JPS5753718A - Zoom lens system - Google Patents
Zoom lens systemInfo
- Publication number
- JPS5753718A JPS5753718A JP55129838A JP12983880A JPS5753718A JP S5753718 A JPS5753718 A JP S5753718A JP 55129838 A JP55129838 A JP 55129838A JP 12983880 A JP12983880 A JP 12983880A JP S5753718 A JPS5753718 A JP S5753718A
- Authority
- JP
- Japan
- Prior art keywords
- lens
- group
- lens group
- plastic
- 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.)
- Granted
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
- G02B15/142—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)
Abstract
PURPOSE:To obtain a lightweight, high-performance lens system by employing a plastic lens, whose at least one surface of refractive surface is aspherical, in the 1st lens group and arranging the 2nd group and other groups while leaving a variable air gap. CONSTITUTION:This lens system consists of the 1st lens group F which has positive refracting power and includes a plastic lens and a rear group R. The rear lens group R consists of a variator V, a compensator C, and a master lens M. The 1st negative lens and 2nd positive lens in the 1st lens group are plastic ones, and the 2nd and 3rd surfaces are made aspherical, thus realizing high performance. For the 1st lens group, a condition is established as shown by the inequality, on-axis chromatic aberration, aberration variations, and other aberrations are corrected. In the inequality, fI is the focal length of the 1st lens group, and fN that of the negative lens in the 1st lens group.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP55129838A JPS5753718A (en) | 1980-09-17 | 1980-09-17 | Zoom lens system |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP55129838A JPS5753718A (en) | 1980-09-17 | 1980-09-17 | Zoom lens system |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS5753718A true JPS5753718A (en) | 1982-03-30 |
JPH0536765B2 JPH0536765B2 (en) | 1993-05-31 |
Family
ID=15019477
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP55129838A Granted JPS5753718A (en) | 1980-09-17 | 1980-09-17 | Zoom lens system |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5753718A (en) |
Cited By (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS58178315A (en) * | 1982-04-14 | 1983-10-19 | Hitachi Ltd | Zoom lens using plastic lens |
JPS5931921A (en) * | 1982-08-16 | 1984-02-21 | Olympus Optical Co Ltd | Zoom lens |
JPS5979212A (en) * | 1982-10-29 | 1984-05-08 | Canon Inc | Zoom lens using synthetic resin material |
JPS60107013A (en) * | 1983-11-16 | 1985-06-12 | Hitachi Ltd | Zoom lens |
US5579172A (en) * | 1993-07-19 | 1996-11-26 | Nikon Corporation | Zoom lens system |
US5627682A (en) * | 1993-12-09 | 1997-05-06 | Olympus Optical Co., Ltd. | Zoom lens system |
US6038081A (en) * | 1997-05-09 | 2000-03-14 | Konica Corporation | Zoom lens having plastic lens in first lens group |
JP2006126806A (en) * | 2004-09-30 | 2006-05-18 | Nikon Corp | Commonly zoomed optical system, zoom lens and lens system |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5411333A (en) * | 1977-06-20 | 1979-01-27 | Toyobo Co Ltd | Production of protein fibers |
-
1980
- 1980-09-17 JP JP55129838A patent/JPS5753718A/en active Granted
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5411333A (en) * | 1977-06-20 | 1979-01-27 | Toyobo Co Ltd | Production of protein fibers |
Cited By (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS58178315A (en) * | 1982-04-14 | 1983-10-19 | Hitachi Ltd | Zoom lens using plastic lens |
JPS5931921A (en) * | 1982-08-16 | 1984-02-21 | Olympus Optical Co Ltd | Zoom lens |
US4572620A (en) * | 1982-08-16 | 1986-02-25 | Olympus Optical Co., Ltd. | Zoom lens system |
JPS5979212A (en) * | 1982-10-29 | 1984-05-08 | Canon Inc | Zoom lens using synthetic resin material |
JPS60107013A (en) * | 1983-11-16 | 1985-06-12 | Hitachi Ltd | Zoom lens |
US5579172A (en) * | 1993-07-19 | 1996-11-26 | Nikon Corporation | Zoom lens system |
US5627682A (en) * | 1993-12-09 | 1997-05-06 | Olympus Optical Co., Ltd. | Zoom lens system |
US6038081A (en) * | 1997-05-09 | 2000-03-14 | Konica Corporation | Zoom lens having plastic lens in first lens group |
JP2006126806A (en) * | 2004-09-30 | 2006-05-18 | Nikon Corp | Commonly zoomed optical system, zoom lens and lens system |
Also Published As
Publication number | Publication date |
---|---|
JPH0536765B2 (en) | 1993-05-31 |
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