Catadioptric zoom scattering collector
Number of patents in Portfolio can not be more than 2000
United States of America Patent
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Mar 14, 2000
Grant Date -
N/A
app pub date -
Sep 17, 1997
filing date -
Sep 17, 1997
priority date (Note) -
Expired
status (Latency Note)
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Abstract
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.
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