[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 Pfm_@'8  
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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 M/q E2L[y  
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图片:2.jpg

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然后运行分析的结果如下： n @?4b8"  
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Analysis of Tolerances k6Uc3O  
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File : E:\光学设计资料\zemax练习\f500.ZMX cZ(elZ0~  
Title: {@<J_A  
Date : TUE JUN 21 2011 u$D*tqxG  
N gLU$/y;  
Units are Millimeters. Iw<jT|y)  
All changes are computed using linear differences. iSFuT7;%  
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Paraxial Focus compensation only. M.nvB)  

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WARNING: Solves should be removed prior to tolerancing. Gcb|W&  
HLBkR>e  
Mnemonics: 2_ :n  
TFRN: Tolerance on curvature in fringes. eeHP&1= 7  
TTHI: Tolerance on thickness. R-Z~V  
TSDX: Tolerance on surface decentering in x. [! 'op0  
TSDY: Tolerance on surface decentering in y. UG'bOF4  
TSTX: Tolerance on surface tilt in x (degrees). qim 'dp:  
TSTY: Tolerance on surface tilt in y (degrees). =1P6
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TIRR: Tolerance on irregularity (fringes). dB+N\HBY  
TIND: Tolerance on Nd index of refraction. >7roe []-|  
TEDX: Tolerance on element decentering in x. Ug:\  
TEDY: Tolerance on element decentering in y. dgDy5{_  
TETX: Tolerance on element tilt in x (degrees). (YY~{W$w(  
TETY: Tolerance on element tilt in y (degrees). 0W3i()  
i 9g>9  
WARNING: RAY AIMING IS OFF. Very loose tolerances may not be computed accurately. R
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8scc%t7  
WARNING: Boundary constraints on compensators will be ignored. 'kYwz;gp  
`+t.!tv!  
Criterion           : Geometric MTF average S&T at 30.0000 cycles per mm Yk42(!  
Mode                : Sensitivities U`o^mtW.  
Sampling            : 2 (;%|-{7e-  
Nominal Criterion   : 0.54403234 :K ~  
Test Wavelength     : 0.6328 PlYm&  
-!0_:m3  
0<PR+Iv*i  
Fields: XY Symmetric Angle in degrees >|6iR%"f#  
#      X-Field      Y-Field       Weight    VDX    VDY    VCX    VCY f30Pi1/h=c  
1   0.000E+000   0.000E+000   1.000E+000  0.000  0.000  0.000  0.000 BC,.^"fA6  
+dBz`WD  
Sensitivity Analysis: Z4){ 7|~a  
DI`%zLDcY  
                 |----------------- Minimum ----------------| |----------------- Maximum ----------------| =?h~.lo  
Type                      Value      Criterion        Change          Value      Criterion        Change QZX~T|Ckv  
Fringe tolerance on surface 1 tTN?r8  
TFRN   1            -1.00000000     0.54257256    -0.00145977     1.00000000     0.54548607     0.00145374 GabYfUkO  
Change in Focus                :      -0.000000                            0.000000 PyA&ZkX>  
Fringe tolerance on surface 2 8?*RIA.a  
TFRN   2            -1.00000000     0.54177471    -0.00225762     1.00000000     0.54627463     0.00224230 k8,?hX:  
Change in Focus                :       0.000000                            0.000000 l88A=iLgv  
Fringe tolerance on surface 3 _/S?#   
TFRN   3            -1.00000000     0.54779866     0.00376632     1.00000000     0.54022572    -0.00380662 #wc \T  
Change in Focus                :      -0.000000                            0.000000 9S[
XTU  
Thickness tolerance on surface 1 eZr&x~] -w  
TTHI   1   3        -0.20000000     0.54321462    -0.00081772     0.20000000     0.54484759     0.00081525 4
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Change in Focus                :       0.000000                            0.000000 }tPk@$  
Thickness tolerance on surface 2 AF43$6KZP$  
TTHI   2   3        -0.20000000     0.54478712     0.00075478     0.20000000     0.54327558    -0.00075675 ^E6d`2w-  
Change in Focus                :       0.000000                           -0.000000 .)|a2d ~F  
Decenter X tolerance on surfaces 1 through 3 N~g:Wf!  
TEDX   1   3        -0.20000000     0.54401464   -1.7700E-005     0.20000000     0.54401464   -1.7700E-005 |3+m%
;X  
Change in Focus                :       0.000000                            0.000000 YF:2>w<  
Decenter Y tolerance on surfaces 1 through 3 [+w3J#K  
TEDY   1   3        -0.20000000     0.54401464   -1.7700E-005     0.20000000     0.54401464   -1.7700E-005 8F)G7 H,  
Change in Focus                :       0.000000                            0.000000 tRw@U4=y  
Tilt X tolerance on surfaces 1 through 3 (degrees) `.#@@5e  
TETX   1   3        -0.20000000     0.54897548     0.00494314     0.20000000     0.54897548     0.00494314 qzFQEepso  
Change in Focus                :       0.000000                            0.000000 Omi^>c4G  
Tilt Y tolerance on surfaces 1 through 3 (degrees) aS|wpm)K>8  
TETY   1   3        -0.20000000     0.54897548     0.00494314     0.20000000     0.54897548     0.00494314 7ZUiY  
Change in Focus                :       0.000000                            0.000000 m,')&{Rd  
Decenter X tolerance on surface 1 CzV(cSS9-  
TSDX   1            -0.20000000     0.53999563    -0.00403671     0.20000000     0.53999563    -0.00403671 [!^-J}^g~\  
Change in Focus                :       0.000000                            0.000000 >)_ojDO  
Decenter Y tolerance on surface 1 0)Rw|(Fpo]  
TSDY   1            -0.20000000     0.53999563    -0.00403671     0.20000000     0.53999563    -0.00403671 l7JY]?p  
Change in Focus                :       0.000000                            0.000000 s7r9,8$  
Tilt X tolerance on surface (degrees) 1 xt4)Ya  
TSTX   1            -0.20000000     0.42678383    -0.11724851     0.20000000     0.42678383    -0.11724851 $jd<v1"o  
Change in Focus                :       0.000000                            0.000000 XT,#g-oi  
Tilt Y tolerance on surface (degrees) 1 fqs]<qi  
TSTY   1            -0.20000000     0.42678383    -0.11724851     0.20000000     0.42678383    -0.11724851 wFlvi=n/  
Change in Focus                :       0.000000                            0.000000 @c'|Iqy`  
Decenter X tolerance on surface 2 ?zq+jLyo  
TSDX   2            -0.20000000     0.51705427    -0.02697807     0.20000000     0.51705427    -0.02697807 ,}
xbAA#  
Change in Focus                :       0.000000                            0.000000 zH=!*[d8  
Decenter Y tolerance on surface 2 Fv?=Z-wk  
TSDY   2            -0.20000000     0.51705427    -0.02697807     0.20000000     0.51705427    -0.02697807 (#q<\`  
Change in Focus                :       0.000000                            0.000000 /,5Z-Z*wq  
Tilt X tolerance on surface (degrees) 2 NHw x:-RH  
TSTX   2            -0.20000000     0.35349910    -0.19053324     0.20000000     0.35349910    -0.19053324 +*&cz  
Change in Focus                :       0.000000                            0.000000 i.iio-  
Tilt Y tolerance on surface (degrees) 2 .BO<  
TSTY   2            -0.20000000     0.35349910    -0.19053324     0.20000000     0.35349910    -0.19053324 +VEU:1Gt  
Change in Focus                :       0.000000                            0.000000 ">dq0gD  
Decenter X tolerance on surface 3 ,J mbqOV?!  
TSDX   3            -0.20000000     0.53419039    -0.00984195     0.20000000     0.53419039    -0.00984195 #$\fh;!W  
Change in Focus                :       0.000000                            0.000000 r^HAaGpC  
Decenter Y tolerance on surface 3 o@lWBfB*%e  
TSDY   3            -0.20000000     0.53419039    -0.00984195     0.20000000     0.53419039    -0.00984195 /T0nLp`gi  
Change in Focus                :       0.000000                            0.000000 ;]CVb`d  
Tilt X tolerance on surface (degrees) 3 >+cVs:  
TSTX   3            -0.20000000     0.42861670    -0.11541563     0.20000000     0.42861670    -0.11541563 %'L;FPxB  
Change in Focus                :       0.000000                            0.000000 'ul\Q`N3  
Tilt Y tolerance on surface (degrees) 3 l{P\No  
TSTY   3            -0.20000000     0.42861670    -0.11541563     0.20000000     0.42861670    -0.11541563 DE{h
5-g  
Change in Focus                :       0.000000                            0.000000 0MIUI<;j  
Irregularity of surface 1 in fringes lS{r=y_0.  
TIRR   1            -0.20000000     0.50973587    -0.03429647     0.20000000     0.57333868     0.02930634 YpdNX.P,  
Change in Focus                :       0.000000                            0.000000 ,7|;k2  
Irregularity of surface 2 in fringes `PI(%N  
TIRR   2            -0.20000000     0.53400904    -0.01002330     0.20000000     0.55360281     0.00957047 P\~{3U  
Change in Focus                :       0.000000                            0.000000 W(
*V2<$o  
Irregularity of surface 3 in fringes F.q|x|9j  
TIRR   3            -0.20000000     0.58078982     0.03675748     0.20000000     0.49904394    -0.04498840 =l
r)gj  
Change in Focus                :       0.000000                            0.000000 \tJFAc  
Index tolerance on surface 1 6R}j-1 <n  
TIND   1            -0.00100000     0.52606778    -0.01796456     0.00100000     0.56121811     0.01718578 yno('1B@  
Change in Focus                :       0.000000                            0.000000 <o:@dS  
Index tolerance on surface 2 v.Ogf5  
TIND   2            -0.00100000     0.55639086     0.01235852     0.00100000     0.53126361    -0.01276872 W^g[L:s  
Change in Focus                :       0.000000                           -0.000000 4cCF\&yU  
^9"KTZc-*  
Worst offenders: ),@f6](  
Type                      Value      Criterion        Change US?Rr  
TSTY   2            -0.20000000     0.35349910    -0.19053324 H*e'Cs/  
TSTY   2             0.20000000     0.35349910    -0.19053324 "c`xH@D  
TSTX   2            -0.20000000     0.35349910    -0.19053324 +1{fzb>9_  
TSTX   2             0.20000000     0.35349910    -0.19053324 (!K+P[g  
TSTY   1            -0.20000000     0.42678383    -0.11724851 Edt}",s7  
TSTY   1             0.20000000     0.42678383    -0.11724851 j033%p+Xc  
TSTX   1            -0.20000000     0.42678383    -0.11724851 )JgC$ <  
TSTX   1             0.20000000     0.42678383    -0.11724851  yOHXY&  
TSTY   3            -0.20000000     0.42861670    -0.11541563 oJ;rc{n-  
TSTY   3             0.20000000     0.42861670    -0.11541563 1]4^V7y  
;q#]-^  
Estimated Performance Changes based upon Root-Sum-Square method: T|'&K:[TJ  
Nominal MTF                 :     0.54403234 gb-{2p>}  
Estimated change            :    -0.36299231 gp< =Gmd  
Estimated MTF               :     0.18104003 *:_~Nn9_R;  
 7 Yv!N  
Compensator Statistics: ):6-  
Change in back focus: ?F$6;N6x  
Minimum            :        -0.000000 H/cTJ9zz  
Maximum            :         0.000000 8:g!w:$x  
Mean               :        -0.000000 V7<eQ0;m  
Standard Deviation :         0.000000 oh}^?p  
r4knN 2:  
Monte Carlo Analysis: *{/@uO  
Number of trials: 20 ,ECAan/@  
f~\Xg7<  
Initial Statistics: Normal Distribution e6P[c=m #  
INNAYQ  
  Trial       Criterion        Change &IQ%\W#aY  
      1     0.42804416    -0.11598818 IcoowZZ   
Change in Focus                :      -0.400171 Q-('5a19J  
      2     0.54384387    -0.00018847 79ZxqvB\  
Change in Focus                :       1.018470 h`?k.{})M  
      3     0.44510003    -0.09893230 T_ ^C#>  
Change in Focus                :      -0.601922 uW[3G  
      4     0.18154684    -0.36248550 ,{<Fz%  
Change in Focus                :       0.920681 Di.;<v#FL  
      5     0.28665820    -0.25737414 qZ\L  
Change in Focus                :       1.253875 yq*JdTF  
      6     0.21263372    -0.33139862 5#uO'<2$  
Change in Focus                :      -0.903878 T\3[F%?  
      7     0.40051424    -0.14351809 k=uZ=tUft*  
Change in Focus                :      -1.354815 ZgF/;8!~V-  
      8     0.48754161    -0.05649072 BlaJl[Piv  
Change in Focus                :       0.215922 k^*$^;z  
      9     0.40357468    -0.14045766 YBylyVZ  
Change in Focus                :       0.281783 {%7<"  
     10     0.26315315    -0.28087919 l{EU_|q  
Change in Focus                :      -1.048393 VD;j[~/Z  
     11     0.26120585    -0.28282649 ~gt3Om
h  
Change in Focus                :       1.017611 nLd~2qBuv  
     12     0.24033815    -0.30369419 qY}Cg0[@g  
Change in Focus                :      -0.109292 5c;En6W  
     13     0.37164046    -0.17239188 JD&U}dJ  
Change in Focus                :      -0.692430 5; f\0<-  
     14     0.48597489    -0.05805744 Yw^ Gti'<  
Change in Focus                :      -0.662040 0M\NS$u(Y  
     15     0.21462327    -0.32940907 qy9i9$8  
Change in Focus                :       1.611296 -A;w$j6*  
     16     0.43378226    -0.11025008 gb_X?j%p7  
Change in Focus                :      -0.640081 JN^bo(kb  
     17     0.39321881    -0.15081353 cHEz{'1m  
Change in Focus                :       0.914906 Z3`2-r_=  
     18     0.20692530    -0.33710703 \3j)>u,r  
Change in Focus                :       0.801607 #~e9h9  
     19     0.51374068    -0.03029165 \^s2W:c  
Change in Focus                :       0.947293 0x#E4v(UA  
     20     0.38013374    -0.16389860 'z](xG<  
Change in Focus                :       0.667010 1PIzV:L\  
7vNtv9  
Number of traceable Monte Carlo files generated: 20 J0qXtr%h\  
85C#ja1&  
Nominal     0.54403234 %yhI;M^  
Best        0.54384387    Trial     2 u\w2S4c  
Worst       0.18154684    Trial     4 Lupy:4
AD  
Mean        0.35770970 ||fvKyKW>  
Std Dev     0.11156454 tQf
!|]#J  
V0T<eH<  
j!CU  
Compensator Statistics: Z"N(=B  
Change in back focus: C
2.W[T  
Minimum            :        -1.354815 2:~cJk{  
Maximum            :         1.611296 oVEAlBm^v  
Mean               :         0.161872 -$m@*L  
Standard Deviation :         0.869664 %09*l%,;  
tx)OJ

Y  
90% >       0.20977951               ,5kvn  
80% >       0.22748071               PC0HH  
50% >       0.38667627               N*':U^/t4J  
20% >       0.46553746               Un\Ubqi0  
10% >       0.50064115                D{W SKn  
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End of Run. T NIst  
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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 uDI}R]8~  

图片:3.JPG

#AvEH=:  
'tut4SwC  
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 gE1|lY$NL  
&|NZ8:*+#  
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                 nrI"k2oA@  
80% >       0.22748071                 Y'2-yB  
50% >       0.38667627                  !,Qm  
20% >       0.46553746                 KUlB2Fqi  
10% >       0.50064115 =obt"K%n  
5d>nIKW  
最后这个数值是MTF值呢，还是MTF的公差？ ;,mBT[_ZO  
H]VsOr  
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？？？   8?A@/  
i[o&z$JO  
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  : ^G]KE8  
90% >       0.20977951                 DR.3 J`?K  
80% >       0.22748071                 g_3rEvf"4  
50% >       0.38667627                 )_Z]=5Ds  
20% >       0.46553746                 BZ]&uD|f  
10% >       0.50064115 !Ei Ze.K  
....... m]+X}|  

`XQx$I  
Vvxc8v:  
这些数值都是MTF值

Criterion           : Geometric MTF average S&T at 30.0000 cycles per mm   7v4-hfN  
Mode                : Sensitivities oT9XJwqnv  
Sampling            : 2 ^*$WZMMJ1  
Nominal Criterion   : 0.54403234 1Ud t9$~T  
Test Wavelength     : 0.6328 jk WBw.(  
~|$) 1  
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？ 9I^H)~S  
(<5'ceF)X  
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