摘要
照明光路是决定投影仪光学引擎的光能利用率和光学体积的主要因素。传统照明光路针对朗伯光源进行收集与分配,无法从根本上消除系统光效低和体积大的缺点。设计了一种基于渐变折射率(GRIN)透镜阵列的单片式数字光处理(DLP)激光投影光学引擎的照明光路,以单级透镜系统取代了传统的聚光、匀光等结构复杂的光学组件。通过光线追迹软件对照明光路的光学特性进行了仿真评估,光能利用率达69.5%,照明均匀性达90.9%,光学体积仅为3.06cm3,达到了提高光效和减小体积的设计目的。
Illumination system is the key factor influencing both the luminous efficiency and the size of the optical engine of a projector. The traditional illumination system aims at the collection and distribution only for Lambert source, failing to radically overcome the disadvantages of low luminous efficiency or big size. A design in illumination system using Gradient-Index （GRIN） lens arrays for single chip digital light processing （DLP） laser projector is introduced. The complex optical components of traditional illumination system are substituted by single-stage lens. Also, the optical performance is simulated and evaluated by the ray tracing software. The results show that the luminous efficiency of the entire illumination system is 69.5 %, the uniformity of illumination is 90.9%, and the volume is only 3.06 cm^3 , reaching the goal of improving the luminous efficiency and reducing the size of optical engine.
出处
《激光与光电子学进展》
CSCD
北大核心
2011年第12期109-115,共7页
Laser & Optoelectronics Progress
基金
四川省应用基础研究基金(2009JY0054)
富通翱翔基金(FTAX201006)资助课题
关键词
光学设计
渐变折射率透镜
仿真
光能利用率
照明均匀性
optical design
graded index lens
simulation
luminous efficiency
uniformity of illumination
