GB696167A - Four lens objective - Google Patents
Four lens objectiveInfo
- Publication number
- GB696167A GB696167A GB1771151A GB1771151A GB696167A GB 696167 A GB696167 A GB 696167A GB 1771151 A GB1771151 A GB 1771151A GB 1771151 A GB1771151 A GB 1771151A GB 696167 A GB696167 A GB 696167A
- Authority
- GB
- United Kingdom
- Prior art keywords
- components
- objective
- component
- convergent
- lens
- 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
696,167. Optical objectives. BERTELE, L. July 26,1951, No. 17711/51. Class 97 (i). An objective consisting of four components, the first a simple convergent lens, the second a convergent meniscus convex towards the front, the third divergent and the fourth a simple convergent lens, the sum of the refractive index of the first lens and of the average refractive index of the elements of the second component for the d-line being greater than 3.10 is characterized in that the air space between the second and third components is shaped as a convergent meniscus convex towards the front, the sum of the thicknesses of the second and third components and of the airspace separating them is greater than 0.11f and smaller than 0.18f, where f is the focal length of the objective, and the AbbÚ number of the glass of the fourth component is less than 45.0. Numerical data are given for one example of the objective shown, for two examples in which all four components are simple and for one in which the third component is a cemented doublet, and the remainder simple components.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1771151A GB696167A (en) | 1951-07-26 | 1951-07-26 | Four lens objective |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1771151A GB696167A (en) | 1951-07-26 | 1951-07-26 | Four lens objective |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB696167A true GB696167A (en) | 1953-08-26 |
Family
ID=10099864
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB1771151A Expired GB696167A (en) | 1951-07-26 | 1951-07-26 | Four lens objective |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB696167A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3033081A (en) * | 1957-11-04 | 1962-05-08 | Agfa Ag | Photographic tele-objective |
| US3108152A (en) * | 1960-01-02 | 1963-10-22 | Leitz Ernst Gmbh | Four member objectve lens |
| US3838911A (en) * | 1972-07-03 | 1974-10-01 | Olympus Optical Co | Telephoto lens system |
| US4081210A (en) * | 1975-02-27 | 1978-03-28 | Robert Bosch Gmbh | Composite four-element lens system, particularly for use with laser beams |
-
1951
- 1951-07-26 GB GB1771151A patent/GB696167A/en not_active Expired
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3033081A (en) * | 1957-11-04 | 1962-05-08 | Agfa Ag | Photographic tele-objective |
| US3108152A (en) * | 1960-01-02 | 1963-10-22 | Leitz Ernst Gmbh | Four member objectve lens |
| US3838911A (en) * | 1972-07-03 | 1974-10-01 | Olympus Optical Co | Telephoto lens system |
| US4081210A (en) * | 1975-02-27 | 1978-03-28 | Robert Bosch Gmbh | Composite four-element lens system, particularly for use with laser beams |
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