Recent advances in laser-based display technology are in the form of devices that create 3D images capable of being viewed from a 180 degrees without distortion. These displays are termed “Volumetric” since they represent images and data inside a volume. As such, points within the display are termed “voxels” for volume pixels. A voxel represents a three dimensional point in space (a point with x,y,z coordinates) . One implementation at the Naval Research And Development Lab  uses a spinning helical mirror that is struck by three laser scanners tuned to the primary colors (Red, Green, Blue). Thus, the technology provides psychological and physiological depth cues needed for true three dimensional imaging.
Wild, Rosemary and Griggs, Kenneth, "Could a Volumetric Display Enhance Decision Making Under Stress?" (1998). AMCIS 1998 Proceedings. 89.