Optical pattern projection

摘要

Optical apparatus includes first and second diffractive optical elements (DOEs) arranged in series to diffract an input beam of radiation. The first DOE is configured to apply to the input beam a pattern with a specified divergence angle, while the second DOE is configured to split the input beam into a matrix of output beams with a specified fan-out angle. 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 pattern.

主权项

1. Optical apparatus, comprising first and second diffractive optical elements (DOEs) arranged in series to diffract an input beam of radiation,
wherein the second DOE is configured to diffract the input beam so as to generate a plurality of separate output beams at different, respective beam angles relative to the input beam, while the first DOE is configured to apply a diffractive effect to the plurality of separate output beams so as to generate a respective plurality of diffraction patterns at the respective beam angles, and wherein each of the diffraction patterns comprises a set of spots corresponding to respective diffraction orders of a corresponding one of the output beams and projects a respective diffraction image comprising the spots onto a region in space, such that the diffraction patterns together tile the region so as to fill the region with no significant overlaps and with no significant gaps between diffraction patterns.