SBIR Phase I: High Performance Three Dimensional Mouse and Head Tracker

*9661576德门森这个小型企业创新研究第一阶段项目将测试一种用于跟踪受试者的手和头部的新型仪器，并将特别应用于交互式3D图形和虚拟现实的用户系统界面。一种新型的光学跟踪器将被开发出来，它使用安装在用户手和头上的红外发光二极管(LED)和配备位置传感二极管(PSD)的固定摄像头。该系统将以几千赫到几百千赫之间的不同特征频率对每个LED进行调制。LED对PSD信号的贡献将被同时测量，并由数字过滤器分开，每个过滤器都进行调整，以提取单个LED的贡献。阳光和白炽灯光源不会产生khz范围内的成分，因此会被高通滤光片拒之门外。这种设计将在高速率下获得准确的平移和旋转测量，并在手或头的快速运动中具有低相位滞后。拟议的技术将导致光学跟踪系统的开发，这些系统在不受限制的照明环境中可靠地运行，同时提供高更新率和高响应性。潜在的商业应用包括3D鼠标系统和用于交互式3D图形市场、模拟器市场和娱乐市场的头盔显示跟踪器。***

*** 9661576 DeMenthon This Small Business Innovation Research Phase I project will test a novel instrument for tracking the hand and the head of a subject, and has particular application to user-system interfaces for interactive 3D graphics and virtual reality. A novel optical tracker using infrared Light Emitting Diodes (LEDs) mounted on the hand and head of the user and a fixed camera equipped with a position sensing diode (PSD) will be developed. The system will modulate each LED at a distinct characteristic frequency from several kHz to several hundred kHz. The contributions from the LEDs to the PSD signal will all be measured simultaneously and separated by digital filters, each tuned to extract the contribution of a single LED. Sunlight and incandescent light sources do not produce components in the kHz range and will be rejected by high pass filters. This design will obtain accurate translation and rotation measurements at high rate, and with a low phase lag during rapid hand or head motion. The proposed technology will result in the development of optical tracking systems which perform reliably in unconstrained lighting environments, while providing high update rates and high responsiveness. Potential commercial applications include 3D mouse systems and Head Mounted Display trackers for the interactive 3D graphics market, the simulator market, and the entertainment market. ***