JPS55164807A - Variable magnification optical device - Google Patents
Variable magnification optical deviceInfo
- Publication number
- JPS55164807A JPS55164807A JP7363479A JP7363479A JPS55164807A JP S55164807 A JPS55164807 A JP S55164807A JP 7363479 A JP7363479 A JP 7363479A JP 7363479 A JP7363479 A JP 7363479A JP S55164807 A JPS55164807 A JP S55164807A
- Authority
- JP
- Japan
- Prior art keywords
- mirror
- speed
- lens
- copying
- pulley
- 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
- Lenses (AREA)
- Variable Magnification In Projection-Type Copying Machines (AREA)
- Automatic Focus Adjustment (AREA)
Abstract
PURPOSE: To achieve the compactification and cost reduction of the device by suitably changing the focal length of an in-mirror lens along with the dislacement of the in-mirror lens holding base having the optical axis direction of the in-mirror lens as its moving components at the time of changing copying mangification.
CONSTITUTION: The optical drive wire 20 from one end 21 of a base 19 is inverted by a movable pulley 16, is wound by required number of turns on a drive pulley 17, and goes toward the driven pulley 18 on the opposite side. At the ordinary copying, the reversible revolutions of the drive pulley 17 cause the 1st mirror 11 and the 2nd mirror 12 to perform scanning parallel to an original platen 10 at the speed ratio of 2:1. At the varied magnfication, for example, at the scale-down, the table 19 displaces by the specified amount in the arrow A direction, causing the 2nd mirror 12 to displace in the same direction by half as much as that of the in-mirror lens 14. Also, the focal length of the lens 14 is suitably changed by the drive system. After this, the speed of the 1st reflecting mirror 11 and the 2nd reflecting mirror 12 becomes the speed inverse times the copying magnification as compared to that at the equal magnification, thus the scanning is done at a speed of 2:1. In this way, the compactification and cost reduction of the device are made possible.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP7363479A JPS55164807A (en) | 1979-06-11 | 1979-06-11 | Variable magnification optical device |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP7363479A JPS55164807A (en) | 1979-06-11 | 1979-06-11 | Variable magnification optical device |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS55164807A true JPS55164807A (en) | 1980-12-22 |
Family
ID=13523928
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP7363479A Pending JPS55164807A (en) | 1979-06-11 | 1979-06-11 | Variable magnification optical device |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS55164807A (en) |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5410741A (en) * | 1977-06-25 | 1979-01-26 | Ishida Sangyo Kk | Electrostatic copier |
-
1979
- 1979-06-11 JP JP7363479A patent/JPS55164807A/en active Pending
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5410741A (en) * | 1977-06-25 | 1979-01-26 | Ishida Sangyo Kk | Electrostatic copier |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
EP0355640A3 (en) | Focal length changeable camera | |
JPS5284754A (en) | Variable focal length lens | |
JPS5365736A (en) | Variable magnification copier | |
ES464536A1 (en) | Focal adjustment on a single-focus lens in a continuously variable magnification system | |
ES433201A1 (en) | Lens selection device | |
JPS55164807A (en) | Variable magnification optical device | |
JPS5374025A (en) | Magnefication change device for exposure optical system | |
JPS5391747A (en) | Copier | |
GB2160668B (en) | Focal position adjusting device for small variable magnification type copying machine with zoom lens | |
JPS5642758A (en) | Variable speed moving device | |
JPS57188068A (en) | Variable magnification optical system for copying machine | |
JPS6425112A (en) | Dynamic type zoom device | |
JPS5711570A (en) | Picture reader | |
JPS5659264A (en) | Original scanner | |
JPS5589867A (en) | Variable power exposure optical system in copying machine | |
JPS5621158A (en) | Copying apparatus | |
JPS59125720A (en) | Device for converting magnification of image of copying machine | |
JPS57188067A (en) | Optical system with variable magnification for copying machine | |
JPS57185061A (en) | Copying device with variable magnification | |
JPS57157270A (en) | Scanning type image forming device | |
JPS56147117A (en) | Optical scanner | |
JPS55126262A (en) | Magnification changing device of copying machine | |
JPS55137550A (en) | Optical scanner | |
JPS54155846A (en) | Exposure optical system in variable power copying apparatus | |
JPS5654408A (en) | Zoom lens barrel that permits close-up photographing |