JPS541002A - Optical recording information reproducer - Google Patents

Optical recording information reproducer

Info

Publication number
JPS541002A
JPS541002A JP6556777A JP6556777A JPS541002A JP S541002 A JPS541002 A JP S541002A JP 6556777 A JP6556777 A JP 6556777A JP 6556777 A JP6556777 A JP 6556777A JP S541002 A JPS541002 A JP S541002A
Authority
JP
Japan
Prior art keywords
optical recording
recording information
reproducing
information
information reproducer
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
JP6556777A
Other languages
Japanese (ja)
Other versions
JPS5636498B2 (en
Inventor
Manabu Yamamoto
Shuzo Fukunishi
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.)
Nippon Telegraph and Telephone Corp
Original Assignee
Nippon Telegraph and Telephone 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 Nippon Telegraph and Telephone Corp filed Critical Nippon Telegraph and Telephone Corp
Priority to JP6556777A priority Critical patent/JPS541002A/en
Publication of JPS541002A publication Critical patent/JPS541002A/en
Publication of JPS5636498B2 publication Critical patent/JPS5636498B2/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
    • G11B7/085—Disposition or mounting of heads or light sources relatively to record carriers with provision for moving the light beam into, or out of, its operative position or across tracks, otherwise than during the transducing operation, e.g. for adjustment or preliminary positioning or track change or selection
    • G11B7/08547—Arrangements for positioning the light beam only without moving the head, e.g. using static electro-optical elements

Abstract

PURPOSE:To perform high speed track access reading at a high SN ratio by highspeed parallel moving the diffraction grating of continuously changing grating intervals, controlling the beam spacing transmitted light and diffracted light in the diffraction grating and reproducing the information for every track in an apparatus of reproducing the information having been recorded on a rotary recording medium through change in refractive index by using a laser.
JP6556777A 1977-06-03 1977-06-03 Optical recording information reproducer Granted JPS541002A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP6556777A JPS541002A (en) 1977-06-03 1977-06-03 Optical recording information reproducer

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP6556777A JPS541002A (en) 1977-06-03 1977-06-03 Optical recording information reproducer

Publications (2)

Publication Number Publication Date
JPS541002A true JPS541002A (en) 1979-01-06
JPS5636498B2 JPS5636498B2 (en) 1981-08-25

Family

ID=13290708

Family Applications (1)

Application Number Title Priority Date Filing Date
JP6556777A Granted JPS541002A (en) 1977-06-03 1977-06-03 Optical recording information reproducer

Country Status (1)

Country Link
JP (1) JPS541002A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57186009U (en) * 1981-05-21 1982-11-26
EP0144058A2 (en) * 1983-11-28 1985-06-12 Hitachi, Ltd. Apparatus for optically writing information

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57186009U (en) * 1981-05-21 1982-11-26
EP0144058A2 (en) * 1983-11-28 1985-06-12 Hitachi, Ltd. Apparatus for optically writing information

Also Published As

Publication number Publication date
JPS5636498B2 (en) 1981-08-25

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