Radiation sensing device and control circuit

The device of claim 1, further comprising a signaling interface configured to output information obtained in accordance with the sensor output, the interface configured to output signals towards a dedicated wire or superimpose signals on a power supply line or using a wireless interface.

The device of claim 1, wherein the radiation sensor and the illumination device have a common power supply and/or one or more common control signal lines.

The device of claim 1, wherein the radiation sensor and the illumination device have a common substrate and/or a common control circuit.

The device of claim 1, wherein the first radiation guiding member has first and second radiation guiding regions which provide first and second focusing regions or focusing spots, respectively.

The device of claim 1, further comprising isolation means for providing thermal isolation between the radiation sensor and the illumination device, the isolation means comprising a radiation barrier and/or a heat conduction barrier and/or a venting structure for the sensor.

The device of claim 1, further comprising heat flow distribution means for shaping heat flow from the illumination device to the radiation sensor.

The device of claim 1, further comprising a sensor circuit, an illumination circuit and a connection amongst them.

The device of claim 1, wherein one of the radiation guiding members is attached to the sensor.

The device of claim 1, wherein at least one of the radiation guiding members is adjustable for providing selective spatial sensitivity.

The device of claim 1, further comprising one or more of the following features:nthe radiation sensor comprises a thermopile or a bolometer or a pyrodetector or a photo diode or an infrared diode, or an array of such components;the illumination device comprises one or more spot type or linear radiation devices;a power supply;the first and/or the second radiation guiding member comprises a mirror or a multi-facetted mirror or a lens or a multi-facetted lens or a Fresnel lens or a multi-facetted Fresnel lens or a phase plate or an interference grid, the first and/or the second radiation guiding member has a radiation converging or radiation focusing design for guiding radiation towards or from a focusing region or focusing spot;a holding structure for holding the radiation sensor, the illumination device and the radiation guiding member in a defined spatial relationship with respect to each other; andone or more A/D converters between the radiation sensor and/or the illumination device and a digital control circuit;a memory for holding a control program and/or control data and/or control parameters;the first radiation path has a focal length of at least 20 mm;the radiation sensor, the illumination device or a socket for it and the first radiation guiding member are formed as a unit; andthe radiation sensor has a housing with a radiation permeable window of a focal length of larger than 50 mm.

A control circuit for a device according to claim 1, further comprising:na first sensor circuit for operating one or more radiation sensors;an illumination circuit for operating one or more illumination devices;at least one connection amongst said circuits; andpower supply lines for said circuits.

The radiation sensing device of claim 1, wherein the first radiation comprises infrared radiation.

The radiation sensing device of claim 1, wherein the path for guiding converges or focuses the first radiation towards the sensor.

The radiation sensing device of claim 1, wherein the second radiation comprises visual radiation.

The device of claim 1 wherein the radiation sensing device is configured such that the first radiation reaches the radiation sensor only via the radiation guiding member.

The device of claim 1, wherein the illumination device is configured to produce regular room illumination.

The device of claim 23, wherein the device is configured such that all of the infrared radiation that reaches the radiation sensor does so only via the reflective radiation guiding member.

The device of claim 23, further comprising a timer or sensor circuit for switching off illumination certain while after a latest detection signal or event.

The device of claim 23 configured to produce regular room illumination with visible light from the visible light illuminator.

The device of claim 23, wherein the visible light illuminator is coupled to the substrate.

The device of claim 23, further comprising a second radiation guiding member forming at least a part of said first radiation path.

The method of claim 30, further comprising switching off the visible light illuminator a certain while after a latest detection signal or event has occurred.

The method of claim 30, further comprising timing the certain while with a timer.

The method of claim 30, wherein the radiation guiding member is reflective, such that:ndirecting the infrared radiation comprises reflecting the infrared radiation, anddirecting the visible light comprises reflecting the visible light.

The method of claim 30, wherein the infrared radiation sensor and the visible light illuminator are both physically mounted to one single substrate.

The method of claim 30, wherein directing the infrared radiation to the infrared radiation sensor is further accomplished using a second radiation guiding member.