GB595422A - Photographic objectives corrected spherically, astigmatically and for coma for one or more colours - Google Patents
Photographic objectives corrected spherically, astigmatically and for coma for one or more coloursInfo
- Publication number
- GB595422A GB595422A GB3648/45A GB364845A GB595422A GB 595422 A GB595422 A GB 595422A GB 3648/45 A GB3648/45 A GB 3648/45A GB 364845 A GB364845 A GB 364845A GB 595422 A GB595422 A GB 595422A
- Authority
- GB
- United Kingdom
- Prior art keywords
- lens
- doublet
- converging
- lenses
- coma
- 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)
- Lenses (AREA)
Abstract
595,422. Photographic objectives. KERN & CO., Ltd. Feb. 14, 1945, No. 3648. Convention date, March 13, 1944. [Class 97 (i)] An objective corrected for spherical aberration, astigmatism and coma for one or more colours comprises as shown converging lenses L1, L2, a diverging doublet made up of lenses L3, L4 and a converging lens L5, the components being air separated and the lens L3 being a converging lens with a refractive index of at least 1.72 and an AbbÚ number greater by at least 4.0 than that of the diverging lens L4. The curvature of the cemented surface of the doublet is greater than that of its front surface, while the difference in the refractive indices of the lenses L2, L4 may be at least 0.07 ; the lens L4 may have a refractive index greater than that of the lens L2 but less than 1.70. One of the converging components, e.g. the second component L2, may be a doublet comprises lenses, the refractive indices of which differ by not more than 0.01 ; the front lens of this doublet may be diverging and may have a smaller AbbÚ number than the rear converging lens of the doublet. Optical data for one example are given.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CH595422X | 1944-03-13 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB595422A true GB595422A (en) | 1947-12-04 |
Family
ID=4522400
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB3648/45A Expired GB595422A (en) | 1944-03-13 | 1945-02-14 | Photographic objectives corrected spherically, astigmatically and for coma for one or more colours |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB595422A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2601367A (en) * | 1949-05-26 | 1952-06-24 | Taylor Taylor & Hobson Ltd | Four-component optical objectives |
| US4057330A (en) * | 1973-10-05 | 1977-11-08 | Nippon Kogaku K.K. | Lens system having large relative aperture and long focus |
-
1945
- 1945-02-14 GB GB3648/45A patent/GB595422A/en not_active Expired
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2601367A (en) * | 1949-05-26 | 1952-06-24 | Taylor Taylor & Hobson Ltd | Four-component optical objectives |
| US4057330A (en) * | 1973-10-05 | 1977-11-08 | Nippon Kogaku K.K. | Lens system having large relative aperture and long focus |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US2405301A (en) | Optical system | |
| GB1019313A (en) | Wide-angle eye-piece | |
| GB595422A (en) | Photographic objectives corrected spherically, astigmatically and for coma for one or more colours | |
| US2562012A (en) | Three-component objective lens system | |
| GB487453A (en) | Improved lens system | |
| GB544658A (en) | Improvements in or relating to optical objectives | |
| GB609669A (en) | Improvements in or relating to optical objectives | |
| GB680221A (en) | Improvements relating to microscope objectives | |
| GB575441A (en) | Improvements in or relating to optical objectives | |
| GB530506A (en) | Improvements in or connected with eye-pieces for optical instruments | |
| GB553844A (en) | Improved lens system | |
| GB782213A (en) | Three-lensed apochromatic objective | |
| GB696902A (en) | Improvements relating to optical lenses | |
| GB629167A (en) | Improvements relating to photographic objectives corrected spherically, astigmatically, and for coma for one or more colours | |
| US2812689A (en) | Unsymmetrical photographic objective with three air-spaced members | |
| US2811082A (en) | Photographic objectives comprising five components axially aligned and air separated | |
| GB697366A (en) | Improvements in or relating to optical objectives | |
| GB1325738A (en) | Apochromatic objectives | |
| GB575075A (en) | Improvements relating to optical lenses | |
| GB677802A (en) | Improvements in optical eye-pieces, particularly for wide angles | |
| GB867261A (en) | Improvements in or relating to fast photographic objectives | |
| GB561156A (en) | Improvements in or relating to optical objectives | |
| GB489381A (en) | Improvements in photographic objectives | |
| GB782211A (en) | Three-lensed apochromatic objective | |
| GB503589A (en) | Improvements in or relating to optical systems |