GB1394541A - System for displaying a point on a transparent or translucent screen - Google Patents

System for displaying a point on a transparent or translucent screen

Info

Publication number
GB1394541A
GB1394541A GB1055273A GB1055273A GB1394541A GB 1394541 A GB1394541 A GB 1394541A GB 1055273 A GB1055273 A GB 1055273A GB 1055273 A GB1055273 A GB 1055273A GB 1394541 A GB1394541 A GB 1394541A
Authority
GB
United Kingdom
Prior art keywords
point
beams
light beams
light
displaying
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.)
Expired
Application number
GB1055273A
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.)
ECA SA
SOC ECA
Original Assignee
ECA SA
SOC ECA
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 ECA SA, SOC ECA filed Critical ECA SA
Publication of GB1394541A publication Critical patent/GB1394541A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
    • G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
    • G02B6/0013—Means for improving the coupling-in of light from the light source into the light guide
    • G02B6/0015—Means for improving the coupling-in of light from the light source into the light guide provided on the surface of the light guide or in the bulk of it
    • G02B6/002—Means for improving the coupling-in of light from the light source into the light guide provided on the surface of the light guide or in the bulk of it by shaping at least a portion of the light guide, e.g. with collimating, focussing or diverging surfaces
    • 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
    • G03B21/00—Projectors or projection-type viewers; Accessories therefor
    • G03B21/54—Accessories
    • G03B21/56—Projection screens
    • G03B21/60—Projection screens characterised by the nature of the surface
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/02—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes by tracing or scanning a light beam on a screen
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
    • G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
    • G02B6/0013—Means for improving the coupling-in of light from the light source into the light guide
    • G02B6/0023—Means for improving the coupling-in of light from the light source into the light guide provided by one optical element, or plurality thereof, placed between the light guide and the light source, or around the light source
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
    • G09F13/00—Illuminated signs; Luminous advertising
    • G09F13/18—Edge-illuminated signs
    • G09F2013/1804—Achieving homogeneous illumination
    • G09F2013/1831—Achieving homogeneous illumination using more than one light source

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Computer Hardware Design (AREA)
  • Theoretical Computer Science (AREA)
  • Optics & Photonics (AREA)
  • Illuminated Signs And Luminous Advertising (AREA)
  • Devices For Indicating Variable Information By Combining Individual Elements (AREA)
  • Lasers (AREA)

Abstract

1394541 Display screens SOC ECA 5 March 1973 [31 March 1972] 10552/73 Heading G5C A point A of a light-transmitting screen 1 is illuminated by a plurality of light beams directed through the edges thereof. As shown in Fig. 1, mirror systems 3, 4, 5 are positioned at the corners of the screen to divide a coherent light beam 6 into three beams a, b, c which intersect at A. The corners are recessed at 26 to facilitate entry of the light beams. Partially reflecting mirrors 7 and 15 together with totally reflecting mirror 20 are rotatable in order to vary the position of point A. In a second embodiment, the three light beams a, b, c are provided by three lasers together with means for deflecting the light beams in the desired directions. The beams may be of different colours.
GB1055273A 1972-03-31 1973-03-05 System for displaying a point on a transparent or translucent screen Expired GB1394541A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7211578A FR2178444A5 (en) 1972-03-31 1972-03-31

Publications (1)

Publication Number Publication Date
GB1394541A true GB1394541A (en) 1975-05-21

Family

ID=9096209

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1055273A Expired GB1394541A (en) 1972-03-31 1973-03-05 System for displaying a point on a transparent or translucent screen

Country Status (6)

Country Link
US (1) US3838917A (en)
BE (1) BE795975A (en)
DE (1) DE2311330C3 (en)
FR (1) FR2178444A5 (en)
GB (1) GB1394541A (en)
NL (1) NL177948C (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19802165A1 (en) * 1998-01-21 1999-07-22 Man Systemelektronik Gmbh Arrangement for evenly illuminating or illuminating an area for displaying information
DE19812090C2 (en) 1998-03-19 2000-03-09 Daimler Chrysler Ag Multi-cylinder piston internal combustion engine with at least two cylinder banks
FR2856159B1 (en) * 2003-06-16 2005-09-09 Laurent Lipiner SYSTEM AND METHOD FOR VISUALIZING IMAGE CONTENT ON TRANSPARENT SURFACE, AND ADAPTED SURFACE COATINGS.

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1302353A (en) * 1917-09-20 1919-04-29 Conrad Friedrich Luminous hair-line.
US2584777A (en) * 1949-04-18 1952-02-05 George S Adolfson Clearance indicating arm
US2898880A (en) * 1956-10-04 1959-08-11 Jr Perry B Newton Single panel illuminated instrument dial

Also Published As

Publication number Publication date
DE2311330B2 (en) 1975-05-07
NL177948C (en) 1985-12-16
BE795975A (en) 1973-06-18
FR2178444A5 (en) 1973-11-09
NL7304443A (en) 1973-10-02
US3838917A (en) 1974-10-01
NL177948B (en) 1985-07-16
DE2311330A1 (en) 1973-10-04
DE2311330C3 (en) 1975-12-11

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PCNP Patent ceased through non-payment of renewal fee