From colors to chemistry: a combined lenslet/slicer IFS for medium-resolution spectroscopy
From colors to chemistry: a combined lenslet/slicer IFS for medium-resolution spectroscopy
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DOI：
10.1117/12.2594802
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发表时间：
2021-09
期刊：
影响因子：
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通讯作者：
R. Stelter;A. Skemer;C. Bourgenot
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文献类型：
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作者：
R. Stelter;A. Skemer;C. Bourgenot
我们介绍了一台微透镜-切片器混合积分场光谱仪的设计和实验室性能，验证了这一概念在未来如Scale/PSI-Red等仪器中的应用。通过对太阳系外行星进行IF成像，就有可能测量它们的化学成分、温度和质量。许多专注于系外行星的仪器使用微透镜IF来制作数据立方体，这些数据立方体具有空间和光谱信息，用于提取成像的系外行星的光谱信息。微透镜迭代函数系统结构导致很短的光谱，因此光谱分辨率很低。切片式IFSS可以获得更高的光谱分辨率，但代价是增加了通过下游光谱仪传播的光学像差，并降低了我们可以提取的空间信息。我们设计了一种小透镜/切片器的混合体，它结合了小透镜迭代函数系统的最小像差和切片器迭代函数系统的高光谱分辨率。切片器输出f/#与小透镜f/#匹配，仅需要额外的光栅。
We present the design and lab performance of a prototype lenslet-slicer hybrid integral field spectrograph (IFS), validating the concept for use in future instruments like SCALES/PSI-Red. By imaging extrasolar planets with IFS, it is possible to measure their chemical compositions, temperatures and masses. Many exoplanet-focused instruments use a lenslet IFS to make datacubes with spatial and spectral information used to extract spectral information of imaged exoplanets. Lenslet IFS architecture results in very short spectra and thus low spectral resolution. Slicer IFSs can obtain higher spectral resolution but at the cost of increased optical aberrations that propagate through the down-stream spectrograph and degrade the spatial information we can extract. We have designed a lenslet/slicer hybrid that combines the minimal aberrations of the lenslet IFS with the high spectral resolution of the slicer IFS. The slicer output f/# matches the lenslet f/# requiring only additional gratings.