Balance Beam Interferometer
Original Publication Date: 1986-Jul-01
Included in the Prior Art Database: 2005-Mar-09
Interferometers generally utilize air bearings to obtain frictionless movement of a mirror. The interferometer 10 disclosed herein (Figs. 1-3) provides frictionless, controlled movement of the mirror by using a balance system. Specifically, the mirror 12, coil 14, connecting rods 16, draw plate 18 and link rod 20 assembly is counterbalanced by balance weight 22, as shown in Fig. 1. This balance system uses magnet 24 and coil 14 to move the mirror and coil. The mirror-coil assembly concentrically surrounds the magnet such that the longitudinal surface of the magnet is substantially equidistant from the inner surface of the coil, as shown in Fig. 2.