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公开(公告)号：US20220113672A1
公开(公告)日：2022-04-14
申请号：US17065734
申请日：2020-10-08
发明人： Wai Sze Tiffany LAM , Oleg YAROSHCHUK , Yun-Han LEE , Maxwell PARSONS , Andrew John OUDERKIRK , Lu LU , Scott Charles MCELDOWNEY
摘要： A method is provided. The method includes directing a first beam to a polarization sensitive recording medium. The method also includes directing a second beam to the polarization sensitive recording medium to interfere with the first beam to generate a polarization interference pattern, to which the polarization sensitive recording medium is exposed. One of the first beam and the second beam has a planar wavefront and the other has a non-planar wavefront. A first propagation direction of the first beam and a second propagation of the second beam are non-parallel.
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公开(公告)号：US20220026721A1
公开(公告)日：2022-01-27
申请号：US17495751
申请日：2021-10-06
发明人： Afsoon JAMALI , Lu LU , Andrew MAIMONE , Alireza MOHEGHI , Wai Sze Tiffany LAM , Scott Charles MCELDOWNEY , Douglas Robert LANMAN
摘要： 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：US20220137411A1
公开(公告)日：2022-05-05
申请号：US17478679
申请日：2021-09-17
发明人： Wai Sze Tiffany LAM , Yang YANG , Wanli CHI , Dominic MEISER
摘要： A waveguide display includes a substrate transparent to visible light, a first grating on the substrate and configured to couple display light into or out of the substrate, and a phase structure on the substrate and configured to change a polarization state of the display light after or before the display light reaches the first grating. The first grating is characterized by a polarization-dependent diffraction efficiency. The first grating includes, for example, a surface-relief grating or a volume Bragg grating.
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公开(公告)号：US20220107517A1
公开(公告)日：2022-04-07
申请号：US17063710
申请日：2020-10-05
发明人： Oleg YAROSHCHUK , Wai Sze Tiffany LAM , Yun-Han LEE , Maxwell PARSONS , Andrew John OUDERKIRK , Lu LU , Scott Charles MCELDOWNEY
摘要： A lens is provided. The lens includes an optically anisotropic film. The optically anisotropic film has an optic axis configured with an in-plane rotation in at least two opposite in-plane directions from a lens pattern center to opposite lens peripheries. The optic axis rotates in a same rotation direction from the lens pattern center to the opposite lens peripheries. An azimuthal angle changing rate of the optic axis is configured to increase from the lens pattern center to the opposite lens peripheries in at least a portion of the lens including the lens pattern center. The lens pattern center is shifted from a geometry center of the lens by a predetermined distance in a predetermined direction.
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公开(公告)号：US20200064641A1
公开(公告)日：2020-02-27
申请号：US16111907
申请日：2018-08-24
发明人： Wai Sze Tiffany LAM , Ying GENG , Scott MCELDOWNEY
摘要： A device and method are provided. The device comprises a reflector having variable optical power; and a waveguide display assembly optically coupled to the reflector and having a light source. The waveguide display assembly is configured to guide light from the light source to transmit in a first direction towards the reflector for a first optical path, and in a second direction towards an eye-box of the device for a second optical path. The reflector is configured to reflect the light in the first direction towards the eye-box.
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公开(公告)号：US20220291510A1
公开(公告)日：2022-09-15
申请号：US17712894
申请日：2022-04-04
发明人： Wai Sze Tiffany LAM , Lu LU
IPC分类号： G02B27/01 , G02F1/1335 , G02F1/139 , G02F1/13363 , G02F1/29 , G02B27/28 , G02B27/00 , G02B5/30 , G02B27/42
摘要： A near eye display (NED) includes multiple PBP optical elements combined with one or more C-plates to improve optical angular performance. The PBP optical elements may be configured for beam steering or for focusing light to a point. A C-plate may reduce or eliminate an undesirable polarization phase shift introduced by the PBP optical elements to angular, off-axis light. Birefringence of the PBP optical elements produces such a polarization phase shift. A C-plate provides an additional polarization phase shift that is opposite to the extra polarization phase shift by the PBP optical elements. Thus, the additional polarization phase shift by the C-plate at least partially reduces the phase shift by the PBP element.
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公开(公告)号：US20220260836A1
公开(公告)日：2022-08-18
申请号：US17178016
申请日：2021-02-17
发明人： Wanli CHI , Yang YANG , Wai Sze Tiffany LAM , Dominic MEISER
摘要： A waveguide display includes a plurality of grating layers, the plurality of grating layers characterized by two or more different base refractive indices and including a set of volume Bragg gratings (VBGs). Each VBG of the set of VBGs is configured to diffract display light in a different respective field-of-view (FOV) and wavelength range. The set of VBGs includes a plurality of groups of VBGs. VBGs in each respective group of the plurality of groups of VBGs are characterized by a same grating period and include at least one VBG in each grating layer of the plurality of grating layers.
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公开(公告)号：US20200326547A1
公开(公告)日：2020-10-15
申请号：US16861657
申请日：2020-04-29
IPC分类号： G02B27/01 , G02F1/1343 , G02F1/1347 , G02B5/30 , G02B27/00 , G02C7/10
摘要： An optical device is provided. The optical device includes a first liquid crystal (“LC”) cell and a second LC cell stacked with the first LC cell. The first and second LC cells are configured to provide a phase retardation to a light transmitted therethrough. The optical device also includes at least one first compensation film disposed between the first LC cell and the second LC cell. The optical device also includes a second compensation film disposed at a first side of the first LC cell opposite to a second side of the first LC cell where the at least one first compensation film is disposed. The optical device also includes a third compensation film disposed at a first side of the second LC cell opposite to a second side of the second LC cell where the at least one first compensation film is disposed.
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公开(公告)号：US20220291437A1
公开(公告)日：2022-09-15
申请号：US17667827
申请日：2022-02-09
发明人： Wai Sze Tiffany LAM , Yang YANG , Wanli CHI , Dominic MEISER
摘要： A waveguide display includes a first waveguide, a second waveguide, a spacer between the first waveguide and the second waveguide, and a light redirecting or absorbing structure on at least one surface of the first waveguide and/or at least one surface of the second waveguide. The first waveguide includes a first grating configured to couple a first portion of display light into the first waveguide and towards a second grating of the first waveguide. The second waveguide includes a third grating aligned with the first grating and configured to couple a second portion of the display light into the second waveguide and towards a fourth grating of the second waveguide. The light redirecting or absorbing structure is configured to absorb or redirect incident light from a first angular range towards an edge of the waveguide display, without altering incident light from other angular ranges.
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公开(公告)号：US20220137410A1
公开(公告)日：2022-05-05
申请号：US17478674
申请日：2021-09-17
摘要： A waveguide display includes a substrate transparent to visible light, a first grating on the substrate and configured to couple display light into or out of the substrate, and a phase structure on the substrate and configured to change a polarization state of the display light after or before the display light reaches the first grating. The first grating is characterized by a polarization-dependent diffraction efficiency. The first grating includes, for example, a surface-relief grating or a volume Bragg grating.
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