Embodiment

As shown in FIG. 2A and FIG. 2B , an optical image capturing system 20 of the second embodiment of the present invention includes, along an optical axis from an object side to an image side, a first lens 210 , a second lens 220 , an aperture 200 , a third lens 230 , a fourth lens 240 , a fifth lens 250 , an infrared rays filter 280 , an image plane 290 , and an image sensor 292 . FIG. 2C shows a modulation transformation of the optical image capturing system 20 of the second embodiment of the present application in visible spectrum, and FIG. 2D shows a modulation transformation of the optical image capturing system 20 of the second embodiment of the present application in infrared spectrum.

The first lens 210 has negative refractive power and is made of glass. An object-side surface 212 thereof, which faces the object side, is a convex aspheric surface, and an image-side surface 214 thereof, which faces the image side, is a concave aspheric surface. The object-side surface 212 has an inflection point.

The second lens 220 has positive refractive power and is made of plastic. An object-side surface 222 thereof, which faces the object side, is a concave aspheric surface, and an image-side surface 224 thereof, which faces the image side, is a convex aspheric surface. The object-side surface 222 has an inflection point.

The third lens 230 has negative refractive power and is made of plastic. An object-side surface 232 , which faces the object side, is a concave aspheric surface, and an image-side surface 234 , which faces the image side, is a concave aspheric surface. The image-side surface 234 has an inflection point.

The fourth lens 240 has positive refractive power and is made of plastic. An object-side surface 242 , which faces the object side, is a convex aspheric surface, and an image-side surface 244 , which faces the image side, is a convex aspheric surface. The image-side surface 244 has an inflection point.

The fifth lens 250 has positive refractive power and is made of plastic. An object-side surface 252 , which faces the object side, is a convex surface, and an image-side surface 254 , which faces the image side, is a convex surface. It may help to shorten the back focal length to keep small in size. In addition, the fifth lens 250 can have an inflection point, which may reduce an incident angle of the light of an off-axis field of view and correct the aberration of the off-axis field of view.

The infrared rays filter 280 is made of glass and between the fifth lens 250 and the image plane 290 . The infrared rays filter 280 gives no contribution to the focal length of the system.

The optical image capturing system of the second embodiment satisfies |f 2 |+|f 3 |+|f 4 |=22.5725 mm; |f 1 |+|f 5 |=44.8040 mm; and |f 2 |+|f 3 |+|f 4 |<|f 1 |+|f 5 |, where f 2 is a focal length of the second lens 220 , f 3 is a focal length of the third lens 230 , f 4 is a focal length of the fourth lens 240 , and f 5 is a focal length of the fifth lens 250 .

In the second embodiment, the optical image capturing system of the second embodiment further satisfies ΣPP=56.19886 mm; and f 2 /ΣPP=0.26250, where ΣPP is a sum of the focal lengths of each positive lens. It is helpful to share the positive refractive power of one single lens to other positive lenses to avoid the significant aberration caused by the incident rays.

The optical image capturing system of the second embodiment further satisfies ΣNP=−11.17763 mm; and f 1 /ΣNP=0.60216, where ΣNP is a sum of the focal lengths of each negative lens. It is helpful to share the negative refractive power of one single lens to the other negative lens.

The parameters of the lenses of the second embodiment are listed in Table 3 and Table 4.

An equation of the aspheric surfaces of the second embodiment is the same as that of the first embodiment, and the definitions are the same as well.

The exact parameters of the second embodiment based on Table 3 and Table 4 are listed in the following table:

The results of the equations of the second embodiment based on Table 3 and Table 4 are listed in the following table:

Third Embodiment

As shown in FIG. 3A and FIG. 3B , an optical image capturing system of the third embodiment of the present invention includes, along an optical axis from an object side to an image side, a first lens 310 , a second lens 320 , an aperture 300 , a third lens 330 , a fourth lens 340 , a fifth lens 350 , an infrared rays filter 380 , an image plane 390 , and an image sensor 392 . FIG. 3C shows a modulation transformation of the optical image capturing system 30 of the third embodiment of the present application in visible spectrum, and FIG. 3D shows a modulation transformation of the optical image capturing system 30 of the third embodiment of the present application in infrared spectrum.

The first lens 310 has negative refractive power and is made of glass. An object-side surface 312 thereof, which faces the object side, is a concave aspheric surface, and an image-side surface 314 thereof, which faces the image side, is a concave aspheric surface.

The second lens 320 has positive refractive power and is made of plastic. An object-side surface 322 thereof, which faces the object side, is a convex aspheric surface, and an image-side surface 324 thereof, which faces the image side, is a convex aspheric surface.

The third lens 330 has negative refractive power and is made of plastic. An object-side surface 332 thereof, which faces the object side, is a concave surface, and an image-side surface 334 thereof, which faces the image side, is a concave aspheric surface. The image-side surface 334 has an inflection point.

The fourth lens 340 has positive refractive power and is made of plastic. An object-side surface 342 , which faces the object side, is a convex aspheric surface, and an image-side surface 344 , which faces the image side, is a convex aspheric surface. The object-side surface 342 has an inflection point.

The fifth lens 350 has positive refractive power and is made of plastic. An object-side surface 352 , which faces the object side, is a convex surface, and an image-side surface 354 , which faces the image side, is a concave surface. It may help to shorten the back focal length to keep small in size.

The infrared rays filter 380 is made of glass and between the fifth lens 350 and the image plane 390 . The infrared rays filter 390 gives no contribution to the focal length of the system.

The optical image capturing system of the second embodiment satisfies |f 2 |+|f 3 |+|f 4 |=15.2852 mm; |f 1 |+|f 5 |=59.7459 mm; and |f 2 |+|f 3 |+|f 4 |<|f 1 |+|f 5 |, where f 2 is a focal length of the second lens 320 , f 3 is a focal length of the third lens 330 , f 4 is a focal length of the fourth lens 340 , and f 5 is a focal length of the fifth lens 350 .

In the third embodiment, the optical image capturing system of the third embodiment further satisfies ΣPP=63.04465 mm; and f 2 /ΣPP=0.10024 mm, where ΣPP is a sum of the focal lengths of each positive lens. It is helpful to share the positive refractive power of one single lens to other positive lenses to avoid the significant aberration caused by the incident rays.

The optical image capturing system of the third embodiment further satisfies ΣNP=−11.98641 mm; and f 1 /ΣNP=0.62770, where ΣNP is a sum of the focal lengths of each negative lens. It is helpful to share the negative refractive power of one single lens to the other negative lens.

The parameters of the lenses of the third embodiment are listed in Table 5 and Table 6.

An equation of the aspheric surfaces of the third embodiment is the same as that of the first embodiment, and the definitions are the same as well.

The exact parameters of the third embodiment based on Table 5 and Table 6 are listed in the following table:

The results of the equations of the third embodiment based on Table 5 and Table 6 are listed in the following table:

Fourth Embodiment

As shown in FIG. 4A and FIG. 4B , an optical image capturing system 40 of the fourth embodiment of the present invention includes, along an optical axis from an object side to an image side, a first lens 410 , a second lens 420 , an aperture 400 , a third lens 430 , a fourth lens 440 , a fifth lens 450 , an infrared rays filter 480 , an image plane 490 , and an image sensor 492 . FIG. 4C shows a modulation transformation of the optical image capturing system 40 of the fourth embodiment of the present application in visible spectrum, and FIG. 4D shows a modulation transformation of the optical image capturing system 40 of the fourth embodiment of the present application in infrared spectrum.

The first lens 410 has negative refractive power and is made of glass. An object-side surface 412 thereof, which faces the object side, is a convex aspheric surface, and an image-side surface 414 thereof, which faces the image side, is a concave aspheric surface.

The second lens 420 has positive refractive power and is made of plastic. An object-side surface 422 thereof, which faces the object side, is a concave aspheric surface, and an image-side surface 424 thereof, which faces the image side, is a convex aspheric surface. The object-side surface 422 has an inflection point.

The third lens 430 has negative refractive power and is made of plastic. An object-side surface 432 thereof, which faces the object side, is a concave aspheric surface, and an image-side surface 434 thereof, which faces the image side, is a concave aspheric surface.

The fourth lens 440 has positive refractive power and is made of plastic. An object-side surface 442 , which faces the object side, is a convex aspheric surface, and an image-side surface 444 , which faces the image side, is a convex aspheric surface. The image-side surface 444 has an inflection point.

The fifth lens 450 has positive refractive power and is made of plastic. An object-side surface 452 , which faces the object side, is a convex surface, and an image-side surface 454 , which faces the image side, is a convex surface. It may help to shorten the back focal length to keep small in size.

The infrared rays filter 480 is made of glass and between the fifth lens 450 and the image plane 490 . The infrared rays filter 480 gives no contribution to the focal length of the system.

The optical image capturing system of the second embodiment satisfies |f 2 |+|f 3 |+|f 4 |=22.2560 mm; |f 1 |+|f 5 |=35.8781 mm; and |f 2 |+|f 3 |+|f 4 |<|f 1 |+|f 5 |, where f 2 is a focal length of the second lens 420 , f 3 is a focal length of the third lens 430 , f 4 is a focal length of the fourth lens 440 , and f 5 is a focal length of the fifth lens 450 .

In the fourth embodiment, the optical image capturing system of the fourth embodiment further satisfies ΣPP=47.32848 mm; and f 2 /ΣPP=0.31072, where ΣPP is a sum of the focal lengths of each positive lens. It is helpful to share the positive refractive power of one single lens to other positive lenses to avoid the significant aberration caused by the incident rays.

The optical image capturing system of the fourth embodiment further satisfies ΣNP=−10.80556 mm; and f 1 /ΣNP=0.62340, where ΣNP is a sum of the focal lengths of each negative lens. It is helpful to share the negative refractive power of one single lens to the other negative lens.

The parameters of the lenses of the fourth embodiment are listed in Table 7 and Table 8.

An equation of the aspheric surfaces of the fourth embodiment is the same as that of the first embodiment, and the definitions are the same as well.

The exact parameters of the fourth embodiment based on Table 7 and Table 8 are listed in the following table:

The results of the equations of the fourth embodiment based on Table 7 and Table 8 are listed in the following table:

Fifth Embodiment

As shown in FIG. 5A and FIG. 5B , an optical image capturing system of the fifth embodiment of the present invention includes, along an optical axis from an object side to an image side, a first lens 510 , a second lens 520 , an aperture 500 , a third lens 530 , a fourth lens 540 , a fifth lens 550 , an infrared rays filter 580 , an image plane 590 , and an image sensor 592 . FIG. 5C shows a modulation transformation of the optical image capturing system 50 of the fifth embodiment of the present application in visible spectrum, and FIG. 5D shows a modulation transformation of the optical image capturing system 50 of the fifth embodiment of the present application in infrared spectrum.

The first lens 510 has negative refractive power and is made of glass. An object-side surface 512 , which faces the object side, is a convex aspheric surface, and an image-side surface 514 , which faces the image side, is a concave aspheric surface.

The second lens 520 has positive refractive power and is made of plastic. An object-side surface 522 thereof, which faces the object side, is a convex aspheric surface, and an image-side surface 524 thereof, which faces the image side, is a convex aspheric surface.

The third lens 530 has negative refractive power and is made of plastic. An object-side surface 532 , which faces the object side, is a concave aspheric surface, and an image-side surface 534 , which faces the image side, is a concave aspheric surface. The image-side surface 534 has an inflection point.

The fourth lens 540 has positive refractive power and is made of plastic. An object-side surface 542 , which faces the object side, is a convex aspheric surface, and an image-side surface 544 , which faces the image side, is a convex aspheric surface. The image-side surface 544 has an inflection point.

The fifth lens 550 has positive refractive power and is made of plastic. An object-side surface 552 , which faces the object side, is a convex surface, and an image-side surface 554 , which faces the image side, is a concave surface. It may help to shorten the back focal length to keep small in size.

The infrared rays filter 580 is made of glass and between the fifth lens 550 and the image plane 590 . The infrared rays filter 580 gives no contribution to the focal length of the system.

The optical image capturing system of the second embodiment satisfies |f 2 |+|f 3 |+|f 4 |=14.2804 mm; |f 1 |+|f 5 |=96.8961 mm; and |f 2 |+|f 3 |+|f 4 |<|f 1 |+|f 5 |, where f 2 is a focal length of the second lens 520 , f 3 is a focal length of the third lens 530 , f 4 is a focal length of the fourth lens 540 , and f 5 is a focal length of the fifth lens 550 .

In the fifth embodiment, the optical image capturing system of the fifth embodiment further satisfies ΣPP=100.22352 mm; and f 2 /ΣPP=0.06193, where ΣPP is a sum of the focal lengths of each positive lens. It is helpful to share the positive refractive power of one single lens to other positive lenses to avoid the significant aberration caused by the incident rays.

The optical image capturing system of the fifth embodiment further satisfies ΣNP=−10.95302 mm; and f 1 /ΣNP=0.65899, where ΣNP is a sum of the focal lengths of each negative lens. It is helpful to share the negative refractive power of one single lens to the other negative lens.

The parameters of the lenses of the fifth embodiment are listed in Table 9 and Table 10.

An equation of the aspheric surfaces of the fifth embodiment is the same as that of the first embodiment, and the definitions are the same as well.

The exact parameters of the fifth embodiment based on Table 9 and Table 10 are listed in the following table:

The results of the equations of the fifth embodiment based on Table 9 and Table 10 are listed in the following table:

Sixth Embodiment

As shown in FIG. 6A and FIG. 6B , an optical image capturing system of the sixth embodiment of the present invention includes, along an optical axis from an object side to an image side, a first lens 610 , a second lens 620 , an aperture 600 , a third lens 630 , a fourth lens 640 , a fifth lens 650 , an infrared rays filter 680 , an image plane 690 , and an image sensor 692 . FIG. 6C shows a modulation transformation of the optical image capturing system 60 of the sixth embodiment of the present application in visible spectrum, and FIG. 6D shows a modulation transformation of the optical image capturing system 60 of the sixth embodiment of the present application in infrared spectrum.

The first lens 610 has negative refractive power and is made of plastic. An object-side surface 612 , which faces the object side, is a convex aspheric surface, and an image-side surface 614 , which faces the image side, is a concave aspheric surface. The object-side surface 612 and the image-side surface 614 both have an inflection point.

The second lens 620 has positive refractive power and is made of plastic. An object-side surface 622 thereof, which faces the object side, is a convex aspheric surface, and an image-side surface 624 thereof, which faces the image side, is a convex aspheric surface. The object-side surface 622 has an inflection point.

The third lens 630 has positive refractive power and is made of plastic. An object-side surface 632 , which faces the object side, is a convex aspheric surface, and an image-side surface 634 , which faces the image side, is a convex aspheric surface. The object-side surface 632 has an inflection point.

The fourth lens 640 has negative refractive power and is made of plastic. An object-side surface 642 , which faces the object side, is a concave aspheric surface, and an image-side surface 644 , which faces the image side, is a convex aspheric surface. The object-side surface 642 has two inflection points, and the image-side surface 644 has an inflection point.

The fifth lens 650 has positive refractive power and is made of plastic. An object-side surface 652 , which faces the object side, is a convex surface, and an image-side surface 654 , which faces the image side, is a concave surface. The object-side surface 652 has two inflection points, and the image-side surface 654 has an inflection point. It may help to shorten the back focal length to keep small in size. In addition, it may reduce an incident angle of the light of an off-axis field of view and correct the aberration of the off-axis field of view.

The infrared rays filter 680 is made of glass and between the fifth lens 650 and the image plane 690 . The infrared rays filter 680 gives no contribution to the focal length of the system.

The optical image capturing system of the second embodiment satisfies |f 2 |+|f 3 |+|f 4 |=8.4735 mm; |f 1 |+|f 5 |=8.9495 mm; and |f 2 |+|f 3 |+|f 4 |<|f 1 |+|f 5 |, where f 2 is a focal length of the second lens 620 , f 3 is a focal length of the third lens 630 , f 4 is a focal length of the fourth lens 640 , and f 5 is a focal length of the fifth lens 650 .

The optical image capturing system of the sixth embodiment further satisfies ΣPP=11.46338 mm; and f 3 /ΣPP=0.15626, where ΣPP is a sum of the focal lengths of each positive lens. It is helpful to share the positive refractive power of the third lens 630 to other positive lenses to avoid the significant aberration caused by the incident rays.

The optical image capturing system of the sixth embodiment further satisfies ΣNP=−5.95967 mm; and f 1 /ΣNP=0.56425, where ΣNP is a sum of the focal lengths of each negative lens. It is helpful to share the negative refractive power of the first lens 610 to the other negative lens to avoid the significant aberration caused by the incident rays.

The parameters of the lenses of the sixth embodiment are listed in Table 11 and Table 12.

An equation of the aspheric surfaces of the sixth embodiment is the same as that of the first embodiment, and the definitions are the same as well.

The exact parameters of the sixth embodiment based on Table 11 and Table 12 are listed in the following table:

The results of the equations of the sixth embodiment based on Table 11 and Table 12 are listed in the following table:

It must be pointed out that the embodiments described above are only some embodiments of the present invention. All equivalent structures which employ the concepts disclosed in this specification and the appended claims should fall within the scope of the present invention.