JPS6446233A - Recording and reproducing device for optical information - Google Patents

Recording and reproducing device for optical information

Info

Publication number
JPS6446233A
JPS6446233A JP20183687A JP20183687A JPS6446233A JP S6446233 A JPS6446233 A JP S6446233A JP 20183687 A JP20183687 A JP 20183687A JP 20183687 A JP20183687 A JP 20183687A JP S6446233 A JPS6446233 A JP S6446233A
Authority
JP
Japan
Prior art keywords
servo
focusing
tracking
loop
lead
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.)
Granted
Application number
JP20183687A
Other languages
Japanese (ja)
Other versions
JPH069085B2 (en
Inventor
Satoshi Shikichi
Shigeto Kanda
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 JP62201836A priority Critical patent/JPH069085B2/en
Publication of JPS6446233A publication Critical patent/JPS6446233A/en
Publication of JPH069085B2 publication Critical patent/JPH069085B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Landscapes

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

Abstract

PURPOSE:To stably lead in a focusing and/or a tracking servo by changing the aimed value of a second servo loop and detecting the lead-in position of a first servo loop. CONSTITUTION:The tracking servo or the focusing servo is obtained as the first servo loop. When the focusing servo or the tracking servo is led in, the second servo loop to obtain a focusing signal or a tracking signal, whose system is different from that of the signal of the focusing servo or the tracking servo usually executed, is possessed. A position detecting part 301 of the objective lens and light sources 304, 305, etc., of a LED, etc., are provided. When an oscillation is applied from the outside, the oscillation of an objective lens 110 can be minimized by the second servo loop including a position detecting part 301. Thus, the stable servo lead-in can be executed.
JP62201836A 1987-08-14 1987-08-14 Optical information recording / reproducing device Expired - Fee Related JPH069085B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP62201836A JPH069085B2 (en) 1987-08-14 1987-08-14 Optical information recording / reproducing device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP62201836A JPH069085B2 (en) 1987-08-14 1987-08-14 Optical information recording / reproducing device

Publications (2)

Publication Number Publication Date
JPS6446233A true JPS6446233A (en) 1989-02-20
JPH069085B2 JPH069085B2 (en) 1994-02-02

Family

ID=16447700

Family Applications (1)

Application Number Title Priority Date Filing Date
JP62201836A Expired - Fee Related JPH069085B2 (en) 1987-08-14 1987-08-14 Optical information recording / reproducing device

Country Status (1)

Country Link
JP (1) JPH069085B2 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH01227229A (en) * 1988-03-07 1989-09-11 Matsushita Electric Ind Co Ltd Information recording and reproducing device

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60186515U (en) * 1984-05-23 1985-12-10 アイワ株式会社 optical pickup device
JPS6134734A (en) * 1984-07-25 1986-02-19 Sony Corp Optical disc player

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60186515U (en) * 1984-05-23 1985-12-10 アイワ株式会社 optical pickup device
JPS6134734A (en) * 1984-07-25 1986-02-19 Sony Corp Optical disc player

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH01227229A (en) * 1988-03-07 1989-09-11 Matsushita Electric Ind Co Ltd Information recording and reproducing device

Also Published As

Publication number Publication date
JPH069085B2 (en) 1994-02-02

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Legal Events

Date Code Title Description
LAPS Cancellation because of no payment of annual fees