GB355452A - Improvements in lenses for photography and the like - Google Patents
Improvements in lenses for photography and the likeInfo
- Publication number
- GB355452A GB355452A GB2114930A GB2114930A GB355452A GB 355452 A GB355452 A GB 355452A GB 2114930 A GB2114930 A GB 2114930A GB 2114930 A GB2114930 A GB 2114930A GB 355452 A GB355452 A GB 355452A
- Authority
- GB
- United Kingdom
- Prior art keywords
- dispersive
- collective
- distortion
- elements
- corrected
- 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
- G02B13/04—Reversed telephoto objectives
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Lenses (AREA)
Abstract
355,452. Lenses. LEE. H. W. and KAPELLA, Ltd., 104, Stoughton Street, Leicester. July 12, 1930, Nos. 21149/30 and 8424/31. [Class 97 (i).] Relates to a photographic &c. lens system of the kind comprising a compound collective member B and a compound dispersive member A on the longer conjugate side of the collective member at a considerable distance therefrom, the dispersive member consisting of two elements I, II, one collective and the other dispersive, the dispersive element being between the collective element and the collective member. According to the invention the collective and dispersive members are jointly corrected for distortion, and the members may be so corrected severally. Freedom from distortion in the dispersive member is obtained by constructing this member so that the algebraic sum of the powers of the adjacent surfaces is positive. Numerical data are given for the form shown, having an aperture of f/2 in which the elements I, II are separated by an airspace III in the shape of a dispersive lens, and for another form in which these elements have a common contact surface. The collective member B is of the kind described in Specification 157,040, [Class 97 (i), Optical systems &c.], and is separately corrected for distortion.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB2114930A GB355452A (en) | 1930-07-12 | 1930-07-12 | Improvements in lenses for photography and the like |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB2114930A GB355452A (en) | 1930-07-12 | 1930-07-12 | Improvements in lenses for photography and the like |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB355452A true GB355452A (en) | 1931-08-27 |
Family
ID=10158012
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB2114930A Expired GB355452A (en) | 1930-07-12 | 1930-07-12 | Improvements in lenses for photography and the like |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB355452A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE953471C (en) * | 1953-12-19 | 1956-11-29 | Zeiss Jena Veb Carl | Photographic lens with a collecting system part and a relatively large distance in front of it, a dispersing meniscus |
| DE968593C (en) * | 1951-06-22 | 1958-03-06 | Voigtlaender A G | Bright lens with anastigmatic flattening of the image field of the extended Gauss type with an upstream meniscus hollow towards the diaphragm |
-
1930
- 1930-07-12 GB GB2114930A patent/GB355452A/en not_active Expired
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE968593C (en) * | 1951-06-22 | 1958-03-06 | Voigtlaender A G | Bright lens with anastigmatic flattening of the image field of the extended Gauss type with an upstream meniscus hollow towards the diaphragm |
| DE953471C (en) * | 1953-12-19 | 1956-11-29 | Zeiss Jena Veb Carl | Photographic lens with a collecting system part and a relatively large distance in front of it, a dispersing meniscus |
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