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Catadioptric zoom scattering collector

United States Patent

March 14, 2000
View the Complete Patent at the US Patent & Trademark Office
Y-12 National Security Complex - Visit the Technology Transfer Website
A back scattering collector, comprising: a first spherical reflective surface; a second spherical reflective surface having an annular form defining a central aperture; a refractive element, the first and second reflective surfaces and the refractive element being aligned along an optical axis; a light excitation source for illuminating a volume for analysis; the first and second reflective surfaces having respective diameters which reflect light rays back scattered from the volume at least three times between the first and second reflective surfaces, a last one of the at least three refections directing the light rays through the refractive element; and, a photo detector, the refractive element focusing the light reflected light rays onto the photo detector. The second reflective surface can be formed on the convex side of a plano-convex lens, the refractive element being formed by a central portion of the lens. The distance between the reflective surfaces is adjustable.
Bernacki; Bruce E. (Layton, UT), Miller, Jr.; Arthur C. (Knoxville, TN), Nuspliger; Robert J. (Oak Ridge, TN)
Lockheed Martin Energy Research Corp (Oak Ridge, TN), Lockheed Martin Energy Systems, Inc. (Oak Ridge, TN), Environmental Systems Corporation (Knoxville, TN)
08/ 932,403
September 17, 1997