| 摘要 |
PROBLEM TO BE SOLVED: To provide a method which facilitates inspection of a component surface (28). SOLUTION: The method comprises positioning a surface of the component to be inspected (10) in an optical path (24) of at least one infrared radiation detector (26), heating the component surface using electromagnetic radiation to cause an increase in radiance from a defect (70) present at the component surface, and detecting temperature variations within the component surface using the at least one infrared radiation detector, so that the surface irradiance is measured at predetermined locations across the component surface. The method further comprises detecting cracks in the component by analyzing radiation transient response data received by the infrared radiation detector, and correlating the temperature variations to the radiation transient response data to determine a depth of the detected cracks. COPYRIGHT: (C)2005,JPO&NCIPI
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