SYSTEM FOR STORING HOLOGRAPHIC DATA

摘要

PURPOSE: A storing system of holographic data is provided to stably perform a rotation multiplexing of a storing medium by compensating a position of a playing beam according to a rotational angle of the storing medium. CONSTITUTION: A position compensating piece(180) compensates a position by rotating in an opposite direction to a rotational direction of a storing medium(160). Thus, a playback light is always projected to a CCD(170) from a regular position. A microprocessor(210) controls a rotational angle of the storing medium(160) by controlling a rotational motor(190) at a playback and controls the position compensating piece(180) to rotate in the opposite direction at the same sized rotational angle by controlling the rotational motor(190). The storing medium(160) and the position compensating piece(180) are formed by the same refractive index and the thickness. Thereby, the playback light is exactly projected to the CCD(170) by compensating a change of a displacement in the playback light in the position compensating piece(180).