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Improved 3D Interactive Devices for Passive and Active Stereo Virtual Environments

This paper introduces a new set of tracking devices for 3D virtual environment interaction and reviews enhancements including device miniaturization, power reduction, and ruggedization. The goal of these improvements was to reduce size and weight of head-worn tracking devices for use with passive-stereo immersive display systems, whose polarized glasses are much smaller than LCD shutter glasses and therefore require smaller tracking sensors. The major changes include a 2-fold reduction in the size and weight of the wearable sensor devices and improvement of wireless tracking capability and battery life.