Patent ID: 9250544
Filing Date: 2016-02-02
CPC Classification: G01N,G03F

Claim Text:
1. A particle counter, comprising: a housing having an inlet, an outlet, and a window, the inlet and the outlet configured to transport a fluid through the housing, the window disposed between the inlet and the outlet; a plurality of light sources provided outside the housing, the plurality of light sources configured to provide lights with different wavelengths; sensors provided outside the housing, the sensors configured to detect fractions of the lights scattered by a bubble or a particle in the fluid; and a control part configured to monitor intensities of the fractions of the lights detected by the sensors and to analyze a difference in intensities of the fractions of the lights scattered by the bubble or the particle in the fluid, the control part configured to distinguish between the particle and the bubble, the particle having a varying refractive index, and the bubble having a constant refractive index.