JPS5740759A - Optical disk device - Google Patents

Optical disk device

Info

Publication number
JPS5740759A
JPS5740759A JP55115072A JP11507280A JPS5740759A JP S5740759 A JPS5740759 A JP S5740759A JP 55115072 A JP55115072 A JP 55115072A JP 11507280 A JP11507280 A JP 11507280A JP S5740759 A JPS5740759 A JP S5740759A
Authority
JP
Japan
Prior art keywords
pits
guide
signal
signal level
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.)
Pending
Application number
JP55115072A
Other languages
Japanese (ja)
Inventor
Teruo Murakami
Isao Hoshino
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.)
Toshiba Corp
Original Assignee
Toshiba Corp
Tokyo Shibaura Electric 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
Application filed by Toshiba Corp, Tokyo Shibaura Electric Co Ltd filed Critical Toshiba Corp
Priority to JP55115072A priority Critical patent/JPS5740759A/en
Publication of JPS5740759A publication Critical patent/JPS5740759A/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
    • G11B7/24—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
    • G11B7/004—Recording, reproducing or erasing methods; Read, write or erase circuits therefor
    • G11B7/0045—Recording

Landscapes

  • Optical Record Carriers And Manufacture Thereof (AREA)
  • Optical Recording Or Reproduction (AREA)

Abstract

PURPOSE:To facilitate tracking control and signal reproduction by detecting a binary signal level and signal width instead of detecting a ternary signal level by forming a recording track by arraying discontinuous guide pits as a substitute for the conventional guide groove. CONSTITUTION:On a light-transmissive disk base plate 6, a photosensitive layer 7 is formed and on its one side, guide pits 8 forming a recording track are arrayed by stamper processing, etc., previously. Recording pits 9 are formed by exposing and removing the guide pits 8 and the photosensitive layer 7 in an area protruding in the lengthwise direction of the guide pits 8. As for a reproduced signal, tracking control is first enabled by discriminating a signal level D at a part other than the pits 8 and 9 and a signal level E at the pits 8 and 9, and bit width of the guide pit 8 part and recording pit 9 part is detected to perform signal detection.
JP55115072A 1980-08-21 1980-08-21 Optical disk device Pending JPS5740759A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP55115072A JPS5740759A (en) 1980-08-21 1980-08-21 Optical disk device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP55115072A JPS5740759A (en) 1980-08-21 1980-08-21 Optical disk device

Publications (1)

Publication Number Publication Date
JPS5740759A true JPS5740759A (en) 1982-03-06

Family

ID=14653474

Family Applications (1)

Application Number Title Priority Date Filing Date
JP55115072A Pending JPS5740759A (en) 1980-08-21 1980-08-21 Optical disk device

Country Status (1)

Country Link
JP (1) JPS5740759A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0189135A2 (en) * 1985-01-25 1986-07-30 Hitachi, Ltd. Recording method and device of optical recording medium
JPS6276480A (en) * 1986-02-14 1987-04-08 Seiko Epson Corp Drive system for step motor for crystal timepiece
JPH0522996A (en) * 1991-09-09 1993-01-29 Seiko Epson Corp Driving method for electronic clock
JPH0633247U (en) * 1992-10-08 1994-04-28 北陽電機株式会社 Motor driven mechanical counter

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0189135A2 (en) * 1985-01-25 1986-07-30 Hitachi, Ltd. Recording method and device of optical recording medium
JPS6276480A (en) * 1986-02-14 1987-04-08 Seiko Epson Corp Drive system for step motor for crystal timepiece
JPH0522996A (en) * 1991-09-09 1993-01-29 Seiko Epson Corp Driving method for electronic clock
JPH0633247U (en) * 1992-10-08 1994-04-28 北陽電機株式会社 Motor driven mechanical counter

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