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GB1377891A - Heat sensitive devices - Google Patents

Heat sensitive devices

Info

Publication number
GB1377891A
GB1377891A GB148373*[A GB148373A GB1377891A GB 1377891 A GB1377891 A GB 1377891A GB 148373 A GB148373 A GB 148373A GB 1377891 A GB1377891 A GB 1377891A
Authority
GB
United Kingdom
Prior art keywords
sheet
conductors
pyroelectric
electrodes
region
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
GB148373*[A
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.)
BAE Systems Electronics Ltd
Original Assignee
Marconi 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 Marconi Co Ltd filed Critical Marconi Co Ltd
Priority to GB148373*[A priority Critical patent/GB1377891A/en
Publication of GB1377891A publication Critical patent/GB1377891A/en
Expired 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
    • G01J5/10—Radiation pyrometry, e.g. infrared or optical thermometry using electric radiation detectors
    • G01J5/34—Radiation pyrometry, e.g. infrared or optical thermometry using electric radiation detectors using capacitors, e.g. pyroelectric capacitors
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
    • H01G7/00—Capacitors in which the capacitance is varied by non-mechanical means; Processes of their manufacture
    • H01G7/02—Electrets, i.e. having a permanently-polarised dielectric
    • H01G7/021—Electrets, i.e. having a permanently-polarised dielectric having an organic dielectric
    • H01G7/023—Electrets, i.e. having a permanently-polarised dielectric having an organic dielectric of macromolecular compounds
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10N—ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10N15/00—Thermoelectric devices without a junction of dissimilar materials; Thermomagnetic devices, e.g. using the Nernst-Ettingshausen effect
    • H10N15/10—Thermoelectric devices using thermal change of the dielectric constant, e.g. working above and below the Curie point

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • General Physics & Mathematics (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Radiation Pyrometers (AREA)

Abstract

1377891 Pyroelectric device MARCONI CO Ltd 19 Sept 1973 [11 Jan 1973] 1483/73 Heading H1K A pyroelectric I.R. or heat detector comprises a sheet of plastics material bearing a pair of electrodes on the same major surface of the sheet wherein the region of the sheet in contact with the conductors has been rendered pyroelectric by the application of an electric field. In operation a change in intensity of the I.R. radiation incident on the region produces a change in the state of electrical polarization of the region and thus results in a voltage between the conductors. A sheet of polyvinyl fluoride, polyvinylidene fluoride, polyacrylonitrile, polytrifluorochloroethylene or a polyamide is provided with a pair of interdigitated silver electrodes and the surface of the electrodes is blackened by sulphiding to aid heat absorption. The sheet and conductors are heated to the softening point of the sheet while an electric field is applied across the conductors. The field is maintained while the sheet cools.
GB148373*[A 1973-09-19 1973-09-19 Heat sensitive devices Expired GB1377891A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB148373*[A GB1377891A (en) 1973-09-19 1973-09-19 Heat sensitive devices

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB148373*[A GB1377891A (en) 1973-09-19 1973-09-19 Heat sensitive devices

Publications (1)

Publication Number Publication Date
GB1377891A true GB1377891A (en) 1974-12-18

Family

ID=9722805

Family Applications (1)

Application Number Title Priority Date Filing Date
GB148373*[A Expired GB1377891A (en) 1973-09-19 1973-09-19 Heat sensitive devices

Country Status (1)

Country Link
GB (1) GB1377891A (en)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4147562A (en) 1977-07-05 1979-04-03 Honeywell Inc. Pyroelectric detector
EP0002161A3 (en) * 1977-11-17 1980-05-28 Thomson-Csf Piezo-electric transducing device and process for its manufacture
DE3240920A1 (en) * 1981-11-05 1983-05-19 Kureha Kagaku Kogyo K.K., Nihonbashi, Tokyo PYROELECTRIC INFRARED DETECTOR
GB2170952A (en) * 1985-02-08 1986-08-13 Philips Electronic Associated Infra-red radiation detector devices
DE102006057974A1 (en) * 2006-12-04 2008-06-05 Technische Universität Dresden Direction-sensitive poly-electric infrared sensor for use in passive-infrared motion detector, has signal processing unit accommodated in housing, and sensor elements arranged in such manner that elements produce complete annular ring
DE102006057972A1 (en) * 2006-12-04 2008-06-05 Technische Universität Dresden Pyroelectric infrared sensor for use in motion sensor, has pyroelectric electrodes formed on chip surface as mesh, where width and/or distance of tooth of mesh continuously increase and/or decrease in direction
DE102006057973A1 (en) * 2006-12-04 2008-06-05 Technische Universität Dresden Pyroelectric infrared sensor for use in motion sensor, has pyroelectric chip and low-noise signal processing unit that are accommodated in detector housing, and sensor units to allow teeth of gear wheels to engage with each other

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4147562A (en) 1977-07-05 1979-04-03 Honeywell Inc. Pyroelectric detector
EP0002161A3 (en) * 1977-11-17 1980-05-28 Thomson-Csf Piezo-electric transducing device and process for its manufacture
DE3240920A1 (en) * 1981-11-05 1983-05-19 Kureha Kagaku Kogyo K.K., Nihonbashi, Tokyo PYROELECTRIC INFRARED DETECTOR
GB2170952A (en) * 1985-02-08 1986-08-13 Philips Electronic Associated Infra-red radiation detector devices
US4697081A (en) * 1985-02-08 1987-09-29 U.S. Philips Corp. Infra-red radiation detector devices
DE102006057974A1 (en) * 2006-12-04 2008-06-05 Technische Universität Dresden Direction-sensitive poly-electric infrared sensor for use in passive-infrared motion detector, has signal processing unit accommodated in housing, and sensor elements arranged in such manner that elements produce complete annular ring
DE102006057972A1 (en) * 2006-12-04 2008-06-05 Technische Universität Dresden Pyroelectric infrared sensor for use in motion sensor, has pyroelectric electrodes formed on chip surface as mesh, where width and/or distance of tooth of mesh continuously increase and/or decrease in direction
DE102006057973A1 (en) * 2006-12-04 2008-06-05 Technische Universität Dresden Pyroelectric infrared sensor for use in motion sensor, has pyroelectric chip and low-noise signal processing unit that are accommodated in detector housing, and sensor units to allow teeth of gear wheels to engage with each other
DE102006057972B4 (en) * 2006-12-04 2010-01-28 Technische Universität Dresden Direction-sensitive pyroelectric infrared sensor with comb-shaped electrode structure
DE102006057974B4 (en) * 2006-12-04 2010-03-04 Technische Universität Dresden Direction-sensitive pyroelectric infrared sensor with sickle-shaped electrode structure
DE102006057973B4 (en) * 2006-12-04 2010-08-26 Technische Universität Dresden Direction-sensitive pyroelectric infrared sensor with a serrated electrode structure

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PCNP Patent ceased through non-payment of renewal fee