JPS57194324A - Optical temperature measuring device - Google Patents

Optical temperature measuring device

Info

Publication number
JPS57194324A
JPS57194324A JP56079618A JP7961881A JPS57194324A JP S57194324 A JPS57194324 A JP S57194324A JP 56079618 A JP56079618 A JP 56079618A JP 7961881 A JP7961881 A JP 7961881A JP S57194324 A JPS57194324 A JP S57194324A
Authority
JP
Japan
Prior art keywords
light
temperature
varies
optical fiber
end part
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
JP56079618A
Other languages
Japanese (ja)
Inventor
Masao Hirano
Mitsutaka Kato
Hirohiko Yasuda
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.)
Omron Corp
Original Assignee
Tateisi Electronics Co
Omron Tateisi Electronics Co
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 Tateisi Electronics Co, Omron Tateisi Electronics Co filed Critical Tateisi Electronics Co
Priority to JP56079618A priority Critical patent/JPS57194324A/en
Publication of JPS57194324A publication Critical patent/JPS57194324A/en
Pending legal-status Critical Current

Links

Classifications

    • 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

Landscapes

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

Abstract

PURPOSE:To eliminate the need for optical coupling while reducing the size of constitution, and to achieve high-precision temperature measurement stable with time by using a reflection type optical fiber probe sensor, and then taking the advantage that an optical fiber has a small diameter. CONSTITUTION:The end part 5 of an optical fiber 10 is arranged in an atmosphere of measurement. The end part 5 is coated as a cladding layer 3 with a transparent dielectric 3 which varies in refractive index with temperature. Light is guided into the optical fiber 10 through a beam splitter 13 and a lens 14, and then returned after being reflected by a reflective layer 4. Emitted light is guided to a photodetector 12, wherein the photodetecting element and detecting circuit detect the quantity of the light. Since the refractive index of the cladding layer 3 varies with temperature, the critical angle of total reflection at the end part 5 varies and the transmission loss of the light varies with temperature while the light goes to and returns from the end part. For this purpose, the relation between temperature and the photodetected quantity of light is found previously, so that the temperature is measured by measuring the photodetected quantity of light.
JP56079618A 1981-05-25 1981-05-25 Optical temperature measuring device Pending JPS57194324A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP56079618A JPS57194324A (en) 1981-05-25 1981-05-25 Optical temperature measuring device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP56079618A JPS57194324A (en) 1981-05-25 1981-05-25 Optical temperature measuring device

Publications (1)

Publication Number Publication Date
JPS57194324A true JPS57194324A (en) 1982-11-29

Family

ID=13695041

Family Applications (1)

Application Number Title Priority Date Filing Date
JP56079618A Pending JPS57194324A (en) 1981-05-25 1981-05-25 Optical temperature measuring device

Country Status (1)

Country Link
JP (1) JPS57194324A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59116831U (en) * 1983-01-26 1984-08-07 株式会社フジクラ fiber optic temperature sensor
FR2558952A1 (en) * 1984-01-27 1985-08-02 Spectec Sa Sensor and transmitter of measurements and its operation using the interaction of evanescent optical waves with a medium sensitive to the parameters to be measured, using one or more single-mode or multimode optical fibres
FR2585138A1 (en) * 1985-07-22 1987-01-23 Cordons Equipements Sa Multimode optical fibre having a differential cladding for use as a sensor or a mode filter
WO2009066221A1 (en) * 2007-11-21 2009-05-28 Koninklijke Philips Electronics N.V. Temperature sensor and biosensor using the same

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59116831U (en) * 1983-01-26 1984-08-07 株式会社フジクラ fiber optic temperature sensor
FR2558952A1 (en) * 1984-01-27 1985-08-02 Spectec Sa Sensor and transmitter of measurements and its operation using the interaction of evanescent optical waves with a medium sensitive to the parameters to be measured, using one or more single-mode or multimode optical fibres
FR2585138A1 (en) * 1985-07-22 1987-01-23 Cordons Equipements Sa Multimode optical fibre having a differential cladding for use as a sensor or a mode filter
WO2009066221A1 (en) * 2007-11-21 2009-05-28 Koninklijke Philips Electronics N.V. Temperature sensor and biosensor using the same

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