Method and apparatus for simultaneous optical measurement of par

Details Method and apparatus for simultaneous optical measurement of par Method and apparatus for simultaneous optical measurement of par

1976-06-14

1977-07-26

Rolinec, Rudolph V.

Radiant energy

Photocells; circuits and apparatus

Optical or pre-photocell system

250574, 250539, 356 73, 356152, G01N 2126

Patent

active

040385566

ABSTRACT:
A method and apparatus for simultaneous optical measurement of several characteristics of each particle of a group of small particles while the particles are suspended in a liquid. The apparatus includes a sample passage structure through which the particles pass, and a first optical detector structure which receives light from the sample passage structure. The sample passage structure and detector are aligned one with respect to the other. The output of a source of light is directed to the sample passage structure by an alignment device which aligns the light and the sample passage structure. A second optical detector receives the light passed by the sample passage structure. The second detector includes a converging lens and a photodetector so positioned with respect to one another that the light pattern at the detector due to the passage of a particle through the sample passage structure will maintain a substantially constant intensity notwithstanding movement of the sample passage structure, particle or the light.

REFERENCES:
patent: 3535539 (1970-10-01), Malespina et al.
patent: 3710933 (1973-01-01), Fulwyler et al.
patent: 3824462 (1974-07-01), Mullaney et al.
patent: 3918812 (1975-11-01), Holm
patent: 3938895 (1976-02-01), Bridger et al.

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