1 米精度红外磁系统望远镜的光学对准技术

IF 1.7 3区 工程技术 Q2 ENGINEERING, AEROSPACE
Xing Fu, Yu Lei, Hua Li, Kewei E., Peng Wang, Junpeng Liu, Yuliang Shen, Dongguang Wang
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引用次数: 0

摘要

精确红外磁系统(AIMS)是一个有效孔径为 1 米的地面太阳望远镜。由于一些反射镜在空间上是各向异性的,平行光在通过光瞳后会发生复杂的空间反射。此外,还要求部分光轴与机械旋转轴重合。该系统很难对准。本文提出了两种创新的对准方法。首先,提出了一种模块化对准方法。每个模块都单独装配,并预留光学基准。通过每个模块的光学基准可完成系统集成。第二,采用计算机辅助对准技术实现完美波前。通过扰动副镜(M2),测量 M2 位置对波面的影响,并得出数学关系。根据测得的波前数据,采用最小二乘法计算 M2 的对准,并对 M2 进行多次调整。最终系统波前的 RMS=0.12 λ@632.8 nm。通过对恒星和太阳黑子的观测,证明光学系统具有良好的波前质量。观测到的太阳黑子清晰可见,半影和本影清晰可辨。所提出的方法已得到验证,并为复杂的大口径离轴望远镜提供了有效的对准解决方案。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Optical alignment technology for 1-meter accurate infrared magnetic system telescope
Accurate infrared magnetic system (AIMS) is a ground-based solar telescope with the effective aperture of 1 m. The system has complex optical path and contains multiple aspherical mirrors. Since some mirrors are anisotropic in space, parallel light undergoes complex spatial reflection after passing through the optical pupil. It is also required that part of the optical axis coincides with the mechanical rotation axis. The system is difficult to align. This article proposes two innovative alignment methods. First, a modularized alignment method is presented. Each module is individually assembled with optical reference reserved. System integration can be completed through optical reference of each module. Second, computer-aided alignment technology is adopted to achieve perfect wavefront. By perturbing the secondary mirror (M2), the influence of M2 position on the wavefront is measured and the mathematical relationship is obtained. Based on the measured wavefront data, the least squares method is used to calculate the M2 alignment and multiple adjustments have been made to M2. The final system wavefront has reached RMS=0.12 λ@632.8 nm. Through observations of stars and sunspots, it has been demonstrated that the optical system has good wavefront quality. The observed sunspot is clear with the penumbral and umbra discernible. The proposed method has been verified and provides an effective alignment solution for complex off-axis telescope with large aperture.
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来源期刊
CiteScore
4.40
自引率
13.00%
发文量
119
期刊介绍: The Journal of Astronomical Telescopes, Instruments, and Systems publishes peer-reviewed papers reporting on original research in the development, testing, and application of telescopes, instrumentation, techniques, and systems for ground- and space-based astronomy.
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