Detecting strain in birefringent materials using spectral polarimetry
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United States of America Patent
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Dec 28, 2010
Grant Date -
Apr 24, 2008
app pub date -
Aug 31, 2007
filing date -
Aug 31, 2006
priority date (Note) -
Expired
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Abstract
A method, computer program product and system for analyzing multispectral images from a plurality of regions of birefringent material, such as a polymer film, using polarized light and a corresponding polar analyzer to identify differential strain in the birefringent material. For example, the birefringement material may be low-density polyethylene (LDPE), high-density polyethylene (HDPE), polypropylene, polyethylene terephthalate (PET), polyvinyl chloride (PVC), polyvinylidene chloride, polyester, nylon, or cellophane film. Optionally, the method includes generating a real-time quantitative strain map.
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