GB1311921A - Directional light transmitting screens - Google Patents
Directional light transmitting screensInfo
- Publication number
- GB1311921A GB1311921A GB2305470A GB2305470A GB1311921A GB 1311921 A GB1311921 A GB 1311921A GB 2305470 A GB2305470 A GB 2305470A GB 2305470 A GB2305470 A GB 2305470A GB 1311921 A GB1311921 A GB 1311921A
- Authority
- GB
- United Kingdom
- Prior art keywords
- screen
- lens systems
- axes
- light transmitting
- directional light
- 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
- G03B21/606—Projection screens characterised by the nature of the surface for relief projection
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Projection Apparatus (AREA)
- Overhead Projectors And Projection Screens (AREA)
- Devices For Indicating Variable Information By Combining Individual Elements (AREA)
Abstract
1311921 Solar heating RICOH KK 13 May 1970 [18 June 1969] 23054/70 Heading F4U [Also in Division G2] A directional light transmitting projection screen consists of an array of convex lens systems 1, 2, 3 the outer faces of lenses such as 1 and 2 together constituting the two spaced parallel surfaces of the screen, the arrangement of lens systems being such that a light source on one side of the screen is imaged on the other side with a half-tone screen effect. The axes of the lens systems may be parallel and perpendicular to or inclined to the general surfaces of the screen, or the axes may be mutually inclined. Again, the refractive powers of the lens systems may be identical or may differ and be arranged in interlaced patterns in the screen. The lenses 1, 2, 3 may be symmetrically or asymmetrically spaced on their axes. With appropriate choice of axis inclination and refractive power of the lens systems, the screen may be used to provide a focusing system in a solar oven (other applications in Heading G2A).
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP44048475A JPS51456B1 (en) | 1969-06-18 | 1969-06-18 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1311921A true GB1311921A (en) | 1973-03-28 |
Family
ID=12804394
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB2305470A Expired GB1311921A (en) | 1969-06-18 | 1970-05-13 | Directional light transmitting screens |
Country Status (4)
Country | Link |
---|---|
JP (1) | JPS51456B1 (en) |
DE (1) | DE2029800B2 (en) |
FR (1) | FR2046869B1 (en) |
GB (1) | GB1311921A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2234363A (en) * | 1988-12-20 | 1991-01-30 | Michael Ridgway | Stereoscopic system |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2007187745A (en) * | 2006-01-11 | 2007-07-26 | Sony Corp | Image display device |
JP4728825B2 (en) * | 2006-02-06 | 2011-07-20 | 日本放送協会 | 3D image display device |
US8189037B2 (en) * | 2010-03-17 | 2012-05-29 | Seiko Epson Corporation | Various configurations of the viewing window based 3D display system |
DE202016006196U1 (en) | 2016-10-06 | 2017-02-21 | SCI Data GbR (vertretungsberechtigter Gesellschafter: Daniel Linder, 91611 Lehrberg; Patrick Linder, 91611 Lehrberg) | Light source with optical straightening foil |
-
1969
- 1969-06-18 JP JP44048475A patent/JPS51456B1/ja active Pending
-
1970
- 1970-05-13 GB GB2305470A patent/GB1311921A/en not_active Expired
- 1970-06-16 DE DE19702029800 patent/DE2029800B2/en active Granted
- 1970-06-18 FR FR707022486A patent/FR2046869B1/fr not_active Expired
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2234363A (en) * | 1988-12-20 | 1991-01-30 | Michael Ridgway | Stereoscopic system |
Also Published As
Publication number | Publication date |
---|---|
JPS51456B1 (en) | 1976-01-08 |
FR2046869B1 (en) | 1973-01-12 |
FR2046869A1 (en) | 1971-03-12 |
DE2029800B2 (en) | 1976-08-12 |
DE2029800A1 (en) | 1971-01-14 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PS | Patent sealed | ||
PCNP | Patent ceased through non-payment of renewal fee |