GB998090A - Improvements in light valve systems - Google Patents

Improvements in light valve systems

Info

Publication number
GB998090A
GB998090A GB2356861A GB2356861A GB998090A GB 998090 A GB998090 A GB 998090A GB 2356861 A GB2356861 A GB 2356861A GB 2356861 A GB2356861 A GB 2356861A GB 998090 A GB998090 A GB 998090A
Authority
GB
United Kingdom
Prior art keywords
light
strips
tape
deformations
opaque
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
GB2356861A
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.)
General Electric Co
Original Assignee
General Electric Co
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
Priority claimed from US799295A external-priority patent/US3078338A/en
Application filed by General Electric Co filed Critical General Electric Co
Publication of GB998090A publication Critical patent/GB998090A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00—Details of television systems
    • H04N5/76—Television signal recording
    • H04N5/80—Television signal recording using electrostatic recording
    • H04N5/82—Television signal recording using electrostatic recording using deformable thermoplastic recording medium
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00—Details of television systems
    • H04N5/74—Projection arrangements for image reproduction, e.g. using eidophor
    • H04N5/7416—Projection arrangements for image reproduction, e.g. using eidophor involving the use of a spatial light modulator, e.g. a light valve, controlled by a video signal
    • H04N5/7425—Projection arrangements for image reproduction, e.g. using eidophor involving the use of a spatial light modulator, e.g. a light valve, controlled by a video signal the modulator being a dielectric deformable layer controlled by an electron beam, e.g. eidophor projector

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Video Image Reproduction Devices For Color Tv Systems (AREA)

Abstract

998,090. Colour projection systems. GENERAL ELECTRIC CO. June 29,1961 [Aug.15, 1960], No. 23568/61. Addition to 944,247. Heading G2J. In a system in which coloured images are to be projected by a lens 47 on to a screen 43,point by point information relating to said coloured images is contained in a tape 21 in the form of orthogonally arranged deformations, some of which are, for example, for diffracting green light in the vertical direction and the others being, for example, for diffracting red and blue light in the horizontal direction. The construction of such a tape is described in the parent Specification. A source of light is provided, for example, by an arc 44 with reflector 45. A mask 50 having rectangular transparent area or openings 51 and a filter mask 52 having corresponding opaque areas 55 are so arranged that light which has traversed the openings 51 and is undeviated by the tape 21 is focused by a lens 46 on the opaque areas 55. In the areas of tape 21 where deformations for deviating green light occur green light from source 44 is diffracted vertically and passes through one of the green filter strips 53 in the mask 52 to be projected by the lens 47 on to the screen 43. Light other than green is blocked by strips 55 or 53. In the areas of tape 21 where deformations for deviating blue light occur, blue light from source 44 is diffracted horizontally and passes through the first of the magenta filter strips 54 provided between the opaque strips 55 to be projected by the lens 47 on to the screen 43. Red light is similarly diffracted horizontally by its corresponding deformations to pass through the second of the magenta strips counting from the opaque strip on which the undeviated light would have fallen. Other colours of light and red light diffracted by the blue-light-diffracting deformations and vice-versa are blocked by the opaque strips 55 or the magenta filter strips 54. Masks 51 and 52 may be interchanged. Specification 954, 644 also is referred to.
GB2356861A 1958-12-24 1961-06-29 Improvements in light valve systems Expired GB998090A (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US78295558A 1958-12-24 1958-12-24
US799295A US3078338A (en) 1958-12-24 1959-03-13 Orthogonal diffraction gratings for color reproduction
US4974660A 1960-08-15 1960-08-15

Publications (1)

Publication Number Publication Date
GB998090A true GB998090A (en) 1965-07-14

Family

ID=27367596

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2356861A Expired GB998090A (en) 1958-12-24 1961-06-29 Improvements in light valve systems

Country Status (1)

Country Link
GB (1) GB998090A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1991011745A1 (en) * 1990-02-02 1991-08-08 De Montfort University Optical elements

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1991011745A1 (en) * 1990-02-02 1991-08-08 De Montfort University Optical elements
US5420718A (en) * 1990-02-02 1995-05-30 De Montfort University Optical image system with improved resolution

Similar Documents

Publication Publication Date Title
GB1531543A (en) Back projection apparatus
GB1027910A (en) Light valve image projection apparatus
GB944247A (en) Improvements in or relating to light valve systems and electrical signal transducer apparatus therefor
GB1381335A (en) Isoluminous additive colour multispectral display
GB998090A (en) Improvements in light valve systems
GB1093068A (en) Character projection unit
GB1314966A (en) Apparatus for projecting hemispherical pictures
DE641734C (en) Device for copying photographic color halftone images
US3702725A (en) Decoding of color-encoded phase grating
GB954999A (en) Display system
SE7603225L (en) COLOR IMAGE PROJECTION DEVICE
GB1282599A (en) Projection of color coded black and white transparencies
GB1448596A (en) Exposure apparatus for the direct photographic production of a phosphor screen on the face-plate of a colour picture tube
GB1373649A (en) Luminance distribution photometers
DE660600C (en) Method for preventing image distortions in separate stereoscopic partial images that are to be reproduced on top of each other
GB1308486A (en) System for processing images
JPS5317225A (en) Projection device of color image
DE3064421D1 (en) Device for projecting colour pictures on a screen and display system comprising such a device
FR2435875A1 (en) Colour picture projection system - has three CRTs, one for each primary colour, with focussing lens before each phosphor screen
GB510412A (en) Improvements in or relating to illumination means for optical projection
GB922965A (en) Improvements in or relating to visual position-indicating arrangements
GB954644A (en) Improvements in color projection systems
EP0034302A3 (en) Colour picture tube without shadow-mask and with only one electron gun
GB1290577A (en)
GB1072481A (en) Improvements relating to colour analysing optical systems