AI 中文总结
介绍用于极大望远镜的高分辨率光谱仪ANDES中YJH光谱仪，阐述其波长覆盖、分辨率及稳定性等要求，分析当前设计与性能，概述工程挑战与应对策略，详述主色散元件技术发展。
AI 中文摘要
阿玛佐内斯高色散阶梯光谱仪（ANDES）是用于极大望远镜（ELT）的强大第二代高分辨率光谱仪器。其UBV、RIZ和YJH模块构成基线设计的光纤馈入光谱仪，可提供0.35 - 1.8微米连续波长覆盖，增加K波段通道后可达2.4微米。光谱分辨率约100,000，需在24小时内达到1米/秒波长校准稳定性，目标是10年内达0.02米/秒。本文介绍了ANDES YJH光谱仪当前设计与性能分析，概述工程挑战及应对策略，详述了主色散元件技术发展。
英文摘要
The ArmazoNes high Dispersion Echelle Spectrograph (ANDES) is a powerful second-generation high-resolution spectroscopic instrument for the Extremely Large Telescope (ELT). The UBV, RIZ, and YJH modules comprise fibre-fed spectrographs of the ANDES baseline design and will offer continuous wavelength coverage of 0.35-1.8 $μ$m, with the addition of a K-band channel providing coverage up to 2.4 $μ$m. Coupled with a spectral resolution of $\sim$100,000, ANDES must deliver the required wavelength calibration stability of 1 m/s over 24 hours, with a goal of 0.02 m/s across 10 years. These requirements establish the framework for the infrared module of ANDES, the YJH Spectrograph, leading to what will likely be the largest cryogenic, ultra-stable, high-resolution spectrograph ever built, and will offer the unique ability to observe in both seeing- and diffraction-limited modes interchangeably. We present the current design and performance analysis of the ANDES YJH Spectrograph, outlining the engineering challenges encountered alongside the corresponding strategies adopted to navigate them. In particular, we detail the technology development of the primary dispersing element, an echelle grating mosaic that will span over a metre in length.
Comments17 pages, 16 figures, SPIE Astronomical Telescopes + Instrumentation 2026
