DETECTING HEAT CAPACITY CHANGES DUE TO SURFACE INCONSISTENCIES USING HIGH ABSORBANCE SPECTRAL REGIONS IN THE MID-IR
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United States of America Patent
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Jun 6, 2013
app pub date -
May 4, 2011
filing date -
May 4, 2010
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Abstract
Methods and systems for detecting the presence of an inconsistency in or on a surface are generally provided. The method can include directing a modulated light beam (e.g., having a wavelength of about 3 μm to about 20 μm) from a light source to a mirror. The mirror then directs a reflected light beam onto the surface (e.g., directly onto the surface or indirectly onto the surface via a additional mirror(s)). The mirror is controlled to scan the reflected light beam across the surface. A specular reflection from the surface can then be detected in each light cycle, and the presence of the inconsistency on the surface can be detected.
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