AI 中文总结
介绍欧洲极大望远镜上HARMONI光谱仪子系统光学设计，因顶层目标和规格变化而修订，采用双镜无遮拦准直器等，更紧凑，用变形自由曲面镜校正像差，提高探测器单元透过率、减少散射光并改善可达性。
AI 中文摘要
HARMONI是用于欧洲极大望远镜的自适应光学辅助近红外积分场光谱仪。它覆盖750纳米至2450纳米光谱范围，分辨率为3000至7000，空间采样为25毫角秒和6毫角秒，可在SCAO和MCAO两种自适应光学模式下运行。光谱仪是HARMONI仪器光学系统的最后一个光学子系统，负责分散光线并在科学探测器上形成二维光谱图。顶层目标和规格的变化导致光谱仪光学设计大幅修订。当前基线设计包括双镜无遮拦准直器、一组六个体相位全息光栅和双镜无遮拦相机。该设计比以前版本更紧凑，使用变形自由曲面镜校正像差，预计探测器单元可达至少57%的透过率，且散射光减少、可达性提高。
英文摘要
HARMONI is an adaptive optics assisted, near infrared integral field spectrograph for the European Extremely Large Telescope. It covers a spectral range from 750 nm to 2450 nm with resolving powers from 3000 to 7000 and spatial sampling of 25 mas and 6 mas. It can operate in two adaptive optics modes, SCAO and MCAO. The spectrograph represents the last optical sub-system of the HARMONI instrument optical train that disperses the light and forms a two-dimensional spectrogram on its scientific detectors. Changes in the top-level goals and specifications have led to a significant revision of the spectrograph optical design. The current baseline design consists of a two-mirror unobscured collimator, a set of six volume-phase holographic grisms, and a two-mirror unobscured camera. The design is more compact than the previous version, it uses anamorphic freeform mirrors to correct aberrations, and is expected to reach a minimum transmission 57% with improved accessibility of the detector unit and reduced scattered light.
Comments13 pages, 10 figures, SPIE Astronomical Telescopes + Instrumentation 2026
