GB998090A - Improvements in light valve systems - Google Patents
Improvements in light valve systemsInfo
- 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
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.
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)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1991011745A1 (en) * | 1990-02-02 | 1991-08-08 | De Montfort University | Optical elements |
-
1961
- 1961-06-29 GB GB2356861A patent/GB998090A/en not_active Expired
Cited By (2)
| 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 |
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