Lens for light-emitting device

FIG. 1 is a front view of a lens for light-emitting device.

FIG. 2 is a rear view thereof.

FIG. 3 is a right side view thereof, the left side view being a mirror image of the right side view.

FIG. 4 is a top view thereof, the bottom view being a mirror image of the top view.

FIG. 5 is a reference enlarged view showing A—A cross-section in FIG. 1; and ,

FIG. 6 is a reference enlarged view showing an area indicated by B—B′ and C—C′ in FIG. 2.