rzyp:就是我问一下，细光束0.7071带的子午场曲，弧矢场曲，子午彗差，弧矢彗差在哪里找啊
(2012-08-09 10:32) 
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o~`/_ + You could check "Scan Type" setting under Field Curvature/Distortion curve to either scan across x or y direction. In addition, you could use Grid Distortion, which give you an overview of distortion.
_852H$H\ hgPa6Kd For coma, it normally displays as a parabolic curve in Ray Fan plot but it can be a bit complicated to analyse if you also have other dominating aberrations. Another way to look into coma is by looking at Zernike Standard Coefficeint, the term 5 and 6 correspond to coma in y and x orientation respectively. ZERN operands should help to extract these values.
Z?h~{Mg dYJ(!V& However, these are only for the third order. Once you go higher order aberrations, the conversion between Seidel and Zernike becomes not so stright forward.
