An actuator and actuator control system is provided for use with a mirror-like surface and is used to remove foreign substances from the mirror-like surface. The actuator may be a piezoelectric device and the control system operates the device in a predetermined vibratory manner to remove the foreign...http://www.google.fr/patents/US5025187?utm_source=gb-gplus-shareBrevet US5025187 - Actuator and control system for cleaning of mirror-like objects
Actuator and control system for cleaning of mirror-like objects
