Method and apparatus for retrieving information from a 3D...

Details Method and apparatus for retrieving information from a 3D... Method and apparatus for retrieving information from a 3D...

2007-09-11

2007-09-11

Korzuch, William (Department: 2627)

Dynamic information storage or retrieval

Specific detail of information handling portion of system

Radiation beam modification of or by storage medium

C369S288000

Reexamination Certificate

active

10507101

ABSTRACT:
A method and apparatus for retrieving information from a three dimensional storage medium uses a three dimensional storage medium having an active medium capable of exhibiting first and second states, a data unit being represented by the ratio between the concentration of the first and second states in a given volume portion of the medium and a data sequence is represented by a sequence of data units. The active medium is irradiated with light as to concentrate light flux through a volume portion of the storage medium so as to generate in the volume portion a detectable non-linear optical response characteristic of the concentration ratio, which is detected and used for tracking.

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