折反式超短焦投影镜头设计
发布时间：2018-08-30 16:02
【摘要】：超短焦投影技术是近年来兴起的一项新型投影显示技术,其特点是能在很短的投影距离下实现大画面的显示效果,由于工作距离很短,几乎靠近投影幕布,极大的节约了使用空间,同时克服了普通投影机工作时强光容易直射人眼的问题,也完美地解决了讲演者站在投影机和屏幕之间时会产生阴影遮挡的问题,增加了自由活动空间,提升了教学、演讲和展示的互动性。这种新型投影技术的实现主要依赖于经过特殊光学设计的投影物镜,前人在这种超短焦镜头的设计上做过很多相关的研究与实践,在此基础上本文采用离轴折反式的成像光学系统设计方法,成功设计了一款折反式超短焦投影镜头。论文首先介绍了传统的共轴成像系统在大视场、超短焦投影成像上所表现出来的问题和局限性,基于此提出了本文所采用的折反式离轴成像系统设计理论,从原理上分析了这种结构在大视场的情况下解决畸变校正、垂轴色差和场曲控制的问题。随后针对本文所要设计镜头的各项参数目标,选取了合适的初始结构,在设计原理所体现出的优化思想下,经过大量的修改、调整和优化,最终得出符合要求的设计结果。之后对所设计的镜头系统做了详细的公差分析,结果表明公差性能优越、良品率高,同时利用该分析结果确定了系统光机设计的公差要求。最后,在完成光机设计之后,本文加工和装配了一套实验样机系统,经过几轮反复的调试得到满意像质的投影画面,随后对镜头做了成像清晰度评价、畸变与色差评价以及投射比和放大率计算,各项评价结果表明所设计的折反式超短焦投影镜头较好的完成了设计目标要求,其中投射比大小为0.3,视场角达到150。F数为2.6。镜头结构简单紧凑,折射镜组部分仅含有13片透镜,只使用到1片非球面透镜和1片凹面非球面反射镜。
[Abstract]:Ultra-short focus projection technology is a new projection display technology developed in recent years. Its characteristic is that it can realize the display effect of large picture at very short projection distance, because the working distance is very short, it is almost close to the projection curtain. Greatly saves the use space, at the same time overcomes the common projector to work the strong light easy to shoot the human eye question, also has solved perfectly the speaker standing between the projector and the screen will produce the shadow to block the problem, Increases the free movement space, enhances the teaching, the speech and the display interactivity. The realization of this new projection technology mainly depends on the projection objective lens with special optical design. The predecessors have done a lot of relevant research and practice in the design of the ultra-short focus lens. On the basis of this, an off-axis reflexive imaging optical system design method is used to successfully design a reflexive ultra-short focus projection lens. This paper first introduces the problems and limitations of the traditional coaxial imaging system in large field of view and ultrashort focus projection imaging. Based on this, the design theory of the reflexive off-axis imaging system is proposed. In principle, the problems of distortion correction, vertical axis chromatic aberration and field curvature control are analyzed in the case of large field of view. Then according to the parameters of the lens to be designed in this paper, select the appropriate initial structure, under the optimization thought reflected in the design principle, after a lot of modification, adjustment and optimization, finally get the design results that meet the requirements. The tolerance analysis of the designed lens system shows that the tolerance performance is superior and the good product rate is high. At the same time, the tolerance requirements of the system optical machine design are determined by the result of the analysis. Finally, after finishing the optical machine design, this paper processes and assembles a set of experimental prototype system, after several rounds of repeated debugging to obtain a satisfactory image quality of the projection screen, and then the lens image definition evaluation. The evaluation results of distortion and color difference, projection ratio and magnification show that the designed reflexive ultrashort focus projection lens has achieved the design goal well, in which the projection ratio is 0.3, the field angle is 150.F and the number is 2.6. The lens structure is simple and compact, only 13 lenses are included in the refraction lens system, only one aspheric lens and one concave aspherical mirror are used.
【学位授予单位】：浙江大学
【学位级别】：硕士
【学位授予年份】：2016
【分类号】：TH741.5
本文编号：2213576
[Abstract]:Ultra-short focus projection technology is a new projection display technology developed in recent years. Its characteristic is that it can realize the display effect of large picture at very short projection distance, because the working distance is very short, it is almost close to the projection curtain. Greatly saves the use space, at the same time overcomes the common projector to work the strong light easy to shoot the human eye question, also has solved perfectly the speaker standing between the projector and the screen will produce the shadow to block the problem, Increases the free movement space, enhances the teaching, the speech and the display interactivity. The realization of this new projection technology mainly depends on the projection objective lens with special optical design. The predecessors have done a lot of relevant research and practice in the design of the ultra-short focus lens. On the basis of this, an off-axis reflexive imaging optical system design method is used to successfully design a reflexive ultra-short focus projection lens. This paper first introduces the problems and limitations of the traditional coaxial imaging system in large field of view and ultrashort focus projection imaging. Based on this, the design theory of the reflexive off-axis imaging system is proposed. In principle, the problems of distortion correction, vertical axis chromatic aberration and field curvature control are analyzed in the case of large field of view. Then according to the parameters of the lens to be designed in this paper, select the appropriate initial structure, under the optimization thought reflected in the design principle, after a lot of modification, adjustment and optimization, finally get the design results that meet the requirements. The tolerance analysis of the designed lens system shows that the tolerance performance is superior and the good product rate is high. At the same time, the tolerance requirements of the system optical machine design are determined by the result of the analysis. Finally, after finishing the optical machine design, this paper processes and assembles a set of experimental prototype system, after several rounds of repeated debugging to obtain a satisfactory image quality of the projection screen, and then the lens image definition evaluation. The evaluation results of distortion and color difference, projection ratio and magnification show that the designed reflexive ultrashort focus projection lens has achieved the design goal well, in which the projection ratio is 0.3, the field angle is 150.F and the number is 2.6. The lens structure is simple and compact, only 13 lenses are included in the refraction lens system, only one aspheric lens and one concave aspherical mirror are used.
【学位授予单位】：浙江大学
【学位级别】：硕士
【学位授予年份】：2016
【分类号】：TH741.5
【相似文献】
相关期刊论文 前5条
1 仲跻功;;光学积分器及其均匀化效果[J];仪器制造;1983年06期
2 宋禄平;;投影镜头概念、原理及自制[J];电子制作;2004年08期
3 仲跻功;;提高光学积分器均匀化效果的有关问题[J];光学机械;1983年05期
4 李维善;陈琛;张禹;刘宵婵;;基于ZEMAX软件的DLP微型投影镜头的设计[J];应用光学;2011年06期
5 ;[J];;年期
相关会议论文 前1条
1 姚骏恩;王后乐;贾裕民;;电磁透镜投影镜焦距的计算公式[A];第四次全国电子显微学会议论文摘要集[C];1986年
相关硕士学位论文 前1条
1 陈驰;折反式超短焦投影镜头设计[D];浙江大学;2016年
，本文编号：2213576
本文链接：https://www.wllwen.com/kejilunwen/yiqiyibiao/2213576.html
