US 11,815,680 B2
Optical system and method for providing expanded field of view
Giuseppe Calafiore, Woodinville, WA (US); Oleg Yaroshchuk, Kyiv (UA); and Barry David Silverstein, Kirkland, WA (US)
Assigned to META PLATFORMS TECHNOLOGIES, LLC, Menlo Park, CA (US)
Filed by Meta Platforms Technologies, LLC, Menlo Park, CA (US)
Filed on Aug. 31, 2022, as Appl. No. 17/900,540.
Application 17/900,540 is a continuation of application No. 17/137,530, filed on Dec. 30, 2020, granted, now 11,474,352.
Prior Publication US 2023/0004004 A1, Jan. 5, 2023
This patent is subject to a terminal disclaimer.
Int. Cl. G02B 27/01 (2006.01); G02B 5/18 (2006.01); G02B 27/42 (2006.01); G02B 27/00 (2006.01)
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
OG exemplary drawing
 
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.