静态傅里叶变换光谱仪补偿板的旋转对干涉图谱的调制研究  

Study on Interferogram-Spectrum Modulation by the Rotation of Compensation Plate in Static Fourier Transform Spectrometer

作　　者：吕金光[1] 梁静秋[1] 梁中翥[1] 秦余欣[1] 田超[1] 

机构地区：[1]中国科学院长春光学精密机械与物理研究所应用光学国家重点实验室,吉林长春130033

出　　处：《光学学报》2015年第11期307-314,共8页Acta Optica Sinica

基　　金：国家自然科学基金(61376122;61027010;60977062);国家863计划(2009AA04Z315);吉林省科技发展计划(20130206010GX;201205025;20150520101JH;20150204072GX);长春市科技计划(2011131;2013261)

摘　　要：在静态傅里叶变换光谱仪中,由于系统装调精度的限制,补偿板相对于分束板会产生一定角度的旋转。补偿板的旋转在横向会导致干涉图像发生错位,在纵向则会导致光程差的改变,致使干涉图像失真。通过对光束在补偿板中传播路径的计算,得到干涉图像的错位量和光程差的变化量与补偿板旋转角之间的函数关系,并根据函数关系计算和分析了补偿板的旋转导致的不同波长干涉图像的混叠和光谱的失真。对于补偿板旋转引入的相位误差,提出离散光谱序列解线性方程组的方法,有效实现了误差光谱的良好校正。Due to the restriction of systemica lignment precision in static Fourier transform spectrometer, the compensation plate may produce a definite rotation angle relative to beam splitter.The rotation of the compensation plate makes the interferogram dislocation and the optical path difference change, and then induces the interferogram image distortion. By means of the calculation to the propagation path of beam in compensation plate, the relationship between interferogram dislocation and optical path difference change and rotation angle of compensation plate is gained, and according to which, the aliasing of interferogram images from various wavelengths aliasing and the spectrum distortion are simulated and analyzed. Toward the phase error introduced by rotation of compensation plate, arithmetic of resolving the linear equation by discrete spectrum sequence is brought forward, the result indicates that the error spectrum can be corrected effectively.

关 键 词：光谱学 傅里叶变换光谱仪 调制 补偿板 旋转角 

分 类 号：O433.1[机械工程—光学工程]