GB1246432A - Improvements in or relating to temperature sensors - Google Patents

Improvements in or relating to temperature sensors

Info

Publication number
GB1246432A
GB1246432A GB1421270A GB1421270A GB1246432A GB 1246432 A GB1246432 A GB 1246432A GB 1421270 A GB1421270 A GB 1421270A GB 1421270 A GB1421270 A GB 1421270A GB 1246432 A GB1246432 A GB 1246432A
Authority
GB
United Kingdom
Prior art keywords
temperature
polarizing
colour
environment
relating
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.)
Expired
Application number
GB1421270A
Inventor
John Chadwick Brice
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.)
Philips Components Ltd
Original Assignee
Mullard 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 Mullard Ltd filed Critical Mullard Ltd
Priority to GB1421270A priority Critical patent/GB1246432A/en
Publication of GB1246432A publication Critical patent/GB1246432A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/0147—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on thermo-optic effects
    • 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
    • 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

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Nonlinear Science (AREA)
  • Optics & Photonics (AREA)
  • Measuring Temperature Or Quantity Of Heat (AREA)

Abstract

1,246,432. Polarizing apparatus. MULLARD Ltd. March 24, 1970, No. 14212/70. Heading G2J. [Also in Division G1] A temperature indicating device comprises a body 1 of birefringent material the birefringence of which varies with temperature, the body having both a polarizing layer 2 and a reflective surface 3 disposed on opposite surfaces thereof. In use, the body 1 which may be a single crystal of barium strontium niobate in the form of a thin film is located in an environment the temperature of which is required and a parallel beam of white light 4 is directed to the body through a window defined on one side of the body. The colour of the output beam 6 from the device is observed and such colour is indicative of the temperature of the environment in which the device is located. The polarizing layers 2 which may be provided with or separate from the reflective surfaces 3 may be of plastics material.
GB1421270A 1970-03-24 1970-03-24 Improvements in or relating to temperature sensors Expired GB1246432A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB1421270A GB1246432A (en) 1970-03-24 1970-03-24 Improvements in or relating to temperature sensors

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1421270A GB1246432A (en) 1970-03-24 1970-03-24 Improvements in or relating to temperature sensors

Publications (1)

Publication Number Publication Date
GB1246432A true GB1246432A (en) 1971-09-15

Family

ID=10037083

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1421270A Expired GB1246432A (en) 1970-03-24 1970-03-24 Improvements in or relating to temperature sensors

Country Status (1)

Country Link
GB (1) GB1246432A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0013971A1 (en) * 1979-01-22 1980-08-06 Rockwell International Corporation Means for sensing and color multiplexing optical data over a compact fiber optical transmission system
EP0014373A1 (en) * 1979-01-22 1980-08-20 Rockwell International Corporation Optical sensor including a narrow band filter
WO2011158022A1 (en) * 2010-06-15 2011-12-22 Isis Innovation Limited Sensing physical parameters using birefringence

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0013971A1 (en) * 1979-01-22 1980-08-06 Rockwell International Corporation Means for sensing and color multiplexing optical data over a compact fiber optical transmission system
EP0014373A1 (en) * 1979-01-22 1980-08-20 Rockwell International Corporation Optical sensor including a narrow band filter
WO2011158022A1 (en) * 2010-06-15 2011-12-22 Isis Innovation Limited Sensing physical parameters using birefringence

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