Method and apparatus for determining the degree of oxidation of

Details Method and apparatus for determining the degree of oxidation of Method and apparatus for determining the degree of oxidation of

1989-09-06

1990-09-18

Evans, F. L.

Optics: measuring and testing

By configuration comparison

With photosensitive film or plate

G01B 1102

Patent

active

049573705

ABSTRACT:
A method and apparatus determines the thickness of a copper oxide coating of an object by measuring the quantity of light reflected from the object in at least two wavelength zones, and then determining a value for a relationship between those quantities, for example, the ratio or difference of those quantities. The value is then compared to a predetermined, regular correspondence between such values and copper oxide thicknesses to determine the object's copper oxide thickness.

REFERENCES:
patent: 3017512 (1962-01-01), Wolbert
patent: 3737237 (1973-06-01), Zurasky
patent: 3960451 (1976-06-01), Wirz et al.
patent: 4095881 (1978-06-01), Maddox
patent: 4405989 (1983-09-01), Tsukada et al.
"Three Color Cases Interferometer", Edwards, IBM Technical Disclosure Bulletin, vol. 16, #2, 7/1973.
L. Mori et al., "An Absolute Method of Color Temperature Measurement", Acta Chromatica, vol. 1, No. 3, pp. 93-102 (Oct., 1984).
ASTM T29-78 Standard Specification for Dumet Wire for Glass-to-Metal Seal Applications (May, 1978).

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