Multi-layer information storage system with improved aberration

Details Multi-layer information storage system with improved aberration Multi-layer information storage system with improved aberration

1997-05-21

1998-11-24

Edun, Muhammad N.

Dynamic information storage or retrieval

Systems having plural physically distinct independent tracks...

Having layered storage medium

369112, 369 4411, G11B 700

Patent

active

058417532

ABSTRACT:
An optical information storage system has a multi-recording-layer record carrier and a scanner device for the carrier. The scanner produces a radiation beam which is compensated for spherical aberration for a single height of the scanning spot with the stack of layers. The height of the stack is determined by the maximum spherical aberration permissible for the system. The number of layers in the stack is determined by the minimum distance between layers, which depends on the crosstalk in the error signals due to currently unscanned layers.

REFERENCES:
patent: 5499231 (1996-03-01), Fennema et al.
patent: 5511057 (1996-04-01), Holtslag et al.
patent: 5513170 (1996-04-01), Best et al.
patent: 5526338 (1996-06-01), Hasman et al.
patent: 5627814 (1997-05-01), Lee
patent: 5636190 (1997-06-01), Choi

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