JPS57172550A - Optical disk - Google Patents

Optical disk

Info

Publication number
JPS57172550A
JPS57172550A JP56058267A JP5826781A JPS57172550A JP S57172550 A JPS57172550 A JP S57172550A JP 56058267 A JP56058267 A JP 56058267A JP 5826781 A JP5826781 A JP 5826781A JP S57172550 A JPS57172550 A JP S57172550A
Authority
JP
Japan
Prior art keywords
starting end
address
mark
end detection
detection mark
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
JP56058267A
Other languages
Japanese (ja)
Other versions
JPS6318253B2 (en
Inventor
Kenji Koishi
Tomio Yoshida
Isao Sato
Shunji Harikae
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.)
Panasonic Holdings Corp
Original Assignee
Matsushita Electric Industrial 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 Matsushita Electric Industrial Co Ltd filed Critical Matsushita Electric Industrial Co Ltd
Priority to JP56058267A priority Critical patent/JPS57172550A/en
Priority to DE8181305910T priority patent/DE3172850D1/en
Priority to US06/331,326 priority patent/US5119363A/en
Priority to EP81305910A priority patent/EP0054438B1/en
Publication of JPS57172550A publication Critical patent/JPS57172550A/en
Publication of JPS6318253B2 publication Critical patent/JPS6318253B2/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
    • G11B7/24—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
    • G11B27/00—Editing; Indexing; Addressing; Timing or synchronising; Monitoring; Measuring tape travel
    • G11B27/10—Indexing; Addressing; Timing or synchronising; Measuring tape travel
    • G11B27/19—Indexing; Addressing; Timing or synchronising; Measuring tape travel by using information detectable on the record carrier
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B27/00—Editing; Indexing; Addressing; Timing or synchronising; Monitoring; Measuring tape travel
    • G11B27/10—Indexing; Addressing; Timing or synchronising; Measuring tape travel
    • G11B27/19—Indexing; Addressing; Timing or synchronising; Measuring tape travel by using information detectable on the record carrier
    • G11B27/24—Indexing; Addressing; Timing or synchronising; Measuring tape travel by using information detectable on the record carrier by sensing features on the record carrier other than the transducing track ; sensing signals or marks recorded by another method than the main recording
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B27/00—Editing; Indexing; Addressing; Timing or synchronising; Monitoring; Measuring tape travel
    • G11B27/10—Indexing; Addressing; Timing or synchronising; Measuring tape travel
    • G11B27/19—Indexing; Addressing; Timing or synchronising; Measuring tape travel by using information detectable on the record carrier
    • G11B27/28—Indexing; Addressing; Timing or synchronising; Measuring tape travel by using information detectable on the record carrier by using information signals recorded by the same method as the main recording
    • G11B27/30—Indexing; Addressing; Timing or synchronising; Measuring tape travel by using information detectable on the record carrier by using information signals recorded by the same method as the main recording on the same track as the main recording
    • G11B27/3027—Indexing; Addressing; Timing or synchronising; Measuring tape travel by using information detectable on the record carrier by using information signals recorded by the same method as the main recording on the same track as the main recording used signal is digitally coded
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B2220/00—Record carriers by type
    • G11B2220/20—Disc-shaped record carriers
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B2220/00—Record carriers by type
    • G11B2220/20—Disc-shaped record carriers
    • G11B2220/25—Disc-shaped record carriers characterised in that the disc is based on a specific recording technology
    • G11B2220/2537—Optical discs
    • G11B2220/2587—Laser Discs; Optical disc using analog recording

Landscapes

  • Signal Processing For Digital Recording And Reproducing (AREA)
  • Optical Recording Or Reproduction (AREA)
  • Optical Record Carriers And Manufacture Thereof (AREA)

Abstract

PURPOSE:To detect a starting end position precisely during high-speed retrieval by employing uneven phase groove structure for a rotation starting end detection mark for detecting one turn of an optical disk, and an address starting end detection mark for detecting the position of the address area of each track. CONSTITUTION:At the circumference part of an optical disk provided with two address areas 1 on concentric circular groove-shaped guide tracks, an address starting end detection mark (address mark) 3 is formed in an arc having an angle equal to that of the address areas 1 as the same groove structure body with the track guide groove similarly to a sector starting end detection mark 4 and a rotation starting end detection mark 5 for detecting one turn of the disk. Consequently, a detection system for an index mark area 7 only detects the overall reflectivity of an index mark 10, so an inexpensive incoherent photodetection system is usable. Therefore, a starting end position is detected stably and precisely even during high-speed retrieval.
JP56058267A 1980-12-17 1981-04-16 Optical disk Granted JPS57172550A (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
JP56058267A JPS57172550A (en) 1981-04-16 1981-04-16 Optical disk
DE8181305910T DE3172850D1 (en) 1980-12-17 1981-12-16 Optical disk having an index mark
US06/331,326 US5119363A (en) 1980-12-17 1981-12-16 Optical disk having an index mark
EP81305910A EP0054438B1 (en) 1980-12-17 1981-12-16 Optical disk having an index mark

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP56058267A JPS57172550A (en) 1981-04-16 1981-04-16 Optical disk

Publications (2)

Publication Number Publication Date
JPS57172550A true JPS57172550A (en) 1982-10-23
JPS6318253B2 JPS6318253B2 (en) 1988-04-18

Family

ID=13079387

Family Applications (1)

Application Number Title Priority Date Filing Date
JP56058267A Granted JPS57172550A (en) 1980-12-17 1981-04-16 Optical disk

Country Status (1)

Country Link
JP (1) JPS57172550A (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59161586U (en) * 1983-04-14 1984-10-29 株式会社東芝 information storage medium
JPS6010459A (en) * 1983-06-30 1985-01-19 Toshiba Corp Disc device
JPS60236134A (en) * 1984-05-09 1985-11-22 Hitachi Maxell Ltd Discoidal recording medium
JPS61172233A (en) * 1985-01-25 1986-08-02 Nec Corp Substrate for optical disk
JPH02156446A (en) * 1988-12-07 1990-06-15 Nec Corp Magneto-optical disk medium
JPH0845082A (en) * 1995-06-12 1996-02-16 Toshiba Corp Information reproducing disk and both side information reproducing disk

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5567948A (en) * 1978-11-06 1980-05-22 Philips Nv Data storing optical disk type recording medium
JPS55103854U (en) * 1979-01-10 1980-07-19

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5567948A (en) * 1978-11-06 1980-05-22 Philips Nv Data storing optical disk type recording medium
JPS55103854U (en) * 1979-01-10 1980-07-19

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59161586U (en) * 1983-04-14 1984-10-29 株式会社東芝 information storage medium
JPS6010459A (en) * 1983-06-30 1985-01-19 Toshiba Corp Disc device
JPS60236134A (en) * 1984-05-09 1985-11-22 Hitachi Maxell Ltd Discoidal recording medium
JPS61172233A (en) * 1985-01-25 1986-08-02 Nec Corp Substrate for optical disk
JPH047019B2 (en) * 1985-01-25 1992-02-07 Nippon Electric Co
JPH02156446A (en) * 1988-12-07 1990-06-15 Nec Corp Magneto-optical disk medium
JPH0845082A (en) * 1995-06-12 1996-02-16 Toshiba Corp Information reproducing disk and both side information reproducing disk

Also Published As

Publication number Publication date
JPS6318253B2 (en) 1988-04-18

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