Three-dimensional measurement of light-emitting diode radiation pattern: a rapid estimation

Please use this identifier to cite or link to this item: http://ir.lib.ncu.edu.tw/handle/987654321/28167

Title:	Three-dimensional measurement of light-emitting diode radiation pattern: a rapid estimation
Authors:	Moreno,I;Sun,CC
Contributors:	光電科學研究所
Keywords:	INTENSITY;CALIBRATION;SYSTEMS
Date:	2009
Issue Date:	2010-06-29 19:42:51 (UTC+8)
Publisher:	中央大學
Abstract:	We describe a simple imaging technique that enables a three-dimensional inspection of the angular intensity distribution of a light-emitting diode (LED) over a significant part of the hemisphere. The measurement set-up is very simple: it consists of only a charge-coupled device (CCD) camera and a flat diffuse translucent screen. An LED illuminates the screen, and the CCD camera records one image from the back. The visualization algorithm takes into account the cosine-fourth law, vignetting and screen transmittance to render the far-field radiation pattern from the recorded image.
Relation:	MEASUREMENT SCIENCE & TECHNOLOGY
Appears in Collections:	[Graduate Institute of Optics and Photonics] journal & Dissertation

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