【摘要】 新型大功率紫外LED具有电光转化效率高、光谱纯度高和体积小等优点,但单管LED功率仍很难满足光固化的要求,针对单光斑辐照要求,提出采用空间阵列UV-LED排布实现能量累加的方案。该方案通过单管LED聚光系统与集成阵列系统综合设计实现了各单元单光斑辐照度在辐照面上的合成,最终得到的光斑辐照度分布均匀、尺寸合理,阵列系统后工作距离长,完全满足现场应用的具体指标要求。通过外围电子线路控制阵列LED的电流强度及通断状态可实现光斑辐照度在(1000～1800)mW/cm2可调,光斑尺寸为1cm2,后工作距离为10cm。更多还原

【Abstract】 Since the single LED can not meet the demand of UV-curing,a new solution in which the accumulation of UV radiative energy was implemented by two-dimensional LED array is proposed to utilize the advantages of the latest high-power UV-LED,such as high electro-optical conversion efficiency,high spectral purity and small volume.The irradiance combination of each single spot on the irradiated surface was realized by the combinated design of single LED focusing system and the integrated array system.The obtained spot has the merits of uniform irradiance distribution,reasonable size and long back operation distance.The spot irradiance adjustable in the range of 1 000-1 800 mW/cm2 is achieved by controlling the current and on-off state of LED array with peripheral electronics.The size of the obtained spot is 1 cm2 and the back operation distance is 10 cm.更多还原