HK34386A - Zoom lens system having two lens groups - Google Patents
Zoom lens system having two lens groupsInfo
- Publication number
- HK34386A HK34386A HK343/86A HK34386A HK34386A HK 34386 A HK34386 A HK 34386A HK 343/86 A HK343/86 A HK 343/86A HK 34386 A HK34386 A HK 34386A HK 34386 A HK34386 A HK 34386A
- Authority
- HK
- Hong Kong
- Prior art keywords
- lens
- groups
- zoom
- zoom lens
- lens system
- Prior art date
Links
Classifications
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B13/00—Optical objectives specially designed for the purposes specified below
- G02B13/24—Optical objectives specially designed for the purposes specified below for reproducing or copying at short object distances
-
- 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
- G02B15/142—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 two groups only
-
- 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
- G02B15/142—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 two groups only
- G02B15/1421—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 two groups only the first group being positive
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Lenses (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP55145989A JPS5768810A (en) | 1980-10-18 | 1980-10-18 | Variable nagnification lens system for copying |
Publications (1)
Publication Number | Publication Date |
---|---|
HK34386A true HK34386A (en) | 1986-05-23 |
Family
ID=15397599
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
HK343/86A HK34386A (en) | 1980-10-18 | 1986-05-15 | Zoom lens system having two lens groups |
Country Status (5)
Country | Link |
---|---|
US (1) | US4408841A (xx) |
JP (1) | JPS5768810A (xx) |
DE (1) | DE3141246C2 (xx) |
GB (1) | GB2086076B (xx) |
HK (1) | HK34386A (xx) |
Families Citing this family (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6057311A (ja) * | 1983-09-08 | 1985-04-03 | Asahi Optical Co Ltd | 複写用変倍レンズ |
US4832465A (en) * | 1985-08-14 | 1989-05-23 | Asahi Kogaku Kogyo Kabushiki Kaisha | Zoom lens for use in copying |
JPS62264019A (ja) * | 1985-11-28 | 1987-11-17 | Asahi Optical Co Ltd | コンパクトカメラ用ズ−ムレンズ |
JPH07119931B2 (ja) * | 1986-09-27 | 1995-12-20 | 富士写真光機株式会社 | 複写機用光学系 |
US4804981A (en) * | 1988-02-18 | 1989-02-14 | International Business Machines Corporation | Aspheric lens for polygon mirror tilt error correction and scan bow correction in an electrophotographic printer |
JP2582435B2 (ja) * | 1989-04-29 | 1997-02-19 | オリンパス光学工業株式会社 | 撮像光学系 |
JPH07306361A (ja) * | 1994-05-11 | 1995-11-21 | Canon Inc | 小型のズームレンズ |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5713849B1 (xx) * | 1969-09-08 | 1982-03-19 | ||
US3883228A (en) * | 1973-07-09 | 1975-05-13 | Minnesota Mining & Mfg | Variable magnification zoom lens |
US3865470A (en) * | 1973-09-04 | 1975-02-11 | Xerox Corp | Variable magnification lens system |
US3912374A (en) * | 1974-10-17 | 1975-10-14 | Xerox Corp | Six component zoom lens |
JPS5850328B2 (ja) * | 1978-07-12 | 1983-11-10 | 旭光学工業株式会社 | 複写変倍レンズ系 |
JPS56159614A (en) * | 1980-05-13 | 1981-12-09 | Asahi Optical Co Ltd | Copying variable magnification lens system |
-
1980
- 1980-10-18 JP JP55145989A patent/JPS5768810A/ja active Granted
-
1981
- 1981-10-14 GB GB8130998A patent/GB2086076B/en not_active Expired
- 1981-10-15 US US06/311,728 patent/US4408841A/en not_active Expired - Lifetime
- 1981-10-16 DE DE3141246A patent/DE3141246C2/de not_active Expired
-
1986
- 1986-05-15 HK HK343/86A patent/HK34386A/xx not_active IP Right Cessation
Also Published As
Publication number | Publication date |
---|---|
US4408841A (en) | 1983-10-11 |
GB2086076B (en) | 1984-12-12 |
GB2086076A (en) | 1982-05-06 |
DE3141246A1 (de) | 1982-06-09 |
JPS6119011B2 (xx) | 1986-05-15 |
JPS5768810A (en) | 1982-04-27 |
DE3141246C2 (de) | 1984-09-13 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PE | Patent expired |