Optical System Design of High Throughput Multi-Channel Spectrograph for Very Large Telescope

被引：0

作者：

Ji H. ^{[1
,2
,3
]}

Zhu Y. ^{[1
,2
]}

Hu Z. ^{[1
,2
]}

机构：

[1] Nanjing Institute of Astronomical Optics & Technology, National Astronomical Observatories, Chinese Academy of Sciences, Nanjing, 210042, Jiangsu

[2] Key Laboratory of Astronomical Optics & Technology, Chinese Academy of Sciences, Nanjing, 210042, Jiangsu

[3] University of Chinese Academy of Sciences, Beijing

来源：

Guangxue Xuebao/Acta Optica Sinica | 2019年 / 39卷 / 03期

关键词：

Optical design; Spectrograph; Very large telescope; Volume phase holographic grating;

D O I：

10.3788/AOS201939.0330003

中图分类号：

学科分类号：

摘要：

An analysis model based on boundary limits for multi-channel spectrograph with the broad band and high throughput is built. The relationships among performance requirements, initial parameters, project budget, and risk of the multi-channel spectrograph are discussed. The mathematic model can get structural parameters of each sub-system of the multi-channel spectrograph quickly according to the given system requirements. It also provide a valuable method to evaluate the feasibility of the design and cost budget reasonably at the beginning of the project. A multi-channel spectrograph based on volume phase holographic gratings is designed for the 4 m telescope. It has a wavelength range from 350 nm to 1000 nm and resolution of 5000 at the blazed wavelength in each channel. The peak efficiency of the whole spectrograph is over 53%, and the monochromatic enclosed energy at 80% is better than 15 μm with the whole working band, which meets the requirements of system performance. © 2019, Chinese Lasers Press. All right reserved.

引用

共 15 条

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