JPH0570212B2 - - Google Patents

Info

Publication number
JPH0570212B2
JPH0570212B2 JP58002428A JP242883A JPH0570212B2 JP H0570212 B2 JPH0570212 B2 JP H0570212B2 JP 58002428 A JP58002428 A JP 58002428A JP 242883 A JP242883 A JP 242883A JP H0570212 B2 JPH0570212 B2 JP H0570212B2
Authority
JP
Japan
Prior art keywords
recording
light beam
erasing
information
optical
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 - Lifetime
Application number
JP58002428A
Other languages
English (en)
Japanese (ja)
Other versions
JPS59127243A (ja
Inventor
Tetsuo Hosomi
Toshiaki Kashihara
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 JP58002428A priority Critical patent/JPS59127243A/ja
Publication of JPS59127243A publication Critical patent/JPS59127243A/ja
Publication of JPH0570212B2 publication Critical patent/JPH0570212B2/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
    • G11B7/135—Means for guiding the beam from the source to the record carrier or from the record carrier to the detector
    • G11B7/1398—Means for shaping the cross-section of the beam, e.g. into circular or elliptical cross-section

Landscapes

  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Optical Head (AREA)
JP58002428A 1983-01-11 1983-01-11 光学的記録再生装置 Granted JPS59127243A (ja)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP58002428A JPS59127243A (ja) 1983-01-11 1983-01-11 光学的記録再生装置

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP58002428A JPS59127243A (ja) 1983-01-11 1983-01-11 光学的記録再生装置

Publications (2)

Publication Number Publication Date
JPS59127243A JPS59127243A (ja) 1984-07-23
JPH0570212B2 true JPH0570212B2 (ko) 1993-10-04

Family

ID=11528984

Family Applications (1)

Application Number Title Priority Date Filing Date
JP58002428A Granted JPS59127243A (ja) 1983-01-11 1983-01-11 光学的記録再生装置

Country Status (1)

Country Link
JP (1) JPS59127243A (ko)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS55157135A (en) * 1979-05-21 1980-12-06 Hitachi Ltd Information reader
JPS5629785U (ko) * 1979-08-10 1981-03-20

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS55157135A (en) * 1979-05-21 1980-12-06 Hitachi Ltd Information reader
JPS5629785U (ko) * 1979-08-10 1981-03-20

Also Published As

Publication number Publication date
JPS59127243A (ja) 1984-07-23

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