DE3724622C2 - - Google Patents

Info

Publication number
DE3724622C2
DE3724622C2 DE19873724622 DE3724622A DE3724622C2 DE 3724622 C2 DE3724622 C2 DE 3724622C2 DE 19873724622 DE19873724622 DE 19873724622 DE 3724622 A DE3724622 A DE 3724622A DE 3724622 C2 DE3724622 C2 DE 3724622C2
Authority
DE
Germany
Prior art keywords
pits
tracking
grooves
guide grooves
signal
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
Application number
DE19873724622
Other languages
German (de)
English (en)
Other versions
DE3724622A1 (de
Inventor
Michiharu Yokohama Kanagawa Jp Abe
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.)
Ricoh Co Ltd
Original Assignee
Ricoh 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 JP61175295A external-priority patent/JP2633834B2/ja
Priority claimed from JP61175296A external-priority patent/JP2637077B2/ja
Priority claimed from JP61180707A external-priority patent/JP2633835B2/ja
Application filed by Ricoh Co Ltd filed Critical Ricoh Co Ltd
Publication of DE3724622A1 publication Critical patent/DE3724622A1/de
Application granted granted Critical
Publication of DE3724622C2 publication Critical patent/DE3724622C2/de
Granted 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
    • G11B7/24—Record carriers characterised by shape, structure or physical properties, or by the selection of the material
    • G11B7/2407—Tracks or pits; Shape, structure or physical properties thereof
    • G11B7/24085—Pits
    • 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

Landscapes

  • Optical Record Carriers And Manufacture Thereof (AREA)
DE19873724622 1986-07-25 1987-07-25 Optisches informationsspeichermedium Granted DE3724622A1 (de)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
JP61175295A JP2633834B2 (ja) 1986-07-25 1986-07-25 光学的情報記録媒体
JP61175296A JP2637077B2 (ja) 1986-07-25 1986-07-25 光学的情報記録媒体
JP61180707A JP2633835B2 (ja) 1986-07-31 1986-07-31 光学的情報記録媒体

Publications (2)

Publication Number Publication Date
DE3724622A1 DE3724622A1 (de) 1988-01-28
DE3724622C2 true DE3724622C2 (pt) 1990-06-07

Family

ID=27324082

Family Applications (1)

Application Number Title Priority Date Filing Date
DE19873724622 Granted DE3724622A1 (de) 1986-07-25 1987-07-25 Optisches informationsspeichermedium

Country Status (1)

Country Link
DE (1) DE3724622A1 (pt)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4025055A1 (de) * 1990-08-07 1992-02-13 Base Ten Systems Electronics G Positionsauslesevorrichtung, insbesondere fuer maschinen- und drehtisch-steuerungen
DE4430222A1 (de) * 1993-08-27 1995-03-02 Sharp Kk Magnetooptisches Speicherelement

Families Citing this family (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3804752C1 (en) * 1988-02-16 1989-07-13 Messerschmitt-Boelkow-Blohm Gmbh, 8012 Ottobrunn, De Digital optical read-only memory and method of tracking control in such an optical read-only memory
JPH0380443A (ja) * 1989-08-22 1991-04-05 Sony Corp 光デイスク
US5099469A (en) * 1990-02-20 1992-03-24 Del Mar Avionics Process for manufacturing an optical disc master
JP2923331B2 (ja) * 1990-06-12 1999-07-26 オリンパス光学工業株式会社 光記録媒体及びその再生装置
US5255262A (en) * 1991-06-04 1993-10-19 International Business Machines Corporation Multiple data surface optical data storage system with transmissive data surfaces
US5449590A (en) * 1991-06-04 1995-09-12 International Business Machines Corporation Multiple data surface optical data storage system
US5586107A (en) * 1991-06-04 1996-12-17 International Business Machines Corporation Multiple data surface optical data storage system
TW218427B (pt) * 1991-06-04 1994-01-01 Ibm
US5666344A (en) * 1991-06-04 1997-09-09 International Business Machines Corporation Multiple data surface optical data storage system
ES2108810T3 (es) * 1992-07-03 1998-01-01 Philips Electronics Nv Soporte de registro con zonas.
DE4311683C2 (de) * 1993-04-08 1996-05-02 Sonopress Prod Plattenförmiger optischer Speicher und Verfahren zu dessen Herstellung
US5644555A (en) * 1995-01-19 1997-07-01 International Business Machines Corporation Multiple data surface magneto-optical data storage system
US6078945A (en) * 1995-06-21 2000-06-20 Tao Group Limited Operating system for use with computer networks incorporating two or more data processors linked together for parallel processing and incorporating improved dynamic load-sharing techniques
WO1997036293A1 (en) * 1996-03-27 1997-10-02 Dai Nippon Printing Co., Ltd. Optical card

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2048431B2 (de) * 1970-08-05 1974-01-10 Ted Bildplatten Ag Aeg-Telefunkenteldec, Zug (Schweiz) Verfahren zum Aufzeichnen von Informationen, vorzugsweise von solchen großer Bandbreite im Bereich von mehreren MHz, auf einem Träger
DE2608715C2 (de) * 1976-03-03 1984-03-15 Philips Patentverwaltung Gmbh, 2000 Hamburg Optisches System zum Speichern und Wiedergewinnen digitaler Daten
CA1165871A (en) * 1978-11-08 1984-04-17 Kornelis Bulthuis Optically inscribable record carrier

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4025055A1 (de) * 1990-08-07 1992-02-13 Base Ten Systems Electronics G Positionsauslesevorrichtung, insbesondere fuer maschinen- und drehtisch-steuerungen
DE4025055B4 (de) * 1990-08-07 2004-06-03 Base Ten Systems Electronics Gmbh Positionsauslesevorrichtung, insbesondere für Maschinen- und Drehtisch-Steuerungen
DE4430222A1 (de) * 1993-08-27 1995-03-02 Sharp Kk Magnetooptisches Speicherelement
DE4430222B4 (de) * 1993-08-27 2006-11-23 Sharp K.K. Magnetooptisches Speicherelement

Also Published As

Publication number Publication date
DE3724622A1 (de) 1988-01-28

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Legal Events

Date Code Title Description
OP8 Request for examination as to paragraph 44 patent law
D2 Grant after examination
8364 No opposition during term of opposition