JPS5774835A - Optical recording system - Google Patents

Optical recording system

Info

Publication number
JPS5774835A
JPS5774835A JP14896180A JP14896180A JPS5774835A JP S5774835 A JPS5774835 A JP S5774835A JP 14896180 A JP14896180 A JP 14896180A JP 14896180 A JP14896180 A JP 14896180A JP S5774835 A JPS5774835 A JP S5774835A
Authority
JP
Japan
Prior art keywords
metallic layer
recording
control
servo
instance
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.)
Pending
Application number
JP14896180A
Other languages
Japanese (ja)
Inventor
Yasuyuki Goto
Nagaaki Etsuno
Shigeru Arai
Hironori Goto
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 JP14896180A priority Critical patent/JPS5774835A/en
Publication of JPS5774835A publication Critical patent/JPS5774835A/en
Pending 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
    • G11B7/08—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
    • G11B7/0901—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 for track following only

Landscapes

  • Optical Recording Or Reproduction (AREA)

Abstract

PURPOSE:To exactly execute a track servo-control of a recording substrate, and also to erase the recording, by forming a thermoplastic substance layer and a metallic layer as a substrate, providing a groove part for separating the metallic layer, and constituting so that information is recorded on the surface of the metallic layer. CONSTITUTION:A photoresist 4 is applied on an optical disk 1 which has vapor-deposited, for instance, Al3 to thickness of 300Angstrom on a thermoplastic resin part 2 such as acrylic resin and polyvinyl chloride, and is exposed through a mask, and after that, numbers of concentric groove parts 7 are formed by means of development and etching. To the part of the metallic layer 3, a laser beam 26 for writing-in and weak servo-beams 27-0, 27-1 are projected. For instance, in case the laser beam 26 is deflected to the left, the beam 27-0 and the beam 27-1 exist on the groove part 27 and the metallic layer 3, respectively. Its reflected rays are detected by detectors 19, 20, pass through LPFs21, 22 and a differential amplifier 23, and a servo-control is executed through a phase compensating circuit 24 and a mirror rotation control part 25 by its error signal. In this way, a track servo-control of a recording substrate becomes exact, and also the recording is erased.
JP14896180A 1980-10-24 1980-10-24 Optical recording system Pending JPS5774835A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP14896180A JPS5774835A (en) 1980-10-24 1980-10-24 Optical recording system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP14896180A JPS5774835A (en) 1980-10-24 1980-10-24 Optical recording system

Publications (1)

Publication Number Publication Date
JPS5774835A true JPS5774835A (en) 1982-05-11

Family

ID=15464525

Family Applications (1)

Application Number Title Priority Date Filing Date
JP14896180A Pending JPS5774835A (en) 1980-10-24 1980-10-24 Optical recording system

Country Status (1)

Country Link
JP (1) JPS5774835A (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6122450A (en) * 1984-07-10 1986-01-31 Matsushita Electric Ind Co Ltd Information recording medium and its master recording method and recording/playback method
JPS61172228A (en) * 1984-05-21 1986-08-02 Matsushita Electric Ind Co Ltd Tracking control device
JPS62219247A (en) * 1986-03-20 1987-09-26 Canon Inc Optical recording medium and optical recording method thereof
US5272684A (en) * 1989-08-01 1993-12-21 Mitsubishi Denki Kabushiki Kaisha Information recording method and information recording apparatus for magneto-optic recording information medium
JPH08190738A (en) * 1995-09-22 1996-07-23 Matsushita Electric Ind Co Ltd Master recording method and recording / reproducing method for information recording medium
KR19990057754A (en) * 1997-12-30 1999-07-15 윤종용 How to make a hard disk with servo information

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61172228A (en) * 1984-05-21 1986-08-02 Matsushita Electric Ind Co Ltd Tracking control device
JPS6122450A (en) * 1984-07-10 1986-01-31 Matsushita Electric Ind Co Ltd Information recording medium and its master recording method and recording/playback method
JPS62219247A (en) * 1986-03-20 1987-09-26 Canon Inc Optical recording medium and optical recording method thereof
US5272684A (en) * 1989-08-01 1993-12-21 Mitsubishi Denki Kabushiki Kaisha Information recording method and information recording apparatus for magneto-optic recording information medium
JPH08190738A (en) * 1995-09-22 1996-07-23 Matsushita Electric Ind Co Ltd Master recording method and recording / reproducing method for information recording medium
KR19990057754A (en) * 1997-12-30 1999-07-15 윤종용 How to make a hard disk with servo information

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