1National Astronomical Observatories/Nanjing Institute of Astronomical Optics and Technology, Chinese Academy of Sciences, Nanjing 210042, China
2Key Laboratory of Astronomical Optics & Technology, Nanjing Institute of Astronomical Optics and Technology, Chinese Academy of Sciences, Nanjing 210042, China
Fig. 6. Residual astigmatism and coma field behavior (the arrows on the maps show the amplitude and direction of the aberrations sampling from various fields).