JPS54141605A - Optical information recorder-reproducer - Google Patents

Optical information recorder-reproducer

Info

Publication number
JPS54141605A
JPS54141605A JP5055378A JP5055378A JPS54141605A JP S54141605 A JPS54141605 A JP S54141605A JP 5055378 A JP5055378 A JP 5055378A JP 5055378 A JP5055378 A JP 5055378A JP S54141605 A JPS54141605 A JP S54141605A
Authority
JP
Japan
Prior art keywords
aperture lens
transparent protecting
protecting material
deltax
layer
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
JP5055378A
Other languages
English (en)
Japanese (ja)
Other versions
JPS6223374B2 (enExample
Inventor
Toshio Sato
Tomio Yoshida
Akifumi Nakada
Shunji Harikae
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 JP5055378A priority Critical patent/JPS54141605A/ja
Publication of JPS54141605A publication Critical patent/JPS54141605A/ja
Publication of JPS6223374B2 publication Critical patent/JPS6223374B2/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

Landscapes

  • Optical Recording Or Reproduction (AREA)
  • Optical Head (AREA)
  • Automatic Focus Adjustment (AREA)
JP5055378A 1978-04-26 1978-04-26 Optical information recorder-reproducer Granted JPS54141605A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP5055378A JPS54141605A (en) 1978-04-26 1978-04-26 Optical information recorder-reproducer

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP5055378A JPS54141605A (en) 1978-04-26 1978-04-26 Optical information recorder-reproducer

Publications (2)

Publication Number Publication Date
JPS54141605A true JPS54141605A (en) 1979-11-05
JPS6223374B2 JPS6223374B2 (enExample) 1987-05-22

Family

ID=12862199

Family Applications (1)

Application Number Title Priority Date Filing Date
JP5055378A Granted JPS54141605A (en) 1978-04-26 1978-04-26 Optical information recorder-reproducer

Country Status (1)

Country Link
JP (1) JPS54141605A (enExample)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63168575U (enExample) * 1987-04-20 1988-11-02

Also Published As

Publication number Publication date
JPS6223374B2 (enExample) 1987-05-22

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