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Performance optimization and light-beam-deviation analysis of the parallel-slab division-of-amplitude photopolarimeter

机译:平行平板振幅分光光度计的性能优化和光束偏离分析

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A division-of-amplitude photopolarimeter that uses a parallel-slab multiple-reflection beam splitter was described recently [Opt. Lett. 21, 1709 (1996)]. We provide a general analysis and an optimization of a specific design that uses a fused-silica slab that is uniformly coated with a transparent thin film of ZnS on the front surface and with an opaque Ag or Au reflecting layer on the back. Multiple internal reflections within the slab give rise to a set of parallel, equispaced, reflected beams numbered 0, 1, 2, and 3 that are intercepted by photodetectors D_(0), D_(1), D_(2), and D_(3), respectively, to produce output electrical signals i_(0), i_(1), i_(2), and i_(3), respectively. The instrument matrix A, which relates the output-signal vector I to the input Stokes vector S by I = AS, and its determinant D are analyzed. The instrument matrix A is nonsingular; hence all four Stokes parameters can be measured simultaneously over a broad spectral range (UV-VIS-IR). The optimum film thickness, the optimum angle of incidence, and the effect of light-beam deviation on the measured input Stokes parameters are considered.
机译:最近描述了一种使用平行板多反射分束器的振幅分光光度计[Opt。来吧21,1709(1996)]。我们提供了一个特定设计的一般分析和优化,该设计使用了熔融石英平板,该平板在正面均匀地涂覆有ZnS透明薄膜,在背面均匀地覆盖有不透明的Ag或Au反射层。平板内的多次内部反射会产生一组平行的,等距的反射光束,分别为0、1、2和3,它们被光电探测器D_(0),D_(1),D_(2)和D_( 3)分别产生输出电信号i_(0),i_(1),i_(2)和i_(3)。仪器矩阵A通过I = AS将输出信号矢量I与输入斯托克斯矢量S相关联,并对其行列式D进行了分析。仪器矩阵A是非奇异的;因此,可以在很宽的光谱范围(UV-VIS-IR)上同时测量所有四个斯托克斯参数。考虑了最佳薄膜厚度,最佳入射角以及光束偏差对测得的输入斯托克斯参数的影响。

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