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

1994-09-01

1997-10-14

Edun, Muhammad N.

Dynamic information storage or retrieval

Specific detail of information handling portion of system

Radiation beam modification of or by storage medium

369 94, G11B 700

Patent

active

056779038

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: 3946367 (1976-03-01), Wohlmut et al.
patent: 5097464 (1992-03-01), Nishiuchi et al.

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