| CPC G02B 5/208 (2013.01) [G02B 5/1809 (2013.01); G02B 5/201 (2013.01)] | 11 Claims |
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1. A waveguide display system configured for reduced rainbow artifacts, the waveguide display system comprising:
a rainbow artifact mitigation system, comprising:
a first angular dependent filter configured to receive environment light from an environment and to transmit the environment light according to one or more first angular transmission functions, the one or more first angular transmission functions defining light transmission for light of a first polarization as a function of incident angle for the first angular dependent filter, wherein the first angular dependent filter is configured to at least partially mitigate transmission of light of the first polarization for at least some incident angles above 40°, and wherein the first angular dependent filter is configured to at least partially transmit light of a second polarization for at least some incident angles above 40°; and
a polarization rotator configured to receive light output by the first angular dependent filter and rotate a polarization of received light, wherein the polarization rotator is configured to rotate a polarization of light of the second polarization to output light of a target polarization for at least some incident angles above 40°; and
a waveguide comprising a grating structure, the waveguide being configured to receive light output by the rainbow artifact mitigation system and to direct at least some received light toward an eye of a user, wherein the grating structure of the waveguide is configured for a weak interaction with light of the target polarization resulting in reduced diffraction of light of the target polarization by the grating structure for at least some incident angles above 40°, wherein the rainbow artifact mitigation system contributes to a mitigation or elimination of rainbow artifacts caused by the grating structure of the waveguide.
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