JPS5465081A - Optical temperature detector - Google Patents

Optical temperature detector

Info

Publication number
JPS5465081A
JPS5465081A JP13178577A JP13178577A JPS5465081A JP S5465081 A JPS5465081 A JP S5465081A JP 13178577 A JP13178577 A JP 13178577A JP 13178577 A JP13178577 A JP 13178577A JP S5465081 A JPS5465081 A JP S5465081A
Authority
JP
Japan
Prior art keywords
liquid crystal
temperature
light
dynamically
fiber
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.)
Granted
Application number
JP13178577A
Other languages
Japanese (ja)
Other versions
JPS616928B2 (en
Inventor
Akiya Goto
Masahiro Kawamoto
Shoichi Matsumoto
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 JP13178577A priority Critical patent/JPS5465081A/en
Publication of JPS5465081A publication Critical patent/JPS5465081A/en
Publication of JPS616928B2 publication Critical patent/JPS616928B2/ja
Granted 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
    • G01K11/125—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 using changes in reflectance
    • 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
    • G01J5/02—Constructional details
    • G01J5/08—Optical arrangements
    • 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
    • G01J5/02—Constructional details
    • G01J5/08—Optical arrangements
    • G01J5/0803—Arrangements for time-dependent attenuation of radiation signals
    • 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
    • G01J5/02—Constructional details
    • G01J5/08—Optical arrangements
    • G01J5/0818—Waveguides
    • G01J5/0821—Optical fibres
    • 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
    • G01J5/02—Constructional details
    • G01J5/08—Optical arrangements
    • G01J5/0853—Optical arrangements having infrared absorbers other than the usual absorber layers deposited on infrared detectors like bolometers, wherein the heat propagation between the absorber and the detecting element occurs within a solid
    • 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
    • G01J5/02—Constructional details
    • G01J5/08—Optical arrangements
    • G01J5/0879—Optical elements not provided otherwise, e.g. optical manifolds, holograms, cubic beamsplitters, non-dispersive prisms or particular coatings
    • 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
    • G01J5/02—Constructional details
    • G01J5/08—Optical arrangements
    • G01J5/0896—Optical arrangements using a light source, e.g. for illuminating a surface
    • 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
    • G01J5/02—Constructional details
    • G01J5/028—Constructional details using a charging unit or battery

Abstract

PURPOSE:To combine liquid crystal with optical fibers and detect temperature optically by constituting a temperature sensing head with a capsule hermeticaly sealing the liquid crystal. CONSTITUTION:Nematic liquid crystal 12 and mercury battery 13 are hermetically sealed in a glass made capsule 11 whose inside is a vacuum. Optical fibers 2, 3 with their ends being opposed to the liquid crystal 12 are mounted to this temperature sensing head 1. The threshold voltage at temperature T deg.C is constantly applied to the liquid crystal 12. When the temperature is below T deg.C, the liquid crystal does not dynamically scatter and even if the light is sent to the liquid crystal 12 from a light emitting diode LED 4 through the fiber 2, no output is obtainable in the photo diode PD 5. When the temperature is above T deg.C, the threshold voltage lowers and the liquid crystal 12 dynamically scatters. Hence, the light sent from the LED 4 is scattered by the liquid crystal 12 and the reflected light thereof is detected via the fiber 3 with the PD 5. Thereby, whether the temperature is above or below T deg.C may be known.
JP13178577A 1977-11-02 1977-11-02 Optical temperature detector Granted JPS5465081A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP13178577A JPS5465081A (en) 1977-11-02 1977-11-02 Optical temperature detector

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP13178577A JPS5465081A (en) 1977-11-02 1977-11-02 Optical temperature detector

Publications (2)

Publication Number Publication Date
JPS5465081A true JPS5465081A (en) 1979-05-25
JPS616928B2 JPS616928B2 (en) 1986-03-03

Family

ID=15066080

Family Applications (1)

Application Number Title Priority Date Filing Date
JP13178577A Granted JPS5465081A (en) 1977-11-02 1977-11-02 Optical temperature detector

Country Status (1)

Country Link
JP (1) JPS5465081A (en)

Also Published As

Publication number Publication date
JPS616928B2 (en) 1986-03-03

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