[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 `t&;Yk]-L  
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然后添加了默认公差分析，基本没变 Yur)_m  
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然后运行分析的结果如下： GNc|)$  
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Analysis of Tolerances YWrY{6M  
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File : E:\光学设计资料\zemax练习\f500.ZMX A>A'dQ69  
Title: CJ  
Date : TUE JUN 21 2011 QL18MbfqP  
>:&p(eu)L0  
Units are Millimeters. `r(J6,O  
All changes are computed using linear differences. |9]K:A  
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Paraxial Focus compensation only. z 5+]Z a~  
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WARNING: Solves should be removed prior to tolerancing. RLNuH2y
;  
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Mnemonics: Fjt,  
TFRN: Tolerance on curvature in fringes. z %E!tB2o  
TTHI: Tolerance on thickness. PM!t"[@&  
TSDX: Tolerance on surface decentering in x. }#5roNH~Z  
TSDY: Tolerance on surface decentering in y. 9mphj)`d;#  
TSTX: Tolerance on surface tilt in x (degrees). AiK
4t-  
TSTY: Tolerance on surface tilt in y (degrees). h\\2r>  
TIRR: Tolerance on irregularity (fringes). os^SD&hL  
TIND: Tolerance on Nd index of refraction. +N:6wZ7<f  
TEDX: Tolerance on element decentering in x. .BDRD~kB  
TEDY: Tolerance on element decentering in y. <|Eby!KXR  
TETX: Tolerance on element tilt in x (degrees). wg0.i?R-]  
TETY: Tolerance on element tilt in y (degrees). !&p:=}s  
n4T2'e  
WARNING: RAY AIMING IS OFF. Very loose tolerances may not be computed accurately. @i-@mxk6<  
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WARNING: Boundary constraints on compensators will be ignored. oHd0 <TO  
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Criterion           : Geometric MTF average S&T at 30.0000 cycles per mm )Q/`o,Vm  
Mode                : Sensitivities aw%v
u  
Sampling            : 2 *1S.9L  
Nominal Criterion   : 0.54403234 42wC."A  
Test Wavelength     : 0.6328 Tc5OI'-V  
1"B9Z6jf  
PG[O?l  
Fields: XY Symmetric Angle in degrees Y_>-p(IH  
#      X-Field      Y-Field       Weight    VDX    VDY    VCX    VCY ^^3va)1{!  
1   0.000E+000   0.000E+000   1.000E+000  0.000  0.000  0.000  0.000 )wzs~Fn/  
|SukiXJZF  
Sensitivity Analysis: 4m[C-NB!g  
'# IuY  
                 |----------------- Minimum ----------------| |----------------- Maximum ----------------| C"Q=(3  
Type                      Value      Criterion        Change          Value      Criterion        Change V3~a!k  
Fringe tolerance on surface 1 Y1aF._Z  
TFRN   1            -1.00000000     0.54257256    -0.00145977     1.00000000     0.54548607     0.00145374 5@t uo`k  
Change in Focus                :      -0.000000                            0.000000 JKi@Kw  
Fringe tolerance on surface 2 :F w"u4WI  
TFRN   2            -1.00000000     0.54177471    -0.00225762     1.00000000     0.54627463     0.00224230 ) a\DS yr  
Change in Focus                :       0.000000                            0.000000 ) wo2GF  
Fringe tolerance on surface 3 !^bB/e  
TFRN   3            -1.00000000     0.54779866     0.00376632     1.00000000     0.54022572    -0.00380662 ]op^dW1;0_  
Change in Focus                :      -0.000000                            0.000000 wt=>{JM  
Thickness tolerance on surface 1 imCl{vt(kj  
TTHI   1   3        -0.20000000     0.54321462    -0.00081772     0.20000000     0.54484759     0.00081525 v\9,j  
Change in Focus                :       0.000000                            0.000000 Q1I_=fT  
Thickness tolerance on surface 2 |
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TTHI   2   3        -0.20000000     0.54478712     0.00075478     0.20000000     0.54327558    -0.00075675 X)iWb(@k"7  
Change in Focus                :       0.000000                           -0.000000 .6 ?>t!&W  
Decenter X tolerance on surfaces 1 through 3 a.&#dxgW[  
TEDX   1   3        -0.20000000     0.54401464   -1.7700E-005     0.20000000     0.54401464   -1.7700E-005 VfA5r`^  
Change in Focus                :       0.000000                            0.000000 9H, &n
ET  
Decenter Y tolerance on surfaces 1 through 3 +V+*7s%fL  
TEDY   1   3        -0.20000000     0.54401464   -1.7700E-005     0.20000000     0.54401464   -1.7700E-005 -=t3O#  
Change in Focus                :       0.000000                            0.000000 :UDn^(#  
Tilt X tolerance on surfaces 1 through 3 (degrees) &;h~JS=  
TETX   1   3        -0.20000000     0.54897548     0.00494314     0.20000000     0.54897548     0.00494314 EfBVu  
Change in Focus                :       0.000000                            0.000000 Y^ZBA\D2,k  
Tilt Y tolerance on surfaces 1 through 3 (degrees) &kjwIg{  
TETY   1   3        -0.20000000     0.54897548     0.00494314     0.20000000     0.54897548     0.00494314 n:^"[Le  
Change in Focus                :       0.000000                            0.000000 Fx[A8G  
Decenter X tolerance on surface 1 <X I35\^  
TSDX   1            -0.20000000     0.53999563    -0.00403671     0.20000000     0.53999563    -0.00403671 #C,f/PXfaB  
Change in Focus                :       0.000000                            0.000000 "X{aS}  
Decenter Y tolerance on surface 1 q4
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TSDY   1            -0.20000000     0.53999563    -0.00403671     0.20000000     0.53999563    -0.00403671 m~j\?mb{+  
Change in Focus                :       0.000000                            0.000000 FH`'1iVH  
Tilt X tolerance on surface (degrees) 1 Q(;B)  
TSTX   1            -0.20000000     0.42678383    -0.11724851     0.20000000     0.42678383    -0.11724851 Neo^C_[vN  
Change in Focus                :       0.000000                            0.000000 r0g/:lJi  
Tilt Y tolerance on surface (degrees) 1 bDFCZH-:'O  
TSTY   1            -0.20000000     0.42678383    -0.11724851     0.20000000     0.42678383    -0.11724851 4j/iG\  
Change in Focus                :       0.000000                            0.000000 d7_g u  
Decenter X tolerance on surface 2 aa0`y  
TSDX   2            -0.20000000     0.51705427    -0.02697807     0.20000000     0.51705427    -0.02697807 _+Jf.n20  
Change in Focus                :       0.000000                            0.000000 .KU
SNrs'  
Decenter Y tolerance on surface 2 6mF{ImbRbS  
TSDY   2            -0.20000000     0.51705427    -0.02697807     0.20000000     0.51705427    -0.02697807 [*
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Change in Focus                :       0.000000                            0.000000 8pq-nuf|K  
Tilt X tolerance on surface (degrees) 2 ]Ic?:lKN  
TSTX   2            -0.20000000     0.35349910    -0.19053324     0.20000000     0.35349910    -0.19053324 +F7<5YW&(  
Change in Focus                :       0.000000                            0.000000 x'@32gv  
Tilt Y tolerance on surface (degrees) 2 inPdV9  
TSTY   2            -0.20000000     0.35349910    -0.19053324     0.20000000     0.35349910    -0.19053324 ~[uV  
Change in Focus                :       0.000000                            0.000000 4g6ksdFQ  
Decenter X tolerance on surface 3 ,na=~.0R:  
TSDX   3            -0.20000000     0.53419039    -0.00984195     0.20000000     0.53419039    -0.00984195 x'M^4{4[  
Change in Focus                :       0.000000                            0.000000 C'8!cPFVv  
Decenter Y tolerance on surface 3 .W@(nQ-<  
TSDY   3            -0.20000000     0.53419039    -0.00984195     0.20000000     0.53419039    -0.00984195 i (%tHa37  
Change in Focus                :       0.000000                            0.000000 F[7Kw"~J  
Tilt X tolerance on surface (degrees) 3 Yt/SnF  
TSTX   3            -0.20000000     0.42861670    -0.11541563     0.20000000     0.42861670    -0.11541563 Q9yGQu  
Change in Focus                :       0.000000                            0.000000 o/dMm:TF  
Tilt Y tolerance on surface (degrees) 3 W3jXZ>  
TSTY   3            -0.20000000     0.42861670    -0.11541563     0.20000000     0.42861670    -0.11541563 oxMUW<gYd  
Change in Focus                :       0.000000                            0.000000 !O F?xW  
Irregularity of surface 1 in fringes U50s!Zt45  
TIRR   1            -0.20000000     0.50973587    -0.03429647     0.20000000     0.57333868     0.02930634 +w k]iH  
Change in Focus                :       0.000000                            0.000000 ib(>vp$V  
Irregularity of surface 2 in fringes @QVqpE<|  
TIRR   2            -0.20000000     0.53400904    -0.01002330     0.20000000     0.55360281     0.00957047 {HIR>])o  
Change in Focus                :       0.000000                            0.000000 uO ?Od  
Irregularity of surface 3 in fringes a)_rka1(  
TIRR   3            -0.20000000     0.58078982     0.03675748     0.20000000     0.49904394    -0.04498840 $c@w$2  
Change in Focus                :       0.000000                            0.000000 && DD  
Index tolerance on surface 1 "+n4c'  
TIND   1            -0.00100000     0.52606778    -0.01796456     0.00100000     0.56121811     0.01718578 Zp7yaz3y  
Change in Focus                :       0.000000                            0.000000 XdGpW  
Index tolerance on surface 2 XDpfpJ,z"}  
TIND   2            -0.00100000     0.55639086     0.01235852     0.00100000     0.53126361    -0.01276872 e$Xq  
Change in Focus                :       0.000000                           -0.000000 E7X!cm/2<  
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Worst offenders: @%EE0)IA  
Type                      Value      Criterion        Change k'[ S@+5  
TSTY   2            -0.20000000     0.35349910    -0.19053324 .1.J5>/n  
TSTY   2             0.20000000     0.35349910    -0.19053324 jFuC=6aF  
TSTX   2            -0.20000000     0.35349910    -0.19053324 x7P([^i  
TSTX   2             0.20000000     0.35349910    -0.19053324 o~v_PD[S  
TSTY   1            -0.20000000     0.42678383    -0.11724851 k]SAJ~bS|  
TSTY   1             0.20000000     0.42678383    -0.11724851 & Fg|%,fv]  
TSTX   1            -0.20000000     0.42678383    -0.11724851 b&lN%+%}  
TSTX   1             0.20000000     0.42678383    -0.11724851 F>~ xzc  
TSTY   3            -0.20000000     0.42861670    -0.11541563 *M> iZO*@  
TSTY   3             0.20000000     0.42861670    -0.11541563 $^W-Wmsz  
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Estimated Performance Changes based upon Root-Sum-Square method: ?
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Nominal MTF                 :     0.54403234 !;o\5x<'$O  
Estimated change            :    -0.36299231 M11"<3]D  
Estimated MTF               :     0.18104003 r-RCe3%g%  
*2JH_Cj`  
Compensator Statistics: ds*m6#1b  
Change in back focus: ,c4c@|Bh?  
Minimum            :        -0.000000 *:=];1O  
Maximum            :         0.000000 I86e&"40  
Mean               :        -0.000000 uP{;*E3?  
Standard Deviation :         0.000000 LXHwX*`Y  
*0%4l_i  
Monte Carlo Analysis: p+, 1Fi  
Number of trials: 20 IK*oFo{C=K  
\*f;!{P{  
Initial Statistics: Normal Distribution aB6Ye/Io  
#/OUGeJ  
  Trial       Criterion        Change z 0~j  
      1     0.42804416    -0.11598818 ,f}h}  
Change in Focus                :      -0.400171 =2^Vgc  
      2     0.54384387    -0.00018847 FE/$(7rM  
Change in Focus                :       1.018470 >f&xJq  
      3     0.44510003    -0.09893230 \'n$&PFe  
Change in Focus                :      -0.601922 oi7 3YOB  
      4     0.18154684    -0.36248550 9*#$0Y=  
Change in Focus                :       0.920681 B|cA[  
      5     0.28665820    -0.25737414 : @'fpN  
Change in Focus                :       1.253875 ,LhEshf  
      6     0.21263372    -0.33139862 CN$I:o04C  
Change in Focus                :      -0.903878 ?n!lUr$:y  
      7     0.40051424    -0.14351809 @Z?7E8(  
Change in Focus                :      -1.354815 WK pUn8&N  
      8     0.48754161    -0.05649072 |q3f]T&+>{  
Change in Focus                :       0.215922 `vudS?  
      9     0.40357468    -0.14045766 +0VG[c\8  
Change in Focus                :       0.281783 t,RyeS/  
     10     0.26315315    -0.28087919 Tdg6kkJ  
Change in Focus                :      -1.048393 @u,+F0Yd  
     11     0.26120585    -0.28282649 I0!j<G  
Change in Focus                :       1.017611 M]c7D`%s  
     12     0.24033815    -0.30369419 Z.!g9fi8>  
Change in Focus                :      -0.109292 `)"tO&Fn  
     13     0.37164046    -0.17239188 5v"Y\k+1  
Change in Focus                :      -0.692430 j5kA^MTG  
     14     0.48597489    -0.05805744 A:/}`  
Change in Focus                :      -0.662040 Q~phGD3!~  
     15     0.21462327    -0.32940907 &]w#z=5SXi  
Change in Focus                :       1.611296 1Yud~[c  
     16     0.43378226    -0.11025008 &GuF\wJ{7  
Change in Focus                :      -0.640081 S#k{e72 *  
     17     0.39321881    -0.15081353 !~WZ_z  
Change in Focus                :       0.914906 [q'eENG  
     18     0.20692530    -0.33710703 (#oYyM]  
Change in Focus                :       0.801607 #zxd;;p3  
     19     0.51374068    -0.03029165 dsV ~|D6:  
Change in Focus                :       0.947293 'GkvUrD9D$  
     20     0.38013374    -0.16389860 f3!n$lj  
Change in Focus                :       0.667010 TM0b-W (H  
`4LJ;KC(  
Number of traceable Monte Carlo files generated: 20 
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3!aEClRtq  
Nominal     0.54403234 +$PFHXB  
Best        0.54384387    Trial     2 z=qWJQ  
Worst       0.18154684    Trial     4 %VWp&a8  
Mean        0.35770970 x@Y|v@}BE  
Std Dev     0.11156454 /u=aX  
mH)OB?+lq  
[<yz)<<  
Compensator Statistics: G;NB\3~X  
Change in back focus: 2 l(Dee Y  
Minimum            :        -1.354815 p'}lN|"{O  
Maximum            :         1.611296 k52QaMKa~A  
Mean               :         0.161872 (k
8Z=/N~  
Standard Deviation :         0.869664 N+NK`  
IP04l;p/  
90% >       0.20977951               hfg O  
80% >       0.22748071               N`HSE=u>  
50% >       0.38667627               y:.?5KsPI  
20% >       0.46553746               gKWzFnW  
10% >       0.50064115                6}ftBmv  
x9%-plP  
End of Run. #&V5H{  
t@)my[!  
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 .a,(pq Jg  
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=UNT.]  
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 T%kKVr  
KzG_ <<  
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                 hk} t:<  
80% >       0.22748071                 &XQZs`41+  
50% >       0.38667627                 Q]#Z9H  
20% >       0.46553746                 l.oBcg[  
10% >       0.50064115 L\L"mc|O  
tOH0IE c  
最后这个数值是MTF值呢，还是MTF的公差？ Pm^lr!3p  
0`n 5x0R  
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？？？   nY0sb8lZJ  
E>}q2  
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  : (F8AL6  
90% >       0.20977951                 c_1/W{  
80% >       0.22748071                 ]US[5)EL-  
50% >       0.38667627                 3k'.(P|F  
20% >       0.46553746                 Y8ehmz|g]J  
10% >       0.50064115 Z;b
+>2oL  
....... )#`H."Z  

9#rt:&xo0  
\!H{Ks{#R.  
这些数值都是MTF值

Criterion           : Geometric MTF average S&T at 30.0000 cycles per mm   yP\Up  
Mode                : Sensitivities 2k1aX~?  
Sampling            : 2 .nZ3kT`  
Nominal Criterion   : 0.54403234 vWY(%Q,  
Test Wavelength     : 0.6328 z $6JpG  
Z+idLbIs  
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？ q)iTn)Z!  
kRot7-7I|  
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