JPS55139693A - Write system for optical recording medium - Google Patents

Write system for optical recording medium

Info

Publication number
JPS55139693A
JPS55139693A JP4710179A JP4710179A JPS55139693A JP S55139693 A JPS55139693 A JP S55139693A JP 4710179 A JP4710179 A JP 4710179A JP 4710179 A JP4710179 A JP 4710179A JP S55139693 A JPS55139693 A JP S55139693A
Authority
JP
Japan
Prior art keywords
pulse
width
write
recording medium
optical recording
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.)
Granted
Application number
JP4710179A
Other languages
Japanese (ja)
Other versions
JPS6238768B2 (en
Inventor
Koichi Ogawa
Shigeru Arai
Seiya Ogawa
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.)
Fujitsu Ltd
Original Assignee
Fujitsu 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
Application filed by Fujitsu Ltd filed Critical Fujitsu Ltd
Priority to JP4710179A priority Critical patent/JPS55139693A/en
Publication of JPS55139693A publication Critical patent/JPS55139693A/en
Publication of JPS6238768B2 publication Critical patent/JPS6238768B2/ja
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
    • G11B7/12—Heads, e.g. forming of the optical beam spot or modulation of the optical beam
    • G11B7/125—Optical beam sources therefor, e.g. laser control circuitry specially adapted for optical storage devices; Modulators, e.g. means for controlling the size or intensity of optical spots or optical traces
    • G11B7/126—Circuits, methods or arrangements for laser control or stabilisation
    • 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
    • G11B7/0045—Recording

Landscapes

  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Optical Recording Or Reproduction (AREA)

Abstract

PURPOSE:To make it possible to perform bitbybit write processing of high precision completely corresponding to input pulse width by exercising control over the modulation of a laser beam by generating a pulse of width corresponding to a write signal pulse with only its leading part voltage higher. CONSTITUTION:Monostable multivibrator 12 is triggered by write pulse S1 to generate high-level pulse S2 of fixed width, which is mixed via line driver 14 and resistance R2 with pulse S1 having passed through delay circuit 11, line driver 13 and resistance R1 to generate a pulse provided with pulse S2 at its leading part when the pulse width of pulse S1 is wide or pulse S3 equivalent to pulse S2 when narrow, synchronizing with the rise of pulse S1. Laser beam nodulator 17 is controlled by pulses S3 to write data on an optical recording medium, and consequently even when the pulse width is wide, an influence of heat in writing is eliminated, so that bits corresponding to pulses S1 will be generated with high precision.
JP4710179A 1979-04-17 1979-04-17 Write system for optical recording medium Granted JPS55139693A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP4710179A JPS55139693A (en) 1979-04-17 1979-04-17 Write system for optical recording medium

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP4710179A JPS55139693A (en) 1979-04-17 1979-04-17 Write system for optical recording medium

Publications (2)

Publication Number Publication Date
JPS55139693A true JPS55139693A (en) 1980-10-31
JPS6238768B2 JPS6238768B2 (en) 1987-08-19

Family

ID=12765779

Family Applications (1)

Application Number Title Priority Date Filing Date
JP4710179A Granted JPS55139693A (en) 1979-04-17 1979-04-17 Write system for optical recording medium

Country Status (1)

Country Link
JP (1) JPS55139693A (en)

Cited By (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5736439A (en) * 1980-08-13 1982-02-27 Matsushita Electric Ind Co Ltd Information signal recorder
JPS58182144A (en) * 1982-04-16 1983-10-25 Hitachi Ltd Driving method of semiconductor laser
JPS58208938A (en) * 1982-05-31 1983-12-05 Sony Corp Disk recording device
JPS59116946A (en) * 1982-11-12 1984-07-06 エヌ・ベ−・フイリツプス・フル−イランペンフアブリケン Data recorder
JPS60162768A (en) * 1984-01-31 1985-08-24 Nippon Kogaku Kk <Nikon> Thin metallic film having surface protected with carbide
JPS61131258A (en) * 1984-11-29 1986-06-18 Seiko Epson Corp Photomagnetic recording device
JPS61137225A (en) * 1984-12-07 1986-06-24 Matsushita Electric Ind Co Ltd Signal recorder
JPS61216126A (en) * 1985-03-22 1986-09-25 Hitachi Ltd Optical recording system
EP0206824A2 (en) * 1985-06-26 1986-12-30 International Business Machines Corporation Apparatus for thermally recording data
JPS6339138A (en) * 1986-08-01 1988-02-19 Matsushita Electric Ind Co Ltd Laser power controller
JPS63153726A (en) * 1986-10-29 1988-06-27 コーニンクレッカ　フィリップス　エレクトロニクス　エヌ　ヴィ Method and apparatus for recording binary information signal
JPS63160017A (en) * 1986-12-23 1988-07-02 Yamaha Corp Optical disk recorder
JPS63175230A (en) * 1987-01-16 1988-07-19 Nikon Corp Optical medium recorder
JPH027231A (en) * 1988-06-27 1990-01-11 Hitachi Ltd Information recording method
EP0509836A2 (en) * 1991-04-17 1992-10-21 Sharp Kabushiki Kaisha Magneto-optical recording medium
EP0525776A2 (en) * 1991-08-02 1993-02-03 Sharp Kabushiki Kaisha Magneto-optical recording apparatus using the magnetic field modulation method
US5400313A (en) * 1992-11-09 1995-03-21 International Business Machines Corporation Optical data storage system and method with reduced heat buildup
JPH0864890A (en) * 1995-08-04 1996-03-08 Hitachi Ltd Drive method for semiconductor laser
US5530688A (en) * 1994-10-31 1996-06-25 International Business Machines Corporation Optical disk recording device using two modulated laser beams for recording information data

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
PL2205418T5 (en) 2008-04-14 2021-05-31 Keter Plastic Ltd. An artificial panel, a method for manufacturing same and furniture articles therefrom

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5145908A (en) * 1974-10-17 1976-04-19 Victor Company Of Japan Johoshingono kogakutekikirokuhoshiki
JPS5323696A (en) * 1976-08-17 1978-03-04 Nat Rijiekutaazu Inc Gmbh Circuit for use in watching coin examining devices

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5145908A (en) * 1974-10-17 1976-04-19 Victor Company Of Japan Johoshingono kogakutekikirokuhoshiki
JPS5323696A (en) * 1976-08-17 1978-03-04 Nat Rijiekutaazu Inc Gmbh Circuit for use in watching coin examining devices

Cited By (26)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6211411B2 (en) * 1980-08-13 1987-03-12 Matsushita Electric Ind Co Ltd
JPS5736439A (en) * 1980-08-13 1982-02-27 Matsushita Electric Ind Co Ltd Information signal recorder
JPS58182144A (en) * 1982-04-16 1983-10-25 Hitachi Ltd Driving method of semiconductor laser
JPS58208938A (en) * 1982-05-31 1983-12-05 Sony Corp Disk recording device
JPH0565939B2 (en) * 1982-05-31 1993-09-20 Sony Corp
JPS59116946A (en) * 1982-11-12 1984-07-06 エヌ・ベ−・フイリツプス・フル−イランペンフアブリケン Data recorder
JPH0473224B2 (en) * 1982-11-12 1992-11-20 Fuiritsupusu Furuuiranpenfuaburiken Nv
JPS60162768A (en) * 1984-01-31 1985-08-24 Nippon Kogaku Kk <Nikon> Thin metallic film having surface protected with carbide
JPH0527175B2 (en) * 1984-01-31 1993-04-20 Nippon Kogaku Kk
JPS61131258A (en) * 1984-11-29 1986-06-18 Seiko Epson Corp Photomagnetic recording device
JPS61137225A (en) * 1984-12-07 1986-06-24 Matsushita Electric Ind Co Ltd Signal recorder
JPH0650567B2 (en) * 1984-12-07 1994-06-29 松下電器産業株式会社 Signal recorder
JPS61216126A (en) * 1985-03-22 1986-09-25 Hitachi Ltd Optical recording system
EP0206824A2 (en) * 1985-06-26 1986-12-30 International Business Machines Corporation Apparatus for thermally recording data
JPS626443A (en) * 1985-06-26 1987-01-13 インタ−ナショナル　ビジネス　マシ−ンズ　コ−ポレ−ション Thermal induction recording
JPS6339138A (en) * 1986-08-01 1988-02-19 Matsushita Electric Ind Co Ltd Laser power controller
JPS63153726A (en) * 1986-10-29 1988-06-27 コーニンクレッカ　フィリップス　エレクトロニクス　エヌ　ヴィ Method and apparatus for recording binary information signal
JPS63160017A (en) * 1986-12-23 1988-07-02 Yamaha Corp Optical disk recorder
JPS63175230A (en) * 1987-01-16 1988-07-19 Nikon Corp Optical medium recorder
JPH027231A (en) * 1988-06-27 1990-01-11 Hitachi Ltd Information recording method
EP0509836A2 (en) * 1991-04-17 1992-10-21 Sharp Kabushiki Kaisha Magneto-optical recording medium
US5707727A (en) * 1991-04-17 1998-01-13 Sharp Kabushiki Kaisha Magneto-optical recording medium
EP0525776A2 (en) * 1991-08-02 1993-02-03 Sharp Kabushiki Kaisha Magneto-optical recording apparatus using the magnetic field modulation method
US5400313A (en) * 1992-11-09 1995-03-21 International Business Machines Corporation Optical data storage system and method with reduced heat buildup
US5530688A (en) * 1994-10-31 1996-06-25 International Business Machines Corporation Optical disk recording device using two modulated laser beams for recording information data
JPH0864890A (en) * 1995-08-04 1996-03-08 Hitachi Ltd Drive method for semiconductor laser

Also Published As

Publication number Publication date
JPS6238768B2 (en) 1987-08-19

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