Optics: measuring and testing – Inspection of flaws or impurities – Surface condition
Reexamination Certificate
2005-04-19
2005-04-19
Rosenberger, Richard A. (Department: 2877)
Optics: measuring and testing
Inspection of flaws or impurities
Surface condition
C356S239700, C250S559410
Reexamination Certificate
active
06882414
ABSTRACT:
The system has a single pulse spectrum capability for sensing the presence of contamination on a surface to be interrogated. The system includes a narrow frequency bandwidth visible pulse and broadband infrared pulse that are directed to the surface. An output wavelength discriminator receives the reflected sum-frequency that is generated. The output wavelength discriminator is substantially non-transmissive at the frequencies of the visible pulse and the infrared pulse, but is substantially transmissive at the sum-frequency of the visible pulse and the infrared pulse. The output of the wavelength discriminator is a broadband output. A frequency disperser receives the output of the wavelength discriminator and provides a physical separation of output wavelengths of the broadband output. A multi-channel analyzer analyzes the intensity of the physically separated output wavelengths as a function of their physical positions. Thus, a wavelength dependent intensity measurement is provided that is indicative of the presence of contamination.
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Barth Vincent P.
Rosenberger Richard A.
Shimokaji & Associates P.C.
The Boeing Company
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