JPS55122124A - Optical thermometer - Google Patents

Optical thermometer

Info

Publication number
JPS55122124A
JPS55122124A JP2996779A JP2996779A JPS55122124A JP S55122124 A JPS55122124 A JP S55122124A JP 2996779 A JP2996779 A JP 2996779A JP 2996779 A JP2996779 A JP 2996779A JP S55122124 A JPS55122124 A JP S55122124A
Authority
JP
Japan
Prior art keywords
temperature
crystal
substance
phase
clear
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
JP2996779A
Other languages
Japanese (ja)
Inventor
Yutaka Uematsu
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 JP2996779A priority Critical patent/JPS55122124A/en
Publication of JPS55122124A publication Critical patent/JPS55122124A/en
Pending legal-status Critical Current

Links

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  • Measuring Temperature Or Quantity Of Heat (AREA)

Abstract

PURPOSE: To measure temperature easily by providing a substance, the phase of which varies with temperature and the lightness of which changes according to the said phase change, between the branching point and the confluence point of the light ray course.
CONSTITUTION: A ferroelectric crystal that is a solid solution of both KTaO3 and KNbO3 is used, the phase transition temperature varies with the solution rate, the substance is clear in the case of a state of cubic crystal (high temperature side) and changes its ferroelectric area and becomes opeque in the case of a state of tetragonal crystal (low temperature side). Pieces of a crystal of a solution rate the transistion temperature of which becomes 0, 10, 20, 30 and 40°C in turn, for example, are arranged in the order of 11W15 as shown in Figure. The light ray from the light source 4 is equally divided into respective fibers at the branch point 2, passes the phase change substance 11W15 through the lenses 6 and reaches the photodetector 5. When the ambient temperature is, for example, 25°C, the substances 11W13 are clear and other ones 14, 15 are opaque. Accordingly the ambient temperature can be known.
COPYRIGHT: (C)1980,JPO&Japio
JP2996779A 1979-03-16 1979-03-16 Optical thermometer Pending JPS55122124A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2996779A JPS55122124A (en) 1979-03-16 1979-03-16 Optical thermometer

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2996779A JPS55122124A (en) 1979-03-16 1979-03-16 Optical thermometer

Publications (1)

Publication Number Publication Date
JPS55122124A true JPS55122124A (en) 1980-09-19

Family

ID=12290731

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2996779A Pending JPS55122124A (en) 1979-03-16 1979-03-16 Optical thermometer

Country Status (1)

Country Link
JP (1) JPS55122124A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH06148000A (en) * 1992-11-09 1994-05-27 Shin Etsu Chem Co Ltd Temperature sensor
US6513972B1 (en) * 2000-08-31 2003-02-04 Siemens Westinghouse Power Corporation Optical temperature probe, monitoring system, and related methods
JP2012114087A (en) * 2010-11-24 2012-06-14 Fei Co Method of measuring temperature of sample carrier in charged particle-optical apparatus

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH06148000A (en) * 1992-11-09 1994-05-27 Shin Etsu Chem Co Ltd Temperature sensor
US6513972B1 (en) * 2000-08-31 2003-02-04 Siemens Westinghouse Power Corporation Optical temperature probe, monitoring system, and related methods
US6527440B1 (en) * 2000-08-31 2003-03-04 Siemens Westinghouse Power Corporation Optical power generator system condition status indicator and methods of indicating same
JP2012114087A (en) * 2010-11-24 2012-06-14 Fei Co Method of measuring temperature of sample carrier in charged particle-optical apparatus

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