Three-dimensional optical memory medium and process for producing same

摘要

The invention relates to a three-dimensional optical memory medium capable of recording and reading a large quantity of information therein and therefrom, and a process for producing the same. A recording pulsed laser beam is applied to an arbitrary position in a luminescent-ion-containing solid medium as the solid medium is three-dimensionally moved relative to a converging point of the pulsed laser beam.