JPS5528068A - Optical device of copying machine - Google Patents
Optical device of copying machineInfo
- Publication number
- JPS5528068A JPS5528068A JP10159378A JP10159378A JPS5528068A JP S5528068 A JPS5528068 A JP S5528068A JP 10159378 A JP10159378 A JP 10159378A JP 10159378 A JP10159378 A JP 10159378A JP S5528068 A JPS5528068 A JP S5528068A
- Authority
- JP
- Japan
- Prior art keywords
- image
- original
- magnification
- image forming
- forming part
- 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.)
- Pending
Links
Landscapes
- Variable Magnification In Projection-Type Copying Machines (AREA)
Abstract
PURPOSE: To copy also the end parts of original image, when copying at magnification other than identical magnification, by causing the size of the original image to coincide with the size of the part excluding the non-image forming part of copying part, and causing the original reference end to coincide with the boundary of the non-image forming part and image forming part.
CONSTITUTION: A lens L is moved to positions of H, I, so that the original reference end of an original image 4 may be nearly the boundary of the non-image forming part and image forming part, regardless of the copying magnification. When the copying magnification is changed from n1 to n2, the lens L is moved to the photosensitive drum side by (a'2-a1), i.e., (1/n2-1/n1), in the direction of optical axis. In order to image the image of original reference end 4a in the boundary of the part forming the image avoiding the non-image forming part and the part not forming the image, the lens L is moved by Δl'12, i.e., (n1-n2)l1/(1+n2) in the direction vertical to the optical axis. (Where, l1 is the distance between the optical aixs position of the original and reference end part when the magnification is n1.)
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP10159378A JPS5528068A (en) | 1978-08-21 | 1978-08-21 | Optical device of copying machine |
GB7836048A GB2007376B (en) | 1977-09-09 | 1978-09-07 | Copier |
DE19782839240 DE2839240A1 (en) | 1977-09-09 | 1978-09-08 | COPY DEVICE |
US06/138,981 US4264198A (en) | 1977-09-09 | 1980-04-10 | Copier |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP10159378A JPS5528068A (en) | 1978-08-21 | 1978-08-21 | Optical device of copying machine |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5528068A true JPS5528068A (en) | 1980-02-28 |
Family
ID=14304672
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP10159378A Pending JPS5528068A (en) | 1977-09-09 | 1978-08-21 | Optical device of copying machine |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5528068A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4657380A (en) * | 1984-04-25 | 1987-04-14 | Minolta Camera Kabushiki Kaisha | Copying machine |
JPS636471U (en) * | 1986-06-30 | 1988-01-16 |
-
1978
- 1978-08-21 JP JP10159378A patent/JPS5528068A/en active Pending
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4657380A (en) * | 1984-04-25 | 1987-04-14 | Minolta Camera Kabushiki Kaisha | Copying machine |
JPS636471U (en) * | 1986-06-30 | 1988-01-16 |
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