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：US11619774B2

公开(公告)日：2023-04-04

申请号：US17383245

申请日：2021-07-22

Applicant: META PLATFORMS TECHNOLOGIES, LLC

Inventor： Jacques Gollier ,  Fenglin Peng ,  Alexander Koshelev ,  Giuseppe Calafiore ,  Lu Lu ,  Ying Geng ,  Yun-Han Lee

IPC: G02B5/32 ,  F21V8/00 ,  G02B6/12 ,  G02B27/09 ,  G02B6/124 ,  G02B6/125 ,  G02B27/01 ,  G02B5/18

Abstract: An illuminator for a display panel includes a light source for providing a light beam and a lightguide coupled to the light source for receiving and propagating the light beam along the substrate. The lightguide includes an array of out-coupling gratings that runs parallel to the array of pixels for out-coupling portions of the light beam from the lightguide such that the out-coupled light beam portions propagate through the substrate and produce an array of optical power density peaks at the array of pixels due to Talbot effect. A period of the array of peaks is an integer multiple of a pitch of the array of pixels.

公开(公告)号：US11579511B2

公开(公告)日：2023-02-14

申请号：US17399735

申请日：2021-08-11

Applicant: Meta Platforms Technologies, LLC

Inventor： Oleg Yaroshchuk ,  Junren Wang ,  Lu Lu

IPC: G02F1/29 ,  G02B27/01

Abstract: A device is provided. The device includes a first lens assembly controllable to switch between a first plurality of optical powers. The first lens assembly includes a plurality of directly optically coupled lenses, and is configured to converge or diverge a light transmitted therethrough. The device also includes a second lens assembly coupled with the first lens assembly, and controllable to switch between a second plurality of optical powers that are opposite to the first plurality of optical powers.

公开(公告)号：US20230037261A1

公开(公告)日：2023-02-02

申请号：US17865223

申请日：2022-07-14

Applicant: Meta Platforms Technologies, LLC

Inventor： Qing Chao ,  Lu Lu ,  Xinqiao Liu ,  Hao Yu ,  Junren Wang

IPC: H04N5/33 ,  G02B5/32 ,  G02B3/00 ,  G02B5/20

Abstract: Imaging systems, cameras, and image sensors of this disclosure include imaging pixels that include subpixels. Diffractive optical elements such as a metasurface lens layers or a liquid crystal polarization hologram (LCPH) are configured to focus image light to the subpixels of the imaging pixels.

公开(公告)号：US11467331B1

公开(公告)日：2022-10-11

申请号：US16666823

申请日：2019-10-29

Applicant: Meta Platforms Technologies, LLC

Inventor： Yun-Han Lee ,  Lu Lu ,  Mengfei Wang ,  Fenglin Peng ,  Junren Wang ,  Oleg Yaroshchuk ,  Yingfei Jiang ,  Babak Amirsolaimani ,  Scott Charles Mceldowney

IPC: G03H1/02 ,  G02B27/01 ,  F21V8/00

Abstract: An optical device includes a display configured to generate an image light; and a waveguide optically coupled with the display and configured to guide the image light to an exit pupil of the optical device. The waveguide includes an in-coupling element configured to couple the image light into the waveguide, and an out-coupling element configured to decouple the image light out of the waveguide. The out-coupling element includes a grating having a diffraction efficiency gradient along a predetermined direction at a plane of the grating.

公开(公告)号：US11422409B2

公开(公告)日：2022-08-23

申请号：US16851874

申请日：2020-04-17

Applicant: Meta Platforms Technologies, LLC

Inventor： Jacques Gollier ,  Fenglin Peng ,  Junren Wang ,  Lu Lu

IPC: G02F1/13363 ,  G02B5/30

Abstract: An optical waveplate is provided. The optical waveplate includes a first birefringent film including optically anisotropic molecules arranged to form a first twist structure. The optical waveplate also includes a second birefringent film including optically anisotropic molecules arranged to form a second twist structure, the second birefringent film being stacked with the first birefringent film. The optically anisotropic molecules at a first portion of the first birefringent film adjacent an interface between the first birefringent film and the second birefringent film are configured with a first azimuthal angle. The optically anisotropic molecules at a second portion of the second birefringent film adjacent the interface are configured with a second azimuthal angle. The first azimuthal angle is substantially the same as the second azimuthal angle.