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Achieving sub-millimetre precision with a solid-state full-field heterodyning range imaging camera

Abstract
We have developed a full-field solid-state range imaging system capable of capturing range and intensity data simultaneously for every pixel in a scene with sub-millimetre range precision. The system is based on indirect time-of-flight measurements by heterodyning intensity-modulated illumination with a gain modulation intensified digital video camera. Sub-millimetre precision to beyond 5 m and 2 mm precision out to 12 m has been achieved. In this paper, we describe the new sub-millimetre class range imaging system in detail, and review the important aspects that have been instrumental in achieving high precision ranging. We also present the results of performance characterization experiments and a method of resolving the range ambiguity problem associated with homodyne and heterodyne ranging systems.
Type
Journal Article
Type of thesis
Series
Citation
Dorrington, A. A., Cree, M. J., Payne, A. D., Conroy, R. M. & Carnegie, D. A. (2007). Achieving sub-millimetre precision with a solid-state full-field heterodyning range imaging camera. Measurement Science and Technology, 18(9), 2809-2816.
Date
2007
Publisher
Institute of Physics Publishing
Degree
Supervisors
Rights
This article has been published in the journal: Measurement Science and Technology. ©2007 IOP Publishing.