Analysis of the far-field region of LEDs

Ching Cherng Sun, Wei Ting Chien, Ivan Moreno, Chih Ching Hsieh, Yi Chien Lo

研究成果: 雜誌貢獻期刊論文同行評審

91 引文 斯高帕斯(Scopus)


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.

頁(從 - 到)13918-13927
期刊Optics Express
出版狀態已出版 - 3 8月 2009


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