Radiant energy – Invisible radiant energy responsive electric signalling – Infrared responsive
Reexamination Certificate
2005-06-07
2005-06-07
Hannaher, Constantine (Department: 2878)
Radiant energy
Invisible radiant energy responsive electric signalling
Infrared responsive
Reexamination Certificate
active
06903339
ABSTRACT:
Amount of opaque coating on a substrate is determined. An infrared beam is transmitted into the opaque coating on the substrate. Infrared beams scattered by the opaque coating are collected and detected at a first wavelength and a second wavelength. Infrared energy Ic1and Ic2of the collected infrared beams at the first and second wavelengths, respectively, are compared with predetermined values of infrared energy Io1and Io2of collected infrared beams at the first and second wavelengths, respectively, that are scattered by a reference substrate without the opaque coating to determine absorbance values A1 and A2 for the opaque coating at the first and second wavelengths, respectively. Absorbance values A1 and A2 at the first and second wavelengths are given by equations A1=−log10(Ic1/Io1) and A2=−log10(Ic2/Io2). A difference A1−A2 is correlated to an opaque coating amount.
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LaRiviere Diane R.
Shelley Paul H.
Black Lowe & Graham PLLC
Hannaher Constantine
The Boeing Company
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