共查询到20条相似文献,搜索用时 77 毫秒
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折/衍混合增强现实头盔显示器光学系统设计 总被引:12,自引:2,他引:10
利用衍射光学元件独有的负色散性质和可实现光波面任意相位调制的特点 ,在光学系统中引入衍射面 ,设计了出瞳距离为 2 6mm ,出瞳直径为 12mm ,视场角为 2 0°(H)× 15 .4°(V)的用于增强现实的折 /衍混合穿透式双通道头盔显示器的光学系统。设计的系统内、外两个光通道的光能量利用率分别达到 1/4和 1/2。系统分辨力适合采用分辨率为 80 0× 6 0 0、像元尺寸为 33μm的图像源。设计结果 ,系统镜头直径小于 4 6mm ,满足用于双目显示的要求。设计结果表明 ,该系统不仅在结构上满足使用者因素的要求 ,而且成像质量接近衍射极限 ,具有很高的分辨率 ,色差和畸变非常小。设计结果完全满足用于增强现实的要求。 相似文献
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折/衍混合微光夜视头盔显示器光学系统设计 总被引:13,自引:4,他引:9
设计了穿透式双通道单目微光夜视头盔的光学系统。其中微光物镜视场角为± 14°,f数为 1.4 ,含有一个衍射面。设计结果可兼容输入面尺寸为18mm ,面型为平面的二代和三代微光像增强器 ;最大畸变小于 0 .5 % ,可用于夜间精确瞄准与测量。考虑黑暗环境使用的安全问题 ,显示系统采用穿透式双通道单目光学系统 ,实现内部图像和外部真实世界的同时观察。显示系统的特性参量为 :出瞳尺寸为 15mm (H)× 10mm (V)、视场为[± 14°(H) ]× [± 10° (V) ]、出瞳距离为 2 5mm。采用全息组合器大大提高能量利用率。设计结果系统角分辨力为0 .6mrad ,最大畸变为 3%。显示系统结构紧凑 ,可与输出面尺寸为18mm的图像源相连。 相似文献
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折/衍混合超轻小型投影式头盔光学系统设计 总被引:4,自引:1,他引:3
投影式头盔系统具有成像质量高,结构轻便等特点。分析投影式头盔光学系统设计参数的选择原则,并基于投影式物镜引入对角为1.55 cm的新型OLED显示器作为图像源,采用折射/衍射混合结构来减轻光学系统的体积和重量。通过ZEMAX软件对系统进行优化,设计得到一款质量仅1.35 g,直径11.32 mm的超轻小型三片式头盔显示器光学系统。系统中心视场MTF在32lp/mm处达到了0.52,在该空间频率下对应人眼的分辨率为1.85,′在大视场处,子午和弧矢MTF也均大于0.2,分辨率满足SVGA显示模式要求。 相似文献
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《光学学报》2015,(5)
设计了一种采用层叠阵列波导结构的紧凑型穿透式视频眼镜光学系统。光学系统由层叠阵列波导系统、照明系统、目镜系统组成。层叠阵列波导是一种具有角度选择膜系实现穿透式显示的全新光学组合器,可以消除半透半反面波导的鬼像效应;照明系统为LCOS微显示器提供均匀照明,均匀性为92.3%;目镜系统负责光束的准直,对其调制传递函数、点列图、场曲、畸变和色差等参数进行了分析,结果表明获得了良好的光学性能。该穿透式视频眼镜分辨率为825 pixel×480 pixel,系统总重135 g,在20 mm出瞳距离和8 mm×8 mm眼动范围下,实现30°视场,在驱动电路功耗为1 W的情况下,系统亮度为3000 nit。 相似文献
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提出了一种基于增强现实的室内漫游系统,在这个系统中用户通过HMD观察增强的视景。在这个视景中不但包含真实布景的图像,还包含有计算机生成的虚拟物体的图像。为了实现虚实场景之间的注册,在HMD上安装有两个摄像机:场景摄像机与跟踪摄像机。并且在用户所在房间的顶部安装了一系列的红外标志点,这些标志点的图像由跟踪摄像机获取,并通过位置估计算法计算用户头部的位置和姿态。另外,通过一对安装有ARtoolKit标志点的手套,实现用户与虚拟环境之间的交互。最后,一套海底漫系统被开发出来,以验证整个漫游系统的可用性 相似文献
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Accommodation and convergence play critical roles in the natural process of depth perception, and the field of natural three-dimensional (3D) perception in stereo displays has been extensively explored. However, no prototypes of these natural 3D displays are suitable for wear due to the system size and weight. In addition, few of the researches have involved subjects with ametropia. We propose and develop an optical see-through head-mounted display (HMD) capable of diopter adjustment of both the virtual image and the real world scene. The prototype demonstrates a diagonal field of view (NOV) of 42° and an exit pupil diameter of 9 mnl, and a diopter adjustment range of -5.5D to 0D. Depth adjustment of virtual image is demonstrated with experiments, the results show the HMD can be further used to investigate the accommodation and convergence cues in depth perception in AR environment, particularly for users with different degree of the ametropia. 相似文献
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为标定和校准头盔瞄准具检测设备,提出一种新的光学结构,并设计了一款标准头盔显示系统(HMD)。该系统采用球面共轴设计,在有限体积的限制下满足了低畸变、高清晰的光学指标要求。利用对称性光学设计原则分步设计,设计的标准HMD系统出瞳清晰,可保证系统各种光学像差的综合校正。针对1.27cm(1/2in)微显示器设计了视场为30°、出瞳距离为75mm的标准HMD光学系统,各视场在分辨率30lp/mm处的MTF值均大于0.3,系统畸变小于0.9%。设计的标准HMD光学系统形式简单、结构紧凑,光学性能优良,可作为头盔瞄准具检测设备标准件。 相似文献
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Design of a wide-angle off-axis optical see-through head-mounted display (HMD) becomes a challenge since its weight and size are constrained by human factors. Diffractive optics has the potential to play a key role in several areas of head-mounted display. They can reduce size and weight while providing some unique functions that would be difficult to implement with conventional refractive optics. This paper presents a 67°-diagonal field of view, wide spectral band hybrid diffractive-refractive see-through head-mounted display (HMD) using off-axis optics. It possesses a 10 mm exit pupil and a 22 mm eye relief, and satisfies the requirements of human factors. The whole optical system is suitable for a 20 mm-diagonal color liquid crystal display (LCD) with XGA resolution. 相似文献
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We present a concept of a wide-angle, lightweight, optical see-through head-mounted display (HMD) using free-form optics tiling. Free-form optics tiling can potentially address several critical problems in existing tiled HMD designs that use rotationally symmetric optics. The optical design of our tiled optical see-through HMD achieves a field of view (FOV) of 56° × 45° and an angular resolution of 3.2 arcmin with two display channels. We demonstrate a proof-of-concept prototype and present some of its manufacturing details. The FOV can be further enlarged by tiling more display channels together at their bottom and side surfaces. 相似文献
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In this study a non-contact tracker for calculating the angle of rotation of a HMD (head-mounted display) is proposed. The merit of our proposed method is that the computer will change the spatial view to match the user's head posture and keep the ‘immersion' sensation at high accuracy and precision. Our results are validated using moiré fringes as an excellent HMD tracker. 相似文献
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We are presenting the results of a freeform HMD optical system design. The tolerancing and stray light analyses are carried out to analyze the optical performance of this system. Results are discussed in detail. 相似文献