Oriana Aurelio, Réhault Julien, Preda Fabrizio, Polli Dario, Cerullo Giulio
J Opt Soc Am A Opt Image Sci Vis. 2016 Jul 1;33(7):1415-20. doi: 10.1364/JOSAA.33.001415.
We introduce a spectrometer capable of measuring sample absorption spectra in the visible regime, based on a time-domain scanning Fourier transform (FT) approach. While infrared FT spectrometers typically employ a Michelson interferometer to create the two delayed light replicas, the proposed apparatus exploits a compact common-mode passive interferometer that relies on the use of birefringent wedges. This ensures excellent path-length stability (∼λ/300) and accuracy, with no need for active feedback or beam tracking. We demonstrate the robustness of the technique measuring the transmission spectrum of a colored bandpass filter over one octave of bandwidth and compare the results with those obtained with a commercial spectrophotometer.
我们介绍一种基于时域扫描傅里叶变换（FT）方法的光谱仪，它能够在可见光范围内测量样品的吸收光谱。虽然红外傅里叶变换光谱仪通常采用迈克尔逊干涉仪来产生两个延迟的光复制品，但本文所提出的仪器利用了一种紧凑的共模无源干涉仪，该干涉仪依赖于双折射楔的使用。这确保了出色的光程稳定性（约为λ/300）和精度，无需主动反馈或光束跟踪。我们展示了该技术在一个倍频程带宽内测量彩色带通滤波器透射光谱的稳健性，并将结果与使用商用分光光度计获得的结果进行比较。
