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打算設(shè)計(jì)一個(gè)復(fù)雜的變焦鏡頭，于是我參考Don的書(shū)《Lens Design Automatic and quasi-autonomous computational methods andtechniques》取其中第四十二章：A zoom lens from scratch 打開(kāi)例子文件（我一般喜歡用online tutorial的代碼或者書(shū)中代碼修改，進(jìn)行修改為： SA:Zc^aV  y-Fo=y
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7o\@>rNWP 然后開(kāi)始運(yùn)行SYNOPSYS開(kāi)始查找初始結(jié)構(gòu)，發(fā)現(xiàn)速度并不快。優(yōu)化了半小時(shí)后，覺(jué)得有問(wèn)題，但是又找不出毛病，于是發(fā)郵件給Don請(qǐng)求幫助。 x exaQuK 半小時(shí)后得到回復(fù)（晚上十點(diǎn)發(fā)的，正好美國(guó)的上班時(shí)間），原文如下： A]*}HZ , The user is making a big mistake.He is asking for 14 elements, and that means 2**14 cases, or 16384 in all. Each additional element doubles the running time. />C^WQI^ Irecommend asking for groups of two instead of three elements to start with,which makes only 1024 cases. Then, when you optimize the best one, useAEI to see where you need more elements. This will run 16x faster. A typical run on ZSEARCH takes 20 minutes,and then the AEI runs improve the lens in a deterministic way. The whole job can usually be done in about two hours. ]IaMp788 That'sthe smart way to use the code.（經(jīng)典） K&u _R
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