[KSCI] Korea Science Citation Index Service

One Idea on a Three Dimensional Measuring System Using Light Intensity Modulation

Fujimoto Ikumatsu (School of Mechanical and Control Engineering, Sun Moon University)
Cho In-Ho (Sun Moon University)
Pak Jeong-Hyeon (School of Mechanical and Control Engineering, Sun Moon University)
Pyoun Young-Sik (School of Mechanical and Control Engineering, Sun Moon University)

Publication Information

International Journal of Control, Automation, and Systems / v.3, no.1, 2005 , pp. 130-136 More about this Journal

Abstract

A new optical digitizing system for determining the position of a cursor in three dimensions(3D) and an experimental device for its measurement are presented. A semi-passive system using light intensity modulation, a technology that is well known in radar ranging, is employed in order to overcome precision limitations imposed by background light. This system consists of a charge-coupled device camera placed before a rotating mirror and a light-emitting diode whose intensity is modulated. Using a Fresnel pattern for light modulation, it is verified that a substantial improvement of the signal to noise ratio is realized for the background noise and that a resolution of less than a single pixel can be achieved. This opens the doorway to the realization of high precision 3D digitized measurement. We further propose that a 3D position measurement with a monocular optical system can be realized by a numerical experiment if a linear-period modulated waveform is adopted as the light-modulating one.

Keywords

3D position measurement; rotating scanning mechanism; Fresnel diffraction pattern; light intensity modulation; linear-period modulation;

Citations & Related Records

Times Cited By Web Of Science : 0 (Related Records In Web of Science)
Times Cited By SCOPUS : 0

Reference

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