Patent ID: 8427641
Filing Date: 2013-04-23
Classification: G01J,G01N

Abstract:
1. A particle detection and classification system comprising: a sampling area including a fluid to be measured; a light source on a first side of said sampling area; a first detector on a second side of said sampling area; a second detector on a second side of said sampling area; a parabolic reflector having a vertex located on the first side of said sampling area and a focal point within said sampling area; wherein, said light source supplies substantially collimated light to said sampling area along a first axis, said first detector measures light scattered in the direction of the second side of said sampling area at predetermined angles, said parabolic reflector collects light emitted by illuminated particles within the sampling area by fluorescence and directs said collected light in a substantially collimated fashion in the direction of the second side of second sampling area, and said second detector measures fluorescence light collected by said parabolic reflector; and wherein said system further comprises a spherical reflector on a second side of said sampling area, wherein said spherical reflector has a center of curvature co-incident with said focal point of said parabolic reflector.