A waterproof connector connects to a cable, and includes a housing where a terminal connected to an end of the cable is inserted and attached, a waterproof tube attached across the periphery of the housing and a periphery of the cable and a fastening cover capable of split fastening from a peripheral side of the waterproof tube. The fluid control valve assembly includes a valve and an electromagnetic actuator having an armature and a pole piece. The base plate includes a plurality of orientation slots and the actuation plate includes a plurality of actuation slots with each one of the actuation slots partially overlapping one of the orientation slots. The diffraction grating can have alternative shapes such as binary, trapezoidal, sinusoidal, parabolic, triangular and Gaussian. In addition, the couplings between the bracket and deck and the bracket and truck are releasable to enable interchanging of components.