知搜-全球专利检索

  1. Login
  2. Sign Up

Search Results

99 records (took 0.044 seconds)

    Three dimensional (3D) imaging using optical coherence factor (OCF)
    52.
    发明授权
    Three dimensional (3D) imaging using optical coherence factor (OCF) 有权

    公开(公告)号：US11506478B2

    公开(公告)日：2022-11-22

    申请号：US17101094

    申请日：2020-11-23

    Applicant: California Institute of Technology

    Inventor： Jian Xu ,  Changhuei Yang

    IPC: G01B11/06 ,  G06T11/00 ,  G01B9/02

    Abstract: 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.

    THREE DIMENSIONAL (3D) IMAGING USING OPTICAL COHERENCE FACTOR (OCF)
    54.
    发明申请
    THREE DIMENSIONAL (3D) IMAGING USING OPTICAL COHERENCE FACTOR (OCF) 有权

    公开(公告)号：US20210156671A1

    公开(公告)日：2021-05-27

    申请号：US17101094

    申请日：2020-11-23

    Applicant: California Institute of Technology

    Inventor： Jian Xu ,  Changhuei Yang

    IPC: G01B11/06 ,  G01B9/02 ,  G06T11/00

    Abstract: 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.

    FOURIER PTYCHOGRAPHIC IMAGING SYSTEMS, DEVICES, AND METHODS
    55.
    发明申请
    FOURIER PTYCHOGRAPHIC IMAGING SYSTEMS, DEVICES, AND METHODS 有权

    公开(公告)号：US20210082595A1

    公开(公告)日：2021-03-18

    申请号：US16864618

    申请日：2020-05-01

    Applicant: California Institute of Technology

    Inventor： Guoan Zheng ,  Changhuei Yang ,  Roarke Horstmeyer

    IPC: G21K7/00 ,  G06K9/00 ,  G02B21/36 ,  G02B27/58

    Abstract: Systems, devices, and methods of Fourier ptychographic imaging configured for illuminating a specimen being imaged from a plurality of incidence angles, for acquiring variably-illuminated, low-resolution intensity images of the specimen, and for reconstructing a high-resolution image of the specimen by iteratively determining the high resolution image that is self-consistent with the variably-illuminated, low-resolution intensity images, for example, by updating overlapping regions of variably-illuminated, low-resolution intensity images in Fourier space.

    CONTROL LIGHT INTENSITY THROUGH SCATTERING MEDIA WITH SPECKLE INTENSITY SEQUENCING
    56.
    发明申请
    CONTROL LIGHT INTENSITY THROUGH SCATTERING MEDIA WITH SPECKLE INTENSITY SEQUENCING 有权

    公开(公告)号：US20210080742A1

    公开(公告)日：2021-03-18

    申请号：US17023070

    申请日：2020-09-16

    Applicant: California Institute of Technology

    Inventor： Haowen Ruan ,  Changhuei Yang ,  Jian Xu

    IPC: G02B27/48 ,  G02B26/08 ,  G02B26/10 ,  H04B10/50 ,  H04B10/61

    Abstract: 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.

    Concepts pertaining to integrated sensor and optical phase/amplitude modulator
    57.
    发明授权
    Concepts pertaining to integrated sensor and optical phase/amplitude modulator 有权

    公开(公告)号：US10935819B2

    公开(公告)日：2021-03-02

    申请号：US16016193

    申请日：2018-06-22

    Applicant: California Institute of Technology

    Inventor： Changhuei Yang ,  Sylvain Gigan

    IPC: G02F1/01 ,  G02F1/19 ,  G02F2/00

    Abstract: An integrated sensor and optical phase/amplitude modulator device including a modulator stacked on or above a detector. A circuit receives a signal outputted from the detector in response to an input field irradiating the detector. The circuit performs binary operations comprising classifying the input phase of the input electromagnetic radiation into one of two ranges and setting the modulator into one of two states depending on which range the input phase is classified into. The modulator transmits output electromagnetic radiation having an output field modulated according to the state of the modulator set by the circuit.

    Multiplexed Fourier ptychography imaging systems and methods
    59.
    发明授权
    Multiplexed Fourier ptychography imaging systems and methods 有权

    公开(公告)号：US10652444B2

    公开(公告)日：2020-05-12

    申请号：US14960252

    申请日：2015-12-04

    Applicant: California Institute of Technology

    Inventor： Roarke W. Horstmeyer ,  Guoan Zheng ,  Changhuei Yang

    IPC: G02B21/00 ,  H04N5/225 ,  H04N5/232 ,  H04N5/265 ,  G02B27/58 ,  G06K9/00 ,  G02B21/36 ,  G21K7/00

    Abstract: Certain embodiments pertain to Multiplexed Fourier Ptychographic imaging systems and methods. In one example, the Multiplexed Fourier Ptychographic imaging system includes an LED array configured to illuminate a sequence of LED patterns for illuminating a sample being imaged. The system includes LED circuitry configured to independently control power to turn on multiple LEDs simultaneously in each LED pattern of the array. The system has a light detector that acquires a first set of lower resolution images of the sample each image acquired during exposure time during illumination by a unique LED pattern. The system uses the first set of lower resolution images to generate a second set of lower resolution images associated with each LED in the LED array and iteratively updates overlapping regions in the Fourier domain with the second set of lower resolution images to generate a higher resolution image.

    ARRAY LEVEL FOURIER PTYCHOGRAPHIC IMAGING
    60.
    发明申请
    ARRAY LEVEL FOURIER PTYCHOGRAPHIC IMAGING 审中-公开

    公开(公告)号：US20190317311A1

    公开(公告)日：2019-10-17

    申请号：US16242934

    申请日：2019-01-08

    Applicant: California Institute of Technology

    Inventor： Jinho Kim ,  Changhuei Yang

    IPC: G02B21/36 ,  G01N21/64 ,  G02B21/00 ,  H04N5/225 ,  G02B13/00 ,  G02B21/16

    Abstract: In one aspect an imaging system includes: an illumination system including an array of light sources; an optical system including one or more lens arrays, each of the lens arrays including an array of lenses, each of the lenses in each of the one or more lens arrays in alignment with a corresponding set of light sources of the array of light sources; an imaging system including an array of image sensors, each of the image sensors in alignment with a corresponding lens or set of lenses of the one or more lens arrays, each of the image sensors configured to acquire image data based on the light received from the corresponding lens or set of lenses; a plate receiver system capable of receiving a multi-well plate including an array of wells, the plate receiver system configured to align each of the wells with a corresponding one of the image sensors; and a controller configured to control the illumination of the light sources and the acquisition of image data by the image sensors, the controller further configured to perform: an image acquisition process including a plurality of scans, each scan associated with a unique pattern of illumination, each of the image sensors configured to generate an image for a respective one of the wells during each scan; and an image reconstruction process during which the controller performs a fourier ptychographic operation to generate a reconstructed image for each of the wells based on the image data captured for the respective well during each of the scans.

Patent Agency Ranking