Fogscreen is a holoprojection method that utilises a layer of artificially
fogged air as a display screen for projected content. It in effect, creates
a cascading curtain of wet air that can be walked through whilst displaying
moving, bright, images.
The projection system uses a thin curtain of micro-droplets, hemmed in both
front and back by a constant stream of downward moving air, generated by the
projection system. This sandwiching, turbulence-free airflow actually stabilises
the fog layer, reducing flickering. Additionally, it constrains the fog, keeping
the particles to a thin area, thin enough that people can walk through it, without
system itself is a rear projection system with the actual projection system
being behind the curtain of fog particles, projecting its images onto them.
Objects such as people between the projector and the screen will thusly damage
the image projection. Additionally because of the scattering effect of the moving
water droplets, in order to obtain good images content should employ bright
colors, high contrast images, and motion.
Like most such systems, Fogscreen does not handle black well, so a black backdrop
seen behind and through the fogscreen is advised by the company to maintain
a crispness of image.
First created in 2002, and only having entered commercial production in 2005,
the Finnish system is primarily a rented one, and has been used for conferences,
business events and theme parks across the globe, gathering an impressive resume
in six short years. It is available for purchase, but few smaller organisations
have the resources necessary to house and maintain the system, which requires
significant technical skill.
Gesture trackers for interaction with Fogscreen, allowing users to change and
manipulate data it displays, do work, but only if the gesture recognition system
uses infra-red, to which the fog is invisible. Laser or sonic wave based triangulation
systems do not work close to the fog, as the sound waves trigger turbulence
and laser light is scattered.
Height 65 cm (25.6")
Depth 90 cm (35.4")
Width 2.31 m (91")
Approximately 130 kg (290 lbs)
Operating voltage is 100-120 V, max 20 A / 200-240 V, max 10 A 2 kW
From 3 to 10 litres of water used per hour, depending on fog output.
Water feed is regulated
Normal room temperature, designed for indoor use.
The operating temperature range is between +5 and +40 degrees Celsius.