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Mirror with thermally controlled radius of curvature

United States Patent

7,740,362
June 22, 2010
View the Complete Patent at the US Patent & Trademark Office
Thomas Jefferson National Accelerator Facility - Visit the Technology Review Committee Website
A radius of curvature controlled mirror for controlling precisely the focal point of a laser beam or other light beam. The radius of curvature controlled mirror provides nearly spherical distortion of the mirror in response to differential expansion between the front and rear surfaces of the mirror. The radius of curvature controlled mirror compensates for changes in other optical components due to heating or other physical changes. The radius of curvature controlled mirror includes an arrangement for adjusting the temperature of the front surface and separately adjusting the temperature of the rear surface to control the radius of curvature. The temperature adjustment arrangements can include cooling channels within the mirror body or convection of a gas upon the surface of the mirror. A control system controls the differential expansion between the front and rear surfaces to achieve the desired radius of curvature.
Neil; George R. (Williamsburg, VA), Shinn; Michelle D. (Newport News, VA)
Jefferson Science Associates (Newport News, VA)
12/ 070,522
February 19, 2008
The United States of America may have certain rights to this invention under Management and Operating Contract No. DE-AC05-85ER 40150 from the Department of Energy.