Simulated Study On Influence Of Atmospheric Turbulence On The Performance Of Correlated Imaging

Correlated imaging has many advantages such as object image separation,strong anti-noise performance,low light source requirements and single-pixel imaging,so it is widely used in various fields.But in the process of practical application,it will be interfered by atmospheric environment,such as atmospheric turbulence.Therefore,it is of practical significance to study the correlated imaging in the atmospheric turbulent environment to help the correlated imaging into practical application.First,the phase screen of atmospheric turbulence is constructed by numerical simulation of spectral inversion,and constructing the constructed atmospheric turbulence phase screen into the associated imaging system model,Full-link simulation of correlated imaging in atmospheric turbulence.Research shows that the phase screen of atmospheric turbulence constructed based on Tatarskii power spectrum inversion is most consistent with the theoretical value.The beam quality deteriorates severely with the increase of turbulence intensity.The simulation results also verify that the turbulence of the Light-Source-to-Object path on the signal path has a much greater impact on the imaging performance than the turbulence effect on the Object-to-Single-Pixel Bucket-Detector path.And the simulation study of correlated imaging in real application scenarios is carried out.Three models of correlation imaging in the presence of atmospheric turbulence were used for simulation.It is found that atmospheric turbulence only affects the emission path from the source to the object in the correlated imaging system,and other paths have little or no impact.Secondly,the simulation study of the influence of atmospheric turbulence on the correlated imaging performance is carried out,including resolution and signal-to-noise ratio.The simulation results show that with the increase of turbulence intensity,the imaging quality of the associated imaging is significantly reduced,and the contrast-to-noise ratio is also rapidly reduced.Especially in the strong turbulent region,the falling velocity is significantly increased.As the turbulence intensity increases,the image resolution also deteriorates significantly.In the case of C_n²（28）25.?10^-41m^-23moderate turbulence,the image is difficult to distinguish.Finally,based on the parameters of the associated imaging model in the construction of atmospheric turbulence,the imaging performance is optimized.Based on the three turbulence phase screens of the three power spectra,three kinds of statistically distributed speckle fields are combined to construct the nine model simulation of the correlation imaging in atmospheric turbulent environments.The research shows that the simulation model based on Kolmogorov power spectrum simulating atmospheric turbulence and using negative exponential distribution as the source of correlated imaging makes the contrast ratio of imaging to be the largest.The effect of the particle size of the six speckle sources on the resolution of the associated imaging is given,The results show that the effect of the speckle size of the source on the resolution of the associated imaging is not monotonic,so choosing the appropriate speckle size is critical to improving imaging performance.