Radiant energy – Invisible radiant energy responsive electric signalling – Ultraviolet light responsive means
Patent
1996-10-16
1998-02-10
Porta, David P.
Radiant energy
Invisible radiant energy responsive electric signalling
Ultraviolet light responsive means
2504611, G01B 1106, G01N 2133
Patent
active
057172161
ABSTRACT:
A method and apparatus for determining the thickness of an organic coating on a metal surface are disclosed. The surface of the metal is illuminated with ultraviolet light and the intensity of the reflected ultraviolet light is measured to determine the coating thickness.
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McCoy Bill N.
Sweet Jeffrey W.
Hanig Richard
McDonald Alan T.
Porta David P.
Reynolds Metals Company
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