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    3D intraoral camera using frequency modulation
    4.
    发明授权
    3D intraoral camera using frequency modulation 有权

    公开(公告)号：US11543232B2

    公开(公告)日：2023-01-03

    申请号：US16476141

    申请日：2017-01-05

    申请人： Carestream Dental Technology Topco Limited

    发明人： Chuanmao Fan ,  Victor C. Wong

    IPC分类号： G01B9/02004 ,  A61B1/24 ,  A61B5/00 ,  G01B9/02003 ,  G01B11/24 ,  G01S17/89 ,  G01S17/34

    摘要： An apparatus for oral imaging has a light source energizable to generate a light frequency signal ranging from a minimum to a maximum frequency. An image acquisition apparatus scans the generated light frequency signal to successive positions on a sample surface and to combine a returned signal from each successive position with the generated light frequency signal. The image acquisition apparatus has a detector that obtains a beat frequency signal from the combined returned signal and the generated light frequency signal. A processor that is in signal communication with the detector generates a processed beat signal from the combined signals, wherein the processed beat signal is indicative of the distance from the tunable laser source to the sample surface at the corresponding position. A display is in signal communication with the processor and is energizable to display distance data according to the processed beat signal for each scanned position.

    SCAN PATTERN AND SIGNAL PROCESSING FOR OPTICAL COHERENCE TOMOGRAPHY
    5.
    发明申请
    SCAN PATTERN AND SIGNAL PROCESSING FOR OPTICAL COHERENCE TOMOGRAPHY 有权

    公开(公告)号：US20220257112A1

    公开(公告)日：2022-08-18

    申请号：US17662582

    申请日：2022-05-09

    申请人： ACUCELA INC.

    发明人： Ryo KUBOTA ,  Stephan WYDER ,  Philip M. BUSCEMI ,  Matthias PFISTER ,  Alexander HOLZER

    IPC分类号： A61B3/10 ,  G01B9/02004 ,  G01B9/02091 ,  A61B3/12

    摘要： An OCT system for measuring a retina as part of an eye health monitoring and diagnosis system. The OCT system includes an OCT interferometer, where the interferometer comprises a light source or measurement beam and a scanner for moving the beam on the retina of a patient's eye, and a processor configured to execute instructions to cause the scanner to move the measurement beam on the retina in a scan pattern. The scan pattern is a continuous pattern that includes a plurality of lobes. The measurement beam may be caused to move on the retina by the motion of a mirror that intercepts and redirects the measurement beam. The mirror position may be altered by the application of a drive signal to one or more actuators that respond to the drive signal by rotating the mirror about an axis or axes.

    Scan pattern and signal processing for optical coherence tomography
    6.
    发明授权
    Scan pattern and signal processing for optical coherence tomography 有权

    公开(公告)号：US11369266B2

    公开(公告)日：2022-06-28

    申请号：US17248870

    申请日：2021-02-11

    申请人： ACUCELA INC.

    发明人： Ryo Kubota ,  Stephan Wyder ,  Philip M. Buscemi ,  Matthias Pfister ,  Alexander Holzer

    IPC分类号： A61B3/10 ,  G01B9/02 ,  A61B3/12 ,  G01B9/02004 ,  G01B9/02091

    摘要： An OCT system for measuring a retina as part of an eye health monitoring and diagnosis system. The OCT system includes an OCT interferometer, where the interferometer comprises a light source or measurement beam and a scanner for moving the beam on the retina of a patient's eye, and a processor configured to execute instructions to cause the scanner to move the measurement beam on the retina in a scan pattern. The scan pattern is a continuous pattern that includes a plurality of lobes. The measurement beam may be caused to move on the retina by the motion of a mirror that intercepts and redirects the measurement beam. The mirror position may be altered by the application of a drive signal to one or more actuators that respond to the drive signal by rotating the mirror about an axis or axes.

    OPTICAL INTERFERENCE TOMOGRAPHIC IMAGING DEVICE
    7.
    发明公开
    OPTICAL INTERFERENCE TOMOGRAPHIC IMAGING DEVICE 审中-公开

    公开(公告)号：US20230358527A1

    公开(公告)日：2023-11-09

    申请号：US18022015

    申请日：2020-08-27

    申请人： NEC Corporation

    发明人： Shigeru NAKAMURA

    IPC分类号： G01B9/02091 ,  G01B9/02004 ,  G01B9/02055

    CPC分类号： G01B9/02091 ,  G01B9/02004 ,  G01B9/02072

    摘要： This optical interference tomographic imaging device comprising: a wavelength swept laser light source; a splitting means for splitting light emitted from the light source into object light and reference light; an irradiation means for directing the object light outputted to an object, and scanning a predetermined range; a light spectral data generation means for generating information regarding the wavelength dependency of the intensity ratio of interfering light of the reference light and the object light that has been directed to the object to be measured and has been scattered; a wavelength dispersion compensation processing means for performing compensation for the information regarding the wavelength dependency generated, the compensation carried out based on the wavelength dispersion difference of the path of the object light path and the path of the reference light; and a cross section structure information generation means for generating cross section structure information of the object.

    Optical deflector parameter measurement device, method, and program
    9.
    发明授权
    Optical deflector parameter measurement device, method, and program 有权

    公开(公告)号：US11656073B2

    公开(公告)日：2023-05-23

    申请号：US17293706

    申请日：2019-12-02

    申请人： NIPPON TELEGRAPH AND TELEPHONE CORPORATION

    发明人： Masahiro Ueno ,  Soichi Oka

    IPC分类号： G01B11/26 ,  G01J9/02 ,  G01M11/02 ,  G01B9/02004

    CPC分类号： G01B11/26 ,  G01J9/0246 ,  G01M11/0207 ,  G01B9/02004 ,  G01B2290/60

    摘要： A parameter measurement device of a light deflector includes a photodetector that receives output light from the light deflector, a biaxial translation automatic stage that moves the photodetector to a plurality of positions, and a signal processing device that calculates the wavelength of the output light of a wavelength sweeping light source for each time, calculates the wavelength of the light received from the light deflector by the photodetector based on the output signal of the photodetector and a previously-calculated wavelength, and calculates the incident angle of the output light beam of the wavelength sweeping light source onto the diffraction grating and an angle formed by an L-axis and a line perpendicular to the surface of the diffraction grating by performing fitting so that the coordinates of the photodetector that are obtained for each position of the photodetector and the wavelength of the light conform to a prescribed relational expression.

    Methods, systems and apparatus of interferometry for imaging and sensing
    10.
    发明授权
    Methods, systems and apparatus of interferometry for imaging and sensing 有权

    公开(公告)号：US11598627B2

    公开(公告)日：2023-03-07

    申请号：US16075174

    申请日：2017-02-03

    申请人： VIRGINIA TECH INTELLECTUAL PROPERTIES, INC.

    发明人： Yizheng Zhu

    IPC分类号： G01B9/02001 ,  G01B9/02004 ,  G01B9/02002 ,  G01B9/04 ,  G02B27/52 ,  G01B9/02098

    摘要： Various methods, systems and apparatus are provided for imaging and sensing using interferometry. In one example, a system includes an interferometer; a light source that can provide light to the interferometer at multiple wavelengths (λi); and optical path delay (OPD) modifying optics that can enhance contrast in an interferometer output associated with a sample. The light can be directed to the sample by optics of the interferometer. The interferometer output can be captured by a detector (e.g., a camera) at each of the multiple wavelengths (λi). In another example, an apparatus includes an add-on unit containing OPD that can enhance contrast in an interferometer output associated with a sample illuminated by light at a defined wavelength (λi). A detector can be attached to the add-on unit to record the interferometer output at the defined wavelength (λi).