Patent ID: 8998447
Filing Date: 2015-04-07
Classification: F21V,G02B,G03B

Abstract:
1. An optical system for providing illumination to a pupil of an imaging device, the optical system comprising: a first two-dimensional array of first light sources comprising: a second two-dimensional array of second light sources comprising: wherein the second rows of second light sources are interleaved with the first rows of first light sources in the second direction, and the second columns of second light sources are interleaved with the first columns of first light sources in the first direction, and wherein the third direction is a specific direction along an axis; a first set of first reflectors disposed as an array in the third direction and staggered in the second direction, such that each first reflector is operable to reflect first light beams provided by a respective first row of first light sources into the second direction toward the pupil; and a second set of second reflectors disposed as an array in the third direction and staggered in the second direction, such that each second reflector is operable to reflect second light beams provided by a respective second row of second light sources into the second direction toward the pupil, wherein each second reflector is stacked in front of a corresponding first reflector in the second direction toward the pupil, and each second reflector comprises transparent regions operable to transmit the first light beams reflected by a corresponding first reflector, and wherein the first two-dimensional array of first light sources and the second two-dimension array of light sources are both disposed on a same side of the first set of first reflectors and the second set of second reflectors.