[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 Lwv9oa|  
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基本條件是 {I2jLc  
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主鏡必須是拋物面 )0d3sJ8  
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副鏡必須是球面 BwBv'p+n  
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系統包含一組校正鏡 9Xm"kVqd/  
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口徑200mm以上 l_}c[bAUu  
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焦比不限制 /D~ ,X48+  
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視角0.5度以上 iWtWT1n8n  
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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. ZGp8$Y>r  
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Surf     Type         Radius      Thickness                Glass      Diameter          Conic m
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OBJ STANDARD       Infinity       Infinity                                  0              0 (cCB3n\20  
   1 STANDARD       Infinity            480                                220              0 TAGqRYgi  
STO STANDARD          -1500           -450               MIRROR           204             -1 ?SQT;C3j(  
   3 STANDARD      -1313.861       279.4093               MIRROR      88.07552              0 @7BH`b$)!  
   4 STANDARD       167.5149              6                N-BK7            56              0 a!>AhOk.  
   5 STANDARD       123.4956       4.762038                                 56              0 HWs?,AJNxB  
   6 STANDARD      -262.7873              4                N-BK7            56              0 I.( 9{  
   7 STANDARD      -173.5643       263.0681                                 56              0 }S42.f.p  
   8 STANDARD       Infinity              0                           24.26983              0 Ajq<=y`NzV  
IMA STANDARD       Infinity                                          24.26983              0

經過不斷的努力,做了一些改進. a N_M  
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Surf     Type         Radius      Thickness                Glass      Diameter          Conic S{&;  
 OBJ STANDARD       Infinity       Infinity                                  0              0 X$J  
   1 STANDARD       Infinity            600                                170              0 y/ vE  
   2 STANDARD          -2000           -580               MIRROR           420             -1 .p <!2  
 STO STANDARD      -1884.757       397.7682               MIRROR      168.9907              0 .hn"NXy  
   4 STANDARD       559.8055              4                N-BK7           100              0 ~kF^0-JZY  
   5 STANDARD       237.0107       6.225114                                100              0 j].XVn,  
   6 STANDARD      -1486.626              6                N-BK7           100              0 j
oYj`K  
   7 STANDARD      -319.3041       350.9258                                100              0 = q;ACW,z  
   8 STANDARD       Infinity     0.04561954                           44.12979              0 _?mu2!X  
 IMA STANDARD       Infinity                                          44.12228              0 v-g2k_o|  

波像差真小啊！