JPH0480455B2 - - Google Patents

Info

Publication number
JPH0480455B2
JPH0480455B2 JP59057862A JP5786284A JPH0480455B2 JP H0480455 B2 JPH0480455 B2 JP H0480455B2 JP 59057862 A JP59057862 A JP 59057862A JP 5786284 A JP5786284 A JP 5786284A JP H0480455 B2 JPH0480455 B2 JP H0480455B2
Authority
JP
Japan
Prior art keywords
recording medium
light beam
recording
focus control
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.)
Expired - Lifetime
Application number
JP59057862A
Other languages
English (en)
Japanese (ja)
Other versions
JPS59223960A (ja
Inventor
Mitsuro Morya
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.)
Panasonic Holdings Corp
Original Assignee
Matsushita Electric Industrial 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 Matsushita Electric Industrial Co Ltd filed Critical Matsushita Electric Industrial Co Ltd
Priority to JP59057862A priority Critical patent/JPS59223960A/ja
Publication of JPS59223960A publication Critical patent/JPS59223960A/ja
Publication of JPH0480455B2 publication Critical patent/JPH0480455B2/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
    • 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
    • G11B7/095—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 specially adapted for discs, e.g. for compensation of eccentricity or wobble
    • G11B7/0953—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 specially adapted for discs, e.g. for compensation of eccentricity or wobble to compensate for eccentricity of the disc or disc tracks
    • 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
    • G11B7/085—Disposition or mounting of heads or light sources relatively to record carriers with provision for moving the light beam into, or out of, its operative position or across tracks, otherwise than during the transducing operation, e.g. for adjustment or preliminary positioning or track change or selection

Landscapes

  • Optical Record Carriers And Manufacture Thereof (AREA)
  • Optical Recording Or Reproduction (AREA)
JP59057862A 1984-03-26 1984-03-26 光学式記録媒体 Granted JPS59223960A (ja)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP59057862A JPS59223960A (ja) 1984-03-26 1984-03-26 光学式記録媒体

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP59057862A JPS59223960A (ja) 1984-03-26 1984-03-26 光学式記録媒体

Related Parent Applications (1)

Application Number Title Priority Date Filing Date
JP4487677A Division JPS53129604A (en) 1977-04-18 1977-04-18 Optical recorder-reproducer

Related Child Applications (1)

Application Number Title Priority Date Filing Date
JP23605891A Division JPH0719379B2 (ja) 1991-09-17 1991-09-17 焦点制御の制御位置調整方法

Publications (2)

Publication Number Publication Date
JPS59223960A JPS59223960A (ja) 1984-12-15
JPH0480455B2 true JPH0480455B2 (en, 2012) 1992-12-18

Family

ID=13067802

Family Applications (1)

Application Number Title Priority Date Filing Date
JP59057862A Granted JPS59223960A (ja) 1984-03-26 1984-03-26 光学式記録媒体

Country Status (1)

Country Link
JP (1) JPS59223960A (en, 2012)

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5935092B2 (ja) * 1975-08-15 1984-08-27 ソニー株式会社 情報記録媒体の製造装置
JPS6030014B2 (ja) * 1975-09-25 1985-07-13 松下電器産業株式会社 光学的記録再生装置における記録板設定位置検出方法並びにそれに使用する記録板
JPS5369005A (en) * 1976-12-01 1978-06-20 Teac Co Automatic focus controller
JPS53129604A (en) * 1977-04-18 1978-11-11 Matsushita Electric Ind Co Ltd Optical recorder-reproducer
JPS5630612A (en) * 1979-08-21 1981-03-27 Toshiba Corp Pressure transducer
EP0165331B1 (en) * 1984-06-22 1988-08-24 Ibm Deutschland Gmbh Buckling beam test probe assembly

Also Published As

Publication number Publication date
JPS59223960A (ja) 1984-12-15

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