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US 8,427,641 B2Granted
Compact detector for simultaneous particle size and fluorescence detection
AssigneeAzbil BioVigilant, Inc.
InventorsJohn Y. Babico, Chen Liang
Life of this patent
Estimating the term…
Abstract
A particle detection and classification system is disclosed. The system determines the size of measured particles by measuring light scattered by the particles. The system simultaneously determines whether measured particles are biological or non-biological by measuring fluorescent light from the particles. The system uses a parabolic reflector, and optionally, a spherical reflector to collect fluorescence light.
Claims20
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.
5 more elements
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;
- and
- 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;
- wherein, said light source supplies substantially collimated light defining a first axis.
5 more elements
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;
- a first cylindrical lens in optical communication with said first detector and a second cylindrical lens in optical communication with said second detector;
- 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;
- wherein, said sampling area is defined by a fluid line carrying a fluid, wherein said fluid line or said fluid has an index of refraction greater than 1.0;
- and wherein both cylindrical lenses are configured to correct astigmatism introduced by said fluid line.
6 more elements
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 defining a first axis;
- and
- wherein said light source, said sampling area, said first detector and said second detector are located along said first axis;
- and further comprising a scattered light collection lens located along said first axis on a second side of said sampling area between said sampling area and said first detector, and a fluorescent light condenser lens located along said first axis on a second side of said sampling area between said sampling area and said second detector, wherein said scattered light collection lens defines an aperture about said first axis, and wherein said fluorescent light collection lens is located within said aperture.
6 more elements
Dependencies are inferred from the claim text.