棱镜摄谱仪中紫光谱成像焦距变长的原因

Investigation of longer focus length of violet spectral imaging in prism spectrograph

在使用WPL小型棱镜摄谱仪记录光谱时,紫光成像像距比红光成像像距长.本文使用光学计算软件ZEMAX对小型棱镜摄谱仪光路中各元件的光学参量进行了详细计算,利用系统光具组计算公式,从数值上准确地给出了小型棱镜摄谱仪中紫光成像像距长于红光成像像距的计算结果和详细分析.

While recording spectra by using the WPL miniature prism spectrograph,the image distance of violet light is longer than that of red light.In this paper,ZEMAX,an optical calculation software,was used to calculate the optical parameters of each component in the optical path of the prism spectrograph.Calculation results and detailed analysis of longer violet image distance in the prism spectrograph were also given numerically and accurately by using the calculation formula of optical system.