GB1463537A - Method and apparatus for investigation of small displacements of a solid body by means of coherent light - Google Patents

Method and apparatus for investigation of small displacements of a solid body by means of coherent light

Info

Publication number
GB1463537A
GB1463537A GB1760574A GB1760574A GB1463537A GB 1463537 A GB1463537 A GB 1463537A GB 1760574 A GB1760574 A GB 1760574A GB 1760574 A GB1760574 A GB 1760574A GB 1463537 A GB1463537 A GB 1463537A
Authority
GB
United Kingdom
Prior art keywords
splitter
coherent light
diaphragm
photo
reflected
Prior art date
Legal status (The legal status 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 status listed.)
Expired
Application number
GB1760574A
Other languages
English (en)
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Office National dEtudes et de Recherches Aerospatiales ONERA
Original Assignee
Office National dEtudes et de Recherches Aerospatiales ONERA
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 Office National dEtudes et de Recherches Aerospatiales ONERA filed Critical Office National dEtudes et de Recherches Aerospatiales ONERA
Publication of GB1463537A publication Critical patent/GB1463537A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
    • G02B27/48—Laser speckle optics
    • 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
    • G01B9/02055—Reduction or prevention of errors; Testing; Calibration
    • G01B9/02062—Active error reduction, i.e. varying with time
    • G01B9/02067—Active error reduction, i.e. varying with time by electronic control systems, i.e. using feedback acting on optics or light
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
    • G01B2290/00—Aspects of interferometers not specifically covered by any group under G01B9/02
    • G01B2290/40—Non-mechanical variable delay line
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
    • G01B2290/00—Aspects of interferometers not specifically covered by any group under G01B9/02
    • G01B2290/45—Multiple detectors for detecting interferometer signals

Landscapes

  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Automation & Control Theory (AREA)
  • Investigating Or Analysing Materials By Optical Means (AREA)
  • Measurement Of Mechanical Vibrations Or Ultrasonic Waves (AREA)
  • Length Measuring Devices By Optical Means (AREA)
GB1760574A 1973-05-23 1974-04-22 Method and apparatus for investigation of small displacements of a solid body by means of coherent light Expired GB1463537A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7318751A FR2230969B1 (enrdf_load_stackoverflow) 1973-05-23 1973-05-23

Publications (1)

Publication Number Publication Date
GB1463537A true GB1463537A (en) 1977-02-02

Family

ID=9119850

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1760574A Expired GB1463537A (en) 1973-05-23 1974-04-22 Method and apparatus for investigation of small displacements of a solid body by means of coherent light

Country Status (3)

Country Link
DE (1) DE2420732C3 (enrdf_load_stackoverflow)
FR (1) FR2230969B1 (enrdf_load_stackoverflow)
GB (1) GB1463537A (enrdf_load_stackoverflow)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3029776C2 (de) * 1980-08-06 1983-04-07 Krautkrämer, GmbH, 5000 Köln Verfahren zum berührungslosen Empfang von Ultraschallwellen
GB8522820D0 (en) * 1985-09-16 1985-10-23 Montgomery P C Interferometric measurement
DE4427692A1 (de) * 1994-08-04 1996-02-08 Bayerische Motoren Werke Ag Verfahren zum Bestimmen des Schwingungsverhaltens eines Körpers

Also Published As

Publication number Publication date
FR2230969A1 (enrdf_load_stackoverflow) 1974-12-20
DE2420732A1 (de) 1974-12-19
DE2420732B2 (de) 1978-11-02
DE2420732C3 (de) 1979-07-12
FR2230969B1 (enrdf_load_stackoverflow) 1976-04-23

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Legal Events

Date Code Title Description
PS Patent sealed
PCNP Patent ceased through non-payment of renewal fee