JPS5231743B1 - - Google Patents
Info
- Publication number
- JPS5231743B1 JPS5231743B1 JP38049040A JP4904063A JPS5231743B1 JP S5231743 B1 JPS5231743 B1 JP S5231743B1 JP 38049040 A JP38049040 A JP 38049040A JP 4904063 A JP4904063 A JP 4904063A JP S5231743 B1 JPS5231743 B1 JP S5231743B1
- Authority
- JP
- Japan
- 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.)
- Pending
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
- G02B15/16—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 with interdependent non-linearly related movements between one lens or lens group, and another lens or lens group
- G02B15/163—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 with interdependent non-linearly related movements between one lens or lens group, and another lens or lens group having a first movable lens or lens group and a second movable lens or lens group, both in front of a fixed lens or lens group
- G02B15/167—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 with interdependent non-linearly related movements between one lens or lens group, and another lens or lens group having a first movable lens or lens group and a second movable lens or lens group, both in front of a fixed lens or lens group having an additional fixed front lens or group of lenses
- G02B15/17—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 with interdependent non-linearly related movements between one lens or lens group, and another lens or lens group having a first movable lens or lens group and a second movable lens or lens group, both in front of a fixed lens or lens group having an additional fixed front lens or group of lenses arranged +--
-
- 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)
- Nonlinear Science (AREA)
- Lenses (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB35088/62A GB1064323A (en) | 1962-09-14 | 1962-09-14 | Improvements in or relating to optical objectives of variable equivalent focal length |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS5231743B1 true JPS5231743B1 (en) | 1977-08-17 |
Family
ID=10373658
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP38049040A Pending JPS5231743B1 (en) | 1962-09-14 | 1963-09-14 |
Country Status (5)
| Country | Link |
|---|---|
| JP (1) | JPS5231743B1 (en) |
| CH (1) | CH411383A (en) |
| DE (1) | DE1289327B (en) |
| FR (1) | FR1376655A (en) |
| GB (1) | GB1064323A (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR1520489A (en) * | 1967-01-25 | 1968-04-12 | Optique Prec Soc D | Variable focal length lens |
| JPH1054938A (en) * | 1996-08-12 | 1998-02-24 | Asahi Optical Co Ltd | Large aperture aspherical zoom lens system ] |
| JP3723643B2 (en) * | 1996-08-12 | 2005-12-07 | ペンタックス株式会社 | High zoom ratio zoom lens system |
| CN105676434B (en) * | 2016-04-27 | 2018-08-21 | 佛山华国光学器材有限公司 | A kind of big variable-power optical systems of Penetrating Fog 60X |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB760588A (en) * | 1953-10-09 | 1956-11-07 | Watson W & Sons Ltd | Improvements in or relating to variable magnification optical systems |
| US2766658A (en) * | 1955-05-20 | 1956-10-16 | Schwesinger Gerhard | Variable focal length focusing lens system and device therefor |
| US3038378A (en) * | 1959-01-12 | 1962-06-12 | Bell & Howell Co | Variable focal length optical objective |
| DE1109397B (en) * | 1959-04-20 | 1961-06-22 | Dresden Feinmess | Bright lens of variable focal length with at least 6 times the range of variation |
-
1962
- 1962-09-14 GB GB35088/62A patent/GB1064323A/en not_active Expired
-
1963
- 1963-09-12 DE DER36100A patent/DE1289327B/en active Pending
- 1963-09-13 CH CH1131563A patent/CH411383A/en unknown
- 1963-09-13 FR FR947414A patent/FR1376655A/en not_active Expired
- 1963-09-14 JP JP38049040A patent/JPS5231743B1/ja active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| CH411383A (en) | 1966-04-15 |
| GB1064323A (en) | 1967-04-05 |
| DE1289327B (en) | 1969-02-13 |
| FR1376655A (en) | 1964-10-31 |