Patent ID: 6205106
Filing Date: 2001-03-20
Classification: G11B,G11C

Abstract:
A device for storing and retrieving information comprising:a first light source for generating a first light beam;an electrooptical means having an electric input for receiving data and being arranged in a matrix having individually addressable matrix elements for modulating said first light beam in dependence of said data;a storage medium provided in the beam path of said first light beam after said electrooptical means, said storage medium comprising a plurality of pages, each page having a plurality of individual cells, and optical properties of said individual cells of said storage medium being changed by said first light beam to correspond to said data, said storage medium is a side-chain liquid crystalline polyester film;a second light source for exposing at least one page of said storage medium to a second light beam without changing the optical properties thereof; andat least one optical means positioned on an optical axis between said storage medium and said electrooptical means and having a telecentric objective, said optical means forming a first image of said matrix emitted from said electrooptical means on said storage medium or magnifying said page of said storage medium to form a second image on a detecting matrix, said first image having pixels corresponding to said matrix elements and said second image having pixels corresponding to said cells, and said detecting matrix being operatively connected to a central unit for transferring said second image detected by said detecting matrix.