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AssigneesNational Institute of Advanced Industrial Science and Technology, Valqua, Ltd.
InventorsHiroyuki Niino, Yehan Qiao, Tomoaki Yoshiyama
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To provide an internal stress confirming method of a resin which is capable of measuring an internal stress of a translucent resin such as a fluororesin and a fluororubber and dynamically confirming stress propagation, and an apparatus measuring for the same. The internal stress confirming method for confirming an internal stress of a measurement target containing a translucent resin includes irradiating the measurement target with near-infrared light having a peak wavelength in a near-infrared band of 800 nm to 2500 nm through frosted glass, a polarizer, and a ¼ wavelength plate; acquiring a near-infrared image by imaging the measurement target through a ¼ wavelength plate and an analyzer; and confirming the internal stress of the measurement target based on the near-infrared image.
An internal stress confirming method for confirming an internal stress of a measurement target containing a translucent resin, comprising:
An internal stress measuring apparatus for confirming an internal stress of a measurement target containing a translucent resin, comprising:
Dependencies are inferred from the claim text.