GB975309A - Variable focal length lens system - Google Patents
Variable focal length lens systemInfo
- Publication number
- GB975309A GB975309A GB21245/63A GB2124563A GB975309A GB 975309 A GB975309 A GB 975309A GB 21245/63 A GB21245/63 A GB 21245/63A GB 2124563 A GB2124563 A GB 2124563A GB 975309 A GB975309 A GB 975309A
- Authority
- GB
- United Kingdom
- Prior art keywords
- component
- focal length
- variable focal
- length lens
- lens system
- 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
- G02B15/00—Optical objectives with means for varying the magnification
- G02B15/14—Optical objectives with means for varying the magnification by axial movement of one or more lenses or groups of lenses relative to the image plane for continuously varying the equivalent focal length of the objective
- G02B15/144—Optical objectives with means for varying the magnification by axial movement of one or more lenses or groups of lenses relative to the image plane for continuously varying the equivalent focal length of the objective having four groups only
- G02B15/1441—Optical objectives with means for varying the magnification by axial movement of one or more lenses or groups of lenses relative to the image plane for continuously varying the equivalent focal length of the objective having four groups only the first group being positive
- G02B15/144109—Optical objectives with means for varying the magnification by axial movement of one or more lenses or groups of lenses relative to the image plane for continuously varying the equivalent focal length of the objective having four groups only the first group being positive arranged +--+
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Lenses (AREA)
Abstract
975,309. Variable focal length lens systems. P. ANGERIEUX. May 28 1963 [May 28,1962], No. 21245/63. Heading G2J. A variable focal length optical system comprises four components: the first a fixed converging component; the second a movable diverging component consisting of at least three elements of which two are connected together: the third another diverging component: the fourth a converging component consisting of at least two elements; either the third or fourth component being movable with the second component so that the image remains in a fixed plane. A fifth component is used in combination with the system to obtain a real image. Optical data is given in the Specification.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR898902A FR1344261A (en) | 1962-05-28 | 1962-05-28 | Variable focal length lens |
Publications (1)
Publication Number | Publication Date |
---|---|
GB975309A true GB975309A (en) | 1964-11-11 |
Family
ID=8779870
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB21245/63A Expired GB975309A (en) | 1962-05-28 | 1963-05-28 | Variable focal length lens system |
Country Status (2)
Country | Link |
---|---|
FR (1) | FR1344261A (en) |
GB (1) | GB975309A (en) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3464763A (en) * | 1965-04-03 | 1969-09-02 | Zeiss Stiftung | Photographic objective having a continuously variable focal length |
US3501224A (en) * | 1967-01-24 | 1970-03-17 | Asahi Optical Co Ltd | Zoom lens having four lens groups |
US3659921A (en) * | 1969-07-26 | 1972-05-02 | Canon Kk | Zoom lens capable of extreme closeup photography |
DE3210857A1 (en) * | 1981-03-25 | 1982-10-14 | Nippon Kogaku K.K., Tokyo | VARIO LENS, WHICH IS SUITABLE FOR CLOSE-UP SHOOTING |
-
1962
- 1962-05-28 FR FR898902A patent/FR1344261A/en not_active Expired
-
1963
- 1963-05-28 GB GB21245/63A patent/GB975309A/en not_active Expired
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3464763A (en) * | 1965-04-03 | 1969-09-02 | Zeiss Stiftung | Photographic objective having a continuously variable focal length |
US3501224A (en) * | 1967-01-24 | 1970-03-17 | Asahi Optical Co Ltd | Zoom lens having four lens groups |
US3659921A (en) * | 1969-07-26 | 1972-05-02 | Canon Kk | Zoom lens capable of extreme closeup photography |
DE3210857A1 (en) * | 1981-03-25 | 1982-10-14 | Nippon Kogaku K.K., Tokyo | VARIO LENS, WHICH IS SUITABLE FOR CLOSE-UP SHOOTING |
Also Published As
Publication number | Publication date |
---|---|
FR1344261A (en) | 1963-11-29 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
GB1303620A (en) | ||
GB975309A (en) | Variable focal length lens system | |
GB1084437A (en) | Improvements in or relating to optical systems of variable focal lengths | |
GB983342A (en) | Improvements in or relating to lens systems | |
GB1482076A (en) | Focusing of optical systems | |
GB1164679A (en) | An Optical Viewing System for Telescopes or other Optical Devices | |
GB1019402A (en) | Camera objectives | |
GB942966A (en) | Photographic objective of continuously variable focal length | |
GB1023306A (en) | Lens system | |
CA636615A (en) | Optical sighting lens systems | |
GB1034458A (en) | Photographic objective | |
GB995932A (en) | Improvements in or relating to lens systems | |
CA610794A (en) | Optical beam linking systems | |
CA633366A (en) | Optical sighting lens systems | |
CA620825A (en) | Optical sighting lens systems | |
GB1207887A (en) | Wide-angle lens | |
CA667370A (en) | Zoom optical system | |
AU276990B2 (en) | Optical image projecting systems | |
GB1184783A (en) | Lens System | |
AU266754B2 (en) | Beam focusing system | |
CA672309A (en) | Optical projection systems | |
AU3210663A (en) | Optical image projecting systems | |
CA669075A (en) | Zoom lens | |
CA641380A (en) | Optical systems | |
CA736215A (en) | Optical lens systems |