Shearographic imaging machine with archive memory for animation data and air handling system
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United States of America Patent
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Sep 14, 2004
Grant Date -
Nov 15, 2001
app pub date -
Jul 17, 2001
filing date -
Jun 16, 1999
priority date (Note) -
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status (Latency Note)
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Abstract
The invention relates to an apparatus for performing electronic shearography on a test object, especially a tire or retread tire. The apparatus uses a laser light source to illuminate the test object. An optical element through which electromagnetic radiation is reflected from the test object is transmitted and forms a random interference image. The random interference image can be electronically processed to provide a video animation of the effects of stress on the test object. An archive memory can be provided for retaining the animation data which can be compressed such that it includes only preselected individual shearogram images from the set of sequential shearogram images and less than all of the image data associated therewith. An air handling system can be provided for changing the ambient pressure in a pressure chamber within which the test object is supportable. The air handling system can include a humidity reducing mechanism.
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