Patent ID: 6034769
Filing Date: 2000-03-07
Classification: G01N

Abstract:
A method for counting and measuring particles illuminated by a light beam and including the steps of:providing by a light detecting system an output which is effectively indicative of a size of said particles intersecting said light beam within a particle monitoring region of said light detecting system so that said particles are monitored within said particle monitoring region, and wherein a light, created by the intersection of said particles with said light beam, is proportional to said output;amplifying said output by an amplifying means;converting each amplified signal to a digital form pulse having an adequate duration with said output;forming the strobe pulse packs by strobing of the digital form pulses by strobe pulses of a strobe pulse sequence, and wherein each strobe pulse pack contains at least one strobe pulse of said strobe pulse sequence;counting a quantity of said strobe pulses within said each strobe pulse pack;selecting and sorting a plurality of strobe pulse packs by an identical quantity of said strobe pulses within said each strobe pulse pack of said plurality of strobe pulse packs;counting a quantity of the identical strobe pulse packs.