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Apparatus and process for aqueous cleaning of diffraction gratings with minimization of cleaning chemicals

United States Patent Application

20080062522
A1
View the Complete Application at the US Patent & Trademark Office
Lawrence Livermore National Laboratory - Visit the Industrial Partnerships Office Website
An apparatus and method of cleaning a diffraction grating with minimal use of cleaning chemicals. The apparatus includes a processing vessel having a sump at a lower end thereof, and an inclined platform for receiving a diffraction grating within the processing vessel so that a top surface of the diffraction grating is in an inclined position. This enables fluid runoff from the top surface of the diffraction grating to drain into the sump where it is recirculated via a recirculation line which channels (using a pump) fluid from the sump to a recirculation spout positioned to direct fluid onto the top surface of the diffraction grating. Additionally, by measuring the amount of waste cleaning fluid (acid) collected, a neutralizing agent may be dispensed to neutralize any remaining cleaning fluid in the system so that waste fluid may be released without limitation.
Britten, Jerald A. (Clayton, CA), Hoaglan, Curly Ray (Livermore, CA), Nissen, James D. (Livermore, CA), Carlson, Thomas C. (Livermore, CA), Lue, David Van (Livermore, CA), Aasen, Michael D. (Livermore, CA)
The Regents of the University of California
11/ 900,325
September 10, 2007
I. FEDERALLY SPONSORED RESEARCH OR DEVELOPMENT [0002] The United States Government has rights in this invention pursuant to Contract No. W-7405-ENG-48 between the U.S. Department of Energy and the University of California for the operation of Lawrence Livermore National Laboratory.