GB190625908A - Improved Mirrorbox for Photography in Colours. - Google Patents
Improved Mirrorbox for Photography in Colours.Info
- Publication number
- GB190625908A GB190625908A GB190625908DA GB190625908A GB 190625908 A GB190625908 A GB 190625908A GB 190625908D A GB190625908D A GB 190625908DA GB 190625908 A GB190625908 A GB 190625908A
- Authority
- GB
- United Kingdom
- Prior art keywords
- reflectors
- nos
- plates
- component
- images
- 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
Landscapes
- Endoscopes (AREA)
- Cameras Adapted For Combination With Other Photographic Or Optical Apparatuses (AREA)
Abstract
25,908. Pfenninger, 0. Nov. 16. Photochromoscopes.-In photochromoscopic apparatus such as is described in Specification No. 3784, A.D. 1895, methods are described for compensating for the unequal contraction of the three component pictures which results from the passage of light through the inclined reflectors for the component images, and which materially affects the superposition of component prints in three-colour printing. In the mirror box shown in Fig. 2, no objective lens is used in the front aperture, three lenses o<1>, o<2>, o<3> being provided for the component images. In one method of compensation, plates P<3>, P<4>, P<5> similar to the reflecting-plate P' are interposed in the side compartments, so that each beam forming a component image is transmitted through two of these plates. An additional plate or lens Z may also be required in the central path to compensate for the shorter path of the central beam. If it is desired to correct for the contracted images so as to bring the shape more nearly to correspond with its normal shape, three or other additional plates must be used in the compartments, but sloping from front to back in the same manner as described in Specification No. 25,907, A.D. 1906. In another method, prismatic reflectors P, Fig. 5, of small angle, are used. If two such reflectors are used, the plates P<3>, P' shown are not necessary. Reflecting-prisms may be used instead of reflectors m. The reflectors P need not be used at forty-five degrees, but smaller angles can be employed as shown in Fig. 6. The prisms in such cases are not right-angled, but greater or less as the case may be. Specifications No. 3784, A.D. 1895, No. 23,940, A.D. 1898, Nos. 13,666, 15,753, and 17,514, A.D. 1899, Nos. 10,795 and 12,181, A.D. 1900, No. 13,468, A.D. 1902, Nos. 3729 and 24,829, A.D. 1903, and Nos. 322 and 14,623, A.D. 1905, [Abridgment Class Photography], are referred to.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB190625908T | 1906-11-16 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB190625908A true GB190625908A (en) | 1907-07-04 |
Family
ID=32257200
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB190625908D Expired GB190625908A (en) | 1906-11-16 | 1906-11-16 | Improved Mirrorbox for Photography in Colours. |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB190625908A (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2669900A (en) * | 1949-02-01 | 1954-02-23 | Rca Corp | Optical projection and registration system |
US2672072A (en) * | 1951-03-15 | 1954-03-16 | Rca Corp | Color television optical system |
US2792740A (en) * | 1952-06-28 | 1957-05-21 | Rca Corp | Multi-path optical systems |
-
1906
- 1906-11-16 GB GB190625908D patent/GB190625908A/en not_active Expired
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2669900A (en) * | 1949-02-01 | 1954-02-23 | Rca Corp | Optical projection and registration system |
US2672072A (en) * | 1951-03-15 | 1954-03-16 | Rca Corp | Color television optical system |
US2792740A (en) * | 1952-06-28 | 1957-05-21 | Rca Corp | Multi-path optical systems |
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