By adding a wedge and with partial reflective coating on first reflective surface,Penta Prism can be used as Beam splitter. We supply Beam splitter Penta Prism with standard Transmission/reflection (T/R) ratio of 20/80, 50/50. Other T/R ratio is available upon request. Specification Remain Same as Penta Prism only You have to specify T/R Ratio while ordering with Sizes