JPS55156932A - Exposure control system - Google Patents
Exposure control systemInfo
- Publication number
- JPS55156932A JPS55156932A JP6463479A JP6463479A JPS55156932A JP S55156932 A JPS55156932 A JP S55156932A JP 6463479 A JP6463479 A JP 6463479A JP 6463479 A JP6463479 A JP 6463479A JP S55156932 A JPS55156932 A JP S55156932A
- Authority
- JP
- Japan
- Prior art keywords
- lamp
- mucpu
- illuminance
- radiated
- electric current
- 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)
- Control Of Exposure In Printing And Copying (AREA)
Abstract
PURPOSE:To maintain the illuinance of the radiated part constant by controlling the electric current an exposure lamp by the information relating to scanning such as scanning position or optical path length. CONSTITUTION:The quantity of light from an exposure lamp 11 is detected in a photo detecting part 15 and the output thereof is subjected to A/D conversion 21 and is stored in a RAM by a muCPU. Thence, the muCPU compares the content of the RAM with the assigned quantity of light and applies the instruction signal corresponding to the result of comparison to a control circuit 16. The control circuit 16 with the said instruction signal as a reference value controls the electric current of an exposure lamp 11. When a rotary mirror begins to rotate, the muCPU takes in the rotating position data from a rotating position detecting part 14 and operates the quantity of light of the lamp 11 of that time by the relations of the rotating angle of the mirror 12, the distance from the lamp 11 up to the radiated part 13, the electric current of the lamp 11 and the illuminance of the radiated part 13 so that the illuminance of the radiated part 13 becomes desired thereof, the illuminance of the radiated part 13 may be maintained constant.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP6463479A JPS55156932A (en) | 1979-05-25 | 1979-05-25 | Exposure control system |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP6463479A JPS55156932A (en) | 1979-05-25 | 1979-05-25 | Exposure control system |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS55156932A true JPS55156932A (en) | 1980-12-06 |
Family
ID=13263888
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP6463479A Pending JPS55156932A (en) | 1979-05-25 | 1979-05-25 | Exposure control system |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS55156932A (en) |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5182630A (en) * | 1975-01-16 | 1976-07-20 | Minolta Camera Kk | |
JPS53126924A (en) * | 1977-04-11 | 1978-11-06 | Ricoh Co Ltd | Control method for original document illumination of slit exposure copier |
-
1979
- 1979-05-25 JP JP6463479A patent/JPS55156932A/en active Pending
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5182630A (en) * | 1975-01-16 | 1976-07-20 | Minolta Camera Kk | |
JPS53126924A (en) * | 1977-04-11 | 1978-11-06 | Ricoh Co Ltd | Control method for original document illumination of slit exposure copier |
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