Optical determination of amount of soot in oil sample

Details Optical determination of amount of soot in oil sample Optical determination of amount of soot in oil sample

1992-03-05

1994-05-03

Rosenberger, Richard A.

Optics: measuring and testing

Oil testing

356246, 356436, 356440, G01N 2103, G01N 2159

Patent

active

053092139

ABSTRACT:
Method and apparatus for determining the concentration of optically attenuating materials in fluids, such as soot in diesel engine lubricating oils. An optical cell is employed in the form of a very thin tapered sample volume which is inserted into a light beam. The attenuation of the beam is measured at a plurality of locations along the varying thickness of the sample.

REFERENCES:
patent: 1940772 (1933-12-01), Schoenberg
patent: 3829217 (1974-08-01), Johnson et al.
patent: 4938602 (1990-07-01), May et al.
Robertson et al. "Lambert Absorption Coefficients of Water in the Infrared" Journal of the Optical Society of America vol. 61, No. 10 (Oct. 1971) pp. 1316-1320.
Tyler et al. "Thin-wedge-shaped cell for highly absorbent liquids" Applied Optics, vol. 17, No. 6 (Mar. 15, 1978) pp. 960-963.

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