[讨论]一個雙反系統的改進 [复制链接]

這是我最近在想的一個設計 ,.Xqb~  
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基本條件是 !58j xh  
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主鏡必須是拋物面 P,1[NW  
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副鏡必須是球面 L<8:1
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系統包含一組校正鏡 s'/b&Idf8  
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口徑200mm以上 H#yBWvj*H  
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焦比不限制 G .PzpBA  
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視角0.5度以上 yffg_^fR  
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以下是我的結果,目前覺得副鏡的口徑太大,不知道有無改進的可能. g~,"C8-H  
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Surf     Type         Radius      Thickness                Glass      Diameter          Conic 3eOwy~  
OBJ STANDARD       Infinity       Infinity                                  0              0 NFDh!HUm  
   1 STANDARD       Infinity            480                                220              0 ;fg8,(SM^  
STO STANDARD          -1500           -450               MIRROR           204             -1 jV:Krk6T<  
   3 STANDARD      -1313.861       279.4093               MIRROR      88.07552              0 + Xc s<+b  
   4 STANDARD       167.5149              6                N-BK7            56              0 ShFC@)<lJ  
   5 STANDARD       123.4956       4.762038                                 56              0
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   6 STANDARD      -262.7873              4                N-BK7            56              0 O+ ].'  
   7 STANDARD      -173.5643       263.0681                                 56              0 PWU8 9YXp  
   8 STANDARD       Infinity              0                           24.26983              0 qyA%_;ReMY  
IMA STANDARD       Infinity                                          24.26983              0

經過不斷的努力,做了一些改進. :TPT]q d@  
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Surf     Type         Radius      Thickness                Glass      Diameter          Conic -^R6U~  
 OBJ STANDARD       Infinity       Infinity                                  0              0 o7_*#5rD
 
   1 STANDARD       Infinity            600                                170              0 E:_m6 m  
   2 STANDARD          -2000           -580               MIRROR           420             -1 xZMQ+OW2i  
 STO STANDARD      -1884.757       397.7682               MIRROR      168.9907              0 .el&\Jt  
   4 STANDARD       559.8055              4                N-BK7           100              0 xOKLc!J  
   5 STANDARD       237.0107       6.225114                                100              0 5c8tH=  
   6 STANDARD      -1486.626              6                N-BK7           100              0 -VC kk  
   7 STANDARD      -319.3041       350.9258                                100              0 jV}tjwq  
   8 STANDARD       Infinity     0.04561954                           44.12979              0 t\GoUeH]  
 IMA STANDARD       Infinity                                          44.12228              0 RWX?B  

波像差真小啊！