Abstract
Two simple formulas are introduced that allow for simultaneous determination of the phase retardances of two birefringent plates from a single pair of readings of the polarizer and the analyzer at extinction. These formulas are of great importance since they furnish the basis of a model for a simple, timesaving and accurate method for calibrating phase plates in the Senarmont compensator arrangement without requiring an exact λ/4 plate and with almost direct results. The Poincaré sphere representation of polarization states is used to illustrate the model.
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