CN1461402A - 局部轨迹间距的测量装置和方法 - Google Patents

局部轨迹间距的测量装置和方法 Download PDF

Info

Publication number
CN1461402A
CN1461402A CN02801217A CN02801217A CN1461402A CN 1461402 A CN1461402 A CN 1461402A CN 02801217 A CN02801217 A CN 02801217A CN 02801217 A CN02801217 A CN 02801217A CN 1461402 A CN1461402 A CN 1461402A
Authority
CN
China
Prior art keywords
trp
signal
local path
laser beam
beam spot
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
CN02801217A
Other languages
English (en)
Chinese (zh)
Inventor
U·威廉松
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.)
AudioDev AB
Original Assignee
AudioDev AB
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 AudioDev AB filed Critical AudioDev AB
Publication of CN1461402A publication Critical patent/CN1461402A/zh
Pending legal-status Critical Current

Links

Images

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
    • 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
    • G11B7/26—Apparatus or processes specially adapted for the manufacture of record carriers
    • 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
    • G11B7/002—Recording, reproducing or erasing systems characterised by the shape or form of the carrier
    • G11B7/0037—Recording, reproducing or erasing systems characterised by the shape or form of the carrier with discs
    • G11B7/00375—Recording, reproducing or erasing systems characterised by the shape or form of the carrier with discs arrangements for detection of physical defects, e.g. of recording layer

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Optical Recording Or Reproduction (AREA)
  • Length Measuring Devices By Optical Means (AREA)
  • Moving Of The Head For Recording And Reproducing By Optical Means (AREA)
  • Manufacturing Optical Record Carriers (AREA)
CN02801217A 2001-02-23 2002-02-22 局部轨迹间距的测量装置和方法 Pending CN1461402A (zh)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE01006212 2001-02-23
SE0100621A SE525754C2 (sv) 2001-02-23 2001-02-23 Apparat och metod för mätning av lokalt spåravstånd

Publications (1)

Publication Number Publication Date
CN1461402A true CN1461402A (zh) 2003-12-10

Family

ID=20283109

Family Applications (1)

Application Number Title Priority Date Filing Date
CN02801217A Pending CN1461402A (zh) 2001-02-23 2002-02-22 局部轨迹间距的测量装置和方法

Country Status (6)

Country Link
EP (1) EP1362217A1 (sv)
JP (1) JP2005518617A (sv)
KR (1) KR20030013389A (sv)
CN (1) CN1461402A (sv)
SE (1) SE525754C2 (sv)
WO (1) WO2002070986A1 (sv)

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4504939A (en) * 1981-12-10 1985-03-12 Discovision Associates Storage medium track pitch detector
JP2635608B2 (ja) * 1987-08-29 1997-07-30 株式会社東芝 光学的情報記憶媒体検査装置
JPH02220237A (ja) * 1989-02-21 1990-09-03 Pioneer Electron Corp トラッキングサーボ装置におけるエラー信号増幅器のゲイン制御方式
JPH09330554A (ja) * 1996-05-28 1997-12-22 Pioneer Electron Corp 光ディスク再生装置

Also Published As

Publication number Publication date
JP2005518617A (ja) 2005-06-23
KR20030013389A (ko) 2003-02-14
SE525754C2 (sv) 2005-04-19
WO2002070986A1 (en) 2002-09-12
SE0100621D0 (sv) 2001-02-23
SE0100621L (sv) 2002-08-24
EP1362217A1 (en) 2003-11-19

Similar Documents

Publication Publication Date Title
CN100437764C (zh) 光学数据载体的质量测试方法
EP1231601B1 (en) Information recording apparatus
CN1805035A (zh) 识别盘类型的方法和装置
KR20010102109A (ko) 광디스크 구동장치
CN1279516C (zh) 质量测试设备和方法
JP4565353B2 (ja) 光ディスク装置及び位置制御方法並びに光ピックアップ
KR101143795B1 (ko) 광디스크 제조용 원반의 제작 방법 및 광디스크의 제조 방법
CN1461402A (zh) 局部轨迹间距的测量装置和方法
CN1286100C (zh) 光头、ld模组、光学记录和再现设备以及该光学记录和再现设备中使用的衍射元件
US20040081048A1 (en) Local track pitch measuring apparatus and method
CN100403422C (zh) 光盘设备
CN1950894A (zh) 电动机传送速率校准跳跃
JP3969914B2 (ja) 光ピックアップ装置及びそれを用いた光学記録媒体駆動装置
JP2003021542A (ja) 変位量を検出する装置及び方法
JP2001208517A (ja) 光ディスク検査装置
CN1875407A (zh) 用于从光盘读取信息的方法和装置
JPH09145326A (ja) 光ディスク原盤の溝パラメータ測定方法・測定装置、製造方法、及び、現像方法・現像装置
JP2003346384A (ja) 光学記録再生媒体、光学記録再生媒体製造用原盤、光学記録再生媒体の製造方法及び光学記録再生装置
JPH10320821A (ja) 光ピックアップ装置およびそれを用いた光学記録媒体駆動装置
CN1819040A (zh) 光盘读写设备及其方法
CN1608287A (zh) 在光学数据载体盘上保存附加数据
JPH09231620A (ja) 光学式ディスクのトラックピッチ検査方法及びその装置
CN1592931A (zh) 光读取单元、信息处理设备及信息再现方法
JP2002197677A (ja) 不正複写防止機能付き光ディスクおよび光ディスク装置
JP2000132834A (ja) 記録媒体の測定装置

Legal Events

Date Code Title Description
C06 Publication
PB01 Publication
C10 Entry into substantive examination
SE01 Entry into force of request for substantive examination
REG Reference to a national code

Ref country code: HK

Ref legal event code: DE

Ref document number: 1058963

Country of ref document: HK

C02 Deemed withdrawal of patent application after publication (patent law 2001)
WD01 Invention patent application deemed withdrawn after publication
REG Reference to a national code

Ref country code: HK

Ref legal event code: WD

Ref document number: 1058963

Country of ref document: HK