JPS5474733A - Positioning device for moving optical system of optical device of copying machines - Google Patents
Positioning device for moving optical system of optical device of copying machinesInfo
- Publication number
- JPS5474733A JPS5474733A JP14154677A JP14154677A JPS5474733A JP S5474733 A JPS5474733 A JP S5474733A JP 14154677 A JP14154677 A JP 14154677A JP 14154677 A JP14154677 A JP 14154677A JP S5474733 A JPS5474733 A JP S5474733A
- Authority
- JP
- Japan
- Prior art keywords
- mirror
- optical system
- moved
- moving
- lens
- 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
Landscapes
- Variable Magnification In Projection-Type Copying Machines (AREA)
Abstract
PURPOSE: To provide an accurate positioning device which permits adjustment of relative positions of the optical system even after assembling by moving an in-mirror lens and a mirror respectively for specified quantities by way of nuts of different pitches thereby changing their optical path lengths.
CONSTITUTION: When a driving screw shaft 28 is turned by a motor 37, nuts 31, 32 are moved for different distances according to variable powers by means of screws 29, 30 of different pitches. These movements are transmitted by means of rods 24, 24 and 25, 25 to support frames 12, 13, by which an in-mirror lens 4 including a reflecting mirror and a mirror 6 are moved, whereby the variable power latent images on a photosensitive drum by specified changes of the exposure optical path length are formed. If these rods 24, 24 and 25, 25 are moved by pressing a spring 27 and the nut 31 or 32 is turned, then the initial position of the lens 4 and mirror 6 are adjusted even after assembling, thus the positioning of the moving optical system at the changing of magnification may be performed accurately with the constitution of not requiring high accuracy.
COPYRIGHT: (C)1979,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP14154677A JPS5474733A (en) | 1977-11-28 | 1977-11-28 | Positioning device for moving optical system of optical device of copying machines |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP14154677A JPS5474733A (en) | 1977-11-28 | 1977-11-28 | Positioning device for moving optical system of optical device of copying machines |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS5474733A true JPS5474733A (en) | 1979-06-15 |
JPS6113212B2 JPS6113212B2 (en) | 1986-04-12 |
Family
ID=15294473
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP14154677A Granted JPS5474733A (en) | 1977-11-28 | 1977-11-28 | Positioning device for moving optical system of optical device of copying machines |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5474733A (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS57173858A (en) * | 1981-04-20 | 1982-10-26 | Fuji Xerox Co Ltd | Scale factor adjusting device of copier |
JPS5915227A (en) * | 1982-07-17 | 1984-01-26 | Canon Inc | Infinite focusing mechanism of variable focus camera |
JPS59176008U (en) * | 1983-05-10 | 1984-11-24 | キヤノン株式会社 | Camera focal length variable device |
-
1977
- 1977-11-28 JP JP14154677A patent/JPS5474733A/en active Granted
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS57173858A (en) * | 1981-04-20 | 1982-10-26 | Fuji Xerox Co Ltd | Scale factor adjusting device of copier |
JPH0119570B2 (en) * | 1981-04-20 | 1989-04-12 | Fuji Xerox Co Ltd | |
JPS5915227A (en) * | 1982-07-17 | 1984-01-26 | Canon Inc | Infinite focusing mechanism of variable focus camera |
JPS59176008U (en) * | 1983-05-10 | 1984-11-24 | キヤノン株式会社 | Camera focal length variable device |
JPS6347865Y2 (en) * | 1983-05-10 | 1988-12-09 |
Also Published As
Publication number | Publication date |
---|---|
JPS6113212B2 (en) | 1986-04-12 |
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