GB1524034A - Magnetooptical transducers - Google Patents

Magnetooptical transducers

Info

Publication number
GB1524034A
GB1524034A GB3469975A GB3469975A GB1524034A GB 1524034 A GB1524034 A GB 1524034A GB 3469975 A GB3469975 A GB 3469975A GB 3469975 A GB3469975 A GB 3469975A GB 1524034 A GB1524034 A GB 1524034A
Authority
GB
United Kingdom
Prior art keywords
beams
current
measured
polarization
planes
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
GB3469975A
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.)
Siemens AG
Original Assignee
Siemens AG
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
Priority claimed from DE19742442494 external-priority patent/DE2442494C3/en
Application filed by Siemens AG filed Critical Siemens AG
Publication of GB1524034A publication Critical patent/GB1524034A/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
    • G01R15/245—Adaptations providing voltage or current isolation, e.g. for high-voltage or high-current networks using light-modulating devices using magneto-optical modulators, e.g. based on the Faraday or Cotton-Mouton effect
    • G01R15/246—Adaptations providing voltage or current isolation, e.g. for high-voltage or high-current networks using light-modulating devices using magneto-optical modulators, e.g. based on the Faraday or Cotton-Mouton effect based on the Faraday, i.e. linear magneto-optic, effect
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R33/00—Arrangements or instruments for measuring magnetic variables
    • G01R33/02—Measuring direction or magnitude of magnetic fields or magnetic flux
    • G01R33/032—Measuring direction or magnitude of magnetic fields or magnetic flux using magneto-optic devices, e.g. Faraday or Cotton-Mouton effect
    • G01R33/0322—Measuring direction or magnitude of magnetic fields or magnetic flux using magneto-optic devices, e.g. Faraday or Cotton-Mouton effect using the Faraday or Voigt effect

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Condensed Matter Physics & Semiconductors (AREA)
  • Measuring Instrument Details And Bridges, And Automatic Balancing Devices (AREA)
  • Transformers For Measuring Instruments (AREA)

Abstract

1524034 Measuring current SIEMENS AG 21 Aug 1975 [5 Sept 1974] 34699/75 Heading G1U Current, for example in a high potential line, is measured by an arrangement in which (1) two coherent plane polarized beams of light from two mirrors 11, 12 are amplitude modulated 110, 120, in quadrature, i.e. their intensities I c and I 2 respectively are given by- and (2) the planes of polarization of the two beams are then each rotated 111, 121, by 45 degrees but in opposite directions, (3) the resulting beams are both passed through a Faraday rotator, 130, to a winding 131 on which the current to be measured is passed, thus rotating the planes of polarization of the two beams by an angle #, say, (4) the two beams are resolved 132 into two perpendicular directions of polarization parallel to the two directions which the two beams had before entering the rotator, (5) the emerging beams are converted 1101, 1201, into electric signals and differenced, 1110, and (6) the phase of the resulting difference signal is determined 1111, this phase being a measure of the current to be measured.
GB3469975A 1974-09-05 1975-08-21 Magnetooptical transducers Expired GB1524034A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19742442494 DE2442494C3 (en) 1974-09-05 Magneto-optical transducer

Publications (1)

Publication Number Publication Date
GB1524034A true GB1524034A (en) 1978-09-06

Family

ID=5924936

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3469975A Expired GB1524034A (en) 1974-09-05 1975-08-21 Magnetooptical transducers

Country Status (3)

Country Link
JP (1) JPS5153862A (en)
CH (1) CH591085A5 (en)
GB (1) GB1524034A (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3923803A1 (en) * 1989-07-19 1991-01-31 Messwandler Bau Ag FIBER OPTICAL ARRANGEMENT FOR MEASURING THE STRENGTH OF AN ELECTRIC CURRENT

Also Published As

Publication number Publication date
DE2442494B2 (en) 1976-07-01
DE2442494A1 (en) 1976-04-01
JPS5153862A (en) 1976-05-12
CH591085A5 (en) 1977-09-15

Similar Documents

Publication Publication Date Title
US3675125A (en) Optical wattmeter
US5056919A (en) Device for measuring a phase shift which is not reciprocal produced in a ring interferometer
GB1472894A (en) Interferometric methods and apparatus for measuring distance to a surface
GB1276798A (en) Method of and apparatus for measuring the plane of polarisation of polarized light
US3621390A (en) Arrangement for measuring a time variable magnetic field using the faraday effect
CA2160472A1 (en) Optical method of measuring an alternating electrical current, including temperature compensation, and a device for carrying out the method
JPH0224349B2 (en)
GB1387078A (en) Phase detector
GB1345045A (en) Universal plarimeter
US3708747A (en) Optical current transformer
GB1333152A (en) Electro-optical measuring apparatus
US3134840A (en) Optical phase measuring apparatus
GB1524034A (en) Magnetooptical transducers
US3503012A (en) Optical differential interferometer discriminator for fm to am conversion
GB1333569A (en) Photoelectric polarisation analyser
GB1308957A (en) Methods and apparatus for determining the distance of an object
GB861153A (en) Measurement of displacement by electrical means
Tatam et al. Faraday effect magnetometry utilizing high Verdet constant glass
GB928564A (en) Improvements in or relating to devices for determining the displacement of an objectrelative to another
GB1295068A (en)
GB2184253A (en) Optical state-of-polarisation modulator
GB1285277A (en) Apparatus for measuring the linear displacement of a moving object
JP2001526770A (en) Electro-optic voltage sensor
Peng et al. A new heterodyne fiber-optic gyroscope using electrooptic frequency shifter
GB1210273A (en) Optical dichroism measuring apparatus & method

Legal Events

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