iLocater的实验室表征
Laboratory characterization of iLocater
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中文总结 AI 辅助
本文介绍为LBT设计的近红外高精度视向速度光谱仪iLocater的四项实验室表征工作，确立基线性能指标，证明其具备交付及在轨调试条件。
中文摘要 AI 辅助
iLocater是为大双筒望远镜（LBT）设计的衍射极限、光纤馈送光谱仪，旨在近红外波段实现高精度视向速度测量。部署前，全面的实验室表征对验证仪器性能、确定对准策略至关重要。本文呈现实验室表征四个关键领域的结果：（1）调整优化探测器取向，使光谱与焦平面上的探测器像素网格对准；（2）设计安装LED照明源，以生成高保真平场；（3）采用OpticStudio图像模拟的基于模型的聚焦方法，优化光谱仪的光学对准；（4）评估实验室条件下仪器的机械与光学稳定性。这些工作共同确立了基线性能指标，证明该仪器已具备交付及在轨调试的条件。
英文摘要
iLocater is a diffraction-limited, fiber-fed spectrograph designed for the Large Binocular Telescope (LBT), which targets high-precision radial velocity measurements in the near-infrared. Prior to deployment, comprehensive laboratory characterization was essential to validate instrument performance and inform alignment strategies. This paper presents results from four key areas of lab characterization: (1) adjustment and optimization of detector orientation to optimize spectrum alignment with the detector pixel grid across the focal plane; (2) the design and installation of a LED illumination source to enable high-fidelity flat-fields; (3) a model-based focusing methodology using OpticStudio image simulations to optimize the optical alignment of the spectrograph; and (4) assessment of instrument mechanical and optical stability under laboratory conditions. Together, these efforts established baseline performance metrics and demonstrated instrument readiness for delivery and on-sky commissioning.
