Patent ID: 9239467
Filing Date: 2016-01-19
CPC Classification: G01B,G02B,G03B,G06K,G06T,H04N

Claim Text:
1. Optical apparatus, comprising first and second diffractive optical elements (DOEs) arranged in series to diffract an input beam of radiation, wherein the first DOE is configured to diffract the input beam so as to generate a pattern of spots in a tile with a specified divergence angle, including spots corresponding to extreme diffraction orders of the first DOE at borders of the tile, while the second DOE is configured to split the input beam into a matrix of output beams with a specified fan-out angle, and wherein the divergence and fan-out angles are chosen so as to project the radiation onto a region in space in multiple adjacent instances of the diffraction pattern, which tile the region, and wherein the extreme diffraction orders of neighboring tiles are mutually adjacent in a spatial frequency space.