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公开(公告)号：US11226591B2
公开(公告)日：2022-01-18
申请号：US16660777
申请日：2019-10-22
Applicant: Massachusetts Institute of Technology
Inventor： V. Michael Bove, Jr. , Sundeep Jolly , Daniel E. Smalley
Abstract: In a method for forming a holographic image, light is provided to a flat-panel holographic video display that includes waveguide elements that each have a light-guiding substrate and an array of transducers configured to produce a diffraction grating comprising surface acoustic waves. The grating causes the waveguide to outcouple light, focusing it to, or producing wavefront curvatures consistent with it having emanated from, one or more points, in order to form a holographic image. The transducer array may include a large number of densely packed, vertically-adjacent transducers for each hogel for full parallax or may include a small number of vertically-adjacent transducers and a cylindrical optical element for each hogel. The display may be edge-illuminated by a collinear multicolor source. The substrate exit face may have nanopatterned areas alternated with flat areas in order to create regions of optimal internal reflection next to regions of low reflection.
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公开(公告)号：US20210080906A1
公开(公告)日：2021-03-18
申请号：US16945788
申请日：2020-07-31
Applicant: Massachusetts Institute of Technology
Inventor： Sundeep Jolly , Nickolaos Savidis , V. Michael Bove, JR. , Bianca Datta , Daniel E. Smalley
IPC: G03H1/02 , F21V8/00 , G02B27/01 , G02F1/33 , G02F1/335 , G02B5/32 , G03H1/00 , G03H1/26 , G03H1/22
Abstract: A holographic display is comprised of space-multiplexed elemental modulators, each of which consists of a surface acoustic wave transducer atop an anisotropic waveguide. Each “line” of the overall display consists of a single anisotropic waveguide across the display's length with multiple surface acoustic wave transducers spaced along the waveguide length, although for larger displays, the waveguide may be divided into segments, each provided with separate illumination. Light that is undiffracted by a specific transducer is available for diffraction by subsequent transducers. Per transducer, guided-mode light is mode-converted to leaky-mode light, which propagates into the substrate away from the viewer before encountering a volume reflection grating and being reflected and steered towards the viewer. The display is transparent and all reflection volume gratings operate in the Bragg regime, thereby creating no dispersion of ambient light.
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Patent Agency Ranking
公开(公告)号：US20210003968A1
公开(公告)日：2021-01-07
申请号：US16660777
申请日：2019-10-22
Applicant: Massachusetts Institute of Technology
Inventor： V. Michael Bove, JR. , Sundeep Jolly , Daniel E. Smalley
Abstract: In a method for forming a holographic image, light is provided to a flat-panel holographic video display that includes waveguide elements that each have a light-guiding substrate and an array of transducers configured to produce a diffraction grating comprising surface acoustic waves. The grating causes the waveguide to outcouple light, focusing it to, or producing wavefront curvatures consistent with it having emanated from, one or more points, in order to form a holographic image. The transducer array may include a large number of densely packed, vertically-adjacent transducers for each hogel for full parallax or may include a small number of vertically-adjacent transducers and a cylindrical optical element for each hogel. The display may be edge-illuminated by a collinear multicolor source. The substrate exit face may have nanopatterned areas alternated with flat areas in order to create regions of optimal internal reflection next to regions of low reflection.
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公开(公告)号：US20180074457A1
公开(公告)日：2018-03-15
申请号：US15658388
申请日：2017-07-24
Applicant: Massachusetts Institute of Technology
Inventor： Sundeep Jolly , Nickolaos Savidis , V. Michael Bove, JR. , Bianca Datta , Daniel E. Smalley
CPC classification number: G03H1/0248 , G02B5/32 , G02B6/0016 , G02B6/005 , G02B6/0078 , G02B6/34 , G02B27/0172 , G02B2027/0123 , G02B2027/014 , G02B2027/015 , G02B2027/0174 , G02F1/332 , G02F1/335 , G02F2201/124 , G02F2201/307 , G02F2202/20 , G02F2203/07 , G03H1/0005 , G03H1/2286 , G03H1/2645 , G03H2001/0088 , G03H2223/16 , G03H2223/23 , G03H2223/24 , G03H2225/21 , G03H2225/60 , G03H2226/02 , G03H2227/02
Abstract: A holographic display is comprised of space-multiplexed elemental modulators, each of which consists of a surface acoustic wave transducer atop an anisotropic waveguide. Each “line” of the overall display consists of a single anisotropic waveguide across the display's length with multiple surface acoustic wave transducers spaced along the waveguide length, although for larger displays, the waveguide may be divided into segments, each provided with separate illumination. Light that is undiffracted by a specific transducer is available for diffraction by subsequent transducers. Per transducer, guided-mode light is mode-converted to leaky-mode light, which propagates into the substrate away from the viewer before encountering a volume reflection grating and being reflected and steered towards the viewer. The display is transparent and all reflection volume gratings operate in the Bragg regime, thereby creating no dispersion of ambient light.
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公开(公告)号：US11693363B2
公开(公告)日：2023-07-04
申请号：US16945788
申请日：2020-07-31
Applicant: Massachusetts Institute of Technology
Inventor： Sundeep Jolly , Nickolaos Savidis , V. Michael Bove, Jr. , Bianca Datta , Daniel E. Smalley
IPC: G02B6/04 , G03H1/02 , F21V8/00 , G02B27/01 , G02F1/33 , G02F1/335 , G02B5/32 , G03H1/00 , G03H1/26 , G03H1/22 , G02B6/34
CPC classification number: G03H1/0248 , G02B5/32 , G02B6/005 , G02B6/0016 , G02B6/0078 , G02B27/0172 , G02F1/332 , G02F1/335 , G03H1/0005 , G03H1/2286 , G03H1/2645 , G02B6/34 , G02B2027/014 , G02B2027/015 , G02B2027/0123 , G02B2027/0174 , G02F2201/124 , G02F2201/307 , G02F2202/20 , G02F2203/07 , G03H2001/0088 , G03H2223/16 , G03H2223/23 , G03H2223/24 , G03H2225/21 , G03H2225/60 , G03H2226/02 , G03H2227/02
Abstract: A holographic display is comprised of space-multiplexed elemental modulators, each of which consists of a surface acoustic wave transducer atop an anisotropic waveguide. Each “line” of the overall display consists of a single anisotropic waveguide across the display's length with multiple surface acoustic wave transducers spaced along the waveguide length, although for larger displays, the waveguide may be divided into segments, each provided with separate illumination. Light that is undiffracted by a specific transducer is available for diffraction by subsequent transducers. Per transducer, guided-mode light is mode-converted to leaky-mode light, which propagates into the substrate away from the viewer before encountering a volume reflection grating and being reflected and steered towards the viewer. The display is transparent and all reflection volume gratings operate in the Bragg regime, thereby creating no dispersion of ambient light.
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公开(公告)号：US10452026B2
公开(公告)日：2019-10-22
申请号：US14985453
申请日：2015-12-31
Applicant: Massachusetts Institute of Technology
Inventor： V. Michael Bove, Jr. , Sundeep Jolly , Daniel E. Smalley
Abstract: A flat-panel holographic video display includes a control layer and waveguide elements. Each waveguide element has a light-guiding substrate and an array of transducers configured to produce a diffraction grating comprising surface acoustic waves. The grating causes the waveguide to outcouple light, focusing it to, or producing wavefront curvatures consistent with it having emanated from, one or more points, in order to form a holographic image. The transducer array may include a large number of densely packed, vertically-adjacent transducers for each hogel for full parallax or may include a small number of vertically-adjacent transducers and a cylindrical optical element for each hogel. A spatial filter may be used to block noise. The display may be edge-illuminated by a collinear multicolor source. The substrate exit face may have nanopatterned areas alternated with flat areas in order to create regions of optimal internal reflection next to regions of low reflection.
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公开(公告)号：US20160223988A1
公开(公告)日：2016-08-04
申请号：US14985453
申请日：2015-12-31
Applicant: Massachusetts Institute of Technology
Inventor： V. Michael Bove, JR. , Sundeep Jolly , Daniel E. Smalley
CPC classification number: G03H1/2294 , G02F1/125 , G03H1/02 , G03H2001/0224 , G03H2001/2292 , G03H2223/17 , G03H2225/21
Abstract: A flat-panel holographic video display includes a control layer and waveguide elements. Each waveguide element has a light-guiding substrate and an array of transducers configured to produce a diffraction grating comprising surface acoustic waves. The grating causes the waveguide to outcouple light, focusing it to, or producing wavefront curvatures consistent with it having emanated from, one or more points, in order to form a holographic image. The transducer array may include a large number of densely packed, vertically-adjacent transducers for each hogel for full parallax or may include a small number of vertically-adjacent transducers and a cylindrical optical element for each hogel. A spatial filter may be used to block noise. The display may be edge-illuminated by a collinear multicolor source. The substrate exit face may have nanopatterned areas alternated with flat areas in order to create regions of optimal internal reflection next to regions of low reflection.
Abstract translation: 平板全息影像显示器包括控制层和波导元件。 每个波导元件具有导光基板和配置成产生包括表面声波的衍射光栅的换能器阵列。 光栅使得波导将光聚焦，聚焦到或产生与从一个或多个点发出的波前曲率一致以形成全息图像。 换能器阵列可以包括大量密集堆叠的垂直相邻的换能器，用于每个宏块用于完全视差，或者可以包括少量垂直相邻的换能器和用于每个红宝石的圆柱形光学元件。 可以使用空间滤波器来阻止噪声。 显示器可以由共线多色源边缘照明。 基板出口面可以具有与平坦区域交替的纳米图案区域，以便产生邻近低反射区域的最佳内部反射区域。
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