MAGNETOOPTICAL RECORDING APPARATUS

Title:

MAGNETOOPTICAL RECORDING APPARATUS

Document Type and Number:

WIPO Patent Application WO/1989/012889

Kind Code:

A1

Abstract:

A magnetooptical recording apparatus according to which light spots are successively formed on a magnetooptical disc (2) at a timing of a predetermined reference clock signal (SCK), and record data are magnetically recorded onto the disc (2) by applying a predetermined modulation magnetic field (HM) of which the polarity is inverted depending on the record data in synchronism with the reference clock signals (SCK), wherein the timing for inverting the polarity of the modulation magnetic field (HM) in response to the reference clock signals (SCK) is delayed by a predetermined amount depending upon the characteristics of the disc (2) in order to form a pit (P) at a correct position relative to the timing of the reference clock signal (SCK). Furthermore, the light beam (LA1) is controlled depending upon the temperature of the disc (2) and/or the scanning position of the light spot, in order to form the pit (P) at a correct position relative to the timing of the reference clock signal (SCK).

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Inventors:

WATANABE TETSU (JP)
KAWASHIMA TETSUJI (JP)
FUJITA GORO (JP)

Application Number:

PCT/JP1989/000612

Publication Date:

December 28, 1989

Filing Date:

June 19, 1989

Export Citation:

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Assignee:

SONY CORP (JP)

International Classes:

G11B11/105; G11B11/10; G11B19/14; G11B33/14; (IPC1-7): G11B11/10

Foreign References:

JPS63241740A	1988-10-07
JPS62154250A	1987-07-09
JPS61214266A	1986-09-24
JPS62285258A	1987-12-11
JPH01112551A	1989-05-01

Other References: