本文对有趣的物理现象———星芒现象进行了理论与实验探究.通过对相机拍摄成像过程建立物理模型，利用夫琅禾费衍射理论对星芒产生的过程行了理论分析.然后从理论和实验上对比探究了相机光圈形状、光圈大小、入射光波长、相机和光源的距离等因素对星芒形成的影响.最后给出了在夜晚拍出明显星芒的建议.

In this paper， the interesting phenomenon of star-burst ( which arose from the pictures taken from bulbs at night) is investigated theoretically and experimentally. Through properly simplifying the physical model of photographing process， the star-burst is analyzed theoretically depending on Francophile diffraction theory，with the influencing factors including the aperture shape，aperture size， incident wavelength and camera distance，etc. Then the influencing factors for star-burst has been systematically studied through contrast experiments. Further comparison on the results got from theoretical and experimental methods has been methodically carried out. Finally，advice for how to obtain obvious star-burst is given.