A phase computation device according to an aspect of the present technology comprises a coordinate determination unit and a computation unit. The coordinate determination unit determines spatial coordinates whereat an interference pattern of oscillator phased array-generated ultrasound waves, electromagnetic waves, or other waves are to be presented. The computation unit computes an initial phase for each of the oscillators in such a way that the sum of the wave energy densities at each point of the spatial coordinates is maximal.
PHASE COMPUTATION DEVICE, PHASE COMPUTATION METHOD, TACTILE SENSATION PRESENTATION SYSTEM, AND PROGRAM