GB560610A - Improvements in or relating to optical objectives - Google Patents
Improvements in or relating to optical objectivesInfo
- Publication number
- GB560610A GB560610A GB1403642A GB1403642A GB560610A GB 560610 A GB560610 A GB 560610A GB 1403642 A GB1403642 A GB 1403642A GB 1403642 A GB1403642 A GB 1403642A GB 560610 A GB560610 A GB 560610A
- Authority
- GB
- United Kingdom
- Prior art keywords
- convergent
- divergent
- elements
- components
- abbú
- 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 Elements Other Than Lenses (AREA)
- Lenses (AREA)
Abstract
560,610. Optical objectives. TAYLOR, TAYLOR, & HOBSON, Ltd., WARMISHAM, A., and WYNNE, C. G. Oct. 6, 1942, No, 14036. Drawings to Specification. [Class 97 (i)] In an objective comprising two divergent components located between two simple convergent components and each consisting of a divergent element compounded with a convergent element, the material for one convergent element has mean refractive index between 1.65 and 1.75 and AbbÚ V number between 34 and 27, and the material for the other convergent elements has mean refractive index between 1.7 and 1.8 and AbbÚ V number greater than 50 and preferably less than 58. The one convergent element may be the front one and be of dense flint glass, the other convergent elements being of #-magnesium oxide crystal; the divergent elements may be of another dense flint glass. The contact surfaces of the divergent components may be uncemented and may have radii greater than 1.5 times the equivalent focal length of the objective. Data for one example are set out.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1403642A GB560610A (en) | 1942-10-06 | 1942-10-06 | Improvements in or relating to optical objectives |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1403642A GB560610A (en) | 1942-10-06 | 1942-10-06 | Improvements in or relating to optical objectives |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB560610A true GB560610A (en) | 1944-04-12 |
Family
ID=10033838
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB1403642A Expired GB560610A (en) | 1942-10-06 | 1942-10-06 | Improvements in or relating to optical objectives |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB560610A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2641966A (en) * | 1950-02-01 | 1953-06-16 | Meopta Narodni Podnik | Four-member photographic objective |
-
1942
- 1942-10-06 GB GB1403642A patent/GB560610A/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2641966A (en) * | 1950-02-01 | 1953-06-16 | Meopta Narodni Podnik | Four-member photographic objective |
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