Prisms are components with at least two polished plano surfaces separated by a wedge angle, they are essentially blocks of optical glass that are arranged to be at precisely controlled angles to each other. They can be used to deflect, deviate and rotate beams of light as well as dispersing their wavelengths. Optical prisms can be found in dual channel instruments, anamorphic systems, imaging systems or any other application where beam steering and/or image manipulation is needed. There are many types of prism, each having a particular geometry to achieve the reflections necessary to perform a specific imaging task. The most important to the prism is the angular specification of prism.