3D laser tracking on passive sphere
Playing the xylophone
The tracking unit traced a reflecting sphere and measured the distance interferometrically. The sphere was mounted on a stick to use it as a xylophone mallet.
By hitting a passive xylophone – simply painted on a leather pad – the measured acceleration of the sphere triggered playing a sound. The position of the tracking at that time determined the sound frequency, which was “calibrated” before.
Tracking a robot
And of course, a robot most certainly shouldn’t be missing either! On its arm, a sphere was mounted to track its movements and determine the position with interferometric accuracy.