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Programmable phase plate for tool modification in laser machining applications

United States Patent

April 6, 2004
View the Complete Patent at the US Patent & Trademark Office
Lawrence Livermore National Laboratory - Visit the Industrial Partnerships Office Website
A system for laser machining includes a laser source for propagating a laser beam toward a target location, and a spatial light modulator having individual controllable elements capable of modifying a phase profile of the laser beam to produce a corresponding irradiance pattern on the target location. The system also includes a controller operably connected to the spatial light modulator for controlling the individual controllable elements. By controlling the individual controllable elements, the phase profile of the laser beam may be modified into a desired phase profile so as to produce a corresponding desired irradiance pattern on the target location capable of performing a machining operation on the target location.
Thompson, Jr.; Charles A. (Livermore, CA), Kartz; Michael W. (Tracy, CA), Brase; James M. (Livermore, CA), Pennington; Deanna (Livermore, CA), Perry; Michael D. (Poway, CA)
The Regents of the University of California (Oakland, CA)
10/ 172,458
June 13, 2002
The United States Government has rights in this invention pursuant to Contract No. W-7405-ENG-48 between the United States Department of Energy and the University of California for the operation of Lawrence Livermore National Laboratory.