Hologram recording device and hologram reproduction device

摘要

A hologram record apparatus ( 100 ) includes a spatial light modulator ( 15 ) and a control device ( 18 ). The spatial light modulator ( 15 ) is arranged on an optical path of signal light (L 1 ) and divided into a plurality of cell blocks ( 151 ) arranged in a matrix. Each of the cell blocks ( 151 ) is further divided into a plurality of cells ( 152 ) arranged in a matrix. The spatial light modulator ( 15 ) can perform modulation on the cell basis. The control device ( 18 ) controls the spatial light modulator so as to modulate the signal light according to a plurality of record information sets to be recorded on a hologram record medium ( 200 ). Pluralities of modulation units ( 153 ) existing in the same cell block are not made into identical patterns. Since a plurality of cell blocks having a large pitch as compared to the pixel pitch are simultaneously or successively turned on/off, it is possible to reduce the distance between the zeroth-order light and the higher-order light.