FR974948A - Grande surface réfléchissante et divergente combinée - Google Patents
Grande surface réfléchissante et divergente combinéeInfo
- Publication number
- FR974948A FR974948A FR974948DA FR974948A FR 974948 A FR974948 A FR 974948A FR 974948D A FR974948D A FR 974948DA FR 974948 A FR974948 A FR 974948A
- Authority
- FR
- France
- Prior art keywords
- surface combined
- large reflective
- divergent surface
- divergent
- reflective
- 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
- G03B21/602—Lenticular screens
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR974948T | 1948-09-13 |
Publications (1)
Publication Number | Publication Date |
---|---|
FR974948A true FR974948A (fr) | 1951-02-27 |
Family
ID=9517773
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR974948D Expired FR974948A (fr) | 1948-09-13 | 1948-09-13 | Grande surface réfléchissante et divergente combinée |
Country Status (1)
Country | Link |
---|---|
FR (1) | FR974948A (fr) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3931022A1 (de) * | 1989-09-16 | 1991-03-28 | Hommelwerke Gmbh | Optischer retroreflektor |
-
1948
- 1948-09-13 FR FR974948D patent/FR974948A/fr not_active Expired
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3931022A1 (de) * | 1989-09-16 | 1991-03-28 | Hommelwerke Gmbh | Optischer retroreflektor |
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