JPS6432429A - Light spot speed controller - Google Patents

Light spot speed controller

Info

Publication number
JPS6432429A
JPS6432429A JP18819087A JP18819087A JPS6432429A JP S6432429 A JPS6432429 A JP S6432429A JP 18819087 A JP18819087 A JP 18819087A JP 18819087 A JP18819087 A JP 18819087A JP S6432429 A JPS6432429 A JP S6432429A
Authority
JP
Japan
Prior art keywords
speed
light spot
signal
error signal
stably
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
JP18819087A
Other languages
Japanese (ja)
Inventor
Kazuhisa Yukimura
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.)
NEC Corp
Original Assignee
NEC Corp
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 NEC Corp filed Critical NEC Corp
Priority to JP18819087A priority Critical patent/JPS6432429A/en
Publication of JPS6432429A publication Critical patent/JPS6432429A/en
Pending legal-status Critical Current

Links

Landscapes

  • Moving Of Head For Track Selection And Changing (AREA)
  • Moving Of The Head For Recording And Reproducing By Optical Means (AREA)

Abstract

PURPOSE:To move a light spot at high speed and stably by moving it, while controlling the speed of the light spot in accordance with a reference speed signal set in advance, in case of moving the light spot to a target track from the present track on the surface of a recording medium. CONSTITUTION:At the time of detecting the speed of a light spot 3, a speed signal output 20 of the light spot 3, and a ripple component of a speed error signal 29 which has subtracted 7 a speed signal 24 from a reference speed signal 22 are reduced by obtaining the speed signal 24 by setting the characteristic of a filter 10. The light spot 3 at the time of controlling speed is moved so that a speed of the light spot 3 follows up the reference speed 22 by driving a tracking actuator 12 by the speed error signal 29. Accordingly, the speed of the light spot 3 on a target track can be made constant by reducing the ripple component contained in the speed error signal 29 in a state that a speed of the light spot is low, and suppressing vibration of the light spot controlled by the speed error signal 29. In such a way, the light spot can be moved at high speed and stably.
JP18819087A 1987-07-27 1987-07-27 Light spot speed controller Pending JPS6432429A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP18819087A JPS6432429A (en) 1987-07-27 1987-07-27 Light spot speed controller

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP18819087A JPS6432429A (en) 1987-07-27 1987-07-27 Light spot speed controller

Publications (1)

Publication Number Publication Date
JPS6432429A true JPS6432429A (en) 1989-02-02

Family

ID=16219342

Family Applications (1)

Application Number Title Priority Date Filing Date
JP18819087A Pending JPS6432429A (en) 1987-07-27 1987-07-27 Light spot speed controller

Country Status (1)

Country Link
JP (1) JPS6432429A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH04139669A (en) * 1990-09-27 1992-05-13 Internatl Business Mach Corp <Ibm> Initialization of optical disc driver

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH04139669A (en) * 1990-09-27 1992-05-13 Internatl Business Mach Corp <Ibm> Initialization of optical disc driver

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