Owing to the advantages in high storage capacity, fast data transfer rate, and short access time, volume holographic memories (VHM) are considered to meet the needs.

体全息存储器因其存储密度高、存储容量巨大、存取速度极快的独特优势，可望满足这种需求。

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Unlike DVDs, which store data in thin layers just beneath the surface of the disc, holographic storage encodes information in three dimensions, within the volume of the disc.

不像dvd盘那样把数据存储到磁盘表面下的薄层中，全息存储技术在磁盘容量内以三纬形式对信息进行编码。

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For control system: we introduce a novel control system for volume holographic data storage from the aspects of both hardware structure and software realization.

控制系统方面：从硬件和软件两方面着手，设计并实现了一套全新的体全息数据存储控制系统。

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