| 基于新型导光管的微型DLP 投影式光路设计 |
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| 引用本文： | 王程,郝文良,田丽伟,王若飞,朱向冰. 基于新型导光管的微型DLP 投影式光路设计[J]. 红外与激光工程, 2015, 44(8): 2472-2477 |
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| 作者姓名： | 王程 郝文良 田丽伟 王若飞 朱向冰 |
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| 作者单位： | 1.安徽师范大学 物理系,安徽 芜湖 241000; |
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| 基金项目： | 安徽省科技攻关项目(1301022058) |
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| 摘 要： | 传统的数字光处理(DLP)技术无法收集利用数字微镜(DMD)芯片上微镜处于 OFF态时反射的光线,针对这种缺陷,提出一种基于新型导光管的微型DLP投影光学系统的设计方案,该系统包括LED、导光管、色轮、准直系统和投影透镜。提出在锥形导光管的基础上加上一根弯型的导光管和复合抛物面聚光器(CPC)用来收集被DMD反射的多余的光线。先用非成像光学的理论分析和计算出各部分的相关参数,再用ZEMAX软件对准直系统和投影透镜进行结构优化,最后用TracePro软件建立模型并仿真,仿真结果表明:随着OFF态微镜数量的增加,收集光管提高系统光能利用率的能力先增加后减小。相比没有收集光管的情况,当DMD芯片上处于OFF态微镜数量为50%时,导光管提高的光能利用率最多,为5.91%。
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| 关 键 词： | 光学设计 LED DMD 导光管 光能利用率 |
| 收稿时间： | 2014-12-05 |
Optical design of micro DLP projection based on novel light pipe |
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| Affiliation: | 1.Department of Physics,Anhui Normal University,Wuhu 241000,China;2.Chery New Energy Automotive Technology Co. Ltd,Wuhu 241000,China |
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| Abstract: | Traditional DLP technologies can not collect and utilize the light which is reflected by the micromirrors of DMD in the OFF state. Aiming at this defect, one design scheme of the micro DLP projection system based on a novel light pipe was presented. This system included LEDs, light pipe, color wheel, the collimation system and projection lens. A bending light pipe was added on the base of the tapered light pipe, and a compound parabolic concentrator(CPC) was used in the input end to collect the extra light reflected by the DMD. First, the related parameters of each part were analyzed and calculated according to the nonimaging optics theory. Second, the collimation system and projection lens were optimized by ZEMAX software. Finally, the model was built and simulated in TracePro software. The simulation results show that: with the number of micromirrors in the OFF state growing, the improving light efficiency ability of collecting light pipe first increases then decreases. Comparing with having no collecting light pipe, the light efficiency is increased by 5.33%; light pipe improves the most light efficiency, 5.91%, when half of the micromirrors are in the OFF state. |
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