EXOhSPEC folded design optimization and performance estimation
EXOhSPEC folded design optimization and performance estimation
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EXOhSPEC 折叠设计优化和性能评估
DOI：
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发表时间：
2019
期刊：
影响因子：
--
通讯作者：
S. Aukkaravittayapun
中科院分区：
文献类型：
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作者：
Esther Lhospice;C. Buisset;Hugh R. A. Jones;William E. Martin;R. Errmann;Sirinrat Sithajan;C. Boonsri;Piyamas Choochalerm;G. Anglada;D. Campbell;M. Alagao;Jitsupa Paenoi;A. Prasit;T. Panyaphirawat;S. Rattanasoon;A. Leckngam;D. Mkrtichian;S. Aukkaravittayapun
EXOplanet高分辨率光谱仪（EXOhSPEC）仪器是一种专用于使用2m级望远镜采用径向速度法探测系外行星的阶梯光谱仪。该光谱仪可在 400 至 700 nm 的光谱范围内提供光谱分辨率 R < 70, 000 的光谱，并达到 3 m/s 的短期径向速度精度。为了实现这一目标，两个相邻光谱级之间的间隔被指定为大于 30 个像素，并且为了实现广泛的目标，仪器的吞吐量被指定为高于 4%。我们介绍了光谱仪准直器的优化结果及其光学性能的初步测试。首先，我们考虑光谱仪设计并估计其理论性能。我们表明理论图像质量接近衍射极限。其次，我们描述了使用 ZEMAX 软件进行公差分析的方法，以估计仪器在制造、组装和对准后的光学性能。我们展示了性能预算的结果，并表明 EXOhSPEC 的估计图像质量性能符合规范。第三，我们给出了杂散光分析的结果，我们表明科学信号和杂散光晕信号之间的最小比率高于1,000。最后，我们提供了 EXOhSPEC 项目的进展情况，并展示了通过原型的初步版本获得的第一个结果。
The EXOplanet high resolution SPECtrograph (EXOhSPEC) instrument is an echelle spectrograph dedicated to the detection of exoplanets by using the radial velocity method using 2m class telescopes. This spectrograph is specified to provide spectra with a spectral resolution R < 70, 000 over the spectral range from 400 to 700 nm and to reach a shortterm radial velocity precision of 3 m/s. To achieve this the separation between two adjacent spectral orders is specified to be greater than 30 pixels and to enable a wide range of targets the throughput of the instrument is specified to be higher than 4%. We present the results of the optimization of the spectrograph collimator performed and initial tests of its optical performance. First, we consider the spectrograph design and we estimate its theoretical performance. We show that the theoretical image quality is close to the diffraction limit. Second, we describe the method used to perform the tolerancing analyzes using ZEMAX software to estimate the optical performance of the instrument after manufacturing, assembly and alignment. We present the results of the performance budget and we show that the estimated image quality performance of EXOhSPEC are in line with the specifications. Third, we present the results of the stray light analysis and we show that the minimum ratio between the scientific signal and the stray light halo signal is higher than 1,000. Finally, we provide a status on the progress of the EXOhSPEC project and we show the first results obtained with a preliminary version of the prototype.
EXOhSPEC 准直器机械设计
DOI：
10.1117/12.2529107
发表时间：
2019
期刊：
--
影响因子：
--
作者：
Kawinkij A
通讯作者：
Kawinkij A