222 ジョーンズマトリクス画像フーリエ偏光解析法による重ね合わせ応力評価(OS6-5 光弾性法II)(OS6 実験力学の新展開)  [in Japanese] 222 Stress Evaluation in Superposed Plane Layers using Jones Matrix Image Fourier Polarimeter Technique  [in Japanese]

The aim of this study is to construct Jones Matrix Image Fourier Polarimeter for measuring internal stress state of 3-D object. By introducing various methods such as phase shifting and phase unwrapping techniques, this system have been proved to be a possibly available method to measure three optical parameters σ, θ, and ε in 2-D analysis. However, in the case of a 3-D analysis, we have various problems because the rotation of principal axis along light path affects these optical parameters seriously. In this paper, the authors prepare 3-D slice model consist of two thin glass disks and analyze three optical parameters influenced by the rotation of principal axis. As the results, in 3-D analysis, we found that phase difference σ can be treated as integrated value, on the other hand, azimuth angle θ can be treated as average value. And furthermore, ellipticity angle ε increased suddenly in superposed analysis.