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UVC-LED 280nm殺菌光源反射、聚焦與擴散特性之測定與分析 = Determination and Analysis of UVC-LED 280nm Germicidal Light for Reflection, Focusing and Diffusion Characteristics / 李承翰.

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摘要註

因應2013年國際「汞水俣公約(Minamata Convention on Mercury)的推動，人類積極尋求傳統汞燈以外的UVC-LED殺菌光源。近年來，環保的UVC-LED「紫外光殺菌照射技術(Ultraviolet germicidal irradiation, UVGI)」雖已成功開發並陸續應用於各產業以及COVID-19的防疫上，但迄今光轉換效率差的低輻射以及投射機理不明等問題仍為人所詬病，極需透過模組單元基本性能測定的方式，探討其投射機制以及如何改善低輻射功率的缺失，方能有效提升實務應用上的殺菌效能以及拓展UVC-LED的應用層面。 COVID-19疫情後，UVC-LED的研究雖越來越多，但大多數文獻的重點幾乎集中在殺菌效率的探討，有關投射機制以及輻射強度提升的研究則相當罕見。有鑒於此，本研究利用UV照度計、光源測試箱、光譜分析儀等設備，針對光譜以及光源之反射、聚焦與擴散、投射距離等特性進行UVC-LED模組單元(單位圓面積上佈設不同燈數與型態)之測定與分析。結果顯示：(1)在平、凸、凹透鏡的組合中，平凸透鏡有較佳的聚焦效果(提升輻射強度)，雙凹透鏡則有較大的發散現象(提升照射範圍)；(2)在不鏽鋼(HL)、鋅、鐵、不鏽鋼(4K)、鋁等五種金屬材料中，以鋁的反射效果最佳；非金屬材料的鐵氟龍(PTFE)亦具有不錯的反射效果，可作為提升輻射強度內襯材料的參考；(3)輻射強度雖隨距離衰減，但在內襯不鏽鋼(4K)反射材料後，輻射強度效能因多次反射疊加作用而有隨距離增加的現象，顯示某些因故只能提供低輻射強度的場合，若能善用反射材料的設計將會有補強的效果；(4)對於顏色的影響，白色紙提升幅射強度最為明顯，可達2.11倍，黑色紙相對較差，輻射強度明顯降低甚至衰退，顯示適當的色彩也是提升輻射強度的可行手段；(5)LED輻射強度的量測為無數多光 In response to the international "Minamata Convention on Mercury" implemented in 2013, humans have actively sought alternative UVC-LED germicidal light sources to traditional mercury lamps. In recent years, environmentally friendly UVC-LED technology, known as Ultraviolet Germicidal Irradiation (UVGI), has been successfully developed and applied in various industries as well as in COVID-19 prevention measures. However, issues such as low radiation efficiency and unclear projection mechanisms have been criticized, highlighting the need for investigation through the fundamental performance measurement of module units. This exploration aims to understand the projection mechanism and address the shortcomings of low radiation power, ultimately enhancing the practical germicidal efficacy and expanding the applications of UVC-LED technology. After the COVID-19 pandemic, there has been an increasing amount of research on UVC-LED; however, most of the literature primarily focuses on discussing the germicidal efficiency, while studies on projection mechanisms and enhancing radiation intensity are relatively scarce. In light of this, the present study utilizes equipment such as UV illuminometers, light source testing boxes, and spectral analyzers to measure and analyze the characteristics of UVC-LED module units (with varying numbers and configurations of lamps) regarding spectrum, reflection of light sources, focusing and diffusion, and projection distance. Preliminary research findings indicate the following: (1)Among the combinations of flat, convex, and concave lenses, the flat-convex lens exhibits better focusing effects (enhancing radiation intensity), while the double concave lens shows a larger divergence phenomenon (expanding the irradiation range). (2)Among five metallic materials, including stainless steel (HL), zinc, iron, stainless steel (4K), and aluminum, aluminum demonstrates the best reflective properties. The non-metallic material, polytetrafluoroethylene

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