轻量化头戴显示器光学系统的研究
文献类型：学位论文
| 作者 | 吕向博 |
| 学位类别 | 硕士 |
| 答辩日期 | 2016 |
| 授予单位 | 中国科学院上海光学精密机械研究所 |
| 导师 | 朱菁 |
| 关键词 | 头戴显示器，光学设计，初始结构，虚拟现实 |
| 其他题名 | Research of Lightweight Head-Mounted Display Optical System |
| 中文摘要 | 头戴显示器是将像源和光学系统组合后安装于眼镜或头盔上的小型目视系统，正逐渐从军事装备向民用设备发展，在工业、医疗以及教育等领域有着广泛的应用前景，有关的报道与成果层出不穷。尤其是近年来随着高分辨率微显示器以及光学和电子行业制造工业的长足发展，头戴显示器越发受到人们关注，各种新型的结构与设备逐渐涌现，其实用化与商业化的脚步也逐步加快。光学系统是头戴显示器的核心，其光学特性的优劣决定了头戴显示器的性能的好坏。为了使用户体验更加舒适，头戴显示器的重量和体积应尽可能地小，并和人眼的各项特性相符合。本文针对这些目标，开展了轻量化头戴显示器光学系统的研究工作。文章归纳总结了光学系统的各项设计需求，提出了一种新型的光学系统初始结构计算方法，设计了一种双透镜头戴显示器光学系统，加工了对应的原理样机。主要研究内容以及成果可以分为两个部分： (1) 提出了一种基于数值优化的光学系统初始结构求解方法。此方法能够根据初级像差平衡的原则自动分配系统的光焦度，可应用于多个场合。采用此方法可以对光学系统像差自动平衡的工作加以指导。此方法得出的结果是实际透镜，不需要在后期优化时添加透镜的厚度，因此不存在改变透镜厚度时，所引起的各项像差平衡的状态被破坏的问题。采用此方法设计出了头戴显示器光学系统初始结构。 (2) 设计了一种用于轻量化虚拟现实头戴显示器的光学系统，对其设计过程进行了详细阐述，加工了对应的原理样机。系统入瞳距为15mm，入瞳大小8mm，视场角为80°，系统总长约为61.5mm，像高30.5mm。边缘视场点列图平均半径约为50?m，中心视场点列图半径在30?m左右，人眼通过此系统观察显示器时，边缘视场的图像不会模糊，同时中心视场的像质也足够好。系统的垂轴色差得到了校正，最大畸变绝对值约为15%，全视场相对照度大于0.75。原理样机长宽高分别为140mm?100mm?80mm，质量约为220g。系统各项参数和像质满足设计需求，达到了轻量化的目标。 |
| 英文摘要 | Head-Mounted Display (HMD) refers to a miniaturized visual optical system with the combination of the image source and the optical system mounted on a helmet or glasses. It is gradually developed from military equipment to civilian equipment, and it is widely used in areas such as industry, medical treatment and education. There are a lot of reports relented to HMD around the world. With the rapid developments of high-resolution micro-display and manufacturing industry, more and more attention has been paid to the head-mounted display. A variety of new structures and equipment have been gradually emerged, and the pace of commercialization and application has been accelerated. The optical system is the core of the HMD, the optical characteristics of which determine the HMD performance quality. In order to improve the user’s experience, the weight and volume of the HMD should be as small as possible, and HMD should conform to the characteristics of the human eye. Aiming at these problems, this paper carried out a study of lightweight HMD optical system. This paper summarized the design requirements of the optical system, proposed a new method of calculating the initial structure of the optical system, designed a kind of double lens HMD optical system, designed and manufactured the corresponding prototype. The main research contents and the results can be divided into two parts. (1) A new method of calculating the initial structure of the optical system is proposed. The optical power of the lens can be automated distributed by the algorithm and it can be applied to more than one occasion. With this method it can be a guide to the work of optical aberration automatic balancing. This method results in several lens which have a thickness, so there is no problem of destroying the aberration balance by increase the thickness of lens. A set of head-mounted display optical initial structure is designed by using this method. (2) A lightweight head-mounted display optical system used in the area of virtual reality is proposed, and its design process is analyzed in detail, and the corresponding prototype is also designed and manufactured. The optical system’s pupil distance is 15mm, the entrance pupil diameter is 8mm, field of view is 80 °, the system total length is about 61.5mm, and the image height is 30.5mm. From these basic parameters it can be seen that the system has the excellent characteristics of lightweight and high immersion. The spot diagram average radius of the edge field is about 50?m, and the center field is about 30?m. When view the image display through this system, the image in the edges will not blur, while the center field image quality is also good enough. Lateral color aberration has been corrected. The absolute value of the maximum distortion is about 15%. Full field illustration contrast is greater than 0.75. The volume of the prototype is 140?100?80mm and the mass is about 220g. It can be seen that all of the optical parameters and the image quality do meet the design requirements, which achieved the goal of lightweight and high immersion. |
| 语种 | 中文 |
| 源URL | [http://ir.siom.ac.cn/handle/181231/17000]  |
| 专题 | 上海光学精密机械研究所_学位论文 |
| 推荐引用方式 GB/T 7714 | 吕向博. 轻量化头戴显示器光学系统的研究[D]. 中国科学院上海光学精密机械研究所. 2016. |
入库方式： OAI收割
来源：上海光学精密机械研究所
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