FR2386107A1 - Obturateur rotatif pour interrompre periodiquement un rayonnement thermique - Google Patents

Obturateur rotatif pour interrompre periodiquement un rayonnement thermique

Info

Publication number
FR2386107A1
FR2386107A1 FR7808464A FR7808464A FR2386107A1 FR 2386107 A1 FR2386107 A1 FR 2386107A1 FR 7808464 A FR7808464 A FR 7808464A FR 7808464 A FR7808464 A FR 7808464A FR 2386107 A1 FR2386107 A1 FR 2386107A1
Authority
FR
France
Prior art keywords
shutter
thermal radiation
periodically interrupting
rotary shutter
interrupting thermal
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.)
Withdrawn
Application number
FR7808464A
Other languages
English (en)
Inventor
Ralph Desmond Nixon
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.)
Teledyne UK Ltd
Original Assignee
English Electric Valve 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 English Electric Valve Co Ltd filed Critical English Electric Valve Co Ltd
Publication of FR2386107A1 publication Critical patent/FR2386107A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/005—Diaphragms
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B9/00—Exposure-making shutters; Diaphragms
    • G03B9/08—Shutters
    • G03B9/10—Blade or disc rotating or pivoting about axis normal to its plane
    • G03B9/16—Two separate members moving in the same direction
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J31/00—Cathode ray tubes; Electron beam tubes
    • H01J31/08—Cathode ray tubes; Electron beam tubes having a screen on or from which an image or pattern is formed, picked up, converted, or stored
    • H01J31/49—Pick-up adapted for an input of electromagnetic radiation other than visible light and having an electric output, e.g. for an input of X-rays, for an input of infrared radiation
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00—Details of television systems
    • H04N5/30—Transforming light or analogous information into electric information
    • H04N5/33—Transforming infrared radiation

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Electromagnetism (AREA)
  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Shutters For Cameras (AREA)
  • Diaphragms For Cameras (AREA)
  • Photometry And Measurement Of Optical Pulse Characteristics (AREA)

Abstract

La présente invention a pour objet un obturateur rotatif 12 pour interrompre périodiquement un rayonnement thermique. Il comprend des lames 10 dont les bords avant 14 et arrière 15 sont de forme spirale Grâce à cette disposition de forme spirale il est possible d'obtenir un meilleur parallélisme entre une direction 18 et les bords 14 et 15 des lames lorsque l'obturateur tourne. L'obturateur trouve son application dans son utilisation avec un tube caméra pyroélectrique de télévision où il permet la construction d'un obturateur de diamètre particulièrement petit et dont les performances sont satisfaisantes.
FR7808464A 1977-03-31 1978-03-23 Obturateur rotatif pour interrompre periodiquement un rayonnement thermique Withdrawn FR2386107A1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB13605/77A GB1551519A (en) 1977-03-31 1977-03-31 Radiation shutters

Publications (1)

Publication Number Publication Date
FR2386107A1 true FR2386107A1 (fr) 1978-10-27

Family

ID=10026081

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7808464A Withdrawn FR2386107A1 (fr) 1977-03-31 1978-03-23 Obturateur rotatif pour interrompre periodiquement un rayonnement thermique

Country Status (6)

Country Link
US (1) US4227210A (fr)
JP (1) JPS53122317A (fr)
DE (1) DE2731654B1 (fr)
FR (1) FR2386107A1 (fr)
GB (1) GB1551519A (fr)
NL (1) NL7802026A (fr)

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3035240A1 (de) * 1980-09-18 1982-04-29 Philips Patentverwaltung Gmbh, 2000 Hamburg Rotierende blende fuer ein pyroelektrisches vidikon
FR2492616A1 (fr) * 1980-10-17 1982-04-23 Thomson Csf Dispositif opto-electronique d'analyse d'images video-frequence par balayage rotatif
US4808804A (en) * 1987-01-28 1989-02-28 Symbol Technologies, Inc. Bar code symbol readers with variable spot size and/or working distance
EP0410745B1 (fr) * 1989-07-28 1995-03-22 Texas Instruments Incorporated Interrupteur périodique à réflecteur pour les systèmes d'imagerie infrarouge
US5051591A (en) * 1989-07-28 1991-09-24 Texas Instruments Incorporated Reflective chopper for infrared imaging systems
GB2247802B (en) * 1990-09-05 1994-09-07 Marconi Gec Ltd Imaging system
GB2250155A (en) * 1990-09-05 1992-05-27 Marconi Gec Ltd An imager with image microscanned over sensor array
CH681394A5 (fr) * 1990-12-18 1993-03-15 Volpi Ag
WO1994029760A1 (fr) * 1993-06-04 1994-12-22 Summit Technology, Inc. Appareil a ouverture rotative et procedes de photoablation de surfaces
US5656813A (en) * 1995-04-04 1997-08-12 Gmd Systems, Inc. Apparatus for imaging gas
US5952661A (en) * 1996-08-16 1999-09-14 Raytheon Company Chopper for thermal imaging system and method
US6744493B1 (en) * 2000-07-05 2004-06-01 Euv Llc In-vacuum exposure shutter

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1777556A (en) * 1929-03-13 1930-10-07 Callo D Fahrney Television
FR834067A (fr) * 1937-02-22 1938-11-10 Loewe Opta Gmbh Dispositif destiné à l'exploration interlignée d'une surface de projection qui est immobile par rapport au dispositif d'exploration muni d'un disque d'exploration
FR1141101A (fr) * 1956-01-13 1957-08-26 Ile Centrinfrel Soc Civ Analyseur mécanique pour télévision
US4073576A (en) * 1976-08-30 1978-02-14 North American Philips Corporation Device for chopping an optical beam

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2339256A (en) * 1941-10-03 1944-01-18 Columbia Broadeasting System I Television
US2403066A (en) * 1943-12-28 1946-07-02 Rca Corp System for forming images of heatradiating objects
US3256438A (en) * 1955-11-14 1966-06-14 Texaco Development Corp Radioactivity analysis of a medium utilizing a pulsed neutron source
NL261389A (fr) * 1960-02-19
US3638025A (en) * 1963-10-01 1972-01-25 Trw Inc Method and apparatus for location of radiant energy source
US4040744A (en) * 1973-10-05 1977-08-09 General Dynamics Multiple spectrum co-axial optical sight and closed loop gun control system

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1777556A (en) * 1929-03-13 1930-10-07 Callo D Fahrney Television
FR834067A (fr) * 1937-02-22 1938-11-10 Loewe Opta Gmbh Dispositif destiné à l'exploration interlignée d'une surface de projection qui est immobile par rapport au dispositif d'exploration muni d'un disque d'exploration
FR1141101A (fr) * 1956-01-13 1957-08-26 Ile Centrinfrel Soc Civ Analyseur mécanique pour télévision
US4073576A (en) * 1976-08-30 1978-02-14 North American Philips Corporation Device for chopping an optical beam
FR2363089A1 (fr) * 1976-08-30 1978-03-24 Philips Corp Dispositif et procede pour interrompre un faisceau optique

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
EXBK/76 *

Also Published As

Publication number Publication date
DE2731654B1 (de) 1978-08-24
JPS53122317A (en) 1978-10-25
GB1551519A (en) 1979-08-30
NL7802026A (nl) 1978-10-03
US4227210A (en) 1980-10-07

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Legal Events

Date Code Title Description
ST Notification of lapse