BE781336A - IMPROVED PROJECTION SCREEN - Google Patents
IMPROVED PROJECTION SCREENInfo
- Publication number
- BE781336A BE781336A BE781336A BE781336A BE781336A BE 781336 A BE781336 A BE 781336A BE 781336 A BE781336 A BE 781336A BE 781336 A BE781336 A BE 781336A BE 781336 A BE781336 A BE 781336A
- Authority
- BE
- Belgium
- Prior art keywords
- projection screen
- improved projection
- improved
- screen
- projection
- Prior art date
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
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Overhead Projectors And Projection Screens (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB808771 | 1971-03-29 |
Publications (1)
Publication Number | Publication Date |
---|---|
BE781336A true BE781336A (en) | 1972-07-17 |
Family
ID=9845511
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
BE781336A BE781336A (en) | 1971-03-29 | 1972-03-28 | IMPROVED PROJECTION SCREEN |
Country Status (5)
Country | Link |
---|---|
BE (1) | BE781336A (en) |
DE (1) | DE2214638A1 (en) |
FR (1) | FR2131698A5 (en) |
IT (1) | IT953572B (en) |
NL (1) | NL7204111A (en) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1996021883A2 (en) * | 1995-01-14 | 1996-07-18 | Optica Nova Onab Ab | Projection screen |
CN110554558A (en) * | 2018-05-31 | 2019-12-10 | 深圳光峰科技股份有限公司 | High-contrast reflecting screen |
-
1972
- 1972-03-25 DE DE19722214638 patent/DE2214638A1/en active Pending
- 1972-03-25 IT IT2250072A patent/IT953572B/en active
- 1972-03-27 NL NL7204111A patent/NL7204111A/xx unknown
- 1972-03-28 BE BE781336A patent/BE781336A/en unknown
- 1972-03-28 FR FR7210916A patent/FR2131698A5/en not_active Expired
Also Published As
Publication number | Publication date |
---|---|
NL7204111A (en) | 1972-10-03 |
DE2214638A1 (en) | 1972-10-12 |
FR2131698A5 (en) | 1972-11-10 |
IT953572B (en) | 1973-08-10 |
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