Magento-optical recording method using a multi-pulse pattern gen

Details Magento-optical recording method using a multi-pulse pattern gen Magento-optical recording method using a multi-pulse pattern gen

1996-08-01

1998-05-26

Dinh, Tan

Dynamic information storage or retrieval

Storage or retrieval by simultaneous application of diverse...

Magnetic field and light beam

369116, 369 59, G11B 1100

Patent

active

057577358

ABSTRACT:
In a magneto-optical recording method and, more particularly, a bit position recording method, laser beam intensity is pulse-modulated between high and low levels according to data to be recorded. The modulated laser beam is radiated on a recording medium under the presence of a bias field. High-level emission time of the laser beam is shortened at the inner portion of the medium, and is prolonged at the outer portion. Low-level intensity of the laser beam is decreased at the inner portion of the medium, and is increased at the outer portion, thereby increasing C/N ratio upon reproduction.

REFERENCES:
patent: 5170382 (1992-12-01), Yamada et al.
patent: 5200935 (1993-04-01), Watanabe et al.
patent: 5365501 (1994-11-01), Fuji et al.
patent: 5450381 (1995-09-01), Tsukamura et al.

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