GB561156A - Improvements in or relating to optical objectives - Google Patents
Improvements in or relating to optical objectivesInfo
- Publication number
- GB561156A GB561156A GB1547542A GB1547542A GB561156A GB 561156 A GB561156 A GB 561156A GB 1547542 A GB1547542 A GB 1547542A GB 1547542 A GB1547542 A GB 1547542A GB 561156 A GB561156 A GB 561156A
- Authority
- GB
- United Kingdom
- Prior art keywords
- component
- convergent
- divergent
- objectives
- 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
- G02B9/00—Optical objectives characterised both by the number of the components and their arrangements according to their sign, i.e. + or -
- G02B9/34—Optical objectives characterised both by the number of the components and their arrangements according to their sign, i.e. + or - having four components only
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Optical Integrated Circuits (AREA)
Abstract
561,156. Optical objectives. TAYLOR, TAYLOR, & HOBSON, Ltd., and WARMISHAM, A. Nov. 3, 1942, No. 15475. [Class 97 (i)] In objectives comprising an asymmetrical simple divergent component behind two simple convergent components and in front of another convergent component, the convergent rear component is a triplet comprising a divergent element which is cemented between convergent elements and has a refractive index less than theirs by more than 06 and less than 16. The front cemented surface R<8> may be concave to the front and have radius between 19 and .28 times the equivalent focal length of the objective; the rear surface R<4> of the second component and the front surface R<5> of the third component may be convex to the front. Two of the four convergent elements may have mean refractive indices greater than 1.64, and the third, divergent component may have mean refractive index greater than 1.68. Limits of radii of other surfaces and complete data for one example are set out. Specification 542,508 is referred to.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1547542A GB561156A (en) | 1942-11-03 | 1942-11-03 | Improvements in or relating to optical objectives |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1547542A GB561156A (en) | 1942-11-03 | 1942-11-03 | Improvements in or relating to optical objectives |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB561156A true GB561156A (en) | 1944-05-08 |
Family
ID=10059786
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB1547542A Expired GB561156A (en) | 1942-11-03 | 1942-11-03 | Improvements in or relating to optical objectives |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB561156A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2574995A (en) * | 1950-08-11 | 1951-11-13 | Eastman Kodak Co | Photographic objective consisting of three simple elements and a cemented triplet therebehind |
| US2720814A (en) * | 1953-11-09 | 1955-10-18 | Bell & Howell Co | Cooke type triplet optical objective |
-
1942
- 1942-11-03 GB GB1547542A patent/GB561156A/en not_active Expired
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2574995A (en) * | 1950-08-11 | 1951-11-13 | Eastman Kodak Co | Photographic objective consisting of three simple elements and a cemented triplet therebehind |
| US2720814A (en) * | 1953-11-09 | 1955-10-18 | Bell & Howell Co | Cooke type triplet optical objective |
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