JPS57103138A - Inspecting method for recording medium - Google Patents

Inspecting method for recording medium

Info

Publication number
JPS57103138A
JPS57103138A JP17997380A JP17997380A JPS57103138A JP S57103138 A JPS57103138 A JP S57103138A JP 17997380 A JP17997380 A JP 17997380A JP 17997380 A JP17997380 A JP 17997380A JP S57103138 A JPS57103138 A JP S57103138A
Authority
JP
Japan
Prior art keywords
tracks
command signal
jump
jumping
recording
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
JP17997380A
Other languages
Japanese (ja)
Inventor
Tomiji Tsuchiya
Kenzo Fujie
Hitoshi Hoshi
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.)
Pioneer Video Corp
Pioneer Corp
Universal Pioneer Corp
Original Assignee
Pioneer Video Corp
Pioneer Corp
Pioneer Electronic Corp
Universal Pioneer 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 Pioneer Video Corp, Pioneer Corp, Pioneer Electronic Corp, Universal Pioneer Corp filed Critical Pioneer Video Corp
Priority to JP17997380A priority Critical patent/JPS57103138A/en
Publication of JPS57103138A publication Critical patent/JPS57103138A/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
    • G11B19/00—Driving, starting, stopping record carriers not specifically of filamentary or web form, or of supports therefor; Control thereof; Control of operating function ; Driving both disc and head
    • G11B19/02—Control of operating function, e.g. switching from recording to reproducing
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B27/00—Editing; Indexing; Addressing; Timing or synchronising; Monitoring; Measuring tape travel
    • G11B27/36—Monitoring, i.e. supervising the progress of recording or reproducing
    • 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

Landscapes

  • Manufacturing Optical Record Carriers (AREA)

Abstract

PURPOSE:To complete inspection in a short time by jumping a head over a prescribed number of recording tracks, and by inspecting a recording state while performing real-time reproduction by the prescribed number of tracks following the jumped recording tracks. CONSTITUTION:A jump command signal from a jump command signal generating circuit 15 turns on and off a servo loop switch 5 and in response to the command signal, a tracking mirror 8 is driven by a driving circuit 6 to move a pickup spot S2 by a track pitch in the radius direction of a disk, thus jumping tracks. Once the generation of jump pulses ends, real-time reproduction from two following tracks is performed. Simultaneously, a focus error signal, a dropout detection signal and a tracking error signal are inspected.
JP17997380A 1980-12-19 1980-12-19 Inspecting method for recording medium Pending JPS57103138A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP17997380A JPS57103138A (en) 1980-12-19 1980-12-19 Inspecting method for recording medium

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP17997380A JPS57103138A (en) 1980-12-19 1980-12-19 Inspecting method for recording medium

Publications (1)

Publication Number Publication Date
JPS57103138A true JPS57103138A (en) 1982-06-26

Family

ID=16075212

Family Applications (1)

Application Number Title Priority Date Filing Date
JP17997380A Pending JPS57103138A (en) 1980-12-19 1980-12-19 Inspecting method for recording medium

Country Status (1)

Country Link
JP (1) JPS57103138A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61104439A (en) * 1984-10-26 1986-05-22 Toshiba Ii M I Kk Method and device for detecting defect of recording medium with no contact
JPS61104440A (en) * 1984-10-26 1986-05-22 Toshiba Ii M I Kk Method and device for detecting deffect of recording medium with no contact

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61104439A (en) * 1984-10-26 1986-05-22 Toshiba Ii M I Kk Method and device for detecting defect of recording medium with no contact
JPS61104440A (en) * 1984-10-26 1986-05-22 Toshiba Ii M I Kk Method and device for detecting deffect of recording medium with no contact

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