DE3581362D1 - Magnetooptischer wiedergabekopf mit hoher lichtausnutzung. - Google Patents
Magnetooptischer wiedergabekopf mit hoher lichtausnutzung.Info
- Publication number
- DE3581362D1 DE3581362D1 DE8585113337T DE3581362T DE3581362D1 DE 3581362 D1 DE3581362 D1 DE 3581362D1 DE 8585113337 T DE8585113337 T DE 8585113337T DE 3581362 T DE3581362 T DE 3581362T DE 3581362 D1 DE3581362 D1 DE 3581362D1
- Authority
- DE
- Germany
- Prior art keywords
- magneto
- light
- high use
- play head
- 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
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
- G11B11/10502—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 characterised by the transducing operation to be executed
- G11B11/10515—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
- G11B11/10576—Disposition or mounting of transducers relative to record carriers with provision for moving the transducers for maintaining alignment or spacing relative to the carrier
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP59221723A JPS61104348A (ja) | 1984-10-22 | 1984-10-22 | 光磁気ヘツド |
Publications (1)
Publication Number | Publication Date |
---|---|
DE3581362D1 true DE3581362D1 (de) | 1991-02-21 |
Family
ID=16771247
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE8585113337T Expired - Fee Related DE3581362D1 (de) | 1984-10-22 | 1985-10-21 | Magnetooptischer wiedergabekopf mit hoher lichtausnutzung. |
Country Status (4)
Country | Link |
---|---|
US (1) | US4729122A (de) |
EP (1) | EP0179429B1 (de) |
JP (1) | JPS61104348A (de) |
DE (1) | DE3581362D1 (de) |
Families Citing this family (15)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR900008378B1 (ko) * | 1986-03-19 | 1990-11-17 | 상요 덴기 가부시기가이샤 | 광학식 기록장치 |
EP0256685A3 (en) * | 1986-08-14 | 1988-11-30 | Optical Coating Laboratory, Inc. | Optical system and components for optical disk reader optical system and components for optical disk reader |
JPH07101523B2 (ja) * | 1986-09-12 | 1995-11-01 | キヤノン株式会社 | 光磁気信号再生装置 |
DE3704146A1 (de) * | 1987-02-11 | 1988-09-29 | Basf Ag | Laseroptisches schreib- und leseverfahren |
US4774615A (en) * | 1987-02-17 | 1988-09-27 | Eastman Kodak Company | Magneto-optic read-out method and apparatus with polarization correction means |
JPH073710B2 (ja) * | 1987-06-17 | 1995-01-18 | 日本電気株式会社 | 光磁気ディスク装置 |
US5202789A (en) * | 1987-10-16 | 1993-04-13 | Kabushiki Kaisha Toshiba | Optical system for preserving a state of polarization of light beam |
JP2902415B2 (ja) * | 1989-09-14 | 1999-06-07 | シャープ株式会社 | 光学ヘッド |
US5177346A (en) * | 1989-12-13 | 1993-01-05 | Computer Identics | Bar code reader system for reading bar code labels with a highly specular and low contrast surface |
FR2656723B1 (fr) * | 1989-12-28 | 1995-07-21 | Thomson Consumer Electronics | Tete de lecture multipiste magneto-optique. |
US5119352A (en) * | 1990-08-17 | 1992-06-02 | Hewlett-Packard Company | Magneto optic data storage read out apparatus and method |
US5218582A (en) * | 1990-12-03 | 1993-06-08 | Eastman Kodak Company | Magneto-optic readout using a polarization-preserving optical guide |
US5282188A (en) * | 1992-02-18 | 1994-01-25 | Eastman Kodak Company | Apparatus and method for optimizing performance in read/write head of an optical storage system with a magneto-optical storage medium |
JPH05282723A (ja) * | 1992-03-31 | 1993-10-29 | Matsushita Electric Ind Co Ltd | 光磁気ヘッド装置 |
JP2885232B2 (ja) * | 1997-06-27 | 1999-04-19 | 日本電気株式会社 | ディスク記録装置および方法 |
Family Cites Families (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3927946A (en) * | 1968-03-21 | 1975-12-23 | Sperry Rand Corp | Ring laser frequency biasing mechanism |
JPS52141608A (en) * | 1976-05-20 | 1977-11-26 | Sony Corp | Information detector |
PL112883B1 (en) * | 1978-05-13 | 1980-11-29 | Univ Warszawski | Generator of laser light harmonic component |
DE2953304C2 (de) * | 1978-11-01 | 1985-08-08 | Hitachi, Ltd., Tokio/Tokyo | Vorrichtung zum Lesen von magnetisch gespeicherter Information |
US4272159A (en) * | 1978-11-28 | 1981-06-09 | Nippon Telegraph & Telephone Corporation | Optical circulator |
JPS5766537A (en) * | 1980-10-09 | 1982-04-22 | Sharp Corp | Magnetooptic recording and reproducing device |
JPS57111843A (en) * | 1980-12-27 | 1982-07-12 | Canon Inc | Vertical magnetic reading optical system |
US4561032A (en) * | 1981-06-02 | 1985-12-24 | Canon Kabushiki Kaisha | Magnetooptic reproducing device |
US4558440A (en) * | 1982-08-19 | 1985-12-10 | Canon Kabushiki Kaisha | System for recording patterns of magnetically recorded information by utilizing the magneto-optic effect |
US4656433A (en) * | 1982-08-19 | 1987-04-07 | Hughes Aircraft Company | Laser amplifier buffer |
JPS59157856A (ja) * | 1983-02-25 | 1984-09-07 | Sanyo Electric Co Ltd | 光磁気情報記録装置に於ける再生構造 |
JPS59177748A (ja) * | 1983-03-28 | 1984-10-08 | Fujitsu Ltd | 光磁気記録再生装置 |
US4638470A (en) * | 1984-05-09 | 1987-01-20 | Xerox Corporation | Apparatus using beam splitter cube with specific characteristics for reading information recorded in a magneto-optic medium |
-
1984
- 1984-10-22 JP JP59221723A patent/JPS61104348A/ja active Pending
-
1985
- 1985-10-17 US US06/788,310 patent/US4729122A/en not_active Expired - Fee Related
- 1985-10-21 DE DE8585113337T patent/DE3581362D1/de not_active Expired - Fee Related
- 1985-10-21 EP EP85113337A patent/EP0179429B1/de not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
US4729122A (en) | 1988-03-01 |
EP0179429B1 (de) | 1991-01-16 |
JPS61104348A (ja) | 1986-05-22 |
EP0179429A2 (de) | 1986-04-30 |
EP0179429A3 (en) | 1988-07-20 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
DE3882210D1 (de) | Optischer wiedergabekopf. | |
KR860700068A (ko) | 광학디스크플레이어 | |
KR880700392A (ko) | 광학 디스크 플레이어 | |
DE3585310D1 (de) | Kopfzusammenbau mit schmaler kontur. | |
DE3585470D1 (de) | Elektrooptischer servowandlerkopf. | |
BR8506922A (pt) | Cabeca de poco | |
DE3582293D1 (de) | Optisches aufzeichnungsmittel. | |
DK209185D0 (da) | Single mode optisk fiberdaempningsled | |
DE3678992D1 (de) | Hohlfaser mit dreilappigem querschnitt. | |
DE3581362D1 (de) | Magnetooptischer wiedergabekopf mit hoher lichtausnutzung. | |
DE3785118T2 (de) | Optischer wiedergabekopf. | |
DE3679460D1 (de) | Optischer aufnahmekopf mit astigmatischer fokussierung. | |
DE3675732D1 (de) | Optisches aufzeichnungsmedium mit spurrille. | |
IT1182719B (it) | Laser stabilizzato con tripropilammina | |
KR880013257U (ko) | 광헤드 | |
NO862946D0 (no) | Optisk fiber med flerlagsbelegg. | |
NO860748L (no) | Fiberskjoet med optisk dempning. | |
DE3675845D1 (de) | Optisches aufzeichnungsverfahren. | |
DE3578741D1 (de) | Spinnkopf. | |
DE3650546D1 (de) | Optischer Datenträger | |
KR860005334A (ko) | 자기 헤드 | |
DK406186D0 (da) | Indeksstyret halvlederlaser | |
KR860004057U (ko) | 자기 헤드 | |
KR860007029U (ko) | 계측기가 부착된 분무기의 분사대 | |
KR850006814U (ko) | 조명등 겸용 수면유도등 |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
8364 | No opposition during term of opposition | ||
8339 | Ceased/non-payment of the annual fee |