Volumetric holographic digital data storage systems and optical elements for storing holographic data used therein

摘要

The present invention relates to a volume holographic digital data storage system and an optical element for storing holographic data used therein, the system comprising a beam splitter 20 for dividing a laser incident from a light source 10 into a reference beam and an object beam, A spatial light modulator 30 for modulating the object light through a reflection mirror 22 in units of pages of binary data of light and darkness formed by pixels according to input data, A light reflective crystal 40 incident on the modulated object light via a series of lenses 52 and incident through a series of lenses 26 and a rotatable reflective mirror 28, State image pickup device 50 in which the interference fringe recorded by the reference light and the object light incident on the solid-state image pickup device 50 is restored into a checkered pattern by irradiation of the reference light, and the restored pattern is read out It becomes lure, characterized in that bonding the spatial light modulator 30 and the solid-state image sensor 50 to the left and right side surfaces of the light-reflective crystal (40).;According to the present invention, by using a novel holographic data storage optical element in which a spatial light modulator and a solid-state image pickup element are bonded to the left and right sides, the optical path is reduced, thereby minimizing the error and simplifying the structure. It has the effect of reducing.