JPS5688577A - Output controller of laser printer - Google Patents

Output controller of laser printer

Info

Publication number
JPS5688577A
JPS5688577A JP16670879A JP16670879A JPS5688577A JP S5688577 A JPS5688577 A JP S5688577A JP 16670879 A JP16670879 A JP 16670879A JP 16670879 A JP16670879 A JP 16670879A JP S5688577 A JPS5688577 A JP S5688577A
Authority
JP
Japan
Prior art keywords
laser
output
supplied
peak value
information signal
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
JP16670879A
Other languages
Japanese (ja)
Inventor
Isamu Shibata
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 JP16670879A priority Critical patent/JPS5688577A/en
Publication of JPS5688577A publication Critical patent/JPS5688577A/en
Pending legal-status Critical Current

Links

Abstract

PURPOSE: To eneble to prevent a laser output from fluctuating by controlling an information signal to be supplied to a laser driver on the basis of the variation in the peak value of the laser output.
CONSTITUTION: Gate signal (c) is supplied to gate circuit 12 to supply the output of photodetector 3 to peak holding circuit 13. Peak holding circuit 13 holds and supplies peak value (a) of the output of photodetector 3 to information signal amplifier 11, whose gain is controlled. Gate circuit 14, once supplied with gate signal (b), supplies the output of comparator 5 to laser driver 1 to set and control a direct current to be supplied to semiconductor laser 2. Thus, the magnitude of the information signal to be supplied to laser driver 1 is controlled on the basis of the peak value variation of the laser output to stabilize the laser output. Consequently, even if characteristics fluctuate or vary with elements owing to the secular change of the laser element, the invariably constant laser output can be obtained.
COPYRIGHT: (C)1981,JPO&Japio
JP16670879A 1979-12-21 1979-12-21 Output controller of laser printer Pending JPS5688577A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP16670879A JPS5688577A (en) 1979-12-21 1979-12-21 Output controller of laser printer

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP16670879A JPS5688577A (en) 1979-12-21 1979-12-21 Output controller of laser printer

Publications (1)

Publication Number Publication Date
JPS5688577A true JPS5688577A (en) 1981-07-18

Family

ID=15836279

Family Applications (1)

Application Number Title Priority Date Filing Date
JP16670879A Pending JPS5688577A (en) 1979-12-21 1979-12-21 Output controller of laser printer

Country Status (1)

Country Link
JP (1) JPS5688577A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4647950A (en) * 1984-05-07 1987-03-03 Kabushiki Kaisha Toshiba Recording apparatus

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4647950A (en) * 1984-05-07 1987-03-03 Kabushiki Kaisha Toshiba Recording apparatus

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