LED照明用之二次光學透鏡最佳化設計

Optimization of Secondary Optical Lens Design for LED Lighting

林奇鋒(Chi-Feng Lin) ； 方育斌(Yu-Bin Fang) ； 楊博華(Po-Hua Yang)

《科儀新知》 188期 (2012/06) Pp. 34-39

https://doi.org/10.29662/IT.201206.0004

摘要

本研究利用模式搜尋法最佳化LED照明之二次光學透鏡。在假設點光源條件之下，利用能量轉換關係與斯乃爾定理，可建構出具有均勻照度功能的光學透鏡。然而，因為尺寸效應的存在，實際的LED光源燈具還是會造成照度不均的現象。放大LED透鏡尺寸則可消除LED尺寸效應，但會影響燈具的機構配置與增加透鏡的製造成本。因此本研究使用模式搜尋法修正LED光學透鏡之設計參數，降低LED的尺寸效應讓燈具維持高均勻照明，並達到縮小透鏡尺寸的目的。

並列摘要

In this study, pattern search was used to optimize the secondary optical lens for LED lighting. Under the assumption of point light source, the lens with uniform illumination can be constructed by using energy mapping relationship and Snell's law. However, the non-uniform illumination is found in the luminaire designed with LED light source due to the size effect. Although larger LED lens can eliminate the size effect, the drawbacks are complex mechanical assembly of luminaire and higher production cost. Therefore, the pattern search was implemented to adjust the designed parameters of lens for keeping a uniform illumination without increasing the size of lens, so that the size effect of LED is less obvious.