BR8102420A - Portador de gravacao e aparelho para ler o mesmo - Google Patents

Portador de gravacao e aparelho para ler o mesmo

Info

Publication number
BR8102420A
BR8102420A BR8102420A BR8102420A BR8102420A BR 8102420 A BR8102420 A BR 8102420A BR 8102420 A BR8102420 A BR 8102420A BR 8102420 A BR8102420 A BR 8102420A BR 8102420 A BR8102420 A BR 8102420A
Authority
BR
Brazil
Prior art keywords
appliance
read
same
recording carrier
recording
Prior art date
Application number
BR8102420A
Other languages
English (en)
Inventor
J Braat
Original Assignee
Philips Nv
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
Application filed by Philips Nv filed Critical Philips Nv
Publication of BR8102420A publication Critical patent/BR8102420A/pt

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
    • G11B7/08—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
    • G11B7/0938—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 servo format, e.g. guide tracks, pilot signals
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B3/00—Recording by mechanical cutting, deforming or pressing, e.g. of grooves or pits; Reproducing by mechanical sensing; Record carriers therefor
    • G11B3/60—Turntables for record carriers
    • 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
BR8102420A 1980-04-25 1981-04-22 Portador de gravacao e aparelho para ler o mesmo BR8102420A (pt)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL8002411 1980-04-25

Publications (1)

Publication Number Publication Date
BR8102420A true BR8102420A (pt) 1981-12-29

Family

ID=19835205

Family Applications (1)

Application Number Title Priority Date Filing Date
BR8102420A BR8102420A (pt) 1980-04-25 1981-04-22 Portador de gravacao e aparelho para ler o mesmo

Country Status (4)

Country Link
US (2) US4455632A (pt)
BR (1) BR8102420A (pt)
FR (1) FR2481501B1 (pt)
IT (1) IT8121324A0 (pt)

Families Citing this family (34)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL7803517A (nl) * 1978-04-03 1979-10-05 Philips Nv Registratiedrager met een optisch uitleesbare fase- struktuur en inrichting voor het uitlezen.
NL7810463A (nl) * 1978-10-19 1980-04-22 Philips Nv Registratiedrager waarin informatie is aangebracht in een optisch uitleesbare informatiestruktuur.
JPS5919250A (ja) * 1982-07-21 1984-01-31 Hitachi Ltd 情報の記録再生装置
EP0100995A3 (en) * 1982-08-10 1985-10-16 Kabushiki Kaisha Toshiba Optical disk
JPS5936338A (ja) * 1982-08-24 1984-02-28 Matsushita Electric Ind Co Ltd 光デイスク記録再生方法
JPS59198537A (ja) * 1983-04-22 1984-11-10 Matsushita Electric Ind Co Ltd 光学的記録再生装置
NL8301632A (nl) * 1983-05-09 1984-12-03 Philips Nv Registratiedrager waarin langs optische weg informatie kan worden ingeschreven en uitgelezen.
JPS6151631A (ja) * 1984-08-20 1986-03-14 Sharp Corp 光磁気メモリ素子
US5341362A (en) * 1984-08-20 1994-08-23 Sharp Kabushiki Kaisha Optical memory device having guide tracks shaped for increasing the quality of information signals
US4712204A (en) * 1984-08-31 1987-12-08 Matsushita Electric Industrial Co., Ltd. Optical disk and method for reproducing reference signal therefrom
NL8500152A (nl) * 1985-01-22 1986-08-18 Philips Nv Registratiedragerlichaam voorzien van vooraf aangebrachte en optisch detekteerbare servospoorgedeelten en sektoradressen.
FR2581784B1 (fr) * 1985-05-10 1994-03-25 Thomson Alcatel Gigadisc Support d'information a pregravure et son dispositif de lecture optique
NL8502802A (nl) * 1985-10-14 1987-05-04 Philips Nv Inrichting voor het uitlezen en/of inschrijven van een optische spoorvormige informatiestruktuur.
JP2590886B2 (ja) * 1987-06-11 1997-03-12 ソニー株式会社 デイスクプレーヤの信号処理回路
JPS648514A (en) * 1987-07-01 1989-01-12 Canon Kk Method and device for reproducing optical information and optical information recording medium
US5553051A (en) * 1987-09-04 1996-09-03 Hitachi, Ltd. Increased intensity optical recording medium with adjacent grooves of different optical depth and a method and apparatus for reproducing the same
US5187699A (en) * 1988-01-22 1993-02-16 U.S. Philips Corporation Method and apparatus for successively recording two EFM-modulated signals enabling detection of boundary condition for transitioning between signals
EP0372051A1 (en) * 1988-05-11 1990-06-13 EASTMAN KODAK COMPANY (a New Jersey corporation) Ternary optical elements and methods
US5235587A (en) * 1989-09-29 1993-08-10 The Regents Of The University Of California Optical data storage apparatus and method
US5050144A (en) * 1989-12-11 1991-09-17 International Business Machines Corporation Recording intensity modulated signals and polarization-modulated optical signals in the same area of a storage member
DE69127525T2 (de) * 1990-10-03 1998-01-08 Canon Kk Optisches Aufzeichnungsmedium und Verfahren zur dessen Herstellung
US5350618A (en) * 1991-03-01 1994-09-27 Teijin Seiki Co., Ltd. Magnetic medium comprising a substrate having pits and grooves of specific shapes and depths
JPH04360041A (ja) * 1991-06-06 1992-12-14 Pioneer Electron Corp 光学式ディスク及びピックアップ装置
JP3368908B2 (ja) * 1991-07-24 2003-01-20 松下電器産業株式会社 光磁気ディスク記録再生装置
JP3002318B2 (ja) * 1992-01-20 2000-01-24 パイオニア株式会社 光ディスク及び光ディスク再生装置
US5633854A (en) * 1992-02-19 1997-05-27 Sony Corporation Methods and apparatus for reproducing data recorded on an optical recording medium
EP0829855B1 (en) * 1992-02-19 2001-11-14 Sony Corporation Optical recording medium, recording and reproducing method and tracking error generating method
DE69321066T2 (de) * 1992-10-14 1999-03-18 Sony Corp., Tokio/Tokyo Magnetplattengerät
JP3179899B2 (ja) * 1992-11-24 2001-06-25 パイオニア株式会社 記録型光ディスク
US5471455A (en) * 1994-05-17 1995-11-28 Jabr; Salim N. High density optical storage system
US5757763A (en) * 1994-07-12 1998-05-26 Massachusetts Institute Of Technology Optical information storage via amplitude modulation
JPH0917032A (ja) * 1995-06-27 1997-01-17 Toshiba Corp 光情報記録媒体
CA2249403C (en) * 1996-03-22 2001-01-09 Calimetrics, Inc. Apparatus and methods for forming and use with variable pit depth optical recording media
EP1154414B1 (en) * 2000-05-10 2007-11-21 Sony Corporation Optical recording medium, master disc for the preparation of the optical recording medium and optical recording and/or reproducing apparatus

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2266932B1 (pt) * 1973-03-02 1977-09-02 Thomson Brandt
FR2280150B1 (fr) * 1974-07-26 1977-01-07 Thomson Brandt Dispositif de detection d'ecart de mise au point d'une tete de lecture optique par rapport a une surface de lecture
US4057833A (en) * 1974-10-03 1977-11-08 U.S. Philips Corporation Centering detection system for an apparatus for playing optically readable record carriers
NL7413162A (nl) * 1974-10-07 1976-04-09 Philips Nv Inrichting voor het uitlezen van een schijf- vormige registratiedrager.
US4065786A (en) * 1975-09-30 1977-12-27 Rca Corporation Videodisc playback system
US4161752A (en) * 1977-06-28 1979-07-17 International Business Machines Corporation High density video disk having two pit depths
NL7810462A (nl) * 1978-10-19 1980-04-22 Philips Nv Registratiedrager waarin informatie is aangebracht in een optisch uitleesbare stralingsreflekterende informatiestruktuur
CA1165871A (en) * 1978-11-08 1984-04-17 Kornelis Bulthuis Optically inscribable record carrier
NL7906576A (nl) * 1979-09-03 1981-03-05 Philips Nv Registratiedrager waarin informatie is aangebracht in een optisch uitleesbare informatiestruktuur, alsmede uitleesinrichting daarvoor.
NL7907180A (nl) * 1979-09-27 1981-03-31 Philips Nv Registratiedrager waarin informatie is aangebracht in een optisch uitleesbare informatiestruktuur, alsmede inrichting voor het uitlezen daarvan.

Also Published As

Publication number Publication date
FR2481501A1 (fr) 1981-10-30
US4455632A (en) 1984-06-19
US4556967A (en) 1985-12-03
IT8121324A0 (it) 1981-04-22
FR2481501B1 (fr) 1985-09-13

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