JPS60121550A - 光学式情報記録担体 - Google Patents

光学式情報記録担体

Info

Publication number
JPS60121550A
JPS60121550A JP58228731A JP22873183A JPS60121550A JP S60121550 A JPS60121550 A JP S60121550A JP 58228731 A JP58228731 A JP 58228731A JP 22873183 A JP22873183 A JP 22873183A JP S60121550 A JPS60121550 A JP S60121550A
Authority
JP
Japan
Prior art keywords
track
signal
width
tracking
uneven
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
JP58228731A
Other languages
English (en)
Japanese (ja)
Other versions
JPH0452536B2 (en:Method
Inventor
Mitsuro Moriya
充郎 守屋
Kazuharu Shiragami
白神　和治
Hiroyuki Yamaguchi
博之 山口
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 JP58228731A priority Critical patent/JPS60121550A/ja
Publication of JPS60121550A publication Critical patent/JPS60121550A/ja
Publication of JPH0452536B2 publication Critical patent/JPH0452536B2/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
    • G11B7/24—Record carriers characterised by shape, structure or physical properties, or by the selection of the material
    • G11B7/2407—Tracks or pits; Shape, structure or physical properties thereof
    • G11B7/24085—Pits
    • 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
    • G11B7/0938—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 servo format, e.g. guide tracks, pilot signals

Landscapes

  • Optical Record Carriers And Manufacture Thereof (AREA)
JP58228731A 1983-12-02 1983-12-02 光学式情報記録担体 Granted JPS60121550A (ja)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP58228731A JPS60121550A (ja) 1983-12-02 1983-12-02 光学式情報記録担体

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP58228731A JPS60121550A (ja) 1983-12-02 1983-12-02 光学式情報記録担体

Publications (2)

Publication Number Publication Date
JPS60121550A true JPS60121550A (ja) 1985-06-29
JPH0452536B2 JPH0452536B2 (en:Method) 1992-08-24

Family

ID=16880925

Family Applications (1)

Application Number Title Priority Date Filing Date
JP58228731A Granted JPS60121550A (ja) 1983-12-02 1983-12-02 光学式情報記録担体

Country Status (1)

Country Link
JP (1) JPS60121550A (en:Method)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH06282890A (ja) * 1994-01-31 1994-10-07 Sharp Corp 光磁気メモリ素子
JPH06282889A (ja) * 1994-01-31 1994-10-07 Sharp Corp 光磁気メモリ素子
US5508995A (en) * 1993-07-15 1996-04-16 Matsushita Electric Industrial Co., Ltd. Optical disk capable of recording information on both groove and land tracks
US5577016A (en) * 1992-10-23 1996-11-19 Matsushita Electric Industrial Co., Ltd. Recording medium having concavo-convex pits with a maximum and a minimum pit depth depending on the wavelength of a laser light

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5930251A (ja) * 1982-08-10 1984-02-17 Toshiba Corp 光学式情報記憶媒体

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5930251A (ja) * 1982-08-10 1984-02-17 Toshiba Corp 光学式情報記憶媒体

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5577016A (en) * 1992-10-23 1996-11-19 Matsushita Electric Industrial Co., Ltd. Recording medium having concavo-convex pits with a maximum and a minimum pit depth depending on the wavelength of a laser light
US5508995A (en) * 1993-07-15 1996-04-16 Matsushita Electric Industrial Co., Ltd. Optical disk capable of recording information on both groove and land tracks
JPH06282890A (ja) * 1994-01-31 1994-10-07 Sharp Corp 光磁気メモリ素子
JPH06282889A (ja) * 1994-01-31 1994-10-07 Sharp Corp 光磁気メモリ素子

Also Published As

Publication number Publication date
JPH0452536B2 (en:Method) 1992-08-24

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