FR2021698A1 - - Google Patents
Info
- Publication number
- FR2021698A1 FR2021698A1 FR6936612A FR6936612A FR2021698A1 FR 2021698 A1 FR2021698 A1 FR 2021698A1 FR 6936612 A FR6936612 A FR 6936612A FR 6936612 A FR6936612 A FR 6936612A FR 2021698 A1 FR2021698 A1 FR 2021698A1
- 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.)
- Withdrawn
Links
Classifications
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B3/00—Simple or compound lenses
- G02B3/02—Simple or compound lenses with non-spherical faces
- G02B3/08—Simple or compound lenses with non-spherical faces with discontinuous faces, e.g. Fresnel lens
-
- 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)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP1968094019U JPS487050Y1 (de) | 1968-10-28 | 1968-10-28 |
Publications (1)
Publication Number | Publication Date |
---|---|
FR2021698A1 true FR2021698A1 (de) | 1970-07-24 |
Family
ID=14098805
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR6936612A Withdrawn FR2021698A1 (de) | 1968-10-28 | 1969-10-24 |
Country Status (4)
Country | Link |
---|---|
JP (1) | JPS487050Y1 (de) |
DE (1) | DE1953715A1 (de) |
FR (1) | FR2021698A1 (de) |
GB (1) | GB1258119A (de) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2427620A1 (fr) * | 1978-05-30 | 1979-12-28 | Rca Corp | Lentille de fresnel, notamment pour concentrateur d'energie solaire |
FR2557983A1 (fr) * | 1984-01-09 | 1985-07-12 | Loison Daniel | Procede et systeme de formation et de projection d'images donnant une impression de relief |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2629186C2 (de) * | 1976-06-29 | 1985-10-03 | Heinrich Wilke Gmbh, 3548 Arolsen | Zwischen zwei Wänden einspannbare Tragstange |
FR2472197A1 (fr) * | 1979-12-18 | 1981-06-26 | Cintra Daniel | Lentille de fresnel et son application a la television |
US4701020A (en) * | 1986-09-18 | 1987-10-20 | North American Philips Consumer Electronics Corp. | Rear projection screen with improved luminance uniformity |
DE4121770A1 (de) * | 1991-07-01 | 1993-01-07 | Wilke Heinrich Hewi Gmbh | Anordnung aus zwei teleskopisch miteinander verbundenen bauelementen |
DE19737107C2 (de) | 1997-08-26 | 2001-02-08 | Fresnel Optics Gmbh | Optische Anordnung bestehend aus mindestens zwei Fresnellinsen und Projektions- bzw. Displayvorrichtung mit dieser Anordnung |
-
1968
- 1968-10-28 JP JP1968094019U patent/JPS487050Y1/ja not_active Expired
-
1969
- 1969-10-17 GB GB1258119D patent/GB1258119A/en not_active Expired
- 1969-10-24 FR FR6936612A patent/FR2021698A1/fr not_active Withdrawn
- 1969-10-24 DE DE19691953715 patent/DE1953715A1/de active Pending
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2427620A1 (fr) * | 1978-05-30 | 1979-12-28 | Rca Corp | Lentille de fresnel, notamment pour concentrateur d'energie solaire |
FR2557983A1 (fr) * | 1984-01-09 | 1985-07-12 | Loison Daniel | Procede et systeme de formation et de projection d'images donnant une impression de relief |
Also Published As
Publication number | Publication date |
---|---|
GB1258119A (de) | 1971-12-22 |
JPS487050Y1 (de) | 1973-02-23 |
DE1953715A1 (de) | 1970-05-27 |
Similar Documents
Legal Events
Date | Code | Title | Description |
---|---|---|---|
ST | Notification of lapse |