[讨论]公差分析结果的疑问 [复制链接]

我现在在初学zemax的公差分析，找了一个双胶合透镜 KQ2]VN"?_  
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图片:1.JPG

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然后添加了默认公差分析，基本没变 T{ojla(  
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图片:2.jpg

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然后运行分析的结果如下： l~\'Z2op  
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Analysis of Tolerances 38f9jF%7j  
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File : E:\光学设计资料\zemax练习\f500.ZMX gsZCWT
 
Title: 'g$|:bw/  
Date : TUE JUN 21 2011 KBOxr5w  
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Units are Millimeters. x0 j$]$  
All changes are computed using linear differences. V%3K")  
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Paraxial Focus compensation only. |}#Rn`*2y  
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WARNING: Solves should be removed prior to tolerancing. WSh+5](:  
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Mnemonics: > ^D10Nf*  
TFRN: Tolerance on curvature in fringes.
4|
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TTHI: Tolerance on thickness. \.}* s]6  
TSDX: Tolerance on surface decentering in x. :r!nz\%WW  
TSDY: Tolerance on surface decentering in y. m'a3}vRV(  
TSTX: Tolerance on surface tilt in x (degrees). <oO^w&G  
TSTY: Tolerance on surface tilt in y (degrees). fRq2sK;+  
TIRR: Tolerance on irregularity (fringes). SB]|y-su  
TIND: Tolerance on Nd index of refraction. t\'URpa+5%  
TEDX: Tolerance on element decentering in x. 5z=;q!3  
TEDY: Tolerance on element decentering in y. !K3 #4   
TETX: Tolerance on element tilt in x (degrees). Q
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TETY: Tolerance on element tilt in y (degrees). #N7@p}P  
O.!|;)HQ  
WARNING: RAY AIMING IS OFF. Very loose tolerances may not be computed accurately. a2sN$k  
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WARNING: Boundary constraints on compensators will be ignored. 3d \bB !  
<w8*Ly:L  
Criterion           : Geometric MTF average S&T at 30.0000 cycles per mm %e=BC^VW  
Mode                : Sensitivities &i6WVNGy  
Sampling            : 2 Xul<,U~w6  
Nominal Criterion   : 0.54403234 !m:SRNPg  
Test Wavelength     : 0.6328 bW[Y:}Hk~  
<Ms,0YKx  
mpN|U(n  
Fields: XY Symmetric Angle in degrees ]iYjS  
#      X-Field      Y-Field       Weight    VDX    VDY    VCX    VCY "Bn!<h}mg  
1   0.000E+000   0.000E+000   1.000E+000  0.000  0.000  0.000  0.000 P!
1y@R>Ln  
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Sensitivity Analysis: Nx,.4CI  
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                 |----------------- Minimum ----------------| |----------------- Maximum ----------------| c]#F^(-A`  
Type                      Value      Criterion        Change          Value      Criterion        Change \M<C6m5  
Fringe tolerance on surface 1 e=Kf<ZQt  
TFRN   1            -1.00000000     0.54257256    -0.00145977     1.00000000     0.54548607     0.00145374 ?%#3p[  
Change in Focus                :      -0.000000                            0.000000 ^
vfp;  
Fringe tolerance on surface 2 0c /xE<h  
TFRN   2            -1.00000000     0.54177471    -0.00225762     1.00000000     0.54627463     0.00224230 P^T]Ubv"  
Change in Focus                :       0.000000                            0.000000 6|~N5E~SX  
Fringe tolerance on surface 3 w%KU@$  
TFRN   3            -1.00000000     0.54779866     0.00376632     1.00000000     0.54022572    -0.00380662 8<{)|GoqB  
Change in Focus                :      -0.000000                            0.000000 p^<*v8,~7  
Thickness tolerance on surface 1 "NMX>a,(  
TTHI   1   3        -0.20000000     0.54321462    -0.00081772     0.20000000     0.54484759     0.00081525 QS\H[?M$  
Change in Focus                :       0.000000                            0.000000 {f<2VeJ  
Thickness tolerance on surface 2 <$qe2FtUq  
TTHI   2   3        -0.20000000     0.54478712     0.00075478     0.20000000     0.54327558    -0.00075675 'MVE5  
Change in Focus                :       0.000000                           -0.000000 H0LEK(K  
Decenter X tolerance on surfaces 1 through 3 ,l1A]Wx  
TEDX   1   3        -0.20000000     0.54401464   -1.7700E-005     0.20000000     0.54401464   -1.7700E-005 }f?$QSF  
Change in Focus                :       0.000000                            0.000000 zU}Ru&T9  
Decenter Y tolerance on surfaces 1 through 3 |@!4BA  
TEDY   1   3        -0.20000000     0.54401464   -1.7700E-005     0.20000000     0.54401464   -1.7700E-005 Lzm9K
h;  
Change in Focus                :       0.000000                            0.000000 F^fL  
Tilt X tolerance on surfaces 1 through 3 (degrees) $oD
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TETX   1   3        -0.20000000     0.54897548     0.00494314     0.20000000     0.54897548     0.00494314 Hyh$-iCa  
Change in Focus                :       0.000000                            0.000000 XOe)tz L  
Tilt Y tolerance on surfaces 1 through 3 (degrees) Nb(c;|nV  
TETY   1   3        -0.20000000     0.54897548     0.00494314     0.20000000     0.54897548     0.00494314 o'+p,_y9Y@  
Change in Focus                :       0.000000                            0.000000 RoS&oGYqR  
Decenter X tolerance on surface 1 Na=.LW-ma=  
TSDX   1            -0.20000000     0.53999563    -0.00403671     0.20000000     0.53999563    -0.00403671 $3psSQQo  
Change in Focus                :       0.000000                            0.000000 $pr\"!|z  
Decenter Y tolerance on surface 1 .!/w[Z]  
TSDY   1            -0.20000000     0.53999563    -0.00403671     0.20000000     0.53999563    -0.00403671 !Z]#1"A8  
Change in Focus                :       0.000000                            0.000000 bvzNur_  
Tilt X tolerance on surface (degrees) 1 Kg4\:A7Sa.  
TSTX   1            -0.20000000     0.42678383    -0.11724851     0.20000000     0.42678383    -0.11724851 d< j+a1&  
Change in Focus                :       0.000000                            0.000000 "MM)AY*b  
Tilt Y tolerance on surface (degrees) 1 g3B%}!|  
TSTY   1            -0.20000000     0.42678383    -0.11724851     0.20000000     0.42678383    -0.11724851 RrA9@95+  
Change in Focus                :       0.000000                            0.000000 w#0/&\b=  
Decenter X tolerance on surface 2 |Y"nZK,  
TSDX   2            -0.20000000     0.51705427    -0.02697807     0.20000000     0.51705427    -0.02697807 L6<.>\^Z"  
Change in Focus                :       0.000000                            0.000000 1u>[0<U~E  
Decenter Y tolerance on surface 2 wGy`0c]v?  
TSDY   2            -0.20000000     0.51705427    -0.02697807     0.20000000     0.51705427    -0.02697807 r9sq3z|%  
Change in Focus                :       0.000000                            0.000000 wo>7^ZA  
Tilt X tolerance on surface (degrees) 2 f"9aL= 3  
TSTX   2            -0.20000000     0.35349910    -0.19053324     0.20000000     0.35349910    -0.19053324 lZ gX{  
Change in Focus                :       0.000000                            0.000000 )seeB
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Tilt Y tolerance on surface (degrees) 2 [/
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TSTY   2            -0.20000000     0.35349910    -0.19053324     0.20000000     0.35349910    -0.19053324 >L4q>S^v  
Change in Focus                :       0.000000                            0.000000 ]WFr5  
Decenter X tolerance on surface 3 1zIX $A  
TSDX   3            -0.20000000     0.53419039    -0.00984195     0.20000000     0.53419039    -0.00984195 IE]? WW5  
Change in Focus                :       0.000000                            0.000000 KJ (|skO  
Decenter Y tolerance on surface 3 W2>VgMR [  
TSDY   3            -0.20000000     0.53419039    -0.00984195     0.20000000     0.53419039    -0.00984195 _"l2UDx  
Change in Focus                :       0.000000                            0.000000 l;7T.2J'Z  
Tilt X tolerance on surface (degrees) 3 Y[sBVz'j5  
TSTX   3            -0.20000000     0.42861670    -0.11541563     0.20000000     0.42861670    -0.11541563 vd
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Change in Focus                :       0.000000                            0.000000
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Tilt Y tolerance on surface (degrees) 3 10}<n_I  
TSTY   3            -0.20000000     0.42861670    -0.11541563     0.20000000     0.42861670    -0.11541563 Dm{9;Abs%  
Change in Focus                :       0.000000                            0.000000 yjE$o?A  
Irregularity of surface 1 in fringes Y' FB {  
TIRR   1            -0.20000000     0.50973587    -0.03429647     0.20000000     0.57333868     0.02930634 /qaWUUf  
Change in Focus                :       0.000000                            0.000000 W79Sz}):  
Irregularity of surface 2 in fringes MxLg8,M  
TIRR   2            -0.20000000     0.53400904    -0.01002330     0.20000000     0.55360281     0.00957047 >bRoQ8  
Change in Focus                :       0.000000                            0.000000 5FMe&  
Irregularity of surface 3 in fringes CXiDe)|<E  
TIRR   3            -0.20000000     0.58078982     0.03675748     0.20000000     0.49904394    -0.04498840 [b:0j-  
Change in Focus                :       0.000000                            0.000000 k^@dDLr"  
Index tolerance on surface 1 E[NszM[P  
TIND   1            -0.00100000     0.52606778    -0.01796456     0.00100000     0.56121811     0.01718578 mswAao<y&x  
Change in Focus                :       0.000000                            0.000000 >BWe"{;  
Index tolerance on surface 2 0<FT=tKm  
TIND   2            -0.00100000     0.55639086     0.01235852     0.00100000     0.53126361    -0.01276872 tqD=)0Uzs  
Change in Focus                :       0.000000                           -0.000000 3D}Pa  
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Worst offenders: B=}s7
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Type                      Value      Criterion        Change 6c6w w"  
TSTY   2            -0.20000000     0.35349910    -0.19053324 9y}/ G  
TSTY   2             0.20000000     0.35349910    -0.19053324 XOL_vS24  
TSTX   2            -0.20000000     0.35349910    -0.19053324 B4/\=MXb  
TSTX   2             0.20000000     0.35349910    -0.19053324 \RS0mb  
TSTY   1            -0.20000000     0.42678383    -0.11724851 7I/a  
TSTY   1             0.20000000     0.42678383    -0.11724851 hsAk7KC  
TSTX   1            -0.20000000     0.42678383    -0.11724851 :JXGgl<y  
TSTX   1             0.20000000     0.42678383    -0.11724851 l@:&0id4I  
TSTY   3            -0.20000000     0.42861670    -0.11541563 laRn![[  
TSTY   3             0.20000000     0.42861670    -0.11541563 V}h <,E9  
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Estimated Performance Changes based upon Root-Sum-Square method: X=@bzL;eq  
Nominal MTF                 :     0.54403234 @$fvhEkrT@  
Estimated change            :    -0.36299231 uCx6/n6'  
Estimated MTF               :     0.18104003 ^U9b)KA  
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Compensator Statistics: Q_6v3no1  
Change in back focus: %RX!Pi}5+g  
Minimum            :        -0.000000 OUhlQq\  
Maximum            :         0.000000 6 \?GY  
Mean               :        -0.000000 eRm*+l|?  
Standard Deviation :         0.000000 =F% <W7  
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Monte Carlo Analysis: g;~$xXn  
Number of trials: 20 2WS Wfh  
Mtaky=l8~I  
Initial Statistics: Normal Distribution ,(B/R8ZF~  
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  Trial       Criterion        Change =5O&4G`}  
      1     0.42804416    -0.11598818 kl|m @Nxp
 
Change in Focus                :      -0.400171 d@?zCFD  
      2     0.54384387    -0.00018847 vt#&YXu{A  
Change in Focus                :       1.018470 JMfv|>=  
      3     0.44510003    -0.09893230  _'K6S  
Change in Focus                :      -0.601922 6?';ip  
      4     0.18154684    -0.36248550 4D[(X=FSU  
Change in Focus                :       0.920681 .[ s6x5M  
      5     0.28665820    -0.25737414 %_(^BZd  
Change in Focus                :       1.253875 q}]z8 L  
      6     0.21263372    -0.33139862 JSoInR1E  
Change in Focus                :      -0.903878 )`#SMLMy~  
      7     0.40051424    -0.14351809 VVe^s|~Z  
Change in Focus                :      -1.354815 g*WY kv  
      8     0.48754161    -0.05649072 ]u\-_PP  
Change in Focus                :       0.215922 ;y
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      9     0.40357468    -0.14045766 h^f?rWD:nz  
Change in Focus                :       0.281783 Ow{NI-^K  
     10     0.26315315    -0.28087919 #[]B
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Change in Focus                :      -1.048393 {>d\  
     11     0.26120585    -0.28282649 #iT3aou  
Change in Focus                :       1.017611 Cy5M0{  
     12     0.24033815    -0.30369419 `^)oVs  
Change in Focus                :      -0.109292 8aY}b($*ZI  
     13     0.37164046    -0.17239188 M1eM^m8U  
Change in Focus                :      -0.692430 gMPvzBpP  
     14     0.48597489    -0.05805744 ynn>d  
Change in Focus                :      -0.662040 +;a\ gF^  
     15     0.21462327    -0.32940907 lT8^BT  
Change in Focus                :       1.611296 ^@$T>SB1  
     16     0.43378226    -0.11025008 hdpA& OteR  
Change in Focus                :      -0.640081 /~+j[oB  
     17     0.39321881    -0.15081353 fS4 Ru  
Change in Focus                :       0.914906 X CHN'
l'  
     18     0.20692530    -0.33710703
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Change in Focus                :       0.801607 #Wt1Ph_;  
     19     0.51374068    -0.03029165 )gG_K$08?  
Change in Focus                :       0.947293 ={I(i6  
     20     0.38013374    -0.16389860 v
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Change in Focus                :       0.667010 ~V/?/J$  
rs@qC>_C0  
Number of traceable Monte Carlo files generated: 20 {;={abj  
,ysn7Y{Y  
Nominal     0.54403234 gFxaUrZA  
Best        0.54384387    Trial     2 Cp]q>lM"  
Worst       0.18154684    Trial     4 T*#<p;  
Mean        0.35770970 ~g&Gi)je  
Std Dev     0.11156454 -V52?Hq
  
\; zix(N[5  
Gu%}B@4^  
Compensator Statistics: AE4>pzBe  
Change in back focus: Zv
8G[(  
Minimum            :        -1.354815 $kh6-y@  
Maximum            :         1.611296 GTW
5f  
Mean               :         0.161872 Bz6Zy)&sAL  
Standard Deviation :         0.869664 H?j}!JzAC  
AAK}t6  
90% >       0.20977951               t8B==%  
80% >       0.22748071               <a=k"'0  
50% >       0.38667627               l_ycB%2e^  
20% >       0.46553746               M!iYj+nrP  
10% >       0.50064115                h|.*V$3  
lLZ?&z$  
End of Run. Q46sPMH+_  
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这就有了些疑问，为什么我选择的补偿器是近轴焦点，而分析结果近轴焦点都不变化？？应该是变得。另外最后的蒙特卡洛分析，只有10%的大于0.5（我用的是MTF作为评价方式），可是我设计的MTF如图 **Q K}j[D  

图片:3.JPG

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是大于0.6左右的，难道我按照这个默认的公差来加工的话，只有10%的才可能大于0.5？那太低了啊，请问这该怎么进行进一步处理。或者之前哪有问题 XLFo
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/ Hexv#3  
不吝赐教

我又试了试，原来是得根据上面的结果不断修改公差，放松或者变紧，然后在做公差分析，不断提高蒙特卡罗的结果。但是比如就拿我这个来说，理想是达到30lp处>0.6，那么实际做蒙特卡罗公差分析时，百分之多少以上的MTF是合格的呢？

90% >       0.20977951                 _J`q\N K  
80% >       0.22748071                 C~a-R#  
50% >       0.38667627                 3ws}E6\D  
20% >       0.46553746                 '74-rL:i  
10% >       0.50064115 Qd$!?h  
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最后这个数值是MTF值呢，还是MTF的公差？ f.&Y_G3a<  
Rw\S-z/  
也就是说，这到底是有90%的产品MTF大于0.20977951还是90%的产品的MTF变化量大于0.20977951？？？   CGkCLd*s]  
~#jD/  
怎么没人啊，大家讨论讨论吗

没有人啊？？？

引用第2楼sansummer于2011-06-22 08:56发表的  : D 5qCn^R  
90% >       0.20977951                 s wdW70  
80% >       0.22748071                 '[fo  
50% >       0.38667627                 aD~3C/?aW  
20% >       0.46553746                 c8sY#I  
10% >       0.50064115 9'I I!  
....... _-*Lj;^V  

$e;_N4d^  
I-NzGx2u  
这些数值都是MTF值

Criterion           : Geometric MTF average S&T at 30.0000 cycles per mm   CUT D]:\  
Mode                : Sensitivities 8YAUy\  
Sampling            : 2 \+E{8&TH'  
Nominal Criterion   : 0.54403234 ~jb6  
Test Wavelength     : 0.6328 E0^~i:Mk  
(xJ6: u  
波长632.8nm 时 mtf 是 0.54403234  没达到0.6

谢谢。您说的“波长632.8nm 时 mtf 是 0.54403234  没达到0.6”这是一个评价标准吧？ "w0>  
k7Fa+Y)K7  
这个评价标准和我理想的设计结果的0.6有什么联系吗，另外这个 0.54403234  是这么来的？

你试试把原来的系统波长改成632.8nm，看看Geometric MTF    30 per mm 的mtf值是不是0.54403234

啊...这倒也是。换了波长的确可能有所变化。另外还有就是如果现在百分比太低，我是否应该考虑把最敏感的公差再紧一些，就会好了？

恩，多多尝试