Optics: measuring and testing – Velocity or velocity/height measuring – With light detector
Patent
1983-10-31
1986-03-25
Buczinski, S. C.
Optics: measuring and testing
Velocity or velocity/height measuring
With light detector
356434, 356436, 356440, 356442, G01P 336
Patent
active
045779635
ABSTRACT:
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.
REFERENCES:
patent: 3825346 (1974-07-01), Rizzo
patent: 3880526 (1975-04-01), Kobayashi et al.
patent: 4023909 (1977-05-01), Ross
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