Laser beam forming temperature distribution of two peaks on a ma

Details Laser beam forming temperature distribution of two peaks on a ma Laser beam forming temperature distribution of two peaks on a ma

1998-04-30

1999-11-30

Cabeca, John W.

Dynamic information storage or retrieval

Specific detail of information handling portion of system

Radiation beam modification of or by storage medium

369 13, 369 59, 369283, 3692752, G11B 1110

Patent

active

059954728

ABSTRACT:
A method and apparatus for reproducing information on a magneto-optical recording medium can reproduce a signal having a period equal to or smaller than the diffraction limit of light at high speed, can obtain a reproduced signal with a high C/N ratio from a small recorded domain at an amplitude nearly equal to that of a large recorded domain, can greatly improve the recording density and transfer rate, and can also make the reproduction apparatus compact. The information reproduction method includes the steps of irradiating a laser beam onto a medium and forming a temperature distribution having at least two peaks by the laser beam. The apparatus has a laser light source and an optical system for irradiating a laser beam emitted by the light source onto the medium, wherein the laser beam forms the temperature distribution having at least two peaks.

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