JPS5689712A - Self-resonant photoscanner - Google Patents

Self-resonant photoscanner

Info

Publication number
JPS5689712A
JPS5689712A JP16656979A JP16656979A JPS5689712A JP S5689712 A JPS5689712 A JP S5689712A JP 16656979 A JP16656979 A JP 16656979A JP 16656979 A JP16656979 A JP 16656979A JP S5689712 A JPS5689712 A JP S5689712A
Authority
JP
Japan
Prior art keywords
circuit
self
signal generating
oscillator
generating circuit
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
JP16656979A
Other languages
Japanese (ja)
Inventor
Takayuki Shirasaki
Kaoru Seto
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.)
Canon Inc
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 JP16656979A priority Critical patent/JPS5689712A/en
Publication of JPS5689712A publication Critical patent/JPS5689712A/en
Pending legal-status Critical Current

Links

Abstract

PURPOSE: To prevent break of the oscillator due to overswing just after starting, by adding circuit to the oscillating circuit and by connecting signal generating circuit to the adding circuit and by giving a constitution where the oscillator is oscillated with separate excitation by the signal generated from the signal generating circuit at the start time and continues oscillation with self-excitation after start.
CONSTITUTION: Adding circuit ADD is added to the oscillating circuit of the conventional known positive feedback loop constituted with the scanner and the AGC control amplifier, and signal generating circuit STA is connected to circuit ADD. The gain of the circuit loop is adjusted to approximately 1 where self-resonance can be continued. When electric power is supplied, a single pulse is generated from signal generating circuit STA after a prescribed time, and driving coil SOL of the scanner is triggerred through adding circuit ADD and is operated. An induced voltage is generated in detection coil DET and is fed back positively to the control amplifier. The AGC outputs a voltage to make the amplitude of the oscillator constant, and thus, self-resonant oscillation is continued. Consequently, break of the oscillator due to overswing just after starting is prevented.
COPYRIGHT: (C)1981,JPO&Japio
JP16656979A 1979-12-21 1979-12-21 Self-resonant photoscanner Pending JPS5689712A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP16656979A JPS5689712A (en) 1979-12-21 1979-12-21 Self-resonant photoscanner

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP16656979A JPS5689712A (en) 1979-12-21 1979-12-21 Self-resonant photoscanner

Publications (1)

Publication Number Publication Date
JPS5689712A true JPS5689712A (en) 1981-07-21

Family

ID=15833685

Family Applications (1)

Application Number Title Priority Date Filing Date
JP16656979A Pending JPS5689712A (en) 1979-12-21 1979-12-21 Self-resonant photoscanner

Country Status (1)

Country Link
JP (1) JPS5689712A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59195218A (en) * 1983-04-20 1984-11-06 Nippon Teresukomu Kk Resonance type scanner with phase controller
JP2002228966A (en) * 2001-01-31 2002-08-14 Olympus Optical Co Ltd Laser beam scanner

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5439140A (en) * 1978-05-22 1979-03-26 Jeol Ltd Optical scanner

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5439140A (en) * 1978-05-22 1979-03-26 Jeol Ltd Optical scanner

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59195218A (en) * 1983-04-20 1984-11-06 Nippon Teresukomu Kk Resonance type scanner with phase controller
JPH0548453B2 (en) * 1983-04-20 1993-07-21 Shimosa Chukei
JP2002228966A (en) * 2001-01-31 2002-08-14 Olympus Optical Co Ltd Laser beam scanner

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