Optical: systems and elements – Protection from moisture or foreign particle
Patent
1996-07-25
1998-03-03
Shafer, Ricky D.
Optical: systems and elements
Protection from moisture or foreign particle
310322, 310323, 310331, 310332, 310335, 310369, 15250003, G02B 508, B08B 702, B60S 102, H01L 4108
Patent
active
057241864
ABSTRACT:
A device for use in vehicular rear view mirrors which comprises a mirror and a vibrator so arranged to propagate pressure waves or vibrations in the mirror primarily perpendicular to the plane of the mirror. The vibrations are of sufficient magnitude as to cause water droplets to leave the surface of the mirror by atomization of the fine droplets or by the running together of droplets and subsequent dripping off by gravity. The bonds between the mirror face and other solid deposits including ice are quickly broken allowing the debris to fall clear, thus enhancing the clarity of vision of the mirror. The vibrators are ceramic piezoelectric transducers mounted in a Bi-Morph configuration directly on the back of the mirror.
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Rudolph John R.
Shafer Ricky D.
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