A method and device for reducing the thermal-mechanical motion of a defecting body is disclosed, in which the device includes a semiconductor injection laser used as both a light source and a dual-mirror optical cavity for precisely measuring the motion of the body. The thermally induced motion of the mechanical structure is quenched using a force-feedback technique, in which the information from the structural-motion detector is coupled to the forcing mechanism such that the motion of the deflecting structure is counteracted and thereby reduced.
Hammig; Mark D. (2301 Bonisteel 3501 Phoenix Lab University of Michigan Ann Arbor MI)
October 17, 2005
FEDERALLY SPONSORED RESEARCH
 This invention was made with government support under Contract Number DE-FG04-86NE37969, awarded by the U.S. Department of Energy to The Regents of The University of Michigan. The government has certain rights to the invention.