JPS56148739A - Optical information processing unit - Google Patents

Optical information processing unit

Info

Publication number
JPS56148739A
JPS56148739A JP4923580A JP4923580A JPS56148739A JP S56148739 A JPS56148739 A JP S56148739A JP 4923580 A JP4923580 A JP 4923580A JP 4923580 A JP4923580 A JP 4923580A JP S56148739 A JPS56148739 A JP S56148739A
Authority
JP
Japan
Prior art keywords
disc
laser
signal
light
clock
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
JP4923580A
Other languages
English (en)
Other versions
JPS6343812B2 (ja
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/en
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 (en) 1979-06-25 1980-06-24 Optical disk and optical information processor
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 true JPS56148739A (en) 1981-11-18
JPS6343812B2 JPS6343812B2 (ja) 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 (ja)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58166551A (ja) * 1982-03-19 1983-10-01 コントロール　データ　コーポレーシヨン 光学的記録用デイスク形記録保持媒体
JPH01224929A (ja) * 1988-01-22 1989-09-07 Philips Gloeilampenfab:Nv 光学的に読み出し可能な書込可能型記録担体及びそのような記録担体を製造する方法及びそのような記録担体を用いて情報の記録／再生を行う装置
JPH0464976A (ja) * 1990-07-05 1992-02-28 Kenwood Corp 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 (ja) * 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 (ja) * 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

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58166551A (ja) * 1982-03-19 1983-10-01 コントロール　データ　コーポレーシヨン 光学的記録用デイスク形記録保持媒体
JPH01224929A (ja) * 1988-01-22 1989-09-07 Philips Gloeilampenfab:Nv 光学的に読み出し可能な書込可能型記録担体及びそのような記録担体を製造する方法及びそのような記録担体を用いて情報の記録／再生を行う装置
JPH0464976A (ja) * 1990-07-05 1992-02-28 Kenwood Corp 追記形光ディスク装置

Also Published As

Publication number Publication date
JPS6343812B2 (ja) 1988-09-01

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