<p>Provided is a light controller, which has improved assembly positional accuracies of a spatial light modulator and a random phase mask and eliminates positional shift between the spatial light modulator and the random phase mask due to impact and vibration. A light controller (1) is provided with a substrate (2), a light modulation unit (3) arranged on the substrate (2) for modulating light, and a random phase mask (4) laminated on the light modulation unit (3) on an optical axis (5) of the light modulation unit (3).</p>
