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) 
e `JWY9%
G|t0no\f 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.
c*R\fQd 23ho uS 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.
QAl 4w)F muK.x7zyl 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.
