JPS5655824A - Optical type temperature sensor - Google Patents

Optical type temperature sensor

Info

Publication number
JPS5655824A
JPS5655824A JP13233979A JP13233979A JPS5655824A JP S5655824 A JPS5655824 A JP S5655824A JP 13233979 A JP13233979 A JP 13233979A JP 13233979 A JP13233979 A JP 13233979A JP S5655824 A JPS5655824 A JP S5655824A
Authority
JP
Japan
Prior art keywords
light
wavelength
temperature
constitution
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
JP13233979A
Other languages
Japanese (ja)
Inventor
Tetsuo Taniuchi
Akimoto Serizawa
Yoshinobu Tsujimoto
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.)
Panasonic Holdings Corp
Original Assignee
Matsushita Electric Industrial 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 Matsushita Electric Industrial Co Ltd filed Critical Matsushita Electric Industrial Co Ltd
Priority to JP13233979A priority Critical patent/JPS5655824A/en
Publication of JPS5655824A publication Critical patent/JPS5655824A/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

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 make the sensor simple, small-sized and highly reliable by a constitution wherein the light of the prescribed wavelength is injected in a ferromagnetic garnet crystal, the light projected therefrom is detected, and the temperature is detected by utilizing the change in the rate of light absorption of the crystal in relation to the temperature. CONSTITUTION:Luminous diodes of wavelength of 1.06mum and 1.23mum are used as light sources 7 and 8, and the light therefrom is joined by a dichroic filter 9, is passed through a optical 10 and a rod lens 12 and is injected into the crystal 11 of Y3Fe5O12. The light transmitted is passed through a rod lens 12' and a optical 10' and separated by the filter 9. The light separated is detected respectively by photoreceivers 13 and 14 such as photodiodes, the ratio of two signals obtained therefrom is found by a divider 15, and thus an output signal of temperature is obtained. This is based on the fact that the light of the wavelength of 1.06mum has considerably larger temperature dependency of absorption than that of the wavelength of 1.15mum. By this constitution, the device can be made simple, small-sized and highly reliable.
JP13233979A 1979-10-12 1979-10-12 Optical type temperature sensor Pending JPS5655824A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP13233979A JPS5655824A (en) 1979-10-12 1979-10-12 Optical type temperature sensor

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP13233979A JPS5655824A (en) 1979-10-12 1979-10-12 Optical type temperature sensor

Publications (1)

Publication Number Publication Date
JPS5655824A true JPS5655824A (en) 1981-05-16

Family

ID=15079016

Family Applications (1)

Application Number Title Priority Date Filing Date
JP13233979A Pending JPS5655824A (en) 1979-10-12 1979-10-12 Optical type temperature sensor

Country Status (1)

Country Link
JP (1) JPS5655824A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0560685A (en) * 1991-09-03 1993-03-12 Iseki & Co Ltd Temperature estimation method and protein content estimation method by means of near infrared spectral analysis

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0560685A (en) * 1991-09-03 1993-03-12 Iseki & Co Ltd Temperature estimation method and protein content estimation method by means of near infrared spectral analysis

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