蜘蛛臂渐晕对变形镜干涉测量的影响

IF 1.7 3区 工程技术 Q2 ENGINEERING, AEROSPACE
R. Briguglio, G. Pariani, M. Xompero, Nicolò Azzaroli, C. Selmi, A. Riccardi, L. Oggioni
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引用次数: 0

摘要

摘要自适应光学中变形镜的干涉定标和测量经常在复杂的蜘蛛臂光学系统中进行。蜘蛛影可能会将探测器上的镜面分割成独立的岛屿,因此干涉仪无法将它们重新连接到一个共同的相位值。校准测量结果会受到岛屿上的人工差速活塞的影响,这些差速活塞会转换成错误的执行器命令,从而导致校准结果不佳。本文综述了大口径自适应镜(如大双筒望远镜和甚大望远镜)在光学校准过程中所经历的蜘蛛臂阴影效应;我们描述了我们为处理这些问题而测试的程序及其有效性;我们提出了一个实验室评估的效果,这种阴影与专门的测试设置。我们的工作是欧洲超大望远镜M4自适应反射镜光学测试准备活动的一部分。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
On the effects of spider-arms vignetting on interferometric measurements of deformable mirrors
Abstract. The interferometric calibration and measurement of deformable mirrors for adaptive optics are often performed on complex optical system with spider arms. The spider shadows may divide the mirror surface into separate islands on the detector, so the interferometer fails in reconnecting them to a common phase value. The calibration measurements then suffer from such artificial differential pistons across islands, which is converted into a wrong actuator command and in general into a poor calibration. We review the effects of spider arms shadowing as experienced during the optical calibration of large format adaptive mirrors, such as the Large Binocular Telescope and Very Large Telescope ones; we describe the procedures that we tested to cope with these issues and their effectiveness; and we present a laboratory assessment of the effect of such a shadowing with a dedicated test setup. Our work is part of a preparatory activity for the optical test of the European Extremely Large Telescope adaptive mirror M4.
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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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