黑光灯光场分布的计算与模拟

基于光度学的相关知识，对农业生产和研究中广泛使用的黑光灯在平面上的光强分布进行了分析计算和实际测量，并利用Matlab进行了计算机模拟仿真。建立了黑光灯的物理模型，通过合理的假设，推导出了在工作平面上各点辐照度的计算公式。模拟仿真和试验结果表明黑光灯在打开1 h后，光强的分布明显趋于稳定，在10 cm外的工作平面上可以获得约30 cm×20 cm的光强变化在12.5%以内的较均匀的矩形光场。试验与仿真结果表明采用紫外LED光源阵列替代黑光灯可以明显改进光场的均匀性和稳定性。

Computation and simulation of intensity distribution of black light lamp

Based on the relevant knowledge of photometry, the intensity distribution of a black light lamp on work platform was computed and measured, then simulated by using Matlab. A physical model of the black light lamp was established and the formula of radiated intensity was deduced at each point of the work platform via some reasonable assumptions. The simulation and experimental result clearly showed that one hour after the black light lamp had been switched on, the distribution of light intensity was gradually stabilized and a 30cm×20cm steady rectangle light field varying within 12.5% could be obtained. Furthermore, the result manifested that using the LED light source array instead of the black light lamp could obviously improve the uniformity and stability of the intensity distribution of the light field.