A lens-based Raman spectrometer is characterized by studying the optical elements in the optical path and we study the measure of aberration/diffraction effects. This is achieved by measuring the spectral resolution (SR) thus encompassing almost all optical elements of a spectrometer that are mostly responsible for such effects. An equation for SR is used to determine the quality factor Q which measures aberration/diffraction effects occurring in a spectrometer. We show how the quality factor changes with different spectrometer parameters such as grating groove density, the wavelength of excitation, pinhole width, CCD pixel density, etc. This work provides an insight into the quality of a spectrometer and helps to monitor the performance of the spectrometer over a certain period. Commercially available spectrometers or home-built spectrometers are prone to misalignment in optical elements and can benefit from this work that allows maintaining the overall quality of the setup. Performing such experiments over a period helps to minimize the aberration/diffraction effects occurring as a result of time and maintaining the quality of measurements.

基于透镜的拉曼光谱仪的特点是研究光路中的光学元件，我们研究像差/衍射效应的测量。这是通过测量光谱分辨率 (SR) 来实现的，因此几乎涵盖了光谱仪的几乎所有光学元件，这些光学元件主要负责这种效应。SR 方程用于确定测量光谱仪中出现的像差/衍射效应的品质因数 Q。我们展示了品质因数如何随不同光谱仪参数（例如光栅凹槽密度、激发波长、针孔宽度、CCD 像素密度等）而变化。这项工作提供了对光谱仪质量的洞察，并有助于监测光谱仪的性能光谱仪在一定时期内。市售光谱仪或自制光谱仪容易出现光学元件未对准的问题，并且可以从这项工作中受益，从而保持设置的整体质量。在一段时间内执行此类实验有助于最大限度地减少由于时间而发生的像差/衍射效应并保持测量质量。