SUPA and School of Physics and Astronomy, University of Glasgow, Kelvin Building, Renfrewshire, Glasgow, G12 8QQ, UK.
Sci Rep. 2019 Feb 25;9(1):2688. doi: 10.1038/s41598-019-39118-0.
Light's polarisation contains information about its source and interactions, from distant stars to biological samples. Polarimeters can recover this information, but reliance on birefringent or rotating optical elements limits their wavelength range and stability. Here we present a static, single-shot polarimeter based on a Fresnel cone - the direct spatial analogue to the popular rotating quarter-wave plate approach. We measure the average angular accuracy to be 2.9° (3.6°) for elliptical (linear) polarization states across the visible spectrum, with the degree of polarisation determined to within 0.12 (0.08). Our broadband full Stokes polarimeter is robust, cost-effective, and could find applications in hyper-spectral polarimetry and scanning microscopy.
光的偏振包含有关其来源和相互作用的信息，从遥远的恒星到生物样本。偏振仪可以恢复这些信息，但对双折射或旋转光学元件的依赖限制了它们的波长范围和稳定性。在这里，我们提出了一种基于菲涅耳锥的静态、单次拍摄偏振仪-这是流行的旋转四分之一波片方法的直接空间模拟。我们测量的平均角度精度为 2.9°（3.6°），用于可见光谱中的椭圆（线性）偏振状态，偏振度的确定精度为 0.12（0.08）。我们的宽带全斯托克斯偏振仪具有鲁棒性、成本效益高，可在超光谱偏振和扫描显微镜中找到应用。
