FR2323279A2 - Coloured document reproduction equipment - has thermo-optical system to reproduce simultaneously three chrominance elements of document - Google Patents

Coloured document reproduction equipment - has thermo-optical system to reproduce simultaneously three chrominance elements of document

Info

Publication number
FR2323279A2
FR2323279A2 FR7527328A FR7527328A FR2323279A2 FR 2323279 A2 FR2323279 A2 FR 2323279A2 FR 7527328 A FR7527328 A FR 7527328A FR 7527328 A FR7527328 A FR 7527328A FR 2323279 A2 FR2323279 A2 FR 2323279A2
Authority
FR
France
Prior art keywords
document
thermo
coloured
equipment
optical system
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
FR7527328A
Other languages
French (fr)
Other versions
FR2323279B2 (en
Inventor
Michel Hareng
Serge Le Berre
Eric Spitz
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.)
Thales SA
Original Assignee
Thomson CSF SA
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 Thomson CSF SA filed Critical Thomson CSF SA
Priority to FR7527328A priority Critical patent/FR2323279A2/en
Publication of FR2323279A2 publication Critical patent/FR2323279A2/en
Application granted granted Critical
Publication of FR2323279B2 publication Critical patent/FR2323279B2/fr
Granted legal-status Critical Current

Links

Classifications

    • 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
    • G02F1/132—Thermal activation of liquid crystals exhibiting a thermo-optic effect
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N9/00—Details of colour television systems
    • H04N9/12—Picture reproducers
    • H04N9/31—Projection devices for colour picture display, e.g. using electronic spatial light modulators [ESLM]
    • H04N9/3102—Projection devices for colour picture display, e.g. using electronic spatial light modulators [ESLM] using two-dimensional electronic spatial light modulators
    • H04N9/3105—Projection devices for colour picture display, e.g. using electronic spatial light modulators [ESLM] using two-dimensional electronic spatial light modulators for displaying all colours simultaneously, e.g. by using two or more electronic spatial light modulators
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N9/00—Details of colour television systems
    • H04N9/12—Picture reproducers
    • H04N9/31—Projection devices for colour picture display, e.g. using electronic spatial light modulators [ESLM]
    • H04N9/3141—Constructional details thereof
    • H04N9/315—Modulator illumination systems
    • H04N9/3164—Modulator illumination systems using multiple light sources

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Nonlinear Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Overhead Projectors And Projection Screens (AREA)

Abstract

An equipment for the thermo-optical projection or reproduction of coloured documents is used to obtain the copy at distance. It provides teleprojection or telereprography of documents. The equipment, produces copies by three stages. The first stage records the three chrominances of the document. The second stage projects the three chrominance pictures onto a receiving surface. The third stage erases the three pictures. The equipment has a laser (10) deflectors (12, 13) and a focal lens (11). It also has three mirrors (141-3) three glass-electrode cells (201-3) and three light bulbs (301-3). The cells are connected to a controller (40) to analyse the picture to be produced. the three components of the picture are projected onto a screen (5).
FR7527328A 1975-09-05 1975-09-05 Coloured document reproduction equipment - has thermo-optical system to reproduce simultaneously three chrominance elements of document Granted FR2323279A2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR7527328A FR2323279A2 (en) 1975-09-05 1975-09-05 Coloured document reproduction equipment - has thermo-optical system to reproduce simultaneously three chrominance elements of document

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7527328A FR2323279A2 (en) 1975-09-05 1975-09-05 Coloured document reproduction equipment - has thermo-optical system to reproduce simultaneously three chrominance elements of document

Publications (2)

Publication Number Publication Date
FR2323279A2 true FR2323279A2 (en) 1977-04-01
FR2323279B2 FR2323279B2 (en) 1981-12-31

Family

ID=9159676

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7527328A Granted FR2323279A2 (en) 1975-09-05 1975-09-05 Coloured document reproduction equipment - has thermo-optical system to reproduce simultaneously three chrominance elements of document

Country Status (1)

Country Link
FR (1) FR2323279A2 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0258927A2 (en) * 1986-08-22 1988-03-09 North American Philips Corporation Display system
EP0547601A2 (en) * 1991-12-17 1993-06-23 Texas Instruments Incorporated Color display system using spatial light modulators

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0258927A2 (en) * 1986-08-22 1988-03-09 North American Philips Corporation Display system
EP0258927A3 (en) * 1986-08-22 1991-01-09 North American Philips Corporation Display system
EP0547601A2 (en) * 1991-12-17 1993-06-23 Texas Instruments Incorporated Color display system using spatial light modulators
EP0547601A3 (en) * 1991-12-17 1993-10-13 Texas Instruments Incorporated Color display system using spatial light modulators

Also Published As

Publication number Publication date
FR2323279B2 (en) 1981-12-31

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