Patent ID: 8899761

Claim:
A vibratory assembly comprising: a housing; a transducer assembly located about an end of the housing and having a substantially cylindrical shape; an isolator at least partially disposed between the housing and the transducer assembly; a lens cover operably coupled with the transducer assembly, the lens cover including an arcuate viewing pane and a generally planar rim circumscribing the arcuate viewing pane; a power source having contacts operably coupled with the transducer assembly, wherein the power source is configured to supply power to the transducer assembly at various frequencies swept around a resonance harmonic to vibrate the transducer assembly and consequently the lens cover through a range of frequencies to account for mass changes resulting from debris accumulation on the lens cover; and an anti-reflectance coating disposed on a forward face of the lens cover, wherein the anti-reflectance coating is at least partially conductive such that a current can be passed through the coating to heat the forward face of the lens cover.