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公开(公告)号：US11598919B2
公开(公告)日：2023-03-07
申请号：US17063190
申请日：2020-10-05
Applicant: Meta Platforms Technologies, LLC
Inventor： Yingfei Jiang , Lu Lu , Hao Yu
Abstract: An optical assembly may include a waveguide and a Bragg grating configured to couple light into or out of the waveguide. The Bragg grating may include a plurality of layer pairs, wherein at least one layer pair comprises a first material having a first refractive index and a second layer having a second refractive index, and wherein properties of the Bragg grating are selected so that the Bragg grating exhibits a substantially similar diffractive efficiency and diffraction angle for light of at least two colors.
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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.
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公开(公告)号：US11561507B2
公开(公告)日：2023-01-24
申请号：US16273068
申请日：2019-02-11
Applicant: META PLATFORMS TECHNOLOGIES, LLC
Inventor： Oleg Yaroshchuk , Wai Sze Tiffany Lam , Scott Charles McEldowney , Lu Lu
Abstract: The invention relates to a method of creation of three-dimensional alignment patterns that includes providing a layer of optically recordable and polarization sensitive material having a thickness that is greater than, or equal to, a predefined thickness, and concurrently illuminating the optically recordable medium with two coherent beam of same or different polarization with predetermined angle between the beams such that the said beams impinge from the same side or from the opposite sides upon the layer of the recordable material. The invention further relates to polarization volume holograms based on the said alignment patterns and polarization holographic element including a single layer or a stack of several layers of optically recordable materials containing single or multiple polarization volume holograms.
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公开(公告)号：US20250164695A1
公开(公告)日：2025-05-22
申请号：US18785679
申请日：2024-07-26
Applicant: Meta Platforms Technologies, LLC
Inventor： Prathmesh Deshmukh , Tingling Rao , Zhaoyu Nie , Andrew John Ouderkirk , Jie Li , Yuanrui Li , Jianji Yang , Zhenye Li , Sawyer Miller , Xuan Wang , Joshua Cobb , Hsien-Hui Cheng , Eugene Cho , Robin Sharma , Eric Stratton , Ajit Ninan , Zhexin Zhao , Xiayu Feng , Yun-Han Lee , Michael Escuti , Steven John Robbins , Babak Amirsolaimani , Lu Lu , Barry David Silverstein
Abstract: An optical element includes a waveguide body that is configured to guide light by total internal reflection from an input end to an output end, an input coupling element located at the input end for coupling light into the waveguide body, and an output coupling element located at the output end for coupling light out of the waveguide body, where the waveguide body includes an organic solid crystal. The organic solid crystal may be a single crystal having principal axes rotated with respect to the dimensions of the waveguide body. Such an optical element may have low weight and exhibit good color uniformity while providing polarization scrambling of the guided light.
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公开(公告)号：US12274125B2
公开(公告)日：2025-04-08
申请号：US17680272
申请日：2022-02-24
Applicant: Meta Platforms Technologies, LLC
Inventor： Yuge Huang , Lu Lu
Abstract: A display is provided. The display includes a plurality of light-emitting elements configured to emit a first light associated with a first predetermined wavelength band. The display also includes an optical assembly including a reflective polarizer, a color conversion layer, and a color filter layer. The optical assembly is configured to at least partially convert the first light associated with the first predetermined wavelength band into a second light associated with a second predetermined wavelength band, the second light being a polarized light of a predetermined polarization.
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Patent Agency Ranking
公开(公告)号：US12231749B2
公开(公告)日：2025-02-18
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
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.
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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：US12001017B1
公开(公告)日：2024-06-04
申请号：US17672654
申请日：2022-02-15
Applicant: Meta Platforms Technologies, LLC
Inventor： Yun-Han Lee , Yu Shi , Lu Lu , Scott Charles McEldowney
CPC classification number: G02B27/0093 , G02B27/0172 , G06F3/013 , G02B2027/0138 , G02B2027/014
Abstract: An illumination system includes a light source configured to emit an infrared light. The illumination system also includes a substrate and a plurality of light deflecting elements coupled with the substrate and configured to deflect the infrared light to illuminate an object.
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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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公开(公告)号：US11852949B1
公开(公告)日：2023-12-26
申请号：US17176863
申请日：2021-02-16
Applicant: META PLATFORMS TECHNOLOGIES, LLC
Inventor： Lu Lu , Wai Sze Tiffany Lam , Yusufu Njoni Bamaxam Sulai
IPC: G02F1/29
CPC classification number: G02F1/29 , G02F1/294 , G02F2202/40 , G02F2203/28
Abstract: A hybrid lens is disclosed including optically coupled varifocal lens and adaptive lens. The varifocal lens is configured for varying optical power of the hybrid lens, and an adaptive lens includes a voltage-controlled element for varying optical power of the adaptive lens in coordination with varying the optical power of the varifocal lens and responsive to variation of the optical power of the hybrid lens, for lessening an optical aberration of the hybrid lens. The hybrid lens may be used in head-mounted displays e.g. for lessening a vergence-accommodation conflict.
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