摘要
随着大功率LED发射光强的不断提高,采用单粒LED为光源的照明系统已能满足许多场合的照明需求。根据非成像反射器的设计方法,研究了一种以单粒LED为光源的照明系统光照均匀性问题,提出了一种能实现目标平面特定区域内的照度值为常数的光反射器面形设计方法。该方法根据目标平面上的照度分布函数建立微分方程,通过求解微分方程得到反射器面形轮廓的函数,根据该函数建立照明系统的模型,用ASAP对该模型进行光线追迹,得到系统的光照均匀性,并进而确定适合数控加工的反射器面形数据。
With the increasing of emission intensity of high power LED, illumination system with a single LED light source can meet requirements in many fields. The illumination uniformity of such kind of illumination system with a single LED light source is studied. According to nonimaging reflector design method, a method of designing surface profile of the reflector which can let irradiance of the desired area on the target plane be constant is presented. A differential equation is established with this method based on the radiance distribution function of the target plane, and the function of surface profile of the reflector is obtained by solving the differential equation. Model of the illumination system is constructed by rays tracing with ASAP software. Illumination uniformity of the system is obtained, and data of the surface profile for NC manufacture is obtained finally.
出处
《光学技术》
CAS
CSCD
北大核心
2009年第1期74-76,共3页
Optical Technique
基金
国家自然科学基金资助项目(60774102)
上海市重点优势学科资助项目(Y0102)
关键词
应用光学
LED照明
照明均匀性
反射器
applied optics
LED illumination
illuminative uniformity
reflector
