Abstract:In order to achieve the practical applications of three-dimensional optical information storage, a unilateral reading and written pick-up head was proposed for three-dimensional data storage. The optical and control systems of the pick-up head were designed, a specially designed coupling beam splitter was used to make beam coupling and decoupling, and also data layer selection was realized by the way of dual voice coil motor controlling lens. And the focus servo system was modeled and simulated. The results show that synchronization error of the dual-beam focus can be kept within ±3μm.
