Comments on the optimization of high resolution Fabry-Pérot filtergraphs
Comments on the optimization of high resolution Fabry-Pérot filtergraphs
复制标题
高分辨率法布里-珀罗滤波器图优化评述
DOI：
10.1051/0004-6361:20052981
复制
发表时间：
2006
影响因子：
6.5
通讯作者：
G. Scharmer
中科院分区：
文献类型：
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作者：
G. Scharmer
在本文中，我们提出的法布里-珀罗（FPI）系统的性能，解决两个完全独立的方面的模拟结果。第一个问题涉及远心光学装置中使用的FPI的图像质量。我们表明，从相位误差发现的von der Luhe和Kentischer（2000年，A & AS，146，499）的图像退化可以在很大程度上通过重新聚焦补偿，图像退化的主要原因是由Beckers（1998年，A & AS，120，191）讨论的光瞳变迹。我们还讨论了FPI系统的优化，考虑腔误差的影响，在整个FOV的仪器功能（传输轮廓）的均匀性时，两个FPI结合在一个远心重成像系统。我们从几个数值实验的结论是，远心FPI系统，使用两个或更多的FPI高（94 - 95%）的反射率很可能会显示在整个FOV的仪器配置文件的大变化，除非腔误差显着小于2.0 nm。我们表明，这种均匀性可以在相对较低的“成本”方面获得增加的寄生光水平，通过降低FPI的反射率与最小的腔分离，而不是降低两个FPI的反射率。我们还表明，腔比的选择有很大的影响，在整个FOV的光谱透射分布的均匀性和双FPI系统的腔比约0.3执行比在0.6左右。
In this paper we present results of simulations of Fabry-Perot (FPI) system performance that address two entirely separate aspects. The first concerns the image quality of FPIs used in telecentric optical setups. We show that the image degradation from phase errors found by von der Luhe & Kentischer (2000, A&AS, 146, 499) can largely be compensated by refocusing and that the major cause of image degradation is the pupil apodization discussed by Beckers (1998, A&AS, 120, 191). We also discuss the optimization of FPI systems, considering the effects of cavity errors on the homogeneity of the instrument function (transmission profile) across the FOV when two FPIs are combined in a telecentric reimaging system. Our conclusions from several numerical experiments are that telecentric FPI systems that use two or more FPIs with high (94-95%) reflectivities are likely to show large variations in the instrument profile across the FOV unless the cavity errors are significantly smaller than 2.0 nm. We show, that such homogeneity can be obtained at relatively low "cost" in terms of increased parasitic light levels by lowering the reflectivity of the FPI with the smallest cavity separation rather then lowering the reflectivity of both FPIs. We also demonstrate that the choice of cavity ratios has a strong impact on the homogeneity of the spectral transmission profile across the FOV and that double FPI systems with cavity ratios around 0.3 perform much better than at around 0.6.