JPS57143743A - Disk-like information recording medium and its reproducing system - Google Patents

Disk-like information recording medium and its reproducing system

Info

Publication number
JPS57143743A
JPS57143743A JP56029706A JP2970681A JPS57143743A JP S57143743 A JPS57143743 A JP S57143743A JP 56029706 A JP56029706 A JP 56029706A JP 2970681 A JP2970681 A JP 2970681A JP S57143743 A JPS57143743 A JP S57143743A
Authority
JP
Japan
Prior art keywords
reproducing
main information
information signal
pit
signal
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
JP56029706A
Other languages
Japanese (ja)
Other versions
JPS6338774B2 (en
Inventor
Susumu Sakakibara
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.)
Victor Company of Japan Ltd
Nippon Victor KK
Original Assignee
Victor Company of Japan Ltd
Nippon Victor KK
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 Victor Company of Japan Ltd, Nippon Victor KK filed Critical Victor Company of Japan Ltd
Priority to JP56029706A priority Critical patent/JPS57143743A/en
Publication of JPS57143743A publication Critical patent/JPS57143743A/en
Publication of JPS6338774B2 publication Critical patent/JPS6338774B2/ja
Granted legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B9/00—Recording or reproducing using a method not covered by one of the main groups G11B3/00 - G11B7/00; Record carriers therefor
    • G11B9/06—Recording or reproducing using a method not covered by one of the main groups G11B3/00 - G11B7/00; Record carriers therefor using record carriers having variable electrical capacitance; Record carriers therefor

Landscapes

  • Optical Record Carriers And Manufacture Thereof (AREA)
  • Optical Recording Or Reproduction (AREA)

Abstract

PURPOSE:To simplify a circuit comparing with a conventional reproducing device and constituted at a low cost, by forming a shape of a pit of a main information signal so that it is made different in its radial direction. CONSTITUTION:On the surface of a disk 22, a main information signal recording main track 25 constituted by repeating a flat surface 23 and a pit 24 is spirally formed without providing a tracking signal sub-track. When reproducing, if a reproducing element is shifted from the center of a main information signal pit and is traced, a reproducing main information signal of a level being different from that of the reproducing main information signal in case when the reproducing element has traced the center of the pits 24, 31 is fetched, and it is made a tracking error signal. In this way, comparing with a conventional reproducing device, it is unnecessary to provide a filter, a recording medium changeover switch, an error amplifier for obtaining a tracking error signal, etc., therefore, the circuit is contituted easily and at a low cost.
JP56029706A 1981-03-02 1981-03-02 Disk-like information recording medium and its reproducing system Granted JPS57143743A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP56029706A JPS57143743A (en) 1981-03-02 1981-03-02 Disk-like information recording medium and its reproducing system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP56029706A JPS57143743A (en) 1981-03-02 1981-03-02 Disk-like information recording medium and its reproducing system

Publications (2)

Publication Number Publication Date
JPS57143743A true JPS57143743A (en) 1982-09-06
JPS6338774B2 JPS6338774B2 (en) 1988-08-02

Family

ID=12283546

Family Applications (1)

Application Number Title Priority Date Filing Date
JP56029706A Granted JPS57143743A (en) 1981-03-02 1981-03-02 Disk-like information recording medium and its reproducing system

Country Status (1)

Country Link
JP (1) JPS57143743A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0441399A2 (en) * 1990-02-09 1991-08-14 Canon Kabushiki Kaisha Position displacement detecting apparatus
EP0475365A2 (en) * 1990-09-14 1992-03-18 Canon Kabushiki Kaisha Tracking method for memory apparatus
US5404349A (en) * 1990-02-09 1995-04-04 Canon Kabushiki Kaisha Position displacement detecting apparatus

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0441399A2 (en) * 1990-02-09 1991-08-14 Canon Kabushiki Kaisha Position displacement detecting apparatus
US5404349A (en) * 1990-02-09 1995-04-04 Canon Kabushiki Kaisha Position displacement detecting apparatus
EP0475365A2 (en) * 1990-09-14 1992-03-18 Canon Kabushiki Kaisha Tracking method for memory apparatus
US5251200A (en) * 1990-09-14 1993-10-05 Canon Kabushiki Kaisha Tracking method for memory apparatus

Also Published As

Publication number Publication date
JPS6338774B2 (en) 1988-08-02

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