Volumetric 3D displays.

Volumetric displays enable electronically processed images to be depicted within a transparent volume, and so they are able to occupy three spatial dimensions. A broad range of depth cues are inherently associated with such images, including the parallax and oculomotor cues. Accommodation-convergence breakdown and depth cue conflict are avoided. Here we review aspects of this display modality, identify various key characteristics, and refer to a number of exemplar technologies. Brief consideration is given to the formation of opaque images and the implementation of an ethereal form of image space.