FR932767A - Perfectionnements aux écrans de projection - Google Patents
Perfectionnements aux écrans de projectionInfo
- Publication number
- FR932767A FR932767A FR932767DA FR932767A FR 932767 A FR932767 A FR 932767A FR 932767D A FR932767D A FR 932767DA FR 932767 A FR932767 A FR 932767A
- Authority
- FR
- France
- Prior art keywords
- projection screens
- screens
- projection
- 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
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB932767X | 1943-10-05 |
Publications (1)
Publication Number | Publication Date |
---|---|
FR932767A true FR932767A (fr) | 1948-04-01 |
Family
ID=10747400
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR932767D Expired FR932767A (fr) | 1943-10-05 | 1946-08-26 | Perfectionnements aux écrans de projection |
Country Status (1)
Country | Link |
---|---|
FR (1) | FR932767A (fr) |
-
1946
- 1946-08-26 FR FR932767D patent/FR932767A/fr not_active Expired
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