论文标题
主要客观光栅望远镜：光学特性和应用的可行性
Primary Objective Grating Telescopy: Optical Properties and Feasibility of Applications
论文作者
论文摘要
我们建立了原始客观光栅（POG）望远镜的理论基础。近年来，托马斯·D·迪托（Thomas D. Ditto）提出了广泛的望远镜设计，这些望远镜设计收集了大光栅上的光线，并以二级接收光学件将其集中在放牧式出埃及记上，并有时将其称为同型镜。应用包括分类外行星的发现和表征，近地小行星的发现以及天空的光谱调查。这些望远镜的空中质量很小，因此为将大型望远镜带入太空提供了前进的路径。由于这一系列的望远镜设计与传统的望远镜设计背道而驰，因此很难评估哪些应用对于此设计最有利。在这里，我们定义了一个新的功绩，即“修改后的”，该图是pog的光子收集能力的特征。证明观测值的衍射极限取决于光栅的长度。我们使用第二个分散元件评估了大气观察对地面应用的影响以及在焦平面中的位置与波长的歧义。最后，讨论了一些充分收获POG光学特征的益处的策略。
We develop the theoretical foundation for primary objective grating (POG) telescopy. In recent years, a wide range of telescope designs that collect the light over a large grating and focus it with a secondary receiving optic that is placed at grazing exodus have been proposed by Thomas D. Ditto, and are sometimes referred to as Dittoscopes. Applications include discovery and characterization of exoplanets, discovery of near-Earth asteroids, and spectroscopic surveys of the sky. These telescopes would have small aerial mass, and therefore provide a path forward to launch large telescopes into space. Because this series of telescope designs departs from traditional telescope designs, it has been difficult to evaluate which applications are most advantageous for this design. Here, we define a new figure of merit, the "modified etendue," that characterizes the photon collection capability of a POG. It is demonstrated that the diffraction limit for observations is determined by the length of the grating. We evaluate the effects of atmospheric seeing for ground-based applications and the disambiguation of position vs. wavelength in the focal plane using a second dispersing element. Finally, some strategies for fully reaping the benefits of POG optical characteristics are discussed.
