Advancing multi-wavelength photoelasticity through single-exposure detection  

作　　者：Pengfei Zhu Suhas P.Veetil Xiaoliang He Zhilong Jiang Yan Kong Aihui Sun Shouyu Wang Cheng Liu 朱鹏飞;Suhas P.Veetil;何小亮;蒋志龙;孔艳;孙瑷蕙;王绶玙;刘诚(Computational Optics Laboratory,School of Science,Jiangnan University,Wuxi 214122,China;Department of Engineering Technology and Science,Higher Colleges of Technology,Dubai,United Arab Emirates;OptiX+Laboratory,School of Electronics and Information Engineering,Wuxi University,Wuxi 214105,China)

机构地区：[1]Computational Optics Laboratory,School of Science,Jiangnan University,Wuxi 214122,China [2]Department of Engineering Technology and Science,Higher Colleges of Technology,Dubai,United Arab Emirates [3]OptiX+Laboratory,School of Electronics and Information Engineering,Wuxi University,Wuxi 214105,China

出　　处：《Chinese Optics Letters》2024年第9期74-79,共6页中国光学快报（英文版）

基　　金：supported by the National Natural Science Foundation of China(Nos.62205126 and 62305133);the Wuxi Science and Technology Development Fund Project(No.K20221016);the Fundamental Research Funds for the Central Universities(No.JUSRP123028);the Project of the Ministry of Industry and Information Technology of the People’s Republic of China(No.TC220H05L).

摘　　要：In this paper,we present a method to expedite multi-wavelength photoelasticity for efficient stress analysis.By modulating two slightly different-wavelength illumination beams and simultaneously capturing dark-field and bright-field images,our approach acquires four essential polarized images.Spatial filtering of Fourier transforms streamlines inner stress computation,enabling multi-wavelength photoelasticity with a single detector exposure.Theoretical foundations are outlined,and proof-of-principle experiments validate the feasibility with a measurement error below 6.4%.The high measurement speed,determined by the detector’s frame rate,facilitates dynamic sample measurements at video frequency,offering promising advancements in material stress analysis.

关 键 词：PHOTOELASTICITY stress measurement structured illumination. 

分 类 号：TP391.41[自动化与计算机技术—计算机应用技术] O439[自动化与计算机技术—计算机科学与技术]