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System and method for laser-based, non-evaporative repair of damage sites in the surfaces of fused silica optics

United States Patent

September 6, 2016
View the Complete Patent at the US Patent & Trademark Office
Lawrence Livermore National Laboratory - Visit the Industrial Partnerships Office Website
A method for repairing a damage site on a surface of an optical material is disclosed. The method may involve focusing an Infrared (IR) laser beam having a predetermined wavelength, with a predetermined beam power, to a predetermined full width ("F/W") 1/e.sup.2 diameter spot on the damage site. The focused IR laser beam is maintained on the damage site for a predetermined exposure period corresponding to a predetermined acceptable level of downstream intensification. The focused IR laser beam heats the damage site to a predetermined peak temperature, which melts and reflows material at the damage site of the optical material to create a mitigated site.
Adams; John J. (Livermore, CA), Bolourchi; Masoud (Livermore, CA), Bude; Jeffrey D. (Danville, CA), Guss; Gabriel M. (Manteca, CA), Jarboe; Jeffery A. (Livermore, CA), Matthews; Manyalibo J. (Livermore, CA), Nostrand; Michael C. (Livermore, CA), Wegner; Paul J. (Livermore, CA)
Lawrence Livermore National Security, LLC (Livermore, CA)
13/ 707,053
December 6, 2012
STATEMENT OF GOVERNMENT RIGHTS The United States Government has rights in this invention pursuant to Contract No. DE-AC52-07NA27344 between the U.S. Department of Energy and Lawrence Livermore National Security, LLC, for the operation of Lawrence Livermore National Laboratory.