投影显示系统的研究与设计

发布时间：2018-05-20 22:03

本文选题：光学设计 + 大孔径　；参考：《广东工业大学》2017年硕士论文

【摘要】：投影显示技术是实现大屏幕显示的有效方式。科技发展突飞猛进,人们对投影显示产品的,要求日益增高,而投影显示也逐步向高分辨率、高亮度、大屏幕、微型化等方向发展。微型投影技术是一种新型的现代投影显示技术,它以其小型化的优点,携带方便,逐渐应用到人们的日常生活中,特别在商务办公,教学,家庭影院等方面优势凸显,成为投影显示的发展趋势。数字光处理(Digital Light Processing,DLP)投影显示器具有高分辨率、高亮度、高对比度,结合发光二极管(lighting emitting diode,LED)光源优势,并加以自由曲面全内反射(Total Internal Reflection,TIR)透镜二次配光设计,实现投影机的小型化,满足人们对微投影仪的简单和便携的要求。首先,设计出一套非对称三镜组大孔径变焦镜头,实现优质成像和光束约束:小光圈F#1.2(1.4),物方孔径和焦距28mm和33mm,中镜组实现3倍光学平滑变焦,系统长300mm;出光束3°~30°间宽幅调节,总分辨率MTF值均大于限值(0.4)。光效利用率40%;常规材质,球面配光,构建近标准化光学模组。其次,分析了DLP微投影显示光学系统,对投影机的成像镜头和照明分别进行设计。在成像镜头中添加非球面结构设计提高成像质量。在照明部分设计中,用单个自由曲面TIR透镜代替多片透镜元件进行准直设计。缩小系统体积结构且提高了光能利用效率。最后,介绍了自由曲面光学组件的特征、数学表达式及其设计思路。详细分析自由曲面头盔显示器系统的光学设计过程,并设计出了FFS棱镜结构头盔显示器。通过对FFS棱镜和传统旋转对称结构的比较分析,揭示了自由曲面在光学设计中的重要作用。
[Abstract]:Projection display technology is an effective way to realize large screen display. With the rapid development of science and technology, the demand for projection display products is increasing, and projection display is gradually developing towards the direction of high resolution, high brightness, large screen, miniaturization and so on. Micro projection technology is a new type of modern projection display technology. It has the advantages of miniaturization, convenient carrying, and gradually applied to people's daily life, especially in the aspects of business office, teaching, home theater and so on. Become the trend of projection display. Digital Light processing DLP) projection display has the advantages of high resolution, high brightness, high contrast, combined with the advantages of light-emitting diode illuminating emitting diodes (LED), and the secondary light distribution design of the free surface total Internal reflection (TIR) lens is carried out to realize the miniaturization of the projector. Meet the simple and portable requirements of microprojectors. First of all, a set of large aperture zoom lens with asymmetric three-mirror set is designed to achieve high quality imaging and beam constraint: small aperture F #1.2N 1.4, square aperture and focal length 28mm and 33mm, medium mirror group realize 3 times optical smoothing zoom, system length 300mm, and beam width between 3 掳and 30 掳. The total resolution MTF value is greater than the limit value of 0. 4%. Light efficiency 40; conventional materials, spherical light distribution, building a near-standardized optical module. Secondly, the DLP micro-projection display optical system is analyzed, and the imaging lens and illumination of the projector are designed respectively. The aspheric structure design is added to the imaging lens to improve the imaging quality. In the illumination design, a single free-form curved TIR lens is used to collimate instead of the multi-lens element. The volume structure of the system is reduced and the utilization efficiency of light energy is improved. Finally, the characteristics, mathematical expressions and design ideas of free-form surface optical components are introduced. The optical design process of freeform curved helmet display system is analyzed in detail, and the FFS prism structure helmet display is designed. Through the comparison and analysis of FFS prism and traditional rotational symmetric structure, the important role of free surface in optical design is revealed.
【学位授予单位】：广东工业大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TN873

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