JPS5360655A - Zoom lens for infinite conjugate distance - Google Patents
Zoom lens for infinite conjugate distanceInfo
- Publication number
- JPS5360655A JPS5360655A JP13592676A JP13592676A JPS5360655A JP S5360655 A JPS5360655 A JP S5360655A JP 13592676 A JP13592676 A JP 13592676A JP 13592676 A JP13592676 A JP 13592676A JP S5360655 A JPS5360655 A JP S5360655A
- Authority
- JP
- Japan
- Prior art keywords
- zoom lens
- conjugate distance
- infinite conjugate
- magnification
- infinite
- 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
- 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
- G02B15/144—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
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Lenses (AREA)
Abstract
PURPOSE: To completely eliminate the distorsion aberration, while maintaining the conjugate distance at a constant level during magnification, by moving first and second movable lens groups asymmetrically with respect to a diaphragm in response to the movement of a whole lens system for magnification.
COPYRIGHT: (C)1978,JPO&Japio
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP51135926A JPS589401B2 (en) | 1976-11-12 | 1976-11-12 | Zoom lens at finite distance |
DE2750571A DE2750571C3 (en) | 1976-11-12 | 1977-11-11 | Varifocal lens |
DE7734692U DE7734692U1 (en) | 1976-11-12 | 1977-11-11 | ZOOM LENS SYSTEM |
GB47254/77A GB1595088A (en) | 1976-11-12 | 1977-11-14 | Zoom lens systems |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP51135926A JPS589401B2 (en) | 1976-11-12 | 1976-11-12 | Zoom lens at finite distance |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS5360655A true JPS5360655A (en) | 1978-05-31 |
JPS589401B2 JPS589401B2 (en) | 1983-02-21 |
Family
ID=15163074
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP51135926A Expired JPS589401B2 (en) | 1976-11-12 | 1976-11-12 | Zoom lens at finite distance |
Country Status (3)
Country | Link |
---|---|
JP (1) | JPS589401B2 (en) |
DE (2) | DE2750571C3 (en) |
GB (1) | GB1595088A (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3022732A1 (en) * | 1979-06-20 | 1981-01-15 | Asahi Optical Co Ltd | ZOOM LENS FOR A COPYING SYSTEM |
JPS5767909A (en) * | 1980-10-15 | 1982-04-24 | Canon Inc | Variable magnification optical system |
DE3544148A1 (en) * | 1984-12-13 | 1986-06-26 | Asahi Kogaku Kogyo K.K., Tokio/Tokyo | LENS FOR COPYING WITH VARIABLE IMAGE SIZE |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5961814A (en) * | 1982-09-30 | 1984-04-09 | Fuji Photo Optical Co Ltd | Zoom lens system of conjugate distance |
JPS59117722U (en) * | 1983-01-28 | 1984-08-08 | 昭和アルミニウム株式会社 | Assembly roof frame |
JPS59158843A (en) * | 1983-02-24 | 1984-09-08 | 青木 信行 | Metal balcony |
JP2587669B2 (en) * | 1988-01-14 | 1997-03-05 | 富士写真光機株式会社 | Variable magnification lens system for copying |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS4727015U (en) * | 1971-02-16 | 1972-11-27 | ||
JPS5074128U (en) * | 1973-11-06 | 1975-06-28 | ||
JPS5027792Y1 (en) * | 1970-03-19 | 1975-08-18 | ||
JPS5029845Y1 (en) * | 1970-08-17 | 1975-09-02 |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5072730A (en) * | 1973-10-31 | 1975-06-16 | ||
JPS519938A (en) * | 1974-07-12 | 1976-01-27 | Hitachi Chemical Co Ltd |
-
1976
- 1976-11-12 JP JP51135926A patent/JPS589401B2/en not_active Expired
-
1977
- 1977-11-11 DE DE2750571A patent/DE2750571C3/en not_active Expired
- 1977-11-11 DE DE7734692U patent/DE7734692U1/en not_active Expired
- 1977-11-14 GB GB47254/77A patent/GB1595088A/en not_active Expired
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5027792Y1 (en) * | 1970-03-19 | 1975-08-18 | ||
JPS5029845Y1 (en) * | 1970-08-17 | 1975-09-02 | ||
JPS4727015U (en) * | 1971-02-16 | 1972-11-27 | ||
JPS5074128U (en) * | 1973-11-06 | 1975-06-28 |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3022732A1 (en) * | 1979-06-20 | 1981-01-15 | Asahi Optical Co Ltd | ZOOM LENS FOR A COPYING SYSTEM |
DE3022732C2 (en) * | 1979-06-20 | 1982-07-01 | Asahi Kogaku Kogyo K.K., Tokyo | Varifocal lens for copying purposes |
JPS5767909A (en) * | 1980-10-15 | 1982-04-24 | Canon Inc | Variable magnification optical system |
DE3544148A1 (en) * | 1984-12-13 | 1986-06-26 | Asahi Kogaku Kogyo K.K., Tokio/Tokyo | LENS FOR COPYING WITH VARIABLE IMAGE SIZE |
DE3544148C2 (en) * | 1984-12-13 | 1991-05-08 | Asahi Kogaku Kogyo K.K., Tokio/Tokyo, Jp |
Also Published As
Publication number | Publication date |
---|---|
JPS589401B2 (en) | 1983-02-21 |
GB1595088A (en) | 1981-08-05 |
DE7734692U1 (en) | 1978-03-02 |
DE2750571A1 (en) | 1978-05-24 |
DE2750571B2 (en) | 1981-06-25 |
DE2750571C3 (en) | 1982-03-04 |
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