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Subsurface Defect Localization by Structured Heating Using Laser Projected Photothermal Thermography
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Subsurface Defect Localization by Structured Heating Using Laser Projected Photothermal Thermography
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May 15, 2017
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This method aims at locating vertical subsurface defects. Here, we couple a laser with a spatial light modulator and trigger its video input to heat a sample surface deterministically with two anti-phased modulated lines while acquiring highly resolved thermal images. The defect position is retrieved from evaluating thermal wave interference minima.
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Thiel, E., Ziegler, M. Subsurface Defect Localization by Structured Heating Using Laser Projected Photothermal Thermography. J. Vis. Exp. (123), e55733, doi:10.3791/55733 (2017).
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