Particle detecting and differentiating device and method
AssigneeAzbil Corporation
InventorSeiichiro Kinugasa
Life of this patent
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Abstract
A particle detecting device includes: a light source that illuminates, with an excitation beam, a fluid that contains a plurality of particles; a fluorescence measuring instrument that measures 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.
Claims18
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 fluorescent light 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;
- and
- processing circuitry that evaluates whether the scattered light that is measured is producing constructive interference or producing destructive interference, and
- counts a plurality of particles depending on the measured interference of the measured light,
- wherein when the measured scattered light produces constructive interference and lengths of times over which the scattered light and the fluorescent light are measured are different, the processing circuitry evaluates that some of the plurality of particles are fluorescent particles.
A particle detecting method, comprising:
- illuminating, by a light source with an excitation beam, a fluid that contains a plurality of particles;
- measuring, by a fluorescence measuring instrument, fluorescent light that is produced in a region that is illuminated by the excitation beam;
- measuring, by a scattered light measuring instrument, scattered light that is produced in a region that is illuminated by the excitation beam;
- evaluating whether the scattered light that is measured is producing constructive interference or producing destructive interference;
- and
- counting a plurality of particles depending on the measured interference of the measured light,
- wherein when the measured scattered light produces constructive interference and lengths of times over which the scattered light and the fluorescent light are measured are different, there is an evaluation that some of the plurality of particles are fluorescent particles.
Dependencies are inferred from the claim text.