JP4720778B2 - 情報記録媒体の評価方法 - Google Patents

情報記録媒体の評価方法 Download PDF

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Publication number
JP4720778B2
JP4720778B2 JP2007115006A JP2007115006A JP4720778B2 JP 4720778 B2 JP4720778 B2 JP 4720778B2 JP 2007115006 A JP2007115006 A JP 2007115006A JP 2007115006 A JP2007115006 A JP 2007115006A JP 4720778 B2 JP4720778 B2 JP 4720778B2
Authority
JP
Japan
Prior art keywords
lsr
lnr
signal
lmin
medium
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 - Fee Related
Application number
JP2007115006A
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English (en)
Japanese (ja)
Other versions
JP2008269748A5 (enExample
JP2008269748A (ja
Inventor
宗一郎 江藤
俊通 新谷
浩行 峯邑
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.)
Hitachi Ltd
Original Assignee
Hitachi 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 Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP2007115006A priority Critical patent/JP4720778B2/ja
Priority to US12/108,809 priority patent/US7706244B2/en
Publication of JP2008269748A publication Critical patent/JP2008269748A/ja
Publication of JP2008269748A5 publication Critical patent/JP2008269748A5/ja
Application granted granted Critical
Publication of JP4720778B2 publication Critical patent/JP4720778B2/ja
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

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
    • G11B7/004—Recording, reproducing or erasing methods; Read, write or erase circuits therefor
    • G11B7/005—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
    • G11B7/12—Heads, e.g. forming of the optical beam spot or modulation of the optical beam
    • G11B7/125—Optical beam sources therefor, e.g. laser control circuitry specially adapted for optical storage devices; Modulators, e.g. means for controlling the size or intensity of optical spots or optical traces
    • G11B7/126—Circuits, methods or arrangements for laser control or stabilisation
    • G11B7/1267—Power calibration
    • 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

Landscapes

  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Optical Recording Or Reproduction (AREA)
  • Optical Record Carriers And Manufacture Thereof (AREA)
  • Signal Processing For Digital Recording And Reproducing (AREA)
  • Optical Head (AREA)
JP2007115006A 2007-04-25 2007-04-25 情報記録媒体の評価方法 Expired - Fee Related JP4720778B2 (ja)

Priority Applications (2)

Application Number Priority Date Filing Date Title
JP2007115006A JP4720778B2 (ja) 2007-04-25 2007-04-25 情報記録媒体の評価方法
US12/108,809 US7706244B2 (en) 2007-04-25 2008-04-24 Information recording media and playback power determining method for signal playback

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2007115006A JP4720778B2 (ja) 2007-04-25 2007-04-25 情報記録媒体の評価方法

Publications (3)

Publication Number Publication Date
JP2008269748A JP2008269748A (ja) 2008-11-06
JP2008269748A5 JP2008269748A5 (enExample) 2010-02-18
JP4720778B2 true JP4720778B2 (ja) 2011-07-13

Family

ID=39886829

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2007115006A Expired - Fee Related JP4720778B2 (ja) 2007-04-25 2007-04-25 情報記録媒体の評価方法

Country Status (2)

Country Link
US (1) US7706244B2 (enExample)
JP (1) JP4720778B2 (enExample)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2014119588A1 (ja) * 2013-02-04 2014-08-07 三菱電機株式会社 光情報記録媒体及び記録再生装置

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4287580B2 (ja) * 1999-11-30 2009-07-01 Ｔｄｋ株式会社 光情報媒体の再生方法
JP3835401B2 (ja) * 2002-11-18 2006-10-18 ソニー株式会社 光ディスク再生方法及び光ディスク
KR20050081260A (ko) * 2004-02-11 2005-08-19 삼성전자주식회사 초해상 정보저장매체에 기록된 정보 재생방법 및 장치
US7710850B2 (en) * 2004-06-30 2010-05-04 Samsung Electronics Co., Ltd. Method and apparatus for reproducing data of super resolution information storage medium
JP4349248B2 (ja) * 2004-10-04 2009-10-21 株式会社日立製作所 光情報記録媒体、その再生方法及びその製造方法
JP2006313635A (ja) * 2006-07-20 2006-11-16 Toshiba Corp 再生信号評価方法、情報記録媒体、及び情報再生装置
JP4778940B2 (ja) * 2007-09-20 2011-09-21 株式会社日立製作所 光情報再生方法及び光情報再生装置

Also Published As

Publication number Publication date
US7706244B2 (en) 2010-04-27
US20080267050A1 (en) 2008-10-30
JP2008269748A (ja) 2008-11-06

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