摘要
利用几何光学原理设计了自由曲面的反光杯和菲涅耳透镜模型,小角度光线通过菲涅耳透射准直,大角度光线通过反光杯准直。使用Matlab软件计算出初始结构参数,利用三维建模工具软件进行曲面拟合并建立几何模型。将几何模型导入TracePro软件进行优化模拟照明。光源采用发光面积1 mm×1 mm的LED芯片,视角为160°。结论:透反式准直器极大提高了光能利用率,不考虑材料吸收等损耗,准直器传输效率约为90%;准直性能与预期相符,半光强角度小于3°。该设计结构紧凑,准直效果良好。
Based on the geometrical optics,reflector-free and fresnel lens model have been designed. In this collimator, the small-angle light was collimated by the Fresnel transmission, while the wide-angle light was collimated by the reflector. Matlab software was used to calculate the initial structure parameter and 3D modeling software tool was used to build a geometric model. Finally, TracePro optical software was adopted to give an imitation and simulation. LED with alambertian light emitting surface of 1 mm×1 mm and a viewing angle of 160 degrees was applied as the light source. This collimator greatly improved the energy efficiency and the half-intensity angle of less than 3 degrees. Without considering the material absorption loss, collimator transmission efficiency is appoximately 90%. In conclusion, this system is very compact and have a good collimation effect.
出处
《实验室研究与探索》
CAS
北大核心
2012年第1期9-11,110,共4页
Research and Exploration In Laboratory
基金
国家自然科学青年基金资助项目(60908041)
中央高校基本科研业务费专项资金资助(JUSRP31005)
