Of Back-scattered Light Patents (Class 356/342)
  • Patent number: 10991261
    Abstract: An airfield visibility monitoring system may include a measurement unit to emit one or more pulses of electromagnetic radiation along an aircraft glideslope associated with a runway and detect backscattered radiation from the glideslope associated with the emitted pulses. The measurement unit may further determine round-trip times between emission of the one or more pulses and detection of the backscattered radiation. The system may further include a controller. The controller may determine values of a visibility metric for multiple distances from the measurement unit along the glideslope based on the detected backscattered radiation and round-trip times, determine values of the visibility metric for multiple altitudes based on the values of the visibility metric along the glideslope, and direct an airfield communication unit to broadcast values of the visibility metric for at least some of the altitudes.
    Type: Grant
    Filed: August 9, 2018
    Date of Patent: April 27, 2021
    Assignee: Rockwell Collins, Inc.
    Inventor: Carlo L. Tiana
  • Patent number: 10924714
    Abstract: It is disclosed optical communication system and method capable or monitoring underwater information in real time. An optical communication system may be configured to include a first optical communication module configured with a photographing unit which is installed on objects moving underwater and photographs underwater pictures or images and a first optical transceiver module for transmitting and receiving image information for the underwater pictures or images photographed in the photographing unit; a second optical communication module for receiving the image information from the first optical transceiver module of the first optical communication module and transmitting the image information to an external device or a displaying unit.
    Type: Grant
    Filed: November 6, 2019
    Date of Patent: February 16, 2021
    Assignee: BORSYS CORP.
    Inventors: Jin Il Kang, Hyun Joong Son
  • Patent number: 10876947
    Abstract: An optical particle sensor apparatus is equipped with a housing (MD) having an optical exit region (OF); an optical emitter device (LD) in the housing that is set up to emit an optical measurement beam (OB) for capturing particles; a focusing lens device (LE) in the housing for directing the optical measurement beam through the optical exit region to outside the housing in a focus region (FA), within which particle capturing is performable; an optical detector device (DD) arranged in the housing and set up to capture the measurement beam (OB?) scattered by particles (P) and to output information produced using an algorithm relating to the presence of the particles; and a controllable adaptation device (C, E), which is set up to adapt at least one optical property of the lens device and/or of the optical emitter device and/or of the optical detector device based on an input signal (ES; ES?) that provides information relating to a presence and to optical properties of an external optical window (EF) arranged be
    Type: Grant
    Filed: July 17, 2019
    Date of Patent: December 29, 2020
    Assignees: Robert Bosch GmbH, TRUMPF PHOTONIC COMPONENTS GMBH
    Inventors: Stefan Weiss, Alexander Herrmann, Robert Wolf, Sören Sofke
  • Patent number: 10871779
    Abstract: A system and method include scanning a light detection and ranging (LIDAR) device through a range of orientations corresponding to a scanning zone while emitting light pulses from the LIDAR device. The method also includes receiving returning light pulses corresponding to the light pulses emitted from the LIDAR device and determining initial point cloud data based on time delays between emitting the light pulses and receiving the corresponding returning light pulses and the orientations of the LIDAR device. The initial point cloud data has an initial angular resolution. The method includes identifying, based on the initial point cloud data, a reflective feature in the scanning zone and determining an enhancement region and an enhanced angular resolution for a subsequent scan to provide a higher spatial resolution in at least a portion of subsequent point cloud data from the subsequent scan corresponding to the reflective feature.
    Type: Grant
    Filed: November 14, 2018
    Date of Patent: December 22, 2020
    Assignee: Waymo LLC
    Inventors: Bradley Templeton, Pierre-Yves Droz, Jiajun Zhu
  • Patent number: 10663564
    Abstract: A lidar system includes a lighting module configured to (i) select a wavelength from among a plurality of wavelength values, for a particular time period, and (ii) emit light at the selected wavelength. The lighting module emits light at different wavelengths during at least two adjacent periods of time. The lidar system further includes a scanner configured to direct the pulse of light to illuminate a respective region within a field of regard of the lidar system and a receiver module configured to (i) receive a light signal and (ii) determine whether the received light signal includes the light emitted by the lighting module and scattered by a remote target, based at least in part on the wavelength selected by the lighting module.
    Type: Grant
    Filed: May 18, 2018
    Date of Patent: May 26, 2020
    Assignee: Luminar Technologies, Inc.
    Inventor: Joseph G. LaChapelle
  • Patent number: 10520592
    Abstract: In one example, a LIDAR device includes a light sources that emits light and a transmit lens that directs the emitted light to illuminate a region of an environment with a field-of-view defined by the transmit lens. The LIDAR device also includes a receive lens that focuses at least a portion of incoming light propagating from the illuminated region of the environment along a predefined optical path. The LIDAR device also includes an array of light detectors positioned along the predefined optical path. The LIDAR device also includes an offset light detector positioned outside the predefined optical path. The LIDAR device also includes a controller that determines whether collected sensor data from the array of light detectors includes data associated with another light source different than the light source of the device based on output from the offset light detector.
    Type: Grant
    Filed: December 31, 2016
    Date of Patent: December 31, 2019
    Assignee: Waymo LLC
    Inventors: Pierre-Yves Droz, Simon Verghese
  • Patent number: 10360676
    Abstract: There is provided a cell image evaluation device, method, and program to appropriately evaluate the state of a stem cell colony according to different changes in form of respective local regions of the cell colony. There are included a low magnification image acquisition unit 20 that acquires a cell image by imaging cells; a cell evaluation unit 23 that evaluates the cell image; and a local region information acquisition unit 21 that acquires the specific information of a local region in a colony region of the cells in the cell image. The cell evaluation unit 23 determines, for each local region in the colony region, an evaluation method for a cell image in the local region based on the specific information of the local region, and evaluates the cell image of the local region using the determined evaluation method.
    Type: Grant
    Filed: July 26, 2016
    Date of Patent: July 23, 2019
    Assignee: FUJIFILM Corporation
    Inventor: Tsuyoshi Matsumoto
  • Patent number: 10176557
    Abstract: Described herein is a method for enhancing image data that includes dividing an image into multiple regions. The method includes measuring variations in pixel intensity distribution of the image to determine high pixel intensity variations for identifying an intensity-changing region. The method includes calculating a histogram of intensity distribution of pixel intensity values for the intensity-changing region without calculating a histogram of intensity distribution of pixel intensity values for each region of the multiple regions. The method also includes determining a transformation function based on the intensity distribution for the intensity-changing region. The method includes applying the transformation function to modify an intensity for each pixel in the image to produce an enhanced image in real time. The method also includes detecting in the enhanced image a horizon for providing to an operator of a vehicle an indication of the horizon in the image on a display in the vehicle.
    Type: Grant
    Filed: September 7, 2016
    Date of Patent: January 8, 2019
    Assignee: The Boeing Company
    Inventors: Qin Jiang, Yuri Owechko
  • Patent number: 9989629
    Abstract: A lidar system includes a lighting module configured to (i) select a wavelength from among a plurality of wavelength values, for a particular time period, and (ii) emit light at the selected wavelength. The lighting module emits light at different wavelengths during at least two adjacent periods of time. The lidar system further includes a scanner configured to direct the pulse of light to illuminate a respective region within a field of regard of the lidar system and a receiver module configured to (i) receive a light signal and (ii) determine whether the received light signal includes the light emitted by the lighting module and scattered by a remote target, based at least in part on the wavelength selected by the lighting module.
    Type: Grant
    Filed: October 6, 2017
    Date of Patent: June 5, 2018
    Assignee: LUMINAR TECHNOLOGIES, INC.
    Inventor: Joseph G. LaChapelle
  • Patent number: 9739207
    Abstract: The invention concerns an aircraft propulsion control system in which a gas turbine engine has an actuable flow opening for control of flow to or from a portion of the engine. One or more sensor is arranged to sense a condition indicative of vapor trail formation by the exhaust flow from the engine. A controller is arranged to control actuation of the flow opening so as to reduce the efficiency of the engine upon sensing of said condition by the one or more sensor. In one example, the flow opening is a variable area fan nozzle.
    Type: Grant
    Filed: March 11, 2015
    Date of Patent: August 22, 2017
    Assignee: ROLLS-ROYCE plc
    Inventors: Malcolm Hillel, Peter Swann, Andrew Martin Rolt, Paul Fletcher
  • Patent number: 9645160
    Abstract: The automatic analysis device measures time sequential data on a scattered light amount as reaction process data, and quantitatively determines the concentration of an analyte from a change in light amount. The automatic analysis device has a function of selecting reaction process data to be used for quantitative determination from the reaction process data obtained by measurement using a plurality of light receivers at different angles. As a result of using this function, data is selected from the reaction process data obtained by measurement using the plurality of light receivers at different angles in accordance with the concentration of the analyte and whether the priority is given to high sensitivity in the case where sensitivity is prioritized or a dynamic range, and the result of the quantitative determination is displayed.
    Type: Grant
    Filed: May 9, 2012
    Date of Patent: May 9, 2017
    Assignee: Hitachi High-Technologies Corporation
    Inventors: Sakuichiro Adachi, Tomonori Mimura, Hajime Yamazaki, Masaki Shiba
  • Patent number: 9383447
    Abstract: The invention relates to a method for light detecting and ranging (LIDAR) measurement of speeds, in which a laser beam is directed at the medium to be measured, and radiation which is subsequently emitted from the medium (16) is measured by a detector. In order to optimize the measurement, a spatial measurement range can be selected by activation and/or deactivation of the detector for at least one predetermined or regulated time duration of less than about 500 ?s after emission of a laser pulse to the medium to be measured. Furthermore, a direct reception Doppler LIDAR apparatus can be used to perform the method.
    Type: Grant
    Filed: June 30, 2009
    Date of Patent: July 5, 2016
    Assignee: EADS Deutschland GmbH
    Inventors: Nikolaus Schmitt, Wolfgang Rehm, Thomas Pistner
  • Patent number: 9138091
    Abstract: An apparatus and method for managing a liquid volume in a container includes a detector for detecting liquid volume changes in the container during a first preset period, a first determiner for determining whether the changes are lower than the first preset threshold value, and a presenter for presenting the first prompt information in case the changes are lower than the preset threshold value.
    Type: Grant
    Filed: July 6, 2010
    Date of Patent: September 22, 2015
    Assignee: KONINKLIJKE PHILIPS N.V.
    Inventors: Ying Zhao, Jun She
  • Patent number: 9109197
    Abstract: Provided is a device for concentrating and separating cells, which has a function for continuously concentrating cells; a function for then continuously arranging the concentrated cells in predetermined regions of a flow path; a function for simultaneously identifying shape and fluorescent emission in one-cell units on the basis of cell concentration and purification images, which serve to continuously separate and purify cells that have different properties in that they are either attracted to or repelled by an induction electrophoresis force of a predetermined frequency; and a function for identifying cells on the basis of this shape and fluorescent emission information and thereby separating and purifying the cells.
    Type: Grant
    Filed: March 31, 2010
    Date of Patent: August 18, 2015
    Assignees: Kanagawa Academy of Science and Technology, National University Corporation Tokyo Medical and Dental University
    Inventors: Kenji Yasuda, Masahito Hayashi, Akihiro Hattori
  • Patent number: 9055866
    Abstract: There is provided an inside observation apparatus of an endoscope and the like which can perform an inside observation for irradiating an illumination light to a minute area of a surface of an object (for example, a living tissue) having a light scattering property and detecting a back-scattered light of the illumination light, can increase a detected light amount by a simply and low cost configuration by making an area of a detection region larger than an illumination region, and can reduce a time necessary to detect an body (for example, a blood vessel) to be observed and detect a region deeper than a conventional region.
    Type: Grant
    Filed: December 27, 2010
    Date of Patent: June 16, 2015
    Assignee: OLYMPUS CORPORATION
    Inventors: Toshiharu Narita, Ken Fujinuma, Ryosuke Ito, Kenji Taira, Hideyuki Takaoka, Shinichi Takimoto, Hiroyuki Nishida, Hiroya Fukuyama
  • Patent number: 9041926
    Abstract: A method of optically determining the presence of volcanic ash within a cloud comprises emitting a circularly polarized illuminating beam within a cloud and analyzing backscatter light to identify the presence of volcanic ash within the cloud. The method further includes determining the degree to which the cloud has altered the polarization state of the emitted beam. The index of refraction of the backscatter light and the opacity of the backscatter light are also analyzed.
    Type: Grant
    Filed: February 12, 2014
    Date of Patent: May 26, 2015
    Assignee: Rosemount Aerospace Inc.
    Inventors: Mark D. Ray, Kaare J. Anderson
  • Patent number: 9031640
    Abstract: [Subject] To provide laser Doppler blood flow measuring method and device which achieve multi-dimensional measurement efficiently at a high degree of accuracy over a wide range with a simple optical system and device. [Solving Means] Laser light from a semiconductor laser 12 is split and formed into sheet lights Ls using a cylindrical lens 22, and the sheet lights Ls are crossed with each other at a predetermined position. A lens system 30 configured to form an image of scattered lights into a linear shape at a linear irradiation site Lx where the sheet lights Ls cross with each other is provided. An optical fiber array 32 having a plurality of optical fibers 34 is provided at an image-forming position of the lens system 30. Avalanche photodiodes 42 configured to convert the scattered lights which are shifted in frequency by the Doppler effect caused by the blood flow into electric signals for the each optical fiber 34 are provided.
    Type: Grant
    Filed: December 19, 2008
    Date of Patent: May 12, 2015
    Assignees: Institute of National Colleges of Technology, Japan, National Univeristy Corporation of Toyama
    Inventors: Tadashi Hachiga, Hiroki Ishida, Shunsuke Akiguchi, Hiroki Shirakawa, Tsugunobu Andoh, Yasushi Kuraishi
  • Patent number: 9026278
    Abstract: A method of using LIDAR on an airborne vehicle is described. A beam of radiation is transmitted to target areas at least one of above, below, and in front of the airborne vehicle, the target areas including particles or objects. Scattered radiation is received from the target areas. Respective characteristics of the scattered radiation are determined. An air turbulence factor or characteristics are determined from the respective characteristics. The airborne vehicle is controlled based on the air turbulence factor, such that turbulence experienced by the airborne vehicle is minimized. Alternatively, the airborne vehicle is controlled based on the characteristics to avoid colliding with the one or more objects. In another example, the airborne vehicle is controlled based on the characteristics to reduce headwind or increase tailwind, and substantially reduce a carbon footprint of the aircraft.
    Type: Grant
    Filed: May 22, 2012
    Date of Patent: May 5, 2015
    Assignee: Optical Air Data Systems, LLC
    Inventors: Elizabeth A. Dakin, Priyavadan Mamidipudi, Philip L. Rogers
  • Patent number: 9007581
    Abstract: An inspection method and an inspection device, or apparatus each capable of conducting composition analysis of a defect detected by elastic or stokes scattered light, an inspection surface or defect on the surface of the inspection surface, or a defect on the surface of the inspection object and its internal composition. A surface inspection method for optically detecting elastic or stokes scattering or inelastic or anti-stokes scattered light from inside the surface of the inspection object, for detecting existence of defects of the inspection object and features of the defects, for detecting positions of the detected defects on the surface of the inspection object, classifying and analyzing the detected defects in accordance with their features on the basis of the positions of the defects and the features of the defects or the classification result of the defects.
    Type: Grant
    Filed: September 15, 2012
    Date of Patent: April 14, 2015
    Assignee: Hitachi High-Technologies Corporation
    Inventors: Izuo Horai, Hirokazu Koyabu, Yuta Urano, Takahiro Jingu
  • Patent number: 8994941
    Abstract: An optical system includes a radiation source, a radiation-illuminating device, and a radiation-collecting device. The radiation source is configured to generate radiation. The radiation-illuminating device is optically coupled to the radiation source and configured to direct and focus the radiation obliquely with respect to an optical axis thereof onto a sample. The radiation-collecting device is configured to collect back-scattered radiation scattered from the sample and spatially separated from noise radiation. Associated apparatus and method are also described.
    Type: Grant
    Filed: November 28, 2012
    Date of Patent: March 31, 2015
    Assignee: General Electric Company
    Inventor: Xiaolei Shi
  • Publication number: 20150070700
    Abstract: A method of optically determining the presence of volcanic ash within a cloud comprises emitting a circularly polarized illuminating beam within a cloud and analyzing backscatter light to identify the presence of volcanic ash within the cloud. The method further includes determining the degree to which the cloud has altered the polarization state of the emitted beam. The index of refraction of the backscatter light and the opacity of the backscatter light are also analyzed.
    Type: Application
    Filed: February 12, 2014
    Publication date: March 12, 2015
    Applicant: Rosemount Aerospace Inc.
    Inventors: Mark D. Ray, Kaare J. Anderson
  • Patent number: 8939081
    Abstract: A weapon-locating ladar system estimates a backward trajectory of an airborne target by using flow field measurements to follow the wake turbulence trailing the airborne target from a position at which the target is detected backwards until the wake is no longer observable. The system may use the backward trajectory to estimate the point-of-origin of the target. The system may also use the flow field measurements along the backward trajectory to classify the target. Target classification may be used to refine the point-of-origin estimate, to influence counter-fire or to adapt the flow field measurements.
    Type: Grant
    Filed: January 15, 2013
    Date of Patent: January 27, 2015
    Assignee: Raytheon Company
    Inventors: Duane Donald Smith, Robert William Byren
  • Patent number: 8930049
    Abstract: A method of using a light detection system for increasing the accuracy of a precision airdrop is described. Radiation is transmitted to target areas between an airborne vehicle and a dropzone target. Scattered radiation is received from the target areas. Respective wind characteristics are determined from the scattered radiation and a wind velocity map is generated, based on the respective wind characteristics, between the airborne vehicle, and at least the dropzone target. An aerial release point for the precision airdrop is computed based on the generated wind velocity map and a location of the dropzone target.
    Type: Grant
    Filed: May 31, 2012
    Date of Patent: January 6, 2015
    Assignee: Optical Air Data Systems, LLC
    Inventors: Priyavadan Mamidipudi, Elizabeth A. Dakin, Daniel C. Dakin, Philip L. Rogers, Edgar K. Dede, Peter Gatchell, Madhukiran Panabakam, Lance Leclair, Chia-Chen Chang, Rupak Changkakoti
  • Patent number: 8917393
    Abstract: A method and apparatus are disclosed for providing image data for generating an image of a region of a target object. The method includes the steps of providing incident radiation, focusing the radiation downstream or upstream of a target object and via at least one detector located downstream of a focusing element, detecting an intensity of radiation scattered by the target object at an observation plane offset from a back focal plane associated with the focusing element.
    Type: Grant
    Filed: December 4, 2008
    Date of Patent: December 23, 2014
    Assignee: Phase Focus Limited
    Inventor: Andrew Maiden
  • Publication number: 20140347664
    Abstract: An apparatus for identifying defects within the volume of a transparent sheet, such as a glass sheet, is provided. The apparatus includes an illumination device that directs incident light onto at least a portion of a surface of the sheet so as to illuminate the sheet, and an image detector onto which the light backscattered from the sheet is directed to image the sheet. The apparatus generates at least two interference images under different capturing conditions in order to perform identification of defects by evaluating the at least two interference images.
    Type: Application
    Filed: August 7, 2014
    Publication date: November 27, 2014
    Inventors: Bruno Schrader, Frank Macherey, Holger Wegener, Michael Stelzl
  • Patent number: 8873053
    Abstract: The present invention relates to a method for determining at least one gas condition at a location in a combustion chamber of a power plant or a combined heat and power plant by means of a laser pulse. The method comprises emitting (S1) the laser pulse into the chamber, determining (S2) a first point of time at which the laser pulse is emitted into the chamber, detecting (S3) laser light backscattered by gas molecules at the location in the chamber, determining (S4) a second point of time at which the laser light backscattered by the gas molecules is detected, determining (S5) the location based on the first point of time, the second point of time, and a pulse length of the laser pulse, and determining (S5) the at least one gas condition at the location based on at least one characteristic of the backscattered laser light detected at the second point of time. A gas measurement system and a combustion system are also presented herein.
    Type: Grant
    Filed: March 7, 2012
    Date of Patent: October 28, 2014
    Assignee: Vattenfall AB
    Inventors: Shahriar Badiei, Magnus Berg
  • Publication number: 20140300896
    Abstract: An optical interrogation system, e.g., an OFDR-based system, measures local changes of index of refraction of a medium contained within a light guiding tube and includes an optical interferometric interrogator, optical detection circuitry, and a data processor. The data processor initiates a sweep of the light source and guide light from an interrogating light source into a medium contained by a tube which restricts movement of particles provided into the tube, where the medium is subjected to a driving force that overcomes resistance to movement of particles through the medium in the tube. The optical interferometric interrogator provides an optical interference pattern associated with a group of particles having moved in the tube as a result of the driving force. Based on the optical interference pattern, the data processor identifies a current location of the group of particles in the tube.
    Type: Application
    Filed: November 5, 2012
    Publication date: October 9, 2014
    Inventor: Mark E. Froggatt
  • Publication number: 20140268143
    Abstract: The invention relates to a method for determining the size d of a transparent particle, according to which method the particle is illuminated with light from a light source, a radiation detector measures a time-resolved intensity profile of light of the light source scattered by the particle, a reflection peak (10) and a refraction peak are determined in the intensity profile and the size d of the particle is determined based on a time difference between the reflection peak (10) and the refraction peak.
    Type: Application
    Filed: August 17, 2012
    Publication date: September 18, 2014
    Applicant: TECHNISCHE UNIVERSITAET DARMSTADT
    Inventors: Cameron Tropea, Walter Schaefer
  • Patent number: 8836922
    Abstract: A LIDAR device may transmit light pulses originating from one or more light sources and may receive reflected light pulses that are then detected by one or more detectors. The LIDAR device may include a lens that both (i) collimates the light from the one or more light sources to provide collimated light for transmission into an environment of the LIDAR device and (ii) focuses the reflected light onto the one or more detectors. The lens may define a curved focal surface in a transmit path of the light from the one or more light sources and a curved focal surface in a receive path of the one or more detectors. The one or more light sources may be arranged along the curved focal surface in the transmit path. The one or more detectors may be arranged along the curved focal surface in the receive path.
    Type: Grant
    Filed: August 20, 2013
    Date of Patent: September 16, 2014
    Assignee: Google Inc.
    Inventors: Gaetan Pennecot, Pierre-Yves Droz, Drew Eugene Ulrich, Daniel Gruver, Zachary Morriss, Anthony Levandowski
  • Patent number: 8831884
    Abstract: In one aspect, methods of determining a size distribution of water droplets in a cloud are described herein. In some embodiments, a method of determining a size distribution of water droplets in a cloud comprises sampling a depth of the cloud with a beam of electromagnetic radiation, measuring a scattering signal of the electromagnetic radiation returned from the cloud over a range of field of view angles to provide a measured scattering curve [ptotal(?)], removing a portion of the measured scattering curve, replacing the removed portion with an extrapolation of the remaining measured scattering curve to provide an estimated scattering curve, and determining a first estimate droplet size distribution [n(1)(D)] from the estimated scattering curve.
    Type: Grant
    Filed: October 25, 2011
    Date of Patent: September 9, 2014
    Assignee: Rosemount Aerospace Inc.
    Inventors: Mark D Ray, Kaare J Anderson, Michael P Nesnidal
  • Patent number: 8804119
    Abstract: A particle detection system including; at least one light source adapted to illuminate a volume being monitored at at least two wavelengths; a receiver having a field of view and being adapted to receive light from at least one light source after said light has traversed the volume being monitored and being adapted to generate signals indicative of the intensity of light received at regions within the field of view of the receiver; a processor associated with the receiver adapted to process the signals generated by the receiver to correlate light received at at least two wavelengths in corresponding regions within the field of view of the receiver and generate an output indicative of the relative level of light received at the two wavelengths.
    Type: Grant
    Filed: June 10, 2009
    Date of Patent: August 12, 2014
    Assignee: Xtralis Technologies Ltd
    Inventors: Ron Knox, Karl Boettger, Kemal Ajay
  • Patent number: 8797531
    Abstract: A beam detector (10) including a light source (32), a receiver (34), and a target (36), acting in co-operation to detect particles in a monitored area (38). The target (36), reflects incident light (40), resulting in reflected light (32) being returned to receiver (34). The receiver (34) is a receiver is capable of recording and reporting light intensity at a plurality of points across its field of view. In the preferred form the detector (10) emits a first light beam (3614) in a first wavelength band; a second light beam (3618) in a second wavelength band; and a third light beam (3616) in a third wavelength band, wherein the first and second wavelengths bands are substantially equal and are different to the third wavelength band.
    Type: Grant
    Filed: May 3, 2010
    Date of Patent: August 5, 2014
    Assignee: Xtralis Technologies Ltd
    Inventors: Ron Knox, Karl Boettger, Kemal Ajay
  • Publication number: 20140192356
    Abstract: A method for detecting atmospheric icing potential comprises emitting, by a lidar (light detection and ranging) entity (108a, 108b) such as a Doppler lidar entity, electromagnetic radiation to the atmosphere and receiving radiation backscattered from the aerosol, such as a cloud, present in the atmosphere (304), determining an indication of signal intensity, such as the CNR (carrier-to-noise ratio), on the basis of the received backscattered signal relative to one or more distances such as heights from a predetermined basic level such as the location of the lidar (306), comparing the indication of signal intensity with at least one predetermined reference in order to obtain an indication of the likelihood of cloud (110) presence at said one or more distances (308), and determining an indication of the icing potential at said number of distances on the basis of the comparison and an indication of the temperature at said one or more distances (310). An arrangement for executing the method is presented.
    Type: Application
    Filed: June 15, 2012
    Publication date: July 10, 2014
    Applicant: TEKNOLOGIAN TUTKIMUSKESKUS VTT
    Inventors: Petteri Antikainen, Andrea Vignaroli, Esa Peltola
  • Publication number: 20140146316
    Abstract: An optical system includes a radiation source, a radiation-illuminating device, and a radiation-collecting device. The radiation source is configured to generate radiation. The radiation-illuminating device is optically coupled to the radiation source and configured to direct and focus the radiation obliquely with respect to an optical axis thereof onto a sample. The radiation-collecting device is configured to collect back-scattered radiation scattered from the sample and spatially separated from noise radiation. Associated apparatus and method are also described.
    Type: Application
    Filed: November 28, 2012
    Publication date: May 29, 2014
    Applicant: GENERAL ELECTRIC COMPANY
    Inventor: Xiaolei Shi
  • Publication number: 20140132943
    Abstract: A localized dynamic light scattering measurement system includes a beam displacer for splitting an incident beam having two orthogonal linearly polarized beam components with slightly different frequencies into two orthogonal linearly polarized output beams focused onto an object to be measured. The beam displacer cooperates with an iris to collect and recombine scattering beams each reversely backscattered at 180 degrees from the object so as to form a signal beam, which is polarized by a polarizer to produce two polarization components, thereby generating a heterodyne interference signal associated with the polarization components. A signal processing unit obtains measurement data on the object based on power spectrum or autocorrelation data corresponding to the heterodyne interference signal.
    Type: Application
    Filed: November 12, 2012
    Publication date: May 15, 2014
    Inventor: Lidek Chou
  • Patent number: 8724107
    Abstract: One embodiment provides an annular optical device (100), comprising: an annular meso-optic (1) including an annulus (11) centered about an axis of revolution (A); and a secondary optical structure (2) substantially coaxial within the annulus (11) of the annular meso-optic (1), wherein the secondary optical structure (2) and the annular meso-optic (1) are separated by a media (12) comprising a media refractive index that is lower than a secondary optical structure refractive index, with the secondary optical structure (2) being configured to hold a specimen to be radiated by impinging electromagnetic radiation directed into the secondary optical structure (2) substantially along the axis of revolution (A), wherein re-directed radiation from the specimen is allowed into the annular meso-optic (1) by the secondary optical structure (2) if an angle of incidence of the re-directed radiation exceeds the angle of Total Internal Reflectance. Other embodiments are descried and claimed.
    Type: Grant
    Filed: August 12, 2013
    Date of Patent: May 13, 2014
    Assignee: Hach Company
    Inventor: Perry A. Palumbo
  • Patent number: 8711353
    Abstract: There is disclosed improved apparatus and methods for detection of shape, size and intrinsic fluorescence properties of a fluid borne particle wherein the apparatus comprises a laser, two light sources, two detectors, and optionally a third detector. The apparatus is particularly suitable for detection of airborne biological particles.
    Type: Grant
    Filed: January 22, 2009
    Date of Patent: April 29, 2014
    Assignee: The Secretary of State for Defence
    Inventors: Paul Henry Kaye, Warren Roy Stanley
  • Patent number: 8705040
    Abstract: An apparatus and method for determining characteristics of particles, by measuring characteristics which are related to the velocity of the particles. Particle size distribution is determined from motion of the particles in an acceleration field, or from Brownian motion of the particles. Zeta potential and particle mobility are determined by measuring velocity related characteristics of charged particles in an electric field. Particle velocity characteristics are determined by measuring dynamic properties of light, which is scattered by the particles. A light source illuminates the particles. Scattered light, from the particles, is mixed with light, from the light source, onto at least one light detector. The detector produces a signal, which is indicative of velocity related characteristics of the particles. The velocity characteristics are also determined by measuring light scattered from particles moving through an illumination pattern, with a periodic intensity structure.
    Type: Grant
    Filed: March 30, 2010
    Date of Patent: April 22, 2014
    Inventor: Michael Trainer
  • Patent number: 8699028
    Abstract: A cell/particle analyzing device includes a light-emitting unit, a light-diverting unit, a first receiving unit and a second receiving unit. The light-emitting unit generates a first light beam. The light-diverting unit is connected to the light-emitting unit and has an input end, a bidirectional transceiving end and an output end. The input end receives the first light beam generated by the light-emitting unit. The bidirectional transceiving end transmits the first light beam generated by the light-emitting unit and receives a second light beam. The output end outputs the second light beam. The first receiving unit is connected to the output end of the light-diverting unit and receives the second light beam. The second receiving unit is aligned with the bidirectional transceiving end.
    Type: Grant
    Filed: December 12, 2011
    Date of Patent: April 15, 2014
    Assignee: National Pingtung University of Science and Technology
    Inventors: Yao-Nan Wang, Lung-Ming Fu, Chang-Hsien Fu, Chien-Hsiung Tsai
  • Publication number: 20140085635
    Abstract: A sensor device (340) for determining a flow characteristic of an object (341) being movable in an element (342) comprises a light emitting unit (344) configured for emitting light towards the element (342) and a light detecting unit (344) configured for detecting light scattered back from the element (342). The sensor device (340) comprises an optical unit (346) configured for spatially separating a light incidence element portion (348) of the element (342) and a light detection element portion (350) of the element (342) from one another, wherein the light incidence element portion (348) is associated with the emitted light inciding on the element (342) and the light detection element portion (350) is associated with the back-scattered light scattered back from the element (342) for detection.
    Type: Application
    Filed: May 22, 2012
    Publication date: March 27, 2014
    Applicant: KONINKLIJKE PHILIPS N.V.
    Inventors: Alexander Marc Van Der Lee, Jeroen Veen
  • Patent number: 8681331
    Abstract: A microscopy or micro-spectroscopy system is disclosed that includes a first light source, a second light source, a modulator, an optical assembly and a processor. The first light source is for providing a first illumination field at a first optical frequency ?1 and the second light source is for providing a second illumination field at a second optical frequency ?2. The modulator is for modulating a property of the second illumination field at a modulation frequency f of at least 100 kHz to provide a modulated second illumination field. The optical assembly includes focusing optics and an optical detector system. The focusing optics is for directing and focusing the first illumination field and the modulated second illumination field through an objective lens toward the common focal volume along an excitation path.
    Type: Grant
    Filed: December 19, 2012
    Date of Patent: March 25, 2014
    Assignee: President and Fellows of Harvard College
    Inventors: Sunney Xiaoliang Xie, Christian W. Freudiger, Brian G. Saar
  • Patent number: 8675184
    Abstract: The invention relates to a method for Doppler light detection and ranging (LIDAR) measurement of speeds. A laser beam is directed at the medium to be measured, and radiation which is then emitted by the medium is measured by a detector. In order to allow better control of the dynamic range of a direct reception Doppler LIDAR apparatus, a multiplicity of laser pulses can be transmitted per measurement, and a multiplicity of laser pulses can be received by the detector per measurement. A direct reception Doppler LIDAR apparatus can be suitable for carrying out the method.
    Type: Grant
    Filed: June 30, 2009
    Date of Patent: March 18, 2014
    Assignee: EADS Deutschland GmbH
    Inventors: Nikolaus Schmitt, Wolfgang Rehm, Thomas Pistner
  • Patent number: 8670120
    Abstract: Device for analyzing a polyphase mixture via a light beam backscattered by said mixture, comprising: a vertical cell capable of containing the polyphase mixture; means for emitting a light beam in the direction of the cell, in such a way that the light beam lies in a vertical plane (PV) covering at least the height (hc) of the cell containing the polyphase mixture; means for receiving a light beam backscattered by the polyphase mixture, covering the height of the backscattered light beam, extending over the height (hc) of the cell containing the polyphase mixture; optical conjugation means placed between the cell and the means for receiving the backscattered beam, the receiving means comprising a matrix center forming a surface for receiving the backscattered beam, lying in vertical and horizontal directions; and means for analyzing the backscattered beam received by the matrix sensor, the light beam emitted in the direction of the cell, adopting, at its interface between the internal surface of the wall of t
    Type: Grant
    Filed: November 26, 2009
    Date of Patent: March 11, 2014
    Assignee: Formulaction
    Inventor: Laurent Brunel
  • Patent number: 8654330
    Abstract: The present invention is a device for measuring the intensity of the light scattered by a thin film of a colloidal medium, comprising a monochromatic light source, a convergent optical system focusing the source onto the thin film to be analyzed comprising a dioptric element with one of the faces thereof constituting a first wall defining the thin film, at least one photosensitive detector producing a signal representing light scattered or backscattered by the thin film and means for processing the signal. A second wall of the device has a plane surface at the end of a rod.
    Type: Grant
    Filed: June 24, 2010
    Date of Patent: February 18, 2014
    Assignees: IFP Energies Nouvelles, Cordouan Technologies
    Inventors: Didier Frot, David Jacob
  • Publication number: 20140028998
    Abstract: There is disclosed improved apparatus and methods for detection of shape, size and intrinsic fluorescence properties of a fluid borne particle wherein the apparatus comprises a laser, two light sources, two detectors, and optionally a third detector. The apparatus is particularly suitable for detection of airborne biological particles.
    Type: Application
    Filed: August 2, 2013
    Publication date: January 30, 2014
    Applicant: The Secretary of State for Defence
    Inventors: Paul Henry Kaye, Warren Roy Stanley, Emma Virginia Jane Foot
  • Publication number: 20140016130
    Abstract: The present invention relates to a method for determining at least one gas condition at a location in a combustion chamber of a power plant or a combined heat and power plant by means of a laser pulse. The method comprises emitting (S1) the laser pulse into the chamber, determining (S2) a first point of time at which the laser pulse is emitted into the chamber, detecting (S3) laser light backscattered by gas molecules at the location in the chamber, determining (S4) a second point of time at which the laser light backscattered by the gas molecules is detected, determining (S5) the location based on the first point of time, the second point of time, and a pulse length of the laser pulse, and determining (S5) the at least one gas condition at the location based on at least one characteristic of the backscattered laser light detected at the second point of time. A gas measurement system and a combustion system are also presented herein.
    Type: Application
    Filed: March 7, 2012
    Publication date: January 16, 2014
    Applicant: VATTENFALL AB
    Inventors: Shahriar Badiei, Magnus Berg
  • Patent number: 8614792
    Abstract: In one general aspect, a method of measuring characteristics of particles in a liquid sample disclosed. The method includes supporting the liquid sample by surface tension and illuminating the supported liquid sample along an illumination axis with spatially coherent light so as to cause the coherent light to be scattered across a scattering zone. At least a portion of the scattered light is detected along a first predetermined scattering detection axis after it is scattered by the particles in the supported liquid sample. The illumination axis and the detection axis are oriented at an angle with respect to each other that allows substantially all of the light scattered at that angle across the scattering zone to be detected.
    Type: Grant
    Filed: March 4, 2010
    Date of Patent: December 24, 2013
    Assignee: Malvern Instruments, Ltd.
    Inventor: Jason Cecil William Corbett
  • Patent number: 8494724
    Abstract: A sensor system and method for detecting particles, in particular dirt particles or water droplets on a vehicle windscreen, comprising an optical sensor (3). The sensor (3) operates on the basis of light transit time and receives light signals (S) that are emitted by an emitter element and that are at least partially reflected, wherein the emitter element and the sensor (3) are located and aligned on the exterior of the vehicle, on or in the vicinity of a tailgate, hatchback or trunk lid (2) of said vehicle (1) in such a way that particles on the tailgate, hatchback or trunk lid (2) can be detected by means of the sensor (3) by sensing the part of light signals (S) emitted by the emitter element that is backscattered by the particles.
    Type: Grant
    Filed: September 23, 2008
    Date of Patent: July 23, 2013
    Assignee: Daimler AG
    Inventors: Juergen Luka, Axel Mueller
  • Patent number: 8487790
    Abstract: The described embodiments may provide a chemical detection circuit. The chemical detection circuit may comprise a pixel array, a pair of analog-to-digital converter (ADC) circuit blocks, a pair of input/output (I/O) circuit blocks coupled to the pair of ADC circuit blocks respectively, and a plurality of serial link terminals coupled to the pair of IO circuit blocks. The pixel array may comprise a plurality of chemically-sensitive pixels formed in columns and rows. Each chemically-sensitive pixel may comprise: a chemically-sensitive transistor, and a row selection device.
    Type: Grant
    Filed: June 30, 2011
    Date of Patent: July 16, 2013
    Assignee: Life Technologies Corporation
    Inventors: Keith Fife, Jungwook Yang
  • Publication number: 20130176560
    Abstract: Current apparatuses and methods for analysis of spectroscopic optical coherence tomography (SOCT) signals suffer from an inherent tradeoff between time (depth) and frequency (wavelength) resolution. In one non-limiting embodiment, multiple or dual window (DW) apparatuses and methods for reconstructing time-frequency distributions (TFDs) that applies two windows that independently determine the optical and temporal resolution is provided. For example, optical resolution may relate to scattering information about a sample, and temporal resolution may be related to absorption or depth related information. The effectiveness of the apparatuses and methods is demonstrated in simulations and in processing of measured OCT signals that contain fields which vary in time and frequency. The DW technique may yield TFDs that maintain high spectral and temporal resolution and are free from the artifacts and limitations commonly observed with other processing methods.
    Type: Application
    Filed: October 22, 2012
    Publication date: July 11, 2013
    Applicant: Duke University
    Inventor: Duke University