FR2155558A5 - - Google Patents
Info
- Publication number
- FR2155558A5 FR2155558A5 FR7235118A FR7235118A FR2155558A5 FR 2155558 A5 FR2155558 A5 FR 2155558A5 FR 7235118 A FR7235118 A FR 7235118A FR 7235118 A FR7235118 A FR 7235118A FR 2155558 A5 FR2155558 A5 FR 2155558A5
- Authority
- FR
- France
- 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
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B3/00—Simple or compound lenses
-
- 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)
- Optics & Photonics (AREA)
- Overhead Projectors And Projection Screens (AREA)
- Silver Salt Photography Or Processing Solution Therefor (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US18613071A | 1971-10-04 | 1971-10-04 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| FR2155558A5 true FR2155558A5 (enExample) | 1973-05-18 |
Family
ID=22683769
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| FR7235118A Expired FR2155558A5 (enExample) | 1971-10-04 | 1972-10-04 |
Country Status (1)
| Country | Link |
|---|---|
| FR (1) | FR2155558A5 (enExample) |
-
1972
- 1972-10-04 FR FR7235118A patent/FR2155558A5/fr not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| DE2248676B2 (de) | 1975-11-20 |
| DE2248676A1 (de) | 1973-04-19 |
Similar Documents
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| ST | Notification of lapse |