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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