GB873824A - Improvements in or relating to anamorphotic lens systems - Google Patents
Improvements in or relating to anamorphotic lens systemsInfo
- Publication number
- GB873824A GB873824A GB28528/57A GB2852857A GB873824A GB 873824 A GB873824 A GB 873824A GB 28528/57 A GB28528/57 A GB 28528/57A GB 2852857 A GB2852857 A GB 2852857A GB 873824 A GB873824 A GB 873824A
- Authority
- GB
- United Kingdom
- Prior art keywords
- plane
- power
- lens
- cylindrical
- negative
- 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
- 230000007935 neutral effect Effects 0.000 abstract 5
- 230000005499 meniscus Effects 0.000 abstract 3
- 230000003287 optical effect Effects 0.000 abstract 1
Classifications
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B13/00—Optical objectives specially designed for the purposes specified below
- G02B13/08—Anamorphotic objectives
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Lenses (AREA)
Abstract
873,824. Anamorphotic tens systems. KODAK Ltd., Sept. 10, 1957 [Sept. 14, 1956], No. 28528/57. Class 97(1) An anamorphotic lens system for use with a spherical lens system 10 so as to receive therefrom a convergent bundle of imageforming rays and to form an anamorphosed image in a plane 15 near the image plane 12 of the spherical lens system, comprises two cylindrical components and an additional simple meniscus lens element 6 having negative power in the neutral plane and located with its concave surface facing the front of the lens system. The front component consists of two simple cylindrical lenses 1, 2 and has a positive power in the active plane and substantially zero power in the neutral plane, while the second component consists of a positive cylindrical doublet 3, 4 and a simple bi-concave cylindrical lens 5, this component having a negative power in the active plane which is numerically greater than the power of the front component and substantially zero power in the neutral plane. Preferably, the negative meniscus lens element 6 has spherical surfaces and differing negative powers in the active and the neutral planes and may, as shown, be disposed in front of a plano-convex cylindrical lens element 7, which has a positive power in the neutral plane less than the negative power of the element 6 in that plane. Optical data are given for one example of the objective shown. In another form, the meniscus element 6 is formed by a toric lens and in place of the lens 7 a spherical lens of positive power is positioned nearer the front of the objective.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US873824XA | 1956-09-14 | 1956-09-14 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB873824A true GB873824A (en) | 1961-07-26 |
Family
ID=22204858
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB28528/57A Expired GB873824A (en) | 1956-09-14 | 1957-09-10 | Improvements in or relating to anamorphotic lens systems |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB873824A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2280757A (en) * | 1993-08-06 | 1995-02-08 | Samsung Aerospace Ind | Optical system having crossed cylindrical lens groups |
| EP1464999A1 (en) * | 2003-04-04 | 2004-10-06 | Canon Kabushiki Kaisha | Anamorphic converter |
-
1957
- 1957-09-10 GB GB28528/57A patent/GB873824A/en not_active Expired
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2280757A (en) * | 1993-08-06 | 1995-02-08 | Samsung Aerospace Ind | Optical system having crossed cylindrical lens groups |
| EP1464999A1 (en) * | 2003-04-04 | 2004-10-06 | Canon Kabushiki Kaisha | Anamorphic converter |
| US6995920B2 (en) | 2003-04-04 | 2006-02-07 | Canon Kabushiki Kaisha | Anamorphic converter |
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