Köhler Michael H, Naßl Stefan S, Kienle Patrick, Dong Xingchen, Koch Alexander W
Appl Opt. 2019 May 1;58(13):3393-3400. doi: 10.1364/AO.58.003393.
For applications where only moderate spectral resolution is required, static Fourier transform infrared spectrometers (sFTS) offer a comparatively cost-effective alternative to classical scanning instruments. In this paper, we present an sFTS based on a single-mirror interferometer using only standard optical components and an uncooled microbolometer array. Because the instrument features concave mirrors rather than lenses, dispersion effects can be minimized. This enables broadband operation in the mid-infrared range from 2800 cm to 600 cm at a spectral resolution of 12 cm. In addition, the design guarantees comparatively high light throughput and can potentially be designed for increased temperature stability. Alongside a simulation of the temperature- and wavenumber-dependent behavior of the system, we provide a proof of principle of the proposed design by means of experimental results.
对于仅需要中等光谱分辨率的应用，静态傅里叶变换红外光谱仪（sFTS）为传统扫描仪器提供了一种相对经济高效的替代方案。在本文中，我们展示了一种基于单镜干涉仪的sFTS，它仅使用标准光学元件和非制冷微测辐射热计阵列。由于该仪器采用凹面镜而非透镜，色散效应可降至最低。这使得在2800 cm至600 cm的中红外范围内以12 cm的光谱分辨率进行宽带操作成为可能。此外，该设计保证了相对较高的光通量，并且有可能设计用于提高温度稳定性。除了对系统的温度和波数相关行为进行模拟外，我们还通过实验结果提供了所提出设计的原理证明。
