JPS6343812B2 - - Google Patents

Info

Publication number
JPS6343812B2
JPS6343812B2 JP55049235A JP4923580A JPS6343812B2 JP S6343812 B2 JPS6343812 B2 JP S6343812B2 JP 55049235 A JP55049235 A JP 55049235A JP 4923580 A JP4923580 A JP 4923580A JP S6343812 B2 JPS6343812 B2 JP S6343812B2
Authority
JP
Japan
Prior art keywords
signal
pits
recording
clock
recorded
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.)
Expired
Application number
JP55049235A
Other languages
English (en)
Japanese (ja)
Other versions
JPS56148739A (en
Inventor
Takeshi Maeda
Kazuo Shigematsu
Seiji Yonezawa
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.)
Hitachi Ltd
Original Assignee
Hitachi 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 Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP4923580A priority Critical patent/JPS56148739A/ja
Priority to US06/160,199 priority patent/US4364118A/en
Priority to DE8080103574T priority patent/DE3072052D1/de
Priority to EP80103574A priority patent/EP0021411B1/de
Priority to CA000354741A priority patent/CA1138106A/en
Publication of JPS56148739A publication Critical patent/JPS56148739A/ja
Publication of JPS6343812B2 publication Critical patent/JPS6343812B2/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

Landscapes

  • Optical Recording Or Reproduction (AREA)
  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
JP4923580A 1979-06-25 1980-04-16 Optical information processing unit Granted JPS56148739A (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
JP4923580A JPS56148739A (en) 1980-04-16 1980-04-16 Optical information processing unit
US06/160,199 US4364118A (en) 1979-06-25 1980-06-17 Optical disk and optical information processor
DE8080103574T DE3072052D1 (en) 1979-06-25 1980-06-24 Optical disk and optical information processor
EP80103574A EP0021411B1 (de) 1979-06-25 1980-06-24 Optische Speicherplatte und Einrichtung zur Verarbeitung optischer Informationen
CA000354741A CA1138106A (en) 1979-06-25 1980-06-25 Optical disk and optical information processor

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP4923580A JPS56148739A (en) 1980-04-16 1980-04-16 Optical information processing unit

Related Child Applications (2)

Application Number Title Priority Date Filing Date
JP24628589A Division JPH02118924A (ja) 1989-09-25 1989-09-25 情報処理装置
JP24628689A Division JPH02118918A (ja) 1989-09-25 1989-09-25 情報処理装置

Publications (2)

Publication Number Publication Date
JPS56148739A JPS56148739A (en) 1981-11-18
JPS6343812B2 true JPS6343812B2 (de) 1988-09-01

Family

ID=12825224

Family Applications (1)

Application Number Title Priority Date Filing Date
JP4923580A Granted JPS56148739A (en) 1979-06-25 1980-04-16 Optical information processing unit

Country Status (1)

Country Link
JP (1) JPS56148739A (de)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4456981A (en) * 1982-03-19 1984-06-26 Magnetic Peripherals Inc. Modulation system for optical recording
NL8800152A (nl) * 1988-01-22 1989-08-16 Philips Nv Optische uitleesbare registratiedrager van het beschrijfbare type, een inrichting voor het vervaardigen van een dergelijke registratiedrager, en inrichtingen voor het optekenen en/of uitlezen van informatie op/uit een dergelijke registratiedrager.
JP2754876B2 (ja) * 1990-07-05 1998-05-20 株式会社ケンウッド 追記形光ディスク装置

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5046429A (de) * 1973-08-31 1975-04-25
JPS54130102A (en) * 1978-03-16 1979-10-09 Philips Nv Method of writing information* recording carrier* recorded record carrier* and information writing and reading device

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5046429A (de) * 1973-08-31 1975-04-25
JPS54130102A (en) * 1978-03-16 1979-10-09 Philips Nv Method of writing information* recording carrier* recorded record carrier* and information writing and reading device

Also Published As

Publication number Publication date
JPS56148739A (en) 1981-11-18

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