Numerical Simulation Analysis of Portable High-Speed FTIR Rotary Interferometers

被引:0
|
作者
Qu L. [1 ,2 ,3 ]
Xu L. [1 ]
Liu J. [1 ]
Feng M. [4 ]
Liu W. [1 ]
Xu H. [1 ]
Jin L. [1 ]
机构
[1] Key Laboratory of Environmental Optics and Technology, Anhui Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Hefei
[2] University of Science and Technology of China, Hefei
[3] School of Physics and Electronic Information, Anhui Normal University, Wuhu
[4] School of Mechanical and Electrical Engineering, Chuzhou University, Chuzhou
来源
Guangxue Xuebao/Acta Optica Sinica | 2021年 / 41卷 / 09期
关键词
Fourier optics; Geometrical optics; Numerical analysis; Optical path difference; Portable Fourier infrared spectrometer;
D O I
10.3788/AOS202141.0907001
中图分类号
学科分类号
摘要
Rotary interferometers enable the miniaturization of portable Fourier infrared spectrometers and provide high-speed spectral output. However, their optical path difference (OPD) is nonlinear. In this paper, we analyzed the structure of a portable Fourier-transform infrared spectroscopy (FTIR) rotary interferometer in detail and built a reference coordinate system. Then, an OPD equation for the rotating mirror was deduced according to the geometrical optics principle. Numerical simulation analysis was carried out to illustrate the relationship of OPD with the thickness, refractive index, and rotation angle of the rotating mirror. In terms of sampling without reference laser, the nonlinear relation between OPD and rotation angle was fitted by polynomials to obtain the time non-uniformity corresponding to equal OPD. As a result, the sampling with equal OPD in the case of non-equal time was achieved. Compared with that of the equal-time sampling, the instability of OPD velocity was reduced to 1/5.3, which offered a greater instability margin for the speed control of the rotating mirror and also improved the vibration resistance of FTIR rotary interferometers. Our work provides data support and theoretical basis for the design parameter determination and optimization of portable high-speed FTIR rotary interferometers without reference laser. © 2021, Chinese Lasers Press. All right reserved.
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  • [1] Liu L X, Mandelis A, Huan H T, Et al., Fourier-transform infrared differential photoacoustic spectroscopy (FTIR-DPAS) for simultaneous monitoring of multiple air contaminants/trace gases, International Journal of Thermophysics, 39, 8, pp. 1-7, (2018)
  • [2] de Ninno A, Nikollari E, Missori M, Et al., Dielectric permittivity of aqueous solutions of electrolytes probed by THz time-domain and FTIR spectroscopy, Physics Letters A, 384, 34, (2020)
  • [3] Liu W Q, Chen Z Y, Liu J G, Et al., Advances with respect to the environmental spectroscopy monitoring technology, Acta Optica Sinica, 40, 5, (2020)
  • [4] Fiocco G, Invernizzi C, Grassi S, Et al., Reflection FTIR spectroscopy for the study of historical bowed string instruments: invasive and non-invasive approaches, Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy, 245, (2021)
  • [5] Liu W Q, Chen Z Y, Liu J G, Et al., On-line monitoring technology and applications for air pollution and environmental safety, Journal of Atmospheric and Environmental Optics, 10, 2, pp. 82-92, (2015)
  • [6] Zhao B W, Xiangli B, Cai Q S, Et al., Fourier transform spectrometer based on rotating parallel-mirror-pair, Spectroscopy and Spectral Analysis, 35, 11, pp. 3209-3213, (2015)
  • [7] Cai Q S, Xiangli B, Fang Y, Et al., Principle and tolerance analysis of a rotating parallel-mirror-pair spectrometer, Acta Photonica Sinica, 45, 5, (2016)
  • [8] Feng M C, Liu W Q, Xu L, Et al., Optical path difference analysis and simulation of four typical rotary type interferometer, Spectroscopy and Spectral Analysis, 35, 11, pp. 3214-3219, (2015)
  • [9] Xie Y T, Zhang Y J., OPD scanning model of the swing arm interferometer and its simulation, Laser & Infrared, 45, 7, pp. 821-824, (2015)
  • [10] Dybwad J P., Refractively scanned interferometer