GB190627180A - Improvement in Photographic Lenses. - Google Patents
Improvement in Photographic Lenses.Info
- Publication number
- GB190627180A GB190627180A GB190627180DA GB190627180A GB 190627180 A GB190627180 A GB 190627180A GB 190627180D A GB190627180D A GB 190627180DA GB 190627180 A GB190627180 A GB 190627180A
- Authority
- GB
- United Kingdom
- Prior art keywords
- lenses
- positive
- meniscus
- negative
- combination
- 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
27,180. Beck, C., and Beck, H. C. Nov. 29. Lenses.-The Figure shows an uncemented anastigmatic five-lens combination, consisting of positive lenses L', L<5> and negative lenses L', L<3>, L<4> separated by air spaces, two of which d<7>, d<8> form positive and two d<6>, d<9> negative lenses. The two more powerful of the three negative lenses are meniscus-shaped, and made of glass of greater dispersive power than that of which the positive lenses are made. On one side of the stop, the combination may consist of two meniscus lenses, one negative and the other positive ; while on the other side, a meniscus positive lens is combined with two negative lenses, one at least of which is also a meniscus. In each half of the combination, one at least of the negative lenses has a higher refractive power and dispersion than the corresponding. positive lens. Constructional data are given in the Specification.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB190627180T | 1906-11-29 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB190627180A true GB190627180A (en) | 1907-04-18 |
Family
ID=32631919
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB190627180D Expired GB190627180A (en) | 1906-11-29 | 1906-11-29 | Improvement in Photographic Lenses. |
GB190814673D Expired GB190814673A (en) | 1906-11-29 | 1908-07-10 | Improvement in Photographic Lenses. |
Family Applications After (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB190814673D Expired GB190814673A (en) | 1906-11-29 | 1908-07-10 | Improvement in Photographic Lenses. |
Country Status (1)
Country | Link |
---|---|
GB (2) | GB190627180A (en) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2430150A (en) * | 1942-08-25 | 1947-11-04 | Taylor Taylor & Hobson Ltd | Optical objective |
DE1186236B (en) * | 1958-08-30 | 1965-01-28 | Leitz Ernst Gmbh | Fast photographic lens |
US3051053A (en) * | 1958-10-10 | 1962-08-28 | Zeiss Carl | Photographic objective |
-
1906
- 1906-11-29 GB GB190627180D patent/GB190627180A/en not_active Expired
-
1908
- 1908-07-10 GB GB190814673D patent/GB190814673A/en not_active Expired
Also Published As
Publication number | Publication date |
---|---|
GB190814673A (en) | 1909-07-12 |
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