WO2000014513A3 - Speckle mitigation for coherent detection employing a wide band signal - Google Patents

Speckle mitigation for coherent detection employing a wide band signal

Info

Publication number
WO2000014513A3
WO2000014513A3 PCT/US1999/016303 US9916303W WO0014513A3 WO 2000014513 A3 WO2000014513 A3 WO 2000014513A3 US 9916303 W US9916303 W US 9916303W WO 0014513 A3 WO0014513 A3 WO 0014513A3
Authority
WO
WIPO (PCT)
Prior art keywords
target
train
pulse
illuminating
light
Prior art date
Application number
PCT/US1999/016303
Other languages
French (fr)
Other versions
WO2000014513A2 (en
WO2000014513A9 (en
Inventor
Victor H Hasson
Mark A Kovacs
Original Assignee
Textron Systems Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Textron Systems Corp filed Critical Textron Systems Corp
Priority to CA002337497A priority Critical patent/CA2337497C/en
Priority to IL14085099A priority patent/IL140850A/en
Priority to DE69911650T priority patent/DE69911650T2/en
Priority to EP99963835A priority patent/EP1144982B1/en
Priority to AU20198/00A priority patent/AU754831B2/en
Priority to JP2000569210A priority patent/JP3464650B2/en
Publication of WO2000014513A2 publication Critical patent/WO2000014513A2/en
Publication of WO2000014513A9 publication Critical patent/WO2000014513A9/en
Publication of WO2000014513A3 publication Critical patent/WO2000014513A3/en

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S7/00—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00
    • G01S7/48—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S17/00
    • G01S7/483—Details of pulse systems
    • G01S7/486—Receivers
    • G01S7/487—Extracting wanted echo signals, e.g. pulse detection
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
    • G01J9/00—Measuring optical phase difference; Determining degree of coherence; Measuring optical wavelength
    • G01J9/02—Measuring optical phase difference; Determining degree of coherence; Measuring optical wavelength by interferometric methods
    • G01J9/0215—Measuring optical phase difference; Determining degree of coherence; Measuring optical wavelength by interferometric methods by shearing interferometric methods
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S13/00—Systems using the reflection or reradiation of radio waves, e.g. radar systems; Analogous systems using reflection or reradiation of waves whose nature or wavelength is irrelevant or unspecified
    • G01S13/02—Systems using reflection of radio waves, e.g. primary radar systems; Analogous systems
    • G01S13/06—Systems determining position data of a target
    • G01S13/08—Systems for measuring distance only
    • G01S13/10—Systems for measuring distance only using transmission of interrupted, pulse modulated waves
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S13/00—Systems using the reflection or reradiation of radio waves, e.g. radar systems; Analogous systems using reflection or reradiation of waves whose nature or wavelength is irrelevant or unspecified
    • G01S13/87—Combinations of radar systems, e.g. primary radar and secondary radar
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S17/00—Systems using the reflection or reradiation of electromagnetic waves other than radio waves, e.g. lidar systems
    • G01S17/88—Lidar systems specially adapted for specific applications
    • G01S17/95—Lidar systems specially adapted for specific applications for meteorological use
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S7/00—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00
    • G01S7/48—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S17/00
    • G01S7/483—Details of pulse systems
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S7/00—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00
    • G01S7/48—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S17/00
    • G01S7/483—Details of pulse systems
    • G01S7/484—Transmitters
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S17/00—Systems using the reflection or reradiation of electromagnetic waves other than radio waves, e.g. lidar systems
    • G01S17/88—Lidar systems specially adapted for specific applications
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A90/00—Technologies having an indirect contribution to adaptation to climate change
    • Y02A90/10—Information and communication technologies [ICT] supporting adaptation to climate change, e.g. for weather forecasting or climate simulation

Abstract

Multiple independent spectral measurements of light reflected from a target are produced concurrently by illuminating the target with a train of laser pulses wherein the train of pulses produces a line spectrum within the illuminating signal. A characteristic dimension of receiving aperture is established based on illuminating wavelength, a cross-sectional dimension of illuminated region of a target, and the range between a target and the receiving aperture or image plane. The characteristic dimension is the spacing of peaks in a speckle pattern of an image plane. The speckle results from destructive and constructive interference of coherent light waves reflected from the target. The use of multiple receiving telescopes having the characteristic dimension, allows for independent measurements concurrently by each of the receiving telescopes. In addition, the generation of a train of pulses of illuminating radiation, or light, by laser is accomplished by mode-locked operation of the laser for synchronization of sinusoidal components at line frequencies of the pulse train spectrum, and wherein the spacing of the spectral lines is at least a decorrelation frequency. The number of spectral lines transmitted within each pulse equals the number of independent measurements attainable concurrently during reception of the reflected pulse train of light. Alternatively, in lieu of the line spectrum, the frequency may be swept linearly during the duration of a pulse such that the overall bandwidth of the frequency sweeping is equal to the bandwidth encompassed by the line spectrum of a pulse.
PCT/US1999/016303 1998-07-28 1999-07-19 Speckle mitigation for coherent detection employing a wide band signal WO2000014513A2 (en)

Priority Applications (6)

Application Number Priority Date Filing Date Title
CA002337497A CA2337497C (en) 1998-07-28 1999-07-19 Speckle mitigation for coherent detection employing a wide band signal
IL14085099A IL140850A (en) 1998-07-28 1999-07-19 Speckle mitigation for coherent detection employing a wide band signal
DE69911650T DE69911650T2 (en) 1998-07-28 1999-07-19 SPECKLE REDUCTION FOR COHERENT DETECTION BY A BROADBAND SIGNAL
EP99963835A EP1144982B1 (en) 1998-07-28 1999-07-19 Speckle mitigation for coherent detection employing a wide band signal
AU20198/00A AU754831B2 (en) 1998-07-28 1999-07-19 Speckle mitigation for coherent detection employing a wide band signal
JP2000569210A JP3464650B2 (en) 1998-07-28 1999-07-19 Speckle mitigation for coherent detectors using wideband signals

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
US9446198P 1998-07-28 1998-07-28
US60/094,461 1998-07-28
US09/277,003 1999-03-26
US09/277,003 US6184981B1 (en) 1998-07-28 1999-03-26 Speckle mitigation for coherent detection employing a wide band signal

Publications (3)

Publication Number Publication Date
WO2000014513A2 WO2000014513A2 (en) 2000-03-16
WO2000014513A9 WO2000014513A9 (en) 2000-08-03
WO2000014513A3 true WO2000014513A3 (en) 2001-10-04

Family

ID=26788912

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US1999/016303 WO2000014513A2 (en) 1998-07-28 1999-07-19 Speckle mitigation for coherent detection employing a wide band signal

Country Status (8)

Country Link
US (1) US6184981B1 (en)
EP (1) EP1144982B1 (en)
JP (1) JP3464650B2 (en)
AU (1) AU754831B2 (en)
CA (1) CA2337497C (en)
DE (1) DE69911650T2 (en)
IL (1) IL140850A (en)
WO (1) WO2000014513A2 (en)

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US6736321B2 (en) 1995-12-18 2004-05-18 Metrologic Instruments, Inc. Planar laser illumination and imaging (PLIIM) system employing wavefront control methods for reducing the power of speckle-pattern noise digital images acquired by said system
US6629641B2 (en) 2000-06-07 2003-10-07 Metrologic Instruments, Inc. Method of and system for producing images of objects using planar laser illumination beams and image detection arrays
DE19703730A1 (en) * 1997-01-31 1998-08-06 Daimler Benz Ag Method and device for removing image speckles during scanning laser image projection
US7028899B2 (en) * 1999-06-07 2006-04-18 Metrologic Instruments, Inc. Method of speckle-noise pattern reduction and apparatus therefore based on reducing the temporal-coherence of the planar laser illumination beam before it illuminates the target object by applying temporal phase modulation techniques during the transmission of the plib towards the target
US7584893B2 (en) * 1998-03-24 2009-09-08 Metrologic Instruments, Inc. Tunnel-type digital imaging system for use within retail shopping environments such as supermarkets
US6934038B2 (en) 2000-02-15 2005-08-23 Asml Holding N.V. Method for optical system coherence testing
US7954719B2 (en) * 2000-11-24 2011-06-07 Metrologic Instruments, Inc. Tunnel-type digital imaging-based self-checkout system for use in retail point-of-sale environments
US7077319B2 (en) * 2000-11-24 2006-07-18 Metrologic Instruments, Inc. Imaging engine employing planar light illumination and linear imaging
US7140543B2 (en) * 2000-11-24 2006-11-28 Metrologic Instruments, Inc. Planar light illumination and imaging device with modulated coherent illumination that reduces speckle noise induced by coherent illumination
US8042740B2 (en) * 2000-11-24 2011-10-25 Metrologic Instruments, Inc. Method of reading bar code symbols on objects at a point-of-sale station by passing said objects through a complex of stationary coplanar illumination and imaging planes projected into a 3D imaging volume
US7513428B2 (en) * 2001-11-21 2009-04-07 Metrologic Instruments, Inc. Planar laser illumination and imaging device employing laser current modulation to generate spectral components and reduce temporal coherence of laser beam, so as to achieve a reduction in speckle-pattern noise during time-averaged detection of images of objects illuminated thereby during imaging operations
WO2003079041A2 (en) * 2002-03-15 2003-09-25 Lockheed Martin Corporation System and method for target signature calculation and recognition
US7245742B2 (en) * 2002-07-01 2007-07-17 The Regents Of The University Of California Video surveillance with speckle imaging
US7841533B2 (en) * 2003-11-13 2010-11-30 Metrologic Instruments, Inc. Method of capturing and processing digital images of an object within the field of view (FOV) of a hand-supportable digitial image capture and processing system
DE102005034729B3 (en) * 2005-07-21 2007-02-08 Eads Deutschland Gmbh Method and lidar system for measuring air turbulence on board aircraft, airports and wind farms
US8030615B2 (en) * 2008-06-20 2011-10-04 Bowling Green State University Method and apparatus for detecting organic materials and objects from multispectral reflected light
US7767966B2 (en) * 2008-06-20 2010-08-03 Bowling Green State University Method and apparatus for detecting organic materials and objects from multispectral reflected light
DE102008031682A1 (en) * 2008-07-04 2010-03-11 Eads Deutschland Gmbh Direct Receive Doppler LIDAR Method and Direct Receive Doppler LIDAR Device
DE102009012646A1 (en) * 2009-03-11 2010-09-23 Amt Gmbh distance measurement
EP2385391A3 (en) * 2010-05-04 2012-08-01 Sony Corporation Active imaging device and method for speckle noise reduction
RU2655040C1 (en) * 2017-08-16 2018-05-23 Российская Федерация в лице Министерства промышленности и торговли Российской Федерации (Минромторг России) Doppler scanning lidar of an onboard basing
EP3683600B1 (en) * 2017-12-27 2022-08-24 Mitsubishi Electric Corporation Laser radar device
FR3082007B1 (en) * 2018-06-01 2020-09-11 Thales Sa METHOD AND SYSTEM FOR DETERMINING A CHARACTERISTIC DIMENSION OF A SHIP

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Also Published As

Publication number Publication date
IL140850A0 (en) 2002-02-10
JP3464650B2 (en) 2003-11-10
US6184981B1 (en) 2001-02-06
AU2019800A (en) 2000-03-27
WO2000014513A2 (en) 2000-03-16
IL140850A (en) 2004-06-01
AU754831B2 (en) 2002-11-28
DE69911650D1 (en) 2003-10-30
WO2000014513A9 (en) 2000-08-03
DE69911650T2 (en) 2004-07-01
EP1144982A2 (en) 2001-10-17
EP1144982B1 (en) 2003-09-24
CA2337497A1 (en) 2000-03-16
JP2002524731A (en) 2002-08-06
CA2337497C (en) 2007-03-13

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