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    Please use this identifier to cite or link to this item: http://ir.lib.ncu.edu.tw/handle/987654321/68410

    Title: 高光效多功能 LED 投射光形之研究;A Study on Illumination Light Pattern of High Performance and Multi-functional LED Projection Lamps
    Authors: 蔡直佑;Cai,Jhih-You
    Contributors: 光電科學與工程學系
    Keywords: LEDs;光展量;等效光通量密度;投射光形;二階光學設計;投射距離;對比光形;LDs;pcW-LEDs;étendue;exitance;projection;contrast;LDs
    Date: 2015-08-28
    Issue Date: 2015-09-23 11:33:26 (UTC+8)
    Publisher: 國立中央大學
    Abstract: 本論文中,我們先以一般市售高功率白光 LEDs 為光源,分析其光源之光學特性,其中包含光源的光展量之計算與等效光通量密度之分析,並評價光源對投射光形的照明之影響。本論文發展出可用於大尺寸的可變投射光形之設計,搭配合適二階光學設計與適用於該光學系統的 LEDs 光源,使該投射光形之照明燈具,達到具有高投射距離之功效,並兼顧光形可變的廣泛照明。另一方面,具有對比光形的投射照明亦為本論文之研究,相對前者需同時兼顧光形的對比度與中心照度,其設計更為困難,而如何達到具有高光效之照明設計,光源本身的光展量與光通量密度之評估更為重要。本論文的最後一節,將評估具有低光展量與高光通量密度特性的白光 LDs 光源,其對投射光形的照明影響。;In this thesis, we have successfully analyzed optical performances on the basis of commercial high power pcW-LEDs. The analysis includes the étendue and exitance of the light source, and it can be utilized to estimate the quality of light sources to the illumination of projection lighting applications. In the thesis, a design of projection lamp with adjustable properties which can alter the light pattern. Accordingly, with well-designed secondary optical components, as well as proper LED light sources into the optical system, the highly optical performance can be achieved. On the other hand, the importance of the design of projection lamp with the high contrast property cannot be overestimated. Consequently, the thesis also considers the optical performances in LED light sources to fulfill the light pattern with high contrast and central illuminance. Finally, the estimation of white LDs with low étendue and high exitance has also been applied and analyzed for projection lighting.
    Appears in Collections:[光電科學研究所] 博碩士論文

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