Lawrence Livermore National Security, LLC

University of California

Joseph Arthur Menapace

Andrew James Bayramian

Thomas G Parham

Bernardino M Penetrante

Philip Edward Miller

Kathleen Irene Schaffers

William A Molander

John E Peterson

Paul Richard Ehrmann

Michael A Nichols

A nonaqueous magnetorheological fluid includes a primarily organic carrier liquid and magnetizable particles. The magnetorheological fluid also includes a buffer, a stabilizer, and water. A pH of the magnetorheological fluid is between 6.5 and 9.0.

Method and system for polishing materials using a nonaqueous magnetorheological fluid

A method of finishing an optical element includes mounting the optical element in an optical mount having a plurality of fiducials overlapping with the optical element and obtaining a first metrology map for the optical element and the plurality of fiducials. The method also includes obtaining a second metrology map for the optical element without the plurality of fiducials, forming a difference map between the first metrology map and the second metrology map, and aligning the first metrology map and the second metrology map. The method further includes placing mathematical fiducials onto the second metrology map using the difference map to form a third metrology map and associating the third metrology map to the optical element. Moreover, the method includes mounting the optical element in the fixture in an MRF tool, positioning the optical element in the fixture; removing the plurality of fiducials, and finishing the optical element.

Method and system for processing optical elements using magnetorheological finishing

A method for reducing the density of sites on the surface of fused silica optics that are prone to the initiation of laser-induced damage, resulting in optics which have far fewer catastrophic defects, and are better capable of resisting optical deterioration upon exposure to a high-power laser beam.

Combined advanced finishing and UV laser conditioning process for producing damage resistant optics

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Livermore, CA, United States of America

Joseph Arthur Menapace