Altieri F, Filacchione G, Capaccioni F, Carli C, Dami M, Tommasi L, Aroldi G, Borrelli D, Barbis A, Baroni M, Pastorini G, Ficai Veltroni I, Mugnuolo R
INAF-IAPS, Istituto di Astrofisica e Planetologia Spaziali, via del Fosso del Cavaliere, 100, 00133 Rome, Italy.
Leonardo Company, via delle Officine Galileo, 1, Campi Bisenzio, Florence, Italy.
Rev Sci Instrum. 2017 Sep;88(9):094503. doi: 10.1063/1.4996857.
The Visible and near Infrared Hyperspectral Imager (VIHI) is the VIS-IR spectrometer with imaging capabilities aboard the ESA BepiColombo mission to Mercury. In this second paper, we report the instrument spectral characterization derived by the calibration campaign carried out before spacecraft integration. Complementary measurements concerning radiometric and linearity responses, as well as geometric performances, are described in Paper I [G. Filacchione et al., Rev. Sci. Instrum. 88, 094502 (2017)]. We have verified the VIHI spectral range, spectral dispersion, spectral response function, and spectral uniformity along the whole slit. Instrumental defects and optical aberrations due to smiling and keystone effects have been evaluated, and they are lower than the design requirement (<1/3 pixel). The instrumental response is uniform along the whole slit, while spectral dispersion is well represented by a second order curve, rather than to be constant along the spectral dimension.
可见与近红外高光谱成像仪（VIHI）是搭载于欧洲航天局（ESA）“贝皮科伦坡”号水星探测任务的具备成像能力的可见-红外光谱仪。在这第二篇论文中，我们报告了在航天器集成之前进行的校准活动所获得的仪器光谱特性。关于辐射度和线性响应以及几何性能的补充测量在第一篇论文[G. 菲拉基奥内等人，《科学仪器评论》88, 094502 (2017)]中有描述。我们已经验证了VIHI的光谱范围、光谱色散、光谱响应函数以及沿整个狭缝的光谱均匀性。由于微笑效应和梯形失真效应导致的仪器缺陷和光学像差已被评估，并且它们低于设计要求（<1/3像素）。仪器响应在整个狭缝上是均匀的，而光谱色散由二阶曲线很好地表示，而不是在光谱维度上保持恒定。
