SPATIAL MULTIPLEXING DEVICE FOR HOLOGRAPHIC MEMORY AND VOLUME HOLOGRAPHIC DIGITAL DATA STORAGE SYSTEM THEREWITH

摘要

The present invention relates to a volume holographic digital data storage system having an angle and spatial overlapping device for a holographic memory, wherein the object light modulated from the spatial light modulator 30 is incident, and the reference light is reflected. A rotatable table in which the mirrors 28 are incident and the holographic data of the interference fringe is recorded, and each of the plurality of photorefractive crystals 60 is arranged at equal intervals ( 120 and an actuator 110 for rotating the table 120, the table 12 is micro-rotated when the angle overlaps, and the hologram data are angularly overlapped, and when the space overlaps, the optical refraction crystal 60 is spaced apart. It is rotated to record hologram data.;According to the present invention, since the table is finely rotated when the angle overlaps, and rotates to the next optical refraction crystal when the space is overlapped, as well as the conventional AOD for angle and space overlap as well as the frequency correction device accordingly, there is no need In short, it has the effect that the system can be configured at low cost while achieving a light and small short.