FR2601173B1 - Tete de lecture optique pour disques numeriques. - Google Patents

Tete de lecture optique pour disques numeriques.

Info

Publication number
FR2601173B1
FR2601173B1 FR878709333A FR8709333A FR2601173B1 FR 2601173 B1 FR2601173 B1 FR 2601173B1 FR 878709333 A FR878709333 A FR 878709333A FR 8709333 A FR8709333 A FR 8709333A FR 2601173 B1 FR2601173 B1 FR 2601173B1
Authority
FR
France
Prior art keywords
reading head
optical reading
digital discs
discs
digital
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
FR878709333A
Other languages
English (en)
Other versions
FR2601173A1 (fr
Inventor
Ryoichi Kawasaki
Noriyoshi Ooyama
Masami Shimizu
Kouzou Suzuki
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.)
Sanyo Electric Co Ltd
Original Assignee
Sanyo Electric Co Ltd
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 Sanyo Electric Co Ltd filed Critical Sanyo Electric Co Ltd
Publication of FR2601173A1 publication Critical patent/FR2601173A1/fr
Application granted granted Critical
Publication of FR2601173B1 publication Critical patent/FR2601173B1/fr
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
    • G11B7/08—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
    • G11B7/12—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
    • G11B7/1365—Separate or integrated refractive elements, e.g. wave plates

Landscapes

  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Optical Recording Or Reproduction (AREA)
  • Optical Head (AREA)
  • Automatic Focus Adjustment (AREA)
FR878709333A 1986-07-01 1987-07-01 Tete de lecture optique pour disques numeriques. Expired - Lifetime FR2601173B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP61154814A JPS6310326A (ja) 1986-07-01 1986-07-01 光ピツクアツプ装置

Publications (2)

Publication Number Publication Date
FR2601173A1 FR2601173A1 (fr) 1988-01-08
FR2601173B1 true FR2601173B1 (fr) 1992-09-04

Family

ID=15592460

Family Applications (1)

Application Number Title Priority Date Filing Date
FR878709333A Expired - Lifetime FR2601173B1 (fr) 1986-07-01 1987-07-01 Tete de lecture optique pour disques numeriques.

Country Status (3)

Country Link
US (1) US4767921A (fr)
JP (1) JPS6310326A (fr)
FR (1) FR2601173B1 (fr)

Families Citing this family (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0748268B2 (ja) * 1988-05-12 1995-05-24 三菱電機株式会社 光ピックアップ装置
JPH0677332B2 (ja) * 1988-05-31 1994-09-28 株式会社三協精機製作所 光ピックアップ
JPH064412Y2 (ja) * 1988-07-27 1994-02-02 パイオニア株式会社 光ピックアップ装置
US5144614A (en) * 1988-10-29 1992-09-01 Sony Corporation Optical pickup device
JP2797345B2 (ja) * 1988-10-29 1998-09-17 ソニー株式会社 光ピックアップ装置及び光ディスク装置
JP2682087B2 (ja) * 1988-11-22 1997-11-26 ソニー株式会社 光学ピックアップ装置
JP2610995B2 (ja) * 1989-05-25 1997-05-14 株式会社ゼクセル 車両用空調装置
US5412634A (en) * 1990-02-16 1995-05-02 Deutsche Thomson-Brandt Gmbh Optical scanning device for a disc player including improved focusing apparatus
US5237556A (en) * 1991-12-24 1993-08-17 Samsung Electronics Co., Ltd. Wide beam detector system for optical memories
EP0749119A3 (fr) * 1995-05-31 1997-08-20 Daewoo Electronics Co Ltd Appareil de lecture optique
JP3456809B2 (ja) * 1995-10-30 2003-10-14 シャープ株式会社 光導波路素子、光導波路素子への結合方法、光ピックアップ装置
JP3536914B2 (ja) * 2000-09-26 2004-06-14 船井電機株式会社 ディスクプレーヤーのピックアップ装置
JP3528176B2 (ja) * 2001-01-30 2004-05-17 船井電機株式会社 光ピックアップのハーフミラー固定装置
JP2004227657A (ja) * 2003-01-22 2004-08-12 Sharp Corp 光ピックアップ装置および光ディスク装置
KR100933291B1 (ko) * 2003-09-20 2009-12-22 삼성전자주식회사 2파장 레이저 다이오드의 사용을 위한 광검출기
JP3997324B2 (ja) * 2004-04-28 2007-10-24 船井電機株式会社 光ピックアップにおける全反射ミラーの取付構造
JP2007141362A (ja) * 2005-11-18 2007-06-07 Funai Electric Co Ltd 光ヘッド
US8648999B2 (en) 2010-07-22 2014-02-11 Cymer, Llc Alignment of light source focus
EP3563118A4 (fr) * 2016-12-28 2020-07-08 Michael Naor Système de codeur optique et procédé associé

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL7703076A (nl) * 1977-03-22 1978-09-26 Philips Nv Inrichting voor het uitlezen van een stralings- reflekterende registratiedrager.
FR2498341A1 (fr) * 1981-01-20 1982-07-23 Thomson Csf Dispositif optique detecteur d'ecart de focalisation et enregistreur lecteur optique comportant un tel dispositif
DE3280137D1 (de) * 1981-09-17 1990-04-19 Toshiba Kawasaki Kk Ein optischer kopf.
JPS59167861A (ja) * 1983-03-14 1984-09-21 Sony Corp 光学式デイスク・プレ−ヤ−のトラツキング制御装置
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.
JPS6139942A (ja) * 1984-08-01 1986-02-26 Matsushita Electric Ind Co Ltd 光ピツクアツプ

Also Published As

Publication number Publication date
JPS6310326A (ja) 1988-01-16
FR2601173A1 (fr) 1988-01-08
US4767921A (en) 1988-08-30

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