Optics: measuring and testing – By particle light scattering
Reexamination Certificate
2004-08-20
2009-08-18
Stafira, Michael P (Department: 2886)
Optics: measuring and testing
By particle light scattering
C356S338000
Reexamination Certificate
active
07576857
ABSTRACT:
A liquid particle counter for optically detecting an unconstrained particle suspended in a flowing liquid includes a sample chamber having a liquid inlet and a liquid outlet; a laser diode module producing a symmetrically collimated laser beam; a beam shaping optical system directing the laser beam at the sample chamber; and an optical detector located to detect light scattered by the particle in the sample chamber, the detector producing an electric signal characteristic of a parameter of the particle. The laser beam has an energy of a watt or more and passed through an aperture in a black glass aperture element in the sample chamber. The black glass aperture element removes diffracted and stray light from the beam without damage to the sample chamber.
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Greenlee Winner and Sullivan P.C.
Particle Measuring Systems, Inc.
Stafira Michael P
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