| 摘要 |
PURPOSE: A system for storing volume holographic digital data is provided to modulate more many data quantity by modulating the phase of a reference beam to have inter-different phases and storing the modulated reference beam in a storing medium. CONSTITUTION: An optical source(10) generates a laser light requested for holography. An optical splitter(20) splits the laser light provided from the optical source(10) into a reference beam and an object beam. The first rotation mirror(40) reflects the object beam at a certain angle. A space optical modulator(50) modulates the object beam reflected from the first mirror(40) by one page unit of shading binary data in which pixels are formed according to data inputted from the outside. The second rotation mirror(30) reflects the reference beam at a certain angle. A phase modulator(100) modulates the phase of the reference beam reflected by the second rotation mirror(30). The phase modulator(100) has a piezoelectric material, electrodes and an insulating material. If a certain voltage is supplied, the piezoelectric material is swollen. The electrodes supply the certain voltage to the piezoelectric material. If the certain voltage is supplied by the electrodes, the insulating material supports the piezoelectric material so that the piezoelectric material is swollen in an optical progress path direction. A storing medium(60) stores an interference pattern between the reference beam modulated by the phase modulator(100) and the object beam modulated by the space optical modulator(50).
|
