Fig. 1. (Color online) Measurement system of Thermos Elastic Optical Indicator Microscopy (TEOIM). The incident light is circularly polarized by a sheet polarizer and reflected from the surface of an optical indicator, where the optical indicator is consists of glass substrate coated by indium tin oxide (ITO) thin film. The reflected light propagates to the linear polarizer aligned at 0° and 45°, and the intensity of reflected light is measured by a CCD camera.
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