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1. 发明授权

US11543232B2 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.

2. 发明申请

US20220257112A1 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.

3. 发明授权

US11369266B2 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.

4. 发明授权

US11598627B2 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).

5. 发明授权

US11408722B2 OCT measuring device and oct measuring method 有权
公开(公告)号：US11408722B2
公开(公告)日：2022-08-09
申请号：US17241125
申请日：2021-04-27
申请人： Panasonic Intellectual Property Management Co., Ltd.
发明人： Yohei Takechi , Jun Yokoyama
IPC分类号： G01B9/02 , G01B9/02001 , G01B9/02091 , G01B9/02004
摘要： OCT measuring device in the present exemplary embodiment includes: wavelength sweep light source that emits light of which a wavelength is swept; optical interferometer that divides the light into measurement light and reference light, emits measurement light toward measurement surface of measuring target object, and generates an optical interference intensity signal indicating an intensity of interference between measurement light reflected from measurement surface and reference light; electro-optic element which is a phase modulator arranged in a light path of optical interferometer; measurement processor which is a signal generator that derives a position of measurement surface and generates a phase amount indicator signal that indicates a phase amount of phase modulator based on the optical interference intensity signal; and electro-optic element controller which is a phase amount controller that controls the phase amount given to the light that is transmitted through phase modulator.

6. 发明授权

US11382517B2 Intra-oral scanning device with integrated optical coherence tomography (OCT) 有权
公开(公告)号：US11382517B2
公开(公告)日：2022-07-12
申请号：US16298613
申请日：2019-03-11
申请人： D4D Technologies, LLC
发明人： Ye Li , Justin G. Graham , Rod A. Duncan , Greg R. Basile , Grant E. Kenworthy , Henley S. Quadling , Mark S. Quadling , Glen Freeman
IPC分类号： A61B5/00 , A61C9/00 , G01B11/24 , G01B9/02091 , G01B9/02004
摘要： An intra-oral scanning device includes a light source and an optical system, and communicates with a display system. The device provides for more efficient transmission and capture of images. It integrates OCT scanning with RGB-based scanning. In operation, the device is used for recording topological characteristics of teeth, dental impressions, or stone models by digital methods and for use in CAD/CAM of dental restorative prosthetic devices. To that end, the RGB-based scan obtains surface data (e.g., a margin), while the OCT scan penetrates the surface. The two scanners operate from within the same physical housing and preferably at the same time such that only one scanning pass (to obtain all necessary data) is required. The 3D data obtained from the OCT scan is registered with the 3D data obtained from the RGB-based scan by virtue of being captured using a common return path. Preferably, the 3D surface data is used to align the volume data, such that the OCT scan operates over a much sparser scanning volume than would otherwise be required if the OCT scan were carried out separately. In this manner, there is less stitching of data required to build the output images, thereby enabling a “one-pass” operation.

7. 发明授权

US11555692B2 Calculation of redundant bend in multi-core fiber for safety 有权
公开(公告)号：US11555692B2
公开(公告)日：2023-01-17
申请号：US17184357
申请日：2021-02-24
申请人： Intuitive Surgical Operations, Inc.
发明人： Patrick Roye , Mark E. Froggatt , Dawn K. Gifford
IPC分类号： B25J9/00 , B25J9/12 , B25J11/00 , B25J13/08 , B25J18/00 , G01B11/16 , G01B9/02004 , A61B34/30 , A61B34/35 , B25J9/16 , G01B11/26 , A61B34/20
摘要： A fiber includes M primary cores and N redundant cores, where M an integer is greater than two and N is an integer greater than one. Interferometric circuitry detects interferometric pattern data associated with the M primary cores and the N redundant cores when the optical fiber is placed into a sensing position. Data processing circuitry calculates a primary core fiber bend value for the M primary cores and a redundant core fiber bend value for the N redundant cores based on a predetermined geometry of the M primary cores and the N redundant cores in the fiber and detected interferometric pattern data associated with the M primary cores and the N redundant cores. The primary core fiber bend value and the redundant core fiber bend value are compared in a comparison. The detected data for the M primary cores is determined reliable or unreliable based on the comparison. A signal is generated in response to an unreliable determination.

8. 发明授权

US11385044B2 Extending the range of spectrally controlled interferometry by superposition of multiple spectral modulations 有权
公开(公告)号：US11385044B2
公开(公告)日：2022-07-12
申请号：US16848954
申请日：2020-04-15
申请人： APRE INSTRUMENTS, LLC
发明人： Piotr Szwaykowski
IPC分类号： G01B9/02004 , G01B9/02015
摘要： The range of measurement in spectrally controlled interferometry (SCI) is extended by superimposing multiple modulations on the low-coherence light used for the measurement. Optimally, a spectrally controllable light source modulated sinusoidally with low spectral frequency is combined with a delay line, such as provided by a Michelson interferometer. The resulting light is injected into a Fizeau interferometer to generate localized fringes at a distance corresponding to the effect of the spectrally modulated source combined with the optical path difference produced by the delay line. The combination provides a convenient way to practice SCI with all its advantages and with a range that can be extended to the degree required for any practically foreseeable application. Alternatively, a single source capable of multiple modulations can be used instead of a separate second modulator component.

9. 发明申请

US20220155599A1 EYE ACCOMMODATION DISTANCE MEASURING DEVICE AND METHOD FOR HEAD-MOUNTED DISPLAY, AND HEAD-MOUNTED DISPLAY 有权
公开(公告)号：US20220155599A1
公开(公告)日：2022-05-19
申请号：US17581352
申请日：2022-01-21
申请人： Samsung Electronics Co., Ltd.
发明人： Vladislav Valerievich LYCHAGOV , Vladimir Mikhailovich SEMENOV , Evgeniia Yurievna SALAMATOVA
IPC分类号： G02B27/01 , G01B9/02001 , G01B9/02004 , G01S17/34 , G01S7/4915
摘要： An eye accommodation distance determining device is provided. The eye accommodation distance determining device includes an interferometer configured to generate a plurality of frequency modulated laser beams in different directions and to generate a plurality of interferometric signals using laser beams reflected from eye reflecting surfaces, a signal processer configured to generate a signal spectrum using each of said plurality of interferometric signals, a distance determiner configured to determine distances to the eye reflecting surfaces for each of said plurality of frequency modulated laser beams, a point coordinates determiner configured to determine coordinates of points on each of the eye reflecting surfaces for each of the laser beams, a reconstructor configured to generate an eye inner structure model based on the determined coordinates of points, and an eye accommodation distance determiner configured to determine, based on said eye inner structure model, an eye accommodation distance.

10. 发明申请

US20220136818A1 OPTICAL COHERENCE TOMOGRAPHY ANALYSIS METHOD AND APPARATUS 有权
公开(公告)号：US20220136818A1
公开(公告)日：2022-05-05
申请号：US17599975
申请日：2020-04-03
申请人： CENTRO INTERNAZIONALE DELLA FOTONICA PER ENERGIA (CIFE) IN FORMA ABBREVIATA "CIFE"
发明人： Aldo RIGHETTI , Maria Chiara UBALDI , Giorgio GRASSO
IPC分类号： G01B9/02091 , G01B9/02004 , A61B3/10
摘要： The present invention relates to an optical coherence tomography analysis method, comprising: Providing a Swept Source Optical Coherence Tomography system (SS-OCT), the SS-OCT system including: a light source, tunable over a spectral band, that generates a coherent light signal; an optical interferometer for dividing the coherent light signal into a reference arm leading to a reference reflector and a sample arm leading to a sample; an optical element to selectively direct a sample light signal exiting the sample arm to a specific portion of the sample, so that for each selection in the optical element a different specific portion of the sample is illuminated; an optical detector for detecting an interference signal generated by a combination of reference and sample returning signals from the reference arm and from the sample arm, reflected by the reference reflector and the sample, respectively; Wherein, for the same selection operated at the optical element level illuminating a specific portion of the sample, the method further comprises: sweeping the light source for a time interval ΔT, so that a wavelength of the coherent light signal, leading to the sample light signal illuminating the specific portion of the sample, changes from a minimum wavelength to a maximum wavelength and wherein the wavelength of the coherent light signal reaches the same value between the minimum wavelength to the maximum wavelength at least twice during the sweeping; detecting the interference signal generated by the sweeping, including the interference signal generated by the sample returning signals of the at least two coherent light signals having the same wavelength; elaborating the detected interference signal generated by the sweeping, including the detected interference signal generated by the sample returning signals of the at least two coherent light signals having the same wavelength, for obtaining an OCT image of the specific portion of the sample.

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