Hand-holdable contamination tester

Details Hand-holdable contamination tester Hand-holdable contamination tester

1980-10-23

1983-04-26

Punter, William H.

Optics: measuring and testing

By polarized light examination

Of surface reflection

356364, G01N 2121

Patent

active

043811515

ABSTRACT:
A hand-holdable apparatus for testing, and a method of testing, a light-reflective surface for contamination. The apparatus and the method are based upon a novel "off null" ellipsometry technique by the use of which contamination of the surface is ascertained, if the intensity of light reflected by the surface being tested exceeds a predetermined threshold of intensity.

REFERENCES:
patent: 1756785 (1930-04-01), Gallasch
patent: 2415436 (1947-02-01), Maris
patent: 3718399 (1973-02-01), Kalman
patent: 3721500 (1973-03-01), Fugitt
patent: 3874797 (1975-04-01), Kasai
Bockeris et al., "The Anodic Formation of Calomel Films on Mercury Electrodes-an Ellipsometric-Galvanostatic Study" Proc. Roy. Soc. (London) 1964, pp. 345-377.
Gottesfeld et al., "The Monitoring of Fast Changes in the Optical Properties of Electrode Surfaces with a Classical Ellipsometer", Surface Science, 44, 1974, pp. 377-388.
Smith, T. "NDT Techniques for the Prediction of Adhesive Failure Loci Prior to Bonding" Materials Evaluation, 33, 5-1975, pp. 101-106.
Sivertsen et al., "A Field Instrument for Water Vapour Measurements" Infrared Physics 15, & 5-1975, pp. 79-82.

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