A fog display, fog screen, vapor screen or vapor display is a system that uses haze machines or water vapor to create a semi-transparent wall, or "curtain" of suspended particles which trapped in a thin sheet (laminar flow) of air and are illuminated by a projector, in order to produce a display whose images seem to float in mid air. Several commercial systems exist, such as FogScreen, Displair and Heliodisplay.
A fog display, fog screen, vapor screen or vapor display is a system that uses haze machines or water vapor to create a semi-transparent wall, or "curtain" of suspended particles which trapped in a thin sheet (laminar flow) of air and are illuminated by a projector, in order to produce a display whose images seem to float in mid air. Several commercial systems exist, such as FogScreen, Displair and Heliodisplay.
Source: Wikipedia "Fog display" · CC BY-SA 4.0
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