紫外光固化LED线光源的光学系统设计及仿真

孔晓慧; 白廷柱; 杨雅丽

doi:doi:10.3788/aos201333.0222002

光学学报, 2013, 33 (2): 0222002, 网络出版: 2012-12-05

紫外光固化LED线光源的光学系统设计及仿真

Optical System Design and Simulation of LED Line Source for Ultraviolet Curing

论文大纲

孔晓慧 ^*白廷柱杨雅丽

作者单位

北京理工大学光电成像技术与系统教育部重点实验室, 北京 100081

光学设计紫外光固化线聚焦菲涅耳透镜 optical design ultraviolet curing line-focusing Fresnel lens

摘要

针对紫外光固化技术领域中365 nm紫外LED光源进行了应用研究，提出了用菲涅耳透镜替代传统的柱透镜实现光源线聚焦的技术方案，给出了设计过程与仿真结果。从已有的平板菲涅耳透镜的结构设计公式出发，推导了在透镜通光孔径、焦距范围已知的情况下，平板基底厚度、焦距等参数的确定依据，设计出了相应的点聚焦和线聚焦菲涅耳透镜，组成紫外光固化LED线光源的光学系统。运用Tracepro软件建立了菲涅耳透镜系统模型和柱透镜系统模型，通过光线追迹分析了能量利用率、辐照度均匀性等重要指标。仿真结果表明：采用菲涅耳透镜的光学系统可以实现应用目标面上的光学技术指标，提高了能量利用率及辐照度均匀性。

Abstract

An application research on 365 nm ultraviolet LED used in the field of ultraviolet curing is performed, and a technical method using Fresnel lens to replace traditional cylindrical lens is suggested to realize line focusing of the light source. The design process and simulation results are provided. Based on foregone flat Fresnel lens design formulae, determination basis of fundus thickness and focus with known clear aperture diameter and focus range is deduced. The optical system includes point-focusing Fresnel lens and line-focusing Fresnel lens. The models of Fresnel lens optical system and cylindrical lens optical system are established with a tracepro software. Important indexes including energy utilization efficiency and irradiance uniformity are analyzed with ray tracing. Simulation results show that the optical system using Fresnel lens can reach the optical technological indexes on the target plane and provide higher energy utilization efficiency and irradiance uniformity.

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孔晓慧, 白廷柱, 杨雅丽. 紫外光固化LED线光源的光学系统设计及仿真[J]. 光学学报, 2013, 33(2): 0222002. Kong Xiaohui, Bai Tingzhu, Yang Yali. Optical System Design and Simulation of LED Line Source for Ultraviolet Curing[J]. Acta Optica Sinica, 2013, 33(2): 0222002.

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