Optics: measuring and testing – For size of particles
Patent
1991-12-18
1993-03-02
Rosenberger, Richard A.
Optics: measuring and testing
For size of particles
356338, 250574, 25022728, 385 12, G01N 2100, G02B 604
Patent
active
051913887
ABSTRACT:
Apparatus for detecting particulate matter in a slurry travelling in a flow channel, the apparatus including an optical taper containing a plurality of optical fibers fused together for viewing the particulate matter in only a thin layer of the slurry immediately adjacent to a first end of the optical fibers, the thin layer having a maximum depth equal to approximately the largest particle size of the particulate matter, the first ends of the optical fibers extending through a radial port in the flow channel and being immediately adjacent to the slurry travelling in the flow channel, the optical fibers having a focal length at the first ends thereof for permitting focussed viewing thereby only in the thin layer which is adjacent to the first ends, and the optical fibers being tapered from second opposite ends thereof to the first ends thereof to provide magnification of the image of the particulate matter at the second ends, a fiber optic bolt for securing the optical taper within the port such that the first ends of the optical fibers are in fluid communication with the slurry travelling in the flow channel, a light source for illuminating at least the thin layer of the slurry adjacent the first ends of the optical fibers, and a video camera for viewing an image of the particulate matter in the thin layer as viewed from opposite second ends of the optical fibers.
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Flow Vision, Inc.
Pham Hoa Q.
Rosenberger Richard A.
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