非對稱Fresnel透鏡應用於LED方向燈設計

LED Direction Indicators Design with Asymmetric Fresnel Lens

劉源昌(Yuan-Chang Liou) ； 陳世寬(Shin-Kuan Chen) ； 林本翔(Pen-Hsiag Lin)

《科儀新知》 181期 (2011/04) Pp. 86-92

https://doi.org/10.29662/IT.201104.0010

摘要

本文目的是非對稱Fresnel透鏡搭配LED應用於歐規新修訂之ECE R6汽車方向燈的光學設計，並藉由ASAP光學設計分析軟體來模擬配光。結果顯示非對稱Fresnel透鏡搭配Lambertian LED可產生左右約20度、上下約10度的非對稱配光，LED最低流明數需求僅38-55 1m，可比「薄」平凸透鏡的設計方式來得低一些，也比一般汽車常用方向燈傳統光源白熾燈泡低很多。

並列摘要

The paper presents the LED direction indicators design with asymmetric Fresnel lens, which meets the ECE R6 criterion. The opto-mechanical design software, ASAP, is adopted for the analysis of light flux. The results show that Lambertian LED and the asymmetric Fresnel lens can produce an asymmetric lightspot which is about 20 degree in horizontal and 10 degree in vertical. Therefore, the minimum requirement of LED light flux is 38-55 lm lower in the design; it is lower than that for thin flat-convex lens, and much lower than the traditional bulb P21 W.