Dawson Olivia R, Harris Walter M
Jet Propulsion Laboratory, 4800 Oak Grove Drive, Pasadena, California 91109, USA.
Appl Opt. 2009 Jul 20;48(21):4227-38. doi: 10.1364/ao.48.004227.
A spatial heterodyne spectrometer (SHS) is an interferometric device that combines high resolving power and a large input acceptance angle in a compact format suitable for use at small telescope focal planes and spacecraft for observations of faint, angularly extended emission-line sources. The primary limitation of SHS instruments has come from the spatial sampling of their output interference pattern image, which limits their use to a narrow bandpass. We describe the first-light results from a broadband all-reflective SHS that can be mechanically aligned to any heterodyne wavelength from 300 to 700 nm. Such an instrument can be extremely useful for the near simultaneous study of the brightness and line shapes of major atomic and molecular diagnostic emissions from extended astrophysical targets such as comets or planetary atmospheres. We discuss the results of this validation program and the potential improvements that could be used to expand and/or improve the broadband spectral response of the instrument.
空间外差光谱仪（SHS）是一种干涉仪设备，它以紧凑的形式将高分辨率和大输入接收角结合在一起，适用于小型望远镜焦平面和航天器，用于观测微弱的、角向扩展的发射线源。SHS仪器的主要限制来自其输出干涉图样图像的空间采样，这将其使用限制在窄带通范围内。我们描述了一种宽带全反射SHS的首次观测结果，该光谱仪可以机械对准300至700纳米的任何外差波长。这样的仪器对于近乎同时研究来自彗星或行星大气层等扩展天体物理目标的主要原子和分子诊断发射的亮度和线形极为有用。我们讨论了该验证计划的结果以及可用于扩展和/或改善仪器宽带光谱响应的潜在改进措施。
