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Cleaning Verification Monitor Technique Based on Infrared Optical Methods

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Final rept.

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This is the final report in the development of two real-time non-contacting monitors for cleaning verification based on infrared optical methods. New analytical capabilities are required to maximize the efficiency of cleaning operations at DOD facilities, thus reducing waste streams generated while improving the quality of subsequent processes and the long-term reliability of repaired or refurbished parts. These methods will also be of great use for similar activities in DOE and commercial sector applications. During the course of the project we developed, built, and transitioned into the commercial sector a portable grazing-angle reflectance Fourier transform infrared FTIR spectrometer. We also developed a prototype for a tunable infrared-laser imaging instrument. Both can be applied on-line as real-time methods for the detection of contaminant residues common to DOD components. While both methods rely on the technique of infrared reflection spectroscopy for the detection of residues, each offers unique capabilities that can be used in either independent or complementary modes of operation. Three field tests of the prototype FTIR instrument were performed, two at Hill Air Force Base, Ogden, Utah and one at North Island. Following completion of the modifications suggested during the first and second field tests, a final field test was conducted at Hill AFB in March 2002. The current version of the prototype is commercially available and at least three units sold to Boeing Corporation, NASA, and Oak Ridge National Laboratory. Construction of the laser prototype continued to an intermediate point. A portable version of the spectrometer was constructed, but personnel, equipment, and funding limitations prevented development of a truly man portable version of the spectrometer and a transition of the prototype to commercialization.

Subject Categories:

  • Lasers and Masers
  • Atomic and Molecular Physics and Spectroscopy
  • Optics

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