JPS533202A - Information reproducer - Google Patents

Information reproducer

Info

Publication number
JPS533202A
JPS533202A JP7747976A JP7747976A JPS533202A JP S533202 A JPS533202 A JP S533202A JP 7747976 A JP7747976 A JP 7747976A JP 7747976 A JP7747976 A JP 7747976A JP S533202 A JPS533202 A JP S533202A
Authority
JP
Japan
Prior art keywords
information reproducer
thershold
diffraction
acute
making
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.)
Pending
Application number
JP7747976A
Other languages
Japanese (ja)
Inventor
Kazuo Okada
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.)
Mitsubishi Electric Corp
Original Assignee
Mitsubishi Electric 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 Mitsubishi Electric Corp filed Critical Mitsubishi Electric Corp
Priority to JP7747976A priority Critical patent/JPS533202A/en
Publication of JPS533202A publication Critical patent/JPS533202A/en
Pending 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
    • G11B7/125—Optical beam sources therefor, e.g. laser control circuitry specially adapted for optical storage devices; Modulators, e.g. means for controlling the size or intensity of optical spots or optical traces

Landscapes

  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Optical Head (AREA)

Abstract

PURPOSE:To prevent crosstalks between neighbouring tracks by means of synthesizing plural numbers of light beams spots condensed up to the diffraction thershold in an optical video disk and so on, thereby making the intensity distribution acute.
JP7747976A 1976-06-29 1976-06-29 Information reproducer Pending JPS533202A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP7747976A JPS533202A (en) 1976-06-29 1976-06-29 Information reproducer

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP7747976A JPS533202A (en) 1976-06-29 1976-06-29 Information reproducer

Publications (1)

Publication Number Publication Date
JPS533202A true JPS533202A (en) 1978-01-12

Family

ID=13635106

Family Applications (1)

Application Number Title Priority Date Filing Date
JP7747976A Pending JPS533202A (en) 1976-06-29 1976-06-29 Information reproducer

Country Status (1)

Country Link
JP (1) JPS533202A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59178635A (en) * 1983-03-29 1984-10-09 Victor Co Of Japan Ltd Optical recording device
US7236433B2 (en) 2002-08-02 2007-06-26 Hitachi, Ltd. System and method of recording and reproducing information

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59178635A (en) * 1983-03-29 1984-10-09 Victor Co Of Japan Ltd Optical recording device
US7236433B2 (en) 2002-08-02 2007-06-26 Hitachi, Ltd. System and method of recording and reproducing information

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