曲面近场发光二极管阵列照度均匀性分析与设计

Analysis and Design of Illumination Uniformity of Curved Near-Field Light Emitting Diode Array

健康医疗领域中往往需要曲面光源照射曲面被测物,如何设计发光二极管(LED)阵列,使其产生均匀的照度分布具有一定的研究意义。为此,将柱面LED曲面面阵分成两部分,直线LED阵列和环形LED阵列。对曲面LED阵列光源和柱状曲面目标接收面的光场分布构建了反映照度分布的目标函数,确定了环形LED阵列的照度均匀性由LED灯珠的光辐射参数、灯珠阵列曲面半径、接收曲面半径和相邻两灯珠之间的夹角决定。采用TracePro光线追迹法分别计算了两种阵列的照度分布情况,通过优化LED曲面面阵排布,在柱面目标面上产生了均匀的照度分布。

In the field of health care,curved surface light sources are often required to illuminate the surface of the test object.It is of research significance to design a light-emitting diode(LED)array to produce uniform illumination distribution.In this paper,the cylindrical LED surface array is divided into two parts,a linear LED array and a circular LED array.The objective function distribution is constructed for the light field distribution of the curved LED array source and the column-shaped surface target receiving surface.The illumination uniformity of the illumination of the annular LED array is determined by the optical radiation parameters of the LED lamp beads,the lamp array surface radius,the receiving surface radius,and the angle between adjacent two lamp beads.The illuminance distribution of the two arrays is calculated by TracePro ray tracing method.By optimizing the arrangement of the LED surface array,a uniform illumination distribution is obtained on the cylindrical target surface.