GB1524034A - Magnetooptical transducers - Google Patents
Magnetooptical transducersInfo
- 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
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.
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)
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 |
-
1975
- 1975-08-21 GB GB3469975A patent/GB1524034A/en not_active Expired
- 1975-08-22 CH CH1089275A patent/CH591085A5/xx not_active IP Right Cessation
- 1975-09-04 JP JP50107525A patent/JPS5153862A/en active Pending
Also Published As
Publication number | Publication date |
---|---|
CH591085A5 (en) | 1977-09-15 |
DE2442494B2 (en) | 1976-07-01 |
JPS5153862A (en) | 1976-05-12 |
DE2442494A1 (en) | 1976-04-01 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PS | Patent sealed | ||
PCNP | Patent ceased through non-payment of renewal fee |