AI 中文总结
介绍用于极大望远镜的METIS LMS中红外积分场光谱仪，阐述对其积分场单元子系统进行光学测试和对准的方法，包括对图像切片镜阵列的详细表征及相关测量，概述对准策略以满足严格要求。
AI 中文摘要
METIS LMS是用于欧洲南方天文台极大望远镜的高分辨率（R>100,000）中红外积分场光谱仪。它能通过图像切片积分场单元在0.577×0.897角秒视场测量瞬时光谱，空间采样为8.2 - 9.1毫角秒。本文介绍了对积分场单元子系统的光学测试和对准。包括通过重成像测试和精确干涉测量对图像切片镜阵列的详细表征，还概述了积分场单元AIT过程中的光学对准策略以满足严格对准要求。
英文摘要
The METIS LMS (LM-band Spectrometer) is a high-resolution (R>100,000) mid-infrared integral field spectrometer for the ESO ELT. The instrument provides the capability to measure instantaneous spectra across a 0.577 x 0.897 arcsecond field-of-view with a spatial sampling of 8.2-9.1 mas using an image slicing IFU. This paper presents the optical testing and alignment performed for the IFU sub-system. This includes the detailed characterisation of the image slicing mirror array measured via: a re-imaging test in which the slicer is positioned to re-image a point source to form 28 images due to the different tilts of the 28 slicer mirrors; and precise interferometric measurements of each of the image slicer mirrors. The paper will also give an overview of the optical alignment strategy employed during the IFU AIT process in order to reach the tight alignment requirements.
Comments16 pages, 19 figures, presented at SPIE Astronomical Telescope and Instrumentation, Copenhagen, 2026
