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Browse Prior Art Database

Balance Beam Interferometer

IP.com Disclosure Number: IPCOM000061207D
Original Publication Date: 1986-Jul-01
Included in the Prior Art Database: 2005-Mar-09
Document File: 2 page(s) / 48K

Publishing Venue

IBM

Related People

Ciancanelli, JM: AUTHOR

Abstract

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.

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Balance Beam Interferometer

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. When the coil is energized, the magnetic field provides the electromagnetic force to move the mirror-coil assembly so that the mirror can be properly positioned with respect to beam splitter 28, as shown in Fig. 3. The mirror-coil assembly is moveable without frictional contact with another component of interferometer 10, i.e., the cover 26 and magnet 24.

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