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JPS545323A - Compensating unit for light source output variation - Google Patents

Compensating unit for light source output variation

Info

Publication number
JPS545323A
JPS545323A JP7020877A JP7020877A JPS545323A JP S545323 A JPS545323 A JP S545323A JP 7020877 A JP7020877 A JP 7020877A JP 7020877 A JP7020877 A JP 7020877A JP S545323 A JPS545323 A JP S545323A
Authority
JP
Japan
Prior art keywords
light source
output variation
source output
compensating unit
variation
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
Application number
JP7020877A
Other languages
Japanese (ja)
Inventor
Mamoru Maeda
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 JP7020877A priority Critical patent/JPS545323A/en
Publication of JPS545323A publication Critical patent/JPS545323A/en
Pending legal-status Critical Current

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Abstract

PURPOSE: To compansate the level variation of video signal without using complicated operation circuits, by detecting the output variation of a light source and by compensating the video signal with this detection signal, in a manuscript reader.
COPYRIGHT: (C)1979,JPO&Japio
JP7020877A 1977-06-14 1977-06-14 Compensating unit for light source output variation Pending JPS545323A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP7020877A JPS545323A (en) 1977-06-14 1977-06-14 Compensating unit for light source output variation

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP7020877A JPS545323A (en) 1977-06-14 1977-06-14 Compensating unit for light source output variation

Publications (1)

Publication Number Publication Date
JPS545323A true JPS545323A (en) 1979-01-16

Family

ID=13424868

Family Applications (1)

Application Number Title Priority Date Filing Date
JP7020877A Pending JPS545323A (en) 1977-06-14 1977-06-14 Compensating unit for light source output variation

Country Status (1)

Country Link
JP (1) JPS545323A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5725774A (en) * 1980-07-23 1982-02-10 Ricoh Co Ltd Processing circuit of light volume detection signal for solid state scanner
WO2014024623A1 (en) * 2012-08-10 2014-02-13 三菱電機株式会社 Contact image sensor, output correction device for contact image sensor, and output correction method for contact image sensor

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5725774A (en) * 1980-07-23 1982-02-10 Ricoh Co Ltd Processing circuit of light volume detection signal for solid state scanner
JPH0147945B2 (en) * 1980-07-23 1989-10-17 Ricoh Kk
WO2014024623A1 (en) * 2012-08-10 2014-02-13 三菱電機株式会社 Contact image sensor, output correction device for contact image sensor, and output correction method for contact image sensor
JP2014036405A (en) * 2012-08-10 2014-02-24 Mitsubishi Electric Corp Contact image sensor, output correction device for contact image sensor and output correction method for contact image sensor
US9516193B2 (en) 2012-08-10 2016-12-06 Mitsubishi Electric Corporation Contact image sensor, output correction device for contact image sensor, and output correction method for contact image sensor

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