JPS5714729A - Temperature measuring device - Google Patents

Temperature measuring device

Info

Publication number
JPS5714729A
JPS5714729A JP8981480A JP8981480A JPS5714729A JP S5714729 A JPS5714729 A JP S5714729A JP 8981480 A JP8981480 A JP 8981480A JP 8981480 A JP8981480 A JP 8981480A JP S5714729 A JPS5714729 A JP S5714729A
Authority
JP
Japan
Prior art keywords
optical
light
wavelengths
inputted
reflected
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
JP8981480A
Other languages
Japanese (ja)
Inventor
Hidenori Nomura
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.)
NEC Corp
Original Assignee
NEC Corp
Nippon 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 NEC Corp, Nippon Electric Co Ltd filed Critical NEC Corp
Priority to JP8981480A priority Critical patent/JPS5714729A/en
Publication of JPS5714729A publication Critical patent/JPS5714729A/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
    • G01K11/12—Measuring temperature based upon physical or chemical changes not covered by groups G01K3/00, G01K5/00, G01K7/00 or G01K9/00 using changes in colour, translucency or reflectance
    • G01K11/18—Measuring temperature based upon physical or chemical changes not covered by groups G01K3/00, G01K5/00, G01K7/00 or G01K9/00 using changes in colour, translucency or reflectance of materials which change translucency

Abstract

PURPOSE:To make possible remote measurement of temperatures in an environment full of electrical noise by detecting changes in spectral transmittance or spectral reflectance due to temperature change in material. CONSTITUTION:Light having wavelengths of 1.25 and 1.5mum from semiconductor lasers 11, 12 is fed to an optical fiber 4 through an optical synthesizing element 2 and a 3dB optical coupling element 3. The light becomes parallel one magnified by a rod lens 51, transmitted through a wafer 52 having In0.75Ga0.25As0.55P0.45 layers laminated on an InP substrate and reflected by a reflecting mirror 53 to be emitted to an optical fiber 4. The light enters the optical coupling element 3 and approximately one half of the light is reflected and fed to an optical divider 6. The latter is separated into light each having wavelengths of 1.25 and 1.5mum, thereby being inputted to optical diodes 71, 72. The output is inputted to an arithmetic processing part 8 and is subjected to division and nonlinear compensation processing to be outputted as a temperature signal. Through this process, temperature is measured remotely in the environment full of electric noise.
JP8981480A 1980-07-01 1980-07-01 Temperature measuring device Pending JPS5714729A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP8981480A JPS5714729A (en) 1980-07-01 1980-07-01 Temperature measuring device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP8981480A JPS5714729A (en) 1980-07-01 1980-07-01 Temperature measuring device

Publications (1)

Publication Number Publication Date
JPS5714729A true JPS5714729A (en) 1982-01-26

Family

ID=13981196

Family Applications (1)

Application Number Title Priority Date Filing Date
JP8981480A Pending JPS5714729A (en) 1980-07-01 1980-07-01 Temperature measuring device

Country Status (1)

Country Link
JP (1) JPS5714729A (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58120712A (en) * 1982-01-08 1983-07-18 Kawasaki Steel Corp Manufacture of extra-low carbon steel in vacuum degassing apparatus
JPS599526A (en) * 1982-07-08 1984-01-18 Agency Of Ind Science & Technol Temperature measuring device
US4575259A (en) * 1983-10-18 1986-03-11 Consiglio Nazionale Delle Ricerche Optical fibre thermometer
US5263776A (en) * 1992-09-25 1993-11-23 International Business Machines Corporation Multi-wavelength optical thermometry
US5322361A (en) * 1993-01-28 1994-06-21 C.I. Systems (Israel) Ltd. Method and apparatus for measuring temperature
US5822074A (en) * 1997-02-25 1998-10-13 Lockheed Martin Idaho Technologies Company Retroreflective systems for remote readout

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS54158954A (en) * 1978-06-02 1979-12-15 Asea Ab Device for measuring fiber optical

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS54158954A (en) * 1978-06-02 1979-12-15 Asea Ab Device for measuring fiber optical

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58120712A (en) * 1982-01-08 1983-07-18 Kawasaki Steel Corp Manufacture of extra-low carbon steel in vacuum degassing apparatus
JPS6334203B2 (en) * 1982-01-08 1988-07-08 Kawasaki Steel Co
JPS599526A (en) * 1982-07-08 1984-01-18 Agency Of Ind Science & Technol Temperature measuring device
JPH0131580B2 (en) * 1982-07-08 1989-06-27 Kogyo Gijutsuin
US4575259A (en) * 1983-10-18 1986-03-11 Consiglio Nazionale Delle Ricerche Optical fibre thermometer
US5263776A (en) * 1992-09-25 1993-11-23 International Business Machines Corporation Multi-wavelength optical thermometry
US5322361A (en) * 1993-01-28 1994-06-21 C.I. Systems (Israel) Ltd. Method and apparatus for measuring temperature
US5822074A (en) * 1997-02-25 1998-10-13 Lockheed Martin Idaho Technologies Company Retroreflective systems for remote readout

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