JPH04188403A - Optical magnetic recording reproducer - Google Patents

Optical magnetic recording reproducer

Info

Publication number
JPH04188403A
JPH04188403A JP31596890A JP31596890A JPH04188403A JP H04188403 A JPH04188403 A JP H04188403A JP 31596890 A JP31596890 A JP 31596890A JP 31596890 A JP31596890 A JP 31596890A JP H04188403 A JPH04188403 A JP H04188403A
Authority
JP
Grant status
Application
Patent type
Prior art keywords
information
magnetic
recording
reproduction
magnetic field
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
JP31596890A
Other versions
JP2935375B2 (en )
Inventor
Hiroaki Hoshi
Susumu Matsumura
Hideki Morishima
Eiji Yamaguchi
Masakuni Yamamoto
Original Assignee
Canon Inc
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

Links

Abstract

PURPOSE: To enable high-density recording by detecting the direction of magnetization of an information magnetic domain recorded on an information track and changing over and controlling the direction of the magnetic field of a magnetic-field applying means on the basis of a detection result.
CONSTITUTION: The upper section of an information track is irradiated with a light spot using the light intensity of a semiconductor laser 7 as recording power. A bias magnetic field modulated in response to recording information is applied simultaneously from a magnetic head 1, and an information magnetic domain is formed onto the information track. The light intensity of the semiconductor laser 7 is lowered to reproduction power in the reproduction of information, and the light spot of luminous flux for reproduction is scanned on the information track. On the other hand, the magnetic head 1 generates a magnetic field H weaker than that at the time of recording, and the magnetic field H is applied to the information track. The magnetic field for reproduction is controlled so as to be directed in the same direction as the direction of magnetization of the information magnetic domain, moves the domain wall of the information magnetic domain and functions to increase the magnitude of the magnetic domain. Accordingly, a reproduction density limit can be relaxed, thus further augmenting the recording density of a recording medium.
COPYRIGHT: (C)1992,JPO&Japio
JP31596890A 1990-11-22 1990-11-22 Magneto-optical recording and reproducing apparatus Expired - Fee Related JP2935375B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP31596890A JP2935375B2 (en) 1990-11-22 1990-11-22 Magneto-optical recording and reproducing apparatus

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP31596890A JP2935375B2 (en) 1990-11-22 1990-11-22 Magneto-optical recording and reproducing apparatus

Publications (2)

Publication Number Publication Date
JPH04188403A true true JPH04188403A (en) 1992-07-07
JP2935375B2 JP2935375B2 (en) 1999-08-16

Family

ID=18071753

Family Applications (1)

Application Number Title Priority Date Filing Date
JP31596890A Expired - Fee Related JP2935375B2 (en) 1990-11-22 1990-11-22 Magneto-optical recording and reproducing apparatus

Country Status (1)

Country Link
JP (1) JP2935375B2 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0899727A2 (en) * 1997-09-01 1999-03-03 Canon Kabushiki Kaisha Signal-reproducing method utilizing magnetic domain wall displacement and apparatus therefor

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0899727A2 (en) * 1997-09-01 1999-03-03 Canon Kabushiki Kaisha Signal-reproducing method utilizing magnetic domain wall displacement and apparatus therefor
EP0899727A3 (en) * 1997-09-01 2000-03-15 Canon Kabushiki Kaisha Signal-reproducing method utilizing magnetic domain wall displacement and apparatus therefor
US6345016B1 (en) 1997-09-01 2002-02-05 Canon Kabushiki Kaisha Signal-reproducing method and apparatus utilizing light beam generated temperature distribution and magnetic domain wall displacement

Also Published As

Publication number Publication date Type
JP2935375B2 (en) 1999-08-16 grant

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Legal Events

Date Code Title Description
LAPS Cancellation because of no payment of annual fees