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Micro LED车灯投影光学系统设计与优化

李香兰 金霞 吕金光 郑凯丰 陈宇鹏 赵百轩 赵莹泽 秦余欣 王惟彪 梁静秋

李香兰, 金霞, 吕金光, 郑凯丰, 陈宇鹏, 赵百轩, 赵莹泽, 秦余欣, 王惟彪, 梁静秋. Micro LED车灯投影光学系统设计与优化[J]. , 2024, 17(1): 89-99. doi: 10.37188/CO.2023-0063
引用本文: 李香兰, 金霞, 吕金光, 郑凯丰, 陈宇鹏, 赵百轩, 赵莹泽, 秦余欣, 王惟彪, 梁静秋. Micro LED车灯投影光学系统设计与优化[J]. , 2024, 17(1): 89-99. doi: 10.37188/CO.2023-0063
LI Xiang-lan, JIN Xia, LV Jin-guang, ZHENG Kai-feng, CHEN Yu-peng, ZHAO Bai-xuan, ZHAO Ying-ze, QIN Yu-xin, WANG Wei-biao, LIANG Jing-qiu. Design and optimization of Micro LED vehicle light projection optical system[J]. Chinese Optics, 2024, 17(1): 89-99. doi: 10.37188/CO.2023-0063
Citation: LI Xiang-lan, JIN Xia, LV Jin-guang, ZHENG Kai-feng, CHEN Yu-peng, ZHAO Bai-xuan, ZHAO Ying-ze, QIN Yu-xin, WANG Wei-biao, LIANG Jing-qiu. Design and optimization of Micro LED vehicle light projection optical system[J]. Chinese Optics, 2024, 17(1): 89-99. doi: 10.37188/CO.2023-0063

Micro LED车灯投影光学系统设计与优化

基金项目: 国家重点研发计划(No. 2022YFB3604702);吉林省科技发展计划(No. 20200401056GX)
详细信息
    作者简介:

    李香兰(1997—),女,吉林长春人,硕士研究生,2019年于吉林师范大学获得理学学士学位,主要从事Micro LED芯片及光学设计方面的研究。E-mail:lixianglan20@mails.ucas.ac.cn

    郑凯丰(1993—),男,吉林长春人,博士,工程师,2021年于中国科学院长春光学精密机械与物理研究所获得博士学位,主要从事基于Micro LED的光学系统设计、辐射温度测量等方向的研究。E-mail:zhengkaifeng@ciomp.ac.cn

    梁静秋(1962—),女,吉林长春人,博士,研究员,博士生导师,2003年于中国科学院长春光学精密机械与物理研究所获得博士学位,主要从事微/纳光机电系统及光通信、红外光谱技术及仪器、Micro LED芯片及应用等方面的研究。E-mail:liangjq@ciomp.ac.cn

  • 中图分类号: TP394.1;TH691.9

Design and optimization of Micro LED vehicle light projection optical system

Funds: Supported by National Key Research and Development Program (No. 2022YFB3604702); Jilin Province Science and Technology Development Plan (No. 20200401056GX)
More Information
  • 摘要:

    本文提出了一种基于Micro LED阵列的车灯投影方案,设计了以像素尺寸为80 μm×80 μm的200×150白光Micro LED阵列作为显示光源,视场角为16°×34°的车灯投影光学系统,并对物面倾斜角度和光学系统结构进行了优化。此外,分别采用反向畸变处理方法和像素灰度调制方法用以解决车灯投影图像的梯形畸变和照度均匀性问题,并搭建了投影实验平台,对图像校正方法进行了验证。实验结果表明:校正后图像梯形畸变系数p1p2分别从0.0932和0.3680下降至0.0835和0.0373,像面照度均匀性从83.2%提高到93.2%。本文通过对基于Micro LED的倾斜投影车灯光学系统进行优化设计及采用图像校正方法,实现了高光效、低畸变的车灯投影。

     

  • 图 1  Micro LED车灯投影系统结构示意图

    Figure 1.  Schematic diagram of Micro LED headlight projection system

    图 2  车灯投影示意图

    Figure 2.  Schematic diagram of headlight projection

    图 3  投影关系示意图

    Figure 3.  Schematic diagram of the projection relationship

    图 4  车灯投影系统光路图

    Figure 4.  Optical path diagram of the vehicle headlight projection system

    图 5  光学系统成像质量评价分析图

    Figure 5.  Evaluation of the imaging quality of the optical system

    图 6  优化后的车灯投影光学系统光路图

    Figure 6.  Optimized optical path diagram of the vehicle headlight projection optical system

    图 7  物面倾斜优化前后MTF曲线

    Figure 7.  MTF curves before and after object plane tilt optimization

    图 8  不同温度下系统各视场的MTF图

    Figure 8.  MTF diagrams for each field of view of the system at different temperatures

    图 9  图像网格畸变

    Figure 9.  Image mesh distortion

    图 10  图像对应控制点

    Figure 10.  Corresponding control points in the image

    图 11  直接投影流程及畸变校正投影流程图

    Figure 11.  Flow charts of direct projection and distortion projection

    图 12  模拟图像的照度分布

    Figure 12.  Illumination distribution of the simulated images

    图 13  校正前投影图像

    Figure 13.  Projected image before correction

    图 14  校正后投影图像

    Figure 14.  Projected image after correction

    图 15  相机标定分析

    Figure 15.  Camera calibration analysis

    图 16  原始输出图像的照度分布

    Figure 16.  Illumination distribution of the original output image

    图 17  输出图像的照度分布校正结果

    Figure 17.  Correction results of the illumination distribution of the output image

    表  1  车灯投影系统Micro LED阵列参数

    Table  1.   Parameters of Micro LED arrays for vehicle headlight projection system

    指标参数
    像素尺寸/μm80×80
    像素数量200×150
    阵列尺寸/mm16×12
    总光通量/lm2000
    下载: 导出CSV

    表  2  投影物镜的关键参数及设计指标

    Table  2.   Key parameters and design specifications for projection objective

    指标参数
    工作波段/nm400~700
    F2
    视场16°(V)×34°(H)
    焦距/mm40
    MTF≥0.5@0.0125 lp/mm(−20 °C~80 °C)
    下载: 导出CSV

    表  3  系统公差表

    Table  3.   Table of system tolerance parameters

    参数
    曲率半径/N3
    表面不规则度ΔN0.3
    厚度/mm0.02
    表面偏心/mm0.01
    表面倾斜/(°)0.02
    折射率公差0.001
    阿贝数公差1%
    装调偏心/mm0.03
    装调倾斜/(°)0.05
    下载: 导出CSV

    表  4  光学系统公差分析结果

    Table  4.   Tolerance analysis results of optical system

    参数
    名义值0.720
    最佳值0.725
    最差值0.456
    平均值0.680
    标准差0.060
    下载: 导出CSV
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出版历程
  • 收稿日期:  2023-04-11
  • 修回日期:  2023-05-04
  • 网络出版日期:  2023-07-17

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