A free-space display is a device that projects images into a volume of free space (i.e., into an aerosol mixture such as fog or a gas). Commonly a set of lasers with rotating mirrors are used (a laser light show). Such displays have limited imaging capability but are 3D. Alternately a powerful projector may be focused on a narrow wall of suspended aerosol. This is much like a transparent projection screen, and is marketed for interactive displays.
Examples
This entry is from Wikipedia, the leading user-contributed encyclopedia. It may not have been reviewed by professional editors (see full disclaimer)
