GB8408613D0 - Following recorded tracks on optical discs - Google Patents

Following recorded tracks on optical discs

Info

Publication number
GB8408613D0
GB8408613D0 GB848408613A GB8408613A GB8408613D0 GB 8408613 D0 GB8408613 D0 GB 8408613D0 GB 848408613 A GB848408613 A GB 848408613A GB 8408613 A GB8408613 A GB 8408613A GB 8408613 D0 GB8408613 D0 GB 8408613D0
Authority
GB
United Kingdom
Prior art keywords
optical discs
recorded tracks
following recorded
following
tracks
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.)
Withdrawn
Application number
GB848408613A
Other versions
GB2137746A (en
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.)
HP Inc
Original Assignee
Hewlett Packard Co
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 Hewlett Packard Co filed Critical Hewlett Packard Co
Publication of GB8408613D0 publication Critical patent/GB8408613D0/en
Publication of GB2137746A publication Critical patent/GB2137746A/en
Withdrawn legal-status Critical Current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
    • G11B7/12—Heads, e.g. forming of the optical beam spot or modulation of the optical beam
    • 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
    • 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
    • G11B7/0903—Multi-beam 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
    • G11B7/12—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
GB08408613A 1983-04-05 1984-04-04 Apparatus for Detecting Deviations of Position from a Reference Withdrawn GB2137746A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US48265383A 1983-04-05 1983-04-05

Publications (2)

Publication Number Publication Date
GB8408613D0 true GB8408613D0 (en) 1984-05-16
GB2137746A GB2137746A (en) 1984-10-10

Family

ID=23916898

Family Applications (1)

Application Number Title Priority Date Filing Date
GB08408613A Withdrawn GB2137746A (en) 1983-04-05 1984-04-04 Apparatus for Detecting Deviations of Position from a Reference

Country Status (2)

Country Link
JP (1) JPS59207035A (en)
GB (1) GB2137746A (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5073888A (en) * 1988-04-21 1991-12-17 Ricoh Company, Ltd. Optical pickup device
DE4221705A1 (en) * 1992-07-02 1994-01-05 Voith Gmbh J M Hydrostatic machine with axial thrust compensation
DE4301827A1 (en) * 1993-01-23 1994-07-28 Thomson Brandt Gmbh Eliminate scanning interference
CN101587244B (en) * 2008-05-20 2011-10-05 台睿科技股份有限公司 Device and method for correcting optical system assembling

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2102027C2 (en) * 1971-01-16 1982-12-30 Ibm Deutschland Gmbh, 7000 Stuttgart Process for the optical detection of the position of boundary lines and facilities for carrying out the process
US3865483A (en) * 1974-03-21 1975-02-11 Ibm Alignment illumination system
DE2539206A1 (en) * 1975-09-03 1977-03-17 Siemens Ag METHOD FOR AUTOMATIC ADJUSTMENT OF SEMI-CONDUCTOR DISCS
US4184080A (en) * 1977-06-30 1980-01-15 Molins Machine Company, Inc. Ratiometric edge detector system

Also Published As

Publication number Publication date
GB2137746A (en) 1984-10-10
JPS59207035A (en) 1984-11-24

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Legal Events

Date Code Title Description
WAP Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1)