FR2223868A1 - Infra red detectors with improved sensitivity - using phase change in mixed crystal of lead and barium zirconates - Google Patents

Infra red detectors with improved sensitivity - using phase change in mixed crystal of lead and barium zirconates

Info

Publication number
FR2223868A1
FR2223868A1 FR7410151A FR7410151A FR2223868A1 FR 2223868 A1 FR2223868 A1 FR 2223868A1 FR 7410151 A FR7410151 A FR 7410151A FR 7410151 A FR7410151 A FR 7410151A FR 2223868 A1 FR2223868 A1 FR 2223868A1
Authority
FR
France
Prior art keywords
mixed crystal
lead
improved sensitivity
phase change
temp
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
FR7410151A
Other languages
French (fr)
Other versions
FR2223868B1 (en
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.)
Licentia Patent Verwaltungs GmbH
Original Assignee
Licentia Patent Verwaltungs GmbH
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
Priority claimed from DE19732315008 external-priority patent/DE2315008C3/en
Application filed by Licentia Patent Verwaltungs GmbH filed Critical Licentia Patent Verwaltungs GmbH
Publication of FR2223868A1 publication Critical patent/FR2223868A1/en
Application granted granted Critical
Publication of FR2223868B1 publication Critical patent/FR2223868B1/fr
Granted 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
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J29/00—Details of cathode-ray tubes or of electron-beam tubes of the types covered by group H01J31/00
    • H01J29/02—Electrodes; Screens; Mounting, supporting, spacing or insulating thereof
    • H01J29/10—Screens on or from which an image or pattern is formed, picked up, converted or stored
    • H01J29/36—Photoelectric screens; Charge-storage screens
    • H01J29/39—Charge-storage screens
    • H01J29/45—Charge-storage screens exhibiting internal electric effects caused by electromagnetic radiation, e.g. photoconductive screen, photodielectric screen, photovoltaic screen
    • H01J29/458—Charge-storage screens exhibiting internal electric effects caused by electromagnetic radiation, e.g. photoconductive screen, photodielectric screen, photovoltaic screen pyroelectrical targets; targets for infrared or ultraviolet or X-ray radiations
    • 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

Abstract

Pyroelectric detector with a pyroelectric crystal operating in a region where the spontaneous polarisation depends not only on the temp. but also on a phase-transition between a ferroelectric- and an antiferroelectric- phase of different crystal structures, the result being improved sensitivity in i.r. detectors for temp. measurement or in image prodn. using several detectors in a matrix or a vidicon. A mixed crystal is used, either lead zirconate and barium zirconate (I) or sodium niobiate and lead zirconate. By altering the compsn. of the mixed crystal, applying a polarising field, and using heat, if necessary, devices can be applied over a wide temp. range and in many applications.
FR7410151A 1973-03-26 1974-03-25 Infra red detectors with improved sensitivity - using phase change in mixed crystal of lead and barium zirconates Granted FR2223868A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19732315008 DE2315008C3 (en) 1973-03-26 Method of operating a pyroelectric detector

Publications (2)

Publication Number Publication Date
FR2223868A1 true FR2223868A1 (en) 1974-10-25
FR2223868B1 FR2223868B1 (en) 1977-09-30

Family

ID=5875947

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7410151A Granted FR2223868A1 (en) 1973-03-26 1974-03-25 Infra red detectors with improved sensitivity - using phase change in mixed crystal of lead and barium zirconates

Country Status (1)

Country Link
FR (1) FR2223868A1 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2368142A1 (en) * 1976-10-15 1978-05-12 Philips Corp VIDICON TUBE EQUIPPED WITH A PYRO-ELECTRIC TARGET WHOSE TEMPERATURE IS STABILIZED
EP2784460A1 (en) * 2013-03-25 2014-10-01 Seiko Epson Corporation Infrared sensor, heat sensing element, and heat sensing method using the same

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2368142A1 (en) * 1976-10-15 1978-05-12 Philips Corp VIDICON TUBE EQUIPPED WITH A PYRO-ELECTRIC TARGET WHOSE TEMPERATURE IS STABILIZED
EP2784460A1 (en) * 2013-03-25 2014-10-01 Seiko Epson Corporation Infrared sensor, heat sensing element, and heat sensing method using the same
US9182287B2 (en) 2013-03-25 2015-11-10 Seiko Epson Corporation Infrared sensor, heat sensing element, and heat sensing method using the same

Also Published As

Publication number Publication date
DE2315008A1 (en) 1974-10-03
DE2315008B2 (en) 1976-07-15
FR2223868B1 (en) 1977-09-30

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Legal Events

Date Code Title Description
ST Notification of lapse