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This paper presents the implementation and evaluation of a 50,000-pose-sample-per-second, 6-degree-of-freedom optical head tracking instrument with motion-to-pose latency of 28 mu s and dynamic precision of 1-2 arcminutes. The instrument uses high-intensity infrared emitters and two duo-lateral photodiode-based optical sensors to triangulate pose. This instrument serves two purposes: it is the first step towards the requisite head tracking component in sub-100 mu s motion-to-photon latency optical see-through augmented reality (OST AR) head-mounted display (HMD) systems; and it enables new avenues of research into human visual perception - including measuring the thresholds for perceptible real-virtual displacement during head rotation and other human research requiring high-sample-rate motion tracking. The instrument's tracking volume is limited to about 120x120x250mm but allows for the full range of natural head rotation and is sufficient for research involving seated users. We discuss how the instrument's tracking volume is scalable in multiple ways and some of the trade-offs involved therein. Finally, we introduce a novel laser-pointer-based measurement technique for assessing the instrument's tracking latency and repeatability. We show that the instrument's motion-to-pose latency is 28 mu s and that it is repeatable within 1-2 arcminutes at mean rotational velocities (yaw) in excess of 500 degrees/sec.
机译：本文介绍了每秒50,000个姿势样品，6度自由度的光学头跟踪仪的实施和评估，具有28亩的动作延迟，动态精度为1-2分配。该仪器使用高强度红外发射器和基于两种二级光电二极管的光学传感器来三角形姿势。该仪器有两个目的：它是朝向子-100MU S Motion-photon延迟光学透视透视（OST AR）头戴式显示器（HMD）系统中的必要头跟踪组件的第一步;并且它使新的研究途径能够进入人类视觉感知 - 包括测量在头部旋转和其他人类研究期间的可察觉真实虚拟位移的阈值以及需要高采样率运动跟踪的人。仪器的跟踪量仅限于约120x120x250mm，但允许全系列的自然头部旋转，并且足以用于涉及坐在用户的研究。我们讨论仪器的跟踪量如何以多种方式和一些涉及其中的权衡。最后，我们介绍了一种新的基于激光指针的测量技术，用于评估仪器的跟踪延迟和可重复性。我们表明仪器的动作姿势延迟是28亩，并且它在1-2个旋转速度（偏航）的旋转速度（偏航）超过500度/秒内是可重复的。

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