The 77536 Trifurcated Fiber Optic Bundle is comb randomized to produce evenly divided outputs. When light is uniformly focused onto the large unified 0.56 NA input, each leg of a trifurcated bundle receives 27% of the total incident radiation (approximately 4% is reflected at the input and output and packing fraction is 0.9). Note: these bundles are sensitive to position changes. Changing the position of the common end or either leg will change the output beam distribution and power. Try to avoid movement of the bundle during a measurement.