Simulation Analysis of High Resolution Reconstruction Errors in Solar Polarization Images

The magnetic imager of ground-based solar telescope will be affected by atmospheric turbulence during polarimetry, resulting in inaccurate measurement results. By synchronously detecting the wavefront aberration, and to use deconvolution reconstruction of the sun's narrow band polarization image, the poor photons problem caused by the narrow band filter can be overcome. The high-resolution image reconstruction algorithm is applied to the reconstruction of the sun's polarized image. During the reconstruction process, inaccurate wavefront sensing result can lead to I crosstalk between the reconstructed polarization image and the real polarization signal, resulting in certain difference. To study the impact of wavefront sensing accuracy on polarization image reconstruction accuracy during the reduction, a simulation model is established in this paper to study the I crosstalk of polarimetry results under different seeing and wavefront sensing accuracy. The results indicate that the reconstruction quality of polarized images is positively correlated with the accuracy of wavefront sensing. Under certain conditions, increasing the number of frames used for image reconstruction and reducing image resolution can also reduce the I→QUV crosstalk.