大家好！ LlX{#R  
有關Grid Distortion的問題，我設設計超短焦距投影鏡頭的時候，我發(fā)現Field Curvature and Distortion Plot和Grid Distortion相差很大，Grid Distortion在選擇最大視場是畸變?yōu)?3%，尓Field Curvature and Distortion Plot里的Distortion在-2%到+2%之間，見圖，有漸暈。 HHDl8lo  
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請問：我怎么用優(yōu)化算子優(yōu)化呢！ 5na~@-9p  
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DIST、 DIMX、 DISC、 DISG我都用了，還是不行，望大家給予指導！謝謝！ dP#|$1  

仔細查閱zemax的定義的畸變和網格畸變

畸變沒有問題

Grid Distortion視場選擇有問題

Zemax裏的說明，Grid Distortion不適用於field為real image height及半視場角>=90度的情形。 )Ub_@)X3%l  
樓主是否正好是這種情形? $w)!3c4  
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ZEMAX cannot compute the distortion in the manner described here if the field type is real image height. The reason is that when using real image height, ZEMAX iterates each ray trace to find the exact field coordinate to hit the desired image coordinate; implicitly removing the distortion. As a workaround, ZEMAX automatically changes the field type from real to paraxial image height for the purposes of this computation. This change is significant if the distortion is large. Note the value for "Field Width" will then be in units of paraxial image height rather than real image height. @Ws*Q