基于微透镜阵列的激光引信抗气溶胶干扰方法

Anti-Interference Method of Laser Fuze in Aerosol Based on Microlens Array

为了提高大视场激光引信抗气溶胶环境干扰的能力,提出基于微透镜阵列的激光引信抗气溶胶干扰方法,就是在大视场激光引信中,通过微透镜阵列对激光发射光束进行分束,形成离散化照明光束,在保持引信所要求的探测视场前提下,压缩发射光束光斑截面尺寸,以增强目标回波功率、减小烟雾等气溶胶后向散射干扰,提升信噪比,从而提高激光引信抗气溶胶环境干扰的能力;仿真结果表明:激光发射光束从泛光照明改为离散化照明后,烟雾气溶胶后向散射干扰明显减小,同时目标回波功率也有一定的提升,提升了信噪比,从而可以提高激光引信抗烟雾等气溶胶干扰的能力。

An anti-interference method of laser fuze in aerosol based on microlens array was put forward to improve the ability of anti-interference of large field laser fuze. The laser beam of large field laser fuze was splited by microlens array and became discrete laser beams. In the premise of maintaining the fuze detection field required, compressing the spot section size of laser beam, we aimed to enhance target echo power and reduce the smoke aerosol backscatter interference, and then enhanced the signal-noise ratio to improve the ability of anti-interference of large field laser fuze in aerosol environment. The results of the simulations showed that after laser beam becoming discrete beams illumination from floodlighting, the smoke aerosol backscatter interference significantly reduced and the target echo power had a bit of promotion at the same time, so that the signal-noise ratio was enhanced. Therefore, the mothed could improve the ability of antiinterference of large field laser fuze in aerosol environment.