How to Decide for Your Project Here are step you can follow: List your require beam count, layout, working distance, and wavelength. Compare spec sheet from several suppliers. Beam splitters are the unsung heroes of the optics world. These optical components divide incident light into two distinct beams: one reflected and one transmitted. Are you interested in learning about the benefits and differences of the multiple types of beamsplitters offered by Edmund Optics, including plate, cube, pellicle, and polka-dot. An Optical Beamsplitter is an optic or optical device that is used to split a beam of light in two. For many applications, that's enough.