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    Please use this identifier to cite or link to this item: http://ir.lib.ncu.edu.tw/handle/987654321/71592


    Title: 發光二極體航標燈之研究;The Study of LED Marine Beacons
    Authors: 任永昌;Jen,Yung-Chang
    Contributors: 光電科學與工程學系
    Keywords: 發光二極體;航標燈;LED;Marine Beacon
    Date: 2016-08-25
    Issue Date: 2016-10-13 13:19:18 (UTC+8)
    Publisher: 國立中央大學
    Abstract: 在本論文中,我們利用中場擬合法建立光源模型,並利用此光源模型分別設計出兩款航標燈用之透鏡,光源分別為砲彈型 LED 以及高功率 LED。在透鏡設計上,我們成功地將光源水平維度的光發散開以及垂直維度的光收斂到 8 至 10 度,在光源為砲彈型 LED 的案子中,我們使用單一款透鏡之設計即可應用在四種不同顏色的光源上,分別為紅光、黃光、綠光及白光,且應用的航標燈之光強度可以達到 5 海浬之規範要求、色座標量測亦可以符合國際航標協會的規範;在光源為高功率 LED 的案子中,我們設計一款具有特殊結構表面的 TIR Lens 來做為航標燈所使用之透鏡,此透鏡成功地將水平維度發散至 68 度以及垂直維度控制在 8 度。於模擬中,此款具有特殊結構表面的 TIR Lens 透鏡之光學效率為 84.2%。在距離 5 公尺處且長為 10 公尺、寬為 0.875 公尺的面積為目標面時,其光學利用率(OUF)可達到 63.5%。
    ;In this thesis, we use the mid-field algorithm to build the light source model. Based on the light source model, we respectively design the lenses for two marine beacons. 5 LED lamps and high power LED are selected as our light sources. By the process of our lens design, we successfully keep the divergence angle of the light source to diverge in the horizontal direction and converge to 8-10 degrees in the vertical direction.
    In the project of marine beacon using 5 LED lamp, we design a specific lens to be suitable for different light sources which colors are red, yellow, green, and white. Besides, by our design, the luminous intensity of the marine beacon using 5Φ LED lamp can achieve to the IALA recommendation’s requirement of 5 nautical miles. The measurement of color coordinates can also fit the IALA recommendation’s requirement.
    In the project of marine beacon using high power LED, we design a specific surface-structured TIR lens into the marine beacon. By the surface-structured TIR lens, we successfully keep the divergence angle of the high power LED to diverge to 68 degrees in the horizontal direction and converge to 8 degrees in the vertical direction. According to the simulation results, the optical efficiency of the surface-structured TIR lens is 84.2 %. Under a distance of 5 m, the optical utilization factor is 63.5 % when the area of illuminated region is 10 m * 0.875 m.
    Appears in Collections:[光電科學研究所] 博碩士論文

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