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公开(公告)号：US20220341723A1
公开(公告)日：2022-10-27
申请号：US17661254
申请日：2022-04-28
发明人： Joshua Brake , Jian Xu , Changhuei Yang
IPC分类号： G01B9/02055 , G01B11/24 , G01B9/02015
摘要： Interferometric speckle visibility spectroscopy methods, systems, and non-transitory computer readable media for recovering sample speckle field data or a speckle field pattern from an off-axis interferogram recorded by one or more sensors over an exposure time and determining sample dynamics of a sample being analyzed from speckle statistics of the speckle field data or the speckle field pattern.
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公开(公告)号：US11346650B2
公开(公告)日：2022-05-31
申请号：US16946063
申请日：2020-06-04
发明人： Joshua Brake , Jian Xu , Changhuei Yang
IPC分类号： G01B9/02 , G01B11/24 , G01B9/02055 , G01B9/02015
摘要： Interferometric speckle visibility spectroscopy methods, systems, and non-transitory computer readable media for recovering sample speckle field data or a speckle field pattern from an off-axis interferogram recorded by one or more sensors over an exposure time and determining sample dynamics of a sample being analyzed from speckle statistics of the speckle field data or the speckle field pattern.
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公开(公告)号：US20220116561A1
公开(公告)日：2022-04-14
申请号：US17450633
申请日：2021-10-12
发明人： Jian Xu , Ruizhi Cao , Changhuei Yang
摘要： Active focusing non-line-of-sight methods and systems for focusing light over or around an obstacle to an object where light is focused using wavefront shaping based on feedback readings of light scattered by a two-dimensional scatterer such as a wall.
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公开(公告)号：US11506478B2
公开(公告)日：2022-11-22
申请号：US17101094
申请日：2020-11-23
发明人： Jian Xu , Changhuei Yang
摘要： A 3-D imaging system including a computer determining a plurality of coherence factors measuring an intensity contrast between a first intensity of a first region of an interference comprising constructive interference between a sample wavefront and a reference wavefront, and a second intensity of a second region of the interference comprising destructive interference between the sample wavefront and the reference wavefront, wherein the interference between a reference wavefront and a reflection from different locations on a surface of an object. From the coherence factors, the computer determines height data comprising heights of the surface with respect to an x-y plane perpendicular to the heights and as a function of the locations in the x-y plane. The height data is useful for generating a three dimensional topological image of the surface.
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公开(公告)号：US20210156671A1
公开(公告)日：2021-05-27
申请号：US17101094
申请日：2020-11-23
发明人： Jian Xu , Changhuei Yang
摘要： A 3-D imaging system including a computer determining a plurality of coherence factors measuring an intensity contrast between a first intensity of a first region of an interference comprising constructive interference between a sample wavefront and a reference wavefront, and a second intensity of a second region of the interference comprising destructive interference between the sample wavefront and the reference wavefront, wherein the interference between a reference wavefront and a reflection from different locations on a surface of an object. From the coherence factors, the computer determines height data comprising heights of the surface with respect to an x-y plane perpendicular to the heights and as a function of the locations in the x-y plane. The height data is useful for generating a three dimensional topological image of the surface.
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公开(公告)号：US20210080742A1
公开(公告)日：2021-03-18
申请号：US17023070
申请日：2020-09-16
发明人： Haowen Ruan , Changhuei Yang , Jian Xu
摘要： Optical wavefront shaping has been the standard technique to control light through scattering media. Implicit in this dominance is the assumption that knowledge of the optical phase is a necessity for optical control through scattering media. In this paper, we challenge this assumption by reporting on an intensity-only approach for light control through (or reflected from) a disordered scattering medium—optical-channel-based intensity streaming (OCIS). Instead of actively tuning the interference between the optical paths via wavefront shaping, OCIS can control light and transmit information through or from scattering media with linear intensity operation, which not only simplifies and speeds up the system but also enables new applications. We experimentally created focus patterns through scattering media in a sub-millisecond timescale with a phase-manipulation-free setup. We also demonstrate that, unlike wavefront shaping, OCIS can readily generate distinct energy null points through scattering media. Finally, we demonstrate that OCIS enables a scattering medium mediated secure optical communication application.
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公开(公告)号：US20220103348A1
公开(公告)日：2022-03-31
申请号：US17487924
申请日：2021-09-28
发明人： Jian Xu , Changhuei Yang
IPC分类号： H04L9/06 , G02B27/48 , H04B10/54 , H04B10/66 , H04B10/2537
摘要： A communication system including a first detector; a first scattering medium; a second detector; an intensity modulator; a second scattering medium; wherein electromagnetic radiation transmitted from a first spot at the first scattering medium, and scattered by and through the first scattering medium and then the second scattering medium, forms a first speckle pattern detected by the second detector. The intensity modulator outputs a second spot of electromagnetic radiation representing the “ones” in a data stream at locations of the bright speckles (or at locations of the dark speckles to represent the “zeros” in the data stream) so that the electromagnetic radiation, transmitted from the second spot and scattered by and through the second scattering medium and then the first scattering medium, forms one or more second bright or dark speckles on the first detector. The data stream can be constructed from the second bright or dark speckles.
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