JPH0582658B2 - - Google Patents

Info

Publication number
JPH0582658B2
JPH0582658B2 JP60149833A JP14983385A JPH0582658B2 JP H0582658 B2 JPH0582658 B2 JP H0582658B2 JP 60149833 A JP60149833 A JP 60149833A JP 14983385 A JP14983385 A JP 14983385A JP H0582658 B2 JPH0582658 B2 JP H0582658B2
Authority
JP
Japan
Prior art keywords
astigmatism
light
beam splitter
photodetector
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
JP60149833A
Other languages
English (en)
Japanese (ja)
Other versions
JPS629537A (ja
Inventor
Susumu Nomura
Takanori Maeda
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.)
Pioneer Corp
Original Assignee
Pioneer Electronic 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 Pioneer Electronic Corp filed Critical Pioneer Electronic Corp
Priority to JP60149833A priority Critical patent/JPS629537A/ja
Priority to DE8686305271T priority patent/DE3679460D1/de
Priority to EP86305271A priority patent/EP0208538B1/en
Priority to US06/883,396 priority patent/US4731527A/en
Publication of JPS629537A publication Critical patent/JPS629537A/ja
Publication of JPH0582658B2 publication Critical patent/JPH0582658B2/ja
Granted 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
    • G11B7/1381—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
    • G11B7/0908—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

Landscapes

  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Optical Recording Or Reproduction (AREA)
  • Optical Head (AREA)
  • Automatic Focus Adjustment (AREA)
JP60149833A 1985-07-08 1985-07-08 光学式ピツクアツプ装置 Granted JPS629537A (ja)

Priority Applications (4)

Application Number Priority Date Filing Date Title
JP60149833A JPS629537A (ja) 1985-07-08 1985-07-08 光学式ピツクアツプ装置
DE8686305271T DE3679460D1 (de) 1985-07-08 1986-07-08 Optischer aufnahmekopf mit astigmatischer fokussierung.
EP86305271A EP0208538B1 (en) 1985-07-08 1986-07-08 Optical pickup with astigmatic focusing
US06/883,396 US4731527A (en) 1985-07-08 1986-07-08 An astigmatic focusing system with optical elements oriented to produce astigmatism in a predetermined direction to maximize detector sensitivity

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP60149833A JPS629537A (ja) 1985-07-08 1985-07-08 光学式ピツクアツプ装置

Publications (2)

Publication Number Publication Date
JPS629537A JPS629537A (ja) 1987-01-17
JPH0582658B2 true JPH0582658B2 (US06818201-20041116-C00086.png) 1993-11-19

Family

ID=15483657

Family Applications (1)

Application Number Title Priority Date Filing Date
JP60149833A Granted JPS629537A (ja) 1985-07-08 1985-07-08 光学式ピツクアツプ装置

Country Status (4)

Country Link
US (1) US4731527A (US06818201-20041116-C00086.png)
EP (1) EP0208538B1 (US06818201-20041116-C00086.png)
JP (1) JPS629537A (US06818201-20041116-C00086.png)
DE (1) DE3679460D1 (US06818201-20041116-C00086.png)

Families Citing this family (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4778984A (en) * 1985-10-16 1988-10-18 Canon Denshi Kabushiki Kaisha Apparatus for detecting focus from astigmatism
US5189651A (en) * 1986-05-12 1993-02-23 Pioneer Electronic Corporation Optical system in magneto-optical recording and reproducing device
JPH0514334Y2 (US06818201-20041116-C00086.png) * 1986-10-01 1993-04-16
US4886959A (en) * 1986-11-27 1989-12-12 Canon Kabushiki Kaisha Optical information reproducing apparatus
US4973836A (en) * 1987-03-31 1990-11-27 Canon Kabushiki Kaisha Optical pickup device including a beam splitter having an inclined plane
JP2735220B2 (ja) * 1987-12-02 1998-04-02 株式会社日立製作所 非点収差を有する光束を用いた焦点ずれ検出方法及び光ディスク装置
EP0339722B1 (en) * 1988-04-26 1993-10-06 Koninklijke Philips Electronics N.V. Arrangement for optically scanning a magneto-optical carrier
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
US5036185A (en) * 1988-12-27 1991-07-30 Kabushiki Kaisha Toshiba Optical apparatus for detecting a focusing state
US5189452A (en) * 1991-12-09 1993-02-23 General Electric Company Real image projection system
JPH05173068A (ja) * 1991-12-20 1993-07-13 Olympus Optical Co Ltd 小型ズームレンズ
DE19501884B4 (de) * 1994-02-03 2005-07-21 Carl Zeiss Optische Anordnung
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
JP3617256B2 (ja) * 1997-06-20 2005-02-02 ソニー株式会社 光ピックアップ及び光ピックアップの製造方法
JPH11176019A (ja) * 1997-10-06 1999-07-02 Fujitsu Ltd 光学的情報記憶装置
JP3626003B2 (ja) * 1997-10-06 2005-03-02 富士通株式会社 光学的情報記憶装置
US6286962B1 (en) 1998-12-23 2001-09-11 Thomas Hennes, Inc. Beamsplitter optical projection system
US7164624B2 (en) * 2001-10-16 2007-01-16 Koninklijke Philips Electronics N.V. Optical scanning device
JP2004342145A (ja) * 2003-05-13 2004-12-02 Funai Electric Co Ltd 光ピックアップ移動体および光ディスク装置ならびに光ディスク装置の製造方法
KR100503007B1 (ko) * 2003-06-24 2005-07-21 삼성전기주식회사 광픽업용 액추에이터의 부공진 측정 장치

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61202339A (ja) * 1985-03-05 1986-09-08 Konishiroku Photo Ind Co Ltd 光ピツクアツプ

Family Cites Families (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2311326A2 (fr) * 1974-01-15 1976-12-10 Thomson Brandt Dispositif de focalisation et lecteur optique comportant un tel dispositif
US4079247A (en) * 1975-05-16 1978-03-14 Claude Bricot Optical focussing device
GB1532345A (en) * 1976-06-25 1978-11-15 Hitachi Ltd Information play-back apparatus
NL7708200A (nl) * 1976-07-28 1978-01-31 Hitachi Ltd Automatische scherpstellingsinrichting.
NL7907216A (nl) * 1979-09-28 1981-03-31 Philips Nv Optisch fokusfout-detektiestelsel.
JPS573235A (en) * 1980-06-07 1982-01-08 Ricoh Co Ltd Focus controlling method
JPS5897730U (ja) * 1981-12-24 1983-07-02 ヤマハ株式会社 光学式情報記録再生装置における自動焦点装置
JPS59119548A (ja) * 1982-12-25 1984-07-10 Pioneer Electronic Corp 光学式ピツクアツプ装置
JPS59167863A (ja) * 1983-03-14 1984-09-21 Minolta Camera Co Ltd 光デイスク用光学系
JPS6043229A (ja) * 1983-08-17 1985-03-07 Sankyo Seiki Mfg Co Ltd 光学式記録情報再生装置のピツクアツプ
JPS6055521A (ja) * 1983-09-05 1985-03-30 Mitsubishi Electric Corp 光デイスクヘツドの自動焦点調節装置
JPS6095733A (ja) * 1983-10-31 1985-05-29 Hitachi Ltd 光学的信号処理装置
JPS61236035A (ja) * 1985-04-09 1986-10-21 Sony Corp 光学ヘツド

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61202339A (ja) * 1985-03-05 1986-09-08 Konishiroku Photo Ind Co Ltd 光ピツクアツプ

Also Published As

Publication number Publication date
DE3679460D1 (de) 1991-07-04
EP0208538A1 (en) 1987-01-14
EP0208538B1 (en) 1991-05-29
JPS629537A (ja) 1987-01-17
US4731527A (en) 1988-03-15

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Legal Events

Date Code Title Description
LAPS Cancellation because of no payment of annual fees