AU4963585A - Apparatus for detecting tracking error of an optical head - Google Patents

Apparatus for detecting tracking error of an optical head

Info

Publication number
AU4963585A
AU4963585A AU49635/85A AU4963585A AU4963585A AU 4963585 A AU4963585 A AU 4963585A AU 49635/85 A AU49635/85 A AU 49635/85A AU 4963585 A AU4963585 A AU 4963585A AU 4963585 A AU4963585 A AU 4963585A
Authority
AU
Australia
Prior art keywords
optical head
tracking error
detecting tracking
detecting
error
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.)
Abandoned
Application number
AU49635/85A
Inventor
Shintani Kenji
Yamada Takatoshi
Fukumoto Atsushi
Ohsato Kiyoshi
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.)
Sony Corp
Original Assignee
Sony Corp
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 Sony Corp filed Critical Sony Corp
Publication of AU4963585A publication Critical patent/AU4963585A/en
Abandoned 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
    • G11B7/135—Means for guiding the beam from the source to the record carrier or from the record carrier to the detector
    • G11B7/1353—Diffractive elements, e.g. holograms or gratings
    • 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
    • G11B7/08—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
    • G11B7/095—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 specially adapted for discs, e.g. for compensation of eccentricity or wobble
    • G11B7/0956—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 specially adapted for discs, e.g. for compensation of eccentricity or wobble to compensate for tilt, skew, warp or inclination of the disc, i.e. maintain the optical axis at right angles to the disc
    • 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
    • G11B7/135—Means for guiding the beam from the source to the record carrier or from the record carrier to the detector
AU49635/85A 1984-10-04 1985-10-03 Apparatus for detecting tracking error of an optical head Abandoned AU4963585A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP59208936A JP2575099B2 (en) 1984-10-04 1984-10-04 Optical head tracking error detector
JP59-208936 1984-10-04

Publications (1)

Publication Number Publication Date
AU4963585A true AU4963585A (en) 1986-04-17

Family

ID=16564584

Family Applications (1)

Application Number Title Priority Date Filing Date
AU49635/85A Abandoned AU4963585A (en) 1984-10-04 1985-10-03 Apparatus for detecting tracking error of an optical head

Country Status (3)

Country Link
JP (1) JP2575099B2 (en)
AU (1) AU4963585A (en)
WO (1) WO1986002191A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU585770B2 (en) * 1985-06-10 1989-06-22 N.V. Philips Gloeilampenfabrieken Optical scanning unit comprising a translational-position and angular-position detection system for an electromagnetically suspended objective.

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH07105055B2 (en) * 1985-11-20 1995-11-13 三菱電機株式会社 Optical head device
US4835761A (en) * 1985-11-20 1989-05-30 Mitsubishi Denki Kabushiki Kaisha Signal to noise ratio of optical head apparatus employing semiconductor laser beam source
JP4930718B2 (en) * 2007-09-13 2012-05-16 セイコーエプソン株式会社 Display support device, electronic equipment

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL7506495A (en) * 1975-06-02 1976-12-06 Philips Nv DEVICE FOR READING A REGISTRATION MEDIA.

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU585770B2 (en) * 1985-06-10 1989-06-22 N.V. Philips Gloeilampenfabrieken Optical scanning unit comprising a translational-position and angular-position detection system for an electromagnetically suspended objective.

Also Published As

Publication number Publication date
WO1986002191A1 (en) 1986-04-10
JPS6187225A (en) 1986-05-02
JP2575099B2 (en) 1997-01-22

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