JPS6470974A - Tracking servo device - Google Patents

Tracking servo device

Info

Publication number
JPS6470974A
JPS6470974A JP22769287A JP22769287A JPS6470974A JP S6470974 A JPS6470974 A JP S6470974A JP 22769287 A JP22769287 A JP 22769287A JP 22769287 A JP22769287 A JP 22769287A JP S6470974 A JPS6470974 A JP S6470974A
Authority
JP
Japan
Prior art keywords
phase difference
represented
tracking error
information
relative phase
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
JP22769287A
Other languages
Japanese (ja)
Other versions
JPH0770071B2 (en
Inventor
Tetsuya Sato
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.)
Denso Ten Ltd
Original Assignee
Denso Ten 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 Denso Ten Ltd filed Critical Denso Ten Ltd
Priority to JP62227692A priority Critical patent/JPH0770071B2/en
Publication of JPS6470974A publication Critical patent/JPS6470974A/en
Publication of JPH0770071B2 publication Critical patent/JPH0770071B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Landscapes

  • Optical Recording Or Reproduction (AREA)
  • Moving Of The Head To Find And Align With The Track (AREA)

Abstract

PURPOSE:To improve the traceability of a track by controlling the relative phase difference of the respective reading outputs of the information of a medium. CONSTITUTION:The recording information of the medium (compact disk) 1 is read in the areas A-D of a light receiving element 3 of an optical pickup 2, the respective reading outputs are added 10, and reproduced 12 as information such as an acoustic signal. The respective reading outputs are mutually compared 8, 9, the misregistration in the respective readings to the direction of the track 70 is represented as a constant phase difference in an output waveform, an unevenness in the characteristic of the respective areas of the element 3 is represented as the relative phase difference and a tracking error is represented as the phase difference corresponding to the quantity of the misregistration. Accordingly, the relative phase difference corresponding to a reading output is controlled to detect (tracking error detection circuit) 30 the phase difference only corresponding to the tracking error and execute a correct tracking servo.
JP62227692A 1987-09-10 1987-09-10 Tracking servo system Expired - Fee Related JPH0770071B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP62227692A JPH0770071B2 (en) 1987-09-10 1987-09-10 Tracking servo system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP62227692A JPH0770071B2 (en) 1987-09-10 1987-09-10 Tracking servo system

Publications (2)

Publication Number Publication Date
JPS6470974A true JPS6470974A (en) 1989-03-16
JPH0770071B2 JPH0770071B2 (en) 1995-07-31

Family

ID=16864850

Family Applications (1)

Application Number Title Priority Date Filing Date
JP62227692A Expired - Fee Related JPH0770071B2 (en) 1987-09-10 1987-09-10 Tracking servo system

Country Status (1)

Country Link
JP (1) JPH0770071B2 (en)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6164622U (en) * 1984-10-02 1986-05-02
JPS61104336A (en) * 1984-10-23 1986-05-22 Seiko Epson Corp optical recording device
JPS63152029A (en) * 1986-12-15 1988-06-24 Pioneer Electronic Corp Generation device for tracking error signal

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6164622U (en) * 1984-10-02 1986-05-02
JPS61104336A (en) * 1984-10-23 1986-05-22 Seiko Epson Corp optical recording device
JPS63152029A (en) * 1986-12-15 1988-06-24 Pioneer Electronic Corp Generation device for tracking error signal

Also Published As

Publication number Publication date
JPH0770071B2 (en) 1995-07-31

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Legal Events

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