Patent ID: 9291542
Filing Date: 2016-03-22
CPC Classification: G01N

Claim Text:
1. A particle detecting device comprising: a light source that illuminates, with an excitation beam, a fluid that contains a plurality of particles; a fluorescence measuring instrument that measures, at at least two different wavelengths, fluorescence that is produced in a region that is illuminated by the excitation beam; a scattered light measuring instrument that measures scattered light that is produced in a region that is illuminated by the excitation beam; an interference status evaluating portion that evaluates whether the scattered light that is measured is producing constructive interference or producing destructive interference; and a particle counting portion that counts a plurality of particles depending on the measured interference of the measured light, and counts fluorescent particles that are subject to detection, from among the plurality of particles, based on a wavelength of fluorescent measured, wherein if the measured scattered light is producing constructive interference and no florescent light is measured, the particle counting portion evaluates that all of the plurality of particles is non-fluorescent particles.