GB564237A - Improvements in or relating to optical projection screens - Google Patents
Improvements in or relating to optical projection screensInfo
- Publication number
- GB564237A GB564237A GB9675/43A GB967543A GB564237A GB 564237 A GB564237 A GB 564237A GB 9675/43 A GB9675/43 A GB 9675/43A GB 967543 A GB967543 A GB 967543A GB 564237 A GB564237 A GB 564237A
- Authority
- GB
- United Kingdom
- Prior art keywords
- layer
- spherules
- sheet
- light
- screen
- 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
-
- 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
- G03B21/62—Translucent screens
- G03B21/625—Lenticular translucent screens
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Surface Treatment Of Glass (AREA)
- Overhead Projectors And Projection Screens (AREA)
Abstract
564,237. Projection screens. KODAK, Ltd. June 16, 1943, No. 9675. Convention date, June 30, 1942. [Class 97 (i)] A rear projection screen comprises a light-absorbing layer into which external light - refracting bodies each forming alight aperture therethrough. The bodies may be spherules 17 of glass, natural or synthetic resin, &c., and may be coloured or colourless. The lightabsorbing layer 16 may be dyed thermoplastic material, gelatin, lacquer, Brunswick black, asphalt varnish, exposed, developed and fixed photographic emulsion, &c., and may support the spherules 17. The layer 16 may be supported on a glass or other transparent sheet 15, or may be stripped therefrom, and the spherules may contact with the sheet 15, or may be separated therefrom by a thin portion of the layer 16. The screen may be made by feeding the sheet 15 by an endless belt under a hopper delivering the light-absorbing medium thereto, into a drying chamber, under a box delivering the spherules on to the layer 16, and into a heating chamber ; the spherules then settle into the layer 16 and may be rolled into it. Distribution to form a single layer may be effected by a doctor, or air jets, or by agitation of the sheet 15. The layer 16 hardens when the screen has passed from the heating chamber and may be stripped from the sheet 15.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US564237XA | 1942-06-30 | 1942-06-30 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB564237A true GB564237A (en) | 1944-09-19 |
Family
ID=22004311
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB9675/43A Expired GB564237A (en) | 1942-06-30 | 1943-06-16 | Improvements in or relating to optical projection screens |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB564237A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3102964A1 (en) * | 1980-01-29 | 1982-01-28 | Matsushita Electric Industrial Co., Ltd., Kadoma, Osaka | TRANSPARENT PROJECTION SCREEN AND METHOD FOR THE PRODUCTION THEREOF |
-
1943
- 1943-06-16 GB GB9675/43A patent/GB564237A/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3102964A1 (en) * | 1980-01-29 | 1982-01-28 | Matsushita Electric Industrial Co., Ltd., Kadoma, Osaka | TRANSPARENT PROJECTION SCREEN AND METHOD FOR THE PRODUCTION THEREOF |
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