Measuring and Maintaining the Plate Parallelism of Fabry‐Pérot Etalons
Measuring and Maintaining the Plate Parallelism of Fabry‐Pérot Etalons
复制标题
测量和保持法布里-珀罗标准具的板平行度
DOI：
10.1086/497083
复制
发表时间：
2005
影响因子：
3.5
通讯作者：
A. Tritschler
中科院分区：
文献类型：
--
作者：
C. Denker;A. Tritschler
太阳上的许多动态现象需要高时间、空间和光谱分辨率的观测。基于Fabry-Pérot的成像光谱偏振技术可以满足这些需求，特别是与自适应光学和先进的图像恢复和处理技术相结合。因此，对仪器特性的详细了解是开发这些复杂系统能力的基础。我们提出了一种新的、高效的、健壮的算法来维持和量化Fabry-Pérot标准具的平板平行度。用Zernike多项式来量化平板特性，发现控制标准具倾斜运动的压电致动器的电压与平板平行度之间存在直接关系。板的缺陷可以方便地用泽尼克系数来描述，最高可达15阶。该算法已经在加利福尼亚州大熊太阳天文台的可见光成像磁强计上进行了测试。
Many dynamic phenomena on the Sun require observations with high temporal, spatial, and spectral resolution. Fabry‐Pérot–based imaging spectropolarimetry can serve these needs, especially in combination with adaptive optics and advanced image restoration and processing techniques. Therefore, a detailed understanding of the instrument characteristics is the foundation for exploiting the capabilities of these complex systems. We present a novel, efficient, and robust algorithm for maintaining and quantifying the plate parallelism of Fabry‐Pérot etalons. The plate characteristics are quantified in terms of Zernike polynomials, finding a direct relationship between the voltages applied to the piezoelectric actuators, which control the tip‐tilt motion of the etalon, and the plate parallelism. The plate defects are conveniently described by the Zernike coefficients up to 15th order. The algorithm has been tested with the visible‐light imaging magnetograph at the Big Bear Solar Observatory in California.