JPS5675674A - Exposure projecting device - Google Patents
Exposure projecting deviceInfo
- Publication number
- JPS5675674A JPS5675674A JP15245479A JP15245479A JPS5675674A JP S5675674 A JPS5675674 A JP S5675674A JP 15245479 A JP15245479 A JP 15245479A JP 15245479 A JP15245479 A JP 15245479A JP S5675674 A JPS5675674 A JP S5675674A
- Authority
- JP
- Japan
- Prior art keywords
- mirror
- projection lens
- optical axis
- displacement
- steps
- 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)
- Exposure Or Original Feeding In Electrophotography (AREA)
Abstract
PURPOSE:To make it possible to vary the contraction scale ratio of the projection optical image without steps and make the device small-size, by providing the second mirror form control mechanism which changes the angle of the second mirror, which projects the light from the first mirror, for the optical axis. CONSTITUTION:A projection lens displacement mechanism is provided which displaces projection lens 5 along optical axis L2 of lens 5 without steps, and the second mirror form control mechanism which displaces the second mirror 6 along optical axis L2 of lens 5 and changes the angle of the second mirror 6 for optical axis L2 is so provided that displacement of the focus position generated by displacement of projection lens 5 dependent upon the projection lens displacement mechanism may be compensated. A helicoid mechanism or the like is most suitable as the projection lens displacement mechanism, and this displacement mechanism and the second mirror form control mechanism are interlocked with each other, as a result, the construction scale ratio can be varied without steps, and the occupation space can be small to make the device small-size.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP15245479A JPS5675674A (en) | 1979-11-27 | 1979-11-27 | Exposure projecting device |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP15245479A JPS5675674A (en) | 1979-11-27 | 1979-11-27 | Exposure projecting device |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5675674A true JPS5675674A (en) | 1981-06-22 |
Family
ID=15540865
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP15245479A Pending JPS5675674A (en) | 1979-11-27 | 1979-11-27 | Exposure projecting device |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5675674A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5918941A (en) * | 1982-07-23 | 1984-01-31 | Mita Ind Co Ltd | Optical device of electrostatic copying machine capable of variable power copying |
-
1979
- 1979-11-27 JP JP15245479A patent/JPS5675674A/en active Pending
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5918941A (en) * | 1982-07-23 | 1984-01-31 | Mita Ind Co Ltd | Optical device of electrostatic copying machine capable of variable power copying |
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