Electro-optical method and system for in situ measurements...

Details Electro-optical method and system for in situ measurements... Electro-optical method and system for in situ measurements...

G - Physics

01

N

73/59

G01N 21/00 (2006.01) G01N 21/53 (2006.01) G01N 1/22 (2006.01)

Patent

CA 1041318

ABSTRACT A system and method provides electro-optical in situ measurements of the mass per unit volume of particulate matter suspended in a fluid medium. A beam of electromagnetic radiation is directed through a portion of the medium and radiation back- scattered from an optically defined volume thereof is detected and utilized to provide an indication of the mass of the par- ticles per unit volume of the medium. The beam is preferably a periodically interrupted beam of substantially monochromatic light having a wavelength of the order of magnitude of the mean diameter of the respective particles of interest. In one em- bodiment, the d.c. component of the detection signal is filtered out to eliminate the effect of any background radiation.

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