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公开(公告)号：US20210208389A1
公开(公告)日：2021-07-08
申请号：US16735425
申请日：2020-01-06
发明人： Lu LU , Gang LI , Seungjae LEE , Mengfi WANG
摘要： Various embodiments set forth a foveated display system and components thereof. The foveated display system includes a peripheral display module disposed in series with a foveal display module. The peripheral display module is configured to generate low-resolution, large field of view imagery for a user's peripheral vision. The foveal display module is configured to perform foveated rendering in which high-resolution imagery is focused towards a foveal region of the user's eye gaze. The peripheral display module may include a diffuser that is disposed within a pancake lens, which is a relatively compact design. The foveal display module may include a Pancharatnam-Berry Phase grating stack that increases the steering range of a beam-steering device such that a virtual image can be steered to cover an entire field of view visible to the user's eye.
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公开(公告)号：US20210011284A1
公开(公告)日：2021-01-14
申请号：US16505462
申请日：2019-07-08
发明人： Gregory Olegovic ANDREEV , Gang LI , Erik SHIPTON , Yingfei JIANG , Wanli CHI , Andrew John OUDERKIRK
摘要： Techniques disclosed herein relate to a near-eye display system. One example of an eye-tracking system includes a substrate transparent to visible light and infrared light and a reflective holographic grating conformally coupled to a surface of the substrate. The reflective holographic grating is configured to transmit the visible light and reflectively diffract infrared light in a first wavelength range for eye tracking. The refractive index modulation of the reflective holographic grating is apodized in a direction along a thickness of the reflective holographic grating to reduce optical artifacts in the visible light.
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公开(公告)号：US20210088700A1
公开(公告)日：2021-03-25
申请号：US16714441
申请日：2019-12-13
发明人： Mengfei WANG , Gang LI , Lu LU , Yunqi LI
IPC分类号： G02B5/02 , G02B27/01 , G02B27/28 , G02F1/1335
摘要： A variofocal display device includes an image source and a display. The image source is configured to project image light. The display includes a first optical diffuser and a second optical diffuser. The display is configured to receive the image light. The first diffuser is configured to diffuse the image light at the first optical diffuser when the image light has a first polarization, and to diffuse the image light at the second optical diffuser when the image light is configured has a second polarization different from the first polarization. A method of displaying images using a varifocal display device is also disclosed.
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公开(公告)号：US20210080725A1
公开(公告)日：2021-03-18
申请号：US16810471
申请日：2020-03-05
发明人： Yusufu Njoni Bamaxam SULAI , Gang LI , Ying GENG , Brian WHEELWRIGHT , Jacques GOLLIER , Babak AMIRSOLAIMANI , Weichuan GAO
摘要： A display device includes an optical diffuser configured to, in response to receiving image light, output diffused image light having a same polarization as the image light. The optical diffuser is also configured to transmit ambient light. The display device also includes an optical assembly that includes a substrate, a reflector coupled to the substrate, and a beam splitter coupled to the substrate. The optical assembly is configured to transmit the diffused image light at a first optical power by reflecting the diffused image light at the reflector and at the beam splitter and to transmit the transmitted ambient light at a second optical power that is less than the first optical power without reflection at the reflector or the beam splitter. A method for transmitting light through the display device is also disclosed.
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公开(公告)号：US20200371282A1
公开(公告)日：2020-11-26
申请号：US15930318
申请日：2020-05-12
发明人： Ying GENG , Adrian TRAVIS , Gang LI
摘要： A device for illuminating a spatial light modulator includes a light source and an optical element. The light source is configured to provide illumination light. The optical element has a first surface, a second surface that is distinct from and non-parallel to the first surface, and a third surface that is distinct from and non-parallel to the first surface and the second surface. The optical element is configured to receive the illumination light at the first surface, propagate the illumination light via total internal reflection, and output the illumination light from the third surface. Also disclosed is a method performed by the device.
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公开(公告)号：US20210364987A1
公开(公告)日：2021-11-25
申请号：US16878018
申请日：2020-05-19
发明人： Gang LI , Kiseung BANG , Andrew MAIMONE , Changwon JANG , Mengfei WANG , Afsoon JAMALI , Junren WANG
摘要： 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 embodiments, 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：US20210011303A1
公开(公告)日：2021-01-14
申请号：US16505412
申请日：2019-07-08
发明人： Gregory Olegovic ANDREEV , Gang LI , Erik SHIPTON , Yingfei JIANG , Wanli CHI , Andrew John OUDERKIRK
摘要： Techniques disclosed herein relate to a near-eye display system. One example of an optical device of a near-eye display includes a substrate and holographic grating conformally coupled to a surface of the substrate. The substrate is transparent to visible light and infrared light and is configured to be placed in front of an eye of a user of the near-eye display. A refractive index modulation of the holographic grating is apodized in a surface-normal direction of the substrate to reduce optical artifacts in the visible light.
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公开(公告)号：US20210080726A1
公开(公告)日：2021-03-18
申请号：US16810494
申请日：2020-03-05
发明人： Ying GENG , Brian WHEELWRIGHT , Jacques GOLLIER , Yusufu Njoni Bamaxam SULAI , Babak AMIRSOLAIMANI , Weichuan GAO , Gang LI , Mengfei WANG , Adrian TRAVIS
摘要： A display device includes a projector and a display that has a first surface and a second surface. The projector is configured to project image light toward the display. The display is configured to output diffused image light from the first surface and to transmit ambient light from the second surface to the first surface. The display device also includes an optical assembly that has a substrate with substantially uniform thickness. The optical assembly is configured to receive the diffused image light and transmit a portion of the diffused image light output from the first surface of the display at a first optical power. The optical assembly is also configured to receive the ambient light and transmit a portion of the ambient light through the optical assembly at a second optical power that is less than the first optical power.
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公开(公告)号：US20220244450A1
公开(公告)日：2022-08-04
申请号：US17721282
申请日：2022-04-14
发明人： Ying GENG , Adrian TRAVIS , Gang LI
摘要： A device for illuminating a spatial light modulator includes a light source and an optical element. The light source is configured to provide illumination light. The optical element has a first surface, a second surface that is distinct from and non-parallel to the first surface, and a third surface that is distinct from and non-parallel to the first surface and the second surface. The optical element is configured to receive the illumination light at the first surface, propagate the illumination light via total internal reflection, and output the illumination light from the third surface. Also disclosed is a method performed by the device.
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公开(公告)号：US20210208397A1
公开(公告)日：2021-07-08
申请号：US16735409
申请日：2020-01-06
发明人： Lu LU , Gang LI , Seungjae LEE , Mengfi WANG
摘要： Various embodiments set forth a foveated display system and components thereof. The foveated display system includes a peripheral display module disposed in series with a foveal display module. The peripheral display module is configured to generate low-resolution, large field of view imagery for a user's peripheral vision. The foveal display module is configured to perform foveated rendering in which high-resolution imagery is focused towards a foveal region of the user's eye gaze. The peripheral display module may include a diffuser that is disposed within a pancake lens, which is a relatively compact design. The foveal display module may include a Pancharatnam-Berry Phase grating stack that increases the steering range of a beam-steering device such that a virtual image can be steered to cover an entire field of view visible to the user's eye.
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