公开(公告)号：US11693265B2

公开(公告)日：2023-07-04

申请号：US17330422

申请日：2021-05-26

Applicant: Meta Platforms Technologies, LLC

Inventor： Hsien-Hui Cheng ,  Yang Zhao ,  Hannah Noble ,  Fenglin Peng ,  Lu Lu

IPC: G02F1/1347 ,  G02F1/01 ,  G02B27/01 ,  G02F1/139

CPC classification number: G02F1/0136 ,  G02B27/0172 ,  G02F1/139 ,  G02F1/1347 ,  G02B2027/0178

Abstract: A polarization modulator includes a first liquid crystal cell and a second liquid crystal cell. The first liquid crystal cell has a first type of liquid crystals configured to rotate an optical axis of light parallel to a first plane of the first liquid crystal cell. The second liquid crystal cell is configured to receive the light from the first liquid crystal cell. The second liquid crystal cell has a second type of liquid crystals configured to rotate the optical axis of the light perpendicular to a second plane of the second liquid crystal cell.

公开(公告)号：US11686942B2

公开(公告)日：2023-06-27

申请号：US16730293

申请日：2019-12-30

Applicant: Meta Platforms Technologies, LLC

Inventor： Yang Zhao ,  Afsoon Jamali ,  Junren Wang ,  Wai Sze Tiffany Lam ,  Lu Lu ,  Douglas Robert Lanman

IPC: G02F1/137 ,  G02B27/01 ,  G03B13/36

CPC classification number: G02B27/0172 ,  G02F1/13718 ,  G03B13/36

Abstract: A display system includes a source of unpolarized image light, and a stack of polarization-selective optical elements operable to switchably convert the unpolarized image light into two orthogonally polarized light beams, each of which being switchable in at least one beam characteristic. An output polarizer selects one of the two orthogonally polarized light beams for providing to a user. A depolarizer may be disposed between an electronic display emitting polarized light and the stack. The depolarizer may be in the form of an LC bilayer with randomized in-plane optic axis.

公开(公告)号：US12130450B1

公开(公告)日：2024-10-29

申请号：US17163150

申请日：2021-01-29

Applicant: META PLATFORMS TECHNOLOGIES, LLC

Inventor： Yang Zhao ,  Ying Geng ,  Jacques Gollier ,  Douglas Robert Lanman

IPC: G02B27/01 ,  G02B3/08 ,  G02B27/42

CPC classification number: G02B3/08 ,  G02B27/4211

Abstract: An optical assembly includes a Fresnel lens and a diffractive optical element. The Fresnel lens includes a high-refractive-index material having a refractive index greater than 1.9. The diffractive optical element is optically coupled with the Fresnel lens to compensate for chromatic aberration caused by the Fresnel lens. A method for imaging light with the optical assembly is also disclosed.

公开(公告)号：US20230393309A1

公开(公告)日：2023-12-07

申请号：US18192986

申请日：2023-03-30

Applicant: Meta Platforms Technologies, LLC

Inventor： Tingling Rao ,  Xingzhou Tu ,  Yang Zhao ,  Andrew John Ouderkirk ,  Ying Geng

IPC: G02B3/08 ,  G02B1/04 ,  G02B1/02

CPC classification number: G02B3/08 ,  G02B1/041 ,  G02B1/02 ,  G02B2003/0093

Abstract: A Fresnel lens includes a lens body having a structured surface with a plurality of facets, where the lens body includes an organic solid crystal having mutually-orthogonal refractive indices, nx, ny, nz. In a related vein, an apparatus includes a display and an optical configuration configured to receive display light from the display, where (a) the optical configuration includes a Fresnel lens assembly having a Fresnel lens and a Pancharatnam-Berry Phase lens overlying the Fresnel lens, (b) the Fresnel lens includes a lens body having a structured surface including a plurality of facets, and (c) the lens body includes an organic solid crystal.

公开(公告)号：US11604351B1

公开(公告)日：2023-03-14

申请号：US16878432

申请日：2020-05-19

Applicant: Meta Platforms Technologies, LLC

Inventor： Tamer Elazhary ,  Yang Zhao ,  Nicholas Daniel Trail ,  Byron Taylor

IPC: G02B27/01 ,  H04N13/363

Abstract: An optical assembly for a digital projector includes a lens and a field bias optical element. The lens is disposed to receive display light generated by a display and to direct the display light along an optical path. The lens is configured to provide a first field-of-view. The field bias optical element is disposed between the lens and an aperture stop of the optical assembly. The field bias optical element is configured to bias the display light in at least one direction to provide a second field-of-view that is greater than the first field-of-view.

公开(公告)号：US11567326B1

公开(公告)日：2023-01-31

申请号：US17085654

申请日：2020-10-30

Applicant: Meta Platforms Technologies, LLC

Inventor： Afsoon Jamali ,  Yang Zhao ,  Brian Wheelwright ,  Douglas Robert Lanman ,  Marina Zannoli ,  Ian Erkelens ,  Yusufu Njoni Bamaxam Sulai ,  Lu Lu ,  Jacques Gollier

IPC: G02B27/01 ,  G02C7/08 ,  G02F1/1343 ,  G02B27/00

Abstract: A device includes a light source configured to emit an image light. The device also includes an optical assembly configured to direct the image light to an eye-box of the device. The optical assembly includes a first optical element portion configured to focus a first portion of the image light propagating through the first optical element portion. The optical assembly also includes a second optical element portion configured to focus a second portion of the image light propagating through the second optical element portion. The second optical element portion includes a liquid crystal (“LC”) lens having an adjustable optical power.