JPS5583037A - Exposure correcting device - Google Patents
Exposure correcting deviceInfo
- Publication number
- JPS5583037A JPS5583037A JP15839078A JP15839078A JPS5583037A JP S5583037 A JPS5583037 A JP S5583037A JP 15839078 A JP15839078 A JP 15839078A JP 15839078 A JP15839078 A JP 15839078A JP S5583037 A JPS5583037 A JP S5583037A
- Authority
- JP
- Japan
- Prior art keywords
- copying
- lens
- original
- light
- magnification
- 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
- 230000004907 flux Effects 0.000 abstract 2
- 230000000694 effects Effects 0.000 abstract 1
- 230000003287 optical effect Effects 0.000 abstract 1
Landscapes
- Variable Magnification In Projection-Type Copying Machines (AREA)
Abstract
PURPOSE: To make the exposure distribution in each copying magnification correct with a simple constitution by partly shutting off part of the specific magnification copying luminous flux with shield plates.
CONSTITUTION: At the equal magnification copying, the set reference end (a) of the original 2 is formed at the reference end (b) of copying paper 3 by a lens 1 in the position L1 and the other end (a') of the original 2 is imaged at the other end (b') of the copying pager 3, thus the projection image of equally distributed quantity of light is formed. When variable power copying is done by moving the lens 1 diagonally backward, the shield plates 7, 8 which do not give any effect to the optical path at the equal magnification copying move from the position S1 to the position S2 cooperatively with the movement of the lens 1, by which part of the end part luminous flux is shut off and the quantity of light to the reference end (c) and other end (c') of the transfer paper 4 where the quantity of light is larger is controlled in correspondence to the reference end (a) and other end (a') of the original 2, whereby the exposure distribution to the copying paper 4 is evened with the simple constitution.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15839078A JPS5583037A (en) | 1978-12-18 | 1978-12-18 | Exposure correcting device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15839078A JPS5583037A (en) | 1978-12-18 | 1978-12-18 | Exposure correcting device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS5583037A true JPS5583037A (en) | 1980-06-23 |
Family
ID=15670673
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP15839078A Pending JPS5583037A (en) | 1978-12-18 | 1978-12-18 | Exposure correcting device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5583037A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS57104953A (en) * | 1980-12-22 | 1982-06-30 | Ricoh Co Ltd | Exposure method of variable power copying machine |
| JPS58160967A (en) * | 1982-03-19 | 1983-09-24 | Matsushita Electric Ind Co Ltd | Variable power copying machine |
| JPS59166236U (en) * | 1983-04-20 | 1984-11-07 | ミノルタ株式会社 | Light distribution correction device |
-
1978
- 1978-12-18 JP JP15839078A patent/JPS5583037A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS57104953A (en) * | 1980-12-22 | 1982-06-30 | Ricoh Co Ltd | Exposure method of variable power copying machine |
| JPS58160967A (en) * | 1982-03-19 | 1983-09-24 | Matsushita Electric Ind Co Ltd | Variable power copying machine |
| JPS59166236U (en) * | 1983-04-20 | 1984-11-07 | ミノルタ株式会社 | Light distribution correction device |
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