Systems and methods are described herein that provide a mobile push notification system that sends notifications to various types of mobile devices using a single cloud based interface. At a point of access between a loop plant and Central Office, the filter is interposed in series over a telephone service line to provide spectral containment by restricting the frequencies of transmission passing along the line. The systems of the present invention are correlated with methods for biopsying a lesion and for surgically removing a lesion. Therefore, free vibration of the movable portion is rapidly damped so as not to adversely affect sensor output. The plurality of optical structures is disposed on the exit surface, each optical structure is dented from the exit surface to the interior of the transparent substrate and forms a refractive convex within the transparent substrate, and each refractive convex corresponds to one of the plurality of the light sources.