@inproceedings{788ff802133249adbe206f4f4bceafd0,
title = "Using liquid lenses to extend the operating range of a remote gaze tracking system",
abstract = "Remote eye tracking systems are widely used evaluation tools in many disciplines. Such systems have to deal with free head motions that cause a defocussing of the camera image. Hence, remote eye tracking systems usually have a limited operating range. This contribution presents a novel auto-focus setup for a small and mobile remote gaze tracking system that enables a clear eye image acquisition in a large operating range. Therefore, our setup uses a miniature liquid lens to achieve smallest possible focusing latencies and installation space. Using this technology, we extended the eye tracking system's operating range to distances from 0.6 m up to 1.3 m, with a mean accuracy of 0.45° in 4 exemplary working distances.",
keywords = "Auto-focus, Eye tracking, Focusing, Gaze tracking, Liquid lens",
author = "T. Poitschke and E. Bay and F. Laquai and G. Rigoll and S. Bardins and K. Bartl and J. Vockeroth and E. Schneider",
year = "2009",
doi = "10.1109/ICSMC.2009.5345907",
language = "English",
isbn = "9781424427949",
series = "Conference Proceedings - IEEE International Conference on Systems, Man and Cybernetics",
publisher = "Institute of Electrical and Electronics Engineers Inc.",
pages = "1250--1254",
booktitle = "Proceedings 2009 IEEE International Conference on Systems, Man and Cybernetics, SMC 2009",
note = "2009 IEEE International Conference on Systems, Man and Cybernetics, SMC 2009 ; Conference date: 11-10-2009 Through 14-10-2009",
}