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Published on: September 8, 2011
Customized depolarization spatial patterns with dynamic retardance functions
David Marco1, Guadalupe López-Morales1, María Del Mar Sánchez-López2,3
1Instituto de Bioingeniería, Universidad Miguel Hernández de Elche, Avda. Universidad s/n, 03202, Elche, Spain.
Abstract:
In this work we demonstrate customized depolarization spatial patterns by imaging a dynamical time-dependent pixelated retarder. A proof-of-concept of the proposed method is presented, where a liquid-crystal spatial light modulator is used as a spatial retarder that emulates a controlled spatially variant depolarizing sample by addressing a time-dependent phase pattern. We apply an imaging Mueller polarimetric system based on a polarization camera to verify the effective depolarization effect. Experimental validation is provided by temporal integration on the detection system. The effective depolarizance results are fully described within a simple graphical approach which agrees with standard Mueller matrix decomposition methods. The potential of the method is discussed by means of three practical cases, which include non-reported depolarization spatial patterns, including exotic structures as a spirally shaped depolarization pattern.
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