可调谐法布里—珀罗干涉光谱成像关键技术研究

发布时间：2018-06-04 20:42

本文选题：光谱成像 + 法布里-珀罗干涉　；参考：《南京理工大学》2015年硕士论文

【摘要】：近年来,随着科学技术的迅猛发展,成像光谱技术的应用越来越广泛,已经从航天航空探测、目标反伪装等军事方面,向民用应用延伸。为满足应用要求,成像光谱仪向高空间分辨率、小型化方向发展。因此,本文以研制可调谐法布里-珀罗干涉仪样机为题,对三个关键技术进行研究,即法布里-珀罗干涉腔推扫结构设计、动镜偏摆对复原光谱分辨率的影响以及光谱复原方法。针对法布里-珀罗干涉腔结构设计,为提高最大位移量以增加光谱分辨率,设计一种基于柔性铰链技术的三角形微位移放大结构。通过建立数学模型,得到放大结构的系统位移放大率,并采用有限元仿真进行验证。建立动镜偏摆与获取的干涉信号的模型,根据干涉成像光谱理论,得到理论光谱分辨率,并建立数学模型,针对不同情况的倾斜量进行讨论,计算倾斜量对光谱分辨率的影响。采用基于相移干涉技术的检测方法,对不同光程差下的干涉条纹图进行采集,提取其中的相位信息,得到法布里-珀罗干涉腔动镜的倾斜量。针对可调谐法布里-珀罗干涉仪的光谱复原,建立基于低反射率透镜的法布里-珀罗干涉腔模型,推导出利用傅里叶变换的光谱复原方法。最后,利用非接触式高精度电容传感器对可调谐法布里-珀罗干涉腔推扫结构进行检测,满足设计要求。装调实验系统,完成对激光光源以及日光灯光源的干涉条纹图的光谱复原。
[Abstract]:In recent years, with the rapid development of science and technology, imaging spectrum technology has been applied more and more widely, which has been extended to civilian applications from military aspects such as aerospace detection, target anti-camouflage and so on. In order to meet the requirements of application, the imaging spectrometer develops towards high spatial resolution and miniaturization. Therefore, three key techniques are studied in this paper, namely, the design of push-sweep structure of Fabry-Perot interference cavity, which is based on the development of a prototype of tunable Fabry-Perot interferometer. The effect of dynamic mirror pendulum on the spectral resolution and the method of spectral restoration. Aiming at the design of Fabry-Perot interference cavity structure, a triangular micro-displacement amplification structure based on flexure hinge technology is designed to increase the maximum displacement and spectral resolution. The system displacement magnification of the amplified structure is obtained by establishing the mathematical model, and the finite element simulation is used to verify it. Based on the theory of interference imaging spectrum, the theoretical spectral resolution is obtained, and the mathematical model is established. The influence of tilt on spectral resolution is calculated. Based on phase shift interferometry, the interference fringes under different optical path differences were collected, the phase information was extracted, and the tilt of Fabry-Perot interferometer was obtained. For spectral restoration of tunable Fabry-Perot interferometer, a Fabry-Perot interference cavity model based on low reflectivity lens is established, and a spectral restoration method using Fourier transform is derived. Finally, the tunable Fabry-Perot interference cavity push-sweep structure is detected by non-contact high-precision capacitive sensor to meet the design requirements. The spectral restoration of interference fringes of laser light source and fluorescent light source is completed with the installation experiment system.
【学位授予单位】：南京理工大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TH744.3

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