JPS55158525A - Optical sensor for detecting temperature - Google Patents

Optical sensor for detecting temperature

Info

Publication number
JPS55158525A
JPS55158525A JP6639079A JP6639079A JPS55158525A JP S55158525 A JPS55158525 A JP S55158525A JP 6639079 A JP6639079 A JP 6639079A JP 6639079 A JP6639079 A JP 6639079A JP S55158525 A JPS55158525 A JP S55158525A
Authority
JP
Japan
Prior art keywords
polarizer plate
polarization
double refraction
plate
refraction crystal
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
JP6639079A
Other languages
Japanese (ja)
Inventor
Akiya Goto
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.)
Toshiba Corp
Original Assignee
Toshiba Corp
Tokyo Shibaura 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 Toshiba Corp, Tokyo Shibaura Electric Co Ltd filed Critical Toshiba Corp
Priority to JP6639079A priority Critical patent/JPS55158525A/en
Priority to US06/152,163 priority patent/US4367040A/en
Priority to DE3020454A priority patent/DE3020454C2/en
Publication of JPS55158525A publication Critical patent/JPS55158525A/en
Pending legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
    • G01J5/00—Radiation pyrometry, e.g. infrared or optical thermometry
    • G01J5/58—Radiation pyrometry, e.g. infrared or optical thermometry using absorption; using extinction effect
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
    • G01K11/00—Measuring temperature based upon physical or chemical changes not covered by groups G01K3/00, G01K5/00, G01K7/00 or G01K9/00
    • G01K11/32—Measuring temperature based upon physical or chemical changes not covered by groups G01K3/00, G01K5/00, G01K7/00 or G01K9/00 using changes in transmittance, scattering or luminescence in optical fibres
    • G01K11/3206—Measuring temperature based upon physical or chemical changes not covered by groups G01K3/00, G01K5/00, G01K7/00 or G01K9/00 using changes in transmittance, scattering or luminescence in optical fibres at discrete locations in the fibre, e.g. using Bragg scattering
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/24—Coupling light guides
    • G02B6/26—Optical coupling means
    • G02B6/27—Optical coupling means with polarisation selective and adjusting means
    • G02B6/2706—Optical coupling means with polarisation selective and adjusting means as bulk elements, i.e. free space arrangements external to a light guide, e.g. polarising beam splitters
    • G02B6/2713—Optical coupling means with polarisation selective and adjusting means as bulk elements, i.e. free space arrangements external to a light guide, e.g. polarising beam splitters cascade of polarisation selective or adjusting operations

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Measuring Temperature Or Quantity Of Heat (AREA)
  • Radiation Pyrometers (AREA)

Abstract

PURPOSE:To detect temperature of a motor or the like without affection of a strong electromagnetic field by connecting a sensor that consists of a rod lens, polarizer plate, temperature dependent double refraction crystal, wavelength plate and reflection body to the tip end of an optical fiber. CONSTITUTION:Light beam incident from the optical fiber 1 is diffused in the focusing rod lens 2 of 1/4 pitch so that the beam diameter may be expanded, and is made parallel to apply itself to the polarizer plate 4. Only the polarized component that agrees with the direction of polarization is taken by the polarizer plate 4 and applied to the double refraction crystal 5. The light beam is divided into an ordinary ray and an extraordinary ray and a retardation is developed because the C-axis of the double refraction crystal 5 is shifted from the direction of polarization of the polarizer plate 4. When the light ray moves back and forth in the wavelength plate of 1/4 pitch and passes through the double refraction crystal 5 again and reaches the polarizer plate 4, an elliptic polarization is produced, only the component that agrees with the direction of polarization of the polarizer plate 4 is taken.
JP6639079A 1979-05-29 1979-05-29 Optical sensor for detecting temperature Pending JPS55158525A (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
JP6639079A JPS55158525A (en) 1979-05-29 1979-05-29 Optical sensor for detecting temperature
US06/152,163 US4367040A (en) 1979-05-29 1980-05-22 Multi-channel optical sensing system
DE3020454A DE3020454C2 (en) 1979-05-29 1980-05-29 Optical device for transmitting light rays

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP6639079A JPS55158525A (en) 1979-05-29 1979-05-29 Optical sensor for detecting temperature

Publications (1)

Publication Number Publication Date
JPS55158525A true JPS55158525A (en) 1980-12-10

Family

ID=13314443

Family Applications (1)

Application Number Title Priority Date Filing Date
JP6639079A Pending JPS55158525A (en) 1979-05-29 1979-05-29 Optical sensor for detecting temperature

Country Status (1)

Country Link
JP (1) JPS55158525A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61234321A (en) * 1985-04-10 1986-10-18 Hamamatsu Photonics Kk Two-dimensional infrared radiation image detecting device
JPS6463830A (en) * 1987-09-02 1989-03-09 Chino Corp Optical temperature measuring apparatus
CN104344913A (en) * 2014-10-09 2015-02-11 国家电网公司 Temperature measurement system and method based on fiber grating sensing

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61234321A (en) * 1985-04-10 1986-10-18 Hamamatsu Photonics Kk Two-dimensional infrared radiation image detecting device
JPH0533331B2 (en) * 1985-04-10 1993-05-19 Hamamatsu Photonics Kk
JPS6463830A (en) * 1987-09-02 1989-03-09 Chino Corp Optical temperature measuring apparatus
CN104344913A (en) * 2014-10-09 2015-02-11 国家电网公司 Temperature measurement system and method based on fiber grating sensing

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