arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2002.00599astro-ph.IM
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Fabry-Pérot标准具III。手术工具应用

On Fabry-Pérot Etalon-based Instruments. III. Instrument applications

F. J. Bailén, D. Orozco Suárez, J. C. del Toro Iniesta

摘要:

Fabry-Pérot标准具的光谱、成像和偏振特性对基于这些设备的成像矢量磁像仪有影响。影响取决于光学配置(准直或远心),标准具相对于偏振计的相对位置,标准具的类型(气隙或晶体),甚至取决于所使用的偏振技术(单光束或双光束)。在本文中,我们评估的人工视线速度和磁场强度,出现在标准具为基础的仪器出席上述因素。我们区分的信号是隐含的远心安装由于波长依赖的点扩散函数和那些出现在准直和远心设置从双折射标准具的偏振响应。对于各向异性的情况下,我们考虑两个可能的位置的标准具,调制器和分析器之间或之后,我们包括不同的通道上的效果时,采用双光束偏振。我们还评估了由于照明中的缺陷和/或标准具相对于入射光束的倾斜而在远心安装件中产生的对称性损失的影响。

英文摘要:

The spectral, imaging, and polarimetric behavior of Fabry-Pérot etalons have an influence on imaging vector magnetograph instruments based on these devices. The impact depends, among others, on the optical configuration (collimated or telecentric), on the relative position of the etalon with respect to the polarimeter, on the type of etalon (air-gapped or crystalline), and even on the polarimetric technique to be used (single-beam or dual-beam). In this paper we evaluate the artificial line-of-sight velocities and magnetic field strengths that arise in etalon-based instruments attending to the mentioned factors. We differentiate between signals that are implicit to telecentric mounts due to the wavelength dependence of the point-spread function and those emerging in both collimated and telecentric setups from the polarimetric response of birefringent etalons. For the anisotropic case we consider two possible locations of the etalon, between the modulator and the analyzer or after it, and we include the effect on different channels when dual-beam polarimetry is employed. We also evaluate the impact of the loss of symmetry produced in telecentric mounts due to imperfections in the illumination and/or to a tilt of the etalon relative to the incident beam.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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