DYNAMIC LIGHT SCATTERING TYPE PARTICLE SIZE ANALYZER TO MINIMIZE A DISTORTION ERROR WHICH IS INEVITABLY ACCOMPANIED WITH HIGH-SPEED OPERATION

摘要

PURPOSE: A dynamic light scattering type particle size analyzer is provided to operate at high speed and high efficiency in order to measure the size distribution of nano particles which move fast.;CONSTITUTION: A dynamic light scattering type particle size analyzer includes a beam splitter, a first and a second multi pixel detector, a first and a second wave height selector, a correlator, and a granularity calculator. The beam splitter(10) branches off the scattered light which comes out when focusing a laser on a diffusion media including measurement particles into a first optical signal and a second optical signal. The first multi pixel detector(13a) converts the first optical signal to electric signal. The first wave height selector(14a) receives the electric signal from the first multi pixel detector, removes outputs the constant digital signal which removes the noises below the specific wave height, and outputs the noise-removed digital signal. The second multi pixel detector(13b) converts the second optical signal to electric signal. The second wave height selector(14b) receives the electric signal from the second multi pixel detector, removes outputs the constant digital signal which removes the noises below the specific wave height, and outputs the noise-removed digital signal. The correlator(15) receives the digital signals from the first and second wave height selectors through respective first and second channels, and produces a cross correlation function between the first and second channels. The granularity calculator computes the size of the particles based on the cross correlation function obtained by the correlator.;COPYRIGHT KIPO 2010