A portion of a first paraboloid collects and concentrates randomized light from a lamp into parallel beams directed to a portion of a second paraboloid which refocuses the light onto a homogenizer. The second end further includes a terminal end and has a reduced width configuration. Moreover, a corner portion between a cylindrical surface and the fixation hole becomes obtuse, and hence the die becomes less liable to deform and break. The plurality of selection circuits select any one of the data input to the plurality of computing units. The remaining clock gating circuits are configured to inhibit the clock signal from being provided to the flop circuits of their respectively coupled subsets.