Papers
	CHI 99 Conference on Human Factors in Computing Systems Pittsburgh, Pennsylvania USA 15-20 May 1999 1999 AC 38.5kb Illuminating Light: A Casual Optics Workbench John Underkoffler and Hiroshi Ishii Tangible Media Group MIT Media Laboratory 20 Ames Street, Cambridge, MA 02139 USA {jh, ishii}@media.mit.edu ABSTRACT We describe a novel system for rapid prototyping of laser-based optical and holographic layouts. Users of this experimental direct manipulation tool called Illuminating Light move physical representations of various optical elements about a workspace; the system tracks these components and projects back onto the workspace surface the simulated propagation of laser light through the evolving layout. This application is built atop the Luminous Room infrastructure, an aggregate of interlinked, computer-controlled projector-camera units called I/O Bulbs.