DE69220015D1 - Optische Platten Lesegerät - Google Patents

Optische Platten Lesegerät

Info

Publication number
DE69220015D1
DE69220015D1 DE69220015T DE69220015T DE69220015D1 DE 69220015 D1 DE69220015 D1 DE 69220015D1 DE 69220015 T DE69220015 T DE 69220015T DE 69220015 T DE69220015 T DE 69220015T DE 69220015 D1 DE69220015 D1 DE 69220015D1
Authority
DE
Germany
Prior art keywords
optical disk
disk reader
reader
optical
disk
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
DE69220015T
Other languages
English (en)
Other versions
DE69220015T2 (de
Inventor
Seiji Nishiwaki
Junichi Asada
Shinji Uchida
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
Priority claimed from JP3346029A external-priority patent/JP2806113B2/ja
Priority claimed from JP13469992A external-priority patent/JPH05325194A/ja
Application filed by Matsushita Electric Industrial Co Ltd filed Critical Matsushita Electric Industrial Co Ltd
Publication of DE69220015D1 publication Critical patent/DE69220015D1/de
Application granted granted Critical
Publication of DE69220015T2 publication Critical patent/DE69220015T2/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
    • G11B7/1381—Non-lens elements for altering the properties of the beam, e.g. knife edges, slits, filters or stops
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B20/00—Signal processing not specific to the method of recording or reproducing; Circuits therefor
    • G11B20/10—Digital recording or reproducing
    • G11B20/10009—Improvement or modification of read or write signals
    • 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
    • G11B7/004—Recording, reproducing or erasing methods; Read, write or erase circuits therefor
    • G11B7/005—Reproducing
    • 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)
  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Optical Recording Or Reproduction (AREA)
DE69220015T 1991-12-27 1992-12-23 Optische Platten Lesegerät Expired - Fee Related DE69220015T2 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP3346029A JP2806113B2 (ja) 1991-12-27 1991-12-27 光ディスク装置
JP13469992A JPH05325194A (ja) 1992-05-27 1992-05-27 光ディスク装置

Publications (2)

Publication Number Publication Date
DE69220015D1 true DE69220015D1 (de) 1997-07-03
DE69220015T2 DE69220015T2 (de) 1997-09-25

Family

ID=26468731

Family Applications (1)

Application Number Title Priority Date Filing Date
DE69220015T Expired - Fee Related DE69220015T2 (de) 1991-12-27 1992-12-23 Optische Platten Lesegerät

Country Status (3)

Country Link
US (1) US5313450A (de)
EP (1) EP0548937B1 (de)
DE (1) DE69220015T2 (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103134444A (zh) * 2013-02-01 2013-06-05 同济大学 双视场可变焦三维测量系统

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2638520B2 (ja) * 1994-11-22 1997-08-06 日本電気株式会社 光情報記録媒体再生装置

Family Cites Families (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2831676A1 (de) * 1978-07-19 1980-02-07 Basf Ag Neue bis-epoxy-dialkoxy-alkane, deren herstellung und verwendung
JPS5864650A (ja) * 1981-10-14 1983-04-18 Mansei Kogyo Kk 光学的情報再生装置
DE3201318A1 (de) * 1982-01-18 1983-07-28 Tandberg Data A/S, Oslo Verfahren und schaltungsanordnung zum bewerten von lesesignalen eines magnetschichtspeichers
JPS5984319A (ja) * 1982-11-04 1984-05-16 Sony Corp デイジタル信号復元方式
JPS60107736A (ja) * 1983-11-16 1985-06-13 Ricoh Co Ltd 光ディスクメモリにおける信号読出方法
JPS61120380A (ja) * 1984-11-16 1986-06-07 Sony Corp デジタル信号処理回路
CA1275730C (en) * 1985-03-05 1990-10-30 Nec Corporation Reading circuit in an optical disk apparatus
JP2641421B2 (ja) * 1985-03-22 1997-08-13 株式会社日立製作所 光学的検出方法、光学的情報再生装置、及び信号検出回路
JPS61284876A (ja) * 1985-06-11 1986-12-15 Nec Corp 光デイスク装置
JPH0731877B2 (ja) * 1985-07-03 1995-04-10 株式会社日立製作所 情報記録再生方法及び装置
JP2810035B2 (ja) * 1986-08-22 1998-10-15 株式会社日立製作所 光学的記録再生方法
US4866757A (en) * 1986-10-22 1989-09-12 Nilssen Ole K Combined telephone and power distribution system
CA1322594C (en) * 1987-09-21 1993-09-28 Hiroshi Fuji Digital signal reproduction apparatus
US4839876A (en) * 1987-11-23 1989-06-13 International Business Machines Corporation Track seeking using a track following loop
JPS63247920A (ja) * 1988-01-14 1988-10-14 Olympus Optical Co Ltd 光学的情報読取り装置
JP2845915B2 (ja) * 1989-01-06 1999-01-13 株式会社日立製作所 情報再生方法および情報再生装置
JP2825876B2 (ja) * 1989-10-11 1998-11-18 日立マクセル株式会社 光記録媒体の情報記録再生装置

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103134444A (zh) * 2013-02-01 2013-06-05 同济大学 双视场可变焦三维测量系统

Also Published As

Publication number Publication date
EP0548937A1 (de) 1993-06-30
EP0548937B1 (de) 1997-05-28
DE69220015T2 (de) 1997-09-25
US5313450A (en) 1994-05-17

Similar Documents

Publication Publication Date Title
DE69125543D1 (de) Gerät für optische Platten
DE69227873T2 (de) Transparentes optisches Kennzeichen
DE69220540D1 (de) Optische Verbindungstechniken
DE69016054D1 (de) Optische Platte.
DE69310948D1 (de) Gerät für optische Platten
DE69212217D1 (de) Wiedergabegerät für doppelseitige optische Platten
DE69020688D1 (de) Optische Plattenaufzeichnungsvorrichtung.
DE69121786D1 (de) Lesegerät für optische Informationen
DE69319938T2 (de) Gerät für optische Platten
DE69112936D1 (de) Optische Platte.
DE69132425T2 (de) Optische Platte
DE69313810D1 (de) Optische platteneinheit
DE69226732T2 (de) Optisches Aufzeichnungsgerät
DE69124148D1 (de) Gerät für optische Platten
DE69112233D1 (de) Optische Platte.
DE69217836D1 (de) Optischer Plattenspieler
DE69213306D1 (de) Optisches Aufzeichnungsmedium
DE69024197D1 (de) Optische Informationslesevorrichtung
DE69222699D1 (de) Optische Kopfanordnung
DE69215472D1 (de) Optische Platte
DE69301739D1 (de) Gerät für optische Platten
DE69221216D1 (de) Optisches Plattengerät
DE59402249D1 (de) Optische lesevorrichtung
DE69114433D1 (de) Optische Platteneinheit.
DE69220015D1 (de) Optische Platten Lesegerät

Legal Events

Date Code Title Description
8364 No opposition during term of opposition
8339 Ceased/non-payment of the annual fee