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 function

Info

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
Application number
JP211478A
Other languages
Japanese (ja)
Other versions
JPS6026206B2 (en
Inventor
Toshiyuki Iguchi
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Ricoh Co Ltd
Original Assignee
Ricoh Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Ricoh Co Ltd filed Critical Ricoh Co Ltd
Priority to JP53002114A priority Critical patent/JPS6026206B2/en
Publication of JPS5495242A publication Critical patent/JPS5495242A/en
Publication of JPS6026206B2 publication Critical patent/JPS6026206B2/en
Expired legal-status Critical Current

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.
JP53002114A 1978-01-12 1978-01-12 Method for adjusting photoreceptor exposure light amount in a copying machine with original reading function Expired JPS6026206B2 (en)

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)

* Cited by examiner, † Cited by third party
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

Cited By (3)

* Cited by examiner, † Cited by third party
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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