GB190705504A - Improvements in Kinematographic Objectives and the like for Wide Angle Work. - Google Patents
Improvements in Kinematographic Objectives and the like for Wide Angle Work.Info
- Publication number
- GB190705504A GB190705504A GB190705504DA GB190705504A GB 190705504 A GB190705504 A GB 190705504A GB 190705504D A GB190705504D A GB 190705504DA GB 190705504 A GB190705504 A GB 190705504A
- Authority
- GB
- United Kingdom
- Prior art keywords
- achromatic
- wide angle
- lenses
- lens
- focal length
- 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
- Lenses (AREA)
Abstract
5504. Ives, R. A. Oct. 7. Kinematographs; optical projection apparatics.- In using projection lenses working without stops and collecting a convergent beam from a lantern condenser, a wide angle of picture is obtained by bringing the light to a focus sooner, either by separating the back from the ,frout member a distance equal to at least half the-focal length of the front member, or by making the power of the back member large compared with that of the front combination. Fig. 6 shows a lens in which the separation is about two-thirds the focal length of the front member a, and both members o., b are achromatic with their plane surfaces r', r<6> outwards. In Fig. 7 a lens is shown consisting of a reversed Petzval c, d with one or more positive achromatic combinations e, f, having their plane faces r<10>, r<13> towards the film, interposed between it and the film. The achromatic lenses consist of dense flint and hard crown glasses. Particulars of the lenses used are given.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB190705504T | 1907-10-07 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB190705504A true GB190705504A (en) | 1908-09-17 |
Family
ID=32547566
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB190705504D Expired GB190705504A (en) | 1907-10-07 | 1907-10-07 | Improvements in Kinematographic Objectives and the like for Wide Angle Work. |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB190705504A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3164058A (en) * | 1960-12-01 | 1965-01-05 | Columbia Broadcasting Syst Inc | Film projector and optical system therefor |
-
1907
- 1907-10-07 GB GB190705504D patent/GB190705504A/en not_active Expired
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3164058A (en) * | 1960-12-01 | 1965-01-05 | Columbia Broadcasting Syst Inc | Film projector and optical system therefor |
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