JPS5495242A - Adjusting method of quantity of exposure light of photoreceptor in copying machine having original reading function - Google Patents
Adjusting method of quantity of exposure light of photoreceptor in copying machine having original reading functionInfo
- Publication number
- JPS5495242A JPS5495242A JP211478A JP211478A JPS5495242A JP S5495242 A JPS5495242 A JP S5495242A JP 211478 A JP211478 A JP 211478A JP 211478 A JP211478 A JP 211478A JP S5495242 A JPS5495242 A JP S5495242A
- Authority
- JP
- Japan
- Prior art keywords
- original
- light
- photoreceptor
- image sensor
- exposure light
- 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
- Facsimile Scanning Arrangements (AREA)
- Exposure Or Original Feeding In Electrophotography (AREA)
- Optical Systems Of Projection Type Copiers (AREA)
- Control Of Exposure In Printing And Copying (AREA)
- Control Or Security For Electrophotography (AREA)
Abstract
PURPOSE:To readily and accurately adjust the quantity of exposure light of a photoreceptor automatically by detecting part of the original exposure scanning light with an image sensor, comparing the same with a specified set voltage in a comparator and controlling the quantity of light emission of an original lighting lamp. CONSTITUTION:The original O is radiated by radiating light of an original lighting lamp 3-1. The exposure scanning light through reflection from the original O exposes a photosensitive drum 1 and part thereof is received in an image sensor 12. The maximum detection output voltage of this image sensor 12 is compared with the set voltage of a comparator 16 via signal processing circuit 15. This causes the quantity of the lamp 3-1 to be automatically adjusted by the comparison output outputted by the circuit 16 according to the maximum detection output voltage of the image sensor 12 corresponding to the intensity of the reflected light from the ground part of the original. As a result, the quantity of exposure light of the photoreceptor is automatically adjusted with ease and accuracy, whereby good quality images are formed.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP53002114A JPS6026206B2 (en) | 1978-01-12 | 1978-01-12 | Method for adjusting photoreceptor exposure light amount in a copying machine with original reading function |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP53002114A JPS6026206B2 (en) | 1978-01-12 | 1978-01-12 | Method for adjusting photoreceptor exposure light amount in a copying machine with original reading function |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS5495242A true JPS5495242A (en) | 1979-07-27 |
JPS6026206B2 JPS6026206B2 (en) | 1985-06-22 |
Family
ID=11520317
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP53002114A Expired JPS6026206B2 (en) | 1978-01-12 | 1978-01-12 | Method for adjusting photoreceptor exposure light amount in a copying machine with original reading function |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS6026206B2 (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6087565A (en) * | 1983-10-19 | 1985-05-17 | Fuji Photo Film Co Ltd | Picture scanning reading method |
JPS61189579A (en) * | 1985-02-19 | 1986-08-23 | Sharp Corp | Exposure adjusting device for copying machine |
JPS61277980A (en) * | 1985-06-03 | 1986-12-08 | Canon Inc | Image forming device |
-
1978
- 1978-01-12 JP JP53002114A patent/JPS6026206B2/en not_active Expired
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6087565A (en) * | 1983-10-19 | 1985-05-17 | Fuji Photo Film Co Ltd | Picture scanning reading method |
JPS61189579A (en) * | 1985-02-19 | 1986-08-23 | Sharp Corp | Exposure adjusting device for copying machine |
JPS61277980A (en) * | 1985-06-03 | 1986-12-08 | Canon Inc | Image forming device |
Also Published As
Publication number | Publication date |
---|---|
JPS6026206B2 (en) | 1985-06-22 |
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