Multiple wavelength transmissometer

Details Multiple wavelength transmissometer Multiple wavelength transmissometer

1975-04-23

1977-01-04

La Roche, Eugene

Radiant energy

Photocells; circuits and apparatus

Optical or pre-photocell system

250565, 250573, 356102, 356104, 356207, G01N 2126, G01N 1502

Patent

active

040015955

ABSTRACT:
A broad band radiant energy beam is passed through a sample region that contains particulate matter. The emergent beam is applied to a plurality of photodetectors, each one of which is made responsive to a different narrow band portion of the beam. The thus obtained electrical signals are applied to a computer which is programmed to process the electrical signals and read out either the size distribution parameters or the mass concentration of the particles in the beam.

REFERENCES:
patent: 3690772 (1972-09-01), Endl
patent: 3696247 (1972-10-01), McIntosh et al.
patent: 3724951 (1973-04-01), Seelbinder
patent: 3750883 (1973-08-01), Irving et al.
patent: 3807876 (1974-04-01), Nakahara et al.
patent: 3820901 (1974-06-01), Kreuzer
patent: 3860818 (1975-01-01), Stalder et al.

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