GB662689A - Projection screen - Google Patents
Projection screenInfo
- Publication number
- GB662689A GB662689A GB14695/49A GB1469549A GB662689A GB 662689 A GB662689 A GB 662689A GB 14695/49 A GB14695/49 A GB 14695/49A GB 1469549 A GB1469549 A GB 1469549A GB 662689 A GB662689 A GB 662689A
- Authority
- GB
- United Kingdom
- Prior art keywords
- projection screen
- projection
- jan
- june
- class
- 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)
- Overhead Projectors And Projection Screens (AREA)
Abstract
662,689. Projection screens. PHILCO CORPORATION. June 1, 1949 [Jan. 14, 1949], No. 14695/49. Addition to 638,141. Drawing to Specification. Class 97 (i). The projection screen described and claimed in the parent Specification is modified in that the specularly reflecting elements are replaced by light transmitting elements.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US662689XA | 1949-01-14 | 1949-01-14 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB662689A true GB662689A (en) | 1951-12-12 |
Family
ID=22068400
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB14695/49A Expired GB662689A (en) | 1949-01-14 | 1949-06-01 | Projection screen |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB662689A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4310219A (en) * | 1979-04-13 | 1982-01-12 | Societe Suisse Pour L'industrie Horlogere Management Services S.A. | Light diffusing surface structure for a light guide in an information display |
-
1949
- 1949-06-01 GB GB14695/49A patent/GB662689A/en not_active Expired
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4310219A (en) * | 1979-04-13 | 1982-01-12 | Societe Suisse Pour L'industrie Horlogere Management Services S.A. | Light diffusing surface structure for a light guide in an information display |
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