大家好！ 3N]ushMO  
有關(guān)Grid Distortion的問題，我設(shè)設(shè)計(jì)超短焦距投影鏡頭的時(shí)候，我發(fā)現(xiàn)Field Curvature and Distortion Plot和Grid Distortion相差很大，Grid Distortion在選擇最大視場(chǎng)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。 Ud"_[JtGM  
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請(qǐng)問：我怎么用優(yōu)化算子優(yōu)化呢！ T6SYXQd>.  
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DIST、 DIMX、 DISC、 DISG我都用了，還是不行，望大家給予指導(dǎo)！謝謝！ ka=A:biz  

仔細(xì)查閱zemax的定義的畸變和網(wǎng)格畸變

畸變沒有問題

Grid Distortion視場(chǎng)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(chǎng)角>=90度的情形。 =%77~q-HL  
樓主是否正好是這種情形? rWL&-AZQl  
uw>y*OLU+  
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. svCm}`  
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Grid distortion can not be calculated if the field units are angles and the maximum angle equals or exceeds 90 degrees. This limitation is due to the assumption that the predicted image height is proportional to the tangent of the field angle in object space. When the field angle exceeds 90 degrees, the tangent does not predict the linear image height correctly. }PMlG  

謝謝各位的幫助， 我再好好理解理解

已經(jīng)很不錯(cuò)了啊

了解先

f-theta鏡頭如何優(yōu)化