As the user moves fluorescent shapes over the open end of The Geometron, a tiny camera captures their movements and displays them on a monitor at the core.
Unlike a regular kaleidoscope in which the three mirrors form a triangular prism, the mirrors in The Geometron form a truncated triangular pyramid, resulting in a polyhedral kaleidoscope. The replicated images are not coplanar (as in a regular kaleidoscope), but rather meet each other at an angle. In this version of the polyhedral kaleidoscope the angles are calculated to create a virtual disdyakis triacontahedron (aka hexakis icosahedron) consisting of 120 uniform triangles.
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