Optical: systems and elements – Mirror – Plural mirrors or reflecting surfaces
Patent
1997-09-17
2000-03-14
Nguyen, Thong
Optical: systems and elements
Mirror
Plural mirrors or reflecting surfaces
359366, 359425, G02B 510, G02B 1700
Patent
active
06036324&
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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Bernacki Bruce E.
Miller, Jr. Arthur C.
Nuspliger Robert J.
Environmental Systems Corporation
Lockheed Martin Energy Research Corp
Lockheed Martin Energy Systems, Inc.
Nguyen Thong
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