Action of the TNLCD over an input circularly polarized light on the Poincaré sphere. and represent, respectively, right-handed and left-handed circularly polarized states. The angles and are the spherical coordinates (longitude and latitude) of the output polarization state.
Experimental setup for equivalent parameter measurement. is the polarizer; , the quarter-wave plate used to generate circularly polarized light; LCD, the sample display; , the quarter-wave plate required to measure ; , the analyzer; and , the orientation of the input molecular director with respect to the laboratory horizontal axis.
Experimental results for the Stokes parameters , , and of the light transmitted by the TNLCD illuminated with right-handed circularly polarized light.
Transmitted intensity through the TNLCD inserted between an input polarizer and an output analyzer as a function of the analyzer angle for the addressed gray level . Measured values of the transmitted intensity are represented with dots and the nonlinear fit with solid line.
Representation of measured equivalent parameters and as a function of the addressed gray level .
Experimental setup for generating a set of EAPSs. is the polarizer; LCD, the sample display; QWP, the quarter-wave plate; and and are, respectively, the polarizer and quarter-wave plate axis angles with respect to the input molecular director of the LCD.
Representation of the final polarization states on the plane for the configuration that provides a set of EAPSs. The solid line is the least-square fit.
Representation on the Poincaré sphere of the output polarization states in the configuration that provides a set of EAPSs.
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