DE3850312T2 - Fokussierungsservoschaltung in einem optischen Plattenspieler. - Google Patents

Fokussierungsservoschaltung in einem optischen Plattenspieler.

Info

Publication number
DE3850312T2
DE3850312T2 DE3850312T DE3850312T DE3850312T2 DE 3850312 T2 DE3850312 T2 DE 3850312T2 DE 3850312 T DE3850312 T DE 3850312T DE 3850312 T DE3850312 T DE 3850312T DE 3850312 T2 DE3850312 T2 DE 3850312T2
Authority
DE
Germany
Prior art keywords
servo circuit
focusing servo
optical turntable
turntable
optical
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 - Fee Related
Application number
DE3850312T
Other languages
English (en)
Other versions
DE3850312D1 (de
Inventor
Wai-Hon Lee
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.)
Koninklijke Philips NV
Original Assignee
Philips Gloeilampenfabrieken NV
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 Philips Gloeilampenfabrieken NV filed Critical Philips Gloeilampenfabrieken NV
Publication of DE3850312D1 publication Critical patent/DE3850312D1/de
Application granted granted Critical
Publication of DE3850312T2 publication Critical patent/DE3850312T2/de
Anticipated expiration legal-status Critical
Expired - Fee Related 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
    • G11B7/0908—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 focusing only
    • G11B7/0909—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 focusing only by astigmatic methods
    • 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
    • G11B7/0908—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 focusing only
    • G11B7/0916—Foucault or knife-edge methods
    • 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
    • G11B7/094—Methods and circuits for servo offset compensation
    • 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
    • G11B7/13—Optical detectors 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
    • G11B7/12—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
    • G11B7/1372—Lenses
    • G11B7/1378—Separate aberration correction lenses; Cylindrical lenses to generate astigmatism; Beam expanders
    • 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
    • G11B7/1381—Non-lens elements for altering the properties of the beam, e.g. knife edges, slits, filters or stops
    • 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
DE3850312T 1987-07-29 1988-07-18 Fokussierungsservoschaltung in einem optischen Plattenspieler. Expired - Fee Related DE3850312T2 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US07/079,653 US4879706A (en) 1987-07-29 1987-07-29 Method and apparatus for focus and tracking in an optical disk system

Publications (2)

Publication Number Publication Date
DE3850312D1 DE3850312D1 (de) 1994-07-28
DE3850312T2 true DE3850312T2 (de) 1995-01-26

Family

ID=22151935

Family Applications (1)

Application Number Title Priority Date Filing Date
DE3850312T Expired - Fee Related DE3850312T2 (de) 1987-07-29 1988-07-18 Fokussierungsservoschaltung in einem optischen Plattenspieler.

Country Status (4)

Country Link
US (1) US4879706A (de)
EP (1) EP0301643B1 (de)
JP (1) JPH01125731A (de)
DE (1) DE3850312T2 (de)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5315574A (en) * 1988-10-28 1994-05-24 Matsushita Electric Industrial Co., Ltd. Optical head with polarized beam hologram
DE69031599T2 (de) * 1989-02-13 1998-05-28 Omron Tateisi Electronics Co Datenaufzeichnungs-/Wiedergabevorrichtung für optische Karte
JP2657413B2 (ja) * 1989-03-03 1997-09-24 パイオニア株式会社 光ヘッド
US5050153A (en) * 1989-06-06 1991-09-17 Wai-Hon Lee Semiconductor laser optical head assembly
US5563868A (en) * 1990-06-18 1996-10-08 Matsushita-Kotobuki Electronics Industries, Ltd. Optical servo system for magnetic disk
US5420848A (en) * 1990-08-02 1995-05-30 Canon Kabushiki Kaisha Optical system for optical information recording/reproducing apparatus having a galvano mirror
JP3430048B2 (ja) 1998-12-24 2003-07-28 日本電気株式会社 光学的情報記録再生装置
JP2005534133A (ja) * 2002-07-25 2005-11-10 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 光学走査装置
KR20060028422A (ko) * 2003-06-26 2006-03-29 코닌클리케 필립스 일렉트로닉스 엔.브이. 광 디스크 드라이브
US7280232B2 (en) * 2004-09-21 2007-10-09 Chapman Instruments, Inc. Method and apparatus for measuring wafer thickness

Family Cites Families (33)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3701602A (en) * 1971-04-30 1972-10-31 Grumman Aerospace Corp Multi-axis optical alignment system including a spatial filter
NL7302941A (de) * 1973-03-02 1974-09-04
DE2418195A1 (de) * 1974-04-13 1975-11-06 Bosch Gmbh Robert Verfahren zur fuehrung eines lichtstrahls auf einer signalspur
NL182257C (nl) * 1974-12-23 1988-02-01 Philips Nv Inrichting voor het uitlezen van een vlakke reflekterende registratiedrager waarop informatie is aangebracht in een optisch uitleesbare struktuur.
JPS6011374B2 (ja) * 1975-02-05 1985-03-25 株式会社日立製作所 情報再生方法及びその装置
NL182990C (nl) * 1975-07-07 1988-06-16 Philips Nv Inrichting voor het uitlezen van een stralingsreflekterende registratiedrager.
GB1532345A (en) * 1976-06-25 1978-11-15 Hitachi Ltd Information play-back apparatus
NL7703077A (nl) * 1977-03-22 1978-09-26 Philips Nv Inrichting voor het uitlezen van een stralings- reflekterende registratiedrager.
JPS5465007A (en) * 1977-11-02 1979-05-25 Matsushita Electric Ind Co Ltd Disc form recording carrier reader
US4241423A (en) * 1978-12-22 1980-12-23 Rca Corporation Optical memory with injection laser as light source and detector
JPS5647933A (en) * 1979-09-25 1981-04-30 Sony Corp Optical signal head
NL7907216A (nl) * 1979-09-28 1981-03-31 Philips Nv Optisch fokusfout-detektiestelsel.
DE3042676A1 (de) * 1979-11-12 1981-05-21 Mansei Kogyo K.K., Kawaguchi, Saitama Abtastvorrichtung zur verwendung in einem geraet zum lesen von video- und/oder tonfrequenzinformation
JPS5690434A (en) * 1979-12-19 1981-07-22 Hitachi Ltd Optical information reproducing device
JPS57111837A (en) * 1980-12-27 1982-07-12 Olympus Optical Co Ltd Signal detecting system of optical information reader
JPS57120240A (en) * 1981-01-16 1982-07-27 Sony Corp Optical disk player
JPS57181433A (en) * 1981-04-22 1982-11-08 Olympus Optical Co Ltd Tracking system for optical disc reproducer
JPS57176544A (en) * 1981-04-23 1982-10-29 Olympus Optical Co Ltd Still reproducing system for optical video disc reproducer
JPS57195634U (de) * 1981-06-05 1982-12-11
JPS587230A (ja) * 1981-07-06 1983-01-17 アロカ株式会社 内視用超音波探触子
DE3280137D1 (de) * 1981-09-17 1990-04-19 Toshiba Kawasaki Kk Ein optischer kopf.
US4417330A (en) * 1981-10-15 1983-11-22 Burroughs Corporation Optical memory system providing improved focusing control
US4443870A (en) * 1981-10-15 1984-04-17 Burroughs Corporation Optical memory system providing track following
JPS5873023A (ja) * 1981-10-27 1983-05-02 Pioneer Electronic Corp 情報読取装置におけるトラツキングサ−ボ信号発生装置
NL8105579A (nl) * 1981-12-11 1983-07-01 Philips Nv Optisch fokusfoutdetektiestelsel.
US4446546A (en) * 1981-12-31 1984-05-01 Magnetic Peripherals Inc. Focus initialization system for optical recording
US4435797A (en) * 1982-02-17 1984-03-06 Burroughs Corporation Optical memory system having track following and seeking capabilities
JPS58220248A (ja) * 1982-06-15 1983-12-21 Nippon Kogaku Kk <Nikon> 光学式ピツクアツプ
JPS5922245A (ja) * 1982-07-28 1984-02-04 Mitsubishi Electric Corp 光ピツプアツプ
JPS59110045A (ja) * 1982-12-13 1984-06-25 Sanyo Electric Co Ltd 光学式ピツクアツプ装置
NL8400674A (nl) * 1984-03-02 1985-10-01 Philips Nv Inrichting voor het inschrijven en/of uitlezen van informatie in een spoor van een reflekterende registratiedrager, met een fokusregeling met verminderde spot offsetgevoeligheid.
JPS6299922A (ja) * 1985-10-28 1987-05-09 Nec Home Electronics Ltd 光磁気記録再生装置
JPS6432430A (en) * 1987-07-28 1989-02-02 Sony Corp Optical recording and reproducing device

Also Published As

Publication number Publication date
DE3850312D1 (de) 1994-07-28
EP0301643A2 (de) 1989-02-01
EP0301643A3 (en) 1990-05-23
US4879706A (en) 1989-11-07
EP0301643B1 (de) 1994-06-22
JPH01125731A (ja) 1989-05-18

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Legal Events

Date Code Title Description
8327 Change in the person/name/address of the patent owner

Owner name: PHILIPS ELECTRONICS N.V., EINDHOVEN, NL

8364 No opposition during term of opposition
8339 Ceased/non-payment of the annual fee