平行双转镜傅里叶变换光谱仪

发布时间：2019-08-09 20:56

【摘要】：在时间调制傅里叶变换光谱仪中,直线运动型动镜很难精确驱动,容易引起倾斜和剪切的问题。旋转型动镜可以解决该类问题。介绍了一种转镜式傅里叶变换光谱仪方案,并对其进行了原理分析和光程差公式推导,提出了工程设计约束条件。该光谱仪由一个分束器,两个固定平面镜,两面平行固定在一个转轴上旋转的平面反射镜,前置镜,后置镜及探测器组成。通过原理介绍得出,该光谱仪结构简单,两条分光光线经同一平面镜反射后干涉,使仪器更容易装调;通过光程差推算得出,该光谱仪容易实现大光程差,光谱分辨率高;通过工程设计约束及仿真分析得出,该光谱仪需要在高速旋转的条件下实现高分辨率采样,容易实现精确运动控制,稳定性好,测量速度快。
[Abstract]:In the time-modulation Fourier transform spectrometer, the linear moving mirror is difficult to drive accurately, and it is easy to cause the problem of tilt and shear. Rotating mirror can solve this kind of problem. This paper introduces a scheme of rotating mirror Fourier transform spectrometer, analyzes its principle and deduces the formula of optical path difference, and puts forward the constraint conditions of engineering design. The spectrometer consists of a beam splitter, two fixed plane mirrors, two planar mirrors rotated parallel to a rotating axis, a front mirror, a rear mirror and a detector. The principle of the spectrometer is introduced, and the structure of the spectrometer is simple, and the interference of the two splitter rays through the same plane mirror makes the instrument easier to install and adjust, and it is easy to realize the large optical path difference and high spectral resolution by calculating the optical path difference. Through engineering design constraints and simulation analysis, it is concluded that the spectrometer needs to achieve high resolution sampling under the condition of high speed rotation, which is easy to achieve accurate motion control, good stability and fast measurement speed.
【作者单位】：西安电子科技大学;中国科学院光电研究院;中国科学技术大学;
【基金】：国家杰出青年科学基金项目(61225024)资助
【分类号】：TH744.1

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