JPS5724863A - Modulation measuring method of and apparatus for intensity of light - Google Patents

Modulation measuring method of and apparatus for intensity of light

Info

Publication number
JPS5724863A
JPS5724863A JP10027380A JP10027380A JPS5724863A JP S5724863 A JPS5724863 A JP S5724863A JP 10027380 A JP10027380 A JP 10027380A JP 10027380 A JP10027380 A JP 10027380A JP S5724863 A JPS5724863 A JP S5724863A
Authority
JP
Japan
Prior art keywords
light
intensity
modulated
wavelength
optical path
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
JP10027380A
Other languages
Japanese (ja)
Inventor
Fumihiko Shibano
Kazumi Furukawa
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.)
Iwatsu Electric Co Ltd
Original Assignee
Iwatsu Electric 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 Iwatsu Electric Co Ltd filed Critical Iwatsu Electric Co Ltd
Priority to JP10027380A priority Critical patent/JPS5724863A/en
Publication of JPS5724863A publication Critical patent/JPS5724863A/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
    • G01R15/241—Adaptations providing voltage or current isolation, e.g. for high-voltage or high-current networks using light-modulating devices using electro-optical modulators, e.g. electro-absorption
    • G01R15/242—Adaptations providing voltage or current isolation, e.g. for high-voltage or high-current networks using light-modulating devices using electro-optical modulators, e.g. electro-absorption based on the Pockels effect, i.e. linear electro-optic effect

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Measuring Magnetic Variables (AREA)
  • Measuring Instrument Details And Bridges, And Automatic Balancing Devices (AREA)

Abstract

PURPOSE:To achieve a highly accurate measurement with relatively simple manner by detecting the intensity of two lights varied in the wavelength separetely with the integration of a light path through modulation of the first light with the quantity to be measured after it is separated with the generation of the two lights. CONSTITUTION:An optical path of first light 23 and second light 24 enters a light modulation section 27 through a first light integration device 25. The incident light 28 is sent to a light separation filter 44 and the light 23 moves straight while the light 24 is reflected and changes the optical path thereby by 90 deg.. the light 23 turns to a modulated light 23a through a modulation element containing a Pockels crystal 32. On the other hand, the light 24 is introduced to a light integrating interference film filter 47 to coincide the optical path of the modulated light 23a. The modulated light 23a and the light 24 are separated again by a second separator 36 via a condenser 48 or the like and reach light detectors 39 and 40 which detects the intensity of the modulated light 23a and the light 24 separately. Only affected by the wavelength of the light 23, the sensitivity of the detector will not lower despite any access thereof to the wavelength of the light 24. This enables a highly accurate measurement with relative simplicity.
JP10027380A 1980-07-22 1980-07-22 Modulation measuring method of and apparatus for intensity of light Pending JPS5724863A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP10027380A JPS5724863A (en) 1980-07-22 1980-07-22 Modulation measuring method of and apparatus for intensity of light

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP10027380A JPS5724863A (en) 1980-07-22 1980-07-22 Modulation measuring method of and apparatus for intensity of light

Publications (1)

Publication Number Publication Date
JPS5724863A true JPS5724863A (en) 1982-02-09

Family

ID=14269591

Family Applications (1)

Application Number Title Priority Date Filing Date
JP10027380A Pending JPS5724863A (en) 1980-07-22 1980-07-22 Modulation measuring method of and apparatus for intensity of light

Country Status (1)

Country Link
JP (1) JPS5724863A (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6126875A (en) * 1984-07-17 1986-02-06 Toshiba Corp Measuring device for magnetic field
EP0175358A2 (en) * 1984-09-18 1986-03-26 Mitsubishi Denki Kabushiki Kaisha Optical sensing equipment
JPS62126356A (en) * 1985-11-27 1987-06-08 Hitachi Ltd Optical transformer
JPH0572307A (en) * 1991-09-18 1993-03-26 Ngk Insulators Ltd Magnetic field measuring device
WO1995002194A1 (en) * 1993-07-07 1995-01-19 Tokin Corporation Electric field sensor

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5443780A (en) * 1977-09-14 1979-04-06 Toshiba Corp Photometric apparatus using optical fiber

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5443780A (en) * 1977-09-14 1979-04-06 Toshiba Corp Photometric apparatus using optical fiber

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6126875A (en) * 1984-07-17 1986-02-06 Toshiba Corp Measuring device for magnetic field
EP0175358A2 (en) * 1984-09-18 1986-03-26 Mitsubishi Denki Kabushiki Kaisha Optical sensing equipment
JPS62126356A (en) * 1985-11-27 1987-06-08 Hitachi Ltd Optical transformer
JPH0572307A (en) * 1991-09-18 1993-03-26 Ngk Insulators Ltd Magnetic field measuring device
WO1995002194A1 (en) * 1993-07-07 1995-01-19 Tokin Corporation Electric field sensor
US5781003A (en) * 1993-07-07 1998-07-14 Tokin Corporation Electric field sensor

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