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The complete polarization state generator (PSG), which consists of one rotatable polarizer and one variable retarder with a quarter-wave plate, is introduced. The orientation angle of its output polarization ellipse equals half of the retardance of the variable retarder, and the ellipticity angle corresponds to the polarizer azimuth. The PSG is employed in the quantitative orientation-independent differential polarization microscope, which uses polarized light states with the same ellipticity and different orientation angles. Image processing algorithms using three or four frames are described.

journal of the optical society of america. a, optics, image science, and vision./journal of the optical society of america. a, online

Complete polarization state generator with one variable retarder and its application for fast and sensitive measuring of two-dimensional birefringence distribution