DE68921065D1 - Optischer kopf. - Google Patents

Optischer kopf.

Info

Publication number: DE68921065D1
Authority: DE; Germany
Prior art keywords: optical head; optical; head
Prior art date: 1988-08-05
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.)

1988-08-05

Filing date

1989-08-02

Publication date

1995-03-23

1989-08-02 Application filed by Matsushita Electric Industrial Co Ltd filed Critical Matsushita Electric Industrial Co Ltd

1995-03-23 Application granted granted Critical

1995-03-23 Publication of DE68921065D1 publication Critical patent/DE68921065D1/de

1995-09-28 Publication of DE68921065T2 publication Critical patent/DE68921065T2/de

2009-08-03 Anticipated expiration legal-status Critical

Status Expired - Fee Related legal-status Critical Current

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
US5204516A (en) *	1991-04-23	1993-04-20	U.S. Philips Corporation	Planar optical scanning head having deficiency-correcting grating
TW198114B (de) *	1991-04-23	1993-01-11	Philips Nv
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
US7082235B2 (en) *	2001-09-10	2006-07-25	California Institute Of Technology	Structure and method for coupling light between dissimilar waveguides
US6990257B2 (en) *	2001-09-10	2006-01-24	California Institute Of Technology	Electronically biased strip loaded waveguide
WO2003023476A1 (en) *	2001-09-10	2003-03-20	California Institute Of Technology	Tuning the index of a waveguide structure
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
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
US7260289B1 (en)	2003-02-11	2007-08-21	Luxtera, Inc.	Optical waveguide grating coupler with varying scatter cross sections
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
EP0174008B1 (de) *	1984-09-03	1992-05-20	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
EP0288033B1 (de) *	1987-04-20	1993-04-07	Fuji Photo Film Co., Ltd.	Aufnahmekopf für magnetooptischen Aufzeichnungsträger
US4991919A (en) *	1987-12-29	1991-02-12	Matsushita Electric Industrial Co., Ltd.	Optical head apparatus including concentric, periodic grating in a waveguide
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

1989
- 1989-08-02 KR KR1019900700716A patent/KR930002165B1/ko not_active IP Right Cessation
- 1989-08-02 WO PCT/JP1989/000796 patent/WO1990001768A1/ja active IP Right Grant
- 1989-08-02 US US07/474,757 patent/US5200939A/en not_active Expired - Fee Related
- 1989-08-02 DE DE68921065T patent/DE68921065T2/de not_active Expired - Fee Related
- 1989-08-02 EP EP89909050A patent/EP0394461B1/de not_active Expired - Lifetime

Also Published As

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

Publication	Publication Date	Title
DE68921065D1 (de)	1995-03-23	Optischer kopf.
DE69023585D1 (de)	1995-12-21	Optischer Kopf.
DE68905687D1 (de)	1993-05-06	Kopfbaenderung.
DE3687392D1 (de)	1993-02-11	Optischer kopf.
DE58906535D1 (de)	1994-02-10	Stativkopf.
DE3887762D1 (de)	1994-03-24	Optischer Kopf.
DE68924303D1 (de)	1995-10-26	Optische Kopfanordnung.
DE69020417D1 (de)	1995-08-03	Optischer Kopf.
DE68919599D1 (de)	1995-01-12	Optischer Aufnahmekopf.
DE3776945D1 (de)	1992-04-09	Optischer kopf.
DE3852307D1 (de)	1995-01-12	Optischer kopf.
DE3680865D1 (de)	1991-09-19	Optischer kopf.
DE3785118D1 (de)	1993-05-06	Optischer wiedergabekopf.
ATE90610T1 (de)	1993-07-15	Scherkopf.
DE69021018D1 (de)	1995-08-24	Rotierbarer optischer Kopf.
FI864969L (fi)	1988-06-06	Laserhuvud.
DE3482146D1 (de)	1990-06-07	Optischer kopf.
DE69022447D1 (de)	1995-10-26	Optischer Kopf.
DE3784859D1 (de)	1993-04-22	Optischer kopf.
DE69022318D1 (de)	1995-10-19	Fliegender optischer Kopf.
DE68918076D1 (de)	1994-10-13	Integrierter optischer Druckerkopf.
DE3778670D1 (de)	1992-06-04	Optischer kopf.
DE68924120D1 (de)	1995-10-12	Optische Kopfanordnung.
DE69031418D1 (de)	1997-10-16	Optischer Kopf
DE3886930D1 (de)	1994-02-17	Optischer kopf.

Legal Events

Date	Code	Title
1996-03-14	8364	No opposition during term of opposition
2003-12-18	8320	Willingness to grant licences declared (paragraph 23)
2007-06-28	8339	Ceased/non-payment of the annual fee