DE3784342D1 - Lagedetektor des optischen brennpunktes eines optischen daten-speicher-/lesegeraetes. - Google Patents

Lagedetektor des optischen brennpunktes eines optischen daten-speicher-/lesegeraetes.

Info

Publication number
DE3784342D1
DE3784342D1 DE8787905647T DE3784342T DE3784342D1 DE 3784342 D1 DE3784342 D1 DE 3784342D1 DE 8787905647 T DE8787905647 T DE 8787905647T DE 3784342 T DE3784342 T DE 3784342T DE 3784342 D1 DE3784342 D1 DE 3784342D1
Authority
DE
Germany
Prior art keywords
optical
reader
data storage
position detector
focus
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
DE8787905647T
Other languages
English (en)
Other versions
DE3784342T2 (de
Inventor
Teruo Fujita
Denki Kabushiki K N Mitsubishi
Jp Kyoto
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.)
Mitsubishi Electric Corp
Original Assignee
Mitsubishi Electric 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 Mitsubishi Electric Corp filed Critical Mitsubishi Electric Corp
Publication of DE3784342D1 publication Critical patent/DE3784342D1/de
Application granted granted Critical
Publication of DE3784342T2 publication Critical patent/DE3784342T2/de
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • G11B7/125—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
    • 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
    • G11B7/0908—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
    • 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
    • G11B7/0917—Focus-error methods other than those covered by G11B7/0909 - G11B7/0916
    • 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

Landscapes

  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Optical Recording Or Reproduction (AREA)
  • Automatic Focus Adjustment (AREA)
DE8787905647T 1986-08-29 1987-08-26 Lagedetektor des optischen brennpunktes eines optischen daten-speicher-/lesegeraetes. Expired - Lifetime DE3784342T2 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP61204261A JPH0640392B2 (ja) 1986-08-29 1986-08-29 光学式情報記録再生装置の集光スポツト位置検出装置
PCT/JP1987/000632 WO1988001784A1 (en) 1986-08-29 1987-08-26 Focal spot position detector of an optical data recording/reproducing apparatus

Publications (2)

Publication Number Publication Date
DE3784342D1 true DE3784342D1 (de) 1993-04-01
DE3784342T2 DE3784342T2 (de) 1993-08-12

Family

ID=16487533

Family Applications (1)

Application Number Title Priority Date Filing Date
DE8787905647T Expired - Lifetime DE3784342T2 (de) 1986-08-29 1987-08-26 Lagedetektor des optischen brennpunktes eines optischen daten-speicher-/lesegeraetes.

Country Status (5)

Country Link
US (2) US4888757A (de)
EP (1) EP0285661B1 (de)
JP (1) JPH0640392B2 (de)
DE (1) DE3784342T2 (de)
WO (1) WO1988001784A1 (de)

Families Citing this family (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0640392B2 (ja) * 1986-08-29 1994-05-25 三菱電機株式会社 光学式情報記録再生装置の集光スポツト位置検出装置
EP0317224B1 (de) * 1987-11-17 1993-08-04 Matsushita Electric Industrial Co., Ltd. Fokusregelsystem für optische Scheibenvorrichtung mit lichtempfindlichen Elementen in der Fokusebene des Bildes der Informationsstruktur
EP0383237B1 (de) * 1989-02-13 1996-02-07 Omron Corporation Aufnahme-/Wiedergabegerät für optische Karte
JP2923331B2 (ja) * 1990-06-12 1999-07-26 オリンパス光学工業株式会社 光記録媒体及びその再生装置
KR930009220B1 (ko) * 1991-08-20 1993-09-24 주식회사 금성사 광학기기의 옵티컬 픽-업장치
US5511052A (en) * 1992-05-11 1996-04-23 Eastman Kodak Company Digital compensator for controlling a servo to correct the value of a given parameter of a system
JP3612385B2 (ja) * 1995-07-07 2005-01-19 松下電器産業株式会社 光ディスク装置
GB2355354A (en) * 1999-08-03 2001-04-18 Axon Instr Inc Auto-focus method
US7831518B2 (en) * 2001-11-20 2010-11-09 Psi Systems, Inc. Systems and methods for detecting postage fraud using an indexed lookup procedure
US7225984B2 (en) * 2003-02-20 2007-06-05 Harris Rodney C Systems and methods for providing multiple object planes in an optical image scanning environment
JP4846339B2 (ja) * 2004-10-26 2011-12-28 ダイセン・メンブレン・システムズ株式会社 散気装置および散気システム
JP4716805B2 (ja) * 2005-06-23 2011-07-06 三菱電線工業株式会社 多孔膜材及び散気装置
JP4704881B2 (ja) * 2005-10-13 2011-06-22 ダイセン・メンブレン・システムズ株式会社 散気装置
JP4726253B2 (ja) * 2006-03-30 2011-07-20 パイオニア株式会社 光ピックアップ及び情報機器
JP5207240B2 (ja) * 2008-08-11 2013-06-12 学校法人金井学園 光記録再生媒体の焦点誤差検出方法、およびそれに用いる発光装置のビーム分割調節器

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL177157C (nl) * 1975-02-28 1985-08-01 Philips Nv Inrichting voor het uitlezen van een vlakke registratiedrager met een optisch uitleesbare informatiestruktuur.
NL8103117A (nl) * 1981-06-29 1983-01-17 Philips Nv Inrichting voor het beschrijven en/of uitlezen van een registratiedrager.
US4464567A (en) * 1981-06-30 1984-08-07 Storage Technology Corporation Photoelectric information and focus detector
JPS58208944A (ja) * 1982-05-31 1983-12-05 Sony Corp 光学ヘツド制御信号発生装置
US4805162A (en) * 1982-11-01 1989-02-14 Storage Technology Partners Ii Fine and coarse servo system for access and tracking on an optical disk
DE3675609D1 (de) * 1985-08-27 1990-12-20 Siemens Ag Positioniereinrichtung fuer einen optischen plattenspeicher.
JPH0640392B2 (ja) * 1986-08-29 1994-05-25 三菱電機株式会社 光学式情報記録再生装置の集光スポツト位置検出装置
JPH0773626B2 (ja) * 1992-08-20 1995-08-09 邦雄 毒島 弾球遊技機
JPH06102096B2 (ja) * 1992-08-20 1994-12-14 邦雄 毒島 弾球遊技機

Also Published As

Publication number Publication date
WO1988001784A1 (en) 1988-03-10
EP0285661A1 (de) 1988-10-12
DE3784342T2 (de) 1993-08-12
EP0285661B1 (de) 1993-02-24
US4999826A (en) 1991-03-12
EP0285661A4 (de) 1989-07-25
JPS6358627A (ja) 1988-03-14
JPH0640392B2 (ja) 1994-05-25
US4888757A (en) 1989-12-19

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