Abstract: A pair of rigid connectors is disposed in frictional arrangement between an optical flat and its supporting cell joined by resilient connectors. The first, axial connector consists of a block anchored to the cell's inner surface and tilted by a spring so that a line contact is established between the block and the flat's peripheral surface. The second, radial connector consists of a flat clip overlapping the gap between the optical flat and the cell, so that surface contacts are established between the clip and the side surfaces of both structures. Another, retaining spring coupling the first and second connectors ensures that such surface contacts are maintained. The frictional forces resulting from these connections prevent the axial and radial movement of the flat with respect to the cell when either component is subjected to vibrations under normal operating conditions.

Abstract: A scanning phase-shifting mechanism comprising reference optics supported by three independent supporting members disposed in fixed triangular relation in a plane substantially normal to the optical axis of the instrument. Two upper members support all of the weight of the optics and provide a preferably horizontal, first axis of rotation for adjustment of the tip of the optics in relation to the optical axis of the instrument. The lower member does not support any of the weight of the optics, providing instead only longitudinal support to cause motion during translation. In addition, in conjunction with at least one of the upper members, the lower member provides a second axis of rotation, preferably orthogonal to the first axis, for adjustment of the tilt of the optics. Each supporting member is rigidly connected to a first end of a cantilevered flexure which is anchored at the other end to a stationary support structure housing the micromotion-translation mechanism of the phase-shifting interferometer.