We have published the optical design and early test results of the Roman Space Telescope grism spectrometer in previous SPIE proceedings. We report the follow-on activity of the spectral and radiometric calibrations, including the calibration methods, experiment designs, and test equipment calibration, such as the light source and detectors used in the test. The grism calibration includes the throughput versus wavelength, which is largely determined by the diffraction efficiency of the two diffractive surfaces. It also includes spectral resolution, point spread function, and relative radiometric measurements. The measured results are presented. The comparisons between the test data and the theoretical simulations are also presented. The tests and results presented are from the engineering test unit in ambient room temperature environment. The thermal/vacuum tests are planned to verify the results when the flight unit is ready.

中文翻译：

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南希·格雷斯罗马太空望远镜无缝光谱仪的特性（grism）

我们在先前的SPIE程序中已经发布了罗马太空望远镜Grism光谱仪的光学设计和早期测试结果。我们报告光谱和辐射校准的后续活动，包括校准方法，实验设计和测试设备校准，例如测试中使用的光源和检测器。光栅校准包括吞吐量与波长的关系，吞吐量主要取决于两个衍射面的衍射效率。它还包括光谱分辨率，点扩展功能和相对辐射测量。给出了测量结果。还介绍了测试数据与理论仿真之间的比较。给出的测试和结果来自室温环境下的工程测试单元。