VisIRIS: a visible/IR imaging spectropolarimeter based on a birefringent fiber-optic image slicer
VisIRIS: a visible/IR imaging spectropolarimeter based on a birefringent fiber-optic image slicer
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VisIRIS：基于双折射光纤图像切片器的可见光/红外成像分光偏振仪
DOI：
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发表时间：
2006
期刊：
影响因子：
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通讯作者：
A. Versteegh
中科院分区：
文献类型：
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作者：
Haosheng Lin;A. Versteegh
可见光和红外波段的高分辨率成像光谱偏振测量是许多天体物理问题最有效和最准确的观测诊断工具，但其中许多问题还需要空间分辨率的二维视场。然而，使用常规设计的仪器很难同时实现三维(x、y和λ)覆盖。传统的光谱仪或者通过扫描可调谐滤光器通过感兴趣的光谱窗口，或者通过扫描基于衍射光栅的长缝光谱仪通过目标区域来实现三维覆盖。无论是在光谱方向还是在空间方向上进行扫描，都不可避免地会降低数据的质量，而且非常耗时。本文介绍了一种基于新型双折射光纤图像切割器和多缝光谱仪的新型可见光/红外成像光谱仪的设计。利用这种设计，可以实现大视场、高空间分辨率和高光谱分辨率的天文物体的同步三维成像光谱偏振测量。
High-resolution imaging spectropolarimetry in the visible and infrared wavelengths is the most effective and accurate observational diagnostic tool for many astrophysical problems, but many among them also require a spatially resolved two-dimensional field of view. However, it is difficult to achieve simultaneous three-dimensional (x, y, and λ) coverage using instruments with a conventional design. A conventional spectrograph achieves three-dimensional coverage either by scanning a tunable filter through the spectral window of interest, or by scanning a diffraction-grating-based long-slit spectrograph through the target region. Scanning in either spectral or spatial direction unavoidably degrades the quality of the data, and is time consuming. This paper describes a new visible/IR imaging spectropolarimeter design based on a novel birefringent fiber-optic image slicer and multiple-slit spectrograph. With this design, simultaneous 3-D imaging spectropolarimetry of astronomical objects with a large field of view and high spatial and spectral resolution can be achieved.