Title:
METHOD FOR DETERMINING INTERNAL STRESS OF RESIN AND APPARATUS FOR MEASURING SAME
Document Type and Number:
WIPO Patent Application WO/2023/047902
Kind Code:
A1
Abstract:
[Problem] To provide: a method for determining the internal stress of a resin, which is capable of, for example, measuring the internal stress of a translucent resin such as fluororesin or fluororubber or dynamically determining the stress propagation; and an apparatus for measuring same. [Solution] The present invention provides a method for determining the internal stress of an object to be measured including a translucent resin, wherein the object to be measured is irradiated with near-infrared light having a peak wavelength in a near-infrared band of 800-2500 nm through frosted glass, a polarizer, and a quarter-wave plate and is photographed using a quarter-wave plate and an analyzer to acquire a near-infrared image, and the internal stress of the object to be measured is determined on the basis of the near-infrared image.
Inventors:
NIINO HIROYUKI (JP)
QIAO YEHAN (JP)
YOSHIYAMA TOMOAKI (JP)
QIAO YEHAN (JP)
YOSHIYAMA TOMOAKI (JP)
Application Number:
PCT/JP2022/032704
Publication Date:
March 30, 2023
Filing Date:
August 31, 2022
Export Citation:
Assignee:
AIST (JP)
VALQUA LTD (JP)
VALQUA LTD (JP)
International Classes:
G01L1/00; G01L1/24
Foreign References:
| JPS61253436A | 1986-11-11 | |||
| JP2007033223A | 2007-02-08 | |||
| JP2017125770A | 2017-07-20 |
Attorney, Agent or Firm:
SSINPAT PATENT FIRM (JP)
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