Design a single spot UV-curing system with two-dimensional UV-LED array

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 1000～1 800 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 cm2and the back operation distance is 10cm.