物镜像面相对照度计算方法  

Calculation Method of Relative Illumination of Lens Image Plane

作　　者：陈琛[1,2] 胡春海[1] 李维善 刘宵婵 宋涛[1,2] 

机构地区：[1]燕山大学测试计量技术及仪器河北省重点实验室,河北秦皇岛066004 [2]秦皇岛视听机械研究所数字影像装备与数字视频技术秦皇岛重点实验室,河北秦皇岛066000

出　　处：《光学学报》2016年第11期91-103,共13页Acta Optica Sinica

基　　金：科技部科研院所技术开发研究专项基金(2011EG119199);科技部中小企业科技创新基金(10C26211303678)

摘　　要：为了找到更加精确的广角物镜系统像面相对照度计算方法,分析了现行像面照度公式成立条件的局限性,提出了基于孔径光阑约束模式的矢量光线追迹计算光通量的方法。通过矢量分析和推导,给出了孔径光阑约束的轴外视场光束在第一光学面上形成的照射区的特征点坐标及照射区面积表达式;依据朗伯体辐射条件和规律,从物镜系统物方着手,建立了两种共轭条件的物镜像面照度分析模型;针对具有物方大视场角特征的相似成像物镜系统和非相似成像物镜系统,分别推导出了像面照度及相对照度表达式;指出了光学设计过程中提高像面相对照度的基本策略。In order to find a more accurate calculation method of relative illumination of lens image plane in a wideangle lens system,the limitation of the existing calculation method is analyzed,and a method to calculate luminous flux by vector ray tracing based on aperture stop constraint mode is introduced.The expressions of feature points coordinates and illuminated area of the first optical surface from abaxial ray under the control of aperture stop are presented through vector analysis and derivation.According to the condition and the law of Lambert radiator,from object space of lens,two kinds of lens image illumination analysis modes under conjugated condition are set up.For similar imaging system and non-similar imaging system with large field,the expressions of image illumination and relative illumination are derived respectively.A basic scheme to increase relative illumination during optical designing is proposed.

关 键 词：几何光学 相对照度 空间光线 广角物镜 鱼眼物镜 孔径光阑 

分 类 号：TH701[机械工程—仪器科学与技术] TH741.5[机械工程—精密仪器及机械]