GB690403A - Improvements in or relating to optical objectives - Google Patents
Improvements in or relating to optical objectivesInfo
- Publication number
- GB690403A GB690403A GB365751A GB365751A GB690403A GB 690403 A GB690403 A GB 690403A GB 365751 A GB365751 A GB 365751A GB 365751 A GB365751 A GB 365751A GB 690403 A GB690403 A GB 690403A
- Authority
- GB
- United Kingdom
- Prior art keywords
- components
- objective
- convergent
- lies
- taylor
- 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
690,403. Optical objectives. COOK, G. H., and TAYLOR, TAYLOR, & HOBSON, Ltd. Jan. 30, 1952 [Feb. 15, 1951], No. 3657/51. Class 97 (i). In an objective corrected to cover a semiangular field not greater than 30 degrees and 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, 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, and the Petzval curvature of the objective lies between 0.08 and 0.16 times the equivalent power of the objective. Numerical data are given for one example of the objective shown. Specification 690,402 is referred to.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB365751A GB690403A (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 |
|---|---|---|---|
| GB365751A GB690403A (en) | 1951-02-15 | 1951-02-15 | Improvements in or relating to optical objectives |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB690403A true GB690403A (en) | 1953-04-22 |
Family
ID=9762458
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB365751A Expired GB690403A (en) | 1951-02-15 | 1951-02-15 | Improvements in or relating to optical objectives |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB690403A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3127810A1 (en) * | 1980-07-17 | 1982-02-25 | Olympus Optical Co., Ltd., Tokyo | PHOTOGRAPHIC LENS FOR COMPACT CAMERAS |
-
1951
- 1951-02-15 GB GB365751A patent/GB690403A/en not_active Expired
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3127810A1 (en) * | 1980-07-17 | 1982-02-25 | Olympus Optical Co., Ltd., Tokyo | PHOTOGRAPHIC LENS FOR COMPACT CAMERAS |
| DE3127810C2 (en) * | 1980-07-17 | 1983-05-26 | Olympus Optical Co., Ltd., Tokyo | Photographic lens for compact cameras |
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