120201 Phase-Shifting Photoelastic Experiment Using Polarization High-Speed Camera

A semicircular polariscope which is constituted by a high-speed camera with a pixelated micro-polarization plate array and circular polarized light system (polarizer and quarter wave plate) is developed for applying to time-dependent photoelasticity. Four phase-shifted photoelastic fringe images are acquired simultaneously using the polariscope, and used to obtain two photoelastic parameters, namely, isochromatic parameter (fractional fringe order) and isoclinic parameter (isoclinic angle) using a phase-shifting technique. The polariscope is applied to investigate the ability of the camera using a circular disk subjected to a concentrated load. Results show that the polariscope is effective for determining the photoelastic parameters.