Water-drop-repellent mirror including a vibration plate and heat

Details Water-drop-repellent mirror including a vibration plate and heat Water-drop-repellent mirror including a vibration plate and heat

1990-03-22

1992-10-13

Henry, Jon W.

Optical: systems and elements

Protection from moisture or foreign particle

Humidity or temperature control

359507, 219219, B60R 106, G02B 7182, H05B 384

Patent

active

051556251

ABSTRACT:
A waterdrop repellent mirror provide a vibration plate which piezoelectric oscillator is affixed on the back side of the mirror, and a heater is placed therein to heat up the mirror surface. The piezoelectric oscillator on the rear surface of the mirror give ultra sonic wave vibration to the mirror through the vibration plate. When mirror surface resonate by inputting the vibration of the oscillator to the mirror, any waterdrop sticked on the mirror surface are dispersed. Re-sticked fine mist of waterdrop or frozen frost on the mirror surface can be removed by heated up the mirror, thereby clear mirror surface can be secured.

REFERENCES:
patent: 2722160 (1955-11-01), Prutzman
patent: 3686473 (1972-08-01), Shirn et al.
patent: 4715698 (1987-12-01), Haba
patent: 4833373 (1989-05-01), Doi et al.
patent: 4929072 (1980-05-01), Fujie et al.

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