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公开(公告)号：WO2021061383A1
公开(公告)日：2021-04-01
申请号：PCT/US2020/049604
申请日：2020-09-06
Applicant: FACEBOOK TECHNOLOGIES, LLC
Inventor： JAMALI, Afsoon , ZHAO, Yang , LAM, Wai Sze Tiffany , LU, Lu , LANMAN, Douglas, Robert
Abstract: A volumetric display may include a two-dimensional display; a varifocal optical system configured to receive image light from the two-dimensional display and focus the image light; and at least one processor configured to: control the two-dimensional display to cause a plurality of sub-frames associated with an image frame to be displayed by the display, wherein each sub-frame of the plurality of sub-frames includes a corresponding portion of image data associated with the image frame; and control the varifocal optical system to a corresponding focal state for each respective sub-frame.
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公开(公告)号：WO2021076244A1
公开(公告)日：2021-04-22
申请号：PCT/US2020/049618
申请日：2020-09-07
Applicant: FACEBOOK TECHNOLOGIES, LLC
Inventor： JIANG, Yingfei , JAMALI, Afsoon , JANG, Changwon , TRAVIS, Adrian , MAIMONE, Andrew , LU, Lu
Abstract: A liquid crystal (LC) mixture for a pitch variable optical element is provided. The LC mixture includes a host LC and one or more LC dimers dissolved as a guest in the host LC. The host LC and the one or more LC dimers have respective dielectric anisotropies of opposite signs in nematic phase. A net dielectric anisotropy of the LC mixture is substantially neutral.
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公开(公告)号：WO2021067004A1
公开(公告)日：2021-04-08
申请号：PCT/US2020/049612
申请日：2020-09-07
Applicant: FACEBOOK TECHNOLOGIES, LLC
Inventor： SEARS, Jasmine Soria , JAMALI, Afsoon , LEE, Yun-Han
IPC: G02F1/137 , G02C7/10 , G02B5/23 , B32B17/10 , G02F1/1333
Abstract: An optical element (200) includes a first boundary layer (220) and a second boundary layer (240). A solution (230) is disposed between the first boundary layer and the second boundary layer. The solution includes liquid crystals (235) co-mingled with oblong photochromic dye molecules (233).
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公开(公告)号：WO2021050338A1
公开(公告)日：2021-03-18
申请号：PCT/US2020/049086
申请日：2020-09-02
Applicant: FACEBOOK TECHNOLOGIES, LLC
Inventor： ZHAO, Yang , PENG, Fenglin , WANG, Junren , JAMALI, Afsoon , LU, Lu , LANMAN,, Douglas Robert
IPC: G02F1/1347 , G02B6/27
Abstract: A first type of stacked LC structure (1000) includes at least two liquid crystal (LC) cells (1005a, 1005b) arranged in optical series that share a common substrate (1012) between adjacent LC cells. A second type of stacked LC structure (900) includes at least two LC cells (905a, 905b) arranged in optical series that share a common electrode layer (918) between adjacent LC cells. An optical assembly for use in a head mounted display (HMD) may include one or more stacked LC structures configured to transmit light in successive optical stages to provide a varifocal optical display assembly having adjustable optical power. By sharing a common substrate or a common electrode layer between adjacent LC cells, the total thickness of a stacked LC structure may be reduced, which may lead to a corresponding reduction in size and weight and improvement in user comfort for an HMD.
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公开(公告)号：WO2022140247A1
公开(公告)日：2022-06-30
申请号：PCT/US2021/064329
申请日：2021-12-20
Applicant: FACEBOOK TECHNOLOGIES, LLC
Inventor： JAMALI, Afsoon , JANG, Changwon
Abstract: A device includes a stack of a lens assembly and a steering assembly. The stack is configured to receive a beam from a first side and output the beam from a second side. The lens assembly is configured to provide an adjustable optical power to the beam. The steering assembly is configured to provide an adjustable steering angle to the beam. The device also includes a reflector configured to receive the beam output from the second side of the stack, and reflect the beam back to the second side of the stack. The beam reflected back from the reflector is incident onto the second side of the stack, and output from the first side of the stack.
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Patent Agency Ranking
公开(公告)号：WO2021150308A1
公开(公告)日：2021-07-29
申请号：PCT/US2020/062529
申请日：2020-11-29
Applicant: FACEBOOK TECHNOLOGIES, LLC
Inventor： JAMALI, Afsoon , LI, Gang , JANG, Changwon
IPC: G02B13/14 , G02B27/01 , G02F1/29 , G02B15/16 , G02B2027/0178 , G02B27/0172 , G02F1/13718
Abstract: A freeform varifocal optical assembly includes at least three optical modules including a first plurality of optical elements including Pancharatnam-Berry phase (PBP) lenses, polarization sensitive hologram (PSH) lenses, metamaterials, or combinations thereof. The plurality of 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.
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公开(公告)号：WO2021050183A1
公开(公告)日：2021-03-18
申请号：PCT/US2020/045536
申请日：2020-08-08
Applicant: FACEBOOK TECHNOLOGIES, LLC
Inventor： ZHAO, Yang , JAMALI, Afsoon , WANG, Junren , LAM, Wai Sze Tiffany , LU, Lu , LANMAN, Douglas Robert
IPC: G02B27/01
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.
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8.发明申请
公开(公告)号：WO2020112527A1
公开(公告)日：2020-06-04
申请号：PCT/US2019/062751
申请日：2019-11-22
Applicant: FACEBOOK TECHNOLOGIES, LLC
Inventor： JAMALI, Afsoon , MOHEGHI, Alireza , MAIMONE, Andrew , LANMAN, Douglas, Robert , MCELDOWNEY, Scott, Charles , LU, Lu , LAM, Wai Sze, Tiffany
Abstract: A near eye display (NED) includes an electronic display configured to output image light. Further, the NED includes an eye tracking module and multiple optical elements that are combined to form an optical system to allow for changes in position of one or both eyes of a user of the NED. Various types of such optical elements, which may have optical states that are switchable, may be used to steer a light beam toward the user's eye. A direction of the steering may be based on eye tracking information measured by the eye tracking module.
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公开(公告)号：WO2021236320A1
公开(公告)日：2021-11-25
申请号：PCT/US2021/030381
申请日：2021-05-02
Applicant: FACEBOOK TECHNOLOGIES, LLC
Inventor： LI, Gang , BANG, Kiseung , MAIMONE, Andrew , JANG, Changwon , WANG, Mengfei , JAMALI, Afsoon , WANG, Junren
IPC: G03H1/04 , G02B27/42 , G02B5/18 , G02F1/1347 , G02F1/29
Abstract: A holographic recording system includes a linear translation stage configured to position a holographic material layer, a light source configured to emit a laser beam, a beam splitting subsystem configured to split the laser beam into a first light beam and a second light beam and direct the second light beam towards the holographic material layer, a spatial-light modulator configured to implement a fringe pattern that modulates the first light beam to generate an object beam, a filter configured to filter the object beam, a demagnification optical subsystem configured to demagnify the object beam, and a switchable grating stack configurable to direct the object beam to a set of directions towards the holographic material layer to interfere with the second light beam. In some embodimetns, the switchable grating stack includes a plurality of polarization gratings and/or a plurality of switchable waveplates arranged in a stack.
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公开(公告)号：WO2021076243A1
公开(公告)日：2021-04-22
申请号：PCT/US2020/049611
申请日：2020-09-06
Applicant: FACEBOOK TECHNOLOGIES, LLC
Inventor： JIANG, Yingfei , JAMALI, Afsoon , JANG, Changwon , TRAVIS, Adrian , MAIMONE, Andrew , LU, Lu
Abstract: An optical device is provided. The optical device includes an optical grating. The optical grating includes two electrodes arranged opposite to each other and a liquid crystal (LC) composition sandwiched between the electrodes. The two electrodes provide a driving voltage to the optical grating. The LC mixture includes a host LC and one or more LC dimers dissolved as a guest in the host LC. The host LC and the one or more LC dimers have respective dielectric anisotropies of opposite signs in nematic phase. A net dielectric anisotropy of the LC mixture is substantially neutral at a predetermined temperature.
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