基于由照射目标向光源映射和微带表面构型的分离变量三维自由曲面非成像光学系统设计  

Variable-separation three dimensional freeform nonimaging optical system design based on target-to-source mapping and micro belt surface construction

作　　者：韩彦军[1] 张贤鹏[1] 冯泽心[1] 钱可元[2] 李洪涛[1] 罗毅[1,2] 李旭亮 黄冠志[3] 祝炳忠 

机构地区：[1]清华大学电子工程系集成光电子学国家重点实验室/清华信息科学与技术国家实验室,北京100084 [2]清华大学深圳研究生院半导体照明实验室,广东深圳518055 [3]东莞勤上光电股份有限公司,广东东莞523565

出　　处：《中国科技论文在线》2010年第1期35-40,共6页

基　　金：国家自然科学基金(60536020;60390074);国家重点基础研究发展计划(973计划)(2006CB302801;2006CB302804;2006CB302806;2006CB921106);国家高技术研究发展计划(863计划)(2008AA03A194);北京市自然科学基金重点项目(4091001);深圳市产学研和公共科技专项资助项目(08CXY-14)

摘　　要：为了使以发光二极管为代表的光源在照射目标平面上获得高分辨率的并具有复杂预定形状的远场照度分布,提出了从照射目标平面向光源映射、基于微带表面构型的分离变量三维自由曲面非成像光学系统设计方法。首先,计算依赖于映射关系的表面法向矢量;其次,逐步计算网格格点和表面微带的边缘曲线形状;最后,将所有表面微带联结在一起构成光学系统的表面。该设计方法具有无需误差校正过程,可以高效设计具有复杂照度分布形状的光学系统等独特优势。高分辨率光线追踪模拟结果表明,对于照射目标平面上的棋盘状和条状等多种预定照度分布形状,应用该方法均可高效地获得精准的非成像光学系统。To obtain complicated prescribed far-field irradiance distribution pattern with high resolution on the target plane,a variable-separation three dimensional freeform nonimaging optical system design based on a novel target-to-source mapping strategy and micro belt surface construction for light sources such as Light emitting diodes was described.First,the surface normal vectors depending on the mapped correspondence were calculated.Then,the grid points and boundary curves of surface micro belts were calculated step by step.Finally,the refractive optical surface covering those microbelts was constructed.This method has advantages such as elimination of the error correction process and high efficiency in designing nonimaging optical system with complicated irradiation distribution pattern.High resolution ray-tracing simulation results showed that optical systems with different prescribed irradiance distribution patterns such as chessboard-like square and stripe form on target plane could be efficiently achieved by using this algorithm.

关 键 词：光电子学与激光技术 非成像光学系统设计 发光二极管 分离变量 目标到光源映射策略 微带表面构型 

分 类 号：TH74[机械工程—光学工程]