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. 2016 Dec 19;16(12):2185. doi: 10.3390/s16122185

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© 2016 by the authors; licensee MDPI, Basel, Switzerland.

This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC-BY) license (http://creativecommons.org/licenses/by/4.0/).

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Intensity distributions on the targets obtained using the fisheye lens system. The light illumination profiles when LED light was placed in the (a) center, (b) horizontal, (c) vertical, and (d) diagonal positions.

Intensity distributions on the targets obtained using the fisheye lens system. The light illumination profiles when LED light was placed in the (a) center, (b) horizontal, (c) vertical, and (d) diagonal positions.