摘要
为了对LED教室灯具配光,建立了复合抛物面集光器配光系统。分析了LED光源发光特性,阐明了对LED光源进行二次配光的必要性。建立了三维复合抛物面集光器(CPC)模型,并由边缘光线原理计算得出三维复合抛物面集光器(CPC)模型各参数与最大出射半角θm的关系,分析了θm的制约因素。由阅读灯照度均匀度要求,确定了复合抛物面集光器(CPC)模型各参数的值,在光学分析软件Tracepro中建立了CPC模型,将LED光源置于其焦平面上,结合教室桌面与灯具距离,模拟了基于CPC配光的LED教室灯具的照度分布。试验结果表明,CPC配光系统最大出光半角为30°时,光照均匀度超过0.7,满足建筑照明设计标准GB 50034-2004对阅读照明的要求,该灯具有效光通可达95%以上。
A compound parabolic collector light distribution system was established for light distribution of LED lamps in the classroom.First the characteristics of the LED light source were analyzed,as well as the necessity of the secondary light distribution for the LED light source. The 3Dnonimaging optics compound parabolic collector(CPC)model was established.The relationship between its parameters and the maximum exit half angleθm was calculated by the edge light principle and the restricting factors ofθm were given.Then the values of all parameters of CPC model were determined according to the reading lamp illumination uniformity requirements,the CPC model was built in the optical analysis software Tracepro.The LED light source was placed on the focal plane of CPC model and the LED classroom lighting illumination distribution based on CPC was simulated combining with classroom desktop and the lamp distance.Results showed that the light uniformity cound reach more than 0.7and satisfy the building lighting design standard GB 50034-2004for reading lighting requirements asθm was greater than 30°,the effective optical flux was more than 95%.
出处
《应用光学》
CAS
CSCD
北大核心
2014年第3期395-399,共5页
Journal of Applied Optics
基金
福建省闽台合作重点项目(2011I0001)
教育厅项目(JA09184)
