KR920701961A - 광디스크시스템 및 광디스크 - Google Patents
광디스크시스템 및 광디스크Info
- Publication number
- KR920701961A KR920701961A KR1019910701176A KR910701176A KR920701961A KR 920701961 A KR920701961 A KR 920701961A KR 1019910701176 A KR1019910701176 A KR 1019910701176A KR 910701176 A KR910701176 A KR 910701176A KR 920701961 A KR920701961 A KR 920701961A
- Authority
- KR
- South Korea
- Prior art keywords
- magneto
- optical
- laser beam
- recording layer
- cover
- Prior art date
Links
Classifications
-
- 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
- G11B11/10582—Record carriers characterised by the selection of the material or by the structure or form
- G11B11/10584—Record carriers characterised by the selection of the material or by the structure or form characterised by the form, e.g. comprising mechanical protection elements
-
- 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
-
- 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
-
- 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
- G11B11/10532—Heads
- G11B11/10541—Heads for reproducing
-
- 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
- G11B11/10541—Heads for reproducing
- G11B11/10543—Heads for reproducing using optical beam of radiation
-
- 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
- G11B11/10552—Arrangements of transducers relative to each other, e.g. coupled heads, optical and magnetic head on the same base
- G11B11/10554—Arrangements of transducers relative to each other, e.g. coupled heads, optical and magnetic head on the same base the transducers being disposed on the same side of the carrier
-
- 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
- G11B11/10558—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 in view of the loading or unloading of 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
- G11B7/002—Recording, reproducing or erasing systems characterised by the shape or form of the carrier
- G11B7/0037—Recording, reproducing or erasing systems characterised by the shape or form of the carrier with discs
-
- 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
- G11B7/1372—Lenses
-
- 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
- G11B7/1372—Lenses
- G11B7/1374—Objective lenses
-
- 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
- G11B7/24—Record carriers characterised by shape, structure or physical properties, or by the selection of the material
- G11B7/2403—Layers; Shape, structure or physical properties thereof
- G11B7/24056—Light transmission layers lying on the light entrance side and being thinner than the substrate, e.g. specially adapted for Blu-ray® discs
Landscapes
- Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Optical Head (AREA)
- Optical Record Carriers And Manufacture Thereof (AREA)
- Optical Recording Or Reproduction (AREA)
Abstract
내용 없음
Description
본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음
제1도는 종래의 광자기디스크시스템의 기본적인 구성을 나타낸 단면도이다. 제2도는 본원 발명에 의한 제1의 실시예의 광자기디스크시스템의 구성을 나타낸 단면도이다. 제3도는 본원 발명에 의한 제2의 실시예의 광자기디스크시스템의 구성을 나타낸 단면도이다.
Claims (15)
- 기록 또는 재생을 위해 레이저빔이 조사되는 기록층과, 상기 기록층을 덮도록 배설되어 상기 레이저빔이 투과하는 투광성커버를 구비한 광디스크에 정보신호를 기록하고 및/또는 광디스크로부터 정보신호를 재생하는 시스템으로서, 상기 레이저빔을 발생시키기 위한 레이저빔발생수단과, 상기 레이저빔을 상기 투광성커버층을 통하여 상기 기록층에 접속하는 대물렌즈를 구비한 광디스크시스템에 있어서, 상기 광디스크의 상기 투광성커버의 두께가 0.6내지 0.1㎜의 범위에 있고, 상기 대물렌즈의 개구수가 0.55내지 0.70의 범위에 있는 광디스크시스템.
- 기록 또는 재생을 위해 0.55 내지 0.70의 범위의 개구수를 가진 대물렌즈를 통하여 레이저빔이 집속되는 기록층과, 상기 기록층을 덮도록 배설되어 상기 레이저빔이 투과하는 투광성커버를 구비하고, 상기 투광성커버의 두께가 0.6 내지 0.1㎜의 범위에 있는 광디스크.
- 기체(氣體)와, 상기 기체위에 배설되어 기록 또는 재생을 위해 레이저빔이 조사되는 광자기기록층과, 상기 광자기기록층을 덮도록 배설되어 상기 레이저빔이 투과하는 투광성커버를 구비한 광자기디스크에 정보신호를 기록하고 및/또는 광자기디스크로부터 정보 신호를 재생하는 시스템으로서, 상기 레이저빔을 발생시키기 위한 레이저빔발생수단과, 상기 레이저빔을 상기 투광성커버를 통하여 상기 광자기기록층에 집속하는 대물렌즈와, 상기 광자기기록층에 자계를 가하기 위한 자계공급수단을 구비하고, 상기 광자기디스크의 상기 투광성커버의 두께가 0.6내지 0.1㎜의 범위에 있고, 상기 대물렌즈의 개구수가 0.55 내지 0.70의 범위에 있는 광자기디스크시스템.
- 제3항에 있어서, 상기 자계공급수단은 상기 광자기디스크를 사이에 두고 상기 대물렌즈와 서로 대향하는 위치에 배설되어 있는 광자기디스크 시스템.
- 제3항에 있어서, 상기 자계공급수단은 상기 대물렌즈에 근접하여 배설되어 있는 광자기디스크시스템.
- 제5항에 있어서, 상기 자계공급수단은 상기 대물렌즈와 상기 광자기디스크와의 사이에 위치하도록 배설되어 상기 광자기디스크와 서로 대향하는 광자기디스크시스템.
- 기록 또는 재생을 위해 레이저빔이 조사되는 광자기기록층과, 상기 광자기기록층을 덮도록 배설되어 상기 레이저빔이 투과하는 투광성커버를 구비하여 상기 광자기기록층과 상기 투광성커버가 기체의 양면에 각각 배설되어 이루어지는 광자기디스크에 정보신호를 기록하고 및/또는 광자기디스크로부터 정보신호를 재생하는 시스템에 있어서, 상기 레이저빔을 발생시키기 위한 레이저빔 발생수단과, 상기 레이저빔을 상기 투광성커버를 통하여 상기 광자기기록층에 접속하는 대물렌즈와, 상기 광자기기록층에 자계를 가하기 위해 상기 대물렌즈에 근접하여 배설되어 있는 자계공급수단을 포함하는 광자기픽업장치를 한쌍 구비하고, 상기 한쌍의 광자기픽업장치는 상기 광자기디스크를 사이에 두고 서로 대향하는 위치에 배설되는 동시에, 상기 광자기디스크의 상기 각 투광성커버의 두께가 0.6내지 0.1㎜의 범위에 있고, 상기 각 대물렌즈의 개구수가 0.55내지 0.70의 범위에 있는 광자기 디스크시스템.
- 제7항에 있어서, 상기 각 자계공급수단은 상기 대물렌즈와 상기 광자기디스크와의 사이에 위치하도록 배설되어 상기 광자기디스크와 서로 대향하는 광자기디스크시스템.
- 제5항 또는 제7항에 있어서, 상기 자계공급수단은 투광성유리판에 코일패턴을 형성하여 이루어지는 광자기시스템.
- 제3항 또는 제7항에 있어서, 상기 광자기디스크는 상기 기체화 상기 광자기기록층과의 사이에 고투자율층을 구비하는 강자기디스크시스템.
- 기체와, 이 기체위에 배설되어 기록 및/또는 재생을 위해 0.55내지 0.70의 범위의 개구수를 가진 대물렌즈를 통하여 레이저빔이 집속되는 광자기기록층과, 이 광자기기록층을 덮도록 배설되어 상기 레이저빔이 투과하는 투광성커버를 구비하고, 상기 투광성커버의 두께가 0.6내지 0.1㎜의 범위에 있는 광자기디스크.
- 제11항에 있어서, 기체의 양면에 상기 광자기기록층과 상기 투광성커버가 각각 배설되어 이루어지는 광자기디스크.
- 제11항 또는 제12항에 있어서, 상기 기체와 상기 광자기기록층과의 사이에 고투자율층을 구비하는 광자기디스크.
- 제11항 또는 제12항에 있어서, 상기 투광성커버는 투광성접착제층 및 투광성판으로 이루어지는 광자기디스크.
- 제14항에 있어서, 상기 투광성접착제층은 광경화수지로 이루어지는 광자기디스크.※ 참고사항 : 최초출원 내용에 의하여 공개되는 것임.
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP90-21210 | 1990-01-31 | ||
JP2021210A JPH03225650A (ja) | 1990-01-31 | 1990-01-31 | 光ディスクシステム |
PCT/JP1991/000113 WO1991011807A1 (en) | 1990-01-31 | 1991-01-30 | Optical disc system and optical disc |
Related Child Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
KR1019997003172A Division KR100233420B1 (ko) | 1990-01-31 | 1999-04-12 | 광디스크 시스템 및 광디스크 |
Publications (2)
Publication Number | Publication Date |
---|---|
KR920701961A true KR920701961A (ko) | 1992-08-12 |
KR100221826B1 KR100221826B1 (ko) | 1999-10-01 |
Family
ID=12048632
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
KR1019910701176A KR100221826B1 (ko) | 1990-01-31 | 1991-01-30 | 광디스크 시스템 및 광디스크 |
Country Status (7)
Country | Link |
---|---|
EP (4) | EP0715303B1 (ko) |
JP (1) | JPH03225650A (ko) |
KR (1) | KR100221826B1 (ko) |
AU (1) | AU631725B2 (ko) |
DE (3) | DE69121656T2 (ko) |
HK (1) | HK1049910A1 (ko) |
WO (1) | WO1991011807A1 (ko) |
Families Citing this family (21)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5148421A (en) * | 1990-04-20 | 1992-09-15 | Matsushita Electric Industrial Co., Ltd. | Optical head |
JP2616596B2 (ja) * | 1990-04-20 | 1997-06-04 | 松下電器産業株式会社 | 光ディスク |
USRE37185E1 (en) | 1990-04-20 | 2001-05-22 | Matsushita Electric Industrial Co., Ltd. | Optical head |
US5202880A (en) * | 1992-03-06 | 1993-04-13 | Digital Equipment Corporation | Double-sided magneto-optical media for a multi-disk storage device |
US5470627A (en) * | 1992-03-06 | 1995-11-28 | Quantum Corporation | Double-sided optical media for a disk storage device |
US5481530A (en) * | 1992-10-20 | 1996-01-02 | Mitsubishi Chemical Corporation | High density optical recording method and recording medium |
JPH0877561A (ja) * | 1994-09-07 | 1996-03-22 | Mitsubishi Chem Corp | 光学的情報記録再生方法 |
JPH08203126A (ja) * | 1995-01-27 | 1996-08-09 | Nec Corp | 光学的情報記録媒体ならびに光学的情報再生方法および 光学的情報記録再生消去方法 |
JP3241560B2 (ja) * | 1995-02-24 | 2001-12-25 | ソニー株式会社 | 光学記録媒体及びその製造方法 |
US6049518A (en) * | 1995-08-31 | 2000-04-11 | Sanyo Electric Co., Ltd. | Optical disc recording/reproducing apparatus recording/reproducing information to/from optical discs according to different standards |
JPH10188320A (ja) * | 1996-12-20 | 1998-07-21 | Sony Corp | 光ディスク記録再生装置および方法 |
JPH10326435A (ja) * | 1997-03-25 | 1998-12-08 | Sony Corp | 光学記録媒体及び光学ディスク装置 |
JPH10302310A (ja) | 1997-04-25 | 1998-11-13 | Sony Corp | 光学記録媒体及び光学ディスク装置 |
US5978320A (en) * | 1997-05-16 | 1999-11-02 | Sony Corporation | Recording/reproducing apparatus for use with a photomagnetic recording medium |
JP3294782B2 (ja) * | 1997-05-19 | 2002-06-24 | ソニー株式会社 | 光ディスクのアクセス方法 |
US6564009B2 (en) | 1997-05-19 | 2003-05-13 | Sony Corporation | Apparatus for recording and/or reproducing data onto and/or from an optical disk and method thereof |
JP3210608B2 (ja) * | 1997-05-19 | 2001-09-17 | ソニー株式会社 | 光ディスク及び光ディスク装置 |
JP3773681B2 (ja) | 1999-01-08 | 2006-05-10 | 富士通株式会社 | 光学ヘッド、光学部品、および光記憶装置 |
JP2012208989A (ja) * | 2011-03-30 | 2012-10-25 | Tdk Corp | 光記録再生方法、光記録再生装置 |
JP5659911B2 (ja) * | 2011-03-30 | 2015-01-28 | Tdk株式会社 | 光記録再生方法、光記録再生装置 |
US8630156B2 (en) | 2011-02-04 | 2014-01-14 | Tdk Corporation | Optical recording and reading method, optical recording and reading apparatus, optical recording medium, and method for producing an optical recording medium |
Family Cites Families (19)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
NL7713710A (nl) * | 1977-12-12 | 1979-06-14 | Philips Nv | Schijfvormige informatiedrager met afdeklagen. |
NL7809635A (nl) * | 1978-09-22 | 1980-03-25 | Philips Nv | Inrichting voor het uitlezen van een optische registra- tiedrager bevattende een stralingsreflekterende infor- matiestruktuur. |
JPS5923014B2 (ja) * | 1979-03-07 | 1984-05-30 | 日本放送協会 | 光磁気記録再生方法 |
JPS5613534A (en) * | 1979-07-16 | 1981-02-09 | Toshiba Corp | Optical recording body and its manufacture |
JPS5727451A (en) * | 1980-07-23 | 1982-02-13 | Sharp Corp | Magnetooptic storage element |
JPS57150158A (en) * | 1981-03-13 | 1982-09-16 | Ricoh Co Ltd | Magnetooptic recording medium |
JPS57164418A (en) * | 1981-04-02 | 1982-10-09 | Ricoh Co Ltd | Vertical heat magnetic recording medium |
EP0128949A4 (en) * | 1982-12-17 | 1985-06-10 | Burroughs Corp | COATED MEDIA FOR OPTICAL RECORDING AND RELATED COATING TECHNIQUES. |
JPS6057553A (ja) * | 1983-06-01 | 1985-04-03 | バロ−ス・コ−ポレ−シヨン | 光学メモリデイスクとその製造方法 |
JPS61242301A (ja) * | 1985-04-18 | 1986-10-28 | Fujitsu Ltd | 光磁気走査方式 |
JPS626447A (ja) * | 1985-07-02 | 1987-01-13 | Ricoh Co Ltd | 光情報記録媒体 |
JPH0746441B2 (ja) * | 1986-04-17 | 1995-05-17 | 松下電器産業株式会社 | 光学記録部材 |
US4807204A (en) * | 1986-07-07 | 1989-02-21 | Brother Kogyo Kabushiki Kaisha | Magneto-optical recording medium having pairs of mutually corresponding recording segments, and apparatus for recording information on the medium |
JPS6313421U (ko) * | 1986-07-12 | 1988-01-28 | ||
JPS6314347A (ja) * | 1986-07-07 | 1988-01-21 | Brother Ind Ltd | 光磁気記録装置 |
JP2578459B2 (ja) * | 1988-01-25 | 1997-02-05 | キヤノン株式会社 | 情報記録媒体、情報記録媒体用基板の製造方法及び情報記録媒体用基板の成形用型 |
US5105408A (en) * | 1988-05-12 | 1992-04-14 | Digital Equipment Corporation | Optical head with flying lens |
JP2855659B2 (ja) * | 1989-06-05 | 1999-02-10 | ソニー株式会社 | 光磁気記録媒体 |
CA2027870C (en) * | 1989-10-21 | 2000-09-12 | Tetsu Watanabe | Magnetooptical recording medium and method for manufacturing the same |
-
1990
- 1990-01-31 JP JP2021210A patent/JPH03225650A/ja active Pending
-
1991
- 1991-01-30 EP EP96100707A patent/EP0715303B1/en not_active Expired - Lifetime
- 1991-01-30 DE DE69121656T patent/DE69121656T2/de not_active Expired - Lifetime
- 1991-01-30 EP EP99104762A patent/EP0923074B1/en not_active Expired - Lifetime
- 1991-01-30 DE DE69133103T patent/DE69133103T2/de not_active Expired - Lifetime
- 1991-01-30 DE DE69133137T patent/DE69133137T2/de not_active Expired - Lifetime
- 1991-01-30 WO PCT/JP1991/000113 patent/WO1991011807A1/ja active Application Filing
- 1991-01-30 KR KR1019910701176A patent/KR100221826B1/ko not_active IP Right Cessation
- 1991-01-30 EP EP91903625A patent/EP0473785B1/en not_active Expired - Lifetime
- 1991-01-30 AU AU71860/91A patent/AU631725B2/en not_active Expired
- 1991-01-30 EP EP02005142A patent/EP1225575A3/en not_active Ceased
-
2003
- 2003-01-16 HK HK03100422.5A patent/HK1049910A1/zh unknown
Also Published As
Publication number | Publication date |
---|---|
HK1049910A1 (zh) | 2003-05-30 |
DE69121656T2 (de) | 1997-04-03 |
KR100221826B1 (ko) | 1999-10-01 |
EP1225575A2 (en) | 2002-07-24 |
EP0923074A1 (en) | 1999-06-16 |
DE69133137D1 (de) | 2002-11-21 |
EP1225575A3 (en) | 2005-10-05 |
JPH03225650A (ja) | 1991-10-04 |
DE69133137T2 (de) | 2003-06-05 |
EP0715303B1 (en) | 2002-10-16 |
WO1991011807A1 (en) | 1991-08-08 |
EP0715303A2 (en) | 1996-06-05 |
DE69133103T2 (de) | 2003-06-05 |
AU7186091A (en) | 1991-08-21 |
EP0473785A4 (en) | 1992-06-24 |
EP0473785A1 (en) | 1992-03-11 |
EP0923074B1 (en) | 2002-09-04 |
EP0473785B1 (en) | 1996-08-28 |
DE69133103D1 (de) | 2002-10-10 |
AU631725B2 (en) | 1992-12-03 |
DE69121656D1 (de) | 1996-10-02 |
EP0715303A3 (en) | 1998-03-18 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
KR920701961A (ko) | 광디스크시스템 및 광디스크 | |
JPS62146444A (ja) | 読取・書込ヘツド | |
KR970707535A (ko) | 광학적 다층 구조의 정보 캐리어(Optical multilayer information carrier) | |
KR960032344A (ko) | 광학픽업장치 | |
MY122178A (en) | Optical recording medium and optical recording/reproducing apparatus | |
JP2574747B2 (ja) | 光磁気記録装置 | |
KR960038775A (ko) | 다층 기록막을 갖는 광디스크용 광픽업 장치 | |
KR920701962A (ko) | 광자기 기록 재생 장치 | |
MY128091A (en) | Objective lens device and optical pickup adopting the same | |
ATE187839T1 (de) | Aufzeichnungs-/wiedergabesystem für eine magneto- optische platte | |
JP2000011440A (ja) | 光学式ピックアップ装置用アクチュエータ | |
KR910003616A (ko) | 광자기 픽업 장치 | |
JPS55150142A (en) | Optical signal reproducing head | |
JPS58150149A (ja) | 磁気光学記録媒体 | |
JPH01307934A (ja) | 光学ヘッド | |
JPS5548836A (en) | Signal recording board and recording and reproducing method | |
JP3104202B2 (ja) | 光学記録媒体 | |
JP3349714B2 (ja) | 光磁気ディスク装置 | |
JPS5730132A (en) | Magnetooptical storage device | |
JPS6132244A (ja) | 光磁気記録装置 | |
JP3022375B2 (ja) | 光磁気記録媒体記録再生装置 | |
JP2570557B2 (ja) | 光磁気記録方法 | |
JPH04330656A (ja) | 光磁気記録再生装置 | |
JPH03178062A (ja) | 光ディスク | |
JPS63117334A (ja) | 光学式情報再生装置 |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
A201 | Request for examination | ||
E902 | Notification of reason for refusal | ||
A107 | Divisional application of patent | ||
E701 | Decision to grant or registration of patent right | ||
GRNT | Written decision to grant | ||
FPAY | Annual fee payment |
Payment date: 20100623 Year of fee payment: 12 |
|
EXPY | Expiration of term |