FR2325954A1 - Dispositif de commande d'exposition - Google Patents

Dispositif de commande d'exposition

Info

Publication number
FR2325954A1
FR2325954A1 FR7628455A FR7628455A FR2325954A1 FR 2325954 A1 FR2325954 A1 FR 2325954A1 FR 7628455 A FR7628455 A FR 7628455A FR 7628455 A FR7628455 A FR 7628455A FR 2325954 A1 FR2325954 A1 FR 2325954A1
Authority
FR
France
Prior art keywords
liquid crystal
crystal composition
electrode
electrode elements
verographic
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
FR7628455A
Other languages
English (en)
Other versions
FR2325954B3 (fr
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.)
Xerox Corp
Original Assignee
Xerox Corp
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 Xerox Corp filed Critical Xerox Corp
Publication of FR2325954A1 publication Critical patent/FR2325954A1/fr
Application granted granted Critical
Publication of FR2325954B3 publication Critical patent/FR2325954B3/fr
Granted legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G15/00—Apparatus for electrographic processes using a charge pattern
    • G03G15/04—Apparatus for electrographic processes using a charge pattern for exposing, i.e. imagewise exposure by optically projecting the original image on a photoconductive recording material
    • G03G15/043—Apparatus for electrographic processes using a charge pattern for exposing, i.e. imagewise exposure by optically projecting the original image on a photoconductive recording material with means for controlling illumination or exposure
    • G03G15/0435—Apparatus for electrographic processes using a charge pattern for exposing, i.e. imagewise exposure by optically projecting the original image on a photoconductive recording material with means for controlling illumination or exposure by introducing an optical element in the optical path, e.g. a filter
    • 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 
    • G02F1/13—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 liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1343—Electrodes
    • G02F1/134309—Electrodes characterised by their geometrical arrangement

Landscapes

  • Physics & Mathematics (AREA)
  • Nonlinear Science (AREA)
  • General Physics & Mathematics (AREA)
  • Geometry (AREA)
  • Mathematical Physics (AREA)
  • Chemical & Material Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Optics & Photonics (AREA)
  • Liquid Crystal (AREA)
  • Exposure Or Original Feeding In Electrophotography (AREA)
FR7628455A 1975-09-26 1976-09-22 Dispositif de commande d'exposition Granted FR2325954A1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US61696175A 1975-09-26 1975-09-26

Publications (2)

Publication Number Publication Date
FR2325954A1 true FR2325954A1 (fr) 1977-04-22
FR2325954B3 FR2325954B3 (fr) 1979-06-01

Family

ID=24471704

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7628455A Granted FR2325954A1 (fr) 1975-09-26 1976-09-22 Dispositif de commande d'exposition

Country Status (4)

Country Link
JP (1) JPS5242133A (fr)
BE (1) BE846573A (fr)
FR (1) FR2325954A1 (fr)
SE (1) SE7610411L (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2454638A1 (fr) * 1979-04-17 1980-11-14 Angenieux P Ets Diaphragme a ouverture variable pour des instruments optiques tels que cameras et appareils photographiques
EP0258996A2 (fr) * 1986-07-28 1988-03-09 Alan Purvis Eléments optiques à couches minces
US6437762B1 (en) 1995-01-11 2002-08-20 William A. Birdwell Dynamic diffractive optical transform

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2454638A1 (fr) * 1979-04-17 1980-11-14 Angenieux P Ets Diaphragme a ouverture variable pour des instruments optiques tels que cameras et appareils photographiques
EP0258996A2 (fr) * 1986-07-28 1988-03-09 Alan Purvis Eléments optiques à couches minces
EP0258996A3 (en) * 1986-07-28 1988-03-23 Alan Purvis Thin-film optical components
US4909626A (en) * 1986-07-28 1990-03-20 The General Electric Company, P.L.C. Electrically-controllable thin film Fresnel zone device
US6437762B1 (en) 1995-01-11 2002-08-20 William A. Birdwell Dynamic diffractive optical transform
US7009581B2 (en) 1995-01-11 2006-03-07 Birdwell William A Dynamic diffractive optical transform

Also Published As

Publication number Publication date
JPS5242133A (en) 1977-04-01
SE7610411L (sv) 1977-03-27
BE846573A (fr) 1977-01-17
FR2325954B3 (fr) 1979-06-01

Similar Documents

Publication Publication Date Title
US3588225A (en) Electro-optic devices for portraying closed images
FR2199142B1 (fr)
GB1529214A (en) Electro-optic light control element
GB1534978A (en) Variable focal length apparatus
GB996084A (en) Improvements in and relating to optical devices
GB1534027A (en) Electro-optical modulator device
GB1368378A (en) Ferroelectrictype optical filter
EP0244804A3 (fr) Méthode de commande multiplexée pour un élément optique de commutation comportant un cristal liquide ferroélectrique
FR2325954A1 (fr) Dispositif de commande d'exposition
GB2074356B (en) Passive electro-optic display cell
GB2090036B (en) Liquid crystal display device
JPS5211049A (en) Apparatus for and method of attaching organic polarizing film on optical element without distorting uniform polarization direction
FR2296902A1 (fr) Dispositif d'affichage a valve de lumiere a effet de champ et a cristaux liquides
FR2304934A1 (fr) Circuit optique electriquement commande et application a un repeteur opto-electronique
KR900010457A (ko) 광변조 방법 및 장치
DE3782879D1 (de) Optische schaltvorrichtung.
FR2288363A1 (fr) Dispositif d'affichage electro-optique
FR2250458A5 (en) Electro-optical display device - has birefringent strip and liquid crystal between pair of electrodes
US2055584A (en) Light valve
JPS551512A (en) Watch
FR2285629A1 (fr) Dispositif de projection
JPS5215342A (en) Polarizer manufacteuring proess
GB1414894A (en) Electro-optical devices
JPS57185017A (en) Optical switch for optical fiber
SU1034006A1 (ru) Матричное рельефографическое устройство дл записи информации

Legal Events

Date Code Title Description
ST Notification of lapse