Of Frequency Difference Patents (Class 356/5.09)
  • Patent number: 10838061
    Abstract: A system and method for enhanced velocity resolution and signal to noise ratio in optical phase-encoded range detection includes receiving an electrical signal generated by mixing a first optical signal and a second optical signal, wherein the first optical signal is generated by modulating an optical signal, wherein and the second optical signal is received in response to transmitting the first optical signal toward an object, and determining a Doppler frequency shift of the second optical signal, and generating a corrected electrical signal by adjusting the electrical signal based on the Doppler frequency shift, and determining a range to the object based on a cross correlation of the corrected electrical signal with a radio frequency (RF) signal that is associated with the first optical signal.
    Type: Grant
    Filed: December 31, 2019
    Date of Patent: November 17, 2020
    Assignee: BLACKMORE SENSORS & ANALYTICS, LLC.
    Inventors: Stephen C. Crouch, Zeb William Barber, Emil A. Kadlec, Krishna Rupavatharam
  • Patent number: 10782408
    Abstract: A calibration method includes: (S1) generating an external light path via a laser automatic power control circuit through a high frequency modulation signal, sending the external light path to a measured target, reflecting the external light path back through the measured target and receiving the reflected external light path by a photoelectric receiving circuit; (S2) generating an internal light path via the laser automatic power control circuit through the high frequency modulation signal, directly sending the internal light path to the photoelectric receiving circuit, and receiving the internal light path through the photoelectric receiving circuit; and (S3) performing phase comparison between two paths of light waves respectively corresponding to the external light path and the internal light path received firstly and secondly by the photoelectric receiving circuit, and a reference phase signal through the photoelectric receiving circuit, calculating a distance phase, and outputting a signal whose base is
    Type: Grant
    Filed: August 25, 2016
    Date of Patent: September 22, 2020
    Assignee: HONGKONG SNDWAY INSTRUMENT COMPANY LIMITED
    Inventor: Gang He
  • Patent number: 10775503
    Abstract: A measuring method and a distance measuring device for determining an absolute distance to a target moving at a radial movement velocity with respect to the distance measuring device, wherein a modulated transmission radiation is emitted to the target and a measurement signal is detected, such that information regarding the absolute distance to the target is attached to the measurement signal by means of at least one reference point of a frequency-dependent signal profile of the measurement signal, on the basis of a modulation phase of the reception radiation with respect to a set fundamental modulation, wherein for a set fundamental modulation frequency the deviation of said frequency value with respect to a reference point, in particular a minimum point, of the signal profile of the measurement signal is derived, namely the frequency offset and the offset direction with respect to the reference point.
    Type: Grant
    Filed: April 11, 2018
    Date of Patent: September 15, 2020
    Assignee: LEICA GEOSYSTEMS AG
    Inventors: Konrad Wildi, Thomas Lüthi, Hans-Ulrich Minder
  • Patent number: 10775143
    Abstract: The system and method for accurately determining range-to-go for a time-delayed command detonation of a projectile. Using dual laser and/or radio frequency detectors on the tail and on the nose of a spinning projectile to determine the range-to-go, time-to-go, and/or lateral offset from the projectile to the target. A time to detonation clock is used to determine when a projectile transitions from an exterior to an interior of a structure such that the projectile can more accurately detonate within a fixed structure.
    Type: Grant
    Filed: September 6, 2018
    Date of Patent: September 15, 2020
    Assignee: BAE Systems Information and Electronic Systems Integration Inc.
    Inventors: Michael J. Choiniere, Bruce Winker
  • Patent number: 10642075
    Abstract: A phase controller for rapid, accurate, stable phase shifting of a continuous wave (cw) laser output combines and adjusts reference paths from before and after an EOPM to obtain maximum constructive interference when the EOPM control voltage is zero. A control voltage V for maximum destructive interference is then determined and regulated to produce and maintain a 180 degree phase shift. The output phase can then be shifted by switching the control voltage to the output of a voltage shifter that shifts V by a specified percentage. The phase shifter can divide the control voltage in half to provide a 90 degree phase shift. The cw laser can function as a seed to a pulsed laser, thereby controlling the pulse phases. Quadrature phase laser pulse pairs can be used for quadrature LiDAR detection. Embodiments include a plurality of voltage shifters for 4-phase quadrature shifting and/or shifting between arbitrary phase values.
    Type: Grant
    Filed: September 27, 2017
    Date of Patent: May 5, 2020
    Assignee: BAE Systems Information and Electronic Systems Integration Inc.
    Inventors: Aaron W Bennett, Daniel J Creeden, Brant M Kaylor, Scott D Setzler
  • Patent number: 10578740
    Abstract: This disclosure presents a non-contact, frequency modulated continuous wave (FMCW) coherent optical distance measuring system and method for determining a measured distance over a wide distance range and simultaneously with fine range resolution. The approach and apparatus presented within eliminates the need for expensive, high frequency post-detection electronics to perform the necessary signal processing to accurately determine distance.
    Type: Grant
    Filed: August 23, 2017
    Date of Patent: March 3, 2020
    Assignee: Mezmeriz Inc.
    Inventors: Shahyaan Desai, Scott G. Adams, Clifford A. Lardin
  • Patent number: 10534084
    Abstract: An apparatus is provided for using a square wave digital chirp signal for optical chirp range detection. A laser source emits an optical signal and a RF waveform generator generates an input digital chirp signal based on the square wave digital chirp signal. A frequency of the optical signal is modulated based on the input digital chirp signal. A splitter divides the optical signal into a transmit optical signal and a reference optical signal. A detector combines the reference optical signal and a return optical signal from an object. The detector generates an electrical output signal based on the combined reference optical signal and the return optical signal. A processor determines a range to the object based on a characteristic of a Fourier transform the electrical output signal. A method is also provided for using the square wave digital chirp signal for optical chirp range detection.
    Type: Grant
    Filed: July 27, 2017
    Date of Patent: January 14, 2020
    Assignee: BLACKMORE SENSORS & ANALYTICS, LLC
    Inventors: Stephen C. Crouch, James Curry, Trenton Berg, Richard Funk, Kyle Oliver, Daniel Ferguson
  • Patent number: 10527727
    Abstract: Described herein is a system, a method and a processor-readable medium for spatial profiling.
    Type: Grant
    Filed: September 27, 2016
    Date of Patent: January 7, 2020
    Assignee: Baraja Pty Ltd.
    Inventors: Federico Collarte Bondy, Cibby Pulikkaseril
  • Patent number: 10345446
    Abstract: The present disclosure provides a mobile machine including a laser diode based lighting system having an integrated package holding at least a gallium and nitrogen containing laser diode and a wavelength conversion member. The gallium and nitrogen containing laser diode is configured to emit a first laser beam with a first peak wavelength. The wavelength conversion member is configured to receive at least partially the first laser beam with the first peak wavelength to excite an emission with a second peak wavelength that is longer than the first peak wavelength and to generate the white light mixed with the second peak wavelength and the first peak wavelength. The mobile machine further includes a light detection and ranging (LIDAR) system configured to generate a second laser beam and manipulate the second laser beam to sense a spatial map of target objects in a remote distance.
    Type: Grant
    Filed: June 18, 2018
    Date of Patent: July 9, 2019
    Assignee: Soraa Laser Diode, Inc.
    Inventors: James W. Raring, Melvin McLaurin, Paul Rudy, Vlad Novotny
  • Patent number: 10338220
    Abstract: The present disclosure provides a mobile machine including a laser diode based lighting system having an integrated package holding at least a gallium and nitrogen containing laser diode and a wavelength conversion member. The gallium and nitrogen containing laser diode is configured to emit a first laser beam with a first peak wavelength. The wavelength conversion member is configured to receive at least partially the first laser beam with the first peak wavelength to excite an emission with a second peak wavelength that is longer than the first peak wavelength and to generate the white light mixed with the second peak wavelength and the first peak wavelength. The mobile machine further includes a light detection and ranging (LIDAR) system configured to generate a second laser beam and manipulate the second laser beam to sense a spatial map of target objects in a remote distance.
    Type: Grant
    Filed: June 7, 2018
    Date of Patent: July 2, 2019
    Assignee: Soraa Laser Diode, Inc.
    Inventors: James W. Raring, Melvin McLaurin, Paul Rudy, Vlad Novotny
  • Patent number: 10330780
    Abstract: Methods and systems for performing three dimensional LIDAR measurements with multiple illumination beams scanned over a three dimensional environment by one or more optical phase modulation devices are described herein. In one aspect, illumination light from each LIDAR measurement channel is emitted to the surrounding environment in a different direction by an optical phase modulation device. The optical phase modulation device also directs each amount of return measurement light onto a corresponding photodetector. The illumination pulse output of each LIDAR measurement channel is synchronized with commanded changes of state of each corresponding optical phase modulation device. In some embodiments, each optical phase modulation device is associated with a single LIDAR measurement channel. In some embodiments, multiple LIDAR measurement channels are associated with a single modulation device. In some embodiments, a one dimensional optical phase modulation device is employed.
    Type: Grant
    Filed: March 20, 2018
    Date of Patent: June 25, 2019
    Assignee: Velodyne Lidar, Inc.
    Inventors: David S. Hall, Mathew Noel Rekow
  • Patent number: 10317531
    Abstract: A module for measuring an object located in a position finding zone; the module being configured for generating a primary beam; the module having a scanning mirror structure; the scanning mirror structure being controllable to allow the primary beam to execute a scanning movement within the position finding zone; the module being configured to allow a secondary signal to be detected when the secondary signal is produced in response to the interaction of the primary beam with the object in a deflection position of the scanning mirror structure; the module being configured to generate position finding information as a function of the deflection position of the scanning mirror structure; the module featuring a semiconductor laser component; the semiconductor laser component being configured for producing the primary beam and for detecting the secondary signal.
    Type: Grant
    Filed: March 26, 2015
    Date of Patent: June 11, 2019
    Assignee: ROBERT BOSCH GMBH
    Inventors: Christoph Delfs, Frank Fischer, Reiner Schnitzer, Niklas Dittrich, Heiko Ridderbusch, Gael Pilard
  • Patent number: 10249249
    Abstract: A semiconductor device capable of current detection accurately is provided. The semiconductor device includes an error amplifier, a voltage controlled oscillator (VCO), a counter, a first circuit, and a terminal. The terminal is electrically connected to a non-inverting input terminal of the error amplifier. An inverting input terminal of the error amplifier is supplied with first voltage. An output terminal of the error amplifier is electrically connected to the VCO. An output terminal of the VCO is electrically connected to the counter. The first circuit is electrically connected to the output terminal of the VCO and the terminal. The circuit supplies current in accordance with the frequency of a signal output from the VCO.
    Type: Grant
    Filed: March 2, 2017
    Date of Patent: April 2, 2019
    Assignee: Semiconductor Energy Laboratory Co., Ltd.
    Inventor: Kei Takahashi
  • Patent number: 10215847
    Abstract: A method of performing ranging and detection with an array lidar system and the array lidar system include a first illuminator to transmit a first pseudorandom binary sequence of pulses, the first pseudorandom sequence of pulses resulting in first reflections, and a second illuminator to transmit a second pseudorandom sequence of pulses, the second pseudorandom sequence of pulses being transmitted at least partly concurrently with transmission of the first pseudorandom sequence of pulses, the second pseudorandom sequence of pulses resulting in second reflections. A receiver receives the first reflections and the second reflections and associates the first reflections with the first illuminator based on a result of correlating the first reflections with the first pseudorandom sequence of pulses and a result of correlating the first reflections with the second pseudorandom sequence of pulses, the receiver includes an optical detector array and a processor.
    Type: Grant
    Filed: May 4, 2016
    Date of Patent: February 26, 2019
    Assignee: GM GLOBAL TECHNOLOGY OPERATIONS LLC
    Inventors: Kobi J. Scheim, Ariel Lipson, Ran Y. Gazit, Oded Bialer
  • Patent number: 10209351
    Abstract: A method for removing Doppler ambiguity in a ladar system. The time of each pulse of a sequence of transmitted pulses is offset from that of a uniform sequence of pulses. Each received pulse is represented by a complex number corresponding to its amplitude and phase, and each complex number of the resulting array of complex numbers is multiplied by a complex correction factor having a phase proportional to (i) the time offset of the corresponding pulse, and to (ii) a test frequency of an array of test frequencies, to form a second array of complex numbers. A Fourier transform of the second array is taken, and the value at the test frequency is copied into a corrected spectrum array. The process is repeated for each test frequency in the array of test frequencies, to generate a complete corrected spectrum array.
    Type: Grant
    Filed: June 14, 2016
    Date of Patent: February 19, 2019
    Assignee: RAYTHEON COMPANY
    Inventor: Maurice J. Halmos
  • Patent number: 10203401
    Abstract: Various implementations of the invention compensate for “phase wandering” in tunable laser sources. Phase wandering may negatively impact a performance of a lidar system that employ such laser sources, typically by reducing a coherence length/range of the lidar system, an effective bandwidth of the lidar system, a sensitivity of the lidar system, etc. Some implementations of the invention compensate for phase wandering near the laser source and before the output of the laser is directed toward a target. Some implementations of the invention compensate for phase wandering in the target signal (i.e., the output of the laser that is incident on and reflected back from the target). Some implementations of the invention compensate for phase wandering at the laser source and in the target signal.
    Type: Grant
    Filed: July 9, 2015
    Date of Patent: February 12, 2019
    Assignee: StereoVision Imaging, Inc.
    Inventors: Richard L. Sebastian, Kendall L. Belsley, Stephan Schulz
  • Patent number: 10129955
    Abstract: A light source identification system, the system comprising a light source imaging device and a processing device, the light source imaging device comprising a light sensor operable to image at least a portion of an environment in which the light source imaging device is present, wherein the environment comprises one or more light sources, and a transmitter operable to transmit image data, and the processing device comprising a processor that is operable, in a calibration mode, to identify light sources from received image data and locate them within the environment.
    Type: Grant
    Filed: November 29, 2016
    Date of Patent: November 13, 2018
    Assignee: SONY INTERACTIVE ENTERTAINMENT INC.
    Inventors: Phillip Rogers, Jesus Lucas Barcias
  • Patent number: 10018501
    Abstract: A measuring apparatus for contactlessly measuring vibration or displacement of a measurement target includes a light source configured to emit a continuous wave of light frequency-modulated to arrange a measurement site of the measurement target within a correlation peak, a divider configured to divide the continuous wave of light into first and second divided-waves of light, a light receiver configured to receive interfering light of the first divided-wave of light reflected by the measurement target and the second divided-wave of light, and a calculator configured to calculate the vibration or displacement of the measurement target using an electric signal output from the light receiver.
    Type: Grant
    Filed: March 2, 2017
    Date of Patent: July 10, 2018
    Assignee: Yokogawa Electric Corporation
    Inventor: Osamu Furukawa
  • Patent number: 9935666
    Abstract: A transceiver may include a reception (Rx) radio frequency (RF) part configured to process a received signal, a transmission (Tx) RF part configured to process a transmitted signal, and a phase lock loop (PLL) configured to provide a reception frequency to the reception RF part and provide a transmission frequency to the transmission RF part. The PLL may be controlled according to whether the reception RF part or the transmission RF part is on. In addition, a transceiver may include quenching waveform generator (QWGs) to control quenching waveforms of the RF parts corresponding to a plurality of antennas. The quenching waveforms may be generated respectively by VCOs operating at a same frequency. The QWGs may control the VCOs such that the quenching waveforms do not overlap.
    Type: Grant
    Filed: April 4, 2017
    Date of Patent: April 3, 2018
    Assignees: Samsung Electronics Co., Ltd., Sungkyunkwan University Foundation for Corporate Collaboration
    Inventors: Jaesup Lee, Hong Jin Kim, Hyung Gu Park, Kang Yoon Lee
  • Patent number: 9891318
    Abstract: Various embodiments are directed to a location detection system. The location detection system may utilize one or more light sources in a fixed and known position capable of emitting modulated light. The location detection system may utilize one or more light receivers in a fixed and known position operative to detect light emitted by the light sources that has been reflected back off an object. The location detection system may utilize a processor circuit that may be communicatively coupled with the light receiver and the light sources. The processor circuit may be operative to receive signals indicative of the detected reflected emitted light from the light receiver. The processor circuit may also be operative to process the signals to determine a location of the object that reflected the emitted light.
    Type: Grant
    Filed: November 30, 2011
    Date of Patent: February 13, 2018
    Assignee: INTEL CORPORATION
    Inventor: Richard D. Roberts
  • Patent number: 9784560
    Abstract: Length metrology apparatuses and methods are disclosed for measuring both specular and non-specular surfaces with high accuracy and precision, and with suppressed phase induced distance errors. In one embodiment, a system includes a laser source exhibiting a first and second laser outputs with optical frequencies that are modulated linearly over large frequency ranges. The system further includes calibration and signal processing portions configured to determine a calibrated distance to at least one sample.
    Type: Grant
    Filed: October 29, 2015
    Date of Patent: October 10, 2017
    Assignee: Bridger Photonics, Inc.
    Inventors: Michael Thorpe, Aaron Kreitinger, Randy Reibel
  • Patent number: 9759550
    Abstract: A projection exposure apparatus (10) for microlithography has a plurality of optical components (M1-M6) forming an exposure beam path, as well as a distance measurement system (30, 130, 230) configured to measure a distance between at least one of the optical components and a reference element (40, 140, 240). The distance measurement system comprises a frequency comb generator (32, 132, 232), which is configured to generate electromagnetic radiation (36, 236) having a comb-shaped frequency spectrum.
    Type: Grant
    Filed: January 16, 2015
    Date of Patent: September 12, 2017
    Assignee: Carl Zeiss SMT GmbH
    Inventors: Alexander Wolf, Markus Schwab, Toralf Gruner, Joachim Hartjes
  • Patent number: 9714822
    Abstract: A projection exposure apparatus (10) for microlithography has a plurality of optical components (M1-M6) forming an exposure beam path, as well as a distance measurement system (30, 130, 230) configured to measure a distance between at least one of the optical components and a reference element (40, 140, 240). The distance measurement system comprises a frequency comb generator (32, 132, 232), which is configured to generate electromagnetic radiation (36, 236) having a comb-shaped frequency spectrum.
    Type: Grant
    Filed: January 16, 2015
    Date of Patent: July 25, 2017
    Assignee: Carl Zeiss SMT GmbH
    Inventors: Alexander Wolf, Markus Schwab, Toralf Gruner, Joachim Hartjes
  • Patent number: 9692548
    Abstract: A blind equalization technique of high-order QAM signals is provided. A method implemented at a receiver-side in an optical communication network receives an optical signal and performs a two-step polarization tracking process on the received optical signal. Using another method, a polarization multiplexed optical transmission is received by a receiver and a polarization tracking process is performed by applying two different algorithms in parallel. One algorithm may be a decision directed least means square (DD-LMS) algorithm. Another algorithm may be a constant modulus algorithm (CMA).
    Type: Grant
    Filed: March 18, 2015
    Date of Patent: June 27, 2017
    Assignee: ZTE Corporation
    Inventors: Zhensheng Jia, Hung-Chang Chien, Jianjun Yu
  • Patent number: 9599468
    Abstract: Methods and systems for using spectrally separated light pulses to collect more LIDAR information are presented. In one example, a laser pulse may be directed to a point on an object and a corresponding return light signal may be received. The return light signal may be wavelength separated into a plurality of spectral pulse components. Each of the spectral pulse components may be propagated down a separate fiber optic delay line each having a different length to provide a plurality of time-separated spectral pulse components. The time-separated spectral pulse components may be combined to provide a recombined spectral pulse signal. The recombined spectral pulse signal can be provided to an intensity-related measuring/detection circuitry to generate corresponding object location information and object spectral information regarding the point on the object.
    Type: Grant
    Filed: October 9, 2014
    Date of Patent: March 21, 2017
    Assignee: LEICA GEOSYSTEMS AG
    Inventors: Gregory C. Walsh, Alan Aindow
  • Patent number: 9575182
    Abstract: A detection apparatus and method for FMCW LIDAR employ signals whose frequencies are modified so that low-cost and low-speed photodetector arrays, such as CCD or CMOS cameras, can be employed for range detection. The LIDAR is designed to measure the range z to a target and includes a single mode swept frequency laser (SFL), whose optical frequency is varied with time, as a result of which, a target beam which is reflected back by the target is shifted in frequency from a reference beam by an amount that is proportional to the relative range z to the target. The reflected target beam is combined with the reference beam and detected by the photodetector array. By first modulating at least one of the target and reference beams such that the difference between the frequencies of the reflected target beam and the reference beam is reduced to a level that is within the bandwidth of the photodetector array, the need for high-speed detector arrays for full-field imaging is obviated.
    Type: Grant
    Filed: December 30, 2014
    Date of Patent: February 21, 2017
    Assignees: California Institute of Technology, Telaris Inc.
    Inventors: Naresh Satyan, Arseny Vasilyev, George Rakuljic, Amnon Yariv
  • Patent number: 9551776
    Abstract: Methods and apparatus to determine a position using light sources are disclosed. An example method includes processing an output of a photodetector based on anticipated codes to identify multiple light sources from which the photodetector receives light at a first position, determining locations of the identified light sources; and determining a location of the first position based on the locations of the identified light sources.
    Type: Grant
    Filed: May 12, 2014
    Date of Patent: January 24, 2017
    Assignee: THE BOEING COMPANY
    Inventors: Richard Donovan Jones, Darin W. Brekke, Dan J. Clingman
  • Patent number: 9551619
    Abstract: A pulsed emitter of electromagnetic radiation having a frequency range of 0.1 to 10 THz is described. The pulsed emitter includes an electromagnetic radiation gain medium and a pulse inducing element. The electromagnetic radiation gain medium is for generating electromagnetic radiation having the frequency range of 0.1 to 10 THz. The pulse inducing element is configured to induce an electromagnetic radiation pulse in the gain medium.
    Type: Grant
    Filed: September 23, 2011
    Date of Patent: January 24, 2017
    Assignee: Rockwell Collins, Inc.
    Inventors: Robert G. Brown, James H. Stanley
  • Patent number: 9506750
    Abstract: Imaging range finding device and method are disclosed. The range finding device can include an array of emitters and photodetectors in optical communication with an imaging lens. During the range finding method, the emitters in the array can emit light that is directed by the lens toward a target object. The photodetectors in the array can detect light received from the object through the lens and onto the photodetectors. The lens, the array, or both can be movable to adjust the light emitted by the device. Characteristics of the emitted light and/or the received light can be used to find the object's range.
    Type: Grant
    Filed: December 7, 2012
    Date of Patent: November 29, 2016
    Assignee: Apple Inc.
    Inventor: Matthew Emanuel Last
  • Patent number: 9335415
    Abstract: A laser range finder including a laser configured to project a laser beam onto a target object thereby causing a target beam to be reflected from the target object, wherein the laser beam has a frequency, and wherein the frequency is modulated at a known rate, a first beam splitter positioned to split a reference beam from the laser beam, a second beam splitter positioned to receive the target beam and the reference beam, wherein the target beam and the reference beam are coherently combined, the coherently combined beams establishing a difference frequency, and a detector configured to measure the difference frequency.
    Type: Grant
    Filed: October 31, 2012
    Date of Patent: May 10, 2016
    Assignee: The Boeing Company
    Inventor: Douglas R. Jungwirth
  • Patent number: 9176229
    Abstract: A three-dimensional distance measuring method includes: projecting at least one beam set forming a projection plane onto a surface of an object, the beam set including multiple beams transmitted according to a predetermined first path function and linearly arranged to form detection points on the surface of the object; rendering the beams reflected by the surface of the object to pass through a focus of a focusing element to form a sense image on a photosensitive memory element; obtaining a corresponding second path function according to an image formation position of each beam on the photosensitive memory element and a position of the focus of the focusing element; and calculating an intersection position of each first path function and the corresponding second path function to obtain a spatial position of each detection point on the object.
    Type: Grant
    Filed: April 10, 2013
    Date of Patent: November 3, 2015
    Assignee: FLEX INSTRUMENT CO., LTD.
    Inventor: Win-Throng Chen
  • Patent number: 9157856
    Abstract: Devices, methods and systems based on integrated photonic crystal structures are disclosed. An integrated photonic crystal structure includes a photonic crystal structure and a defect member disposed adjacent the photonic crystal structure. The defect member includes a photoconductive material. The integrated photonic crystal structure is configured to receive an input light signal such that the input light signal is internally reflected within the photonic crystal structure and the defect member, such that the input light signal is absorbed by the photoconductive material in the defect member, and such that a property of the photoconductive material is changed to thereby output an output signal.
    Type: Grant
    Filed: September 10, 2013
    Date of Patent: October 13, 2015
    Inventors: Yunbo Guo, Harish Subbaraman, Ray T. Chen
  • Patent number: 9136668
    Abstract: A laser amplifier module having an enclosure includes an input window, a mirror optically coupled to the input window and disposed in a first plane, and a first amplifier head disposed along an optical amplification path adjacent a first end of the enclosure. The laser amplifier module also includes a second amplifier head disposed along the optical amplification path adjacent a second end of the enclosure and a cavity mirror disposed along the optical amplification path.
    Type: Grant
    Filed: October 28, 2011
    Date of Patent: September 15, 2015
    Assignee: Lawrence Livermore National Security, LLC
    Inventors: Andrew James Bayramian, Alvin Charles Erlandson, Kenneth Rene Manes, Mary Louis Spaeth, John Allyn Caird, Robert J. Deri
  • Patent number: 9081090
    Abstract: Various implementations of the invention compensate for “phase wandering” in tunable laser sources. Phase wandering may negatively impact a performance of a lidar system that employ such laser sources, typically by reducing a coherence length/range of the lidar system, an effective bandwidth of the lidar system, a sensitivity of the lidar system, etc. Some implementations of the invention compensate for phase wandering near the laser source and before the output of the laser is directed toward a target. Some implementations of the invention compensate for phase wandering in the target signal (i.e., the output of the laser that is incident on and reflected back from the target). Some implementations of the invention compensate for phase wandering at the laser source and in the target signal.
    Type: Grant
    Filed: March 15, 2013
    Date of Patent: July 14, 2015
    Assignee: Digital Signal Corporation
    Inventors: Richard L. Sebastian, Kendall L. Belsley, Stephan Schulz
  • Patent number: 9063387
    Abstract: Systems and methods are provided for applying directed energy to an object. The system includes a first transmitter comprising a light source configured to emit a first light beam at a first frequency towards a focal point and a second transmitter comprising a light source configured to emit a second light beam at a second frequency towards the focal point. The first and second light beams cause a third light beam to be generated that has a third frequency that is coincident with at least one resonant frequency of the object.
    Type: Grant
    Filed: September 13, 2012
    Date of Patent: June 23, 2015
    Assignee: The Boeing Company
    Inventors: Jeffrey H. Hunt, Nicholas Koumvakalis
  • Patent number: 9041918
    Abstract: A handheld distance measuring instrument includes a first emission device, a first reception device and a second reception device. The first emission device is configured to emit an optical measurement radiation onto a target object. The first reception device is configured to detect the radiation returning from the target object. The second reception device is configured in order to detect a reference radiation internal to the instrument. The reception devices respectively include a first detector unit, a second detector unit, a first time measurement unit, and a second time measurement unit. The first time measurement unit is configured to be connected selectively to the first detector unit and to the second detector unit. The second time measurement unit is configured to be connected selectively to the first detector unit and to the second detector unit.
    Type: Grant
    Filed: December 17, 2013
    Date of Patent: May 26, 2015
    Assignee: Robert Bosch GmbH
    Inventors: Andreas Eisele, Bernd Schmidtke, Reiner Schnitzer, Oliver Wolst
  • Patent number: 9007568
    Abstract: A distance detecting induction device includes a casing, a circuit board within the casing, and a pair of focusing lenses provided at respective openings in the casing. The distance detecting induction device further includes an emitting device including an infrared light emitting diode for emitting infrared light rays to the emitting lens and a receiving device including a distance detection induction module for inducing reflected light rays focused by the receiving lens. The distance detecting induction device further includes an emitting light ray guiding device arranged between the emitting lens and the emitting device. The guiding device includes a small circular hole provided at a position of the emitting device and a big circular hole provided at a position of the emitting lens.
    Type: Grant
    Filed: August 27, 2009
    Date of Patent: April 14, 2015
    Assignee: Shanghai Kohler Electronics, Ltd.
    Inventors: Qiaomei Tang, Guofeng Chen
  • Patent number: 8988662
    Abstract: In some embodiments, distances associated with a surface may be calculated using time-of-flight (ToF) of a plurality of pulses of light occurring at a predetermined frequency. Reflected light from a light emitter may be captured by two or more light sensors. At least one light sensor may be located in a sensor pod that is separate from the light emitter, which may be housed in an emitter pod with or without a light sensor. The sensor pod may be synchronized with the emitter pod to enable ToF of light distance calculations. The calculated distance may be used to determine movement of a surface and/or one or more pixels of a surface. In some instances, the calculated distance may be used to identify a profile of a surface, which may then be used associate the profile with an object, a command, or another association.
    Type: Grant
    Filed: October 1, 2012
    Date of Patent: March 24, 2015
    Assignee: Rawles LLC
    Inventors: Menashe Haskin, William Thomas Weatherford, Edward Dietz Crump
  • Patent number: 8988663
    Abstract: Using a hand-held range finding device to range an object in a field of view is difficult due to user-induced jitter. In particular, user-induced jitter introduces uncertainty as to which object in a field of view is actually ranged. Current approaches attempt to mitigate user-induced jitter by requiring a user to mount the hand-held range finding device onto a stabilizing device (e.g., a tripod). However, such approaches require the user to carry additional equipment. Embodiments of the present disclosure enable the user to visually confirm which object in a field of view is actually ranged during a range finding event by generating a composite image that includes a visual representation of a laser pulse emitted by the range finding device reflecting off an object in the field of view. Advantageously, disclosed embodiments provide true hand-held range finding capabilities without requiring the use of stabilization assistance techniques.
    Type: Grant
    Filed: January 22, 2013
    Date of Patent: March 24, 2015
    Assignee: Raytheon Company
    Inventors: Brent L. Sisney, Bryan K. Hawk, Robert P. Francis, James A. McIntosh
  • Patent number: 8976339
    Abstract: A system for determining the speed and position of objects comprises a beam source, a transmit reflection device, a beam receiver, a receive reflection device, and a controller. The beam source may generate a beam. The transmit reflection device may reflect the beam at the objects and may include a plurality of transmit faces with each transmit face oriented at a different angle and operable to reflect the beam at a different height. The beam receiver may detect the beam. The receive reflection device may include a plurality of receive faces with each receive face oriented at a different angle and operable to focus the beam reflected from objects at different heights onto the beam receiver. The controller may determine the position of the objects over time and calculate the speed of the objects based on a change in the position of the objects.
    Type: Grant
    Filed: January 13, 2014
    Date of Patent: March 10, 2015
    Assignee: Digital Ally, Inc.
    Inventors: Steven L. Phillips, Nihat Cem Oguz, Kenneth L. McCoy, Matthew R. Andrews
  • Patent number: 8976340
    Abstract: A system for landing or docking a mobile platform is enabled by a flash LADAR sensor having an adaptive controller with Automatic Gain Control (AGC). Range gating in the LADAR sensor penetrates through diffuse reflectors. The LADAR sensor adapted for landing/approach comprises a system controller, pulsed laser transmitter, transmit optics, receive optics, a focal plane array of detectors, a readout integrated circuit, camera support electronics and image processor, an image analysis and bias calculation processor, and a detector array bias control circuit. The system is capable of developing a complete 3-D scene from a single point of view.
    Type: Grant
    Filed: April 16, 2012
    Date of Patent: March 10, 2015
    Assignee: Advanced Scientific Concepts, Inc.
    Inventors: Patrick Gilliland, Bob Koseluk, Steve Penniman, Brad Short, Joe Spagnolia, Roger Stettner
  • Patent number: 8970827
    Abstract: A fast spatial light modulator based on a linear MEMS ribbon array enables a depth capture system to operate in structured light and time-of-flight modes. Time-of-flight depth information may be used to phase unwrap structured light depth information. Combined structured light and time-of-flight systems offer precise depth resolution over a wide range of distances.
    Type: Grant
    Filed: September 20, 2013
    Date of Patent: March 3, 2015
    Assignee: Alces Technology, Inc.
    Inventors: David M Bloom, Matthew A Leone
  • Patent number: 8964168
    Abstract: A detection system for detecting an object includes a transmitter including a light source configured to emit a first light beam having a first frequency towards the object. The detection system also includes a receiver configured to receive a second light beam reflected from the object, and a detector positioned within the receiver. The second light beam has a second frequency as a result of a non-linear optical response of a surface of the object to the first light beam. The detector is configured to detect the object based on the second frequency of the second light beam.
    Type: Grant
    Filed: May 22, 2012
    Date of Patent: February 24, 2015
    Assignee: The Boeing Company
    Inventors: Jeffrey H. Hunt, Nicholas Koumvakalis
  • Patent number: 8964169
    Abstract: The invention relates to the topographic technique field, and provides a ranging method and a system, wherein the ranging method comprises the following steps: modulating measured beam, by a modulated signal of which the frequency is continuously changed over time; emitting the modulated measured beam to a measured object; receiving the reflected measured beam and converting the beam into the measured signals; and comparing the frequency of the modulated signal generated when the measured beam is received with the frequency of the measured signals, thus determining the measured distance.
    Type: Grant
    Filed: November 11, 2011
    Date of Patent: February 24, 2015
    Assignee: Mileseey Technology, Inc.
    Inventors: Zhi Chou, Weiming Li, Hongfei Wang
  • Patent number: 8958056
    Abstract: A triangulation light sensor includes at least one light transmitter for transmitting a light signal into a detection zone, a light receiver having a plurality of receiver elements for receiving light from the detection zone reflected diffusely and/or specularly, and a reception optics arranged between the detection zone and the light receiver in the beam path, with the position of a light spot produced on the light receiver in a triangulation direction by the reflected light resulting in dependence on the distance of the object. The reception optics includes at least one multisegmented lens element having a plurality of lens segments with mutually spaced apart optical axes in the triangulation direction and at least one freeform lens element or one diffractive-optical element having a multisegmented lens element having a plurality of lens segments with optical axes spaced apart from one another in the triangulation direction.
    Type: Grant
    Filed: February 15, 2013
    Date of Patent: February 17, 2015
    Assignee: Sick AG
    Inventors: Friedhelm Wiethege, Gerhard Merettig
  • Patent number: 8947647
    Abstract: In one aspect, a method includes forming range bins from range compressed data, the range compressed data comprising a train of coherent pulses formed based on a transmitted signal from a laser detection and ranging (LADAR) sensor and having a large time-bandwidth product and for each range bin, compensating for motion of the LADAR sensor, performing a Fourier transform on the compressed range data, determining a centroid of individual velocity measurements and performing Fourier transform of the centroid to determine a vibration.
    Type: Grant
    Filed: December 13, 2011
    Date of Patent: February 3, 2015
    Assignee: Raytheon Company
    Inventors: Maurice J. Halmos, Jean-Paul Bulot, Matthew J. Klotz
  • Patent number: 8928865
    Abstract: A detection apparatus and method for FMCW LIDAR employ signals whose frequencies are modified so that low-cost and low-speed photodetector arrays can be employed for range detection. The LIDAR includes a single mode swept frequency laser (SFL), whose optical frequency is varied with time, as a result of which, a target beam reflected back by the target is shifted in frequency from a reference beam by an amount that is proportional to the relative range z to the target. The reflected target beam is combined with the reference beam and detected by the photodetector array. The difference between the frequencies of the reflected target beam and the reference beam is reduced to a level that is within the bandwidth of the photodetector array by first modulating the target and/or reference beam.
    Type: Grant
    Filed: August 3, 2012
    Date of Patent: January 6, 2015
    Assignee: Telaris, Inc.
    Inventor: George Rakuljic
  • Patent number: 8908154
    Abstract: Coordinate measurement device configured to send a first beam of light to a target includes first and second light sources configured to emit first and second lights having differing first and second wavelengths; fiber-optic coupler that includes three ports, a first port configured to accept a first portion of the first light, a second port configured to accept a second portion of the second light, a third port configured to transmit a third light which includes a portion of the first and second portions; first and second angle measuring devices configured to measure first and second angles of rotation; distance meter configured to measure a first distance from the device to the target based at least in part on a third portion of the second beam received by an optical detector; and a processor configured to provide 3D coordinates of the target.
    Type: Grant
    Filed: March 27, 2012
    Date of Patent: December 9, 2014
    Assignee: Faro Technologies, Inc.
    Inventors: Robert E. Bridges, Jacob J. Mertz
  • Patent number: 8908156
    Abstract: An electro-optical distance measuring device having a photodetection unit comprising a plurality of pixels arranged in a predetermined arrangement is disclosed. A signal processing unit has a storage unit for storing the detection result in correspondence with each of the pixels, wherein the signal processing control unit sequentially changes a position of the division for every cycle wave at which the photodetection amount is detected and continues detections until a detected range becomes at least one cycle or more. The arithmetic processing unit calculates a waveform for at least one cycle stored in the storage unit for each pixel, obtains a phase difference of the waveform with respect to the irradiated distance measuring light, and calculates the distance based on the phase difference.
    Type: Grant
    Filed: January 5, 2011
    Date of Patent: December 9, 2014
    Assignee: Kabushiki Kaisha TOPCON
    Inventors: Fumio Ohtomo, Kaoru Kumagai
  • Patent number: 8891066
    Abstract: In the method for geo-referencing of optical remote sensing images of an area of the earth's surface, the geo-referencing is corrected based on an SAR image which is geo-referenced.
    Type: Grant
    Filed: November 18, 2009
    Date of Patent: November 18, 2014
    Assignee: Deutsches Zentrum für Luft- und Raumfahrt e.V.
    Inventors: Richard Bamler, Peter Reinartz, Sahil Suri