Apparatus for measuring characteristics of particles in fluid by detecting light scattered at the particles
First Claim
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1. A particle measurement apparatus comprising:
- means for generating laser lights having wavelengths which are different from each other;
a flow cell through which a fluid sample including particles flows;
focusing means for collecting said laser lights and for irradiating said fluid sample therewith;
monochrometer means for wavelength-separating scattered light from said particles;
a plurality of detector means for detecting the wavelength-separated scattered light from said monochrometer means; and
measuring means for extracting output pulse signals of said plurality of detector means which are indicative of said particles and which are coincident with each other in timing of detection so as to enable measurement of the number, size and refractive index of said particles by use of said extracted output pulse signals of said plurality of detector means.
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Abstract
In a particle measuring apparatus for measuring characteristics of particles by detecting light scattered at the particles while irradiating the particles in fluid with light, the scattered light is detected by means of a plurality of detectors and the characteristics of particles are determined by using pulse signals of detection signals coming from the plurality of detectors, which are coincident with each other.
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Citations
5 Claims
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1. A particle measurement apparatus comprising:
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means for generating laser lights having wavelengths which are different from each other; a flow cell through which a fluid sample including particles flows; focusing means for collecting said laser lights and for irradiating said fluid sample therewith; monochrometer means for wavelength-separating scattered light from said particles; a plurality of detector means for detecting the wavelength-separated scattered light from said monochrometer means; and measuring means for extracting output pulse signals of said plurality of detector means which are indicative of said particles and which are coincident with each other in timing of detection so as to enable measurement of the number, size and refractive index of said particles by use of said extracted output pulse signals of said plurality of detector means. - View Dependent Claims (2, 3)
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4. A particle measurement apparatus comprising:
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means for generating laser lights having wavelengths which are different from each other; a flow cell through which a fluid sample including particles flows; focusing means for collected said laser lights and for irradiating said fluid sample therewith; a plurality of monochrometer means each of which wavelength-separates scattered light from said particles; a plurality of polarization dividing means associated with said plurality of monochrometer means for receiving the wavelength separated scattered light from the associated monochrometer means so that said plurality of polarization dividing means divides the received wavelength-separated scattered light into different polarized components; a plurality of detector means for detecting the different polarized components from said plurality of polarization dividing means; and measuring means for extracting output pulse signals of said plurality of detector means which are indicative of said particles and which are coincident with each other in timing of detection so as to enable measurement of characteristics of said particles. - View Dependent Claims (5)
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Specification