抄録
This study deals with white light photoelasticity achieved using a combination of triphosphor fluorescent and mercury lamps and a tricolor filter, to reduce the attenuation of light intensities of isochromatics obtained from photoelastic experiments, and the multiplication and extraction of isochromatics. The proposed method requires the use of only a tricolor filter in addition to a circular polariscope, a color CCD camera, triphosphor fluorescent and mercury lamps and an image processor that are used in conventional white light photoelasticity. The method was applied to isochromatics obtained in an epoxy resin plate under four-point bending, and light intensities of the isochromatics were investigated. Then the isochromatics were multiplied and extracted using a technique developed by one of the authors. The results showed that a combination of the triphosphor fluorescent and mercury lamps and the tricolor filter improved the attenuation of light intensities of isochromatics, and increased the maximum fringe order of isochromatics which can be multiplied and extracted.
