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提出一种利用准平行光干涉进行激光干扰的方案。在干涉理论分析的基础上,利用He-Ne激光实验得到2路、3路、4路的多光束准平行光干涉图像与干涉强度极大值,并仿真得出准平行光干涉图像和干涉光强分布。实验和仿真表明:准平行光干涉的图样的形状取决于光束的方向角。在某些方向角时,干涉视场的中央可出现干涉亮纹或亮斑。干涉条纹或干涉光斑之间的间距由两两光束之间的夹角所确定。在不大于0.5 mrad范围内,两两光束间夹角的实验数据与仿真数据近似一致,并且干涉亮纹或亮斑的强度极大值接近理论最大值,即2束、3束、4束准平行光的干涉强度最大值分别是单束光强的4倍、8倍、15倍。给出干扰方案的效果评估以及干扰有效性的验证。
Proposed a quasi-parallel optical interference laser interference program. Based on the analysis of interference theory, the interferometric images and interference intensity of 2, 3, 4 multi-beam quasi-parallel light beams were obtained by He-Ne laser experiment. The results showed that quasi-parallel light interference images and interference light Strong distribution. Experiments and simulations show that the shape of the pattern of quasi-parallel light interference depends on the direction angle of the beam. At certain azimuthal angles, interference fringes or bright spots may appear in the center of the interfering field of view. The spacing between interference fringes or interference spots is determined by the angle between the two beams. In the range of not more than 0.5 mrad, the experimental data of the angle between the two beams are approximately the same as the simulation data, and the maximum intensity of interference fringes or bright spots is close to the theoretical maximum value, that is, two beams, three beams and four beams The maximum interference intensity of parallel light is 4 times, 8 times and 15 times of that of single beam. The effectiveness evaluation of jamming schemes and the verification of jamming effectiveness are given.