GB768394A - Improvements in and relating to apparatus for taking composite pictures by photography or television - Google Patents
Improvements in and relating to apparatus for taking composite pictures by photography or televisionInfo
- Publication number
- GB768394A GB768394A GB56/55A GB5655A GB768394A GB 768394 A GB768394 A GB 768394A GB 56/55 A GB56/55 A GB 56/55A GB 5655 A GB5655 A GB 5655A GB 768394 A GB768394 A GB 768394A
- Authority
- GB
- United Kingdom
- Prior art keywords
- screen
- camera
- projector
- television
- reflecting layer
- 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)
- Projection Apparatus (AREA)
Abstract
768,394. Television. ALEKAN, H. A. Jan. 3, 1955 [Jan. 7, 1954], No. 56/55. Class 40 (3). [Also in Group XX] In an installation for television transmission of a composite scene comprising illuminated objects and projected images a camera and an optical projector are situated on the same side of a projection screen and an optical reflector is disposed with respect to the camera and projector so that the virtual image of the objective of one coincides with the objective of the other, the screen being formed of transparent beads of a refractive index between 1.7 and 2.0 embedded in a reflecting layer. In the form shown in Fig. 3 a foreground subject 8 disposed in front of an auto collimating screen 5 is photographed by a camera 6. The background is projected by a projector 7 by reflection from a semi-transparent mirror 9. One form of auto collimating screen is shown in Fig. 2 and comprises a backing layer 1 supporting a reflecting layer 2 in which glass beads 3 are embedded and retained by a binder 4 for example of resin. The reflecting layer may itself be composed of separate layers of which the uppermost is rendered more reflecting by the addition of aluminium flakes. The binder is black, or covered with a black layer and may also contain aluminium flakes. The glass balls are of 0.05-1.5 mm. diameter preferably 0.10- 2.5 mm. and of a refractive index between 1.7 and 2.0, preferably between 1.8 and 1.9. The balls may have a low reflection coating.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR768394X | 1954-01-07 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB768394A true GB768394A (en) | 1957-02-13 |
Family
ID=9184189
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB56/55A Expired GB768394A (en) | 1954-01-07 | 1955-01-03 | Improvements in and relating to apparatus for taking composite pictures by photography or television |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB768394A (en) |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3198097A (en) * | 1962-12-20 | 1965-08-03 | Sheldon H Hine | Illuminating apparatus |
US3227509A (en) * | 1962-05-31 | 1966-01-04 | Baker Hobart | Device for projection and photography of backgrounds |
US3322487A (en) * | 1962-09-15 | 1967-05-30 | Renner Eduard | Apparatus for taking composite pictures by photography with background projection and illumination of the object |
WO1982000911A1 (en) * | 1980-08-29 | 1982-03-18 | M Kassies | Real image projection device |
WO1983003019A1 (en) * | 1982-02-12 | 1983-09-01 | Michiel Kassies | Real image projection device |
-
1955
- 1955-01-03 GB GB56/55A patent/GB768394A/en not_active Expired
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3227509A (en) * | 1962-05-31 | 1966-01-04 | Baker Hobart | Device for projection and photography of backgrounds |
US3322487A (en) * | 1962-09-15 | 1967-05-30 | Renner Eduard | Apparatus for taking composite pictures by photography with background projection and illumination of the object |
US3198097A (en) * | 1962-12-20 | 1965-08-03 | Sheldon H Hine | Illuminating apparatus |
WO1982000911A1 (en) * | 1980-08-29 | 1982-03-18 | M Kassies | Real image projection device |
WO1983003019A1 (en) * | 1982-02-12 | 1983-09-01 | Michiel Kassies | Real image projection device |
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