光盘纹扩散板的微结构设计与制备

Microstructure Design and Preparation of CD Pattern Diffuser

基于LightTools软件分析了光在光盘纹(CD纹)微结构扩散板中的传输过程,采用注塑成型制备工艺进行实测验证,研究扩散板表面的CD纹微结构对光提取效率的影响。通过理论研究、模拟仿真和实验对比,对扩散板表面微结构进行建模和大规模分布式光线追迹。结果表明:在80mm×80mm照明面积范围内,相对于无微结构扩散板,CD纹微结构扩散板的光流明效率有明显提高;当线宽为200μm时,光流明效率提升最多,提高了13.52%。根据最优模拟尺寸制备出由若干同心圆环组成的CD纹微结构扩散板,以LED筒灯为实验灯具,用积分球测量使用微结构扩散板、一般扩散板和不使用扩散板的灯具的总流明输出,得到CD纹微结构扩散板的透光率达90.6%,比一般扩散板的透光率提高了8.8%的结论。

Based on the optical analysis software of LightTools,the transmitting processing of light in CD-pattern microstructure diffuser is analyzed.The injection molding process is used to verify the effect of this model.The effect of CD pattern microstructure on the light extraction efficiency is studied.Through theoretical research,simulation,and experimental comparison,the surface microstructure of the diffuser is modeled and the ray tracing is carried out on a large scale.The results show that,in the 80 mm×80 mm illumination area,the optical lumen efficiency of the CD pattern microstructure diffuser is obviously improved compared with that of the nonmicrostructure diffuser,and the line width of 200μm can increase the optical lumen efficiency by 13.52%.According to the optimal simulation size,a CD pattern microstructure diffuser composed of several concentric rings is prepared,and an 8-inch LED downlight is used as the test luminaire.The total lumen output of the microstructure diffuser,general diffuser,and luminaire without the diffuser is measured by the integrating sphere.The results show that the CD-pattern micro-diffuser has a transmittance of 90.6%,and its light transmittance is 8.8%higher than that of the general diffuser.