Extending bit-oriented optical data storage into the third dimension

Summary form only given. The extension of bit-oriented optical data storage into the third dimension appears to become one of the more promising approaches to satisfy the quest for removable ultra high density data storage systems for the 2000s. The advent of two-layer digital velocity display products has shown the economical feasibility of the use of this dimension. Since the impact of storing bits in the third dimension linearly increases with the density of stored bits in this dimension, significant additional gains in storage capacities per platter can be obtained by increasing the number of layers. The approach taken by Call/Recall, Inc., relies on two-photon absorption for recording bits in the volume of a photochromic plastic media to fully exploit the third dimension.