Optics: measuring and testing – By particle light scattering – With photocell detection
Patent
1979-01-02
1982-07-27
Corbin, John K.
Optics: measuring and testing
By particle light scattering
With photocell detection
250574, G01N 2153
Patent
active
043414710
ABSTRACT:
In an apparatus in which particles are passed through an optical sensing zone to measure their radiant energy distribution such as, for example, light scattering characteristics for the purpose of identifying the particles, means and a method are provided for deviating the collected light in accordance with predetermined different paths to a plurality of different photodetecting devices. The deviation is effected independently of collection by optical radiant energy transmitting or reflecting means. The different photodetecting devices enable the measurement of energy directed along the particular path which is identified with that device. The paths are established by the deviating means rather than permitted to evolve by the scattering phenomena themselves whereby the photodetecting devices can be located in convenient arrangements and may be conventional in construction. Different forms of the invention combine optical reflection or refraction for collecting the scattered radiant energy with optical reflection or refraction for deviation to achieve different advantages and results.
REFERENCES:
patent: 1607084 (1926-11-01), Kenney
patent: 3481039 (1969-12-01), Kautz
patent: 3508830 (1970-04-01), Hopkins et al.
patent: 3827798 (1974-08-01), Alvarez
patent: 4050782 (1977-09-01), Ucnida et al.
Brunsting Albert
Hogg Walter R.
Corbin John K.
Coulter Electronics Inc.
Koren Matthew W.
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