用于LED光源的具有均匀照度的紧凑平滑自由曲面光学系统设计。

Design of compact and smooth free-form optical system with uniform illuminance for LED source.

作者信息

Luo Yi, Feng Zexin, Han Yanjun, Li Hongtao

机构信息

State Key Lab on Integrated Optoelectronics/Tsinghua National Lab on Information Science and Technology, Department of Electronic Engineering, Tsinghua University, Beijing, 100084, P. R. China.

出版信息

Opt Express. 2010 Apr 26;18(9):9055-63. doi: 10.1364/OE.18.009055.

DOI:10.1364/OE.18.009055

PMID:20588752

Abstract

A feedback modification method based on variable separation mapping is proposed in the design of free-form optical system with uniform illuminance for LED source. In this method, the non-negligible size of LED source is taken into account, and a smooth optical system is established with single freeform surface regenerated by adding feedback to the lens design for a point light source. More rounds of feedback can improve the lens performance. As an example, a smooth free-form lens with rectangular illuminance distribution is designed, and the illuminance uniformity is improved from 18.75% to 81.08% after eight times feedback.

摘要

在用于LED光源的具有均匀照度的自由曲面光学系统设计中，提出了一种基于变量分离映射的反馈修正方法。在该方法中，考虑了不可忽略的LED光源尺寸，并通过对针对点光源的透镜设计添加反馈来生成单个自由曲面，从而建立了一个平滑的光学系统。更多轮次的反馈可以提高透镜性能。例如，设计了一个具有矩形照度分布的平滑自由曲面透镜，经过八次反馈后，照度均匀性从18.75%提高到了81.08%。