GB1353543A - Electro-optical apparatus for rotating the plane of polarisation of a plane polarised light wave - Google Patents

Electro-optical apparatus for rotating the plane of polarisation of a plane polarised light wave

Info

Publication number
GB1353543A
GB1353543A GB1916371*[A GB1916371A GB1353543A GB 1353543 A GB1353543 A GB 1353543A GB 1916371 A GB1916371 A GB 1916371A GB 1353543 A GB1353543 A GB 1353543A
Authority
GB
United Kingdom
Prior art keywords
plane
detector
cell
polarization
output
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
GB1916371*[A
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.)
BBC Brown Boveri AG Switzerland
BBC Brown Boveri France SA
Original Assignee
BBC Brown Boveri AG Switzerland
BBC Brown Boveri France 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.)
Filing date
Publication date
Application filed by BBC Brown Boveri AG Switzerland, BBC Brown Boveri France SA filed Critical BBC Brown Boveri AG Switzerland
Publication of GB1353543A publication Critical patent/GB1353543A/en
Expired legal-status Critical Current

Links

Classifications

    • 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
    • G01R15/247—Details of the circuitry or construction of devices covered by G01R15/241 - G01R15/246
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
    • G01R19/0092—Arrangements for measuring currents or voltages or for indicating presence or sign thereof measuring current only

Abstract

1353543 Automatic control of polarization BBC BROWN BOVERI & CO Ltd 7 June 1971 [9 June 1970] 19163/71 Heading G3R [Also in Division G1] #/4 plates 1, 3 are disposed either side of a Pockels or Kerr electro-optic cell 2 and with their axis at 45 degrees to those of the cell so that light incident on one #/4 plate leaves the other plate with a plane of polarization rotated by an amount controlled by the potential applied to the electrooptic cell. As described, the arrangement is used to nullify variations in the plane of polarization of an incident beam derived from a Faraday effect element 14 controlled by the current in a high voltage conductor 15. An A. C. voltage is passed to a differential amplifier 23 controlling cell 2 and to a phase detector 21. After passing an analyzer 16, the light beam falls on a photo-detector 20 supplying the other input to detector 21. The output of detector 21 is amplified 22, measured 24 and passed to the other input of amplifier 23. When the plane of polarization of the output light beam has a predetermined orientation with respect to analyzer 16, the output of detector 20 will comprise only the second harmonic of the A.C. frequency supplied to cell 2. Detector 21, preferably tuned to the A.C. fundamental, is therefore able to supply a signal indicative of the 'magnitude and sign of the deviation of the output plane of polarization from the predetermined plane, and the measurement 24 is thus a function (linear or square law, depending on whether a Pockels or Kerr cell is used) of the current in conductor 15. Reference has been directed by the Comptroller to Specification 1248752.
GB1916371*[A 1970-06-09 1971-07-07 Electro-optical apparatus for rotating the plane of polarisation of a plane polarised light wave Expired GB1353543A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH861670A CH516806A (en) 1970-06-09 1970-06-09 Electro-optical device for rotating the plane of polarization of a linearly polarized light wave

Publications (1)

Publication Number Publication Date
GB1353543A true GB1353543A (en) 1974-05-22

Family

ID=4342671

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1916371*[A Expired GB1353543A (en) 1970-06-09 1971-07-07 Electro-optical apparatus for rotating the plane of polarisation of a plane polarised light wave

Country Status (6)

Country Link
CA (1) CA941455A (en)
CH (1) CH516806A (en)
DE (1) DE2043517A1 (en)
FR (1) FR2095973A5 (en)
GB (1) GB1353543A (en)
SE (1) SE365872B (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1284425A2 (en) * 2001-08-17 2003-02-19 Siemens Aktiengesellschaft Procedure and device for interference compensation of an optical sensor
EP1921458A3 (en) * 2003-07-28 2010-09-01 Nippon Telegraph And Telephone Corporation Electric field sensor and adjustment method thereof
EP1650573B1 (en) * 2000-03-01 2011-04-20 inTEST Corporation Counter balanced vertical docking motion in a driven vertical test head manipulator
EP2479581A1 (en) 2011-01-21 2012-07-25 PowerSense A/S An AC or DC power transmission system and a method of measuring a voltage
US8692539B2 (en) 2006-11-30 2014-04-08 Powersense A/S Faraday effect current sensor

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2758723A1 (en) * 1977-12-29 1979-07-12 Siemens Ag METHOD FOR MAGNETO-OPTICAL CURRENT MEASUREMENT

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1650573B1 (en) * 2000-03-01 2011-04-20 inTEST Corporation Counter balanced vertical docking motion in a driven vertical test head manipulator
EP1284425A2 (en) * 2001-08-17 2003-02-19 Siemens Aktiengesellschaft Procedure and device for interference compensation of an optical sensor
EP1284425A3 (en) * 2001-08-17 2004-07-14 Siemens Aktiengesellschaft Procedure and device for interference compensation of an optical sensor
US7064315B2 (en) 2001-08-17 2006-06-20 Siemens Aktiengesellschaft Method and device for compensating for interfering variables in an optical sensor
EP1921458A3 (en) * 2003-07-28 2010-09-01 Nippon Telegraph And Telephone Corporation Electric field sensor and adjustment method thereof
US7859666B2 (en) 2003-07-28 2010-12-28 Nippon Telegraph And Telephone Corporation Electric field sensor
US8692539B2 (en) 2006-11-30 2014-04-08 Powersense A/S Faraday effect current sensor
EP2479581A1 (en) 2011-01-21 2012-07-25 PowerSense A/S An AC or DC power transmission system and a method of measuring a voltage
WO2012098099A1 (en) 2011-01-21 2012-07-26 Powersense A/S An ac or dc power transmission system and a method of measuring a voltage
US9383390B2 (en) 2011-01-21 2016-07-05 Powersense A/S AC or DC power transmission system and a method of measuring a voltage

Also Published As

Publication number Publication date
CA941455A (en) 1974-02-05
CH516806A (en) 1971-12-15
DE2043517A1 (en) 1971-12-23
FR2095973A5 (en) 1972-02-11
SE365872B (en) 1974-04-01

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Legal Events

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