GB190629446A - Improvements in Photographic Objectives - Google Patents
Improvements in Photographic ObjectivesInfo
- Publication number
- GB190629446A GB190629446A GB190629446DA GB190629446A GB 190629446 A GB190629446 A GB 190629446A GB 190629446D A GB190629446D A GB 190629446DA GB 190629446 A GB190629446 A GB 190629446A
- Authority
- GB
- United Kingdom
- Prior art keywords
- cemented
- dispersing
- positive
- presenting
- negative lens
- 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
29,446. Zeiss, C., [Firm of]. Nov. 5, [date applied for under Patents Act, 1901]. Lenses, photographic. Relates to the particular type of double unsymmetrical objective described in Specification No. 6028, A:D. 1890, [Abridgment Class Photography], in which each of the components consists of a positive and negative lens cemented together, a dispersing cemented surface presenting its concavity to the diaphragm on one side, and a collecting cemented surface similarly presenting its convexity on the other side, while in each component, or in the one only possessing the cemented dispersing-surface, the negative lens.has a greater dispersive power than the positive lens. According to the present invention, the refractive index of the positive lens forming the dispersing cemented surface is at least equal to 1À54. Constructional data for two forms are given in the Specification.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE190629446X | 1906-11-05 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB190629446A true GB190629446A (en) | 1907-04-11 |
Family
ID=32241054
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB190629446D Expired GB190629446A (en) | 1906-11-05 | 1906-12-27 | Improvements in Photographic Objectives |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB190629446A (en) |
-
1906
- 1906-12-27 GB GB190629446D patent/GB190629446A/en not_active Expired
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