CPC G01N 25/72 (2013.01) [G01N 21/63 (2013.01); G01N 21/71 (2013.01); G01N 21/84 (2013.01); G01N 21/88 (2013.01); G01N 21/8851 (2013.01)] | 11 Claims |
1. A method for laser stimulated lock-in thermography (LLT) crack detection in a system capable of switching between a plurality of LLT configurations on a sample, wherein the plurality of LLT configurations comprise a plurality of spot LLT laser beam focus configurations and at least one line LLT laser beam focus configuration, the method comprising:
using a first one of the plurality of LLT configurations for coarse scanning of the sample to detect a crack, hole or scratch on the sample; and
when a crack, hole or scratch is detected on the sample, switching to a second one of the plurality of LLT configurations for fine scanning of the crack, hole or scratch on the sample to determine one or more parameters of the crack, hole or scratch on the sample, wherein the first one of the plurality of LLT configurations comprises one of the at least one line LLT laser beam focus configurations.
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