Two ‘fog screen’ prototype displays have been developed at the City University of Hong Kong. Using projectors to show images, the researchers (Bin Chen, Yaozhun Huang and Miu-Ling) Lam used projection mapping techniques on to a non-planar, reconfigurable fog screen. This means that images can be displayed at multiple levels of depth. Touch interaction is also possible.
The first prototype uses a calibrated projector and fog-emitter modules, mounted on four linear motion platforms; these travel in the direction of the projector’s principle axis. The movement of each platform is synchronised with the image content.
The second unit uses a 2D array of fog emitters, which are individually switchable; this uses a switching patter controlled by a microcontroller and custom electronics. Columns of laminar fog form a non-planar screen, which scatters projected light projected.
Potential applications include CAD, architecture and telepresence. A video can be viewed at http://tinyurl.com/nv27nrg.
Perhaps the first step towards Tony Stark’s holographic workstation in Iron Man? Definitely take time to watch the video! (TA)