数字式摄影验光仪的原理分析和数字模拟  

Analysis of Principle of Digital Potorefraction Instrument and Its Digital Simulation

作　　者：许陇云[1] 李湘宁[1] 陈家璧[1] 郭小爱[1] 

机构地区：[1]上海理工大学,上海200093

出　　处：《仪器仪表学报》2002年第2期135-140,共6页Chinese Journal of Scientific Instrument

基　　金：上海市高等学校科学技术发展基金 (99K0 6)项目

摘　　要：本文分析了数字式摄影验光仪的光学原理 ,探讨了明暗过渡区的生成机理 ,对近视眼眼瞳像进行了数字模拟和实验比较 。The optical principle of the digital photorefraction instrument was analyzed and the mechanism how to form the transition region from brightness to shade was discussed.Digital simulation and experiment comparison for pupil images of myopia were done.Furthermore,it has been discussed that the vertical coordinates of upper edge of shade region in pupil image were replaced in the oxyopter equation by the abscissa of inflexion of light intensity curve.

关 键 词：数字式摄影验光仪 偏心摄影验光 照度分布 计算机模拟 

分 类 号：TH786[机械工程—仪器科学与技术]