不同入射角下的激光干扰效果研究

Laser disturbing effect under different incident angles

为了研究不同入射角下的激光干扰效果,采用逐步调节光轴指向的方法,对不同入射角下的干扰效果进行了实验研究和理论分析,取得了不同入射角下激光束在探测器上光斑位置、接收能量和光斑形状的数据。结果表明,光斑位置随入射角的增大而线性移动,对于本文中的光电成像系统而言,移动速率为入射角每增加0.1°,光斑偏离探测器中心16个像素;接收能量随入射角的增大而减小,对于本文中视场角为8°的光学系统而言,减小的幅度不超过1%;不同入射角下的激光光斑形状满足空间平移不变性。这一结果对开展激光干扰光电成像系统试验是有帮助的。

In order to investigate laser disturbing effects under different incident angles, experimental study and theoretical analysis were carried out by gradually adjusting the optical axis pointing. Spot positions, receiving energies and spot shapes of laser on the detector were achieved under different incident angles. The results show that spot positions shift linearly with the increase of incident angle. The spot would deviate 16pixel from the center of detector with the increase of 0.1° of incident angle. Receiving energy decreases with the increase of incident angle and the reduction is less than 1% for the optical system with viewing angle of 8°. Spot shape meets space shift invariance under different incident angles. The study is helpful for the experiment of laser jamming electro-optical imaging system.