DE68921087T2 - Gerät zur Aufnahme auf eine und Wiedergabe von einer optischen Scheibe. - Google Patents
Gerät zur Aufnahme auf eine und Wiedergabe von einer optischen Scheibe.Info
- Publication number
- DE68921087T2 DE68921087T2 DE68921087T DE68921087T DE68921087T2 DE 68921087 T2 DE68921087 T2 DE 68921087T2 DE 68921087 T DE68921087 T DE 68921087T DE 68921087 T DE68921087 T DE 68921087T DE 68921087 T2 DE68921087 T2 DE 68921087T2
- Authority
- DE
- Germany
- Prior art keywords
- recording
- optical disc
- playing back
- playing
- disc
- 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
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B11/00—Measuring arrangements characterised by the use of optical techniques
- G01B11/02—Measuring arrangements characterised by the use of optical techniques for measuring length, width or thickness
- G01B11/026—Measuring arrangements characterised by the use of optical techniques for measuring length, width or thickness by measuring distance between sensor and object
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B11/00—Recording on or reproducing from the same record carrier wherein for these two operations the methods are covered by different main groups of groups G11B3/00 - G11B7/00 or by different subgroups of group G11B9/00; Record carriers therefor
- G11B11/10—Recording on or reproducing from the same record carrier wherein for these two operations the methods are covered by different main groups of groups G11B3/00 - G11B7/00 or by different subgroups of group G11B9/00; Record carriers therefor using recording by magnetic means or other means for magnetisation or demagnetisation of a record carrier, e.g. light induced spin magnetisation; Demagnetisation by thermal or stress means in the presence or not of an orienting magnetic field
- G11B11/105—Recording on or reproducing from the same record carrier wherein for these two operations the methods are covered by different main groups of groups G11B3/00 - G11B7/00 or by different subgroups of group G11B9/00; Record carriers therefor using recording by magnetic means or other means for magnetisation or demagnetisation of a record carrier, e.g. light induced spin magnetisation; Demagnetisation by thermal or stress means in the presence or not of an orienting magnetic field using a beam of light or a magnetic field for recording by change of magnetisation and a beam of light for reproducing, i.e. magneto-optical, e.g. light-induced thermomagnetic recording, spin magnetisation recording, Kerr or Faraday effect reproducing
- G11B11/10532—Heads
- G11B11/10534—Heads for recording by magnetising, demagnetising or transfer of magnetisation, by radiation, e.g. for thermomagnetic recording
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B11/00—Recording on or reproducing from the same record carrier wherein for these two operations the methods are covered by different main groups of groups G11B3/00 - G11B7/00 or by different subgroups of group G11B9/00; Record carriers therefor
- G11B11/10—Recording on or reproducing from the same record carrier wherein for these two operations the methods are covered by different main groups of groups G11B3/00 - G11B7/00 or by different subgroups of group G11B9/00; Record carriers therefor using recording by magnetic means or other means for magnetisation or demagnetisation of a record carrier, e.g. light induced spin magnetisation; Demagnetisation by thermal or stress means in the presence or not of an orienting magnetic field
- G11B11/105—Recording on or reproducing from the same record carrier wherein for these two operations the methods are covered by different main groups of groups G11B3/00 - G11B7/00 or by different subgroups of group G11B9/00; Record carriers therefor using recording by magnetic means or other means for magnetisation or demagnetisation of a record carrier, e.g. light induced spin magnetisation; Demagnetisation by thermal or stress means in the presence or not of an orienting magnetic field using a beam of light or a magnetic field for recording by change of magnetisation and a beam of light for reproducing, i.e. magneto-optical, e.g. light-induced thermomagnetic recording, spin magnetisation recording, Kerr or Faraday effect reproducing
- G11B11/1055—Disposition or mounting of transducers relative to record carriers
- G11B11/10556—Disposition or mounting of transducers relative to record carriers with provision for moving or switching or masking the transducers in or out of their operative position
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B11/00—Recording on or reproducing from the same record carrier wherein for these two operations the methods are covered by different main groups of groups G11B3/00 - G11B7/00 or by different subgroups of group G11B9/00; Record carriers therefor
- G11B11/10—Recording on or reproducing from the same record carrier wherein for these two operations the methods are covered by different main groups of groups G11B3/00 - G11B7/00 or by different subgroups of group G11B9/00; Record carriers therefor using recording by magnetic means or other means for magnetisation or demagnetisation of a record carrier, e.g. light induced spin magnetisation; Demagnetisation by thermal or stress means in the presence or not of an orienting magnetic field
- G11B11/105—Recording on or reproducing from the same record carrier wherein for these two operations the methods are covered by different main groups of groups G11B3/00 - G11B7/00 or by different subgroups of group G11B9/00; Record carriers therefor using recording by magnetic means or other means for magnetisation or demagnetisation of a record carrier, e.g. light induced spin magnetisation; Demagnetisation by thermal or stress means in the presence or not of an orienting magnetic field using a beam of light or a magnetic field for recording by change of magnetisation and a beam of light for reproducing, i.e. magneto-optical, e.g. light-induced thermomagnetic recording, spin magnetisation recording, Kerr or Faraday effect reproducing
- G11B11/1055—Disposition or mounting of transducers relative to record carriers
- G11B11/10576—Disposition or mounting of transducers relative to record carriers with provision for moving the transducers for maintaining alignment or spacing relative to the carrier
-
- 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
- G11B7/0925—Electromechanical actuators for lens positioning
- G11B7/0937—Piezo-electric actuators
Applications Claiming Priority (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP8611688 | 1988-04-06 | ||
JP13138588 | 1988-05-31 | ||
JP13138888 | 1988-05-31 | ||
JP17802588 | 1988-07-19 | ||
JP2859789 | 1989-02-09 |
Publications (2)
Publication Number | Publication Date |
---|---|
DE68921087T2 true DE68921087T2 (de) | 1995-10-05 |
DE68921087T4 DE68921087T4 (de) | 1996-06-13 |
Family
ID=27521049
Family Applications (3)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE68921087A Expired - Fee Related DE68921087D1 (de) | 1988-04-06 | 1989-04-03 | Gerät zur Aufnahme auf eine und Wiedergabe von einer optischen Scheibe. |
DE68921087T Expired - Lifetime DE68921087T4 (de) | 1988-04-06 | 1989-04-03 | Gerät zur Aufnahme auf eine und Wiedergabe von einer optischen Scheibe. |
DE68926717T Expired - Fee Related DE68926717T2 (de) | 1988-04-06 | 1989-04-03 | Optischer Abstandsdetektor |
Family Applications Before (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE68921087A Expired - Fee Related DE68921087D1 (de) | 1988-04-06 | 1989-04-03 | Gerät zur Aufnahme auf eine und Wiedergabe von einer optischen Scheibe. |
Family Applications After (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE68926717T Expired - Fee Related DE68926717T2 (de) | 1988-04-06 | 1989-04-03 | Optischer Abstandsdetektor |
Country Status (3)
Country | Link |
---|---|
US (1) | US5247493A (de) |
EP (2) | EP0336687B1 (de) |
DE (3) | DE68921087D1 (de) |
Families Citing this family (37)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5305294A (en) * | 1988-04-04 | 1994-04-19 | Mitsubishi Denki Kabushiki Kaisha | Magneto-optical recording/reproducing system having an electromagnetic actuator |
NL9001546A (nl) * | 1990-07-06 | 1992-02-03 | Philips Nv | Inrichting voor het inschrijven en/of uitlezen van een magneto-optische informatiedrager. |
JP3016441B2 (ja) * | 1990-09-25 | 2000-03-06 | ソニー株式会社 | ヘツド位置制御装置 |
US5280340A (en) * | 1991-10-23 | 1994-01-18 | Phase Metrics | Method and apparatus to calibrate intensity and determine fringe order for interferometric measurement of small spacings |
US5311287A (en) * | 1992-02-25 | 1994-05-10 | International Business Machines Corporation | Direct access storage device with head-disc dynamics monitor |
JP3019232B2 (ja) * | 1992-03-06 | 2000-03-13 | キヤノン株式会社 | 光磁気ディスク装置 |
KR950003174B1 (ko) * | 1992-06-09 | 1995-04-01 | 주식회사금성사 | 광자기 기록장치 |
JPH0642914A (ja) * | 1992-07-24 | 1994-02-18 | Canon Inc | 変位測定装置 |
JP3153947B2 (ja) * | 1993-04-28 | 2001-04-09 | ソニー株式会社 | 磁気ヘッド及び光磁気記録装置 |
DE4415249A1 (de) * | 1994-04-30 | 1995-11-02 | Thomson Brandt Gmbh | Recorder mit magnetooptischer Aufzeichnung |
US5771139A (en) * | 1995-08-03 | 1998-06-23 | Phase Metrics | Integrated spring head/gimbal assembly holder |
US5638178A (en) * | 1995-09-01 | 1997-06-10 | Phase Metrics | Imaging polarimeter detector for measurement of small spacings |
US6178157B1 (en) * | 1996-04-15 | 2001-01-23 | Digital Papyrus Corporation | Flying head with adjustable actuator load |
US5619331A (en) * | 1996-07-26 | 1997-04-08 | Samsung Electronics, Ltd. | Monitoring the effect of read/write element on the effective optical constants of the Al2 O3 film by using a reflectometer |
US5991112A (en) * | 1997-03-04 | 1999-11-23 | Excel Precision | Non-contact servotrack writing with phase sensitive detection |
US6078468A (en) * | 1997-05-01 | 2000-06-20 | Fiske; Orlo James | Data storage and/or retrieval methods and apparatuses and components thereof |
US6091673A (en) * | 1997-11-25 | 2000-07-18 | Matsushita Electric Industrial Co., Ltd. | Magneto-optical head |
US6552878B2 (en) | 1998-08-05 | 2003-04-22 | Hitachi, Ltd. | Magnetic disk apparatus |
US6704161B1 (en) | 1998-11-06 | 2004-03-09 | Samsung Electronics Co. Ltd. | Shock protection skin bumper for a hard disk drive |
US6417986B1 (en) | 1998-11-16 | 2002-07-09 | Samsung Electronics Co., Ltd. | Impact guard for limiting hard disk movement |
US6549372B1 (en) | 1998-12-15 | 2003-04-15 | Samsung Electronics Co., Ltd | Device for limiting head movement within a hard disk drive |
US6417994B1 (en) | 1999-04-22 | 2002-07-09 | Samsung Electronics, Co., Ltd. | Swage plate with protruded walls to increase retention torque in hard disk applications |
US6501614B1 (en) | 1999-08-19 | 2002-12-31 | Samsung Electronics Co., Ltd. | Acoustic insulator for controlling noise generated in a mass storage device |
US6744597B2 (en) | 1999-10-29 | 2004-06-01 | Samsung Electronics Co., Ltd. | Dynamic absorber for an actuator arm in a disk drive |
CA2402020C (en) * | 2000-03-09 | 2006-08-29 | Gw Pharma Limited | Pharmaceutical compositions |
US6947252B2 (en) | 2000-05-10 | 2005-09-20 | Samsung Electronics Co., Ltd. | Wave stringer for controlling acoustic noise and shock vibration in a storage device |
US6446517B1 (en) | 2000-11-20 | 2002-09-10 | Samsung Electronics Company | Controlled particle deposition in drives and on media for thermal asperity studies |
US6785070B2 (en) * | 2000-12-05 | 2004-08-31 | Matsushita Electric Industrial Co., Ltd. | Magnetic transcription device |
JP4862108B2 (ja) * | 2001-02-02 | 2012-01-25 | 株式会社森精機製作所 | 受発光複合ユニット及びこれを用いた変位検出装置 |
US6590738B2 (en) | 2001-03-01 | 2003-07-08 | Samsung Electronics Co., Ltd. | Particle removal device in a hard disk drive |
US6762908B2 (en) | 2001-06-18 | 2004-07-13 | Samsung Electronics Co., Ltd. | Air razor and disk limiter for a hard disk drive |
US6982843B2 (en) * | 2001-08-17 | 2006-01-03 | Hitachi Global Storage Technologies Netherlands B.V. | Assembly comprising adjustable heat flux mechanism for thermally assisted/thermal information processing and control |
SG103367A1 (en) * | 2001-11-02 | 2004-04-29 | Matsushita Electric Ind Co Ltd | Piezoelectric driving device |
AU2003281387A1 (en) * | 2002-07-08 | 2004-01-23 | Koninklijke Philips Electronics N.V. | Lens driving device for optical read and/or write system and optical read/write system |
DE102006034733A1 (de) * | 2006-07-27 | 2008-01-31 | Deutsche Thomson Ohg | Schwingarm-Aktuator für eine optische Abtasteinrichtung |
WO2009024187A1 (fr) * | 2007-08-21 | 2009-02-26 | Thomas Edye | Dispositif de mesure sans contact de l'epaisseur de films ou de couches minces en defilement |
JP5282054B2 (ja) * | 2010-01-29 | 2013-09-04 | 株式会社日立ハイテクノロジーズ | 磁気ディスク検査方法及びその装置 |
Family Cites Families (19)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
IT939097B (it) * | 1970-11-06 | 1973-02-10 | Cie Des Compreurs | Perfezionamenti ai comparatori ottici a fibre ottiche |
NL7713711A (nl) * | 1977-12-12 | 1979-06-14 | Philips Nv | Optisch uitleeseenheid voor het uitlezen van een bewegende informatiedrager, in het bijzonder voor het uitlezen van een videoplaat. |
JPS5528586A (en) * | 1978-08-22 | 1980-02-29 | Mitsubishi Electric Corp | Semiconductor light source device |
US4358960A (en) * | 1979-05-04 | 1982-11-16 | Ladd Research Industries, Inc. | Differential fiber optic proximity sensor |
JPS5616936A (en) * | 1979-07-18 | 1981-02-18 | Matsushita Electric Ind Co Ltd | Driving unit for rotating magnetic head |
JPS6049841B2 (ja) * | 1980-07-16 | 1985-11-05 | 室蘭工業大学長 | 光学式非接触型検出装置 |
GB2083677B (en) * | 1980-07-16 | 1985-01-23 | Matsushita Electric Ind Co Ltd | Magnetooptical recording medium and a magnetooptical recording-and reeproducing device |
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. |
JPS618744A (ja) * | 1984-06-22 | 1986-01-16 | Fuji Photo Film Co Ltd | 光デイスク装置のフオ−カス誤差検出装置 |
US4742218A (en) * | 1985-03-11 | 1988-05-03 | Hitachi, Ltd. | Focus error detection apparatus utilizing focusing an front and rear sides of focal planes |
JPS6282525A (ja) * | 1985-10-08 | 1987-04-16 | Toshiba Corp | 光学ヘツド |
JP2533847B2 (ja) * | 1985-10-17 | 1996-09-11 | オリンパス光学工業株式会社 | 光磁気記録再生装置 |
JPH06103549B2 (ja) * | 1986-02-12 | 1994-12-14 | ソニー株式会社 | 光磁気記録装置 |
JP2609228B2 (ja) * | 1986-04-22 | 1997-05-14 | ソニー株式会社 | 光磁気記録装置 |
JPS62252535A (ja) * | 1986-04-24 | 1987-11-04 | Seiko Instr & Electronics Ltd | 光学的情報検出装置 |
JPH0656664B2 (ja) * | 1986-09-09 | 1994-07-27 | 日本電気ホームエレクトロニクス株式会社 | 光ヘツド |
JPH0693302B2 (ja) * | 1986-10-17 | 1994-11-16 | 株式会社日立製作所 | 光磁気記録再生装置 |
JPS63108576A (ja) * | 1986-10-27 | 1988-05-13 | Nec Corp | 浮動ヘツドのロ−デイング機構 |
US4858040A (en) * | 1987-08-25 | 1989-08-15 | Ampex Corporation | Bimorph actuator for a disk drive |
-
1989
- 1989-04-03 EP EP89303282A patent/EP0336687B1/de not_active Expired - Lifetime
- 1989-04-03 DE DE68921087A patent/DE68921087D1/de not_active Expired - Fee Related
- 1989-04-03 DE DE68921087T patent/DE68921087T4/de not_active Expired - Lifetime
- 1989-04-03 EP EP93201147A patent/EP0555943B1/de not_active Expired - Lifetime
- 1989-04-03 DE DE68926717T patent/DE68926717T2/de not_active Expired - Fee Related
- 1989-04-05 US US07/333,686 patent/US5247493A/en not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
EP0555943A3 (en) | 1993-12-08 |
DE68921087D1 (de) | 1995-03-23 |
DE68926717D1 (de) | 1996-07-25 |
EP0555943B1 (de) | 1996-06-19 |
US5247493A (en) | 1993-09-21 |
EP0336687B1 (de) | 1995-02-15 |
EP0555943A2 (de) | 1993-08-18 |
DE68921087T4 (de) | 1996-06-13 |
EP0336687A2 (de) | 1989-10-11 |
DE68926717T2 (de) | 1997-01-23 |
EP0336687A3 (de) | 1991-07-17 |
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