JPS55100524A - Oscillating mirror drive device - Google Patents

Oscillating mirror drive device

Info

Publication number
JPS55100524A
JPS55100524A JP841479A JP841479A JPS55100524A JP S55100524 A JPS55100524 A JP S55100524A JP 841479 A JP841479 A JP 841479A JP 841479 A JP841479 A JP 841479A JP S55100524 A JPS55100524 A JP S55100524A
Authority
JP
Japan
Prior art keywords
oscillation
oscillating mirror
reference signal
detecting sensor
variable capacitor
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
JP841479A
Other languages
Japanese (ja)
Inventor
Takashi Inoue
Narimoto Tenmiyo
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 JP841479A priority Critical patent/JPS55100524A/en
Publication of JPS55100524A publication Critical patent/JPS55100524A/en
Pending legal-status Critical Current

Links

Landscapes

  • Mechanical Optical Scanning Systems (AREA)
  • Optical Systems Of Projection Type Copiers (AREA)

Abstract

PURPOSE: To achieve higher accuracy of control by using a variable capacitor as the rotation detecting sensor of the oscillating mirror.
CONSTITUTION: The rotation detecting sensor of an oscillating mirror 1 which is oscillated by a moving coil type arc motor 4 via oscillating arm 3 with fulcrum axes 2, 2' as fulcrums is made as a variable capacitor 11 consisting of the 1st, 2nd electrode plates 9, 10. Then, along with the oscillation of the oscillating mirror 1, the opposing area between the 1st electrode plate 9 and 2nd electrode plate 10, hence electrostatic capacity, changes to cause an oscillation circuit 13 to continously vary the oscillation frequency according the amount of oscillation, thence the signal V0 is outputted from a zero cross circuit 14 to a differential amplifier 19 via low- pass filter 17 and according to the difference from the reference signal from a reference signal generating circuit 18 and its polarity, an arc motor 4 is driven, whereby highly accurate control is accomplished.
COPYRIGHT: (C)1980,JPO&Japio
JP841479A 1979-01-27 1979-01-27 Oscillating mirror drive device Pending JPS55100524A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP841479A JPS55100524A (en) 1979-01-27 1979-01-27 Oscillating mirror drive device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP841479A JPS55100524A (en) 1979-01-27 1979-01-27 Oscillating mirror drive device

Publications (1)

Publication Number Publication Date
JPS55100524A true JPS55100524A (en) 1980-07-31

Family

ID=11692474

Family Applications (1)

Application Number Title Priority Date Filing Date
JP841479A Pending JPS55100524A (en) 1979-01-27 1979-01-27 Oscillating mirror drive device

Country Status (1)

Country Link
JP (1) JPS55100524A (en)

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