Dr. Tech. Ismo Rakkolainen and Professor Karri Palovuori from the Tampere University of Technology, Finland, have published new information on their revolutionary fog screen technology, recently presented at Siggraph 2003. The world premiere demonstration was at the Science Fair in Turku, Finland in October 2002, but the two scientist now claim their technology has evolved enough to make make the images projected on to dry ice fog stable even when walked through, which actually allows use of it in exhibitions or presentations.



The key features are, that the screen is flat, enabling high-quality projections and walking through is possible. The fog screen has no hard material graspable and does not make things wet. It creates a magical effect as if the images are floating in thin air. This work has international patents pending. The basic components of the screen are a laminar, non-turbulent airflow, and a thin fog screen (or any particles) injected into and inside a laminar flow. Created this way, the fog screen is an internal part of the laminar airflow, and remains thin, crisp, and protected from turbulence. When the screen is formed, images can be either rear- or front-projected onto it. The screen can be translucent (as in the images below) or fully opaque. The current fog screen prototype already proves the operating principle with excellent results. The quality, size, and other features of the screen will be enhanced in the coming weeks. Video: MPEG video of the musem prototype (Windows Media 9 format (720x576 - 1 min. 15 sec. approx. running time, 21 MB)

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