JPH0127489B2 - - Google Patents

Info

Publication number
JPH0127489B2
JPH0127489B2 JP57080448A JP8044882A JPH0127489B2 JP H0127489 B2 JPH0127489 B2 JP H0127489B2 JP 57080448 A JP57080448 A JP 57080448A JP 8044882 A JP8044882 A JP 8044882A JP H0127489 B2 JPH0127489 B2 JP H0127489B2
Authority
JP
Japan
Prior art keywords
light
light source
optical
recording
minute spot
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
JP57080448A
Other languages
English (en)
Japanese (ja)
Other versions
JPS57203233A (en
Inventor
Shunji Harikae
Tomio Yoshida
Akifumi Nakada
Mitsuro Morya
Toshio Sato
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 JP57080448A priority Critical patent/JPS57203233A/ja
Publication of JPS57203233A publication Critical patent/JPS57203233A/ja
Publication of JPH0127489B2 publication Critical patent/JPH0127489B2/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

  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Optical Recording Or Reproduction (AREA)
  • Optical Head (AREA)
JP57080448A 1982-05-12 1982-05-12 Optical recorder and reproducer Granted JPS57203233A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP57080448A JPS57203233A (en) 1982-05-12 1982-05-12 Optical recorder and reproducer

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP57080448A JPS57203233A (en) 1982-05-12 1982-05-12 Optical recorder and reproducer

Related Parent Applications (1)

Application Number Title Priority Date Filing Date
JP9320977A Division JPS5427406A (en) 1977-08-02 1977-08-02 Optical recorder-reproducer

Publications (2)

Publication Number Publication Date
JPS57203233A JPS57203233A (en) 1982-12-13
JPH0127489B2 true JPH0127489B2 (en]) 1989-05-29

Family

ID=13718537

Family Applications (1)

Application Number Title Priority Date Filing Date
JP57080448A Granted JPS57203233A (en) 1982-05-12 1982-05-12 Optical recorder and reproducer

Country Status (1)

Country Link
JP (1) JPS57203233A (en])

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101143795B1 (ko) * 2002-11-20 2012-06-14 소니 주식회사 광디스크 제조용 원반의 제작 방법 및 광디스크의 제조 방법
KR101047255B1 (ko) 2003-01-09 2011-07-06 소니 주식회사 광 디스크 제조용 원반의 제작 방법 및 광 디스크의 제조방법

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS51109851A (en]) * 1975-03-24 1976-09-29 Japan Broadcasting Corp
JPS5931775B2 (ja) * 1975-08-15 1984-08-04 ソニー株式会社 情報記録媒体の記録再生方法
JPS539101A (en) * 1976-07-12 1978-01-27 Mitsubishi Electric Corp Recording device

Also Published As

Publication number Publication date
JPS57203233A (en) 1982-12-13

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