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http://dx.doi.org/10.3807/HKH.2008.19.4.302

Visual Measurement of Rotational Displacements by Using Two Different Moire Fringes Simultaneously Generated by Repeated Sinusoidal Gratings  

Jeong, Youn-Hong (Dept. of Applied Optics and Electromagnetics, Hannam University)
Oh, Jeong-Hyo (Dept. of Applied Optics and Electromagnetics, Hannam University)
Jo, Jae-Heung (Dept. of Applied Optics and Electromagnetics, Hannam University)
Publication Information
Korean Journal of Optics and Photonics / v.19, no.4, 2008 , pp. 302-309 More about this Journal
Abstract
We present the precise visual measurement method of rotational displacements using two different moire fringes simultaneously generated by repeated sinusoidal gratings. We investigate the variation of moire fringes depending on rotational displacements through computer simulation and experiment using a rotator in detail. The moire fringes are composed of the wide linear fringe part with a long period and the narrow linear fringe part with a short period. These parts are superior to the angle detection of more than 12 degrees and less than 12 degree, respectively. Additionally, the method can be visually used in the determination of the rotational direction by observing the moire fringe's direction.
Keywords
Repeated sinusoidal grating; Moire fringes; Rotational displacement; Angle measurements;
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Times Cited By KSCI : 1  (Citation Analysis)
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