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公开(公告)号：US11650429B2
公开(公告)日：2023-05-16
申请号：US17671348
申请日：2022-02-14
Applicant: Meta Platforms Technologies, LLC
Inventor： Junren Wang , Mengfei Wang , Yun-Han Lee , Yuge Huang , Lu Lu , Barry David Silverstein
CPC classification number: G02B27/286 , G02B5/1814 , G02B5/1833 , G02B5/3016 , G02B27/0172 , G02B27/30 , G02B2027/0123 , G02B2027/0138 , G02B2027/0178 , G02B2027/0187
Abstract: A polarization conversion device includes a geometric phase grating and an angular selective waveplate. The geometric phase grating includes a first liquid crystal layer and is configured to diffract a unpolarized or partially polarized incident light beam into a first light beam and a second light beam (e.g., in two different diffraction orders). The first light beam is characterized by a first polarization state and propagates in a first direction. The second light beam is characterized by a second polarization state and propagates in a second direction. The angular selective waveplate includes a second liquid crystal layer, and functions as a zero or full-wave plate for the first light beam incident in the first direction and a half-wave plate for the second light beam incident in the second direction.
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公开(公告)号：US11619815B2
公开(公告)日：2023-04-04
申请号：US16733092
申请日：2020-01-02
Applicant: META PLATFORMS TECHNOLOGIES, LLC
Inventor： Gang Li , Changwon Jang , Giseung Bang , Andrew Maimone , Mengfei Wang , Afsoon Jamali , Lu Lu , Hao Yu
IPC: G02B27/01
Abstract: An optical assembly includes a beam steering device and a holographic optical element. The beam steering device is switchable between different states including a first state and a second state. The beam steering device includes a first polarization-selective optical element and a first tunable optical retarder optically coupled with the first polarization-selective optical element. The holographic optical element is positioned relative to the beam steering device for receiving light from the beam steering device and projecting a first light pattern while the beam steering device is in the first state and a second light pattern distinct from the first light pattern while the beam steering device is in the second state.
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公开(公告)号：US12117687B1
公开(公告)日：2024-10-15
申请号：US18302556
申请日：2023-04-18
Applicant: Meta Platforms Technologies, LLC
Inventor： Hsien-Hui Cheng , Michael Escuti , Xiayu Feng , Mengfei Wang , Steven John Robbins , Zhexin Zhao , Lu Lu
IPC: G02F1/1335 , G02F1/13363 , G02F1/1337 , G02F1/137 , G03H1/02
CPC classification number: G02F1/133524 , G02F1/133507 , G02F1/13355 , G02F1/133636 , G02F1/133757 , G02F1/13706 , G03H1/0248
Abstract: A device is provided. The device includes a light guide configured to guide a first light propagating therein. The device also includes an optical film coupled with the light guide, optically anisotropic molecules in the optical film being configured with an in-plane orientation pattern having an in-plane pitch along the predetermined in-plane direction. Within the in-plane pitch of the in-plane orientation pattern, azimuthal angles of the optically anisotropic molecules are configured to vary nonlinearly along the predetermined in-plane direction. The optical film is configured to diffract the first light as a plurality of second lights at a plurality of locations of the optical film, with a plurality of predetermined, different diffraction efficiencies.
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公开(公告)号：US11860573B1
公开(公告)日：2024-01-02
申请号：US17229844
申请日：2021-04-13
Applicant: Meta Platforms Technologies, LLC
Inventor： Mengfei Wang , Junren Wang , Yun-Han Lee , Stephen Choi , Lu Lu , Barry David Silverstein
CPC classification number: G03H1/0402 , G02B27/286 , G03H1/0248 , G03H1/0465 , G03H2001/0216 , G03H2001/0413 , G03H2001/0439 , G03H2001/0441 , G03H2223/20 , G03H2223/22 , G03H2223/23 , G03H2223/24 , G03H2227/05
Abstract: A system includes a mask configured to forwardly diffract an input beam as a first set of two polarized beams. The system also includes a polarization conversion element configured to convert the first set of two polarized beams into a second set of two polarized beams having opposite handednesses. The two polarized beams having opposite handednesses interfere with one another to generate a polarization interference pattern.
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公开(公告)号：US11815853B2
公开(公告)日：2023-11-14
申请号：US17322453
申请日：2021-05-17
Applicant: Meta Platforms Technologies, LLC
Inventor： Hao Yu , Dianmin Lin , Lu Lu , Xiayu Feng , Mengfei Wang , Barry David Silverstein
CPC classification number: G03H1/0248 , G02B27/0025 , G02B27/0172 , G03H1/18 , G02B2027/0174 , G02B2027/0178 , G03H2001/185
Abstract: An optical device includes an optical component (e.g., a polarization volume hologram, a geometric phase device, or a polarization-insensitive diffractive optical element) having a uniform thickness and configured to modify a wavefront of a light beam that includes light in two or more wavelengths visible to human eyes, where the optical component has a chromatic aberration between the two or more wavelengths. The optical device also includes a metasurface on the optical component. The metasurface includes a plurality of nanostructures configured to modify respective phases of incident light at a plurality of regions of the metasurface, where the plurality of nanostructures is configured to, at each region of the plurality of regions, add a respective phase delay for each of the two or more wavelengths to correct the chromatic aberration between the two or more wavelengths.
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Patent Agency Ranking
公开(公告)号：US11675188B2
公开(公告)日：2023-06-13
申请号：US17474362
申请日：2021-09-14
Applicant: Meta Platforms Technologies, LLC
Inventor： Yun-Han Lee , Lu Lu , Mengfei Wang , Fenglin Peng , Junren Wang
CPC classification number: G02B27/0037 , G02B5/32 , G02B27/0172 , G02B27/0179 , G03H1/0248 , G02B2027/0109 , G02B2027/0116 , G02B2027/0174 , G02B2027/0178 , G02B2027/0187 , G03H2001/0264
Abstract: A system is provided. The system includes a light source configured to emit an infrared light to illuminate an eye of a user. The system includes a grating disposed facing the eye and including a birefringent material film configured with a uniform birefringence lower than or equal to 0.1. The grating is configured to diffract the infrared light reflected from the eye, and transmit a visible light from a real world environment toward the eye, with a diffraction efficiency less than a predetermined threshold. The system includes an optical sensor configured to receive the diffracted infrared light and generate an image of the eye based on the diffracted infrared light.
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公开(公告)号：US11635669B1
公开(公告)日：2023-04-25
申请号：US17005247
申请日：2020-08-27
Applicant: Meta Platforms Technologies, LLC
Inventor： Lu Lu , Hao Yu , Mengfei Wang , Junren Wang , Yun-Han Lee , Nicholas John Diorio , Barry David Silverstein
IPC: G02F1/29 , G02F1/1337
Abstract: A device includes a first substrate and a second substrate. The device also includes a birefringent medium layer disposed between the first substrate and the second substrate. Orientations of directors of optically anisotropic molecules included in the birefringent medium layer varying periodically with an in-plane pitch tunable by an external field to adjust a diffraction angle of a light beam diffracted by the birefringent medium layer.
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公开(公告)号：US11579425B1
公开(公告)日：2023-02-14
申请号：US16848652
申请日：2020-04-14
Applicant: META PLATFORMS TECHNOLOGIES, LLC
Inventor： Ying Geng , Brian Wheelwright , Jacques Gollier , Yusufu Njoni Bamaxam Sulai , Babak Amirsolaimani , Weichuan Gao , Gang Li , Mengfei Wang , Fenglin Peng
Abstract: An optical assembly includes at least one substrate that provides a first curved surface and a second surface. The optical assembly also includes a beam splitter on the first curved surface, a reflector on the second surface, and an optical retarder disposed between the beam splitter and the reflector. The optical assembly is configured to transmit the first light through the optical assembly at a first optical power. The optical assembly is also configured to transmit second light through peripheral portions of the optical assembly at a second optical power that is less than the first optical power. The first light includes light having a first polarization and wavelengths within a predetermined wavelength range. The second light includes light having wavelengths within the predetermined wavelength range and a second polarization orthogonal to the first polarization, as well as light having wavelengths outside the predetermined wavelength range.
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公开(公告)号：US12204136B2
公开(公告)日：2025-01-21
申请号：US17901851
申请日：2022-09-02
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
Abstract: A device includes a display configured to generate an image light. The device also includes a waveguide optically coupled with the display and configured to guide the image light to an exit pupil of the device. The waveguide includes a grating including a birefringent material, and a birefringence of the grating is configured to increase along a pupil-expanding direction of the device.
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公开(公告)号：US11933995B1
公开(公告)日：2024-03-19
申请号：US17719303
申请日：2022-04-12
Applicant: META PLATFORMS TECHNOLOGIES, LLC
Inventor： Mengfei Wang , Gang Li , Lu Lu , Yunqi Li
IPC: G02B27/01 , G02B5/02 , G02B27/28 , G02F1/13357
CPC classification number: G02B5/0278 , G02B27/0172 , G02B27/286 , G02F1/13362 , G02B2027/0174 , G02B2027/0178
Abstract: An optical diffuser includes optically anisotropic molecules arranged in a predefined configuration such that the optical diffuser diffuses first light having a first polarization and transmits second light having a second polarization that is different from the first polarization upon receiving the second light. In addition to polarization selectivity, the optical diffuser may also exhibit wavelength selectivity and/or incident angle selectivity. A method of diffusing light using the optical diffuser and a method of making the optical diffuser are also disclosed.
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