高功率LED 照明之二次光學設計效率的研究

The study of optical efficiency for secondary optical design for high-power LED lighting

羅翊戩(Yi-Chien Lo)

指導教授 ： 孫慶成

國立中央大學/理學院/光電科學研究所/博士(2011年)

摘要

本論文主要探討發光二極體應用照明燈具上之光學效率及光學有效利用率之分析，並且於不同設計中考慮其他要求的光學品質之變化。首先，在探討準直光系統中，我們發現晶片尺寸以及二階光學機構大小對於光學效率及光學有效利用率有極大的影響。而具截止線之燈具中，發散角越小的區域攔截到的能量越多，法規面上強點與光學有效利用率將被提升。而散光形設計，雙反射式具微結構之設計不但可以得到柔和之光形且眩光值較低；而全反射式透鏡將有利於路燈這類需要大面積之照明，其可滿足北美法規之之均勻度要求。

關鍵字

光學有效利用率 ； 發光二極體 ； 二次光學設計 ； 光學效率

並列摘要

In this dissertation, we discuss the optical efficiency and optical utilization factor about the lighting application which based on high power LEDs. Afterwards, we also discuss the variation about other optical requirements in each different case. First, we find out the optical efficiency and optical utilization factor depend on the chip size and the structure size of the optical module in the collimator system. Then, we discuss the optical module with high contrast. The intercepted energy in the area with small extended angle become relatively higher, the optical utilization factor and the illuminance of the hot spot in the regulation plane become higher as well. In the wide-angle design, the double-reflector module with multi-segment not only gives a smoothing pattern, but also prevents the glare effect. At last, we introduce a wide-angle lens. It can meet the uniformity of the regulation by IESNA.

並列關鍵字

LED ； Optical design ； Optical efficiency ； Optical utilization factor

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