设计了一种基于蓝绿光发光二极管光源的黄疸光疗仪光源系统。根据光线在皮肤和组织中的传递过程及胆红素和光红素之间的转化过程,通过光谱匹配,建立与目标光谱匹配度较高的光源光谱。对光源阵列进行设计和仿真,建立了光源系统,并进行照度测试,照度平均值达32.9 μW·cm ^-2·nm ^-1,均匀度达81%。为进一步提高光源系统均匀度,在光源系统中采用菲涅耳透镜阵列,当菲涅耳透镜的环距为1 mm、透镜到光源的距离为1 cm时,均匀度提升至85%,照度为31 μW·cm ^-2·nm ^-1,与设计要求相符。

This study proposes a blue-green light-emitting diode light source system for jaundice phototherapy instrument. Based on the process of light transmission through skin and tissues and the process of conversion between bilirubin and phosgene, a light spectrum with a higher matching degree to the target spectrum is established via the spectral matching method. In addition, the light source array is designed and simulated, followed by the fabrication and illumination test of the corresponding light source system. The results indicate that the system achieves an average illumination of 32.9 μW·cm -2·nm -1 with 81% uniformity. The uniformity is further improved by adding a Fresnel lens array to the light source system. When the ring distance of the Fresnel lens is 1 mm and the distance from the lens to the light source is 1 cm, the uniformity is increased to 85% and the illuminance is 31 μW·cm -2·nm -1 , which are in accordance with the design requirements.