Optics: measuring and testing – By particle light scattering – With photocell detection
Patent
1986-12-05
1989-02-14
Rosenberger, Richard A.
Optics: measuring and testing
By particle light scattering
With photocell detection
356 28, G01N 1300, G01N 1104, G01N 2141, G01N 2147
Patent
active
048042684
ABSTRACT:
A method of measuring the interaction of a fluid with a wall bounding the fluid which method includes placing tracer particles in the fluid, illuminating the particles, and measuring the movement of the particles by means of scattered light, the improvement wherein the step of illuminating comprises illuminating a region of the fluid adjacent the wall at a distance of less than about 1 micron from the wall with a light beam directed towards the interface of the fluid and the wall so that the light beam is completely reflected; and the step of measuring comprises recording the scattered light images resulting from the motion of the tracer particles in the region and evaluating the motion of the fluid adjacent the wall. The invention also describes an apparatus for practicing the novel method.
REFERENCES:
patent: 3975084 (1976-08-01), Block
patent: 4385830 (1983-05-01), Webb et al.
patent: 4608344 (1986-08-01), Carter et al.
patent: 4664513 (1987-05-01), Webb et al.
Wilks, Paul, "Internal Reflection Spectroscopy", International Laboratory (Jul./Aug. 1980).
Mohnsen Helmut M.
Reuter Benno
Schauerte Wulfram
Gesellschaft fur Strahlen-und Umweltforschung mbH
Rosenberger Richard A.
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