Reading device for multi-layered optical information carrier

Details Reading device for multi-layered optical information carrier Reading device for multi-layered optical information carrier

1992-05-29

1993-10-05

Dzierzynski, Paul M.

Dynamic information storage or retrieval

Specific detail of information handling portion of system

Radiation beam modification of or by storage medium

369 94, 369100, 369112, G11B 712

Patent

active

052511987

ABSTRACT:
A device for reading data stored in a high density multi-layered optical information carrier. Data which is stored in a carrier having a plurality of partially reflective data layers is read by wavefront shearing interferometry with low interlayer crosstalk. This allows data layers to be more closely spaced than previously possible thereby reducing spherical aberration and increasing the data density.

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