朗奇光栅法检测自由曲面镜片光焦度

摘要

随着以渐进多焦镜片为代表的自由曲面加工技术的出现,传统的光焦度计已经不能满足对于这些镜片的光焦度测量.本文给出了采用朗奇光栅法检测自由曲面眼镜片光焦度的光路结构,并详细介绍了其测量原理.通过光线追迹,对该方法进行了模拟仿真,分析了核心器件朗奇光栅的间距对于测量精度的影响.%With the development of freeform ophthalmic lenses, especially the appearance of ophthalmic lenses, the traditional optical power meter can't satisfy the optical power measurement requirements. In this paper, the principle and optical structure of freeform Lens power map measurement based on Ronchi test techniques is introduced. The simulation is made by using ray trace to analyze the measure accuracy change with Ronchi grating pitch.