Having A Short Coherence Length Source Patents (Class 356/479)
  • Patent number: 10921718
    Abstract: A position encoder for monitoring relative movement between a first object and a second object includes a grating that is coupled to the first object, and an image sensor assembly that is coupled to the second object. The image sensor includes a first image sensor; a second image sensor that is spaced apart from the first image sensor; an optical element that includes a first optical surface and a second optical surface that is spaced apart from the first optical surface; and an illumination system.
    Type: Grant
    Filed: December 14, 2018
    Date of Patent: February 16, 2021
    Inventors: Zhiqiang Liu, Eric Goodwin, Goldie Goldstein
  • Patent number: 10921247
    Abstract: An optical receiver is provided that includes an array of photoreceivers. Each photoreceiver may be configured to receive a respective portion of a speckle pattern generated by interaction between an object beam and a scattering medium and each photoreceiver may be configured to generate respective electrical detection signals for provision to processing circuitry for summing of the electrical detection signals. A photoreceiver may include a collector, first detector and second detectors, and first and second optical splitters. The photoreceiver may be configured to generate a first electrical detection signal and a second electrical detection signal based on a received portion of the speckle pattern.
    Type: Grant
    Filed: August 20, 2019
    Date of Patent: February 16, 2021
    Assignee: The Johns Hopkins University
    Inventors: Jeremiah J. Wathen, Scott M. Hendrickson, Tomasz M. Kott, David W. Blodgett
  • Patent number: 10891748
    Abstract: A method of processing optical coherence tomography (OCT) scans through a subject's skin, the method comprising: receiving a plurality of scans through the subject's skin, the scans representing an OCT signal in slices through the user's skin at different times; comparing the scans to determine time-varying regions in the scans; determining a depth-distribution of the time varying regions.
    Type: Grant
    Filed: February 17, 2016
    Date of Patent: January 12, 2021
    Assignee: Michelson Diagnostics Ltd.
    Inventors: Jonathan D. Holmes, Richard Whitehead
  • Patent number: 10890433
    Abstract: A thickness measuring apparatus for measuring a thickness of a wafer includes a light source emitting light having a transmission wavelength region to the wafer, a focusing unit applying the light emitted from the light source to the wafer held on a chuck table, an optical branching section branching the light reflected on the wafer held on the chuck table, a diffraction grating diffracting the reflected light branched by the optical branching section to obtain diffracted light of different wavelengths, an image sensor detecting an intensity of the diffracted light obtained by the diffraction grating to produce a spectral interference waveform, and a computing unit computing the spectral interference waveform produced by the image sensor to output thickness information.
    Type: Grant
    Filed: September 24, 2019
    Date of Patent: January 12, 2021
    Inventors: Nobuyuki Kimura, Keiji Nomaru
  • Patent number: 10876972
    Abstract: An improved hyperspectral Raman imaging system and device that obtains full scale Raman images from a sample surface in seconds, wherein the dichromic mirror is located between the objective lens and sample surface. The laser is delivered to the sample surface and the Raman image is collected and transmitted through optic fiber to a camera after filtration. By delivering the laser to the sample without going through the objective lens, a high-power laser can safely illuminate the full field of view of the objective lens, allowing for safe Raman imaging within seconds. This fast and safe Raman imaging system can be used for, among other applications, the early detection of dental caries in practical settings.
    Type: Grant
    Filed: May 30, 2019
    Date of Patent: December 29, 2020
    Assignee: Jackson State University
    Inventor: Shan Yang
  • Patent number: 10849495
    Abstract: An optical coherence tomography (OCT) system includes: a light source; a multi-focal delay line; and a light detector. The multi-focal delay line includes: a positive lens; and an optical switch configured to: receive a light from the light source; selectively direct the sample light to the positive lens via a selected one of a plurality of light interfaces each located a different distance from the focal plane of the positive lens; and direct the sample light to an object to be measured. The light detector is configured to receive return light returned from the object to be measured in response to the sample light, and to receive a reference light produced from the light from the light source, and in response thereto to detect at least one interference signal. An associated OCT method may be performed with the OCT system.
    Type: Grant
    Filed: October 1, 2018
    Date of Patent: December 1, 2020
    Assignee: AMO Development, LLC
    Inventors: Paul Pulaski, Daniel R. Neal, Thomas D. Raymond, Stephen W. Farrer, Daniel R. Hamrick, Richard J. Copland
  • Patent number: 10849595
    Abstract: An imaging apparatus is disclosed for diagnosis including a plurality of transmitting and receiving units, an error of a scale of a tomographic image to be generated is reduced. The imaging apparatus can include including acquisition means for acquiring a propagation velocity of an ultrasound signal of a flushing liquid, generation means for generating ultrasound line data based on the propagation velocity of the ultrasound signal in a blood vessel tissue, and conversion means for converting positional information of each position within a range in which the flushing liquid flows regarding the ultrasound line data generated by the generation means based on a ratio between the propagation velocity in the blood vessel tissue and the propagation velocity in the flushing liquid. A tomographic image of a blood vessel is constructed by using the ultrasound line data converted by the conversion means.
    Type: Grant
    Filed: October 1, 2015
    Date of Patent: December 1, 2020
    Inventors: Ema Itoh, Isao Mori
  • Patent number: 10845588
    Abstract: In an optical scanner 100, a vibration portion 101 includes first and third elements 3021 and 3023 that vibrate a light guide path 102 in a direction substantially perpendicular to an optical axis direction, and second and fourth elements 3022 and 3024 that vibrate the light guide path in a direction substantially perpendicular to a vibration direction thereof. A driving signal is applied to each of electrodes 3011 to 3014, each of which corresponds to one electrode of each of the first to fourth elements, and the other electrode 3015 is used as a common electrode having a floating potential. A driving signal generator 1007 generates a driving signal such that a median value of driving signals Vy1and Vy2 applied to the first and third elements and a median value of driving signals Vx1 and Vx2 applied to the second and fourth elements correspond to substantially the same value.
    Type: Grant
    Filed: December 13, 2018
    Date of Patent: November 24, 2020
    Assignee: HITACHI, LTD.
    Inventors: Takahiro Matsuda, Yoshiho Seo, Satoshi Ouchi, Shinsuke Onoe
  • Patent number: 10846892
    Abstract: An apparatus includes: an acquisition unit configured to acquire pieces of three-dimensional data of a subject eye obtained at different times, the three-dimensional data including pieces of two-dimensional data obtained at different positions; a first planar alignment unit configured to perform first planar alignment including alignment between the pieces of three-dimensional data in a plane orthogonal to a depth direction of the subject eye; a first depth alignment unit configured to perform first depth alignment including alignment between pieces of two-dimensional data in at least one piece of three-dimensional data among the pieces of three-dimensional data and further including alignment between the pieces of three-dimensional data in the depth direction; and a generation unit configured to generate interpolation data of at least one piece of three-dimensional data among the pieces of three-dimensional data by using a result of the first planar alignment and a result of the first depth alignment.
    Type: Grant
    Filed: September 4, 2018
    Date of Patent: November 24, 2020
    Inventors: Yoshihiko Iwase, Hiroki Uchida
  • Patent number: 10838150
    Abstract: A coupling interface arrangement is described for a photonic integrated circuit (PIC) device. The PIC includes an interface coupling surface having optical grating elements arranged to form optical output locations that produce corresponding light output beams. A coupling lens couples the light output beams into a conjugate plane at a far-field scene characterized by one or more optical aberrations that degrade optical resolution of the light outputs. The optical grating elements are configured to correct for the one or more optical aberrations.
    Type: Grant
    Filed: November 28, 2018
    Date of Patent: November 17, 2020
    Assignee: The Charles Stark Draper Laboratory, Inc.
    Inventors: Michael G. Moebius, Steven J. Byrnes, Steven J. Spector, Francis J. Rogomentich, Matthew A. Sinclair
  • Patent number: 10835124
    Abstract: Disclosed is a polarization sensitive optical coherence tomography apparatus and control method thereof. According to the polarization sensitive optical coherence tomography apparatus and control method thereof of the present invention, the local phase delay value of each layer of a multiple of layers using Jones matrix for a birefringent material having the multiple of layers where each layers optical axis is random based on a polarized signal detected in an optical detector may be calculated. According to the present invention, a skin aging level can be accurately examined by obtaining an accurate accumulated phase delay value for a multiple of layers of birefringent material having a random optical axis.
    Type: Grant
    Filed: June 3, 2015
    Date of Patent: November 17, 2020
    Inventors: Jun Lee, Jungho Chung
  • Patent number: 10830667
    Abstract: Described are systems and techniques for characterizing optical fibers. Disclosed systems and techniques employ optical metrology, functional metrology, or both to characterize microstructured optical fibers and determine fiber characteristics, errors, and quality control metrics. The characteristics, errors, and quality control metrics are useful for improving the manufacturing of optical fibers.
    Type: Grant
    Filed: May 16, 2019
    Date of Patent: November 10, 2020
    Assignee: Magic Leap, Inc.
    Inventors: Timothy Mark Dalrymple, Andrew C. Duenner, Mark Schmitt
  • Patent number: 10816789
    Abstract: Some embodiments of a device comprise a light-guiding component; an optical-focusing component, wherein the light-guiding component and the optical-focusing component are aligned on an optical axis; and an optical-correction component that includes a reflecting surface and a correction surface.
    Type: Grant
    Filed: January 24, 2018
    Date of Patent: October 27, 2020
    Assignee: Canon U.S.A., Inc.
    Inventor: Badr Elmaanaoui
  • Patent number: 10809050
    Abstract: Various optical systems equipped with diode laser light sources are discussed in the present application. One example system includes a diode laser light source for providing a beam of radiation. The diode laser has a spectral output bandwidth when driven under equilibrium conditions. The system further includes a driver circuit to apply a pulse of drive current to the diode laser. The pulse causes a variation in the output wavelength of the diode laser during the pulse such that the spectral output bandwidth is at least two times larger the spectral output bandwidth under the equilibrium conditions.
    Type: Grant
    Filed: October 30, 2019
    Date of Patent: October 20, 2020
    Inventors: Alexandre R. Tumlinson, Nathan Shemonski, Yuan Liu
  • Patent number: 10809750
    Abstract: An optical probe includes an optical source that generates an optical beam that propagates from a proximal end to a distal end of an optical fiber that imparts a transformation of a spatial profile of the optical beam. An optical control device imparts a compensating spatial profile on the optical beam that at least partially compensates for the transformation of the spatial profile of the optical beam imparted by the optical fiber in response to a control signal from a signal processor. A distal optical source generates a calibration light that propagates through the one or more optical waveguides from the distal end to the proximal end of the optical fiber. An optical detector detects the calibration light and generates electrical signals in response to the detected calibration light.
    Type: Grant
    Filed: July 28, 2019
    Date of Patent: October 20, 2020
    Assignees: OFS Fitel, LLC
    Inventors: Eric Swanson, Tristan Kremp, Paul S. Westbrook, David DiGiovanni
  • Patent number: 10799111
    Abstract: Systems and methods for improved interferometric imaging are presented. One embodiment is a partial field frequency-domain interferometric imaging system in which a light beam is scanned in two directions across a sample and the light scattered from the object is collected using a spatially resolved detector. The light beam could illuminate a spot, a line or a two-dimensional area on the sample. Additional embodiments with applicability to partial field as well as other types of interferometric systems are also presented.
    Type: Grant
    Filed: June 9, 2015
    Date of Patent: October 13, 2020
    Inventors: Tilman Schmoll, Alexandre R. Tumlinson, Matthew J. Everett, Nathan Shemonski
  • Patent number: 10800899
    Abstract: A method to reversibly assembly micro and nanostructures with a force provided by light inside a host medium which behaves as solid during steady state and as a fluid during assembly state. The host medium is a material capable to change from solid to fluid state during assembly and from fluid to solid state during fixation. The change in state at the host medium is controlled with the temperature and/or shear strain.
    Type: Grant
    Filed: June 22, 2016
    Date of Patent: October 13, 2020
    Inventor: Yunuen Montelongo Flores
  • Patent number: 10801830
    Abstract: The present invention aims to obtain a tomographic image free from image noise due to reflection on a container wall surface and having a good image quality by a simple configuration. In a FD-OCT imaging apparatus which images an imaging object stored in a container having an optical transparent wall part tomographically, when the focal depth is set such that a distance D from a first surface Sa of the wall part on the side of the imaging object to a focal point FP of the objective optical system is smaller than a predetermined threshold value smaller than a thickness T of the wall part, the distance between a second surface Sb of the wall part on a side opposite to the imaging object out of the wall surfaces and a reference plane which is perpendicular to the optical path of the illumination light and to which an optical path length is equal is set a value equal to the thickness of the wall part.
    Type: Grant
    Filed: November 24, 2017
    Date of Patent: October 13, 2020
    Inventors: Keisuke Kato, Naoki Ishikawa
  • Patent number: 10794763
    Abstract: An optical system having an OAP mirror collimator is disclosed with a housing, an OAP mirror located within the housing and has an optical axis, a fold plane and a focal point. A fiber optical cable is coupled to the housing and has first and second optical fibers, each having an exit end that form a common end face of the fiber optic cable, wherein the fiber optical cable is rotationally and translationally aligned to the OAP mirror such that the common face is perpendicular to and centered upon the optical axis of the OAP mirror and positioned a fixed distance from the focal point, and wherein the optical axes of the first and second optical fibers are jointly angularly aligned to the fold plane, and the optical axes of the first and second optical fibers deviate from being parallel to the optical axis by no more than 0.15 degrees.
    Type: Grant
    Filed: February 11, 2020
    Date of Patent: October 6, 2020
    Assignee: Verity Instruments, Inc.
    Inventors: Mark A. Meloni, John D. Corless
  • Patent number: 10790899
    Abstract: An indexing system includes an indexing component; a redundant optical path; and a fiber tap arrangement. Multiple indexing components can be daisy-chained together in the indexing system. The redundant optical path is created between any forward port and any rearward port in the network. Multiple redundant optical paths can be created within the network. One or more tap arrangements can be disposed along each redundant optical path. Accordingly, feed signals in a bidirectional indexing environment can be supplied to each drop line along the redundant optical path from either direction without recabling.
    Type: Grant
    Filed: January 11, 2018
    Date of Patent: September 29, 2020
    Assignee: CommScope Technologies LLC
    Inventor: Erik J. Gronvall
  • Patent number: 10775569
    Abstract: An optical connector comprises a first optical waveguide including a plurality of cores each extending along a first direction, the first optical waveguide having a first end face, wherein the cores are arranged on the first end face at positions except a position of a central axis of the first optical waveguide, and a first lens having a second end face and a third end face in the first direction, the first lens having an optical axis extending along the first direction. The first optical waveguide and the first lens are arranged so that the central axis of the first optical waveguide coincides with the optical axis of the first lens. The second end face is positioned facing the first end face, and the third end face extends along a plane perpendicular to an optical axis of the first optical waveguide.
    Type: Grant
    Filed: September 7, 2017
    Date of Patent: September 15, 2020
    Inventors: Tetsu Morishima, Osamu Shimakawa
  • Patent number: 10754134
    Abstract: A biological tissue inspection apparatus is disclosed. The biological tissue inspection apparatus comprises a stage and a probe. The probe comprises an optical imaging device, an optical interference detector, and a light guide. The probe acquires data regarding optical images and optical interference, through the optical imaging device and the optical interference detector. The stage or the probe moves such that a selected area of the inspection object is positioned in the FOV of the optical imaging device and of the optical interference detector. The light guide is configured such that illumination light from the optical imaging device and measurement light from the optical interference detector are coaxially emitted to the inspection object.
    Type: Grant
    Filed: May 12, 2017
    Date of Patent: August 25, 2020
    Inventors: Hong Ki Kim, Min Kyu Kim, Min Young Hwangbo
  • Patent number: 10743758
    Abstract: An OCT system for imaging multiple depth positions includes a light source, a sample arm and two or more reference arms. The sample arm propagates light to the object and directs object return light having a first return light beam from a first position and a second return light beam from a second position, the second return light having a dispersion level higher than the first return light beam by a dispersion difference amount. The first and second reference arms produce light beams having substantially the same dispersion as the first and second return light beams, respectively. The optical pathway combines all of the object return light and the reference light beams. An OCT detector measures the resulting interferogram. Imaging information is obtained for both the first position and the second position based on the dispersion difference amount.
    Type: Grant
    Filed: December 16, 2015
    Date of Patent: August 18, 2020
    Assignee: AMO Development, LLC
    Inventor: Georg Schuele
  • Patent number: 10741910
    Abstract: An optical system for producing an optical probe beam includes an optical source that generates a free-space optical beam. An optical element is positioned in a path of the free-space optical beam to project the free-space optical beam to generate a projected free-space optical beam. A photonic integrated phased-array component positioned in a path of the projected free-space optical beam to reflect the projected free space optical beam, thereby generating the optical probe beam. The photonic integrated phased-array component comprises a plurality of antenna elements and a substrate positioned proximate to the plurality of antenna elements, wherein the substrate includes a plurality of fan-out electrical connections from at least some of the plurality of antenna elements such that a size of a region comprising the fan-out electrical connections is larger than a size of a region comprising the plurality of antenna elements.
    Type: Grant
    Filed: June 26, 2018
    Date of Patent: August 11, 2020
    Inventor: Eric Swanson
  • Patent number: 10732263
    Abstract: The invention relates to a method for classifying an object (6) in a lateral surrounding area (5) of a motor vehicle (1), in which a signal is transmitted into the lateral surrounding area (5) by a sensor device (3) on-board the vehicle for monitoring the lateral surrounding area (5) and the signal reflected at the object (6) is received by said sensor device (3), wherein a monitoring area (E) of the sensor device (3) for monitoring the lateral surrounding area (5) is segmented into a first detection area (E1) and a second detection area (E2), wherein a first value for a distance (AL) from the object (6) to the motor vehicle (1) is defined on the basis of the signal received from the first detection area (E1) and it is determined whether the object (6) is a stationary object located laterally in relation to the motor vehicle (1), a second value for the distance (AL) from the object (6) to the motor vehicle (1) is determined on the basis of the signal received from the second detection area (E2) and it is defi
    Type: Grant
    Filed: June 2, 2016
    Date of Patent: August 4, 2020
    Assignee: Valeo Schalter und Sensoren GmbH
    Inventors: Christian Sturm, Urs Luebbert, Stefan Goerner
  • Patent number: 10732354
    Abstract: A system for analyzing a tissue sample includes two wavelength-division multiplexers and a fiber coupler. The first wavelength-division multiplexer combines visible and near infrared electromagnetic radiation and directs the combined electromagnetic radiation to the fiber coupler. The fiber coupler emits a sample beam of visible and near infrared electromagnetic radiation toward a tissue sample, and a reference beam of visible and near infrared electromagnetic radiation toward a reference mirror. The sample beam reflects off the tissue sample back to the fiber coupler. The reference beam reflects off the reference mirror back to the fiber coupler. The fiber coupler combines the reflected sample and reference beams and directs the combined electromagnetic radiation to the second wavelength-division multiplexer.
    Type: Grant
    Filed: June 6, 2019
    Date of Patent: August 4, 2020
    Inventors: Ji Yi, Weiye Song
  • Patent number: 10727862
    Abstract: A photonic monobit analog-to-digital converter (ADC) includes an incoherent optical source configured to generate an optical noise signal, an optical modulator, at least one coupler, a photodetector, a limiter, and a DSP. The optical modulator is configured to modulate an input optical signal using an analog input electrical signal to generate an optical modulated signal. The coupler is configured to couple the optical modulated signal with the optical noise signal to generate at least one coupled signal. The photodetector is configured to generate a phase difference between the optical modulated signal and the optical noise signal using the at least one coupled signal. The limiter is configured to generate a decision signal based on the phase difference, and the DSP is configured to output a digital signal representative of the analog input electrical signal based on the decision signal.
    Type: Grant
    Filed: March 20, 2019
    Date of Patent: July 28, 2020
    Assignee: Raytheon Company
    Inventors: Bishara Shamee, Steven R. Wilkinson
  • Patent number: 10717962
    Abstract: Provided is a method for non-invasively and quantitatively determining multilayerization and differentiation when culturing a cell sheet. Provided is a method for determining a cell state by imaging a cell sheet by using an optical instrument characterized by having a high resolution, and then analyzing the inner structure thereof.
    Type: Grant
    Filed: June 22, 2015
    Date of Patent: July 21, 2020
    Inventors: Naoko Senda, Kentaro Osawa
  • Patent number: 10705407
    Abstract: Aspects of the present disclosure describe systems, methods, and structures providing speckle reduction in photonic phased array structures.
    Type: Grant
    Filed: May 8, 2018
    Date of Patent: July 7, 2020
    Assignee: Analog Photonics LLC
    Inventors: Ehsan Hosseini, Michael Watts, Peter Russo
  • Patent number: 10677580
    Abstract: Optical coherence tomography (OCT) systems using a polarization switch and/or a polarization beam splitter are generally described. In an example, an OCT system includes a light source configured to emit a beam and an interferometer configured to receive the beam. The interferometer includes a reference path and an interferometer sample path. The OCT system further includes a polarization switch configured to selectively change a polarization state of the beam and a lens system that includes a first sample path and a second sample path. The polarization switch is further configured to direct the beam onto the first sample path upon selection of a first polarization state and to direct the beam onto the second sample path upon selection of a second polarization state that is different from the first polarization state.
    Type: Grant
    Filed: April 27, 2016
    Date of Patent: June 9, 2020
    Inventor: Changho Chong
  • Patent number: 10677581
    Abstract: The invention provides for generating a set of signature signals that correspond to a range of depths within a target. These signature signals can include multiple individual reference signals and be can modified to compensate for specific characteristics of the target. In the preferred embodiment the members of the set of signature signals are correlated with data sets by phase rotating individual reference signals to determine maximum and minimum correlation and thereby enabling determination of the scattering characteristic of the target at each depth. Also a pilot signal is monitored to dynamically determine the phase relationship between individual reference signals and thereby avail of phase sensitive detection techniques to enhance SNR at deeper regions where multiple individual reference signals exist.
    Type: Grant
    Filed: April 5, 2018
    Date of Patent: June 9, 2020
    Inventor: Joshua Noel Hogan
  • Patent number: 10678117
    Abstract: An optical phased array (OPA) may be included in a light detection and ranging (LiDAR) system and may be configured to perform beam steering. The OPA may include a cascading structure of splitters configured to enable a branch operation to be performed M times. Each splitter may split an input optical signal in a ratio of 1:1 and output the split input optical signal. The OPA may include a plurality of sets of first phase shifters (PSs), each set of first PSs located exclusively on one output end of a separate splitter, each set of first PSs including a particular quantity of first PSs based on a branch position at which the separate splitter is located. The OPA may be included in a LiDAR system that is further included in a vehicle that is configured to enable navigation of the vehicle, including autonomous navigation, through an environment.
    Type: Grant
    Filed: March 17, 2017
    Date of Patent: June 9, 2020
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Dong-jae Shin, Hyun-il Byun, Kyoung-ho Ha, Seong-gu Kim, Jin-kwon Bok, Jung-ho Cha, Dong-hyun Kim, Yong-sang Park, Min-kyung Kim
  • Patent number: 10667707
    Abstract: A microangiography method and system based on full-space modulation spectrum splitting and angle compounding is disclosed. Label-free three-dimensional optical coherence tomography angiography is realized by combining the three-dimensional space resolution capability of an optical coherence tomography and the motion recognition capability of a dynamic scattering technology. Probe light of different incident angles is encoded with a transverse scanning modulation spectrum in a spatial frequency domain, incident angle-resolved sub-angiograms which are independent of one another are obtained by splitting the modulation spectrum, and an angiogram with multiple space angles compounded is realized. Conjugate mirror images are removed from a depth (z) domain, a complex-valued OCT interference spectra are reconstructed, the full-space modulation spectrum is obtained in the spatial frequency domain, and the overlap of the modulation spectrum conjugate mirror images is avoided.
    Type: Grant
    Filed: April 20, 2016
    Date of Patent: June 2, 2020
    Inventors: Peng Li, Pei Li, Yuxuan Cheng, Liping Zhou, Zhihua Ding
  • Patent number: 10656336
    Abstract: A system for photonic computing, preferably including an input module, computation module, and/or control module, wherein the computation module preferably includes one or more filter banks and/or detectors. A photonic filter bank system, preferably including two waveguides and a plurality of optical filters optically coupled to one or more of the waveguides. A method for photonic computing, preferably including controlling a computation module, controlling an input module, and/or receiving outputs from the computation module.
    Type: Grant
    Filed: November 1, 2019
    Date of Patent: May 19, 2020
    Assignee: Luminous Computing, Inc.
    Inventor: Mitchell A. Nahmias
  • Patent number: 10627210
    Abstract: A method for interferometrically determining geometric and/or optical parameters of a cavity comprises the method steps of: tuning the frequency f of a coherent light source (10) over a frequency range ?f, deriving a target beam and a reference beam from the coherent light source (10), wherein the target beam passes through the cavity at least once, generating an interference signal I(f) which is dependent on the frequency f of the light source by superimposing the reference beam on the target beam, capturing an interference spectrum of the interference signal I(f) over the frequency range ?f of the frequency f of the coherent light source, evaluating a plurality of measurement points of the captured interference spectrum over the frequency range ?f by numerically fitting the measurement points to a mathematical function produced, and determining the geometric and/or optical parameters of the cavity (40, 45) by determining the parameters of the mathematical function produced.
    Type: Grant
    Filed: February 23, 2017
    Date of Patent: April 21, 2020
    Inventor: Björn Habrich
  • Patent number: 10614280
    Abstract: The invention provides a system and method for rapid validation of identity from tissue using registered two dimensional and optical coherence tomography (OCT) scan images. The preferred embodiment provides, for a human fingerprint, validation that the surface fingerprint matches the primary fingerprint. An alternate embodiment provides validation of “aliveness” by ascertaining blood flow. Various embodiments are taught.
    Type: Grant
    Filed: December 11, 2018
    Date of Patent: April 7, 2020
    Inventor: Joshua Noel Hogan
  • Patent number: 10610105
    Abstract: An optical probe, according to one embodiment, comprises: an optical fiber into which light for irradiating an object is incident from a light source; a lens which focuses the light incident into the optical fiber; and a wavefront modulator on which a pattern is formed so that the wavefront of the light incident into the optical fiber can be modulated, wherein the optical fiber, the lens, and the wavefront modulator are arranged on the same axis, the light passing through the wavefront modulator can form a focus on the same axis, and the resolution or focal depth of the light can be adjusted through a pattern design formed on the wavefront modulator.
    Type: Grant
    Filed: May 11, 2016
    Date of Patent: April 7, 2020
    Inventors: Hong Ki Yoo, Jun Young Kim, JingChao Xing
  • Patent number: 10571243
    Abstract: Various systems and methods for sequential angle illumination to achieve ultra-high resolution optical coherence tomography (OCT) images. One example OCT system includes a light source, a beam divider, sample arm optics, a detector, and a processor. The light source generates a light beam to illuminate the sample. The beam divider separates the light beam into reference and sample arms. The sample arm optics sequentially illuminates a location in the sample with the light beam from different angles. The detector receives light returned from the reference arm and the sample illuminated at each angle and generates signals. The processor combines the signals to generate an image, which has a transverse resolution that is higher than the transverse resolution achieved from the signal generated from a single angle.
    Type: Grant
    Filed: February 10, 2017
    Date of Patent: February 25, 2020
    Inventors: Matthew J. Everett, Tilman Schmoll, Nathan Shemonski, Alexandre R. Tumlinson
  • Patent number: 10568515
    Abstract: An OCT apparatus and method for characterization of a fluid adjacent to a tympanic membrane has a low coherence source which is coupled to a splitter which has a measurement path and a reference path. The reference path is temporally modulated for length, and the combined signals from the reference path and the measurement path are applied to a detector. The detector examines the width of the response and the time variation when an optional excitation source is applied to the tympanic membrane, the width of the response and the time variation forming a metric indicating the viscosity of a fluid adjacent to the tympanic membrane being measured.
    Type: Grant
    Filed: June 21, 2016
    Date of Patent: February 25, 2020
    Assignee: OtoNexus Medical Technologies, Inc.
    Inventors: Mark A. Moehring, Jay A. Chesavage
  • Patent number: 10565774
    Abstract: For visualization in medical imaging, a hybrid volume (22) and surface (24) renderer (16) uses unified ray tracing. Rather than separately rasterizing the surface (24) and ray tracing the volume (22), a same ray or set of rays is used for both the volume (22) and the surface (24). Various effects may be modeled by determining (34) the intersection of the ray with the surface (24) or surfaces (24) and integrating (36) the volume (22) data in parallel. For medical imaging (38), more complex effects, interactive rendering, and/or real-time rendering may be provided by altering the integration for ray tracing based on the detected intersections.
    Type: Grant
    Filed: March 9, 2015
    Date of Patent: February 18, 2020
    Assignee: Siemens Healthcare GmbH
    Inventor: Kaloian Petkov
  • Patent number: 10557700
    Abstract: Techniques and apparatus for selectively producing half-depth and full-depth OCT images, based on a swept-source OCT interference signal. An example method comprises selecting from a first sampling rate and a second sampling rate, the second sampling rate being twice the first sampling rate, and sampling the swept-source Optical Coherence Tomography (OCT) interference signal at the selected sampling rate, using a k-clock signal having a frequency range corresponding to the first sampling rate, to produce a sampled OCT interference signal. The method further comprises processing the sampled OCT interference signal to obtain an OCT image, such that the resulting OCT image is a half-depth image in the event the first sampling rate is selected and a full-depth image in the event the second sampling rate is selected.
    Type: Grant
    Filed: January 12, 2018
    Date of Patent: February 11, 2020
    Assignee: Novartis AG
    Inventors: Muhammad K Al-Qaisi, Guy Holland
  • Patent number: 10551245
    Abstract: Exemplary spectrally encoded probes are provided having forward view capabilities. These probes are configured such that the detection element comprises a plurality of light collecting components, where the distal ends at least partially surround the illumination element and the proximal ends form a linear array that is optically connected to a dispersive component.
    Type: Grant
    Filed: February 10, 2017
    Date of Patent: February 4, 2020
    Inventors: Dukho Do, Dongkyun Kang, Mitsuhiro Ikuta, Guillermo J. Tearney
  • Patent number: 10548480
    Abstract: An image processing apparatus of the invention is for generating a tomographic image corresponding to a cross-section of an imaging object. The image processing apparatus 1 comprises: a data acquisitor 20 which obtains image data corresponding to a plurality of imaging with respect to the imaging object; and an image generator 30 which generates the tomographic image corresponding to the cross-section parallel to the depth direction based on the image data. The plurality of imaging are performed with mutually different focus positions in a depth direction and imaging ranges overlapped in the depth direction. The image generator 30 sets a value of each pixel in the tomographic image at a value obtained by a calculation process between the image data of a same position of the imaging object corresponding to the pixel obtained at each of the plurality of imaging.
    Type: Grant
    Filed: August 31, 2017
    Date of Patent: February 4, 2020
    Inventor: Naoki Ishikawa
  • Patent number: 10537389
    Abstract: The present technology relates to a surgical system, an image processing device, and an image processing method capable of obtaining the posture of an eye more firmly and with a high degree of accuracy. An image information acquisition unit acquires a tomographic image that is a cross-sectional image taken in a direction substantially parallel to an eye axis direction of an eye of a patient. An image recognition unit recognizes each part of the eye on the tomographic image by means of image recognition on the basis of the tomographic image. The control unit calculates the posture of the eye on the basis of the result of recognition of each part of the eye. In this way, by recognizing each part of the eye on the basis of the tomographic image and calculating the posture of the eye on the basis of the result of recognition, the posture of the eye can be obtained more firmly and with a high degree of accuracy. The present technology can be applied to a surgical system.
    Type: Grant
    Filed: May 12, 2016
    Date of Patent: January 21, 2020
    Inventor: Tomoyuki Ootsuki
  • Patent number: 10512433
    Abstract: Provided is a correction data generation method that includes acquiring captured image data by imaging an indicator that is related to a predetermined illness; plotting a real imaging data point that corresponds to the acquired captured image data in a predetermined color space that is associated with the predetermined illness in accordance with a color component of the data point; calculating a correction value for correcting the values of pixels that make up a captured image captured by an electronic endoscope based on the distance between the data point and a predetermined target point in the predetermined color space; and storing the calculated correction value.
    Type: Grant
    Filed: February 3, 2017
    Date of Patent: December 24, 2019
    Inventors: Yousuke Ikemoto, Tadashi Minakuchi, Atsushi Komoro, Toshio Tachibana, Yoichi Hitokata, Noriko Ota
  • Patent number: 10502544
    Abstract: An efficient OCT data collection and processing method for obtaining a high-axial-resolution image with explicit ranging over an extended depth is described. The method includes collecting a first dataset at a transverse location of the sample. The first dataset comprises spectra of a bandwidth (?k1) sampled at a spectral sampling interval (dk1). A second dataset comprising spectra of a bandwidth (?k2) sampled at a spectral sampling interval (dk2) is collected. The bandwidth ?k2 is less than ?k1 and spectral sampling interval dk2 is less than dk1. The first and the second datasets are processed to generate at least one A-scan with an axial resolution higher than the axial resolution corresponding to the bandwidth ?k2 and a depth range larger than the depth range provided by sampling interval dk1.
    Type: Grant
    Filed: June 14, 2017
    Date of Patent: December 10, 2019
    Inventors: Yuan Liu, Nathan Shemonski, Matthew J. Everett
  • Patent number: 10495438
    Abstract: A measurement device includes: an optical system that splits incident light into two lights to emit one light as measurement light to a measurement object and the other light as reference light to a reference surface, and recombines the two lights to emit combined light; a light emitter that emits light entering the optical system; an imaging system that takes an image of output light emitted from the optical system; and a processor that executes measurement with regard to a predetermined measurement area of the measurement object, based on an interference fringe image taken by the imaging system, wherein the processor: obtains complex amplitude data at a predetermined position in an optical axis direction at predetermined intervals in at least a predetermined range in the optical axis direction, with regard to a specific area set in advance in the measurement area based on the interference fringe image.
    Type: Grant
    Filed: February 19, 2019
    Date of Patent: December 3, 2019
    Inventors: Hiroyuki Ishigaki, Takahiro Mamiya
  • Patent number: 10488179
    Abstract: The invention relates to a method for signal processing in optical coherence tomography by means of a tunable light source (swept source), comprising the following steps: tuning the light source and sensing a signal intensity of the light source in linear dependence on the respective wave number (k) of the tunable light source and producing a signal intensity distribution in dependence on k; applying a window function to the sensed signal intensity distribution and producing a weighted signal intensity distribution; and applying a fast Fourier transform (FFT) to the weighted signal intensity distribution; and characterized in that, in the tuning of the light source, the tuned frequency spectrum is limited to a passband of the window function.
    Type: Grant
    Filed: January 19, 2017
    Date of Patent: November 26, 2019
    Assignee: Heidelberg Engineering GmbH
    Inventors: Björn Martensen, Andreas Fritz
  • Patent number: 10474002
    Abstract: In one aspect, a method is provided for generating supercontinuum laser pulses within a continuous mid-infrared spectral range in a chalcogenide material. This method includes focusing an input laser beam of femtosecond pulses with a pulse energy higher than 10 microjoule along an optical path of the input laser beam; placing a chalcogenide material at a selected location along the optical path of the laser beam so that the laser intensity at the chalcogenide material is sufficiently high to cause nonlinear optical absorption that causes conversion of input optical energy into supercontinuum laser pulses of a pulse energy at or above a microjoule level at optical wavelengths within a broad continuous mid-infrared spectral range without damaging the chalcogenide material; and simultaneously moving the chalcogenide material laterally relative to the input laser beam to avoid damage to the chalcogenide material.
    Type: Grant
    Filed: June 27, 2016
    Date of Patent: November 12, 2019
    Assignee: Cornell University
    Inventors: Poul B. Petersen, Ashley Stingel
  • Patent number: 10470656
    Abstract: Devices, systems, and methods that utilize electroactive polymer actuators to impart motion to an optical fiber positioned within an imaging probe are provided. In some embodiments, an ophthalmic imaging apparatus comprises an optical probe having a handle sized and shaped for handheld grasping by a user; and a cannula coupled to the handle, the cannula sized and shaped for insertion into an eye to be treated; an optical fiber positioned at least partially within the optical probe, the optical fiber configured to receive an imaging light from an imaging light source and guide the imaging light to an optical element positioned within the cannula of the optical probe; and an actuator system configured to impart motion to the optical fiber, the actuator system including an electroactive polymer (EAP) actuator positioned within the optical probe.
    Type: Grant
    Filed: December 20, 2013
    Date of Patent: November 12, 2019
    Assignee: Novartis AG
    Inventor: Barry L. Wheatley