[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 B<0Kl.V  
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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 _n_()at)  
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图片:2.jpg

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然后运行分析的结果如下： Qqs1%u;e8  
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Analysis of Tolerances gtePo[ZH.P  
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File : E:\光学设计资料\zemax练习\f500.ZMX
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Title: _ j`tR:  
Date : TUE JUN 21 2011 dqs~K7O^E  
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Units are Millimeters. lqKj;'  
All changes are computed using linear differences. ~]q>}/&YLo  
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Paraxial Focus compensation only. ambr}+}  
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WARNING: Solves should be removed prior to tolerancing. w ?*eBLJ(G  
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Mnemonics: P-3f51Q  
TFRN: Tolerance on curvature in fringes. Rc &m4|cw7  
TTHI: Tolerance on thickness. Ih>s2
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TSDX: Tolerance on surface decentering in x. Wky9wr:g  
TSDY: Tolerance on surface decentering in y. ,[)l>!0\H  
TSTX: Tolerance on surface tilt in x (degrees). uxB`  
TSTY: Tolerance on surface tilt in y (degrees). P=_fYA3  
TIRR: Tolerance on irregularity (fringes). i;-M8Q^  
TIND: Tolerance on Nd index of refraction. ;j7G$s9  
TEDX: Tolerance on element decentering in x. :mW< E  
TEDY: Tolerance on element decentering in y. m(*rMO>_  
TETX: Tolerance on element tilt in x (degrees). U7?v4O]D[  
TETY: Tolerance on element tilt in y (degrees). ^'a#FbMtt  
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WARNING: RAY AIMING IS OFF. Very loose tolerances may not be computed accurately. zRou~Kxi  
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WARNING: Boundary constraints on compensators will be ignored. tW/g0lC%  
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Criterion           : Geometric MTF average S&T at 30.0000 cycles per mm 
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Mode                : Sensitivities y.c6r> }  
Sampling            : 2 D>-r `  
Nominal Criterion   : 0.54403234 N9-7YQ`D  
Test Wavelength     : 0.6328 EK Vcz'w  
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x  
tH44\~  
Fields: XY Symmetric Angle in degrees w"wW0uE^  
#      X-Field      Y-Field       Weight    VDX    VDY    VCX    VCY &9fQW?Czs  
1   0.000E+000   0.000E+000   1.000E+000  0.000  0.000  0.000  0.000 /s} "0/Y\  
X;N?L%Pp  
Sensitivity Analysis: t>/x-{bH\  
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                 |----------------- Minimum ----------------| |----------------- Maximum ----------------| -v.\W y~\  
Type                      Value      Criterion        Change          Value      Criterion        Change -(]CFnD_N  
Fringe tolerance on surface 1 &29jg_'W  
TFRN   1            -1.00000000     0.54257256    -0.00145977     1.00000000     0.54548607     0.00145374 Hd\V?#H  
Change in Focus                :      -0.000000                            0.000000 eqsmv[  
Fringe tolerance on surface 2 bXO
KC  
TFRN   2            -1.00000000     0.54177471    -0.00225762     1.00000000     0.54627463     0.00224230 b%%r`j,'JE  
Change in Focus                :       0.000000                            0.000000 .Zv~a&GE  
Fringe tolerance on surface 3 ?VmgM"'md  
TFRN   3            -1.00000000     0.54779866     0.00376632     1.00000000     0.54022572    -0.00380662 mXOI"B9Sq  
Change in Focus                :      -0.000000                            0.000000 #-<Go
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Thickness tolerance on surface 1 _eOC,J<-~  
TTHI   1   3        -0.20000000     0.54321462    -0.00081772     0.20000000     0.54484759     0.00081525 t4[q:[1  
Change in Focus                :       0.000000                            0.000000 %,_ZVgh0  
Thickness tolerance on surface 2 [Hx(a.,d  
TTHI   2   3        -0.20000000     0.54478712     0.00075478     0.20000000     0.54327558    -0.00075675 BZ1wE1t  
Change in Focus                :       0.000000                           -0.000000 &hI!mo  
Decenter X tolerance on surfaces 1 through 3 2cH RiRT  
TEDX   1   3        -0.20000000     0.54401464   -1.7700E-005     0.20000000     0.54401464   -1.7700E-005 T+ZA"i+   
Change in Focus                :       0.000000                            0.000000 9<.O=-1~  
Decenter Y tolerance on surfaces 1 through 3 e,/]]E/o  
TEDY   1   3        -0.20000000     0.54401464   -1.7700E-005     0.20000000     0.54401464   -1.7700E-005 CqlxE/|  
Change in Focus                :       0.000000                            0.000000 ZBK0`7#&EH  
Tilt X tolerance on surfaces 1 through 3 (degrees) Cl<!S`  
TETX   1   3        -0.20000000     0.54897548     0.00494314     0.20000000     0.54897548     0.00494314 YM:sLeQ~c  
Change in Focus                :       0.000000                            0.000000 $t.oGd@N  
Tilt Y tolerance on surfaces 1 through 3 (degrees) Sb/?<$>  
TETY   1   3        -0.20000000     0.54897548     0.00494314     0.20000000     0.54897548     0.00494314 iX]OF.:   
Change in Focus                :       0.000000                            0.000000 ,3Q~X$f  
Decenter X tolerance on surface 1 95z|}16UK  
TSDX   1            -0.20000000     0.53999563    -0.00403671     0.20000000     0.53999563    -0.00403671 _&hM6N  
Change in Focus                :       0.000000                            0.000000 k`8O/J  
Decenter Y tolerance on surface 1 'E3T fM  
TSDY   1            -0.20000000     0.53999563    -0.00403671     0.20000000     0.53999563    -0.00403671 <VKJ+  
Change in Focus                :       0.000000                            0.000000 ~p?A
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Tilt X tolerance on surface (degrees) 1 X]
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TSTX   1            -0.20000000     0.42678383    -0.11724851     0.20000000     0.42678383    -0.11724851 Fm0d0j  
Change in Focus                :       0.000000                            0.000000 5 ix*wu`,  
Tilt Y tolerance on surface (degrees) 1 PJC(:R(j  
TSTY   1            -0.20000000     0.42678383    -0.11724851     0.20000000     0.42678383    -0.11724851 BZ?3=S1*  
Change in Focus                :       0.000000                            0.000000 4k<o  
Decenter X tolerance on surface 2 Op ar+|p\  
TSDX   2            -0.20000000     0.51705427    -0.02697807     0.20000000     0.51705427    -0.02697807 DOKe.k  
Change in Focus                :       0.000000                            0.000000 0N$7(.  
Decenter Y tolerance on surface 2 k8+J7(_c  
TSDY   2            -0.20000000     0.51705427    -0.02697807     0.20000000     0.51705427    -0.02697807 LBCH7@V1yR  
Change in Focus                :       0.000000                            0.000000 (yqe4  
Tilt X tolerance on surface (degrees) 2 5lG\Z?  
TSTX   2            -0.20000000     0.35349910    -0.19053324     0.20000000     0.35349910    -0.19053324 0]|`*f&p;  
Change in Focus                :       0.000000                            0.000000 YQG<Q  
Tilt Y tolerance on surface (degrees) 2 :@[\(:  
TSTY   2            -0.20000000     0.35349910    -0.19053324     0.20000000     0.35349910    -0.19053324 MF4(  
Change in Focus                :       0.000000                            0.000000 LUMbRrD-  
Decenter X tolerance on surface 3 ?n`m
 
TSDX   3            -0.20000000     0.53419039    -0.00984195     0.20000000     0.53419039    -0.00984195 5;/n`Bd  
Change in Focus                :       0.000000                            0.000000 Xkhd"Axi  
Decenter Y tolerance on surface 3 4@  
TSDY   3            -0.20000000     0.53419039    -0.00984195     0.20000000     0.53419039    -0.00984195 &L+uu',M0c  
Change in Focus                :       0.000000                            0.000000 1RYrUg"s"  
Tilt X tolerance on surface (degrees) 3 8@m$(I+  
TSTX   3            -0.20000000     0.42861670    -0.11541563     0.20000000     0.42861670    -0.11541563 5 3%>)gk:  
Change in Focus                :       0.000000                            0.000000 Q%JI-&K  
Tilt Y tolerance on surface (degrees) 3 }8ubGMr,Y  
TSTY   3            -0.20000000     0.42861670    -0.11541563     0.20000000     0.42861670    -0.11541563 \9VF)Y.ke  
Change in Focus                :       0.000000                            0.000000 6WY/[TC-  
Irregularity of surface 1 in fringes f$xXR$mjf  
TIRR   1            -0.20000000     0.50973587    -0.03429647     0.20000000     0.57333868     0.02930634 wsWFD xR  
Change in Focus                :       0.000000                            0.000000 qgrJi +WZ  
Irregularity of surface 2 in fringes p"ytt|H  
TIRR   2            -0.20000000     0.53400904    -0.01002330     0.20000000     0.55360281     0.00957047 A9MM^jV8  
Change in Focus                :       0.000000                            0.000000 ^z{szy?Fg  
Irregularity of surface 3 in fringes t>\sP   
TIRR   3            -0.20000000     0.58078982     0.03675748     0.20000000     0.49904394    -0.04498840 ukSv70Ev  
Change in Focus                :       0.000000                            0.000000 5g7@Dj,.  
Index tolerance on surface 1 `pfIgryns  
TIND   1            -0.00100000     0.52606778    -0.01796456     0.00100000     0.56121811     0.01718578 H#SQ>vyAV  
Change in Focus                :       0.000000                            0.000000 ':vZ&  
Index tolerance on surface 2 1|MRXK  
TIND   2            -0.00100000     0.55639086     0.01235852     0.00100000     0.53126361    -0.01276872 5daq}hsQs  
Change in Focus                :       0.000000                           -0.000000 3PNdc}h&#  
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Worst offenders: |sZqqgZ-  
Type                      Value      Criterion        Change H$h#n~W~  
TSTY   2            -0.20000000     0.35349910    -0.19053324 P1-eDHYw  
TSTY   2             0.20000000     0.35349910    -0.19053324 :-1|dE)U  
TSTX   2            -0.20000000     0.35349910    -0.19053324 pZnp!!G  
TSTX   2             0.20000000     0.35349910    -0.19053324 +X=*>^G(-  
TSTY   1            -0.20000000     0.42678383    -0.11724851 g_Z tDxz  
TSTY   1             0.20000000     0.42678383    -0.11724851 w>%@Ug["  
TSTX   1            -0.20000000     0.42678383    -0.11724851 _ox+5?>  
TSTX   1             0.20000000     0.42678383    -0.11724851 FJ;I1~??  
TSTY   3            -0.20000000     0.42861670    -0.11541563 h:?^0b!@  
TSTY   3             0.20000000     0.42861670    -0.11541563 oACAC+CP  
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Estimated Performance Changes based upon Root-Sum-Square method: .Kb3VNgwvm  
Nominal MTF                 :     0.54403234 }UhYwJf89  
Estimated change            :    -0.36299231 u:l-qD9=(  
Estimated MTF               :     0.18104003 |./mPV r  
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Compensator Statistics: ')"+ a^c  
Change in back focus: za_b jE  
Minimum            :        -0.000000 "n%s>@$  
Maximum            :         0.000000 IO\4dU)  
Mean               :        -0.000000 <u64)8'  
Standard Deviation :         0.000000 c#n 2
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Monte Carlo Analysis: |6E_N5~  
Number of trials: 20 T`&zQQ6F'  
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Initial Statistics: Normal Distribution mO>L]<O  
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  Trial       Criterion        Change \2\{c1df  
      1     0.42804416    -0.11598818 2*:q$c  
Change in Focus                :      -0.400171 n#(pT3&  
      2     0.54384387    -0.00018847 QZzamT)"  
Change in Focus                :       1.018470 jeC=s~  
      3     0.44510003    -0.09893230 f"ezmZI  
Change in Focus                :      -0.601922 ]S6Gz/4aV+  
      4     0.18154684    -0.36248550 }Le]qR9Y]  
Change in Focus                :       0.920681 6Tl6A>%s  
      5     0.28665820    -0.25737414 -o ).<&#  
Change in Focus                :       1.253875 7UfNz60+~  
      6     0.21263372    -0.33139862 .GrOdDK$ns  
Change in Focus                :      -0.903878 ]5ZXgz  
      7     0.40051424    -0.14351809 |mEWN/@C  
Change in Focus                :      -1.354815 MEDh  
      8     0.48754161    -0.05649072 %* "+kwZ  
Change in Focus                :       0.215922 ~>u.d  
      9     0.40357468    -0.14045766 bZnOX*y]  
Change in Focus                :       0.281783 -#v~;Ci  
     10     0.26315315    -0.28087919 B~]Kqp7yU  
Change in Focus                :      -1.048393 }3(!kW  
     11     0.26120585    -0.28282649 XM$~HG  
Change in Focus                :       1.017611 oZ'a}kF  
     12     0.24033815    -0.30369419 y* +y&  
Change in Focus                :      -0.109292 /R#zu_i  
     13     0.37164046    -0.17239188 vSgT36ZF  
Change in Focus                :      -0.692430 ]VI^
hhf  
     14     0.48597489    -0.05805744 28MMH Q  
Change in Focus                :      -0.662040 Z vysLHj  
     15     0.21462327    -0.32940907 7N$2N!I(  
Change in Focus                :       1.611296 /fI}QY1  
     16     0.43378226    -0.11025008 Itl8#LpLM  
Change in Focus                :      -0.640081 y'R}  
     17     0.39321881    -0.15081353 LPvp (1  
Change in Focus                :       0.914906 cn'>dz3v  
     18     0.20692530    -0.33710703 }%wd1`l7  
Change in Focus                :       0.801607 -&Rv=q>  
     19     0.51374068    -0.03029165 mQ[$U  
Change in Focus                :       0.947293 {2\Y%Y'}*  
     20     0.38013374    -0.16389860 f}:C~L!  
Change in Focus                :       0.667010 aacy5E  
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Number of traceable Monte Carlo files generated: 20 Y ;Ym=n'  
>*-%:ub  
Nominal     0.54403234 &o:5lxR{  
Best        0.54384387    Trial     2 R/hf"E1  
Worst       0.18154684    Trial     4 3jx%]S^z|  
Mean        0.35770970 HbTVuf o
 
Std Dev     0.11156454 H/,KY/>i  
Bx?3E^!T  
xGd60"w2  
Compensator Statistics: &YhAB\Rw  
Change in back focus: j\y;~ V  
Minimum            :        -1.354815 8`4M
4"lj  
Maximum            :         1.611296 pBsb>wvej  
Mean               :         0.161872 3?93Pj3oPt  
Standard Deviation :         0.869664 Hm-#Mpw  
5!c/J:z  
90% >       0.20977951               u64#,mC[*  
80% >       0.22748071               GBJLB  
50% >       0.38667627               ]2AOW}=  
20% >       0.46553746               oi #B7  
10% >       0.50064115                `4"8@>D  
T4eJ:u*;  
End of Run. 'xW=qboOp  
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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 ;n&95t1$  

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 rOJ>lPs  
4]d^L>  
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                 !BQt+4G7  
80% >       0.22748071                 9*"  
50% >       0.38667627                 ;,{_=n>  
20% >       0.46553746                 @c~Z0+Ji  
10% >       0.50064115 x@#>l8k?  
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最后这个数值是MTF值呢，还是MTF的公差？ h.<f%&)F  
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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？？？   ?:R]p2ID  
i?T-6
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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  : \%7*@&  
90% >       0.20977951                 M+ [ho]  
80% >       0.22748071                 TgkVd]4%  
50% >       0.38667627                 rbvk.:"^w  
20% >       0.46553746                 UytMnJ88  
10% >       0.50064115 7I3_$uF  
....... oc1BOW z  

dN2JOyS  
:^7w  
这些数值都是MTF值

Criterion           : Geometric MTF average S&T at 30.0000 cycles per mm   FGDVBUY@  
Mode                : Sensitivities =W
TSaC  
Sampling            : 2 z+MH co"  
Nominal Criterion   : 0.54403234 wOAR NrPx2  
Test Wavelength     : 0.6328 @7 Ry{,A  
8c5YX  
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？ }$_@yt<{W@  
/DAR'9@h  
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