CPC G02B 27/0101 (2013.01) [G02B 5/18 (2013.01); G02B 5/1828 (2013.01); G02B 27/0081 (2013.01); G02B 27/0172 (2013.01); G02B 27/4272 (2013.01); G02B 2027/0123 (2013.01); G02B 2027/0159 (2013.01)] | 19 Claims |
1. A device, comprising:
a waveguide; and
a plurality of grating sets coupled with the waveguide,
wherein a first grating set of the plurality of grating sets is configured to couple, during a first time period, a first input image light into and out of the waveguide as a first output image light, and a first vector sum of in-plane projections of grating vectors associated with all gratings included in the first grating set is a first non-null vector,
wherein a second grating set of the plurality of grating sets is configured to couple, during a second time period, a second input image light into and out of the waveguide as a second output image light, and a second vector sum of in-plane projections of grating vectors associated with all gratings included in the second grating set is a second non-null vector,
wherein a third grating set of the plurality of grating sets is configured to couple, during a third time period, a third input image light into and out of the waveguide as a third output image light, and a third vector sum of in-plane projections of grating vectors associated with all gratings included in the third grating set is a null vector, and
wherein the first vector sum and the second vector sum have different directions.
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