Steered Mirror
Jim Lipsey and He Zhu used the voice coil actuators of two loudspeakers to control two axes of motion of a mirror. A rod was attached to each loudspeaker cone and to a swivel attached to the mirror
(click photos to enlarge)
Steered Mirror |
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Jim Lipsey and He Zhu used the voice coil actuators of two loudspeakers to control two axes of motion of a mirror. A rod was attached to each loudspeaker cone and to a swivel attached to the mirror (click photos to enlarge) |
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A laser reflected off the mirror could be steered to create a pattern as directed by a computer |
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The motion of the voice coil was measured by an LED/photodiode pair, and a feedback control loop in the computer adjusted the current to the loudspeaker to acheive the desired displacement. |