Devices and techniques for generating and analyzing states of polarization in light using multiple adjustable polarization rotators in various applications. This tilt control mechanism includes a tension adjustment assembly having a cam wedge which supports the legs of a pair of coil springs and a cooperating drive block assembly which cooperates with the cam wedge to drive the cam wedge upwardly and downwardly to vary the tilt tension. The engine mounting assembly including an engine block fastened at its bottom to an engine mounting structure, and the connecting member being connected between the engine block and the engine mounting structure.