GB8416306D0 - Optical detecting/measuring systems - Google Patents

Optical detecting/measuring systems

Info

Publication number
GB8416306D0
GB8416306D0 GB848416306A GB8416306A GB8416306D0 GB 8416306 D0 GB8416306 D0 GB 8416306D0 GB 848416306 A GB848416306 A GB 848416306A GB 8416306 A GB8416306 A GB 8416306A GB 8416306 D0 GB8416306 D0 GB 8416306D0
Authority
GB
United Kingdom
Prior art keywords
measuring systems
optical detecting
detecting
optical
measuring
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.)
Granted
Application number
GB848416306A
Other versions
GB2145514A (en
GB2145514B (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.)
Plessey Co Ltd
Original Assignee
Plessey Co Ltd
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 Plessey Co Ltd filed Critical Plessey Co Ltd
Publication of GB8416306D0 publication Critical patent/GB8416306D0/en
Publication of GB2145514A publication Critical patent/GB2145514A/en
Application granted granted Critical
Publication of GB2145514B publication Critical patent/GB2145514B/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01H—MEASUREMENT OF MECHANICAL VIBRATIONS OR ULTRASONIC, SONIC OR INFRASONIC WAVES
    • G01H9/00—Measuring mechanical vibrations or ultrasonic, sonic or infrasonic waves by using radiation-sensitive means, e.g. optical means
    • G01H9/004—Measuring mechanical vibrations or ultrasonic, sonic or infrasonic waves by using radiation-sensitive means, e.g. optical means using fibre optic sensors
    • 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
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R15/00—Details of measuring arrangements of the types provided for in groups G01R17/00 - G01R29/00, G01R33/00 - G01R33/26 or G01R35/00
    • G01R15/14—Adaptations providing voltage or current isolation, e.g. for high-voltage or high-current networks
    • G01R15/24—Adaptations providing voltage or current isolation, e.g. for high-voltage or high-current networks using light-modulating devices
    • G01R15/248—Adaptations providing voltage or current isolation, e.g. for high-voltage or high-current networks using light-modulating devices using a constant light source and electro-mechanically driven deflectors
    • 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
    • G01J2009/0226—Fibres
GB08416306A 1983-08-24 1984-06-27 Optical detecting and/or measuring systems Expired GB2145514B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB08322715A GB2147758B (en) 1983-08-24 1983-08-24 Optical detecting and/or measuring

Publications (3)

Publication Number Publication Date
GB8416306D0 true GB8416306D0 (en) 1984-08-01
GB2145514A GB2145514A (en) 1985-03-27
GB2145514B GB2145514B (en) 1986-12-17

Family

ID=10547769

Family Applications (2)

Application Number Title Priority Date Filing Date
GB08322715A Expired GB2147758B (en) 1983-08-24 1983-08-24 Optical detecting and/or measuring
GB08416306A Expired GB2145514B (en) 1983-08-24 1984-06-27 Optical detecting and/or measuring systems

Family Applications Before (1)

Application Number Title Priority Date Filing Date
GB08322715A Expired GB2147758B (en) 1983-08-24 1983-08-24 Optical detecting and/or measuring

Country Status (1)

Country Link
GB (2) GB2147758B (en)

Families Citing this family (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2166020B (en) * 1984-09-29 1988-05-18 Plessey Co Plc Otdr-uses multiple frequencies to detect distortions in an optical fibre
GB2182223A (en) * 1985-10-23 1987-05-07 Stc Plc Optical fibre reflectometer
US4717253A (en) * 1985-11-22 1988-01-05 Massachusetts Institute Of Technology Optical strain gauge
GB2189880B (en) * 1986-04-30 1989-12-28 Plessey Co Plc Optical sensor system
GB2192984B (en) * 1986-07-25 1990-07-18 Plessey Co Plc Optical sensing arrangements
US4725728A (en) * 1986-08-13 1988-02-16 The United States Of America As Represented By The Secretary Of The Navy Fiber optical time delay resonant oscillating strain gauge
US4974961A (en) * 1986-09-12 1990-12-04 Jackson David A Optical fibre measuring system
GB2199135B (en) * 1986-12-10 1990-11-07 Plessey Co Plc Improvements relating to optical sensing arrangements
GB2202046A (en) * 1987-03-11 1988-09-14 Plessey Co Plc Optical fibre sensor arrangement
GB2242267A (en) * 1989-02-10 1991-09-25 Plessey Co Plc Sonar detector
US5485296A (en) * 1989-07-29 1996-01-16 British Telecommunications Public Limited Company Monitor unit for monitoring an optical waveguide
GB8917488D0 (en) * 1989-07-31 1989-09-13 British Telecomm A monitor unit for monitoring an optical waveguide
GB9026587D0 (en) * 1990-12-06 1991-04-24 Marconi Gec Ltd Improvements relating to optical fibre coil assemblies
GB0113766D0 (en) * 2001-05-31 2003-02-26 Bae Systems Plc Improvements relating to optical delay lines
AU2015200314B2 (en) * 2009-05-27 2017-02-02 Silixa Limited Method and apparatus for optical sensing
CA3175447A1 (en) 2009-05-27 2010-12-02 Silixa Ltd Method and apparatus for optical sensing
WO2012023918A1 (en) 2010-08-19 2012-02-23 Halliburton Energy Services, Inc. Optical pressure sensor
CN102564642B (en) * 2012-02-21 2013-08-07 中国计量学院 Fully-distributed optical fiber sensor for optical fiber Raman frequency shifter fused with Raman amplification effect
CN107045207A (en) * 2017-06-07 2017-08-15 中国科学院半导体研究所 Train of pulse produces the structure controlled with time domain pattern

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2460582A1 (en) * 1979-06-29 1981-01-23 Thomson Csf OPTICAL FIBER HYDROPHONE MONOMODE OPERATING BY ELASTOOPTIC EFFECT
JPS58182524A (en) * 1982-04-20 1983-10-25 Sumitomo Electric Ind Ltd System for detecting change in light frequency

Also Published As

Publication number Publication date
GB2147758B (en) 1987-08-05
GB2145514A (en) 1985-03-27
GB2147758A (en) 1985-05-15
GB2145514B (en) 1986-12-17

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Legal Events

Date Code Title Description
732 Registration of transactions, instruments or events in the register (sect. 32/1977)
PCNP Patent ceased through non-payment of renewal fee

Effective date: 19930627