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Cascaded interferometric imaging spectrometer

机译：级联干涉成像光谱仪

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摘要

We present what we believe to be a novel method for order sorting a Fabry-Perot interferometer usinga Fourier transform spectrometer (FTS) in tandem. We demonstrate how the order sorting is achieved using a model instrument response as an example of an instrument working in the 5-25 (mu)m band, although the method is generally applicable at all wavelengths. We show that an instrument of this type can be realized with a large bandwidth, a large field of view, and good transmission efficiency. These attributes make this instrument concept a useful technique in applications where true imaging spectroscopy is required, such as mapping large astronomical sources. We compare the performance of the new instrument to grating and standard FTS instruments in circumstances where the measurement is background and detector noise limited. We use a figure of merit based on the field of view and speed of detection and find that the new system has a speed advantage over a FTS with the same field of view in all circumstances. The instrument will be faster than a grating instrument with the same spectral resolution once the field of view is >13 times larger under high background conditions and >50 times larger with detector performances that match the photon noise from Zodiacal light.
机译：我们提出了我们认为是一种新颖的方法，用于对使用傅里叶变换光谱仪（FTS）串联进行的Fabry-Perot干涉仪进行排序。我们演示了如何使用模型仪器响应作为在5-25μm波段中工作的仪器的示例来实现订单排序，尽管该方法通常适用于所有波长。我们证明了这种仪器可以实现大带宽，大视野和良好的传输效率。这些属性使该仪器概念成为需要真实成像光谱的应用（例如，绘制大型天文源）的有用技术。在测量受背景和探测器噪声限制的情况下，我们将新仪器与光栅仪器和标准FTS仪器的性能进行了比较。我们使用基于视场和检测速度的品质因数，发现在所有情况下，新系统都比具有相同视场的FTS具有速度优势。一旦在高背景条件下视场大于13倍，并且其探测器性能与黄道光的光子噪声相匹配，则该仪器将比具有相同光谱分辨率的光栅仪器更快，而其视野则大于50倍。

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