Design, Implementation, and On-Sky Performance of an Advanced Apochromatic Triplet Atmospheric Dispersion Corrector for the Magellan Adaptive Optics System and VisAO Camera
Design, Implementation, and On-Sky Performance of an Advanced Apochromatic Triplet Atmospheric Dispersion Corrector for the Magellan Adaptive Optics System and VisAO Camera
复制标题
用于麦哲伦自适应光学系统和 VisAO 相机的先进复消色差三重态大气色散校正器的设计、实现和在天性能
DOI：
10.1086/672091
复制
发表时间：
2013
影响因子：
3.5
通讯作者：
V. Gasho
中科院分区：
文献类型：
--
作者：
D. Kopon;L. Close;J. Males;V. Gasho
我们展示了先进的三重态大气色散校正器 (ADC) 的新颖设计、实验室验证和在天性能，该系统是麦哲伦自适应光学系统 (MagAO) 的重要组成部分，最近于 2012 年 12 月实现了第一束光。可见光波长下的高精度宽带 (0.5–1.0 μm) 大气色散校正对于较暗导星上的波前传感 (WFS) 以及使用我们的 VisAO 科学相机进行可见光 AO 科学至关重要。与传统的双合态设计相比，在 2 个气团（距天顶 60°）和 500-1000 nm 波段内，我们的三重态设计使几何 rms 光斑尺寸提高了 57%，在 20 英寸半径处的环绕能量提高了 33%，斯特列尔比提高了 62%。该三联体设计已在实验室中制造、测试，并集成到 MagAO WFS 和 VisAO 科学相机中。我们展示了 ADC 与 MagAO 系统一起运行的空中结果。我们还提出了零光束偏差三重态 ADC 设计，这对于未来的 AO 系统非常重要，除了衍射限制宽带色散校正之外，还需要在大范围气团上精确对准光轴。
We present the novel design, laboratory verification, and on-sky performance of our advanced triplet atmospheric dispersion corrector (ADC), an important component of the Magellan Adaptive Optics system (MagAO), which recently achieved first light in December 2012. High-precision broadband (0.5–1.0 μm) atmospheric dispersion correction at visible wavelengths is essential both for wavefront sensing (WFS) on fainter guide stars, and for performing visible AO science using our VisAO science camera. At 2 airmasses (60° from zenith) and over the waveband 500–1000 nm, our triplet design produces a 57% improvement in geometric rms spot size, a 33% improvement in encircled energy at 20″ radius, and a 62% improvement in Strehl ratio when compared to a conventional doublet design. This triplet design has been fabricated, tested in the lab, and integrated into the MagAO WFS and the VisAO science camera. We present on-sky results of the ADC in operation with the MagAO system. We also present a zero-beam-deviation triplet ADC design, which will be important to future AO systems that require precise alignment of the optical axis over a large range of airmasses in addition to diffraction-limited broadband dispersion correction.