微型光谱仪结构参量的可调节冗余量研究

为了探究Czerny-Turner(CT)光路结构在装配过程中各个光学元件偏离理论光学设计参量时对光谱仪光学性能的影响,建立数学物理模型还原Zemax设计的非对称CT结构光路,在不影响光谱仪分辨率的条件下,调节CT结构中的各元件,得到各元件的可调节冗余量.结果表明,准直镜和衍射光栅偏转角度可调节范围分别为±0.19°和±0.17°;聚光镜和CCD的位置可调节范围都为±0.12mm.以上四个变量的可调节冗余量最小,对光谱仪最终分辨率影响较大.该研究对CT结构中各光学元件机械调节机构的设计具有参考意义.

Adjustable Redundancy of the Micro Spectrometer Structure Parameter

In order to investigate the influence of the optical elements of Czerny-Turner (CT) optical path structure on the optical properties of the spectrometer when the optical elements are deviated from the theoretical design parameters, the mathematical model was established to successfully restore the asymmetric CT optical path structure designed by Zemax, under the condition of unaffecting the spectrometer resolution, the components of adjustable redundancy was got.The results show that the adjustable range of the deflection angle of the collimating mirror and the diffraction grating is ±0.19 and ±0.17 degrees, and the adjustable range of the condenser and the CCD is ±0.12 mm.The adjustable range of the above four variables is the smallest, which has a great influence on the final resolution of the spectrometer.The research provides the references for the mechanical adjustment mechanism of each optical element in CT structure.