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arXiv 1111.5099astro-ph.IMphysics.optics
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方孔PIAA日冕仪的设计

Design of PIAA coronagraphs over square apertures

Laurent Pueyo, N. Jeremy Kasdin, Alexis Carlotti, Robert Vanderbei

摘要:

本文的目的是提出一个理论研究的结果有关的PIAA单位使用变形镜的可行性。我们首先回顾了驱动PIAA的设计方程的一般推导。然后,我们将展示如何解决这些方程的方孔,并显示在射线光学制度的纯PIAA系统的性能。我们把这些设计方程的边缘衍射效应的研究,并提供了一个通用的表达后,通过PIAA日冕充分传播的领域。第三,我们说明了如何前和后切趾器的组合产量的对比度为10^10,即使在衍射效应的存在下,配置既没有波前误差或波前控制。最后,我们提出了新的PIAA配置方孔绕过PIAA光学制造的限制,诱导切趾与两个正方形变形镜(DM)。这样的解决方案依赖于比当前设想的静态PIAA解决方案更小的瞳孔尺寸,并且因此需要积极的变迹前和变迹后屏幕,以便减轻两个反射镜之间的衍射效应。因此,它们与性能(特别是吞吐量)的显著损失相关联。

英文摘要:

The purpose of this paper is to present the results of a theoretical study pertaining to the feasibility of PIAA units using Deformable Mirrors. We begin by reviewing the general derivation of the design equations driving PIAA. We then show how to solve these equations for square apertures and show the performance of pure PIAA systems in the ray optics regime. We tie these design equations into the study of edge diffraction effects, and provide a general expression for the field after a full propagation through a PIAA coronagraph. Third, we illustrate how a combination of pre and post apodisers yields to a contrast of 10^10 even in the presence of diffractive effects, for configuration with neither wavefront errors or wavefront control. Finally we present novel PIAA configurations over square apertures which circumvent the constraints on the manufacturing of PIAA optics by inducing the apodisation with two square Deformable Mirrors (DM). Such solutions rely on pupil size smaller than currently envisioned static PIAA solutions and thus require aggressive pre and post-apodizing screens in order to mitigate for diffractive effect between the two mirrors. As a result they are associated to significant loss in performance, throughput in particular.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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