The Roman Space Telescope Grism and Prism assemblies will allow the wide-field instrument (WFI) to perform slitless, multi-object spectroscopy across the complete field of view. These optical elements play a critical role in the High Latitude Wide Area and High Latitude Time Domain Surveys, which are designed to produce robust spectroscopic redshifts for millions of objects over the mission lifetime. To facilitate the characterization of these assemblies, a dedicated test bed was designed and utilized to perform a wide variety of spectroscopic measurements over the full range of operational wavelengths and field angles. Characterized features include, but are not limited to dispersion magnitude, dispersion clocking, encircled energy, total throughput, and bandpass edges. We present the results of this experimental campaign in which the Grism and Prism assemblies met or exceeded many of their design requirements and discuss measurement limitations.

中文翻译：

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南希·格雷斯·罗马太空望远镜的棱镜和棱镜无缝光谱仪的光谱表征

罗马太空望远镜棱镜和棱镜组件将使宽视场仪器（WFI）能够在整个视场内执行无缝、多物体光谱分析。这些光学元件在高纬度广域和高纬度时域勘测中发挥着关键作用，这些勘测旨在在任务生命周期内为数百万个物体产生强大的光谱红移。为了便于表征这些组件，设计并利用了专用测试台在整个工作波长和视场角范围内执行各种光谱测量。表征特征包括但不限于色散幅度、色散时钟、环绕能量、总吞吐量和带通边缘。我们展示了该实验活动的结果，其中 Grism 和 Prism 组件满足或超过了许多设计要求，并讨论了测量限制。