We present the design, construction, and first spectra of a step-scan Michelson Fourier-transform spectrometer for optical emission spectroscopy in the UV-VIS spectral range. The mirror motion mechanism is based on a long-travel piezo-based linear translation stage with built-in position feedback. The step-scan arrangement allows for signal integration, making the instrument suitable for measurements of less intensive radiation sources and for the photon-counting technique. The spectrometer consists of two coupled Michelson interferometers, one for the spectrometer itself and the other to provide positional reference for the mirror stepping mechanism using interference fringes of a stabilized 635 nm laser diode. Using interpolation of the laser interferogram and taking advantage of the translation stage precision in linear-piezo mode, the mechanism is capable of performing 79 nm steps, which puts the Nyquist wavelength at ∼320 nm. The spectrometer was tested by measuring the spectra of HgAr cold-cathode fluorescent lamp and electron-induced fluorescence of ambient air. Two different detectors were used, an amplified photodiode detector and a photomultiplier tube module in photon counting mode. The highest achieved experimental spectral resolving power was ∼4000 using 1 mm of total mirror travel and the highest achieved noise-free dynamic range was 103. Test results show that the instrument is suitable for use with moderate-to-low intensity signal sources such as small gas discharges and spectroscopic measurements at astronomical telescopes.

中文翻译：

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步进扫描迈克尔逊傅里叶变换光谱仪，用于紫外-可见光谱范围内的光发射光谱

我们介绍了用于 UV-VIS 光谱范围内的光发射光谱的步进扫描迈克尔逊傅立叶变换光谱仪的设计、构造和第一个光谱。镜面运动机制基于长行程压电线性平移台，内置位置反馈。步进扫描布置允许信号集成，使该仪器适用于测量强度较低的辐射源和光子计数技术。光谱仪由两个耦合迈克尔逊干涉仪组成，一个用于光谱仪本身，另一个用于使用稳定的 635 nm 激光二极管的干涉条纹为镜面步进机制提供位置参考。使用激光干涉图的插值并利用线性压电模式下的平移台精度，该机制能够执行 79 nm 的步长，这使得奈奎斯特波长为 320 nm。该光谱仪通过测量HgAr冷阴极荧光灯的光谱和环境空气的电子诱导荧光进行测试。使用了两种不同的检测器，放大的光电二极管检测器和处于光子计数模式的光电倍增管模块。使用 1 mm 总反射镜行程获得的最高实验光谱分辨率为 ~4000，获得的最高无噪声动态范围为 103。测试结果表明，该仪器适用于中低强度信号源，例如天文望远镜的小气体放电和光谱测量。该光谱仪通过测量HgAr冷阴极荧光灯的光谱和环境空气的电子诱导荧光进行测试。使用了两种不同的检测器，放大的光电二极管检测器和处于光子计数模式的光电倍增管模块。使用 1 mm 总反射镜行程获得的最高实验光谱分辨率为 ~4000，获得的最高无噪声动态范围为 103。测试结果表明，该仪器适用于中低强度信号源，例如天文望远镜的小气体放电和光谱测量。该光谱仪通过测量HgAr冷阴极荧光灯的光谱和环境空气的电子诱导荧光进行测试。使用了两种不同的检测器，放大的光电二极管检测器和处于光子计数模式的光电倍增管模块。使用 1 mm 总反射镜行程获得的最高实验光谱分辨率为 ~4000，获得的最高无噪声动态范围为 103。测试结果表明，该仪器适用于中低强度信号源，例如天文望远镜的小气体放电和光谱测量。