GB803229A - Photographic objective - Google Patents
Photographic objectiveInfo
- Publication number
- GB803229A GB803229A GB36107/56A GB3610756A GB803229A GB 803229 A GB803229 A GB 803229A GB 36107/56 A GB36107/56 A GB 36107/56A GB 3610756 A GB3610756 A GB 3610756A GB 803229 A GB803229 A GB 803229A
- Authority
- GB
- United Kingdom
- Prior art keywords
- objective
- diaphragm
- air space
- lying
- component
- 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
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Separation Using Semi-Permeable Membranes (AREA)
Abstract
803,229. Photographic objectives. ZEISSSTIFTUNG, C., [trading as ZEISS, C., [Firm of]]. Nov. 26, 1956 [Dec. 6, 1955], No. 36107/56. Class 97(1) An objective having a back focal length greater than 80 per cent of its focal length f contains at least one meniscus dispersive component distant between 0.5 f and 10 f in front of the diaphragm and concave thereto and contains between this component and the diaphragm at least one air space with boundary surfaces convex to the diaphragm, the radius of each surface lying between -2.5 f and -0.25 f and the quotient of the radii lying between 0.5 and 2.0 and the length of the air space lying between 0.5 and 10 per cent of the sum of the radii of the said boundary surfaces, the objective having, between the said air space and the dispersive meniscus component, at least two collective components, the sum of whose axial thicknesses is between 0.07 L and 0.60 L where L is the overall length of the objective. Numerical data are given for one example of the objective shown.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE803229X | 1955-12-06 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB803229A true GB803229A (en) | 1958-10-22 |
Family
ID=6721122
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB36107/56A Expired GB803229A (en) | 1955-12-06 | 1956-11-26 | Photographic objective |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB803229A (en) |
-
1956
- 1956-11-26 GB GB36107/56A patent/GB803229A/en not_active Expired
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