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 zirconatesInfo
- 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
Links
- 239000013078 crystal Substances 0.000 title abstract 5
- 230000035945 sensitivity Effects 0.000 title abstract 2
- 229910052788 barium Inorganic materials 0.000 title 1
- DSAJWYNOEDNPEQ-UHFFFAOYSA-N barium atom Chemical compound [Ba] DSAJWYNOEDNPEQ-UHFFFAOYSA-N 0.000 title 1
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 abstract 1
- 229910021523 barium zirconate Inorganic materials 0.000 abstract 1
- DQBAOWPVHRWLJC-UHFFFAOYSA-N barium(2+);dioxido(oxo)zirconium Chemical compound [Ba+2].[O-][Zr]([O-])=O DQBAOWPVHRWLJC-UHFFFAOYSA-N 0.000 abstract 1
- 239000011159 matrix material Substances 0.000 abstract 1
- 238000005259 measurement Methods 0.000 abstract 1
- 229910052708 sodium Inorganic materials 0.000 abstract 1
- 239000011734 sodium Substances 0.000 abstract 1
- 230000002269 spontaneous effect Effects 0.000 abstract 1
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
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- General Physics & Mathematics (AREA)
- Spectroscopy & Molecular Physics (AREA)
- Electromagnetism (AREA)
- Photometry And Measurement Of Optical Pulse Characteristics (AREA)
- Radiation Pyrometers (AREA)
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.
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)
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 |
-
1974
- 1974-03-25 FR FR7410151A patent/FR2223868A1/en active Granted
Cited By (3)
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 |