JPS6479740A - Exposure adjusting device - Google Patents
Exposure adjusting deviceInfo
- Publication number
- JPS6479740A JPS6479740A JP23779987A JP23779987A JPS6479740A JP S6479740 A JPS6479740 A JP S6479740A JP 23779987 A JP23779987 A JP 23779987A JP 23779987 A JP23779987 A JP 23779987A JP S6479740 A JPS6479740 A JP S6479740A
- Authority
- JP
- Japan
- Prior art keywords
- original
- lamp
- impressed
- voltage
- exposure
- 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
- Exposure Or Original Feeding In Electrophotography (AREA)
- Light Sources And Details Of Projection-Printing Devices (AREA)
- Control Of Exposure In Printing And Copying (AREA)
Abstract
PURPOSE:To adjust exposure with small noise without influencing other equipment by constituting a light source of a large scale lamp and a small scale lamp and controlling a voltage impressed on the small scale lamp in terms of phase based on the illuminance of an original. CONSTITUTION:The lamps 28 and 30, on which the voltage is impressed from a light source part 32, are lighted and the light is radiated to the original 16 through a slit 10. At such a time, the illuminance of the original at the time when the lamps 28 and 30 irradiate the original 16 is varied according to the variation of the impressed voltage. Then, the reflected light from the original 16, that is, the exposure to the film is varied. Supposing that the lamp 28 is the small scale lamp, the voltage impressed on the lamp 28 is controlled in terms of phase based on the illuminance of the original detected by a detector 40 by means of a control part 36. Thus, the noise which is caused at the time of executing the control of phase splitting are reduced and the exposure can be adjusted without influencing other equipment.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP23779987A JPS6479740A (en) | 1987-09-22 | 1987-09-22 | Exposure adjusting device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP23779987A JPS6479740A (en) | 1987-09-22 | 1987-09-22 | Exposure adjusting device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6479740A true JPS6479740A (en) | 1989-03-24 |
Family
ID=17020590
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP23779987A Pending JPS6479740A (en) | 1987-09-22 | 1987-09-22 | Exposure adjusting device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6479740A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5206190A (en) * | 1990-09-04 | 1993-04-27 | Aluminum Company Of America | Dielectric composition containing cordierite and glass |
-
1987
- 1987-09-22 JP JP23779987A patent/JPS6479740A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5206190A (en) * | 1990-09-04 | 1993-04-27 | Aluminum Company Of America | Dielectric composition containing cordierite and glass |
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