BE722797A - - Google Patents

Info

Publication number
BE722797A
BE722797A BE722797DA BE722797A BE 722797 A BE722797 A BE 722797A BE 722797D A BE722797D A BE 722797DA BE 722797 A BE722797 A BE 722797A
Authority
BE
Belgium
Application number
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
Publication of BE722797A publication Critical patent/BE722797A/xx

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)
BE722797D 1967-11-10 1968-10-24 BE722797A (en)

Applications Claiming Priority (1)

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

Publications (1)

Publication Number Publication Date
BE722797A true BE722797A (en) 1969-04-24

Family

ID=8641565

Family Applications (1)

Application Number Title Priority Date Filing Date
BE722797D BE722797A (en) 1967-11-10 1968-10-24

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)

Families Citing this family (11)

* 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
FR2640456A1 (en) * 1988-12-13 1990-06-15 Science Tec MICROPHONE WITH INTERFEROMETRIC SOUND PRESSURE DETECTION
DE4125485C2 (en) * 1991-08-01 1994-05-19 Deutsche Aerospace Method and arrangement for measuring the smallest deflections
US7355723B2 (en) * 2006-03-02 2008-04-08 Symphony Acoustics, Inc. Apparatus comprising a high-signal-to-noise displacement sensor and method therefore
US7583390B2 (en) 2006-03-02 2009-09-01 Symphony Acoustics, Inc. Accelerometer comprising an optically resonant cavity
CN102833661B (en) * 2012-08-15 2016-08-03 温州泛波激光有限公司 A kind of laser microphone

Also Published As

Publication number Publication date
FR1555697A (en) 1969-01-31
DE1807876A1 (en) 1969-07-31
NL6815932A (en) 1969-05-13
GB1243359A (en) 1971-08-18

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