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DEVELOPMENT AND ASSESSMENT OF POLARIZED HEAD MOUNTED PROJECTION DISPLAYS

机译:偏光头投影显示器的开发和评估

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摘要

Head mounted projection display (HMPD) technology, as an alternative to conventional head mounted displays (HMD), offers a potential of designing wide field-of-view (FOV), low distortion optical see-through HMDs (OST-HMDs). Existing HMPD designs, however, suffer from problems of low luminance and low image resolution, which limits the applications of such information displays for the scenarios which require high luminance and high image fidelity. The design of a polarized head mounted projection display (p-HMPD) was recently proposed to overcome the challenge of low luminous efficiency in existing HMPD designs. Polarization management was employed to reduce the light loss caused by beamsplitting in an HMPD.The work in this dissertation focuses on the development and evaluation of an SXGA resolution, high efficiency p-HMPD system. The main contributions are as follows. First, the key elements in the polarization management scheme of a p-HMPD were selected and their polarization performances were characterized by measuring their Mueller matrices, based on which the overall display performance of a p-HMPD was analyzed.Second, based on a pair of ferroelectric liquid-crystal-on-silicon (FLCoS) microdisplays, a compact illumination unit and a light-weight projection system were designed, from which a p-HMPD prototype was built. Following the prototype implementation, a series of calibrations were performed to obtain correct color presentation, desired focusing setting, and optical system characteristics necessary for achieving accurate registration between virtual objects and their counterparts in the real world.Third, the imaging properties of a retroreflective screen which is an essential part of a p-HMPD or HMPD were studied and its effects on the image resolution of an HMPD system were further characterized.Finally, the performance of the system was evaluated through two objective user experiments, including a visual acuity assessment and a depth perception accuracy assessment.
机译:头戴式投影显示器(HMPD)技术是传统头戴式显示器(HMD)的替代产品,具有设计宽视角(FOV),低失真光学透明HMD(OST-HMD)的潜力。然而,现有的HMPD设计存在亮度低和图像分辨率低的问题,这限制了这种信息显示器在要求高亮度和高图像保真度的情况下的应用。最近提出了偏振头戴式投影显示器(p-HMPD)的设计,以克服现有HMPD设计中的低发光效率的挑战。偏振管理用于减少HMPD中分束引起的光损耗。本文的工作重点是SXGA分辨率,高效p-HMPD系统的开发和评估。主要贡献如下。首先,选择了p-HMPD偏振管理方案中的关键元件,并通过测量其Mueller矩阵来表征其偏振性能,然后在此基础上分析了p-HMPD的整体显示性能。针对硅铁电液晶(FLCoS)微型显示器,设计了紧凑的照明单元和轻型投影系统,从而构建了p-HMPD原型。在原型实现之后,进行了一系列校准以获得正确的颜色表示,所需的聚焦设置以及实现虚拟对象及其在真实世界中的对应对象之间的精确配准所必需的光学系统特性。第三,回射屏幕的成像特性研究了p-HMPD或HMPD必不可少的部分,并进一步表征了其对HMPD系统图像分辨率的影响。最后,通过两个客观的用户实验对系统的性能进行了评估,包括视敏度评估和深度感知准确性评估。

著录项

  • 作者

    Zhang Rui;

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  • 年度 2010
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  • 原文格式 PDF
  • 正文语种 EN
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