GB690402A - Improvements in or relating to optical objectives - Google Patents
Improvements in or relating to optical objectivesInfo
- Publication number
- GB690402A GB690402A GB365551A GB365551A GB690402A GB 690402 A GB690402 A GB 690402A GB 365551 A GB365551 A GB 365551A GB 365551 A GB365551 A GB 365551A GB 690402 A GB690402 A GB 690402A
- Authority
- GB
- United Kingdom
- Prior art keywords
- components
- convergent
- taylor
- diaphragm
- divergent
- 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)
- Optical Head (AREA)
- Lenses (AREA)
Abstract
690,402. Optical objectives. COOK, G. H., and TAYLOR, TAYLOR, & HOBSON, Ltd. Jan. 30, 1952 [Feb. 15, 1951], No. 3655/51. Class 97 (i). In a corrected objeotive comprising two simple divergent components located between two simple convergent outer components and embracing between them two simple convergent inner components of meniscus form with their surfaces concave towards a diaphragm between them, the outer surfaces of the convergent outer components and the inner surfaces of the divergent components also being concave towards the diaphragm, the sum of the equivalent focal lengths of the two convergent inner components lies between 1.8 F and 2.6 F, where F is the equivalent focal length of the whole objective, and the arithmetic mean between the positive values of the radii of curvature of the outer surfaces of such inner components lies between 0.22 F and 0.44 F. Numerical data are given for one example of the objective shown.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB365551A GB690402A (en) | 1951-02-15 | 1951-02-15 | Improvements in or relating to optical objectives |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB365551A GB690402A (en) | 1951-02-15 | 1951-02-15 | Improvements in or relating to optical objectives |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB690402A true GB690402A (en) | 1953-04-22 |
Family
ID=9762418
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB365551A Expired GB690402A (en) | 1951-02-15 | 1951-02-15 | Improvements in or relating to optical objectives |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB690402A (en) |
-
1951
- 1951-02-15 GB GB365551A patent/GB690402A/en not_active Expired
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