The optical splitter ULTIMODE SP-16B evenly splits the optical signal (beam) into 16 paths. Its standard casing (115x140x18 mm) is suitable for installation in RACK patch panels. Thorlabs offers a wide range of optical beamsplitters. Our plate beamsplitters have a coated front surface that determines the beam splitting ratio while the back surface is wedged and AR coated in order to minimize ghosting and interference effects. a laser beam) into two (or sometimes more) beams, which may or may not have the same optical power (radiant flux). It is a crucial part of many optical experimental and measurement systems, such as interferometers, also finding widespread application in fibre optic telecommunications.