New formulas for phase retardance measurements of birefringent plates |
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| Authors: | N N Nagib |
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| Institution: | National Institute for Standards, Optical Metrology Department, P.O. Box 136, 12211 Giza, Egypt |
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| 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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| Keywords: | Phase retardance Birefringent plates Poincaré sphere Inexact compensators |
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