CN1048764A - 光扫描装置 - Google Patents

光扫描装置 Download PDF

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Publication number
CN1048764A
CN1048764A CN90104614A CN90104614A CN1048764A CN 1048764 A CN1048764 A CN 1048764A CN 90104614 A CN90104614 A CN 90104614A CN 90104614 A CN90104614 A CN 90104614A CN 1048764 A CN1048764 A CN 1048764A
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CN
China
Prior art keywords
data track
track
swing
scanning apparatus
rank
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
CN90104614A
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English (en)
Other versions
CN1019428B (zh
Inventor
默里莫托·亚苏阿基
楚克尔·弗里德海尔曼
比希尔·克里斯蒂安
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Deutsche Thomson Brandt GmbH
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Deutsche Thomson Brandt GmbH
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Filing date
Publication date
Application filed by Deutsche Thomson Brandt GmbH filed Critical Deutsche Thomson Brandt GmbH
Publication of CN1048764A publication Critical patent/CN1048764A/zh
Publication of CN1019428B publication Critical patent/CN1019428B/zh
Expired legal-status Critical Current

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    • 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
    • G11B7/08—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
    • 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
    • G11B7/0901—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 for track following only
    • G11B7/0904—Dithered tracking systems
    • 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
    • G11B7/24073—Tracks
    • G11B7/24082—Meandering

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  • Optical Recording Or Reproduction (AREA)
  • Optical Communication System (AREA)
  • Vehicle Body Suspensions (AREA)
  • Investigating Or Analysing Materials By Optical Means (AREA)
  • Moving Of The Head For Recording And Reproducing By Optical Means (AREA)
  • Holo Graphy (AREA)

Abstract

本发明为能进行三束处理的光扫描装置。已知 的光盘上的数据轨迹以一个中的频率摆动。由于数 据轨迹发生摆动，扫描光束的循迹引导就十分困难。 为了改善相对于数据循迹主束(L1)的数据轨迹有摆 动的光盘的循迹引导，光盘上的+1阶(L2)和-1阶 (L3)折射束之间的距离选为摆动轨迹的波长T的整 数倍。本发明可用于具有摆动的数据轨迹的光盘的 光重放装置。

Description

本发明涉及一种光扫描装置，该装置根据三束处理（the  three-beam-process）对一个信息介质进行扫描，该信息介质上的数据轨迹在径向上对中心位置而言是有摆动的。
EP-A-0  256  984是一个公知的唱片形状的信息介质，其数据轨迹以一个中频（middle  frequency）摆动，因此数据轨迹是正弦形状。这种特殊形状的数据轨迹的优点是它们能包含附加信息（如有关位置的信息），但其缺点是摆动的数据轨迹将使循迹引导变得困难，因而对循迹控制电路有很高的要求。
因此，本发明的目的是在光扫描装置中，使用一个简单的循迹控制电路即使在信息介质上的数据轨迹摆动时也实现精确的循迹引导。
本发明是这样实现上述目标的：使分别产生循迹误差信号的信息介质上的+1阶和-1阶折射束之间的距离达到与中频相关的波长的整数倍，这样，数据轨迹将相对于其中央位置摆动。
图1，是具有摆动的极根轨迹的介质盘。
图2，是光束在摆动的数据轨迹上的位置。
图2中示出了信息介质CD上的一条摆动的数据轨迹S。使用主光束L1扫描数据。+1阶和-1阶折射光束间的距离（它将产生循迹误差信号）等于n，T，其中，n为一个整数，T为与中频相关的波长。这二个折射波束被称为L2和L3。
由于这二个波束之间的距离为摆动轨迹的波长T的n整数倍，摆动的数据轨迹便不能对折射波束L2和L3产生的循迹误差信号加以调制。基于这个理由，由数据轨迹摆动而产生的干扰变量便不会出现在循迹控制电路中，这样，循迹控制电路便可以做得和轨迹不摆动的介质盘一样简单，不需要对循迹控制电路提出更高的要求。

Claims (1)

1、一种按照三束处理对一个信息介质(CD)进行扫描的光扫描装置，上述的信息介质上的数据轨迹在径向上相对于中心位置发生摆动，其特征在于：
产生循迹误差信号的信息介质上的+1和-1阶折射束(L2，L3)之间的距离为和中频有关的波长的整数倍，这样，数据轨迹(S)将以上述波长相对于其中心位置摆动。
CN90104614A 1989-07-14 1990-07-14 按照三束处理对信息介质扫描的光扫描方法 Expired CN1019428B (zh)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DEP3923330.8 1989-07-14
DE3923330A DE3923330A1 (de) 1989-07-14 1989-07-14 Optische abtastvorrichtung

Publications (2)

Publication Number Publication Date
CN1048764A true CN1048764A (zh) 1991-01-23
CN1019428B CN1019428B (zh) 1992-12-09

Family

ID=6385049

Family Applications (1)

Application Number Title Priority Date Filing Date
CN90104614A Expired CN1019428B (zh) 1989-07-14 1990-07-14 按照三束处理对信息介质扫描的光扫描方法

Country Status (14)

Country Link
US (1) US5247507A (zh)
EP (1) EP0485404B1 (zh)
JP (1) JP2877952B2 (zh)
KR (1) KR920704280A (zh)
CN (1) CN1019428B (zh)
AT (1) ATE111627T1 (zh)
AU (1) AU6040990A (zh)
DD (1) DD296773A5 (zh)
DE (2) DE3923330A1 (zh)
ES (1) ES2061051T3 (zh)
HK (1) HK68995A (zh)
HU (1) HUT60560A (zh)
MY (1) MY105973A (zh)
WO (1) WO1991001551A1 (zh)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR950010418B1 (ko) * 1991-08-28 1995-09-16 미쯔비시덴끼 가부시끼가이샤 광기록재생장치
US5659613A (en) * 1994-06-29 1997-08-19 Macrovision Corporation Method and apparatus for copy protection for various recording media using a video finger print
JPH08147699A (ja) * 1994-11-22 1996-06-07 Sony Corp 情報記録再生装置
US5835478A (en) * 1995-06-15 1998-11-10 Sony Corporation Optical disc having address information for recording and reproducing data at correct positions
KR970008064A (ko) * 1995-07-25 1997-02-24 김광호 컴팩트 디스크 플레이어의 흠집부분 재생방지방법
US6052358A (en) * 1996-10-04 2000-04-18 Sony Corporation Head feeding mechanism and optical pick-up feeding mechanism
US5757756A (en) * 1996-10-15 1998-05-26 Eastman Kodak Company Reducing mark length variations in recording data in wobbled groove storage media
JP3224513B2 (ja) * 1996-11-27 2001-10-29 シャープ株式会社 光ディスクの再生方法
US6355290B1 (en) * 1998-07-17 2002-03-12 Creative Edge Design Group, Ltd. Ice cream manufacturing and packaging process and a package for this process

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS583297B2 (ja) * 1978-06-09 1983-01-20 株式会社日立製作所 情報記録再生方法，その装置およびその記録媒体
NL8000121A (nl) * 1980-01-09 1981-08-03 Philips Nv Schijfvormige, optische uitleesbare registratiedrager als opslagmedium voor datainformatie, inrichting voor het vervaardigen van zo'n registratiedrager, inrichting voor het optekenen van datainformatie in zo'n registratiedrager en inrichting voor het uitlezen van zo'n registratiedrager.
JPS59177735A (ja) * 1983-03-25 1984-10-08 Canon Inc 光情報記録再生装置

Also Published As

Publication number Publication date
AU6040990A (en) 1991-02-22
DE59007160D1 (de) 1994-10-20
JP2877952B2 (ja) 1999-04-05
JPH04507029A (ja) 1992-12-03
KR920704280A (ko) 1992-12-19
MY105973A (en) 1995-02-28
HU9200019D0 (en) 1992-04-28
CN1019428B (zh) 1992-12-09
DE3923330A1 (de) 1991-01-24
ATE111627T1 (de) 1994-09-15
US5247507A (en) 1993-09-21
EP0485404B1 (de) 1994-09-14
WO1991001551A1 (de) 1991-02-07
HK68995A (en) 1995-05-12
EP0485404A1 (de) 1992-05-20
ES2061051T3 (es) 1994-12-01
HUT60560A (en) 1992-09-28
DD296773A5 (de) 1991-12-12

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GR02 Examined patent application
C14 Grant of patent or utility model
GR01 Patent grant
C15 Extension of patent right duration from 15 to 20 years for appl. with date before 31.12.1992 and still valid on 11.12.2001 (patent law change 1993)
OR01 Other related matters
C17 Cessation of patent right
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Granted publication date: 19930908