JPS5566064A - Original reader - Google Patents

Original reader

Info

Publication number
JPS5566064A
JPS5566064A JP14002878A JP14002878A JPS5566064A JP S5566064 A JPS5566064 A JP S5566064A JP 14002878 A JP14002878 A JP 14002878A JP 14002878 A JP14002878 A JP 14002878A JP S5566064 A JPS5566064 A JP S5566064A
Authority
JP
Japan
Prior art keywords
signal
lamp
light quantity
original
speed
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
JP14002878A
Other languages
Japanese (ja)
Other versions
JPS6122348B2 (en
Inventor
Shinji Miura
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 JP14002878A priority Critical patent/JPS5566064A/en
Publication of JPS5566064A publication Critical patent/JPS5566064A/en
Publication of JPS6122348B2 publication Critical patent/JPS6122348B2/ja
Granted legal-status Critical Current

Links

Landscapes

  • Character Input (AREA)
  • Image Input (AREA)

Abstract

PURPOSE: To read an original well by changing the light quantity of the lamp, which irradiates the original surface, by speed signals obtained by differentiating timing signals at a sub-scanning time and eliminating the fluctuation of the image sensor output level dependent upon the fluctuation of a photoelectric conversion time.
CONSTITUTION: Timing signal a is amplified by 21 and is subjected to time differentiating circuit 22 to output differentiated signal b having the amplitude according the speed and the phase advanced by 90°, and signal c obtained by rectifying signal b by 23 is supplied to amplification driving circuit 24 for lamp, thereby changing the light quantity of lamp 12. As a result, the same light quantity product is given to CCD image sensor 14 even if the movement speed for sub-scanning is changed, so that an original can be read well.
COPYRIGHT: (C)1980,JPO&Japio
JP14002878A 1978-11-14 1978-11-14 Original reader Granted JPS5566064A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP14002878A JPS5566064A (en) 1978-11-14 1978-11-14 Original reader

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP14002878A JPS5566064A (en) 1978-11-14 1978-11-14 Original reader

Publications (2)

Publication Number Publication Date
JPS5566064A true JPS5566064A (en) 1980-05-19
JPS6122348B2 JPS6122348B2 (en) 1986-05-31

Family

ID=15259266

Family Applications (1)

Application Number Title Priority Date Filing Date
JP14002878A Granted JPS5566064A (en) 1978-11-14 1978-11-14 Original reader

Country Status (1)

Country Link
JP (1) JPS5566064A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57170116U (en) * 1981-04-17 1982-10-26
JPS60254283A (en) * 1984-05-30 1985-12-14 Tokyo Erekutoron Kk Pattern reader
JPS6152781A (en) * 1984-08-23 1986-03-15 Sumitomo Electric Ind Ltd Light quantity control type optical character reader
JPS6162981A (en) * 1984-09-05 1986-03-31 Sumitomo Electric Ind Ltd Optical character reader of light quantity control type

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57170116U (en) * 1981-04-17 1982-10-26
JPS60254283A (en) * 1984-05-30 1985-12-14 Tokyo Erekutoron Kk Pattern reader
JPH0521272B2 (en) * 1984-05-30 1993-03-23 Tokyo Electron Ltd
JPS6152781A (en) * 1984-08-23 1986-03-15 Sumitomo Electric Ind Ltd Light quantity control type optical character reader
JPS6162981A (en) * 1984-09-05 1986-03-31 Sumitomo Electric Ind Ltd Optical character reader of light quantity control type

Also Published As

Publication number Publication date
JPS6122348B2 (en) 1986-05-31

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