摘要
为解决LED作为朗伯光源难以直接应用的问题,运用非成像光学设计理论,提出一种面向大功率LED的准直系统设计方法,采用折射-反射-折射式(RXR)的光学系统对LED大角度范围内的出射光收集并准直,得到较小发散角度的准直光束。首先利用光学扩展量守恒定律、边缘光学原理以及同步多曲面(SMS)设计方法计算系统轮廓曲线上点的坐标,然后在SolidWorks中对坐标点进行拟合得到轮廓曲线,进而得到整个系统模型及适合数控加工的面型数据,其出光口径为50mm。借助光学仿真软件TracePro进行模拟,发现光束发散半角在±1.3°左右,能量利用率在90%以上。结果表明,用该种方法设计的准直系统结构简单,体积小,便于应用,有效实现对LED出射光的收集和准直。
Based on non-imaging optics design theory, a novel method of designing collimator system for high power LED is proposed to solve the problem which is difficult to be directly applied for LED as a Lambertian. An optical system with refractive-reflective-refractive is chosen to collect and collimate a wide angle range light to emit a collimating beam with a small divergence angle. First, points on curves of the system were calculated according to the extended conservation law, the edge-ray principle and Simultaneous Multiple Surface （SMS） method. Then, Profile curves are obtained by curve fitting with these points in SolidWorks, and furthermore the collimator system with 20ram diameter and data of the surface profiles for NC manufacture are finished. Simulating this model by using TracePro, the half beam angle of the obtained collimating beam is almost ＋ 1.3~, and the light energy utilization rate is higher than 90%. The results demonstrate that, with this method, the collimator system has advantages in a simple structure, small size, and is easy to use. It is most important that it can efficiently collect and collimate the light.
出处
《照明工程学报》
2013年第1期70-73,80,共5页
China Illuminating Engineering Journal
基金
广东省教育部产学研合作专项资金(No.2010B090400481)
广东省战略性新兴产业专项资金LED产业项目(2012A080304003)
