[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 &D "$N"  
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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 2f8fA'|O  
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图片:2.jpg

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然后运行分析的结果如下： #/NZ0IbHk  
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Analysis of Tolerances qEC-'sl<  
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File : E:\光学设计资料\zemax练习\f500.ZMX C0o0 l>  
Title: uXiAN#1  
Date : TUE JUN 21 2011 Y/1KvF4)k  
#<V/lPz+  
Units are Millimeters. -/:N&6eRb  
All changes are computed using linear differences. cXx?MF5  
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Paraxial Focus compensation only. D[2I_3[wp  
YGP.LR7  
WARNING: Solves should be removed prior to tolerancing. $;1#gq%  
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Mnemonics: /; ;_l2t  
TFRN: Tolerance on curvature in fringes. ?{W@TY@S  
TTHI: Tolerance on thickness. @^8tk3$Y  
TSDX: Tolerance on surface decentering in x. lwEJ)Bv  
TSDY: Tolerance on surface decentering in y. eMk?#&a)  
TSTX: Tolerance on surface tilt in x (degrees). 0xbx2jlkY  
TSTY: Tolerance on surface tilt in y (degrees). Fp>iwdjFg  
TIRR: Tolerance on irregularity (fringes). `mTpL^f  
TIND: Tolerance on Nd index of refraction. `y5?lS*  
TEDX: Tolerance on element decentering in x. z1t YD  
TEDY: Tolerance on element decentering in y. tMxa:h;/x  
TETX: Tolerance on element tilt in x (degrees). 4,CQJ  
TETY: Tolerance on element tilt in y (degrees). "'us.t.  
%N#8D<ULd  
WARNING: RAY AIMING IS OFF. Very loose tolerances may not be computed accurately. J0BA@jH5  
m6J7)Wp  
WARNING: Boundary constraints on compensators will be ignored. 6/`$Y!.ub  
6/^$SWd2  
Criterion           : Geometric MTF average S&T at 30.0000 cycles per mm zr~hGhfq  
Mode                : Sensitivities %~`8F\Hiu  
Sampling            : 2 Mg?^5`*  
Nominal Criterion   : 0.54403234 \M~M  
Test Wavelength     : 0.6328 H!Gsu$C  
4.|-?qG  
QeP8Vl&e:  
Fields: XY Symmetric Angle in degrees RIBj9kd  
#      X-Field      Y-Field       Weight    VDX    VDY    VCX    VCY DIR_W-z  
1   0.000E+000   0.000E+000   1.000E+000  0.000  0.000  0.000  0.000 \IJ\  
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Sensitivity Analysis: 8&g|iG  
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                 |----------------- Minimum ----------------| |----------------- Maximum ----------------| h|h-<G?>  
Type                      Value      Criterion        Change          Value      Criterion        Change LaL.C^K  
Fringe tolerance on surface 1 va \5  
TFRN   1            -1.00000000     0.54257256    -0.00145977     1.00000000     0.54548607     0.00145374 l:v:f@M&
 
Change in Focus                :      -0.000000                            0.000000 PjriAlxD  
Fringe tolerance on surface 2 H^cB?i  
TFRN   2            -1.00000000     0.54177471    -0.00225762     1.00000000     0.54627463     0.00224230 OQ&?^S`8',  
Change in Focus                :       0.000000                            0.000000 @!z9.o;  
Fringe tolerance on surface 3 r|t;#  
TFRN   3            -1.00000000     0.54779866     0.00376632     1.00000000     0.54022572    -0.00380662 aa:Oh^AJy  
Change in Focus                :      -0.000000                            0.000000 ^R.kThG  
Thickness tolerance on surface 1 #g,JNJ}  
TTHI   1   3        -0.20000000     0.54321462    -0.00081772     0.20000000     0.54484759     0.00081525 F(*~[*Ff  
Change in Focus                :       0.000000                            0.000000 >%jQw.  
Thickness tolerance on surface 2 dn0?#=  
TTHI   2   3        -0.20000000     0.54478712     0.00075478     0.20000000     0.54327558    -0.00075675 `9QvokD  
Change in Focus                :       0.000000                           -0.000000 S-{3'D[Nj  
Decenter X tolerance on surfaces 1 through 3 dIiQ^M  
TEDX   1   3        -0.20000000     0.54401464   -1.7700E-005     0.20000000     0.54401464   -1.7700E-005 `p`)D6  
Change in Focus                :       0.000000                            0.000000 ssVO+ T  
Decenter Y tolerance on surfaces 1 through 3 u^H:z0  
TEDY   1   3        -0.20000000     0.54401464   -1.7700E-005     0.20000000     0.54401464   -1.7700E-005 l]Ozy@ Ib  
Change in Focus                :       0.000000                            0.000000 ?n o.hf  
Tilt X tolerance on surfaces 1 through 3 (degrees) :#8#tLv  
TETX   1   3        -0.20000000     0.54897548     0.00494314     0.20000000     0.54897548     0.00494314 @i`*i@g  
Change in Focus                :       0.000000                            0.000000 B
WdR~|2  
Tilt Y tolerance on surfaces 1 through 3 (degrees) !~5;Jb>s[/  
TETY   1   3        -0.20000000     0.54897548     0.00494314     0.20000000     0.54897548     0.00494314 L'k)  
Change in Focus                :       0.000000                            0.000000 (=:9pbP  
Decenter X tolerance on surface 1 =Q985)Y&  
TSDX   1            -0.20000000     0.53999563    -0.00403671     0.20000000     0.53999563    -0.00403671 4%wP}Zj#  
Change in Focus                :       0.000000                            0.000000 ~nk{\ rWO  
Decenter Y tolerance on surface 1 bQG2tDvu[  
TSDY   1            -0.20000000     0.53999563    -0.00403671     0.20000000     0.53999563    -0.00403671 t,#9i#q#  
Change in Focus                :       0.000000                            0.000000 ]k~k6#),;  
Tilt X tolerance on surface (degrees) 1 KKm&~^c  
TSTX   1            -0.20000000     0.42678383    -0.11724851     0.20000000     0.42678383    -0.11724851 GKf,1kns  
Change in Focus                :       0.000000                            0.000000 r )8[LN-  
Tilt Y tolerance on surface (degrees) 1 uJ jm50R<  
TSTY   1            -0.20000000     0.42678383    -0.11724851     0.20000000     0.42678383    -0.11724851 nb}*IExd  
Change in Focus                :       0.000000                            0.000000 7\*_/[
B  
Decenter X tolerance on surface 2 iB#xUSkS  
TSDX   2            -0.20000000     0.51705427    -0.02697807     0.20000000     0.51705427    -0.02697807 nO^aZmSu  
Change in Focus                :       0.000000                            0.000000 g.-{=kZ   
Decenter Y tolerance on surface 2 K3jKOV8  
TSDY   2            -0.20000000     0.51705427    -0.02697807     0.20000000     0.51705427    -0.02697807 a4HUP*  
Change in Focus                :       0.000000                            0.000000 Oga/  
Tilt X tolerance on surface (degrees) 2 aw9/bp*N  
TSTX   2            -0.20000000     0.35349910    -0.19053324     0.20000000     0.35349910    -0.19053324 l}-JtZ?[?  
Change in Focus                :       0.000000                            0.000000 Vae}:8'}  
Tilt Y tolerance on surface (degrees) 2 8[  
TSTY   2            -0.20000000     0.35349910    -0.19053324     0.20000000     0.35349910    -0.19053324 n}?XFx!%  
Change in Focus                :       0.000000                            0.000000  QDCu  
Decenter X tolerance on surface 3 -r
%4
,4  
TSDX   3            -0.20000000     0.53419039    -0.00984195     0.20000000     0.53419039    -0.00984195 JWhi*je  
Change in Focus                :       0.000000                            0.000000 $j61IL3+  
Decenter Y tolerance on surface 3 d?dZ=]~C  
TSDY   3            -0.20000000     0.53419039    -0.00984195     0.20000000     0.53419039    -0.00984195 L{y%\:]  
Change in Focus                :       0.000000                            0.000000 [DS.@97n  
Tilt X tolerance on surface (degrees) 3 w"Gci~]bXU  
TSTX   3            -0.20000000     0.42861670    -0.11541563     0.20000000     0.42861670    -0.11541563 <GoUt
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Change in Focus                :       0.000000                            0.000000 L{H` t{A  
Tilt Y tolerance on surface (degrees) 3 xa+=9=<AQ  
TSTY   3            -0.20000000     0.42861670    -0.11541563     0.20000000     0.42861670    -0.11541563 1}1.5[4d  
Change in Focus                :       0.000000                            0.000000 ?@"F\Bv<h  
Irregularity of surface 1 in fringes P]]re,&R  
TIRR   1            -0.20000000     0.50973587    -0.03429647     0.20000000     0.57333868     0.02930634 !d Ns3d  
Change in Focus                :       0.000000                            0.000000 E.
V#Bk=  
Irregularity of surface 2 in fringes 'p3JYRT$  
TIRR   2            -0.20000000     0.53400904    -0.01002330     0.20000000     0.55360281     0.00957047 9 cU]@j}2  
Change in Focus                :       0.000000                            0.000000 vmW >$P  
Irregularity of surface 3 in fringes o^P/ -&T  
TIRR   3            -0.20000000     0.58078982     0.03675748     0.20000000     0.49904394    -0.04498840 0mcZe5RS  
Change in Focus                :       0.000000                            0.000000 @=CN#D12  
Index tolerance on surface 1 +&?#Gdb  
TIND   1            -0.00100000     0.52606778    -0.01796456     0.00100000     0.56121811     0.01718578 *o<zo `  
Change in Focus                :       0.000000                            0.000000 y;zp*(}f$h  
Index tolerance on surface 2 zu8   
TIND   2            -0.00100000     0.55639086     0.01235852     0.00100000     0.53126361    -0.01276872 cMxuG'{=.  
Change in Focus                :       0.000000                           -0.000000 ;Fw{p{7<  
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Worst offenders: \\P
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Type                      Value      Criterion        Change {%g]Ym=  
TSTY   2            -0.20000000     0.35349910    -0.19053324 QWL$F:9:  
TSTY   2             0.20000000     0.35349910    -0.19053324 ;S Re`  
TSTX   2            -0.20000000     0.35349910    -0.19053324 gaFOm9y.e  
TSTX   2             0.20000000     0.35349910    -0.19053324 \09m ?;^  
TSTY   1            -0.20000000     0.42678383    -0.11724851 Nl~'W  
TSTY   1             0.20000000     0.42678383    -0.11724851 | Q0Wv8/  
TSTX   1            -0.20000000     0.42678383    -0.11724851 Ph@hk0dgr/  
TSTX   1             0.20000000     0.42678383    -0.11724851 {4B{~Qe;  
TSTY   3            -0.20000000     0.42861670    -0.11541563 F@ Sw
  
TSTY   3             0.20000000     0.42861670    -0.11541563 NDsF<2A4  
 bT(}=j  
Estimated Performance Changes based upon Root-Sum-Square method: sfb)iH|sW  
Nominal MTF                 :     0.54403234 Zb> UY8  
Estimated change            :    -0.36299231 SUv(MA&  
Estimated MTF               :     0.18104003 ]w7wwU^^*U  
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Compensator Statistics: ]7
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Change in back focus: TVy\%FP^L  
Minimum            :        -0.000000 jVA|Vi_2  
Maximum            :         0.000000 < cNJrer  
Mean               :        -0.000000 | ]#PF*  
Standard Deviation :         0.000000 4KSZ;fV6/  
h=<x%sie  
Monte Carlo Analysis: v#/k`x
\  
Number of trials: 20 rQE:rVKVh  
bU$4"_eA B  
Initial Statistics: Normal Distribution SSCyq#dl$  
d v8q&_  
  Trial       Criterion        Change 2c)Ez?  
      1     0.42804416    -0.11598818 &E&_Z6#  
Change in Focus                :      -0.400171 _]oNbcbt(  
      2     0.54384387    -0.00018847 _x+)Tv  
Change in Focus                :       1.018470 B!
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      3     0.44510003    -0.09893230 X ? eCK,  
Change in Focus                :      -0.601922 iX]tL:,~i  
      4     0.18154684    -0.36248550 $,I%g<  
Change in Focus                :       0.920681 x-E@[=  
      5     0.28665820    -0.25737414 SM?r
ss.=  
Change in Focus                :       1.253875 mz-sazgV  
      6     0.21263372    -0.33139862 l~mC$>f  
Change in Focus                :      -0.903878 86 $88`/2  
      7     0.40051424    -0.14351809 5t
=7-  
Change in Focus                :      -1.354815 KE$I!$zO  
      8     0.48754161    -0.05649072 zE,1zBS<  
Change in Focus                :       0.215922 TzSEQS{  
      9     0.40357468    -0.14045766 &9j*Y  
Change in Focus                :       0.281783 TUy 25E  
     10     0.26315315    -0.28087919 W!Qaa(o?  
Change in Focus                :      -1.048393 pB(|Y]3A  
     11     0.26120585    -0.28282649 J 2H$ALl  
Change in Focus                :       1.017611 8'<RPU}M  
     12     0.24033815    -0.30369419 7)-uYi] dA  
Change in Focus                :      -0.109292 4:zyZu3fm  
     13     0.37164046    -0.17239188 !-tP\%'  
Change in Focus                :      -0.692430 Zb&5)&'
X  
     14     0.48597489    -0.05805744 /#Fz K  
Change in Focus                :      -0.662040 UlNx5l+k  
     15     0.21462327    -0.32940907 d?6\  
Change in Focus                :       1.611296 h/s8".\  
     16     0.43378226    -0.11025008 8wH1x .  
Change in Focus                :      -0.640081 c3aBPig\D  
     17     0.39321881    -0.15081353 Pt=@U:  
Change in Focus                :       0.914906 ;{j@ia  
     18     0.20692530    -0.33710703 5K#<VU*:  
Change in Focus                :       0.801607 X$A[~v  
     19     0.51374068    -0.03029165 NG+%H1!$_  
Change in Focus                :       0.947293 D~Rv"Hh  
     20     0.38013374    -0.16389860 FlyRcj  
Change in Focus                :       0.667010 M&SY2\\TB  
<^n@q f}  
Number of traceable Monte Carlo files generated: 20 r?%,#1|$$  
Nu,t,&B   
Nominal     0.54403234 x'iBEm  
Best        0.54384387    Trial     2 cgV5{|P  
Worst       0.18154684    Trial     4 U-.A+#<IT9  
Mean        0.35770970 Q$^)z_jai  
Std Dev     0.11156454 4p6\8eytq.  
P;bOtT --  
yc7"tptfF  
Compensator Statistics: 4(mRLr%l@`  
Change in back focus: -Pp =)_O  
Minimum            :        -1.354815 SdXAL  
Maximum            :         1.611296 9i`MUE1Sh  
Mean               :         0.161872 c~)H" n  
Standard Deviation :         0.869664 M<K}H8?  
70F(`;  
90% >       0.20977951               Iy;bzHXs  
80% >       0.22748071               dTVh{~/  
50% >       0.38667627               GhC%32F  
20% >       0.46553746               4<btWbk5u*  
10% >       0.50064115                rCsH 0:l8P  
j"Z9}F@  
End of Run. L"It0C  
fq(3uE]nC  
这就有了些疑问，为什么我选择的补偿器是近轴焦点，而分析结果近轴焦点都不变化？？应该是变得。另外最后的蒙特卡洛分析，只有10%的大于0.5（我用的是MTF作为评价方式），可是我设计的MTF如图 AVO$R\1YR  

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 ;\54(x}|K  
S{S.H?{F  
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                 )(DX]Tr`  
80% >       0.22748071                 FQO>%=&4  
50% >       0.38667627                 QvDD   
20% >       0.46553746                 X0BBJ(e  
10% >       0.50064115 *:,y`!F=y  
i3<ZFR  
最后这个数值是MTF值呢，还是MTF的公差？ o]WG8Mo-  
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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？？？   jB0ED0)wX  
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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  : t*cVDA&K  
90% >       0.20977951                 HA::(cXL  
80% >       0.22748071                 #vBS7
ba  
50% >       0.38667627                 Kvf
Zj  
20% >       0.46553746                 ,?ci+M)  
10% >       0.50064115 7(1UXtT  
....... " H;iAv  

`Wy8g?d;bn  
HE>sZ;  
这些数值都是MTF值

Criterion           : Geometric MTF average S&T at 30.0000 cycles per mm   k| Ye[GM*  
Mode                : Sensitivities GO=3<Q{;  
Sampling            : 2 {'R\C5:D7  
Nominal Criterion   : 0.54403234 @
[(<oX%  
Test Wavelength     : 0.6328
i%a jL  
[!CIBK99  
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？ 98^o9i  
KsMC+:`F  
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