Multilayer combined liquid crystal optical memory systems with means for recording and reading information

摘要

Several embodiments for a new structure of multilayer data carriers of the ROM-, WORM- or RW-type and general modes of writing, reading, deleting and re-writing data to and from them are descended. Each data carrying layer is fabricated as a multi-component structure that constitutes a thin electrically controlled liquid crystal cell with at least one alignment layer made of a photo-anisotropic material which functions as a photosensitive registering layer, in which data can be written. The anisotropic absorbing material may be either fluorescent or non-fluorescent. This type of structure ensures electrical control of absorbing and emitting capacity of fluorescent molecules dispersed in the liquid crystal matrix. This, in its turn, allows partial or complete elimination of fluorescent cross talk from the adjacent data carrying layers in the reading mode both in pit-by-pit and page-by-page modesce increases the number of information layers in the carrier and minimizes parasite aberration distortions in the reading mode.