INPUT/OUTPUT LENS, ILLUMINATION DEVICE AND ELECTRONIC DEVICE Russian patent published in 2013 - IPC G02B19/00 F21V5/04 G02B3/10 

FIELD: physics.

SUBSTANCE: input/output lens is meant for input/output of a first light, having a first wavelength, from a first light source together with a second light, having a second wavelength, from a second light source lying next to the first light source. The lens has a first surface facing the first and second light sources. The first surface has a first and a second region, the first region having a first region curvature and the second region having a second region curvature. The second surface lies on the opposite side of the first surface and a second surface curvature. The position of the centre of curvature of the first region is different from that of the centre of curvature of the second region. The centre of curvature of the second surface and the centre of curvature of the first region lie on the optical axis of the first or second light source.

EFFECT: high efficiency of utilising light and high quality of wave front of the light flux.

20 cl, 26 dwg