Secondary Optical Design for Light Emitting Diodes Lens with Wide Range and High Uniformity Illumination

提出了一种新的、利于实施计算的实现大范围均匀照明的LED灯具透镜设计方法。基于能量守恒定理和光线折射Snell定理,通过Matlab编程计算出自由曲面透镜坐标点。借助CAD软件和光学模拟软件Tracepro,模拟了自由曲面透镜的具体应用,在光源高为3m,接收面直径为10m的圆形照明区域,得到了均匀度达80%以上的照度分布,该设计可以应用在商场、工厂等室内照明灯具上。Proposed is a new and accessible method to design LED free-form lens with wide range and high uniformity illumination. Based on the energy conservation law and light refraction Shell＇s law, free-form lens are calculated by the Matlab programming. CAD software is used to compose the solid model of free-form lens. With optical simulation software Tracepro, ray tracing is used to verify the secondary optical design with the height of lighting source as 3 m and the diameter of circular receiving surface as 10 m. The illumination uniformity higher than 80% is realized.国家“973”计划项目中文核心期刊要目总览(PKU)中国科技核心期刊(ISTIC)中国科学引文数据库(CSCD)03334-3373