JPS57184979A - Photo measuring device - Google Patents

Photo measuring device

Info

Publication number
JPS57184979A
JPS57184979A JP56071806A JP7180681A JPS57184979A JP S57184979 A JPS57184979 A JP S57184979A JP 56071806 A JP56071806 A JP 56071806A JP 7180681 A JP7180681 A JP 7180681A JP S57184979 A JPS57184979 A JP S57184979A
Authority
JP
Japan
Prior art keywords
light
photo
temperature
wavelength
supplied
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.)
Pending
Application number
JP56071806A
Other languages
Japanese (ja)
Inventor
Kazuo Hisama
Shuichi Tai
Toshio Aranishi
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.)
Mitsubishi Electric Corp
Original Assignee
Mitsubishi Electric Corp
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 Mitsubishi Electric Corp filed Critical Mitsubishi Electric Corp
Priority to JP56071806A priority Critical patent/JPS57184979A/en
Publication of JPS57184979A publication Critical patent/JPS57184979A/en
Pending 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Measuring Magnetic Variables (AREA)
  • Measuring Instrument Details And Bridges, And Automatic Balancing Devices (AREA)
  • Measurement Of Current Or Voltage (AREA)
  • Investigating Or Analysing Materials By Optical Means (AREA)

Abstract

PURPOSE:To perform a photo measurement being excellent in a temperature property, by a method wherein two types of lights being different in wavelength, are used, a physical volume is measured by one wavelength light, and temperature by the other wavelength light to correct a physical volume measuring signal by the use of a temperature measuring signal. CONSTITUTION:Light emitting devices 9 and 10 generate two lights having light wavelengths lambda1 and lambda2, respectively. A light composing device 11 composes luminous outputs fed from the light emitting devices 9 and 10 through optical fibers 2a to feed it to a photo-magnetic field sensor 3. The supplied light is collected by a micro lens 4a and is supplied to a polarizer 5 for the rectilinear polarization. The polarized light is supplied to a detector 7 through a photo Faraday element 6 and a photo-temperature detecting element 12, and an amount of light, having the wavelength lambda1, absorbed by the element 12 varies with temperature. The output of the sensor 3 is applied to light detectors 14 and 15 via a photo devider 13 mounted to the optical fiber 2b, and the light detectors 14 and 15 fetch only the wavelengths lambda1 and lambda2, respectively, to convert them into an electric signal. The outputs of the light detectors 14 and 15 are computed and processed by a signal processing circuit 16 to supply them to an output terminal 17.
JP56071806A 1981-05-09 1981-05-09 Photo measuring device Pending JPS57184979A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP56071806A JPS57184979A (en) 1981-05-09 1981-05-09 Photo measuring device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP56071806A JPS57184979A (en) 1981-05-09 1981-05-09 Photo measuring device

Publications (1)

Publication Number Publication Date
JPS57184979A true JPS57184979A (en) 1982-11-13

Family

ID=13471174

Family Applications (1)

Application Number Title Priority Date Filing Date
JP56071806A Pending JPS57184979A (en) 1981-05-09 1981-05-09 Photo measuring device

Country Status (1)

Country Link
JP (1) JPS57184979A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0572307A (en) * 1991-09-18 1993-03-26 Ngk Insulators Ltd Magnetic field measuring device

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5629174A (en) * 1979-08-17 1981-03-23 Matsushita Electric Ind Co Ltd Electric current measuring device

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5629174A (en) * 1979-08-17 1981-03-23 Matsushita Electric Ind Co Ltd Electric current measuring device

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0572307A (en) * 1991-09-18 1993-03-26 Ngk Insulators Ltd Magnetic field measuring device

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