Owing to the high temporal coherence and spatial coherence of laser, it has been considered as the perfect source to study light’s interference effect so far. The simulation method of multi-beam interference effect was proposed based on the maturity Gaussian optics in this paper. The simulation result and stripe’s equidistant distribution of the dual-beam interference effect agreed with that of Yang’s double slit interference well. The agreement strongly proved that the simulation method was right and feasible. The simulation results have showed that the triple-beam interference effect was hexagonal arrangement’s lattice distribution; the quadruple-beam interference effect was foursquare arrangement’s lattice distribution; the pentuple-beam interference effect was radially symmetrical lattice distribution; and the hextuple-beam interference effect was regularly hexagonal arrangement’s lattice distribution. Every lattice around the center spot was all circular in the quadruple-beam and hextuple-beam interference effect.
Owing to the limitation of optoelectric imaging systems’ pupil, it is inevitable to generate the diffraction effect in laser propagation; however, the laser energy distribution causing by the diffraction effect can directly affect the jamming effect to optoelectric imaging systems. First of all, we began with the basal Huygens-Fresnel principle and Fresnel-Kirchhoff diffraction formula in this paper, and deduced the laser energy distribution formula on the optoelectric imaging systems’ detector causing by the rectangular pupil, circular pupil and annulus pupil. Secondly, we simulated the laser energy distribution causing by the diffraction effect under the different pupil shapes, laser launch parameters, optical system’s parameters and optoelectric detector’s parameters, and investigated the laser energy distribution rule under the different conditions. The simulation results indicated that the range of intensity distribution increased with laser wavelength, laser incident energy, focal length and the size of pupil that also can affect the pattern of intensity distribution. The research fruits can provide the theoretical basis and technical support for evaluating laser jamming effect to optoelectric imaging systems.
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