公开(公告)号：US11874474B1

公开(公告)日：2024-01-16

申请号：US17018579

申请日：2020-09-11

Applicant: Meta Platforms Technologies, LLC

Inventor： Yun-Han Lee ,  Mengfei Wang ,  Junren Wang ,  Lu Lu ,  Robin Sharma ,  Gregory Olegovic Andreev ,  Garam Young ,  Andrew John Ouderkirk ,  Babak Amirsolaimani ,  Fenglin Peng ,  Barry David Silverstein

IPC: G02B27/01 ,  G02B27/42 ,  G02B27/28 ,  G02F1/31 ,  H04N23/55 ,  H04N23/75

CPC classification number: G02B27/0179 ,  G02B27/0172 ,  G02B27/283 ,  G02B27/286 ,  G02B27/4205 ,  G02F1/31 ,  H04N23/55 ,  H04N23/75 ,  G02B2027/011 ,  G02B2027/0138 ,  G02B2027/0187 ,  G02F2203/01 ,  G02F2203/07 ,  G02F2203/24

Abstract: A system includes a diffractive optical element including at least one substrate and a grating structure. The grating structure is configured to diffract a first light having an incidence angle within a predetermined range, and the at least one substrate is configured to reflect a second light. The system also includes a polarization selective mechanism configured to generate images based on the first light and the second light, respectively.

公开(公告)号：US11592608B2

公开(公告)日：2023-02-28

申请号：US16734163

申请日：2020-01-03

Applicant: META PLATFORMS TECHNOLOGIES, LLC

Inventor： Fenglin Peng ,  Ying Geng ,  Jacques Gollier ,  Garam Young

IPC: F21V8/00 ,  G02B27/28 ,  G02F1/139 ,  G02B27/01 ,  G02F1/01

Abstract: An optical device for illuminating one or more portions of a spatial light modulator includes a waveguide, an array of tunable retarders, and a polarization selective optical element. A respective tunable retarder is optically coupled to receive light from the waveguide. The respective tunable retarder has a first state, which causes the respective tunable retarder to direct light having a first polarization in a first direction, and a second state, which causes the respective tunable retarder to direct light having a second polarization distinct from the first polarization in the first direction. The polarization selective optical element is located adjacent to the array of tunable retarders so that the light having the first polarization propagates from the polarization selective optical element in a second direction and the light having the second polarization propagates from the polarization selective optical element in a third direction distinct from the second direction.

公开(公告)号：US11467332B2

公开(公告)日：2022-10-11

申请号：US16734167

申请日：2020-01-03

Applicant: META PLATFORMS TECHNOLOGIES, LLC

Inventor： Fenglin Peng ,  Ying Geng ,  Jacques Gollier ,  Garam Young

IPC: G02B6/00 ,  F21V8/00 ,  G02F1/01 ,  G02B27/01 ,  G02B27/28 ,  G02F1/139

Abstract: A display device includes a waveguide, an array of tunable retarders in contact with the waveguide, and a polarization selective optical element. A respective tunable retarder of the array of tunable retarders receives light from the waveguide. The respective tunable retarder has a first state, which causes the respective tunable retarder to direct light having a first polarization in a first direction and a second state, which causes the respective tunable retarder to direct light having a second polarization that is distinct from the second polarization in the first direction. The polarization selective optical element is located adjacent to the array of tunable retarders so that the light having the second polarization propagates from the polarization selective optical element in a second direction and the light having the second polarization propagates from the polarization selective optical element in a third direction distinct from the second direction.