In certain embodiments, an optical device and a method of use is provided. The methods enable the preparation of intimate homogeneous dispersions of materials while offering the ability to control the size of one component within another. One of differential transistors receives an AC signal, while, the other of differential transistors receives an average voltage of the AC signal. The first transparent plate electrode is layered on part of a first main surface of the main surfaces of the transparent piezoelectric film. The aircraft signal definition is created using a text editor or custom application.