GB190813901A - Improvements in and relating to Objectives. - Google Patents
Improvements in and relating to Objectives.Info
- Publication number
- GB190813901A GB190813901A GB190813901DA GB190813901A GB 190813901 A GB190813901 A GB 190813901A GB 190813901D A GB190813901D A GB 190813901DA GB 190813901 A GB190813901 A GB 190813901A
- Authority
- GB
- United Kingdom
- Prior art keywords
- lens
- positive
- negative lens
- objectives
- relating
- 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
13,901. Optische Anstalt C. P. Goerz Akt.-Ges. July 1, 1907, [date applied for under Section 91 of Patents &c. Act, 1907]. Lenses.-A four - lens uncemented objective consists of two unconnected halves, each comprising a positive and a negative lens separated by an air space in the shape of a positive meniscus, the refractive power of the negative lens in each half being not greater than that of the positive lens, and the focal length of one half being at least double that of the other. Constructional data are given, and Specification No. 12,859, A.D. 1898, is referred to.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE190813901X | 1907-07-01 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB190813901A true GB190813901A (en) | 1908-12-03 |
Family
ID=32404987
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB190813901D Expired GB190813901A (en) | 1907-07-01 | 1908-06-30 | Improvements in and relating to Objectives. |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB190813901A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4297208A (en) * | 1980-11-14 | 1981-10-27 | Jude Engineering, Inc. | Inclined helical flight conveyor |
-
1908
- 1908-06-30 GB GB190813901D patent/GB190813901A/en not_active Expired
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4297208A (en) * | 1980-11-14 | 1981-10-27 | Jude Engineering, Inc. | Inclined helical flight conveyor |
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