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arXiv 2310.04697astro-ph.IM
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极大光谱巡天望远镜的光学系统

Optical system for extremely large spectroscopic survey telescope

Ding-qiang Su, Hua Bai, Xiangyan Yuan, Xiangqun Cui

AI总结:

本文为极大光谱巡天望远镜设计纯反射光学系统,结合条状棱镜大气色散校正器,以12米望远镜为例实现大视场与优异像质,并可放大至16米,获得全球最大集光本领。

摘要:

本文介绍了一项关于光谱巡天望远镜的研究工作。我们的思路如下:针对此类望远镜,设计一个纯反射光学系统,该系统应具有尽可能大的孔径和视场(FOV)以及优异的成像质量,然后添加一个条状棱镜(透镜-棱镜)大气色散校正器(S-ADC),仅用于校正大气色散。鉴于经费限制和易于放大的特点,本文以若干12米望远镜作为设计实例。Su、Korsch和Meinel提出了四镜Nasmyth系统I和II,本文采用了这些系统。视场选择了1.5°、2°和2.5°。对于所有系统,成像质量均十分优异。由于S-ADC放宽了光学玻璃尺寸的限制,这款视场为2.5°的12米望远镜可以按比例放大为16米望远镜。其集光本领(源自法语étendue)和焦面规模将成为世界之最。在这种望远镜中,也可以获得纯反射光学系统。随后设计了一个具有优异成像质量的库德(coudé)系统。

英文摘要:

This article presents research work on a spectroscopic survey telescope. Our idea is as follows: for such a telescope, a pure reflecting optical system is designed, which should have an aperture and a field of view (FOV) both as large as possible and excellent image quality, and then a strip lensm (lens-prism) atmospheric dispersion corrector (S-ADC) is added, only for correcting the atmospheric dispersion. Given the fund limitation and the simplicity of scaling up, some 12-m telescopes are designed as examples. Su, Korsch, and Meinel put forward the four-mirror Nasmyth systems I and II, which are used in this paper. FOVs of 1.5°, 2°, and 2.5° are selected. For all systems, the image qualities are excellent. Because the S-ADC relaxes the optical glass size restriction, this 12-m telescope with a FOV of 2.5° can be magnified in proportion to a 16-m telescope. Its etendue (from French étendue) and focal surface will now be the largest in the world. In such a telescope, a pure reflecting optical system can also be obtained. A subsequent coudé system is designed with excellent image quality.

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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