JPS6125363A - Beam position detector - Google Patents

Beam position detector

Info

Publication number
JPS6125363A
JPS6125363A JP14617784A JP14617784A JPS6125363A JP S6125363 A JPS6125363 A JP S6125363A JP 14617784 A JP14617784 A JP 14617784A JP 14617784 A JP14617784 A JP 14617784A JP S6125363 A JPS6125363 A JP S6125363A
Authority
JP
Japan
Prior art keywords
pulse width
time
counter
pulse
picture recording
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
JP14617784A
Other languages
Japanese (ja)
Inventor
Yutaka Endo
Original Assignee
Canon Inc
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 Canon Inc filed Critical Canon Inc
Priority to JP14617784A priority Critical patent/JPS6125363A/en
Publication of JPS6125363A publication Critical patent/JPS6125363A/en
Pending legal-status Critical Current

Links

Abstract

PURPOSE: To obtain an accurate picture recording start position with no adjustment by measuring a pulse width after waveform shaping and using a time when a 1/2 time of the pulse width measured before is elapsed as a picture recording start time after a prescribed time is elapsed from the said measurement.
CONSTITUTION: An input signal subjected to beam detection 5 is pulse-waveform- shaped by an amplifier/waveform shaping circuit 6 and the pulse is measured by a counter 20 based on the rise of an output pulse Vp. The pulse Vp is inputted to a pulse width measuring device 21 at the same time to obtain the pulse width and a 1/2 of the pulse width is inputted to the counter 22. Then the counter 20 outputs a start signal to the counter 22 after the time Tc. Thus, the counter 22 starts the measurement of 1/2 of the measured pulse width and transmits a picture recording start signal to a picture recording controller at the same time when the measurement is finished to start the write of a picture.
COPYRIGHT: (C)1986,JPO&Japio
JP14617784A 1984-07-14 1984-07-14 Beam position detector Pending JPS6125363A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP14617784A JPS6125363A (en) 1984-07-14 1984-07-14 Beam position detector

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP14617784A JPS6125363A (en) 1984-07-14 1984-07-14 Beam position detector

Publications (1)

Publication Number Publication Date
JPS6125363A true JPS6125363A (en) 1986-02-04

Family

ID=15401875

Family Applications (1)

Application Number Title Priority Date Filing Date
JP14617784A Pending JPS6125363A (en) 1984-07-14 1984-07-14 Beam position detector

Country Status (1)

Country Link
JP (1) JPS6125363A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH02119132U (en) * 1989-03-10 1990-09-26
DE4024463A1 (en) * 1989-08-01 1991-02-07 Ricoh Kk DEVICE FOR DETECTING A LASER BEAM SENSING POSITION
JPH0480447U (en) * 1990-11-22 1992-07-14
JP2016109734A (en) * 2014-12-02 2016-06-20 キヤノン株式会社 Scanning optical device and image forming apparatus

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS53122331A (en) * 1977-04-01 1978-10-25 Fujitsu Ltd Synchronous control system for scanned light beam

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS53122331A (en) * 1977-04-01 1978-10-25 Fujitsu Ltd Synchronous control system for scanned light beam

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH02119132U (en) * 1989-03-10 1990-09-26
DE4024463A1 (en) * 1989-08-01 1991-02-07 Ricoh Kk DEVICE FOR DETECTING A LASER BEAM SENSING POSITION
JPH0480447U (en) * 1990-11-22 1992-07-14
JP2016109734A (en) * 2014-12-02 2016-06-20 キヤノン株式会社 Scanning optical device and image forming apparatus

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