JPS5622230A - Optical disk - Google Patents

Optical disk

Info

Publication number
JPS5622230A
JPS5622230A JP9771379A JP9771379A JPS5622230A JP S5622230 A JPS5622230 A JP S5622230A JP 9771379 A JP9771379 A JP 9771379A JP 9771379 A JP9771379 A JP 9771379A JP S5622230 A JPS5622230 A JP S5622230A
Authority
JP
Japan
Prior art keywords
recording
track
beam light
start point
information
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
JP9771379A
Other languages
Japanese (ja)
Inventor
Yoshiaki Tago
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.)
Toshiba Corp
Original Assignee
Toshiba Corp
Tokyo Shibaura Electric 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 Toshiba Corp, Tokyo Shibaura Electric Co Ltd filed Critical Toshiba Corp
Priority to JP9771379A priority Critical patent/JPS5622230A/en
Publication of JPS5622230A publication Critical patent/JPS5622230A/en
Pending legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
    • G11B7/08—Disposition or mounting of heads or light sources relatively to record carriers
    • G11B7/09—Disposition or mounting of heads or light sources relatively to record carriers with provision for moving the light beam or focus plane for the purpose of maintaining alignment of the light beam relative to the record carrier during transducing operation, e.g. to compensate for surface irregularities of the latter or for track following
    • G11B7/0901—Disposition or mounting of heads or light sources relatively to record carriers with provision for moving the light beam or focus plane for the purpose of maintaining alignment of the light beam relative to the record carrier during transducing operation, e.g. to compensate for surface irregularities of the latter or for track following for track following only

Abstract

PURPOSE:To attain accurate recording with a simple constitution by making the tracing of tracking beam light possible from the beginning, by previously recording a spiral track of at least not less than a single rotation at the start point at an information recording side. CONSTITUTION:The substrate of optical disk 13 is formed of circular glass, for example, and on its surface, recording area 15 is provided. The recording area 15 is obtained by vapor-depositing a metal coating layer of bismuth, for example, on the substrate and from the start point of its information recording, spiral track T' rotating once is recorded. Namely, to record information initially from the start point, a new track is irradiated with recording beam light while said track T1' is traced with tracking beam light, thereby recording the information. Therefore, the recording can be carried out from the beginning by irradiating the track with the recording beam lighr over tracing by tracking beam light.
JP9771379A 1979-07-31 1979-07-31 Optical disk Pending JPS5622230A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP9771379A JPS5622230A (en) 1979-07-31 1979-07-31 Optical disk

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP9771379A JPS5622230A (en) 1979-07-31 1979-07-31 Optical disk

Publications (1)

Publication Number Publication Date
JPS5622230A true JPS5622230A (en) 1981-03-02

Family

ID=14199525

Family Applications (1)

Application Number Title Priority Date Filing Date
JP9771379A Pending JPS5622230A (en) 1979-07-31 1979-07-31 Optical disk

Country Status (1)

Country Link
JP (1) JPS5622230A (en)

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