G - Physics – 01 – N
Patent
G - Physics
01
N
G01N 21/47 (2006.01) G01N 15/00 (2006.01) G01N 15/02 (2006.01) G01N 21/51 (2006.01)
Patent
CA 2307509
The present invention relates to a backscattering apparatus and method for optical scanning along a circular path using one or more optical illuminators and receivers. More particularly, it relates to an apparatus and method of focusing one or more beams of light into one or more beam spots, scanning the common beam spot(s) across a circular path and receiving light backscattered from the beam spot(s) with one or more detectors. A rotationally mounted scanning optics having an optical axis parallel to but not coaxial with the axis of rotation is used to accomplish these functions. A motor may be operatively linked to the scanning optics to cause the same to rotate at a constant angular velocity whereby, with appropriate signal generating detector and signal processing electronics, the number and size of particles suspended in a fluid medium exposed to the beam spot(s) can be determined.
Fetherstonhaugh & Co.
Laser Sensor Technology Inc.
Mettler-Toledo Autochem Inc.
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