Apparatus to evaluate objectively the concentration and motility of particles suspended in a sample of liquid with data processor and display of the results

摘要

An apparatus to evaluate objectively the concentration and motility of particles suspended in a sample of liquid, and particularly to an apparatus to solve objectively the problem of evaluating these important characteristics in a very simple manner and in a short time by exploiting the Doppler effect. The sample to be examined is subjected to one of the two sub-beams resulting from the suitable division of a coherent monochromatic light beam emitted by a polarized LASER, while the other sub-beam is considered as a reference light sub-beam. Because of the very little difference between the frequencies of the original and scattered light a beat is originated in the rejoined two sub-beams which is dependent on the characteristics of the examined sample. Electromechanical means are provided to position automatically and sequentially a set of test-pieces to be examined according to a program and a data processor is provided to process the output signal of the rejoined sub-beams, so that the desired evaluations are displayed on a monitor or printed as alpha-numerical results and/or graphic diagrams. All of the mechanical, electromechanical, optical and data processor members are enclosed within a single box-container as component members of the apparatus.