公开(公告)号：US12235458B2

公开(公告)日：2025-02-25

申请号：US18734641

申请日：2024-06-05

Applicant: Meta Platforms Technologies, LLC

Inventor： Afsoon Jamali ,  Changwon Jang ,  Sandro Pintz

IPC: G02B27/01 ,  G02B3/14 ,  G02B5/30 ,  G02B26/00

Abstract: A varifocal liquid lens includes a body filled with two different fluids separated by an interface of a variable curvature across a clear aperture of the varifocal liquid lens. At least one of the first or second fluids is birefringent, such that a refractive index difference between the first and second fluids and resulting optical power of the varifocal liquid lens is dependent on polarization of impinging light. At a first light polarization, the first and second fluids may be matched in refractive index, while at a second, orthogonal light polarization, the first and second fluids may be mismatched in refractive index, whereby the first interface between the first and second fluids may have a variable, non-zero optical power for the second polarization while having a substantially non-variable, zero optical power for the first polarization of light.

公开(公告)号：US20240168284A1

公开(公告)日：2024-05-23

申请号：US18105225

申请日：2023-02-02

Applicant: Meta Platforms Technologies, LLC

Inventor： Changwon Jang ,  Afsoon Jamali ,  Zhimin Shi

IPC: G02B27/00 ,  G02B27/01 ,  G02F1/1335 ,  G03H1/22 ,  G06F1/16

CPC classification number: G02B27/0093 ,  G02B27/0172 ,  G02F1/1335 ,  G03H1/2286 ,  G03H1/2294 ,  G06F1/163 ,  G03H2001/0224 ,  G03H2223/23 ,  G03H2223/24 ,  G03H2225/34

Abstract: A holographic display includes an illuminator, a spatial light modulator (SLM) coupled to the illuminator, a beam redirector and an ocular lens coupled to the SLM. A controller is operably coupled to the SLM and the beam redirector and configured to provide exit pupils at eyebox locations where a holographic image may be observed. The exit pupils provided in a time-sequential manner, forming a grid of exit pupils/eyebox locations. An eye tracking system may be used to center the grid around the current eye pupil position, to provide a larger overall eyebox for viewing the holographically generated image.

公开(公告)号：US20230204964A1

公开(公告)日：2023-06-29

申请号：US18179099

申请日：2023-03-06

Applicant: Meta Platforms Technologies, LLC

Inventor： Afsoon Jamali ,  Gang Li ,  Changwon Jang

IPC: G02B27/01 ,  G02F1/137 ,  G02B15/16 ,  G02B27/00 ,  G02B5/30

CPC classification number: G02B27/0172 ,  G02F1/13718 ,  G02B15/16 ,  G02B27/0025 ,  G02B5/3083 ,  G02B2027/0178 ,  G02B5/3016 ,  G02F1/294

Abstract: A freeform varifocal optical assembly includes at least three optical modules including a first plurality of polarization sensitive optical elements including Pancharatnam-Berry phase (PBP) lenses, polarization sensitive hologram (PSH) lenses, metamaterials, or combinations thereof. The plurality of polarization sensitive optical elements of each optical module include a property associated with a Zernike polynomial. Each of the first and the three optical modules are configurable between a plurality of optical powers. The freeform varifocal optical assembly is configurable to output a predetermined wavefront in response to an input wavefront.

公开(公告)号：US11803077B2

公开(公告)日：2023-10-31

申请号：US17173177

申请日：2021-02-10

Applicant: Meta Platforms Technologies, LLC

Inventor： Afsoon Jamali ,  Changwon Jang ,  Sandro Pintz

IPC: G02F1/1335 ,  G02F1/1343

CPC classification number: G02F1/133512 ,  G02F1/133526 ,  G02F1/134309

Abstract: A device includes a liquid crystal (“LC”) layer having a gradient refractive index distribution. The device also includes an electrode layer coupled to the LC layer. The electrode layer includes a plurality of electrodes separated by one or more gaps masked by a light shielding material.

公开(公告)号：US11662582B2

公开(公告)日：2023-05-30

申请号：US16996398

申请日：2020-08-18

Applicant: Meta Platforms Technologies, LLC

Inventor： Gang Li ,  Yang Zhao ,  Changwon Jang ,  Weichuan Gao

IPC: G02B27/01 ,  G02B5/32 ,  G03H1/22

CPC classification number: G02B27/0172 ,  G02B5/32 ,  G03H1/2205 ,  G02B2027/0174 ,  G02B2027/0178 ,  G03H2001/2231

Abstract: A display device includes an image source, a holographic relay, and a holographic image combiner in an off-axis configuration. The holographic relay may include a pair of freeform holographic reflectors relaying light of the image source to an intermediate image plane. The holographic image combiner receives and redirects the relayed light from the holographic relay, forming an image in angular domain at an eyebox of the display device, the image in angular domain corresponding to the image in linear domain generated by the image source.

公开(公告)号：US20240168433A1

公开(公告)日：2024-05-23

申请号：US18105223

申请日：2023-02-02

Applicant: Meta Platforms Technologies, LLC

Inventor： Changwon Jang ,  Afsoon Jamali ,  Zhimin Shi

IPC: G03H1/22 ,  G02B27/00 ,  G02B27/01 ,  G02F1/1335 ,  G06F1/16

CPC classification number: G03H1/2286 ,  G02B27/0093 ,  G02B27/0172 ,  G02F1/1335 ,  G03H1/2294 ,  G06F1/163 ,  G02B2027/0174 ,  G03H2001/0224 ,  G03H2223/16 ,  G03H2223/23 ,  G03H2223/24 ,  G03H2225/34

Abstract: A holographic display includes an illuminator, a spatial light modulator (SLM) coupled to the illuminator, and an ocular lens coupled to the SLM. The illuminator provides a wide-area illuminating light beam to illuminate the SLM with a spatially homogeneous beam of light. The illuminator may include a slab waveguide with an evanescent out-coupler, or a beam expander based on a diffraction grating with an oblique angle of incidence and a near-normal angle of diffraction of the illuminating light. A low-pass spatial filter may be provided to filter out higher diffraction orders of the illuminating light diffracted on the SLM.

公开(公告)号：US20240168290A1

公开(公告)日：2024-05-23

申请号：US18105218

申请日：2023-02-02

Applicant: Meta Platforms Technologies, LLC

Inventor： Changwon Jang ,  Afsoon Jamali ,  Zhimin Shi

IPC: G02B27/01 ,  G02F1/1335 ,  G02F1/1343 ,  G03H1/22 ,  G06F1/16

CPC classification number: G02B27/0172 ,  G02F1/1335 ,  G02F1/134363 ,  G03H1/2286 ,  G03H1/2294 ,  G06F1/163 ,  G02B27/0093 ,  G02B2027/0174

Abstract: A holographic display includes an illuminator, a spatial light modulator (SLM) coupled to the illuminator, and an ocular lens coupled to the SLM. The SLM includes sequentially coupled first and second pixelated SLM panels for spatially modulating the illuminating light beam in amplitude and phase. At least one of the SLM panels may include a liquid crystal (LC) panel, such as an in-plane switching (IPS) panel. At least one of the SLM panels may include an array of piston-type micromirrors.

公开(公告)号：US20240126134A1

公开(公告)日：2024-04-18

申请号：US18485498

申请日：2023-10-12

Applicant: Meta Platforms Technologies, LLC

Inventor： Afsoon Jamali ,  Changwon Jang ,  Zhimin Shi ,  Sho Nakahara ,  Eric Stratton

IPC: G02F1/29

CPC classification number: G02F1/29 ,  G02F2201/122

Abstract: The disclosed system may include at least one gradient-index liquid crystal lens. The system may include a selection module that selects a viewing angle. The system may also include an adjustment module that dynamically adjusts a phase reset property of the gradient-index liquid crystal lens in response to the selected viewing angle. Various other devices, systems, and methods are also disclosed.

公开(公告)号：US12259553B2

公开(公告)日：2025-03-25

申请号：US17666227

申请日：2022-02-07

Applicant: META PLATFORMS TECHNOLOGIES, LLC

Inventor： Miaomiao Xu ,  Brian Wheelwright ,  Fenglin Peng ,  Ying Geng ,  Changwon Jang ,  Maxwell Parsons ,  Sihui He ,  Jacques Gollier

IPC: G02B27/01 ,  G02B27/14 ,  G02B27/28

Abstract: An illuminator for illuminating a display panel includes a lightguide with an array of buried slanted bulk reflectors that out-couple portions of the light beam propagating in the lightguide through one of the lightguide surfaces. Polarization beam-splitting slanted surfaces may be used to provide polarized output. Such an illuminator may be used with a reflective display panel operating by polarization. The beam-splitting slanted surfaces operate as a polarizer, providing polarized illuminating light. The light reflected by the reflective panel may propagate back through the illuminator, and the polarization beam-splitting slanted surfaces may operate also as analyzer.

公开(公告)号：US20240264442A1

公开(公告)日：2024-08-08

申请号：US18512560

申请日：2023-11-17

Applicant: Meta Platforms Technologies, LLC

Inventor： Afsoon Jamali ,  Robin Sharma ,  Changwon Jang ,  Dmytro Y Reznikov

IPC: G02B27/01 ,  G02B3/00 ,  G02B3/08 ,  G02B27/28

CPC classification number: G02B27/0172 ,  G02B3/0087 ,  G02B3/08 ,  G02B27/28 ,  G02B2027/0178

Abstract: A display device may include a display screen having a plurality of light emitting elements and a lens system that receives light emitted from the display screen. The lens system may include a lens having a liquid crystal module, an incident side surface on a first side of the liquid crystal module, and an exit side surface on a second side of the liquid crystal module, wherein at least one of the incident side surface and the exit side surface comprises a curved surface. Various other devices, systems, and methods are also disclosed.