Polarized light has been used on photoelastic experiments, but the expression of polarized light is not clearly defined. And symbols and nomenclature in photoelasticity are also not determined. If the above problems will be clear, the developments of the new methods of the photoelastic analysis and mutual communications between researchers will be promoted easily and fast. We propose an expression method of polarizing light state using Stokes' parameter, and verify its expression by photoelastic photographs using transmitted and reflected equipments.
We find the most suitable symbols and nomenclature from the 95 papers of Proceedings of the Japan Society for Photoelasticity