Automatic identification of suspended particles
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United States of America Patent
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May 15, 2007
Grant Date -
May 26, 2005
app pub date -
Nov 18, 2004
filing date -
Nov 21, 2003
priority date (Note) -
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Abstract
The present invention relates to the automatic analysis and identification of different species of particles in a liquid sample using both fluorescent tagging and magnification techniques. A light source at a first wavelength is used to induce the tagged particles to emit light at a second wavelength, while the image thereof is captured on a pixel array of a digital camera. A second camera can be used to capture an image of the particles illuminated at the first wavelength, which is separated from the second wavelength by an optical filter. Alternatively, a second light source emitting pulses of light at the second wavelength, which alternate with the first light source.
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