Analysis of the far-field region of LEDs

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题名:	Analysis of the far-field region of LEDs
作者:	Sun,CC;Chien,WT;Moreno,I;Hsieh,CC;Lo,YC
贡献者:	光電科學研究所
关键词:	LIGHT-EMITTING-DIODES;UNIFORM ILLUMINATION;WHITE LEDS;EFFICIENCY;ARRAYS;DESIGN;MODEL;LENS
日期:	2009
上传时间:	2010-06-29 19:40:43 (UTC+8)
出版者:	中央大學
摘要:	Versatility in the design of optical systems is one of the key features of light-emitting diodes (LEDs) that has attracted considerable attention. In the analysis of systems using LEDs, it is useful to know if the distance is far enough from the LED to allow the radiation pattern to be simulated by the point source approach. We propose three far-zone conditions for LED light modeling: the far-field distance, and for practical purposes the quasi far-field and minimum far-field distances. Different types of LEDs have different far-field ranges. We analyze these differences by modulating key parameters like geometrical structure of encapsulating lens, chip size, chip shape, chip position, and package errors. We find that far-field region considerably depends more on the shape of both lens and chip than all other parameters. (C) 2009 Optical Society of America
關聯:	OPTICS EXPRESS
显示于类别:	[光電科學研究所] 期刊論文

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