紫外LED圆环阵列均匀照明的实现方法  

Realization of uniform illumination of UV LED circle array

作　　者：肖韶荣[1] 杨丽[2] 吴群勇[2] 尚国庆[2] 

机构地区：[1]南京信息工程大学物理与光电工程学院,江苏南京210044 [2]南京信息工程大学电子与信息工程学院,江苏南京210044

出　　处：《应用光学》2013年第5期742-747,共6页Journal of Applied Optics

基　　金：科技部公益性(气象)行业专项:GYHY201203067;江苏省科技支撑计划:BE2010733

摘　　要：为构造指纹荧光检测中所需的均匀照明紫外光源,选择紫外LED阵列照明。采用光电探测器检测单颗LED的辐射角分布,拟合单个LED角分布函数;用8颗LED均匀置于半径为10mm的圆环上,在圆环上方5mm处的中心轴上放置一个LED;在给定的观察屏上照度不均匀误差下,根据斯派罗法则,确定观测屏与圆环阵列之间的距离,从而实现LED圆环阵列的照度分布均匀化。也可以给定观测屏到圆环的距离,确定轴上LED放置点到圆环的距离。实验结果表明,观测屏到圆环距离为11.0cm时,在半径为10.0mm的圆域内,照度不均匀相对误差小于1.27%。Ultraviolet （UV） LED array illumination was chosen for constructing uniform illumi- nation ultraviolet light source required in the fingerprint fluorescence detection. The angular distribution of single LED radiation was tested by using photoelectric detector, and the angular distribution function of single LED was fitted. Eight LEDs were placed on the circle with radi- us of 10 mm evenly, and a LED was placed in the center shaft 5 mm above the circle. For a given observation screen under the uneven illumination error, according to the laws of the Spy- ro, the distance between the viewer and the circle array was determined and then the uniform illuminance distribution of LED circle array was realized, when the distance from observation screen to circle was given, the distance between the LED placed point on axis of the circle to the circle could be determined too. Experimental results show that the distance from the obser- vation screen to the circle is 11.0 cm, the relative error of uneven illumination is less than 1.27% within a circle with radius of 10.0 ram.

关 键 词：LED圆环阵列 斯派罗法则 均匀照度 

分 类 号：TN205[电子电信—物理电子学]