Method and a device for photothermally testing workpieces
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United States of America Patent
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Jun 2, 1998
Grant Date -
N/A
app pub date -
Jul 2, 1996
filing date -
Feb 21, 1996
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A method for photothermally testing workpieces, which includes the steps of directing an electromagnetic excitation beam to a desired measuring point on the workpiece surface, detecting and evaluating the heat in the form of thermal radiation which is generated by the excitation beam at the measuring point with the aid of a measuring head; directing two visible locating beams to the workpiece surface, the two locating beams intersecting at a point of intersection; and correcting the relative position between the workpiece and the measuring head so that the point of intersection and the desired measuring point coincide on the workpiece surface.
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