中国照明电器

本文针对汽车高像素大灯应用，基于0.55英寸DMD芯片利用ZEMAX光学软件设计了两片式、三片式及四片式投影镜头系统。通过优化设计，四片式反远距结构在43 lp/mm空间频率处的调制传递函数大于0.6，光学畸变仅为1.188%，光学总长控制在63.1 mm；三片式结构MTF大于0.5，畸变为1.1937%。公差分析表明，在相同加工装配公差条件下，四片式结构90%概率MTF值高于0.402，性能稳定性最佳；而两片式结构90%概率MTF值仅0.228，工程风险较高。

This article focuses on the application of automotive high pixel headlights,and designs two-piece,three piece,and four piece projection lens systems based on a 0.55-inch DMD chip using ZEMAX optical software.Through optimized design,the modulation transfer function of the four piece anti long distance structure at a spatial frequency of 43 lp/mm is greater than 0.6,the optical distortion is only 1.188%,and the total optical length is controlled at 63.1 mm;the MTF of the three piece structure is greater than 0.5,and the distortion is 1.1937%.Tolerance analysis shows that under the same machining and assembly tolerance conditions,there is a 90% probability that the MTF value of the four piece structure is higher than 0.402,indicating the best performance stability;However,the 90% probability MTF value of the two-piece structure is only 0.228,indicating a higher engineering risk.