FR1555697A - - Google Patents

Info

Publication number
FR1555697A
FR1555697A FR127817A FR1555697DA FR1555697A FR 1555697 A FR1555697 A FR 1555697A FR 127817 A FR127817 A FR 127817A FR 1555697D A FR1555697D A FR 1555697DA FR 1555697 A FR1555697 A FR 1555697A
Authority
FR
France
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
FR127817A
Other languages
French (fr)
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 filed Critical
Application granted granted Critical
Publication of FR1555697A publication Critical patent/FR1555697A/fr
Expired legal-status Critical Current

Links

Classifications

    • 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
    • G01B9/02075—Reduction or prevention of errors; Testing; Calibration of particular errors
    • G01B9/02078—Caused by ambiguity
    • 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
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R23/00—Transducers other than those covered by groups H04R9/00 - H04R21/00
    • H04R23/008—Transducers other than those covered by groups H04R9/00 - H04R21/00 using optical signals for detecting or generating sound
    • 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
    • G01B2290/25—Fabry-Perot in interferometer, e.g. etalon, cavity

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Automation & Control Theory (AREA)
  • Optics & Photonics (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Mechanical Light Control Or Optical Switches (AREA)
  • Instruments For Measurement Of Length By Optical Means (AREA)
  • Measurement Of Mechanical Vibrations Or Ultrasonic Waves (AREA)
  • Lasers (AREA)
FR127817A 1967-11-10 1967-11-10 Expired FR1555697A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR127817 1967-11-10

Publications (1)

Publication Number Publication Date
FR1555697A true FR1555697A (en) 1969-01-31

Family

ID=8641565

Family Applications (1)

Application Number Title Priority Date Filing Date
FR127817A Expired FR1555697A (en) 1967-11-10 1967-11-10

Country Status (5)

Country Link
BE (1) BE722797A (en)
DE (1) DE1807876A1 (en)
FR (1) FR1555697A (en)
GB (1) GB1243359A (en)
NL (1) NL6815932A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2640456A1 (en) * 1988-12-13 1990-06-15 Science Tec MICROPHONE WITH INTERFEROMETRIC SOUND PRESSURE DETECTION

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3116346A1 (en) * 1980-05-01 1982-03-04 National Research Development Corp., London DEVICE FOR MEASURING THE SOUND VOLUME OR OF VOLUME FLOW, IN PARTICULAR IN THE LOW AREA OF NANOLITERS PER SECOND
DE3142164A1 (en) * 1980-10-27 1982-06-16 Rosemount Engineering Co. Ltd., Bognor Regis, Sussex DEVICE FOR MEASURING PRESSURE DIFFERENCES
FR2538195B1 (en) * 1982-12-16 1986-10-17 Int Standard Electric Corp OPTICAL TRANSMISSION METHOD AND SYSTEM
JPS61235731A (en) * 1985-04-11 1986-10-21 Sharp Corp Pressure sensing element
JPS6230921A (en) * 1985-07-31 1987-02-09 Sharp Corp Optical sensor
DE3709253A1 (en) * 1987-03-20 1988-09-29 Fraunhofer Ges Forschung Fabry Perot sensor
DE4125485C2 (en) * 1991-08-01 1994-05-19 Deutsche Aerospace Method and arrangement for measuring the smallest deflections
US7583390B2 (en) 2006-03-02 2009-09-01 Symphony Acoustics, Inc. Accelerometer comprising an optically resonant cavity
US7355723B2 (en) * 2006-03-02 2008-04-08 Symphony Acoustics, Inc. Apparatus comprising a high-signal-to-noise displacement sensor and method therefore
CN102833661B (en) * 2012-08-15 2016-08-03 温州泛波激光有限公司 A kind of laser microphone

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2640456A1 (en) * 1988-12-13 1990-06-15 Science Tec MICROPHONE WITH INTERFEROMETRIC SOUND PRESSURE DETECTION
WO1990007250A1 (en) * 1988-12-13 1990-06-28 Science & Tec Microphone with interferometric detection of acoustic pressure

Also Published As

Publication number Publication date
NL6815932A (en) 1969-05-13
DE1807876A1 (en) 1969-07-31
BE722797A (en) 1969-04-24
GB1243359A (en) 1971-08-18

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Legal Events

Date Code Title Description
ST Notification of lapse