SG43257A1 - Improved optical disc tracking control - Google Patents

Improved optical disc tracking control

Info

Publication number
SG43257A1
SG43257A1 SG1996006592A SG1996006592A SG43257A1 SG 43257 A1 SG43257 A1 SG 43257A1 SG 1996006592 A SG1996006592 A SG 1996006592A SG 1996006592 A SG1996006592 A SG 1996006592A SG 43257 A1 SG43257 A1 SG 43257A1
Authority
SG
Singapore
Prior art keywords
tracking servo
light beam
optical disc
closed loop
loop mode
Prior art date
Application number
SG1996006592A
Other languages
English (en)
Inventor
Ludwig Ceshkovsky
Original Assignee
Discovision Ass
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 Discovision Ass filed Critical Discovision Ass
Publication of SG43257A1 publication Critical patent/SG43257A1/en

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
    • 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
    • G11B7/08505—Methods for track change, selection or preliminary positioning by moving the head
    • 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
    • G11B7/08505—Methods for track change, selection or preliminary positioning by moving the head
    • G11B7/08517—Methods for track change, selection or preliminary positioning by moving the head with tracking pull-in only
    • 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
    • G11B7/0943—Methods and circuits for performing mathematical operations on individual detector segment outputs

Landscapes

  • Optical Recording Or Reproduction (AREA)
  • Moving Of The Head For Recording And Reproducing By Optical Means (AREA)
  • Supporting Of Heads In Record-Carrier Devices (AREA)
  • Holo Graphy (AREA)
  • Electrochromic Elements, Electrophoresis, Or Variable Reflection Or Absorption Elements (AREA)
  • Moving Of Head For Track Selection And Changing (AREA)
  • Optical Head (AREA)
  • Moving Of The Head To Find And Align With The Track (AREA)
SG1996006592A 1995-06-07 1996-03-12 Improved optical disc tracking control SG43257A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US08/474,424 US5978329A (en) 1995-06-07 1995-06-07 Technique for closed loop servo operation in optical disc tracking control

Publications (1)

Publication Number Publication Date
SG43257A1 true SG43257A1 (en) 1997-10-17

Family

ID=23883475

Family Applications (1)

Application Number Title Priority Date Filing Date
SG1996006592A SG43257A1 (en) 1995-06-07 1996-03-12 Improved optical disc tracking control

Country Status (15)

Country Link
US (2) US5978329A (ko)
EP (1) EP0747892B1 (ko)
JP (1) JP3978246B2 (ko)
KR (1) KR100377699B1 (ko)
CN (1) CN1122270C (ko)
AT (1) ATE242531T1 (ko)
AU (1) AU718122B2 (ko)
BR (1) BR9600954A (ko)
CA (1) CA2170336C (ko)
DE (1) DE69628502T2 (ko)
ES (1) ES2112223T1 (ko)
HK (1) HK1009616A1 (ko)
MY (1) MY116645A (ko)
NO (1) NO318976B1 (ko)
SG (1) SG43257A1 (ko)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
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US5689485A (en) 1996-04-01 1997-11-18 Discovision Associates Tracking control apparatus and method
US6744711B1 (en) 2000-06-20 2004-06-01 Discovision Associates Method and apparatus for a high-speed search of an optical medium
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US6982935B2 (en) * 2002-02-01 2006-01-03 Discovision Associates Pause control for a media player with a movable pickup
JP2008529200A (ja) 2005-02-04 2008-07-31 コーニンクレッカ フィリップス エレクトロニクス エヌ ヴィ 光ドライブ内における焦点捕捉方法

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Also Published As

Publication number Publication date
JP3978246B2 (ja) 2007-09-19
KR100377699B1 (ko) 2003-11-01
DE69628502D1 (de) 2003-07-10
BR9600954A (pt) 1997-12-30
CN1138196A (zh) 1996-12-18
US5978329A (en) 1999-11-02
ES2112223T1 (es) 1998-04-01
ATE242531T1 (de) 2003-06-15
NO960995D0 (no) 1996-03-11
CA2170336A1 (en) 1996-12-08
CA2170336C (en) 2002-12-10
NO960995L (no) 1996-12-09
US5881036A (en) 1999-03-09
CN1122270C (zh) 2003-09-24
EP0747892B1 (en) 2003-06-04
AU718122B2 (en) 2000-04-06
MY116645A (en) 2004-03-31
EP0747892A3 (en) 1998-05-20
HK1009616A1 (en) 1999-06-04
DE69628502T2 (de) 2004-04-29
AU4821296A (en) 1996-12-19
NO318976B1 (no) 2005-05-30
JPH08335320A (ja) 1996-12-17
KR970002919A (ko) 1997-01-28
EP0747892A2 (en) 1996-12-11

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