[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 hB P]^~(  
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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 F8_pwJUpf-  
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图片:2.jpg

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然后运行分析的结果如下： `q7I;w+g  
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Analysis of Tolerances nLto=tNUO  
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File : E:\光学设计资料\zemax练习\f500.ZMX JP!$uK{u  
Title: #q==GT7  
Date : TUE JUN 21 2011 F=iz\O!6  
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Units are Millimeters. Tud[VS?99  
All changes are computed using linear differences. m`nv4i#o  
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Paraxial Focus compensation only. YOGwQ  
(mt,:hX  
WARNING: Solves should be removed prior to tolerancing. iP|h];a+@  
nHD4J;l  
Mnemonics: Z
=825[p  
TFRN: Tolerance on curvature in fringes. e`k 2g^  
TTHI: Tolerance on thickness. hP3I_I[qF}  
TSDX: Tolerance on surface decentering in x. zhHQJcQ.  
TSDY: Tolerance on surface decentering in y. )P:TVe9`  
TSTX: Tolerance on surface tilt in x (degrees). e_k1pox]l  
TSTY: Tolerance on surface tilt in y (degrees). B wtD!de$  
TIRR: Tolerance on irregularity (fringes). T>vHZZiO  
TIND: Tolerance on Nd index of refraction. }k\a~<'X  
TEDX: Tolerance on element decentering in x. )w;XicT  
TEDY: Tolerance on element decentering in y. N=tyaS(YJ
 
TETX: Tolerance on element tilt in x (degrees). |5e/.T$  
TETY: Tolerance on element tilt in y (degrees). ^Ye
nS6`F  
W$?1" F.  
WARNING: RAY AIMING IS OFF. Very loose tolerances may not be computed accurately. f*W<N06EZ  
9Hlu%R  
WARNING: Boundary constraints on compensators will be ignored. ^Bm9yR  
B`"-~4YAf  
Criterion           : Geometric MTF average S&T at 30.0000 cycles per mm j,E
E`g&  
Mode                : Sensitivities [g&Q_+,j  
Sampling            : 2 :V}8a!3h  
Nominal Criterion   : 0.54403234 sw{EV0&>m  
Test Wavelength     : 0.6328 c!{.BgGN  
>9<h?F%S  
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Fields: XY Symmetric Angle in degrees
[rqq*_eB  
#      X-Field      Y-Field       Weight    VDX    VDY    VCX    VCY (zk'i13#6  
1   0.000E+000   0.000E+000   1.000E+000  0.000  0.000  0.000  0.000 9e=F  
jY87NHg  
Sensitivity Analysis: *bmk(%g  
kl3#&>e  
                 |----------------- Minimum ----------------| |----------------- Maximum ----------------| Yfxc$ub  
Type                      Value      Criterion        Change          Value      Criterion        Change @iC
!Q>D  
Fringe tolerance on surface 1 Z0b1E  
TFRN   1            -1.00000000     0.54257256    -0.00145977     1.00000000     0.54548607     0.00145374 ',m,wp`  
Change in Focus                :      -0.000000                            0.000000 VI" ,E}  
Fringe tolerance on surface 2 +N
c|cj  
TFRN   2            -1.00000000     0.54177471    -0.00225762     1.00000000     0.54627463     0.00224230 YCw^u  
Change in Focus                :       0.000000                            0.000000 ;X|;/@@  
Fringe tolerance on surface 3 h-lMrI)U?h  
TFRN   3            -1.00000000     0.54779866     0.00376632     1.00000000     0.54022572    -0.00380662 2ZIf@C{P.  
Change in Focus                :      -0.000000                            0.000000 ?kE2S6j5  
Thickness tolerance on surface 1 cl:*Q{(Cjk  
TTHI   1   3        -0.20000000     0.54321462    -0.00081772     0.20000000     0.54484759     0.00081525 uW Q`  
Change in Focus                :       0.000000                            0.000000 }-: d*YtK  
Thickness tolerance on surface 2 P*I
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TTHI   2   3        -0.20000000     0.54478712     0.00075478     0.20000000     0.54327558    -0.00075675 N4)&K[  
Change in Focus                :       0.000000                           -0.000000 ~z32%k  
Decenter X tolerance on surfaces 1 through 3 2[j|:Ng7  
TEDX   1   3        -0.20000000     0.54401464   -1.7700E-005     0.20000000     0.54401464   -1.7700E-005 /YUf('b  
Change in Focus                :       0.000000                            0.000000 .7~Kfm@2  
Decenter Y tolerance on surfaces 1 through 3 0 I;>du  
TEDY   1   3        -0.20000000     0.54401464   -1.7700E-005     0.20000000     0.54401464   -1.7700E-005 -7m;rD4J  
Change in Focus                :       0.000000                            0.000000 -}4H'%Z(i  
Tilt X tolerance on surfaces 1 through 3 (degrees) ]y-r
 I  
TETX   1   3        -0.20000000     0.54897548     0.00494314     0.20000000     0.54897548     0.00494314 N|1J@"H  
Change in Focus                :       0.000000                            0.000000 L?Wl#wP\;*  
Tilt Y tolerance on surfaces 1 through 3 (degrees) P,I3E?! j  
TETY   1   3        -0.20000000     0.54897548     0.00494314     0.20000000     0.54897548     0.00494314 5jx{O${u  
Change in Focus                :       0.000000                            0.000000 gJvc<]W8!  
Decenter X tolerance on surface 1 Axj<e!{D  
TSDX   1            -0.20000000     0.53999563    -0.00403671     0.20000000     0.53999563    -0.00403671 z_A%>E4  
Change in Focus                :       0.000000                            0.000000 zx#d_SVi  
Decenter Y tolerance on surface 1 m='+->O*'l  
TSDY   1            -0.20000000     0.53999563    -0.00403671     0.20000000     0.53999563    -0.00403671 cf0em!  
Change in Focus                :       0.000000                            0.000000 Z#7HuAF{]  
Tilt X tolerance on surface (degrees) 1 7F}I.,<W  
TSTX   1            -0.20000000     0.42678383    -0.11724851     0.20000000     0.42678383    -0.11724851 7@+0E2'  
Change in Focus                :       0.000000                            0.000000 ?em)om  
Tilt Y tolerance on surface (degrees) 1 bgYM  
TSTY   1            -0.20000000     0.42678383    -0.11724851     0.20000000     0.42678383    -0.11724851 [m}x  
Change in Focus                :       0.000000                            0.000000 ,!sAr;Rk`  
Decenter X tolerance on surface 2 2S!=2u+7  
TSDX   2            -0.20000000     0.51705427    -0.02697807     0.20000000     0.51705427    -0.02697807 ;#rtV;  
Change in Focus                :       0.000000                            0.000000 mI0|lp 1$  
Decenter Y tolerance on surface 2 {) Y &Vr5  
TSDY   2            -0.20000000     0.51705427    -0.02697807     0.20000000     0.51705427    -0.02697807 {nj\dU  
Change in Focus                :       0.000000                            0.000000 Y*w<~m  
Tilt X tolerance on surface (degrees) 2 6JK;]Ah  
TSTX   2            -0.20000000     0.35349910    -0.19053324     0.20000000     0.35349910    -0.19053324 aL#b8dCy'  
Change in Focus                :       0.000000                            0.000000 Fo~C,@/Qt  
Tilt Y tolerance on surface (degrees) 2 p)TH^87  
TSTY   2            -0.20000000     0.35349910    -0.19053324     0.20000000     0.35349910    -0.19053324 :4(7W[r6  
Change in Focus                :       0.000000                            0.000000 r
p(`V@x3  
Decenter X tolerance on surface 3 Ge(r6"%7  
TSDX   3            -0.20000000     0.53419039    -0.00984195     0.20000000     0.53419039    -0.00984195 .JQR5R |Q  
Change in Focus                :       0.000000                            0.000000 Mz
J5_}  
Decenter Y tolerance on surface 3 2uiiTg>  
TSDY   3            -0.20000000     0.53419039    -0.00984195     0.20000000     0.53419039    -0.00984195 }"q1B  
Change in Focus                :       0.000000                            0.000000 #H
7(dT  
Tilt X tolerance on surface (degrees) 3 nM R_ ?g  
TSTX   3            -0.20000000     0.42861670    -0.11541563     0.20000000     0.42861670    -0.11541563 ]Ms~;MXlx5  
Change in Focus                :       0.000000                            0.000000 dQ;rO$co  
Tilt Y tolerance on surface (degrees) 3 ap;*qiNFQ  
TSTY   3            -0.20000000     0.42861670    -0.11541563     0.20000000     0.42861670    -0.11541563 |$bZO`^  
Change in Focus                :       0.000000                            0.000000 Nm\I_wjX  
Irregularity of surface 1 in fringes K;[V`)d'  
TIRR   1            -0.20000000     0.50973587    -0.03429647     0.20000000     0.57333868     0.02930634 E.6^~'/  
Change in Focus                :       0.000000                            0.000000 ,:=E+sS  
Irregularity of surface 2 in fringes (">!vz  
TIRR   2            -0.20000000     0.53400904    -0.01002330     0.20000000     0.55360281     0.00957047 y}#bCRy~.A  
Change in Focus                :       0.000000                            0.000000 Z~$&
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Irregularity of surface 3 in fringes 9W'#4  
TIRR   3            -0.20000000     0.58078982     0.03675748     0.20000000     0.49904394    -0.04498840 wond>m 3  
Change in Focus                :       0.000000                            0.000000 hr]NW>;  
Index tolerance on surface 1 mnu7Y([2>  
TIND   1            -0.00100000     0.52606778    -0.01796456     0.00100000     0.56121811     0.01718578 &?zJ|7rh@|  
Change in Focus                :       0.000000                            0.000000 .HGEddcC  
Index tolerance on surface 2 W&+UF'F2  
TIND   2            -0.00100000     0.55639086     0.01235852     0.00100000     0.53126361    -0.01276872 yDy3;*lE  
Change in Focus                :       0.000000                           -0.000000 ~^Vt)/}Q  
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Worst offenders: yVh]hL#4+w  
Type                      Value      Criterion        Change WdIr3  
TSTY   2            -0.20000000     0.35349910    -0.19053324 PPE:@!u<  
TSTY   2             0.20000000     0.35349910    -0.19053324 M=0I 3o}J  
TSTX   2            -0.20000000     0.35349910    -0.19053324 {#Gr=iv~N  
TSTX   2             0.20000000     0.35349910    -0.19053324 3R4-MK  
TSTY   1            -0.20000000     0.42678383    -0.11724851 ;=UrIA@y;=  
TSTY   1             0.20000000     0.42678383    -0.11724851 of{wZU\J+9  
TSTX   1            -0.20000000     0.42678383    -0.11724851 eJ7A.O  
TSTX   1             0.20000000     0.42678383    -0.11724851 ih1SN,/  
TSTY   3            -0.20000000     0.42861670    -0.11541563 B;7L:  
TSTY   3             0.20000000     0.42861670    -0.11541563 EZBk;*=B  
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Estimated Performance Changes based upon Root-Sum-Square method: O a-ZeCq  
Nominal MTF                 :     0.54403234
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Estimated change            :    -0.36299231 z,DEBRT+  
Estimated MTF               :     0.18104003  /H!I90  
K6|*-Wo.  
Compensator Statistics: 9LCV"xgX  
Change in back focus: 5F <zW-;  
Minimum            :        -0.000000 eJJvEvZ,  
Maximum            :         0.000000 "p$`CUtI  
Mean               :        -0.000000 Pf@8C{I  
Standard Deviation :         0.000000 Cww$ A %}  
Z8nNZ<k  
Monte Carlo Analysis: 2}509X(*  
Number of trials: 20 s(wbsRVP8  
\7("bB=  
Initial Statistics: Normal Distribution ,v)@&1Wh:  
4-cnkv\~  
  Trial       Criterion        Change !:e}d+F  
      1     0.42804416    -0.11598818 -?'u"*#1,  
Change in Focus                :      -0.400171 f4X?\eGT  
      2     0.54384387    -0.00018847 YSv\T '3  
Change in Focus                :       1.018470 Hyq|%\A  
      3     0.44510003    -0.09893230 #
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Change in Focus                :      -0.601922 Q1s`d?P/`  
      4     0.18154684    -0.36248550 SV8rZ
WJ  
Change in Focus                :       0.920681 mC J/gWDY  
      5     0.28665820    -0.25737414 ZJ+q<n_4}  
Change in Focus                :       1.253875 D!)'c(b  
      6     0.21263372    -0.33139862 a.c2ScXG  
Change in Focus                :      -0.903878 xN2{Vi{ad  
      7     0.40051424    -0.14351809 _=4Dh/Dv  
Change in Focus                :      -1.354815 e&]XiV'  
      8     0.48754161    -0.05649072 bO^%#<7  
Change in Focus                :       0.215922 #7gOtP#{  
      9     0.40357468    -0.14045766 ~u}[VP  
Change in Focus                :       0.281783 rj<%_d'Z`  
     10     0.26315315    -0.28087919 ^qV*W1|0  
Change in Focus                :      -1.048393 ~Bj-n6QDE  
     11     0.26120585    -0.28282649 ;:"~utL7  
Change in Focus                :       1.017611 mn 8A%6W  
     12     0.24033815    -0.30369419 O
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Change in Focus                :      -0.109292 fN
t  
     13     0.37164046    -0.17239188 Ig5J_Z
^]b  
Change in Focus                :      -0.692430 #lV&U
  
     14     0.48597489    -0.05805744 (Dc dR:/=  
Change in Focus                :      -0.662040 WY<ip<  
     15     0.21462327    -0.32940907 h2uO+qEsu  
Change in Focus                :       1.611296 ng<|lsZd  
     16     0.43378226    -0.11025008 nQ/(*d  
Change in Focus                :      -0.640081 q(a6@6f"kD  
     17     0.39321881    -0.15081353 ;k!Ej-(  
Change in Focus                :       0.914906 b4,yLVi<T  
     18     0.20692530    -0.33710703 7xWX:2l*?  
Change in Focus                :       0.801607 NIV&)`w  
     19     0.51374068    -0.03029165 #pOW2 Uj8\  
Change in Focus                :       0.947293 -,zNFC:6g  
     20     0.38013374    -0.16389860 J,P7k$t2vv  
Change in Focus                :       0.667010 t{x&|%u  
9)H~I/9Y  
Number of traceable Monte Carlo files generated: 20 Kd^ ._  
U/{cYX  
Nominal     0.54403234 iCz,|;w%  
Best        0.54384387    Trial     2 |@V<}2zCZ  
Worst       0.18154684    Trial     4 o.y4&bC14;  
Mean        0.35770970 &z%7Nu  
Std Dev     0.11156454 Q,)G_lO  
2BRY2EF  
[.3M>,)+-  
Compensator Statistics: L;gr
H5K5  
Change in back focus: #gi&pR'$  
Minimum            :        -1.354815 RHE< QG  
Maximum            :         1.611296 V

I37  
Mean               :         0.161872 w[]7{D];  
Standard Deviation :         0.869664 tPFV6n i  
O:k@'&  
90% >       0.20977951               Nu|?s-  
80% >       0.22748071               qRB&R$  
50% >       0.38667627               qj=12;  
20% >       0.46553746               IvH0sS`F  
10% >       0.50064115                IsnC_"f  
>&BgF*mm  
End of Run. O+z-6:`  
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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 [R& P.E7w'  

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 c69B[Vjb  
gp(w6:w  
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                 )M^;6S  
80% >       0.22748071                 e#&[4tQF  
50% >       0.38667627                 | ql!@M(p  
20% >       0.46553746                 ,cgC_%  
10% >       0.50064115 &[JI L=m5  
Og-Mnx3  
最后这个数值是MTF值呢，还是MTF的公差？ "eGS~-DVK  
r}03&h~Hc&  
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？？？   V
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;41s&~eR  
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  : H
i.JL  
90% >       0.20977951                 _jeub [  
80% >       0.22748071                 S :(1=@  
50% >       0.38667627                 lzuPE,h  
20% >       0.46553746                 =PO/Q|-v?  
10% >       0.50064115 S0p]:r";x  
....... QKHmOVh]  

Y]P $|JW):  
17};I7  
这些数值都是MTF值

Criterion           : Geometric MTF average S&T at 30.0000 cycles per mm   D0"+E*   
Mode                : Sensitivities  NPf,9c;  
Sampling            : 2 :()4eK/\  
Nominal Criterion   : 0.54403234 E}"&?oY  
Test Wavelength     : 0.6328 1X#`NUJ?2  
&;%+Hduc  
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？ tgrQ$Yjk  
MTLcLmdO  
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