Staticaberration correction technique for adaptive optics system based on focal-plane copy approach

A key factor limiting the performance of Adaptive Optics (AO) systems is the Non-Common Path Aberration (NCPA) caused by the difference between the wavefront sensor path and the science imaging path. Meanwhile, a static aberration will inevitably be introduced in the common path of the AO system. This paper proposes a correction technology based on a copy of the focal-plane Point Spread Function (PSF) to correct static aberration in the scientific imaging path of AO systems. This technology uses the PSF generated by the laser point light source as the reference PSF, and copies that to the science imaging path of the AO system through iterative optimization algorithms. Experimental results show that the Strehl Ratio (SR) increases from the initial 0.312 to 0.995 after correction. This technology can still stably and quickly obtain global optimization results, especially when the initial static aberration of the system is large.