Our paper discusses the optical design of the Origins Space Telescope. Origins is one of four large missions under study in preparation for the 2020 Decadal Survey in Astronomy and Astrophysics. Sensitive to the mid- and far-infrared spectrum (between 2.8 and 588 μm), Origins sets out to answer a number of important scientific questions by addressing NASA’s three key science goals in astrophysics. The Origins telescope operates at f / 14. The design includes a 5.9-m-diameter primary mirror. The large on-axis primary consists of 18 “keystone” segments of two different prescriptions arranged in two annuli (six inner and twelve outer segments) that together form a circular aperture in the goal of achieving a symmetric point spread function. To accommodate the 46 × 15 arc min full field of view (FOV) of the telescope at the design wavelength of λ = 30 μm, a three-mirror anastigmat configuration is used. The design is diffraction-limited across its instruments’ FOV. A brief discussion of each of the three baselined instruments within the Instrument Accommodation Module is presented: (1) Origins Survey Spectrometer, (2) Mid-infrared Spectrometer, Camera transit spectrometer channel, and (3) Far-Infrared Polarimeter/Imager. In addition, the upscope options for the observatory are laid out as well including a fourth instrument: the Heterodyne Receiver for Origins.

中文翻译：

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起源太空望远镜的光学设计

本文讨论了起源太空望远镜的光学设计。Origins是为2020年天文学和天体物理学十年调查做准备的四个大型任务之一。Origins对中红外和远红外光谱（2.8至588μm之间）敏感，着眼于解决NASA在天体物理学中的三个关键科学目标，从而回答了许多重要的科学问题。Origins望远镜的工作温度为f /14。该设计包括一个直径为5.9 m的主镜。大的轴向主要部分由两个不同处方的18个“梯形失真”部分组成，排列在两个环形空间（六个内部和十二个外部部分）中，共同形成一个圆形孔，以实现对称点扩散功能。为了在λ= 30μm的设计波长下容纳46×15弧分的最小全视场（FOV），使用了三反射镜配置。该设计在其仪器的FOV范围内受到衍射限制。简要介绍了仪器容纳模块中的三种基准仪器：（1）起源调查光谱仪，（2）中红外光谱仪，相机传输光谱仪通道，以及（3）远红外旋光仪/成像仪。此外，还设置了天文台的高倍镜选件，其中包括第四种仪器：外星人起源接收器。简要介绍了仪器容纳模块中的三种基准仪器：（1）起源调查光谱仪，（2）中红外光谱仪，相机传输光谱仪通道，以及（3）远红外旋光仪/成像仪。此外，还设置了天文台的高倍镜选件，其中包括第四种仪器：外星人起源接收器。简要介绍了仪器容纳模块中的三种基准仪器：（1）起源调查光谱仪，（2）中红外光谱仪，相机传输光谱仪通道，以及（3）远红外旋光仪/成像仪。此外，还设置了天文台的高倍镜选件，其中包括第四种仪器：外星人起源接收器。