GB470120A - Improvements in and relating to optical projection apparatus - Google Patents
Improvements in and relating to optical projection apparatusInfo
- Publication number
- GB470120A GB470120A GB1080336A GB1080336A GB470120A GB 470120 A GB470120 A GB 470120A GB 1080336 A GB1080336 A GB 1080336A GB 1080336 A GB1080336 A GB 1080336A GB 470120 A GB470120 A GB 470120A
- Authority
- GB
- United Kingdom
- Prior art keywords
- condenser
- projected
- light
- mirror
- projection apparatus
- 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
- G03B21/10—Projectors with built-in or built-on screen
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Projection Apparatus (AREA)
- Overhead Projectors And Projection Screens (AREA)
Abstract
470,120. Optical projection apparatus. CUSSONS, Ltd., G., and CUSSONS, G. W. April 15, 1936, No. 10803. [Class 97 (i)] An optical projection apparatus wherein the surface of the object, the image of which is to be projected, is illuminated by light projected on to and focused upon it, comprises a source of light, and a compound lens or condenser in which a central portion is made ineffective by placing thereon or therein another lens or lenses through which the image of the illuminated surface of the object is projected in a direction opposite to the illuminating rays, images being projected or reflected by any known means on to a screen. In Fig. 1, light from the source 5 passes through the condenser 6 and water or other cooling means 7 and is reflected from the mirror 8 through the condenser 9 on to the object on the transparent table 15, adjustable in height to focus the light on the object. The projection system 11 is carried in a tube in a hole in the centre of the condenser 9 and the projected rays pass through a tube in the centre of the mirror 8 on to a screen 13. A prism may be interposed to reflect the rays horizontally through holes in the mirror 8 and in the end wall of the casing. Alternatively the prism 22 and the projection lens 11 may both be mounted on the condenser 9, Fig. 4.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB1080336A GB470120A (en) | 1936-04-15 | 1936-04-15 | Improvements in and relating to optical projection apparatus |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB1080336A GB470120A (en) | 1936-04-15 | 1936-04-15 | Improvements in and relating to optical projection apparatus |
Publications (1)
Publication Number | Publication Date |
---|---|
GB470120A true GB470120A (en) | 1937-08-10 |
Family
ID=9974557
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB1080336A Expired GB470120A (en) | 1936-04-15 | 1936-04-15 | Improvements in and relating to optical projection apparatus |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB470120A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2445929A (en) * | 1947-04-07 | 1948-07-27 | Sturgess Wayne | Projector slide viewer |
-
1936
- 1936-04-15 GB GB1080336A patent/GB470120A/en not_active Expired
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2445929A (en) * | 1947-04-07 | 1948-07-27 | Sturgess Wayne | Projector slide viewer |
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