GB697910A - Improvements relating to optical lenses - Google Patents
Improvements relating to optical lensesInfo
- Publication number
- GB697910A GB697910A GB1775450A GB1775450A GB697910A GB 697910 A GB697910 A GB 697910A GB 1775450 A GB1775450 A GB 1775450A GB 1775450 A GB1775450 A GB 1775450A GB 697910 A GB697910 A GB 697910A
- Authority
- GB
- United Kingdom
- Prior art keywords
- component
- convergent
- objective
- doublet
- optical
- 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 -
- G02B9/12—Optical objectives characterised both by the number of the components and their arrangements according to their sign, i.e. + or - having three components only
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Lenses (AREA)
Abstract
697,910. Optical objectives. WRAY (OPTICAL WORKS), Ltd., and WYNNE, C. G. Oct. 10, 1951 [July 15, 1950], No. 17754/50. Class 97 (i). An objective comprises a simple divergent component located between a simple rear convergent component and a front convergent component formed of a converted doublet, alone or followed by a single element, the radius of curvature of the front surface of the objective being less than twothirds of that of either of the surfaces of the rear component so that the power of the front component is considerably increased in comparison with that possible in a lens of the same focal length and consisting of three simple components. The front doublet may be a meniscus convex to the front and having a front convergent element of refractive index greater than or equal to that of the rear component. Numerical data are given for one example of the objective shown and for one example in which the element Al is omitted.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB1775450A GB697910A (en) | 1950-07-15 | 1950-07-15 | Improvements relating to optical lenses |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB1775450A GB697910A (en) | 1950-07-15 | 1950-07-15 | Improvements relating to optical lenses |
Publications (1)
Publication Number | Publication Date |
---|---|
GB697910A true GB697910A (en) | 1953-09-30 |
Family
ID=10100640
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB1775450A Expired GB697910A (en) | 1950-07-15 | 1950-07-15 | Improvements relating to optical lenses |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB697910A (en) |
-
1950
- 1950-07-15 GB GB1775450A patent/GB697910A/en not_active Expired
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