基于溴钨灯和LED积分球光源的可调谐光谱分布及光谱匹配

Spectrum-tunable Distribution and Spectral Matching for Integrating Sphere Light Source Based on Bromine Tungsten Lamps and LEDs

采用溴钨灯和恒流驱动的LED混合作为积分球内部光源,提出了模拟退火算法作为光谱匹配算法,研究了光谱分布可调谐积分球光源的光谱匹配技术。仿真实验表明,该混合光源完全能够定量地模拟CIE-D65和等能光谱分布,且在辐射功率优于LED模拟结果的前提下,LED的数量分别减少79.8%和82.9%,平均相对误差分别减小10%和40.5%。给出了380～900 nm波段最大输出辐亮度不低于50 W/(m2.sr)的直径为0.5 m的光谱分布可调谐积分球光源的混光方案。实验表明,模拟退火算法和恒流驱动方案可应用于光谱分布可调谐积分球光源的工程实践。

The mixed-lamps of bromine tungsten lamps and LEDs were proposed to serve as integrating sphere inner source and LEDs were driven by constant current.Simulated Annealing（SA） algorithm was introduced to study the spectral matching technique of spectrum-tunable integrating sphere light source（STIS）.The simulation experiment indicated that mixed-lamps could not only mimic CIE-D65 and equi-energy spectra successfully,but also improve the performance of STIS.The numbers of LEDs reducing 79.8% and 82.9%,respectively,and the average relative error reducing 10% and 40.5%,comparied with LEDs simulation results.A feasible mixed-lamps scheme for Ф 0.5 m integrating sphere,whose maximal radiance between 380 nm and 900 nm is no less than 50 W/（m2·sr）.The validating experiment indicated that the SA algorithm and constant current drive mode would be feasible in STIS＇ engineering practice.