CPC F21V 5/004 (2013.01) [F21V 5/007 (2013.01); F21Y 2105/12 (2016.08); F21Y 2115/30 (2016.08)] | 21 Claims |
1. An optical device, comprising:
an array of light-emitting elements, comprising a first subset of light-emitting elements and a second subset of light-emitting elements,
wherein the first subset of light-emitting elements is configured to emit light having wavelength L1;
a high refractive index material selectively disposed on the second subset of light-emitting elements but not on the first subset of light-emitting elements; and
an array of optical elements positioned so as to be illuminated by the first subset of light-emitting elements and by the second subset of light-emitting elements,
wherein the optical elements are regularly arranged in a common plane at a pitch P, wherein the common plane is located a distance D from the array of light-emitting elements, and
wherein P2≈2L1D/N, N being an integer greater than or equal to 1.
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