GB685659A - Improvements in or relating to lens systems - Google Patents
Improvements in or relating to lens systemsInfo
- Publication number
- GB685659A GB685659A GB21771/50A GB2177150A GB685659A GB 685659 A GB685659 A GB 685659A GB 21771/50 A GB21771/50 A GB 21771/50A GB 2177150 A GB2177150 A GB 2177150A GB 685659 A GB685659 A GB 685659A
- Authority
- GB
- United Kingdom
- Prior art keywords
- component
- objective
- sept
- focal length
- smaller
- 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
Classifications
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B13/00—Optical objectives specially designed for the purposes specified below
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Lenses (AREA)
Abstract
685,659. Optical objectives. WILD SURVEYING INSTRUMENTS SUPPLY CO., Ltd., H. Sept. 4, 1950 [Sept. 7, 1949], No. 21771/50. Class 97 (i). In a telescope objective consisting of a front positive system A, consisting of two airseparated components, and a rear negative system B, displaceable for focusing and consisting of a collective component and a dispersive component, the second component of the front system being composed of three lenses and the dispersive component of the negative system facing the image plane, the two components of the rear system are separated by an airspace in the form of a meniscus lens strongly convex towards the image and of an axial thickness greater than 0.001f and smaller than 0.03f, the focal length of the system formed by the front system A and the front collective component of the rear system B being smaller than 0.45f when adjusted for an object at infinity, f being the total focal length of the objective. Data are given for one example of the objective shown.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CH685659X | 1949-09-07 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB685659A true GB685659A (en) | 1953-01-07 |
Family
ID=4528837
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB21771/50A Expired GB685659A (en) | 1949-09-07 | 1950-09-04 | Improvements in or relating to lens systems |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB685659A (en) |
-
1950
- 1950-09-04 GB GB21771/50A patent/GB685659A/en not_active Expired
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