GB1243359A – Detection of small displacements
– Google Patents
GB1243359A – Detection of small displacements
– Google Patents
Detection of small displacements
Info
Publication number
GB1243359A
GB1243359A
GB5316468A
GB5316468A
GB1243359A
GB 1243359 A
GB1243359 A
GB 1243359A
GB 5316468 A
GB5316468 A
GB 5316468A
GB 5316468 A
GB5316468 A
GB 5316468A
GB 1243359 A
GB1243359 A
GB 1243359A
Authority
GB
United Kingdom
Prior art keywords
mirror
interferometer
signal
high frequency
nov
Prior art date
1967-11-10
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
GB5316468A
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.)
Alcatel Lucent SAS
Original Assignee
Compagnie Generale dElectricite SA
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.)
1967-11-10
Filing date
1968-11-08
Publication date
1971-08-18
1968-11-08
Application filed by Compagnie Generale dElectricite SA
filed
Critical
Compagnie Generale dElectricite SA
1971-08-18
Publication of GB1243359A
publication
Critical
patent/GB1243359A/en
Status
Expired
legal-status
Critical
Current
Links
Espacenet
Global Dossier
Discuss
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
Abstract
1,243,359. Light modulators. COMPAGNIE GENERAL D’ELECTRICITE. 8 Nov., 1968 [10 Nov., 1967], No. 53164/68. Heading H4F. [Also in Divisions G1 and G2] Small displacements are detected by coupling them to one mirror of a Fabry-Perot interferometer, detecting the intensity of light passing through or reflected from the interferometer, feeding back a signal to a transducer tending to keep the variations in mirror spacing less than #/4 and using the fed back signal as an indication of the displacements. The interferometer 1, which is illuminated by a He-Ne laser 4, comprises mirrors 8 and 9 coupled to a piezoelectric ceramic or magnetostrictive cylinder 16 rigidly and by a diaphragm 11 respectively. The light intensity emerging at 10
GB5316468A
1967-11-10
1968-11-08
Detection of small displacements
Expired
GB1243359A
(en)
Applications Claiming Priority (1)
Application Number
Priority Date
Filing Date
Title
FR127817
1967-11-10
Publications (1)
Publication Number
Publication Date
GB1243359A
true
GB1243359A
(en)
1971-08-18
Family
ID=8641565
Family Applications (1)
Application Number
Title
Priority Date
Filing Date
GB5316468A
Expired
GB1243359A
(en)
1967-11-10
1968-11-08
Detection of small displacements
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 (4)
* Cited by examiner, † Cited by third party
Publication number
Priority date
Publication date
Assignee
Title
FR2538195A1
(en)
*
1982-12-16
1984-06-22
Int Standard Electric Corp
Method and system of optical transmission.
WO2007100957A1
(en)
*
2006-03-02
2007-09-07
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
CN102833661A
(en)
*
2012-08-15
2012-12-19
温州泛波激光有限公司
Laser microphone
Families Citing this family (7)
* 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
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
1967
1967-11-10
FR
FR127817A
patent/FR1555697A/fr
not_active
Expired
1968
1968-10-24
BE
BE722797D
patent/BE722797A/xx
unknown
1968-11-08
NL
NL6815932A
patent/NL6815932A/xx
unknown
1968-11-08
DE
DE19681807876
patent/DE1807876A1/en
active
Pending
1968-11-08
GB
GB5316468A
patent/GB1243359A/en
not_active
Expired
Cited By (5)
* Cited by examiner, † Cited by third party
Publication number
Priority date
Publication date
Assignee
Title
FR2538195A1
(en)
*
1982-12-16
1984-06-22
Int Standard Electric Corp
Method and system of optical transmission.
WO2007100957A1
(en)
*
2006-03-02
2007-09-07
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
CN102833661A
(en)
*
2012-08-15
2012-12-19
温州泛波激光有限公司
Laser microphone
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
NL6815932A
(en)
1969-05-13
DE1807876A1
(en)
1969-07-31
FR1555697A
(en)
1969-01-31
BE722797A
(en)
1969-04-24
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