基于反射式平行光管法的紫外透镜焦距测试研究

光学透镜是光学仪器中最基本的器件，而焦距又是光学透镜最重要的特性参数，如何精确测量透镜的焦距一直以来都是研究重点，然而目前鲜有针对紫外透镜焦距测试的研究。本文结合紫外透镜的特点，对一种基于反射式平行光管的紫外透镜焦距测试方法进行了研究，并以此设计出了一套紫外镜头焦距测量系统，同时选用了不同焦距的紫外镜头进行了实验，最后对系统进行了误差分析。实验结果表明，该测量系统可以对紫外镜头焦距进行高精度测量，25 mm镜头的测量误差为2.041%，100 mm镜头的测量误差为0.934%，验证了测量系统的准确性。

Focal Length Measurement of Ultraviolet Lens

Optical lenses are the most basic components in optical instruments; focal length of the optical lens is the most important characteristic parameter, and accurate measurement of the focal length of the optical lens has long been a research focus. However, few studies have been conducted on the UV lens focal length measurement. In this study, a method for measuring the focal length of an ultraviolet lens based on a reflective collimator is investigated, according to the characteristics of the ultraviolet lens, and a few UV lens focal length measurement systems were designed. Different UV lenses were studied, and the focal length of the system was chosen for the measurement error analysis. The experimental results show that the measurement system can measure the focal length of the UV lens with high precision, i.e., the measurement error of 25-mm lens is 2.041%, that of 100-mm lens is 0.934%, which verifies the accuracy of the measuring system.