基于全息光学元件的光纤光谱仪的光路设计

发布时间：2019-06-28 09:09

【摘要】：基于全息光学理论分析了全息光学元件的高斯成像性质,包括光焦度、成像位置、衍射效率以及作为光纤光谱仪光栅元件的可行性,并以全息光栅的成像理论以及光谱仪工作原理为基础,设计了光谱仪器光学系统的各个参数,通过Zemax软件的仿真、像质评价及优化,得出最终的参数和模拟结果。所使用的全息光栅记录波长为575nm,记录光束之间的夹角为10°,一束为平面波,一束为球面波,焦距40mm,使用+1级衍射光,光栅孔径为10mm。光谱仪的工作波长范围为400nm~800nm,体积140mm*30mm*40mm,谱面展宽29.1mm。通过在光学平台上搭建光路,利用已研发完成的电路系统及光谱仪软件,针对汞灯光谱进行了试验,光谱分辨率优于8nm,测量得到的汞灯光谱与标准汞灯光谱一致,表明了所设计的基于全息元件的光纤光谱仪光学系统是可行的。
[Abstract]:Based on holographic optics theory, the Gaussian imaging properties of holographic optical elements, including focal degree, imaging position, diffraction efficiency and feasibility as fiber spectrometer grating elements, are analyzed. Based on the imaging theory of holographic gratings and the working principle of spectrometer, the parameters of the optical system of spectral instruments are designed. Through the simulation, image quality evaluation and optimization of Zemax software, the final parameters and simulation results are obtained. The recording wavelength of the holographic grating is 575nm, the angle between the recorded beams is 10 掳, one is a plane wave, the other is a spherical wave, and the focal length is 40mm. The aperture of the grating is 10mm when the first order diffraction light is used. The working wavelength range of the spectrometer is 400 nm 鈮，

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