JPS54107706A - Information recording medium - Google Patents

Information recording medium

Info

Publication number
JPS54107706A
JPS54107706A JP1554078A JP1554078A JPS54107706A JP S54107706 A JPS54107706 A JP S54107706A JP 1554078 A JP1554078 A JP 1554078A JP 1554078 A JP1554078 A JP 1554078A JP S54107706 A JPS54107706 A JP S54107706A
Authority
JP
Japan
Prior art keywords
lens
wavelength
light
recording
medium
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
JP1554078A
Other languages
English (en)
Japanese (ja)
Other versions
JPS6243257B2 (enrdf_load_stackoverflow
Inventor
Takafumi Sugano
Yoshihiro Okino
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 JP1554078A priority Critical patent/JPS54107706A/ja
Publication of JPS54107706A publication Critical patent/JPS54107706A/ja
Publication of JPS6243257B2 publication Critical patent/JPS6243257B2/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
    • G11B7/08—Disposition or mounting of heads or light sources relatively to record carriers
    • G11B7/09—Disposition or mounting of heads or light sources relatively to record carriers with provision for moving the light beam or focus plane for the purpose of maintaining alignment of the light beam relative to the record carrier during transducing operation, e.g. to compensate for surface irregularities of the latter or for track following
    • G11B7/0908—Disposition or mounting of heads or light sources relatively to record carriers with provision for moving the light beam or focus plane for the purpose of maintaining alignment of the light beam relative to the record carrier during transducing operation, e.g. to compensate for surface irregularities of the latter or for track following for focusing only

Landscapes

  • Optical Record Carriers And Manufacture Thereof (AREA)
JP1554078A 1978-02-13 1978-02-13 Information recording medium Granted JPS54107706A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1554078A JPS54107706A (en) 1978-02-13 1978-02-13 Information recording medium

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1554078A JPS54107706A (en) 1978-02-13 1978-02-13 Information recording medium

Publications (2)

Publication Number Publication Date
JPS54107706A true JPS54107706A (en) 1979-08-23
JPS6243257B2 JPS6243257B2 (enrdf_load_stackoverflow) 1987-09-12

Family

ID=11891620

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1554078A Granted JPS54107706A (en) 1978-02-13 1978-02-13 Information recording medium

Country Status (1)

Country Link
JP (1) JPS54107706A (enrdf_load_stackoverflow)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57189358A (en) * 1981-05-15 1982-11-20 Pioneer Video Corp Production of original disc for information recording
US4421553A (en) * 1980-05-06 1983-12-20 Centre De Recherches Metallurgiques Process for operating a blast furnace
JPS603620A (ja) * 1983-06-21 1985-01-10 Mitsubishi Electric Corp 微細パタ−ンの形成方法

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4421553A (en) * 1980-05-06 1983-12-20 Centre De Recherches Metallurgiques Process for operating a blast furnace
JPS57189358A (en) * 1981-05-15 1982-11-20 Pioneer Video Corp Production of original disc for information recording
JPS603620A (ja) * 1983-06-21 1985-01-10 Mitsubishi Electric Corp 微細パタ−ンの形成方法

Also Published As

Publication number Publication date
JPS6243257B2 (enrdf_load_stackoverflow) 1987-09-12

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