Magnetooptic recording medium

Details Magnetooptic recording medium Magnetooptic recording medium

1994-12-15

1996-12-31

Nelms, David C.

Dynamic information storage or retrieval

Storage or retrieval by simultaneous application of diverse...

Magnetic field and light beam

3692752, 369116, 360 59, G11B 700

Patent

active

055900976

ABSTRACT:
A magnetooptic recording medium which includes a substrate and a magnetooptic recording film thereon, the substrate having a surface comparted into a plurality of tracks on which magnetooptic recording signals are recorded, and a part of the tracks, selected from the plurality of tracks, including clusters of pre-pits wherein a variation of a change in light amount due to local birefringence in the vicinity of the pre-pits is not more than 20% with respect to a change in light amount in the absence of the local birefringence, when signals from the tracks with recorded magnetooptic recording signals are measured by changes in light amount on the basis of Kerr rotational angles of reflected light from the medium, which magnetooptic recording medium can be effectively used for a ZCAV system.

REFERENCES:
patent: 5345434 (1994-09-01), Ide et al.
patent: 5400318 (1995-03-01), Nakayama et al.
patent: 5485449 (1996-01-01), Nakajo

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