IL127228A - Method for determining the phase difference of light waves propagated over two paths - Google Patents

Method for determining the phase difference of light waves propagated over two paths

Info

Publication number
IL127228A
IL127228A IL12722898A IL12722898A IL127228A IL 127228 A IL127228 A IL 127228A IL 12722898 A IL12722898 A IL 12722898A IL 12722898 A IL12722898 A IL 12722898A IL 127228 A IL127228 A IL 127228A
Authority
IL
Israel
Prior art keywords
light
frequency
groups
calculating
values
Prior art date
Application number
IL12722898A
Other languages
English (en)
Other versions
IL127228A0 (en
Original Assignee
Litton Systems Inc
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 Litton Systems Inc filed Critical Litton Systems Inc
Publication of IL127228A0 publication Critical patent/IL127228A0/xx
Publication of IL127228A publication Critical patent/IL127228A/en

Links

Classifications

    • 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
    • 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
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
    • G01B9/00—Measuring instruments characterised by the use of optical techniques
    • G01B9/02—Interferometers
    • G01B9/0209—Low-coherence interferometers
    • 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
    • G01J2009/0219—Measuring optical phase difference; Determining degree of coherence; Measuring optical wavelength by interferometric methods by shearing interferometric methods using two or more gratings

Landscapes

  • Physics & Mathematics (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • General Physics & Mathematics (AREA)
  • Measurement Of Unknown Time Intervals (AREA)
  • Photometry And Measurement Of Optical Pulse Characteristics (AREA)
  • Testing Of Optical Devices Or Fibers (AREA)
  • Gyroscopes (AREA)
  • Investigating Or Analysing Materials By Optical Means (AREA)
  • Optical Radar Systems And Details Thereof (AREA)
  • Optical Communication System (AREA)
IL12722898A 1997-11-26 1998-11-24 Method for determining the phase difference of light waves propagated over two paths IL127228A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US08/979,162 US5995207A (en) 1997-11-26 1997-11-26 Method for determining the phase difference of light waves propagated over two paths

Publications (2)

Publication Number Publication Date
IL127228A0 IL127228A0 (en) 1999-09-22
IL127228A true IL127228A (en) 2002-03-10

Family

ID=25526749

Family Applications (1)

Application Number Title Priority Date Filing Date
IL12722898A IL127228A (en) 1997-11-26 1998-11-24 Method for determining the phase difference of light waves propagated over two paths

Country Status (7)

Country Link
US (1) US5995207A (de)
EP (1) EP0919795B1 (de)
KR (1) KR100581158B1 (de)
AU (1) AU735031B2 (de)
CA (1) CA2254251C (de)
IL (1) IL127228A (de)
NO (1) NO330324B1 (de)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
TW569083B (en) * 1999-02-04 2004-01-01 Asml Netherlands Bv Lithographic projection apparatus
US6600586B1 (en) * 1999-05-10 2003-07-29 Northrop Grumman Corporation Normalization method for acquiring interferometer phase shift from frequency division multiplexed fiber optic sensor arrays
US6122057A (en) * 1999-07-30 2000-09-19 Litton Systems, Inc. Four step discrete phase shift demodulation method for fiber optic sensor arrays
US6939434B2 (en) * 2000-08-11 2005-09-06 Applied Materials, Inc. Externally excited torroidal plasma source with magnetic control of ion distribution
US6646723B1 (en) * 2002-05-07 2003-11-11 The United States Of America As Represented By The Administrator Of The National Aeronautics And Space Administration High precision laser range sensor
US7327462B2 (en) * 2005-08-17 2008-02-05 Litton Systems, Inc. Method and apparatus for direct detection of signals from a differential delay heterodyne interferometric system
JP5352959B2 (ja) * 2007-03-16 2013-11-27 富士通株式会社 直接シーケンススペクトル拡散方式のレーダー、レーダーで使用される方法及びコンピュータプログラム
KR100969783B1 (ko) * 2008-04-28 2010-07-13 한국전자통신연구원 인체통신에서 인체의 위상 응답특성을 측정하기 위한시스템 및 방법

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5153676A (en) * 1983-04-26 1992-10-06 The Board Of Trustees Of The Leland Stanford Junior University Apparatus and method for reducing phase errors in an interferometer
SE447601B (sv) * 1985-04-04 1986-11-24 Ericsson Telefon Ab L M Fiberoptisk interferometer
GB2190185B (en) * 1986-05-09 1989-12-06 Gen Electric Plc An optical sensor system
US4775216A (en) * 1987-02-02 1988-10-04 Litton Systems, Inc. Fiber optic sensor array and method
JPH0198902A (ja) * 1987-10-12 1989-04-17 Res Dev Corp Of Japan 光波干渉測長装置
US5227857A (en) * 1991-04-24 1993-07-13 The United States Of America As Represented By The Secretary Of The Navy System for cancelling phase noise in an interferometric fiber optic sensor arrangement
US5283625A (en) * 1991-08-19 1994-02-01 Litton Systems, Inc. Interferometer phase modulation controller apparatus using ratios of two pairs of harmonic signals
US5452086A (en) * 1993-03-22 1995-09-19 Litton Systems, Inc. Interferometer amplitude modulation reduction circuit
JP3247602B2 (ja) * 1996-01-25 2002-01-21 沖電気工業株式会社 光ファイバセンサシステム
US5917597A (en) * 1998-02-04 1999-06-29 Litton Systems, Inc. Noise suppression apparatus and method for time division multiplexed fiber optic sensor arrays

Also Published As

Publication number Publication date
NO330324B1 (no) 2011-03-28
CA2254251C (en) 2001-04-24
KR100581158B1 (ko) 2006-10-04
EP0919795A3 (de) 2002-05-15
KR19990045591A (ko) 1999-06-25
NO985501D0 (no) 1998-11-25
NO985501L (no) 1999-05-27
AU735031B2 (en) 2001-06-28
EP0919795B1 (de) 2011-06-29
CA2254251A1 (en) 1999-05-26
EP0919795A2 (de) 1999-06-02
US5995207A (en) 1999-11-30
AU9408198A (en) 1999-06-17
IL127228A0 (en) 1999-09-22

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