JPH0531219B2 - - Google Patents

Info

Publication number
JPH0531219B2
JPH0531219B2 JP57082122A JP8212282A JPH0531219B2 JP H0531219 B2 JPH0531219 B2 JP H0531219B2 JP 57082122 A JP57082122 A JP 57082122A JP 8212282 A JP8212282 A JP 8212282A JP H0531219 B2 JPH0531219 B2 JP H0531219B2
Authority
JP
Japan
Prior art keywords
light beam
medium
recording medium
information
modulated
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
JP57082122A
Other languages
English (en)
Japanese (ja)
Other versions
JPS58199448A (ja
Inventor
Masanobu Yamamoto
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.)
Sony Corp
Original Assignee
Sony Corp
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 Sony Corp filed Critical Sony Corp
Priority to JP57082122A priority Critical patent/JPS58199448A/ja
Publication of JPS58199448A publication Critical patent/JPS58199448A/ja
Publication of JPH0531219B2 publication Critical patent/JPH0531219B2/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)
JP57082122A 1982-05-15 1982-05-15 光学式情報記録装置 Granted JPS58199448A (ja)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP57082122A JPS58199448A (ja) 1982-05-15 1982-05-15 光学式情報記録装置

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP57082122A JPS58199448A (ja) 1982-05-15 1982-05-15 光学式情報記録装置

Publications (2)

Publication Number Publication Date
JPS58199448A JPS58199448A (ja) 1983-11-19
JPH0531219B2 true JPH0531219B2 (enrdf_load_stackoverflow) 1993-05-12

Family

ID=13765605

Family Applications (1)

Application Number Title Priority Date Filing Date
JP57082122A Granted JPS58199448A (ja) 1982-05-15 1982-05-15 光学式情報記録装置

Country Status (1)

Country Link
JP (1) JPS58199448A (enrdf_load_stackoverflow)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2506642B2 (ja) * 1985-10-02 1996-06-12 松下電器産業株式会社 情報記録原盤記録方法

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5422281A (en) * 1977-07-15 1979-02-20 Sekisui Plastics Fruit tray
JPS5555313A (en) * 1978-10-20 1980-04-23 Ricoh Co Ltd Driving circuit for acousto-optic element

Also Published As

Publication number Publication date
JPS58199448A (ja) 1983-11-19

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