HELIODONS   are used to simulate the lighting conditions at a specific latitude, time of year and time of day.   In this style the model is adjusted in relation to a fixed light source.

The most recent device was constructed for the CERES at Ball State University in Muncie, Indiana.  Improvements include machine engraved scales and a spring loaded split worm gear adjustment.

CLICK HERE   to see details of this device.  

I A D   performed the detail design,  machining,  finishing and assembly of the first two heliodons in collaboration with professor Chris Benton, UC Berkeley, and Paul LaBerge. The original one is at the Pacific Gas and Electric Co.'s  Pacific Energy Center in San Francisco, CA. and the second instrument is at the University of Hawaii.

CLICK HERE   to jump to the  Pacific Energy Center site for more information.