Of Light Interference (e.g., Interferometer) Patents (Class 356/28.5)
  • Patent number: 10488496
    Abstract: A lidar system can include a light source that emits a pulse of light and a splitter that splits the pulse of light into two or more pulses of angularly separated light. The lidar system can also include a scanner configured to scan pulses of light along a scanning direction across a plurality of pixels located downrange from the lidar system. The lidar system can also include a detector array with a first detector and a second detector. The first and second detectors can be separated by a detector-separation distance along a direction corresponding to the scanning direction of the light pulses. The first detector can be configured to detect scattered light from the first pulse of light and the second detector can be configured to detect scattered light from the second pulse of light.
    Type: Grant
    Filed: November 3, 2016
    Date of Patent: November 26, 2019
    Assignee: Luminar Technologies, Inc.
    Inventors: Scott R. Campbell, Jason M. Eichenholz, Lane A. Martin, Matthew D. Weed
  • Patent number: 10483717
    Abstract: An assembly (14) for analyzing a sample (15) includes a detector assembly (18); a tunable laser assembly (10); and (iii) a laser controller (10F). The detector assembly (18) has a linear response range (232) with an upper bound (232A) and a lower bound (232B). The tunable laser assembly (10) is tunable over a tunable range, and includes a gain medium (10B) that generates an illumination beam (12) that is directed at the detector assembly (18). The laser controller (10F) dynamically adjusts a laser drive to the gain medium (10B) so that the illumination beam (12) has a substantially constant optical power at the detector assembly (18) while the tunable laser assembly (10) is tuned over at least a portion of the tunable range.
    Type: Grant
    Filed: October 15, 2018
    Date of Patent: November 19, 2019
    Inventors: Miles James Weida, William Chapman, Bruce Coy
  • Patent number: 10473768
    Abstract: Embodiments may include methods and systems for obtaining location information regarding an object. In one example, a laser pulse may be generated. The laser pulse may be divided into a plurality of laser pulse signals. Each of the laser pulse signals may be provided to a corresponding delay path, each delay path having a different length. An output of each delay path may be directed to the object. A plurality of reflected time-separated laser pulse signals from the object may be detected. The plurality of time-separated laser pulse signals may be combined to provide a recombined laser pulse signal. The recombined laser pulse signal may be resolved to generate object location information regarding the object.
    Type: Grant
    Filed: February 6, 2017
    Date of Patent: November 12, 2019
    Inventors: Gregory C. Walsh, Alan Aindow
  • Patent number: 10466024
    Abstract: The system and method for accurately determining range-to-go for the command detonation of a projectile warhead. Using dual laser detectors on the tail and on the nose of a spinning projectile to determine the range-to-go, time-to-go, or lateral offset from the projectile to the target. The method for controlling a projectile warhead uses a large area PIN detector and an ogive window. If the PIN detector is large enough to capture the second laser signal, the window is no longer an optical element, only a window thereby drastically reducing the cost of the system. In some cases the detector on the nose of the projectile comprises several PIN diodes placed around the projectile as a distributed aperture. Distributed apertures may also be created by placing the PIN diodes on the wing roots or body of the projectile.
    Type: Grant
    Filed: September 6, 2018
    Date of Patent: November 5, 2019
    Assignee: BAE Systems Information and Electronic Systems Integration Inc.
    Inventors: Michael J. Choiniere, Bruce Winker
  • Patent number: 10444366
    Abstract: A lidar sensor comprising a laser, an optical sensor, and a processor. The lidar sensor can determine a distance to one or more objects. The lidar sensor can optionally embed a code in beams transmitted into the environment such that those beams can be individually identified when their corresponding reflection is received.
    Type: Grant
    Filed: March 11, 2019
    Date of Patent: October 15, 2019
    Assignee: Perceptive Inc.
    Inventor: Alberto Stochino
  • Patent number: 10408853
    Abstract: A velocimeter configured to detect light modulated by a moving object with a Doppler effect and measure a velocity of the object includes a detector configured to detect the light, and a processor configured to perform binarization of a signal obtained by the detector, and measure a time duration over a predetermined number of pulse intervals in the signal obtained by the binarization to obtain a measurement value of the velocity. The processor is configured to determine the measurement value as an error based on a change in an index relating to the time duration.
    Type: Grant
    Filed: June 29, 2016
    Date of Patent: September 10, 2019
    Inventors: Takayuki Uozumi, Hiroshi Koike
  • Patent number: 10398006
    Abstract: An object detection apparatus includes a light emission unit including a light source to emit light, a light receiving unit including a light detector to receive light reflected from an object, a signal processing unit including a signal detector to be input with an output signal of the light detector or a signal acquired by processing the output signal of the light detector, and a control unit to set at least one area in a light emission region of the light emission unit as a target area, and to set at least one of a light emission condition of the light emission unit and a processing condition of the signal processing unit such that the at least one of the light emission condition and the processing condition are different between when the light is emitted to the target area and when the light is emitted to a background area.
    Type: Grant
    Filed: March 9, 2017
    Date of Patent: August 27, 2019
    Assignee: Ricoh Company, Ltd.
    Inventor: Tadashi Nakamura
  • Patent number: 10388006
    Abstract: Synthetic aperture (SA) imaging methods and systems are assisted by three-dimensional (3D) beam scanning imaging, for example scanning lidar. The methods can include concurrently acquiring an SA image and a 3D scanning image of a target region, determining an elevation map of the target region from the 3D scanning image, and processing the SA image based on the elevation map to provide or enhance 3D imaging capabilities in the SA image. In some implementations, the SA image is a two-dimensional (2D) SA image and the elevation map is used to orthorectify the 2D SA image. In other implementations, the SA image is a phase-wrapped 3D SA image resulting from the combination of two or more 2D SA images and the elevation map is used to perform phase unwrapping on the phase-wrapped 3D SA image.
    Type: Grant
    Filed: May 31, 2017
    Date of Patent: August 20, 2019
    Inventor: Simon Turbide
  • Patent number: 10379135
    Abstract: Techniques are disclosed for enabling a wind-sensing optical scope to communicate with external components to provide for a ballistic solution. Techniques may further incorporate cost saving features such as the utilization of a photo diode and/or other features. The wind-sensing optical scope may include various sensors to collect data for the ballistic solution, and/or data from external sensors may be used. Techniques may further incorporate range finding in the wind-sensing optical scope, depending on desired functionality.
    Type: Grant
    Filed: March 9, 2016
    Date of Patent: August 13, 2019
    Assignee: Cubic Corporation
    Inventors: Tony Maryfield, Mahyar Dadkhah
  • Patent number: 10379028
    Abstract: The invention describes a laser sensor module (100) which is adapted to detect or determine at least two different physical parameters by means of self-mixing interference by focusing a laser beam to different positions. Such a laser sensor module (100) may be used as an integrated sensor module, for example, in mobile devices (250). The laser sensor module (100) may be used as an input device and in addition as a sensor for detecting physical parameters in an environment of the mobile communication device (250). One physical parameter in the environment of the mobile communication device (250) may, for example, be the concentration of particles in the air (air pollution, smog . . . ). The invention further describes a related method and computer program product.
    Type: Grant
    Filed: July 15, 2016
    Date of Patent: August 13, 2019
    Inventors: Johannes Hendrikus Maria Spruit, Alexander Marc Van Der Lee, Gerben Kooijman, Okke Ouweltjes, Joachim Wilhelm Hellmig, Arnoldus Johannes Martinus Jozeph Ras, Petrus Theodorus Jutte
  • Patent number: 10330907
    Abstract: The cell imaging control device includes a cell detection unit 22 that acquires a cell image by imaging transmitted light or reflected light of undyed cells and detects the cells or structures in the cells in the cell image and an autofocus control unit 24 that calculates an autofocus evaluation value based on image information of the cells or the structures detected by the cell detection unit 22 and outputs an autofocus control signal based on the autofocus evaluation value to an imaging device for capturing the cell image, which is an imaging device having an autofocus function.
    Type: Grant
    Filed: September 21, 2016
    Date of Patent: June 25, 2019
    Assignee: FUJIFILM Corporation
    Inventor: Takayuki Tsujimoto
  • Patent number: 10320462
    Abstract: Techniques in a node of a wireless communications network, where one or more wireless devices are served via beams transmitted by network nodes. An example method comprises estimating (910), for a wireless device operating in the wireless communications network, a Doppler shift associated with movement of the wireless device, or a Doppler spread associated with movement of the wireless device, or both. The method further comprises, based on said estimating, evaluating (920) a change in estimated Doppler shift associated with the wireless device or evaluating the estimated Doppler spread associated with the wireless device, or both, and adjusting (930) at least one mobility-related parameter, based on said evaluating of the change in estimated Doppler or the evaluating of the estimated Doppler spread, or both. The method further comprises carrying (940) out one or more mobility procedures for the wireless device, based on the adjusted at least one mobility-related parameter.
    Type: Grant
    Filed: June 7, 2016
    Date of Patent: June 11, 2019
    Assignee: Telefonaktiebolaget LM Ericsson (publ)
    Inventors: Torgny Palenius, Magnus Sandgren
  • Patent number: 10302768
    Abstract: A method for facilitating removal of multipath signal interference from light data can comprise illuminating, with an illumination unit, a target with a light source. The illumination unit can be configured to project a high spatial-frequency pattern onto the target in such a way as to redistribute spectral energy to higher frequencies. The method can also comprise acquiring, with a sensor unit, reflected light data reflected from the target. The reflected light data can comprise an array of spatial domain information received from light reflected by the target. Further, the method can comprise processing, with the one or more processors, the reflected light data. The processing applies a high-pass filter within the spatial domain to the reflected light data.
    Type: Grant
    Filed: May 9, 2016
    Date of Patent: May 28, 2019
    Assignee: Microsoft Technology Licensing, LLC
    Inventors: John Peter Godbaz, Mirko Schmidt, Cyrus S. Bamji
  • Patent number: 10299682
    Abstract: A system and method of performing ultrasound modulated optical tomography. Ultrasound is delivered into a target voxel in an anatomical structure, and sample light is delivered into the anatomical structure, whereby a portion of the sample light passing through the target voxel is scattered by the biological tissue as signal light, and a portion of the sample light not passing through the target voxel is scattered by the anatomical structure as background light. The ultrasound and sample light are pulsed in synchrony, such that only the signal light is frequency shifted by the ultrasound. Multiple pulses of the sample light are delivered into the anatomical structure for each pulse of the ultrasound delivered into the target voxel. Reference light is combined with the signal light and background light to generate an interference light pattern, which is sequentially modulated to generate different interference light patterns, which are detected.
    Type: Grant
    Filed: December 15, 2017
    Date of Patent: May 28, 2019
    Assignee: HI LLC
    Inventors: Changhuei Yang, Adam Marblestone, Jamu Alford, Daniel Sobek
  • Patent number: 10294919
    Abstract: Predictively adjusting the pitch of blades and/or sections of a blade based on fluid velocity measurements. In one embodiment, the measurements are obtained of an upstream portion of a fluid flow using a laser Doppler velocimeter. The pitch of the blade(s) and/or blade section(s) are then adjusted to achieve a desired amount of lift or to create a stall-configuration as can be useful for conditions in which an excessive fluid velocity is detected.
    Type: Grant
    Filed: July 14, 2014
    Date of Patent: May 21, 2019
    Inventor: Demos T. Kyrazis
  • Patent number: 10295671
    Abstract: An array lidar system on a platform and a method of operating an array lidar system on a platform including a plurality of illuminators in an array transmitting through a lens includes establishing an initial arrangement of the plurality of illuminators among each other and an initial arrangement of the plurality of illuminators relative to the lens to define an initial field of view of the array lidar system. The method also includes controllably changing the initial field of view to a second field of view.
    Type: Grant
    Filed: May 4, 2016
    Date of Patent: May 21, 2019
    Inventors: Ran Y. Gazit, Ariel Lipson, Kobi J. Scheim
  • Patent number: 10288911
    Abstract: A device for emission of polarized light and its detection including a light emitter configured to generate an outgoing light beam directed along an optical emission axis, a light receiver configured to detect an incoming light beam directed along an optical detection axis, and a polarization unit positioned in the optical emission axis and optical detection axis and configured to polarize the outgoing light beam and the incoming light beam.
    Type: Grant
    Filed: October 12, 2015
    Date of Patent: May 14, 2019
    Assignee: OPTOSYS SA
    Inventor: Charles Rhême
  • Patent number: 10254388
    Abstract: To detect an atmospheric condition at the current location of a lidar system, a receiver in the lidar system detects a return light pulse scattered by a target and analyzes the characteristics of the return light pulse. The characteristics of the return light pulse include a rise time, a fall time, a duration, a peak power, an amount of energy, etc. When the rise time, fall time, and/or duration exceed respective thresholds, the lidar system detects the atmospheric condition such as fog, sleet, snow, rain, dust, smog, exhaust, or insects. In response to detecting the atmospheric condition, the lidar system adjusts the characteristics of subsequent pulses to compensate for attenuation or distortion of return light pulses due to the atmospheric condition. For example, the lidar system adjusts the peak power, pulse energy, pulse duration, inter-pulse-train spacing, number of pulses, or any other suitable characteristic.
    Type: Grant
    Filed: March 1, 2018
    Date of Patent: April 9, 2019
    Assignee: Luminar Technologies, Inc.
    Inventors: Joseph G. LaChapelle, Matthew D. Weed, Scott R. Campbell, Jason M. Eichenholz, Austin K. Russell, Lane A. Martin
  • Patent number: 10240912
    Abstract: An apparatus for determining a propagation velocity for a surface wave comprises a coherent light source (105) for generating at least a first and a second light spot on a surface (103). A camera (111) captures at least one out-of-focus image of at least a part of the surface (103) comprising the light spots. The out-of-focus image comprises light spot image objects for the light spots where the light spot image objects have speckle patterns. An analyzer (113) determines the propagation velocity in response to a time difference between speckle pattern changes in the two speckle patterns. The camera may specifically use a rolling shutter allowing the determination of the propagation velocity to be based on a spatial analysis of the speckle patterns. The approach may in particular allow an efficient remote measuring of pulse wave velocities e.g. in animal tissue and in particular, in human tissue.
    Type: Grant
    Filed: February 11, 2013
    Date of Patent: March 26, 2019
    Inventors: Remco Theodorus Johannes Muijs, Chris Damkat, Frederik Jan De Bruijn
  • Patent number: 10175346
    Abstract: A wind velocity searching unit 30 is configured so as to, when a spectrum signal calculated by a spectrum calculating unit 22 is one in a range bin having a signal strength less than a first threshold Th1, determine a search center IF of the search scope for a Doppler frequency corresponding to a wind velocity in the range bin by using a wind velocity model selected by a wind velocity model selecting unit 29, and search for the wind velocity in the range bin from the spectrum signal within the search scope whose search center IF is determined thereby. As a result, the probability that the peak of noise is detected erroneously as the peak of the spectrum signal is reduced.
    Type: Grant
    Filed: May 12, 2015
    Date of Patent: January 8, 2019
    Assignee: Mitsubishi Electric Corporation
    Inventors: Nobuki Kotake, Shumpei Kameyama, Yasuhisa Tamagawa
  • Patent number: 10168267
    Abstract: A rotational speed detection device is provided that can detect the rotational speed of a rotating object with high precision by readily controlling a relatively inexpensive and compact optical device, and has a lower cost and a smaller size with maintained or improved detection precision of the rotational speed of the rotating object. The rotational speed detection device includes a light emitting unit (5), a light receiving unit (6), a received light data obtaining unit (13), and a rotational speed calculation unit (15) that calculates the rotational speed of a rotating object (3). The rotating object (3) has an irregular uneven portion (3A) on a rotating surface thereof. The received light data obtaining unit (13) obtains time-series data of received light data of light reflected by the uneven portion (3A). The rotational speed calculation unit (15) calculates the rotational speed of the rotating object (3) from the periodicity of the time-series data.
    Type: Grant
    Filed: July 1, 2014
    Date of Patent: January 1, 2019
    Inventors: Masanori Yasuda, Keiji Sakai
  • Patent number: 10122466
    Abstract: An exemplary technique of optical signal transmission in which modulated optical signals are generated using photonic heterodyne beating and operating a digital to analog converter at baseband includes receiving information bits, modulating the information bits to generate a precoded vector signal at baseband, generating, using photonic heterodyne beating, from the precoded vector signal at baseband, a precoded vector signal at an upconverted frequency, and transmitting the precoded vector signal at the upconverted frequency on the optical communication network.
    Type: Grant
    Filed: October 28, 2016
    Date of Patent: November 6, 2018
    Assignee: ZTE Corporation
    Inventors: Jianjun Yu, Xinying Li
  • Patent number: 10107680
    Abstract: A quantum signal detection system includes a signal source configured to emit a transmit signal towards a target, and a photon adder that is configured to add at least one photon to a return signal that reflects from the target to form a combined signal. The combined signal increases a signal to noise ratio of the return signal.
    Type: Grant
    Filed: January 13, 2016
    Date of Patent: October 23, 2018
    Assignee: The Boeing Company
    Inventors: Barbara A. Capron, Benjamin E. C. Koltenbah, Claudio Parazzoli
  • Patent number: 10094874
    Abstract: A visualization method for screening electronic devices is provided. In accordance with the disclosed method, a probe is applied to a grid of multiple points on the circuit, and an output produced by the circuit in response to the stimulus waveform is monitored for each of multiple grid points where the probe is applied. A power spectrum analysis (PSA) produces a power spectrum amplitude, in each of one or more frequency bins, on the monitored output for each of the multiple grid points. The PSA provides a respective pixel value for each of the multiple grid points. An image is displayed, in which image portions representing the multiple grid points are displayed with the respective pixel values.
    Type: Grant
    Filed: July 13, 2016
    Date of Patent: October 9, 2018
    Assignee: National Technology & Engineering Solutions of Sandia, LLC
    Inventors: Paiboon Tangyunyong, Edward I. Cole, Jr., Guillermo M. Loubriel, Joshua Beutler
  • Patent number: 10073168
    Abstract: The invention measures the frequency of a heterodyne laser radar (LADAR) system signal in the input cell of a focal plane array (FPA). Embodiments amplify the return signal, and drive it into a counter for a fixed period of time. The frequency is the number of counts divided by the count time. An example design amplifier amplifies the return of a single photon response of an avalanche photodiode with a gain of 100 into a digital signal level at a 200 MHz rate with only 84 ?W, demonstrating the feasibility of the approach.
    Type: Grant
    Filed: July 30, 2015
    Date of Patent: September 11, 2018
    Assignee: BAE Systems Information and Electronic Systems Integration Inc.
    Inventors: Allen W Hairston, Gary M Madison
  • Patent number: 10030966
    Abstract: A length measuring apparatus configured to perform length measurement for an object moving in a measurement region includes a detector configured to detect light modulated by the object with a Doppler effect, and a processor configured to obtain a measurement value of a velocity of the object based on a signal from the detector, and obtain a length for the object based on the measurement value. The processor is configured to specify a point in time corresponding to the object based on an amplitude of the signal, obtain the measurement value based on the signal with respect to a time duration defined by the point in time, and obtain the length based on the measurement value obtained with respect to the time duration.
    Type: Grant
    Filed: June 29, 2016
    Date of Patent: July 24, 2018
    Inventors: Yukie Kuroki, Takayuki Uozumi, Hiroshi Koike
  • Patent number: 10018647
    Abstract: The present disclosure relates to a velocity interferometer. The interferometer described herein, comprises of two optical cells, one partially containing a liquid. The light entering the interferometer is amplitude split and made to propagate through the two cells in such a way that the apparent path lengths of the beams are equal, thereby fulfilling the condition necessary for obtaining single wide fringe in the interference pattern of the two beams. However, due to difference in the physical path traversed by the two beams, a finite delay time exists between them. The two beams, after reflection from end-mirrors or cube corner prisms in the two cells are recombined to form interference fringe patterns on active areas of multiple detectors. Doppler shifted light resulting from reflection of light from a moving projectile generate fringe shifts on the detector planes thereby producing voltage signals proportional to instantaneous velocity of fast moving projectile.
    Type: Grant
    Filed: May 18, 2015
    Date of Patent: July 10, 2018
    Assignee: Defence Research Development Organisation
    Inventors: Devinder Pal Ghai, Het Ram Swami, Anil Kumar Maini
  • Patent number: 9952154
    Abstract: An atomic interferometer and methods for measuring phase shifts in interference fringes using the same. The atomic interferometer has a laser beam traversing an ensemble of atoms along a first path and an optical components train with at least one alignment-insensitive beam routing element configured to reflect the laser beam along a second path that is anti-parallel with respect to the first laser beam path. Any excursion from parallelism of the second beam path with respect to the first is rigorously independent of variation of the first laser beam path in yaw parallel to an underlying plane.
    Type: Grant
    Filed: January 10, 2017
    Date of Patent: April 24, 2018
    Assignee: The Charles Stark Draper Laboratory, Inc.
    Inventors: Matthew A. Sinclair, Adam Kelsey, Richard E. Stoner
  • Patent number: 9829373
    Abstract: A laser vibrometer for measuring the vibratory characteristics of an object and more specifically, a moving object, has an improved signal to noise ratio due to multiple channels. A laser is split into a plurality of channels and then for each channel split again into a reference beam and a probe beam. The probe beam is directed at the object and the back scattered reflections are collected and compared to the reference beam to determine the vibratory characteristics of the object. The received signals from the multiple channels are different, sequential and non-overlapping.
    Type: Grant
    Filed: September 21, 2015
    Date of Patent: November 28, 2017
    Assignee: The United States of America as Represented by the Secretary of the Army
    Inventors: Venkataraman Swaminathan, Sudhir B. Trivedi, ChenChia Wang, Feng Jin
  • Patent number: 9817121
    Abstract: A radar apparatus which can simply determine the sign of velocity of an object is provided. Laser light reflected by the object undergoes quadrature optical heterodyne detection performed by mixers, optical detectors, and a ?/2 phase shifter, whereby I and Q component signals are output. A frequency analyzer performs FFT on a complex signal composed of the I component signal (real part) and the Q component signal (imaginary part) to thereby obtain its frequency spectrum. Since the frequency spectrum is calculated without being folded back even in a region where the frequency is negative, the sign of the Doppler frequency fd can be determined. When the Doppler frequency fd is positive, the sign of the velocity of the object is a direction toward the radar apparatus. When the Doppler frequency fd is negative, the sign of the velocity of the object is a direction away from the radar apparatus.
    Type: Grant
    Filed: December 23, 2014
    Date of Patent: November 14, 2017
    Inventors: Daisuke Inoue, Tatsuya Yamashita, Tadashi Ichikawa, Satoru Kato, Kazuo Hasegawa
  • Patent number: 9804265
    Abstract: An optimal position analysis unit 24 specifies an optimal installation position for a photodetector 6 by using spectra which by a spectrum and wind speed computing unit 23 calculated by analyzing output data of a photodetector 6 installed at different installation positions, controls a position adjustment made by an optical unit adjustment driving unit 7, and optimizes the installation position of the photodetector 6.
    Type: Grant
    Filed: March 4, 2013
    Date of Patent: October 31, 2017
    Assignee: Mitsubushi Electric Corporation
    Inventors: Nobuki Kotake, Masaharu Imaki, Shumpei Kameyama
  • Patent number: 9759736
    Abstract: This device for determining wind speed comprises at least two laser sources emitting beams in different directions that are coplanar and such that each emission direction corresponds to a perpendicular emission direction. Each laser source is associated with focusing optics for focusing the emitted beam, a laser diode for receiving a reflected beam obtained after reflection by a particle present in the air of the corresponding emitted beam, a photodiode for transmitting an interference signal occurring between the emitted beam and the reflected beam, a processor for processing the obtained interference signals, and an optical cavity into which the reflected beam is reinjected in order to obtain an interference with the emitted beam.
    Type: Grant
    Filed: April 15, 2013
    Date of Patent: September 12, 2017
    Assignees: EPSILINE, Institut National Polytechnique de Toulouse
    Inventors: Otmane Zamama, Raphaël Teysseyre, Julien Perchoux
  • Patent number: 9739876
    Abstract: Methods and apparatus are disclosed herein to determine relative positioning between moving platforms. An example method includes sending a first signal via a first moving platform to be received by a second moving platform. The example method includes receiving, at the first platform, a second signal sent by the second moving platform and aligning the first signal and the second signal. The example method includes determining, at the first moving platform, a first duration of time between the sending of a first pulse and the receiving of a second pulse. The example method includes determining, at the second moving platform, a second duration of time between the sending of the second pulse and the receiving of the first pulse. The example method includes determining a distance of the first moving platform relative to the second moving platform based on the first and second durations of time.
    Type: Grant
    Filed: April 13, 2015
    Date of Patent: August 22, 2017
    Assignee: The Boeing Company
    Inventors: Glenn Scott Bushnell, David C. Soreide
  • Patent number: 9721161
    Abstract: Representative implementations of devices and techniques provide adjustable parameters for imaging devices and systems. Dynamic adjustments to one or more parameters of an imaging component may be performed based on changes to the relative velocity of the imaging component or to the proximity of an object to the imaging component.
    Type: Grant
    Filed: August 14, 2013
    Date of Patent: August 1, 2017
    Assignee: Infineon Technologies AG
    Inventors: Markus Dielacher, Josef Prainsack, Martin Flatscher, Michael Mark, Robert Lobnik
  • Patent number: 9714969
    Abstract: A method and system for spectroscopic measurement of a characteristic of a biological tissue is provided. The method includes the steps of: (1) using at least one light source to emit light that penetrates the biological tissue; (2) using at least one light detector to detect light emitted by the at least one light source and passed through the biological tissue, and to convert the detected light into a detection signal, the detection signal including an unwanted noise component; and (3) using a processor to process the detection signal and to determine an adjusted peak-to-peak amplitude value that is representative of an amplitude of the detection signal adjusted for the unwanted noise component.
    Type: Grant
    Filed: September 30, 2013
    Date of Patent: July 25, 2017
    Assignee: CAS Medical Systems, Inc.
    Inventor: William Kosturko
  • Patent number: 9709594
    Abstract: A laser Doppler velocimeter uses self-mixing amplification of backreflections from scatterers below the surface of a flow. A time domain signal is divided into segments that are roughly equal to a transit time of particles through a focus of a laser beam. The segments are connected to a frequency domain through the use of an FFT algorithm to produce frequency domain data segments. Signal-to-noise ratio is enhanced through signal processing techniques using the segments to produce a final enhanced signal spectrum.
    Type: Grant
    Filed: April 10, 2014
    Date of Patent: July 18, 2017
    Assignee: Teledyne Technologies Incorporated
    Inventors: William R. Christian, Ray C. Delcher, Tong Chen, Mohsen Khoshnevisan, Phillip B. Liescheski, Michael A. Metcalf
  • Patent number: 9712250
    Abstract: A system for generating a frequency modulated linear laser waveform includes a single frequency laser generator to produce a laser output signal. An electro-optical modulator modulates the frequency of the laser output signal to define a linear triangular waveform. An optical circulator passes the linear triangular waveform to a band-pass optical filter to filter out harmonic frequencies created in the waveform during modulation of the laser output signal, to define a pure filtered modulated waveform having a very narrow bandwidth. The optical circulator receives the pure filtered modulated laser waveform and transmits the modulated laser waveform to a target.
    Type: Grant
    Filed: November 21, 2014
    Date of Patent: July 18, 2017
    Inventors: Diego F. Pierrottet, Larry B. Petway, Farzin Amzajerdian, Bruce W. Barnes, George E. Lockard, Glenn D. Hines
  • Patent number: 9705598
    Abstract: Methods of reducing optical beat interference in a fiber optic network are provided. The optical fiber network may have a plurality of optical network units that communicate with a shared receiver. The optical signals that are transmitted from the optical network units to the receiver may have polarization states that are selected to reduce optical beat interference at the receiver.
    Type: Grant
    Filed: April 3, 2015
    Date of Patent: July 11, 2017
    Assignee: CommScope, Inc. of North Carolina
    Inventors: J. Roberto Mazariegos, Mark O. Vogel, Mark E. Alrutz
  • Patent number: 9696458
    Abstract: According to the present invention, a method and a device for determining a physical quantity at a plurality of locations are provided. The method according to the invention comprises approaching the plurality of locations in a first predetermined direction, wherein at each location of the plurality of locations a first measured value of the physical quantity is measured, approaching the plurality of locations in a second predetermined direction substantially opposite to the first predetermined direction, wherein at each location of the plurality of locations a second measured value of the physical quantity is measured, and establishing a determination value for the physical quantity at a respective location of the plurality of locations based on the first and second measured values of the physical quantity which have been measured at the respective location.
    Type: Grant
    Filed: July 30, 2015
    Date of Patent: July 4, 2017
    Inventor: Martin Johannes Fengler
  • Patent number: 9684076
    Abstract: Methods, systems, and apparatuses are provided for measuring and mapping ranges, reflectivities, and/or velocities of multiple locations on an object by illuminating the locations with uniquely frequency-encoded sensing beams, which may be generated using one or more acousto-optic devices. A detector is used to sense the interference of the sensing beams reflected from the object and one or more reference beams, which may be co-propagating with the sensing beams to/from the object and/or may be provided via a separate reference path. A processor is used to estimate lateral coordinates, ranges, reflectivities, and/or velocities of the illuminated locations based on the frequencies, phases, amplitudes, and Doppler shifts, respectively, of the corresponding spectral components of the temporal beat signal produced by the detector in response to the interference of the sensing and reference beams.
    Type: Grant
    Filed: March 14, 2014
    Date of Patent: June 20, 2017
    Inventor: Daniel Feldkhun
  • Patent number: 9678923
    Abstract: Particles are dispensed under controlled conditions to achieve an accurate number of particles by passing a suspension of the particles through a particle detecting device, obtaining a cumulative particle count, comparing the cumulative particle count with a target value, and shutting off the suspension flow once the particle count reaches the target value, all performed by automated means.
    Type: Grant
    Filed: April 11, 2013
    Date of Patent: June 13, 2017
    Assignee: Bio-Rad Laboratories, Inc.
    Inventors: Kun Guo, Paul J Patt
  • Patent number: 9677870
    Abstract: A distance measuring method for measuring surfaces uses a laser source having a frequency that can be modulated to tune a wavelength of a laser beam in a wavelength range. The laser beam is generated with a coherence length to provide a measuring beam and is emitted at the surface, located within a specified distance range, as a measuring beam. The measuring beam is back-scattered by the surface and is received again and used to interferometrically measure the distance from a reference point to the surface. The specified distance range lies at least partly outside of the coherence length. One portion of the laser beam is temporally delayed with respect to another portion, such that the one optical path difference caused by the delay matches the optical path difference that corresponds to a distance in the specified distance range plus or minus the coherence length of the laser.
    Type: Grant
    Filed: June 25, 2012
    Date of Patent: June 13, 2017
    Inventor: Thomas Jensen
  • Patent number: 9669161
    Abstract: A system for pairing a controller and an infusion pump is disclosed. The system includes an infusion pump, a controller device and a user interface residing on both the infusion pump and the controller. The user interface includes a pairing mode for enabling wireless communication between the infusion pump and the controller device, wherein the user interface requires both the infusion pump and the controller to be in the pairing mode simultaneously. Also, a method of changing a power source in an infusion pump is disclosed. The method includes placing the infusion pump in idle mode wherein the infusion pump stops delivery. Removing the first power source from the infusion pump. Replacing the first power source with a second power source in the infusion pump, and maintaining the insulin on board during the changing of the first power source with the second power source.
    Type: Grant
    Filed: September 10, 2015
    Date of Patent: June 6, 2017
    Assignee: DEKA Products Limited Partnership
    Inventors: Robert J. Bryant, Jr., Geoffrey P. Spencer, Marc A. Mandro, Patricia M. Armstrong
  • Patent number: 9658113
    Abstract: An optical device (10) for determining a physical parameter includes: a laser diode (11) for emitting a beam toward a target; an element for detecting (13) an interferometric signal SM(t) which includes the information on the physical parameter to be determined, and which is generated by an interference between the emitted beam and a light beam reflected by the target; element for converting (15) the signal SM(t) obtained by the detection element (13) into a measurement of the physical parameter, the conversion element (15) including: first element (17) for suppressing a continuous component Off(t) of the interferometric signal SM(t); second element (18) for determining interferometric peaks in the interferometric signal SM(t) obtained from the signal obtained at the output of the first element (17). An associated method, particularly suitable for speckle interferometric signals is also described.
    Type: Grant
    Filed: July 4, 2014
    Date of Patent: May 23, 2017
    Inventors: Thierry Bosch, Francis Bony, Antonio Luna Arriaga
  • Patent number: 9639725
    Abstract: A tracking associate system that comprises a rotatable platform; an optically retroreflective label reader attached to the platform; a control unit attached to the rotatable platform; a scene recording camera; and a data network configured to process data produced by the label reader and/or the camera. Another tracking system comprises one, or more, label tracking pairs that each have a recording camera associated with a light source emitter; a platform configured to allow the label tracking pair to track a plurality of optically retroreflective labels that are affixed to objects; and a data network in communication with the label tracking pair that is configured to process data received from the label tracking pair.
    Type: Grant
    Filed: December 16, 2015
    Date of Patent: May 2, 2017
    Assignee: General Electric Company
    Inventors: Danijel Maricic, Michael James Hartman, John Erik Hershey
  • Patent number: 9632000
    Abstract: An embodiment of a tracker system for determining the distance of a moving object from a predefined reference point is disclosed. The system uses a phase-based signal extraction technique for determining the traversal time of the object through a predefined angular region. The first embodiment of the system includes a weather-resistant enclosure (12), two photodiodes (21) with narrow fields of view, four light-emitting diodes pulsed at high frequencies (20), collimating optics (15) for use with the light-emitting diodes, focusing optics (14) for use with the photodiodes, and an analog circuit for signal extraction (FIG. 7). FIG. 2 shows each component in the first embodiment. Phase-based signal processing identifies time intervals over which the object is within the angular region, from which the distance to the object is calculated (FIG. 1). Alternative embodiments are also discussed.
    Type: Grant
    Filed: January 27, 2015
    Date of Patent: April 25, 2017
    Assignee: RMCI, Inc.
    Inventors: Andrew Wallace Marsh, Bryant Paul Finney, Stephen Cary Potts, Benjamin Paul Leedy
  • Patent number: 9618530
    Abstract: There is provided a coherence length measurement device (10) that calculates a coherence length Lc based on a spectrum v calculated by an FFT device (9) and performs, in case where the coherence length Lc is shorter than an FFT gate width Gw, a setting change to shorten the FFT gate width Gw and a pulse width Pw, and the FFT device (9) performs frequency analysis on a received signal outputted from an A/D converter (8) by a unit of an FFT gate following the setting change to calculate the spectrum v of the received signal.
    Type: Grant
    Filed: April 5, 2013
    Date of Patent: April 11, 2017
    Assignee: Mitsubishi Electric Corporation
    Inventors: Masaharu Imaki, Nobuki Kotake, Shumpei Kameyama
  • Patent number: 9618321
    Abstract: An interference measuring device comprises: a light source; a beam splitter that causes the light to diverge into a reference optical path and a measurement optical path and that outputs a combined wave in which reflection light passed the reference optical path and reflection light passed the measurement optical path are combined; a reference light diverging part that causes the light diverged into the reference optical path, to further diverge into a plurality of optical paths and that causes reflection light beams respectively passed the optical paths to be input into the beam splitter; and a plurality of reference mirrors that are respectively arranged in the optical paths such that optical path lengths of the optical paths are different from each other, and that reflect reference light. An interference image is imaged by varying the optical path length of either the reference optical path or the measurement optical path.
    Type: Grant
    Filed: April 6, 2015
    Date of Patent: April 11, 2017
    Inventors: Ken Motohashi, Atsushi Usami
  • Patent number: 9612144
    Abstract: A method and arrangement are disclosed for measuring a flow rate of optically non-homogeneous material in a process pipe. The non-homogeneous material can be illuminated through a window. Images are taken with a camera, through a window, of illuminated non-homogeneous material. Correlation between temporally successive images determines travel performed by the non-homogeneous material in the process pipe between capture of temporally successive images. Velocity of the non-homogeneous material is determined by the time difference between the successive images and the travel.
    Type: Grant
    Filed: September 5, 2012
    Date of Patent: April 4, 2017
    Assignee: JANESKO OY
    Inventor: Juha Jääskeläinen
  • Patent number: 9506741
    Abstract: An optical coherence tomography (OCT) system having magnitude and direction of motion detection has a light source, and a scanning system arranged in an optical path of the light source. The scanning system is configured to scan an illumination beam of light in a spatial pattern around each of a plurality of points of interest of an object under observation for a corresponding plurality of instants of time in which each of the plurality of points of interest are displaced from each other due to motion of at least one of the OCT system or the object under observation. The OCT system also includes an OCT detection system configured and arranged to receive at least a portion of the illumination beam of light after being at least one of reflected or scattered from said the under observation, and a signal processor configured to communicate with the OCT detection system to receive detection signals therefrom.
    Type: Grant
    Filed: June 9, 2014
    Date of Patent: November 29, 2016
    Assignee: The Johns Hopkins University
    Inventors: Xuan Liu, Jin U. Kang