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Design of polarimeters based on liquid crystals and biaxial crystals for polarization metrology

机译：基于液晶和双轴晶体的偏振计的偏振计设计

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This paper reviews three polarimeters based on different types of liquid crystal cells (parallel and twisted nematic, and ferroelectric), as well as a polarimeter based on the conical refraction phenomenon (occurring in biaxial crystals). A comparative analysis between them is included in order to summarize their main features and to point out their strengths and limitations. Then, the best candidate for imaging polarimetry is selected and implemented. Several polarization images are analyzed in order to show the potential of the instrument. Moreover, a new experimental configuration is presented, which combines an imaging polarimeter and a module used to achieve sub-pixelresolution in a system where the resolution is limited by detector pixel size. Experimental results show an improvement in the spatial resolution of polarization images by a factor of 1.4.
机译：本文回顾了基于不同类型液晶单元（平行和扭曲向列，铁电体）的三种偏振计，以及基于圆锥折射现象的偏振计（在双轴晶体中发生）。为了总结它们的主要特征并指出它们的优势和局限性，对它们之间进行了比较分析。然后，选择并实施最佳的成像偏振仪。分析了几个极化图像，以显示仪器的潜力。此外，提出了一种新的实验配置，该配置结合了成像偏振计和用于在分辨率受检测器像素大小限制的系统中实现亚像素分辨率的模块。实验结果表明，偏振图像的空间分辨率提高了1.4倍。

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