LED光源照明DLP折反射超短焦投影光引擎系统研究

发布时间：2018-07-10 17:47

本文选题：DLP + 非均匀网格　；参考：《浙江大学》2016年博士论文

【摘要】：论文首先回顾了超短焦投影技术的发展的现状,介绍了超短焦投影相对于普通投影的巨大优势和良好的市场前景。同时详细介绍了目前市场上的主流超短焦投影机,指出了他们的不足。提出了“非均匀网格法”和“参数化设计法”两种自由曲面设计方法。论文回顾了超短焦投影成像系统的现有的设计方法,对每种方法分析了优劣势,基于这些讨论,给出了本文需要解决的问题。提出了折反射超短焦投影成像系统成像原理与像差控制的原理,对折反射超短焦投影成像系统的成像内在机理以及每一种像差的产生原因和控制手段进行了深刻的分析。接下来,详细论述了旋转对称反射镜成像系统物像关系,并以此为基础,详细阐述了折反射系统初始结构的构建手段。最后,提出了应用于超短焦投影成像系统设计的“像差校正法”,并针对“像差校正法”的不足提出了适用于一般情况的“通用设计法”。在以上理论基础上,设计了LED照明的DLP折反射超短焦投影光引擎,并完成了模具品样机的制造和测试。折反射超短焦投影光引擎样机具有优异的清晰度和很小的畸变,以及十分快捷的安装调试速度。其易于加工制造的事实表明,折反射超短焦投影光引擎的设计完全达到了设计指标,同时具有优异的容差性。系统输出光通量390流明,色彩艳丽,很好的达到了设计要求。本文提出的主要创新如下：(1) 提出了折反射超短焦投影成像系统的“像差校正法”。反射镜具有自身的成像规律,利用这个成像规律可以找到折射部分和反射镜的匹配方式,即中间像。利用“像差校正法”,可以方便的基于对子午中间像的解析求解给出一种构建旋转对称折反射超短焦投影成像系统良好初始结构(同时兼具较低的系统复杂度和较少的像差)(2) 提出了折反射超短焦投影成像系统的“通用设计法”,利用本方法,可以得到任意入射平面内的中间像,据此设计者可以选择合适的中间像来构建系统的初始结构。对于凸面反射镜的折反射超短距投影仪,尽管其子午中间像不再适用于初始结构的构建,所提出的方法仍然适用于初始结构的构建。(3) 提出了应用于自由曲面照明设计的“非均匀网格法”。(4) 实现了LED照明的DLP折反射超短焦投影光引擎的设计、加工制造,完全达到设计标准。
[Abstract]:In this paper, the development of ultrashort focus projection technology is reviewed, and the great advantage and good market prospect of ultrashort focus projection compared with ordinary projection are introduced. At the same time, it introduces the mainstream super-short-focus projectors in the market, and points out their shortcomings. Two design methods of free surface are put forward, I. E. non-uniform mesh method and parameterized design method. In this paper, the existing design methods of ultrashort focal projection imaging system are reviewed, and the advantages and disadvantages of each method are analyzed. Based on these discussions, the problems to be solved in this paper are given. The imaging principle and aberration control principle of refraction ultrashort focal projection imaging system are put forward. The imaging intrinsic mechanism of refraction ultrashort focal projection imaging system and the causes and control methods of each aberration are deeply analyzed. Then, the object image relationship of rotating symmetric mirror imaging system is discussed in detail, and based on this, the construction method of the initial structure of the refractive reflection system is described in detail. Finally, the "aberration correction method" applied to the design of ultrashort focal projection imaging system is proposed, and the "universal design method", which is suitable for general situations, is proposed to overcome the shortcomings of the "aberration correction method". On the basis of the above theory, the DLP refraction ultra-short focus projection light engine for LED lighting is designed, and the manufacture and testing of the mould prototype are completed. The prototype of the reflex ultrashort focal projection light engine has excellent clarity, very small distortion, and very fast installation and debugging speed. The fact that it is easy to process and manufacture shows that the design of the refraction ultrashort focal projection light engine is up to the design target and has excellent tolerance. The system output luminous flux 390 lumen, bright color, very good to meet the design requirements. The main innovations in this paper are as follows: (1) an aberration correction method is proposed for refraction ultrashort focal projection imaging system. The mirror has its own imaging law, which can be used to find the matching method between the refraction part and the mirror, that is, the middle image. Using the aberration correction method, Based on the analytical solution of the meridian intermediate image, a good initial structure (both with low system complexity and less aberration) for constructing a rotation-symmetric refractive reflection ultrashort focal projection imaging system is presented. (2) in this paper, we propose a new method for constructing a rotation-symmetric refractive reflection ultrashort focal projection imaging system. (2) A "Universal Design method" for reflecting Ultra-short focus projection Imaging system, By using this method, the intermediate image in the arbitrary incident plane can be obtained, according to which the designer can choose the appropriate intermediate image to construct the initial structure of the system. For a projector with a convex reflector's refraction ultrashort, although its midmeridian image is no longer suitable for the construction of the initial structure, The proposed method is still applicable to the construction of the initial structure. (3) Non-uniform mesh method is proposed for the design of free-form surface lighting. (4) the design and manufacture of DLP refraction ultra-short focus projection light engine for LED illumination is realized. Fully meet the design standards.
【学位授予单位】：浙江大学
【学位级别】：博士
【学位授予年份】：2016
【分类号】：TH741.5

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