Measuring Distance by Angular Domain Filtering

Wei-Jun Chen

Abstract

In this paper a paraxial imaging system with incoherent illumination is interpreted as a signal processing system in which a thin lens performs a forward angular transform on light rays traveling through it. Inverse angular transform exists and could be performed by another thin lens which coincides its focus plane with the first. The common focus plane acts as an angular domain, on which filtering is possible by placing aperture stops. A symmetrically angular filtering results in a direct correspondence between a recorded signal and its object distance. Such a “transform–filtering–inverse transform” system could be understood as a modified tele–centric system, with which a novel concept for measuring a distance without focusing on the target is suggested.

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Paper Citation


in Harvard Style

Chen W. (2015). Measuring Distance by Angular Domain Filtering . In Proceedings of the 3rd International Conference on Photonics, Optics and Laser Technology - Volume 1: PHOTOPTICS, ISBN 978-989-758-092-5, pages 85-90. DOI: 10.5220/0005336400850090


in Bibtex Style

@conference{photoptics15,
author={Wei-Jun Chen},
title={Measuring Distance by Angular Domain Filtering},
booktitle={Proceedings of the 3rd International Conference on Photonics, Optics and Laser Technology - Volume 1: PHOTOPTICS,},
year={2015},
pages={85-90},
publisher={SciTePress},
organization={INSTICC},
doi={10.5220/0005336400850090},
isbn={978-989-758-092-5},
}


in EndNote Style

TY - CONF
JO - Proceedings of the 3rd International Conference on Photonics, Optics and Laser Technology - Volume 1: PHOTOPTICS,
TI - Measuring Distance by Angular Domain Filtering
SN - 978-989-758-092-5
AU - Chen W.
PY - 2015
SP - 85
EP - 90
DO - 10.5220/0005336400850090