English  |  正體中文  |  简体中文  |  Items with full text/Total items : 78345/78345 (100%)
Visitors : 32500931      Online Users : 1171
RC Version 7.0 © Powered By DSPACE, MIT. Enhanced by NTU Library IR team.
Scope Tips:
  • please add "double quotation mark" for query phrases to get precise results
  • please goto advance search for comprehansive author search
  • Adv. Search
    HomeLoginUploadHelpAboutAdminister Goto mobile version

    Please use this identifier to cite or link to this item: http://ir.lib.ncu.edu.tw/handle/987654321/43836

    Title: 高指向性LED外腔式光源機構之研究;Study of High-Directional LED with External Cavity
    Authors: 楊双豪;Shuang-hao Yang
    Contributors: 光電科學研究所
    Keywords: 光展量;耦合效率;光子回收;薄膜型氮化鎵LED;表面結構;É;tendue;Coupling Efficiency;Photon Recycle;ThinGaN LED;Surface Texture
    Date: 2010-07-29
    Issue Date: 2010-12-08 14:22:29 (UTC+8)
    Publisher: 國立中央大學
    Abstract: 本研究中,我們利用具有表面微結構之薄膜型氮化鎵LED搭配外腔式光源機構,設計出高指向性之光源機構模型。首先,針對氮化鎵LED的幾何結構以及光學特性進行量測,並經由此實驗數據建立出相似度高達99.8%的LED光學模型。接著利用此模型設計一外腔式光源機構,使LED的光線發散角得以從±90°縮小至±30°以內,並計算出光耦合效率、能量提升比例以及散角分佈。最後,我們將此光源機構的實驗數據與模擬結果一一進行比較與探討,進而得到一高精準度之外腔式光源機構模型,而此模型也有利於之後進一步優化的設計。 In this thesis, we incorporate an external cavity with the surface texture for ThinGaN LEDs to obtain a high-directional light source. First of all, we measure the geometric structure on the top surface of ThinGaN LEDs and the characteristic of optical parameters. According to the information, we build up a precise optical model of ThinGaN LED to design an external cavity with special light cone of 30°, which is different from 90° of general LEDs. The output coupling efficiency, enhancement ratio, and spatial distribution are analyzed. Finally, we compare the experiment results with the simulation, and the characteristic of the new light source is discussed.
    Appears in Collections:[光電科學研究所] 博碩士論文

    Files in This Item:

    File Description SizeFormat

    All items in NCUIR are protected by copyright, with all rights reserved.

    社群 sharing

    ::: Copyright National Central University. | 國立中央大學圖書館版權所有 | 收藏本站 | 設為首頁 | 最佳瀏覽畫面: 1024*768 | 建站日期:8-24-2009 :::
    DSpace Software Copyright © 2002-2004  MIT &  Hewlett-Packard  /   Enhanced by   NTU Library IR team Copyright ©   - 隱私權政策聲明