HARMONOGRAPH

A Harmonograph is a device made up of two pendulums, usually with a pen that is attached to one pendulum tracing a line on paper mounted on the other pendulum. A Harmongram is the resulting drawing. There are many methods of arranging the pendulums, one of which is in the form of a double compound pendulum. In the stereoscopic photograph below, the pen was replaced by a little flashlight and the paper by a stereoscopic camera that captured the light path. To learn more about stereoscopic photography and viewing stereo pictures refer to the section on Stereoscopic Photography.

Stereoscopic Harmonogram

Setup for making 3D Harmonograms