DE68921065D1 - Optischer kopf. - Google Patents

Optischer kopf.

Info

Publication number
DE68921065D1
DE68921065D1 DE68921065T DE68921065T DE68921065D1 DE 68921065 D1 DE68921065 D1 DE 68921065D1 DE 68921065 T DE68921065 T DE 68921065T DE 68921065 T DE68921065 T DE 68921065T DE 68921065 D1 DE68921065 D1 DE 68921065D1
Authority
DE
Germany
Prior art keywords
optical head
optical
head
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
DE68921065T
Other languages
English (en)
Other versions
DE68921065T2 (de
Inventor
Seiji Nishiwaki
Yoshinao Moriguchihai Taketomi
Shinji - - Uchida
Takaaki Koeijyubiru Tomita
Junichi Asada
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.)
Panasonic Holdings Corp
Original Assignee
Matsushita Electric Industrial 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 Matsushita Electric Industrial Co Ltd filed Critical Matsushita Electric Industrial Co Ltd
Publication of DE68921065D1 publication Critical patent/DE68921065D1/de
Application granted granted Critical
Publication of DE68921065T2 publication Critical patent/DE68921065T2/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
    • G11B7/1365—Separate or integrated refractive elements, e.g. wave plates
    • 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
    • G11B7/123—Integrated head arrangements, e.g. with source and detectors mounted on the same substrate
    • G11B7/124—Integrated head arrangements, e.g. with source and detectors mounted on the same substrate the integrated head arrangements including waveguides
    • 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
    • G11B7/1384—Fibre optics
    • 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
    • G11B7/1398—Means for shaping the cross-section of the beam, e.g. into circular or elliptical cross-section

Landscapes

  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Optical Head (AREA)
DE68921065T 1988-08-05 1989-08-02 Optischer kopf. Expired - Fee Related DE68921065T2 (de)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
JP19658388 1988-08-05
JP17012389 1989-06-30
PCT/JP1989/000796 WO1990001768A1 (en) 1988-08-05 1989-08-02 Optical head

Publications (2)

Publication Number Publication Date
DE68921065D1 true DE68921065D1 (de) 1995-03-23
DE68921065T2 DE68921065T2 (de) 1995-09-28

Family

ID=26493217

Family Applications (1)

Application Number Title Priority Date Filing Date
DE68921065T Expired - Fee Related DE68921065T2 (de) 1988-08-05 1989-08-02 Optischer kopf.

Country Status (5)

Country Link
US (1) US5200939A (de)
EP (1) EP0394461B1 (de)
KR (1) KR930002165B1 (de)
DE (1) DE68921065T2 (de)
WO (1) WO1990001768A1 (de)

Families Citing this family (35)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR930010473B1 (ko) * 1989-09-22 1993-10-25 마쯔시다덴기산교 가부시기가이샤 편광소자 및 그것을 사용한 광학헤드장치
TW198114B (de) * 1991-04-23 1993-01-11 Philips Nv
US5204516A (en) * 1991-04-23 1993-04-20 U.S. Philips Corporation Planar optical scanning head having deficiency-correcting grating
JPH05205486A (ja) * 1991-04-26 1993-08-13 Naohiro Tanno 光導波路記録媒体及び光再生装置
US5285508A (en) * 1992-01-14 1994-02-08 Pioneer Electronic Corporation Optical wavelength converter
US5448536A (en) * 1992-06-16 1995-09-05 Hitachi, Ltd. Magneto-optical recording device having an optical head capable of generating a circularly polarized light beam
US5521995A (en) * 1993-01-15 1996-05-28 Eastman Kodak Company Segmented waveguide gratings used as optical tilt and displacement sensors
US5357591A (en) * 1993-04-06 1994-10-18 Yuan Jiang Cylindrical-wave controlling, generating and guiding devices
JP3267748B2 (ja) * 1993-06-08 2002-03-25 パイオニア株式会社 情報再生方法及び光検出器
US5495462A (en) * 1993-06-18 1996-02-27 Matsushita Electric Industrial Co., Ltd. Light beam splitting apparatus
JP2716000B2 (ja) * 1995-06-23 1998-02-18 日本電気株式会社 光ヘッド
KR0166232B1 (ko) * 1995-11-27 1999-03-20 배순훈 초소형 광 픽-업장치
KR0166233B1 (ko) * 1995-11-27 1999-03-20 배순훈 초소형 듀얼 포커스 광 픽-업장치
JPH10172173A (ja) * 1996-12-06 1998-06-26 Samsung Electron Co Ltd 光ピックアップ装置
US6963597B2 (en) * 2000-04-28 2005-11-08 Photodigm, Inc. Grating-outcoupled surface-emitting lasers
US6714575B2 (en) * 2001-03-05 2004-03-30 Photodigm, Inc. Optical modulator system
US6788847B2 (en) * 2001-04-05 2004-09-07 Luxtera, Inc. Photonic input/output port
US6834152B2 (en) * 2001-09-10 2004-12-21 California Institute Of Technology Strip loaded waveguide with low-index transition layer
US6839488B2 (en) * 2001-09-10 2005-01-04 California Institute Of Technology Tunable resonant cavity based on the field effect in semiconductors
US7082235B2 (en) * 2001-09-10 2006-07-25 California Institute Of Technology Structure and method for coupling light between dissimilar waveguides
JP2004031508A (ja) * 2002-06-24 2004-01-29 Nec Corp 光電気複合モジュールおよびそのモジュールを構成要素とする光入出力装置
US7260289B1 (en) 2003-02-11 2007-08-21 Luxtera, Inc. Optical waveguide grating coupler with varying scatter cross sections
US7245803B2 (en) * 2003-02-11 2007-07-17 Luxtera, Inc. Optical waveguide grating coupler
US7184625B2 (en) * 2003-02-11 2007-02-27 Luxtera, Inc Optical waveguide grating coupler incorporating reflective optical elements and anti-reflection elements
US7006732B2 (en) * 2003-03-21 2006-02-28 Luxtera, Inc. Polarization splitting grating couplers
US7773836B2 (en) 2005-12-14 2010-08-10 Luxtera, Inc. Integrated transceiver with lightpipe coupler
US7315679B2 (en) * 2004-06-07 2008-01-01 California Institute Of Technology Segmented waveguide structures
US7826688B1 (en) 2005-10-21 2010-11-02 Luxtera, Inc. Enhancing the sensitivity of resonant optical modulating and switching devices
US7559701B2 (en) * 2007-03-19 2009-07-14 General Electric Company High-temperature pressure sensor and method of assembly
GB0800835D0 (en) * 2008-01-17 2008-02-27 Cardioprec Ltd Retractor
GB201015746D0 (en) * 2010-09-21 2010-10-27 Cardioprec Ltd Optical switch
US10433960B1 (en) 2015-05-07 2019-10-08 Cardioprecision Limited Method and system for transcatheter intervention
US9659590B1 (en) 2015-10-30 2017-05-23 Seagate Technology Llc Angled near-field transducer and waveguide
US9659591B1 (en) 2016-01-14 2017-05-23 Seagate Technology Llc Polynomial spiral waveguide that facilitates coupling light to a near-field transducer at an oblique angle
US10170140B2 (en) 2017-01-23 2019-01-01 Seagate Technology Llc Waveguide having mode converter for heat-assisted magnetic recording device

Family Cites Families (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58118039A (ja) * 1982-01-06 1983-07-13 Hitachi Ltd 光デイスクトラツク追跡装置
DE3586076D1 (de) * 1984-09-03 1992-06-25 Omron Tateisi Electronics Co Vorrichtung zur verarbeitung optischer daten.
US4737946A (en) * 1984-09-03 1988-04-12 Omron Tateisi Electronics Co. Device for processing optical data with improved optical allignment means
DE3536497A1 (de) * 1984-10-16 1986-04-17 Mitsubishi Denki K.K., Tokio/Tokyo Vorrichtung zur erfassung von fokussierungsfehlern in einer kopfanordnung fuer optische scheiben
DE3683684D1 (de) * 1985-05-24 1992-03-12 Omron Tateisi Electronics Co Vorrichtung zur verarbeitung optischer daten.
US4699109A (en) * 1986-08-19 1987-10-13 Brunswick Corporation Closed end fuel injection system
JPS63183635A (ja) * 1986-09-05 1988-07-29 Ricoh Co Ltd 光学的情報記録再生装置
US4876680A (en) * 1986-09-05 1989-10-24 Ricoh Company, Ltd. Monolithic optical pick-up using an optical waveguide
JPS63164034A (ja) * 1986-12-26 1988-07-07 Matsushita Electric Ind Co Ltd 光導波路型光ピツクアツプ
JPS63173239A (ja) * 1987-01-12 1988-07-16 Seiko Epson Corp 光ピツクアツプ
US4868803A (en) * 1987-04-20 1989-09-19 Fuji Photo Film Co., Ltd. Magneto-optic pickup head including tracking and focusing error correction
KR920006309B1 (ko) * 1987-12-29 1992-08-03 마쓰시다 덴기 산교 가부시기가이샤 광학헤드 장치
JP2736894B2 (ja) * 1988-05-27 1998-04-02 株式会社日立製作所 光ピックアップ並びにそれを備えた光ディスク装置及びロータリエンコーダ
JP2644829B2 (ja) * 1988-06-24 1997-08-25 株式会社リコー 光情報記録再生装置

Also Published As

Publication number Publication date
KR900702518A (ko) 1990-12-07
EP0394461A4 (en) 1991-10-09
KR930002165B1 (ko) 1993-03-27
EP0394461A1 (de) 1990-10-31
US5200939A (en) 1993-04-06
DE68921065T2 (de) 1995-09-28
EP0394461B1 (de) 1995-02-08
WO1990001768A1 (en) 1990-02-22

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Legal Events

Date Code Title Description
8364 No opposition during term of opposition
8320 Willingness to grant licences declared (paragraph 23)
8339 Ceased/non-payment of the annual fee