[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 $p0D9mF  
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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 SH=S>  
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图片:2.jpg

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然后运行分析的结果如下： ro<w8V9.a  
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Analysis of Tolerances mIYKzu_k=  
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File : E:\光学设计资料\zemax练习\f500.ZMX sGtxqnX:J  
Title: JluA?B7E  
Date : TUE JUN 21 2011 *k,3@_5  
^$O(oE(D  
Units are Millimeters. ),B/NZ/-  
All changes are computed using linear differences. vvxD}p=y  
*kK +Nvt8s  
Paraxial Focus compensation only. /N*<Fq7w~  
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1 [c  
WARNING: Solves should be removed prior to tolerancing. [9Rh"H;h  
)z74,n7-  
Mnemonics: t!/~_}eDJ  
TFRN: Tolerance on curvature in fringes. k`N*_/(|n  
TTHI: Tolerance on thickness. r^C(|Vx  
TSDX: Tolerance on surface decentering in x. %gFIu.c  
TSDY: Tolerance on surface decentering in y. 5!Y\STn  
TSTX: Tolerance on surface tilt in x (degrees). 1z&"V}y  
TSTY: Tolerance on surface tilt in y (degrees). 9ETdO,L)f  
TIRR: Tolerance on irregularity (fringes). O]hUOc`k  
TIND: Tolerance on Nd index of refraction. `V V>AA5  
TEDX: Tolerance on element decentering in x. J9NuqV3  
TEDY: Tolerance on element decentering in y. v+Y^mV`|  
TETX: Tolerance on element tilt in x (degrees). >m1b/J3#  
TETY: Tolerance on element tilt in y (degrees). a1I-d=]  
Z'k?lkB2i  
WARNING: RAY AIMING IS OFF. Very loose tolerances may not be computed accurately.
Y1sK sdV  
}DjVZ48  
WARNING: Boundary constraints on compensators will be ignored. ,=Wj*S)~  
4+d(d  
Criterion           : Geometric MTF average S&T at 30.0000 cycles per mm .Er+*j;&w  
Mode                : Sensitivities FN!?o:|(  
Sampling            : 2 l}^ziY!  
Nominal Criterion   : 0.54403234 ;k#_/c  
Test Wavelength     : 0.6328 jJ<&!=  
Z9 ws{8@_  
]O:8o<0  
Fields: XY Symmetric Angle in degrees bIBF2m4  
#      X-Field      Y-Field       Weight    VDX    VDY    VCX    VCY 1=IOio4
U  
1   0.000E+000   0.000E+000   1.000E+000  0.000  0.000  0.000  0.000 |iBf6smF  
W9c&"T9JT  
Sensitivity Analysis: ^J7q,tvbJ  
m ne)c[Qn  
                 |----------------- Minimum ----------------| |----------------- Maximum ----------------| EmUn&p%hI  
Type                      Value      Criterion        Change          Value      Criterion        Change &glh >9:G  
Fringe tolerance on surface 1 w]T_%mdk  
TFRN   1            -1.00000000     0.54257256    -0.00145977     1.00000000     0.54548607     0.00145374 |?0MRX0'g  
Change in Focus                :      -0.000000                            0.000000 ~s'}_5;VY  
Fringe tolerance on surface 2 =*ErN  
TFRN   2            -1.00000000     0.54177471    -0.00225762     1.00000000     0.54627463     0.00224230 _$IWr)8f  
Change in Focus                :       0.000000                            0.000000 `fEzE\\!*  
Fringe tolerance on surface 3 Q!IqvmO  
TFRN   3            -1.00000000     0.54779866     0.00376632     1.00000000     0.54022572    -0.00380662 ;rL1[qwk  
Change in Focus                :      -0.000000                            0.000000 X!z-J>  
Thickness tolerance on surface 1 xu-bn  
TTHI   1   3        -0.20000000     0.54321462    -0.00081772     0.20000000     0.54484759     0.00081525 BRu}"29  
Change in Focus                :       0.000000                            0.000000 x{w|Hy  
Thickness tolerance on surface 2 F^Jz   
TTHI   2   3        -0.20000000     0.54478712     0.00075478     0.20000000     0.54327558    -0.00075675 Q Rr9|p{  
Change in Focus                :       0.000000                           -0.000000 S#p_Y^A  
Decenter X tolerance on surfaces 1 through 3 S m=ln)G=  
TEDX   1   3        -0.20000000     0.54401464   -1.7700E-005     0.20000000     0.54401464   -1.7700E-005  }+/
Vk  
Change in Focus                :       0.000000                            0.000000 7#UJ444b~  
Decenter Y tolerance on surfaces 1 through 3 R
LQ*&[A}  
TEDY   1   3        -0.20000000     0.54401464   -1.7700E-005     0.20000000     0.54401464   -1.7700E-005 9$X" D  
Change in Focus                :       0.000000                            0.000000 y7#+VF`xf  
Tilt X tolerance on surfaces 1 through 3 (degrees) {_\dwe9  
TETX   1   3        -0.20000000     0.54897548     0.00494314     0.20000000     0.54897548     0.00494314 'Bt!X^  
Change in Focus                :       0.000000                            0.000000 oaq,4
FT  
Tilt Y tolerance on surfaces 1 through 3 (degrees) A~E S{Zkh  
TETY   1   3        -0.20000000     0.54897548     0.00494314     0.20000000     0.54897548     0.00494314 Ei]SksV>*  
Change in Focus                :       0.000000                            0.000000 hTv*4J&@|  
Decenter X tolerance on surface 1 (HeSL),1  
TSDX   1            -0.20000000     0.53999563    -0.00403671     0.20000000     0.53999563    -0.00403671 m!<FlEkN  
Change in Focus                :       0.000000                            0.000000 `:r-&QdU o  
Decenter Y tolerance on surface 1 lAA6tlc#C  
TSDY   1            -0.20000000     0.53999563    -0.00403671     0.20000000     0.53999563    -0.00403671 gk8v{'0Er  
Change in Focus                :       0.000000                            0.000000 k-^^A
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Tilt X tolerance on surface (degrees) 1 1 <T|  
TSTX   1            -0.20000000     0.42678383    -0.11724851     0.20000000     0.42678383    -0.11724851
c%b|+4 }x  
Change in Focus                :       0.000000                            0.000000 J#@+1 Nt  
Tilt Y tolerance on surface (degrees) 1 G2!<C-T{2  
TSTY   1            -0.20000000     0.42678383    -0.11724851     0.20000000     0.42678383    -0.11724851 pQ7elv]  
Change in Focus                :       0.000000                            0.000000 GK11fZpO:i  
Decenter X tolerance on surface 2 >{Mv+  
TSDX   2            -0.20000000     0.51705427    -0.02697807     0.20000000     0.51705427    -0.02697807 o\Fv~^  
Change in Focus                :       0.000000                            0.000000 _M7|:*  
Decenter Y tolerance on surface 2 0;`FS/[(f  
TSDY   2            -0.20000000     0.51705427    -0.02697807     0.20000000     0.51705427    -0.02697807 M{)eA<6  
Change in Focus                :       0.000000                            0.000000 P>~Usuf4  
Tilt X tolerance on surface (degrees) 2 [N[4\W!!  
TSTX   2            -0.20000000     0.35349910    -0.19053324     0.20000000     0.35349910    -0.19053324 j8?! J^TC  
Change in Focus                :       0.000000                            0.000000 q%A>q;l:  
Tilt Y tolerance on surface (degrees) 2 ~qL/P 5*+  
TSTY   2            -0.20000000     0.35349910    -0.19053324     0.20000000     0.35349910    -0.19053324 -3d`e2^&}  
Change in Focus                :       0.000000                            0.000000 <Mo{o2F=  
Decenter X tolerance on surface 3 k:j?8o3  
TSDX   3            -0.20000000     0.53419039    -0.00984195     0.20000000     0.53419039    -0.00984195 "BpDlTYM  
Change in Focus                :       0.000000                            0.000000 l>i:M#z&  
Decenter Y tolerance on surface 3 oLlfqV,|L\  
TSDY   3            -0.20000000     0.53419039    -0.00984195     0.20000000     0.53419039    -0.00984195 *&_A4)  
Change in Focus                :       0.000000                            0.000000 D2o|.e<r  
Tilt X tolerance on surface (degrees) 3 {s6#h#U  
TSTX   3            -0.20000000     0.42861670    -0.11541563     0.20000000     0.42861670    -0.11541563 W>{&" 5  
Change in Focus                :       0.000000                            0.000000 r0&LjH&R  
Tilt Y tolerance on surface (degrees) 3 Um`KmM3  
TSTY   3            -0.20000000     0.42861670    -0.11541563     0.20000000     0.42861670    -0.11541563 3ErV" R4"$  
Change in Focus                :       0.000000                            0.000000 cyjgi /Z  
Irregularity of surface 1 in fringes v=dN$B5y3  
TIRR   1            -0.20000000     0.50973587    -0.03429647     0.20000000     0.57333868     0.02930634 *j1Skd.#At  
Change in Focus                :       0.000000                            0.000000 wLO"[,  
Irregularity of surface 2 in fringes =:R${F  
TIRR   2            -0.20000000     0.53400904    -0.01002330     0.20000000     0.55360281     0.00957047 Ae^4  
Change in Focus                :       0.000000                            0.000000 }7fzEo`g  
Irregularity of surface 3 in fringes r}|)oG,=  
TIRR   3            -0.20000000     0.58078982     0.03675748     0.20000000     0.49904394    -0.04498840 ^pfM/LQ@  
Change in Focus                :       0.000000                            0.000000 SZ4@GK  
Index tolerance on surface 1 @LU[po1I  
TIND   1            -0.00100000     0.52606778    -0.01796456     0.00100000     0.56121811     0.01718578 T2|<YJ=  
Change in Focus                :       0.000000                            0.000000 WoSKN7*  
Index tolerance on surface 2 F$:mGyl5_  
TIND   2            -0.00100000     0.55639086     0.01235852     0.00100000     0.53126361    -0.01276872 w+\RSqz/  
Change in Focus                :       0.000000                           -0.000000 9/&1lFKJ  
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Worst offenders: _m#TL60m  
Type                      Value      Criterion        Change *z~
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TSTY   2            -0.20000000     0.35349910    -0.19053324 h"2^` )!u  
TSTY   2             0.20000000     0.35349910    -0.19053324 @ K2Ncb7  
TSTX   2            -0.20000000     0.35349910    -0.19053324 3XbFg%8YG  
TSTX   2             0.20000000     0.35349910    -0.19053324 l<"B[  
TSTY   1            -0.20000000     0.42678383    -0.11724851 R iLq
MSq  
TSTY   1             0.20000000     0.42678383    -0.11724851 %2G3+T8*x  
TSTX   1            -0.20000000     0.42678383    -0.11724851 m<MN.R7  
TSTX   1             0.20000000     0.42678383    -0.11724851
&Dp&  
TSTY   3            -0.20000000     0.42861670    -0.11541563 [a^<2V!vMn  
TSTY   3             0.20000000     0.42861670    -0.11541563 3],(oQq^  
4h}\Kl  
Estimated Performance Changes based upon Root-Sum-Square method: 5rA>2<\pQ  
Nominal MTF                 :     0.54403234 >u .u#de  
Estimated change            :    -0.36299231 VF7H0XR/k5  
Estimated MTF               :     0.18104003 <`A!9+  
H3JDA^5  
Compensator Statistics: 
TUp%Cx  
Change in back focus: e5ww~%,  
Minimum            :        -0.000000 = j l(Q  
Maximum            :         0.000000 ')fIa2dO/  
Mean               :        -0.000000 4 T/ ~erc  
Standard Deviation :         0.000000 *Hh*!ePp  
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Monte Carlo Analysis: ,zBc-Cm  
Number of trials: 20 WCI'Kh 
 
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Initial Statistics: Normal Distribution (i@(ZG]/  
{N-*eV9#  
  Trial       Criterion        Change w;Pe_m7\EO  
      1     0.42804416    -0.11598818 N,cj[6;T%  
Change in Focus                :      -0.400171 =D 5!Xq'|  
      2     0.54384387    -0.00018847 .d4&s7n0  
Change in Focus                :       1.018470 DsBZ%  
      3     0.44510003    -0.09893230 Lg6>\Z4
 
Change in Focus                :      -0.601922 I?<ibLpX  
      4     0.18154684    -0.36248550 3ZYrNul"  
Change in Focus                :       0.920681 ljh,%#95=  
      5     0.28665820    -0.25737414 -]Oi/i,{  
Change in Focus                :       1.253875 W5RZsS]  
      6     0.21263372    -0.33139862 q1%xk
=8  
Change in Focus                :      -0.903878 V Z60  
      7     0.40051424    -0.14351809 2|+4xqNJm  
Change in Focus                :      -1.354815 7^h*rL9  
      8     0.48754161    -0.05649072 gLg\W3TOi  
Change in Focus                :       0.215922 00A2[gO9  
      9     0.40357468    -0.14045766 V4%7
Xj  
Change in Focus                :       0.281783 %vrUk;<35  
     10     0.26315315    -0.28087919 6rAenK-%  
Change in Focus                :      -1.048393 sQY0Xys<4  
     11     0.26120585    -0.28282649 ^F/H?V/PX  
Change in Focus                :       1.017611 dC">AW  
     12     0.24033815    -0.30369419 gHU0Pr9'  
Change in Focus                :      -0.109292 m] IN-'  
     13     0.37164046    -0.17239188 YW-Ge  
Change in Focus                :      -0.692430 YccD^w[`B  
     14     0.48597489    -0.05805744 C5#$NV99p  
Change in Focus                :      -0.662040 }Ot2; T  
     15     0.21462327    -0.32940907 rP&.`m88n  
Change in Focus                :       1.611296 \OF"hPq  
     16     0.43378226    -0.11025008
7:S)J~s*O  
Change in Focus                :      -0.640081 _5768G`P  
     17     0.39321881    -0.15081353 &e
X^ll  
Change in Focus                :       0.914906 l8!n!sC[
,  
     18     0.20692530    -0.33710703 HBgt!D0MZ  
Change in Focus                :       0.801607 ^(yU)k3pu  
     19     0.51374068    -0.03029165 sX
=_|<[  
Change in Focus                :       0.947293 Y3f2RdGl  
     20     0.38013374    -0.16389860 ^G(+sb[t  
Change in Focus                :       0.667010 {UEZ:a  
0o&7l%Y/  
Number of traceable Monte Carlo files generated: 20 ?|we.{  
Aj2yAg  
Nominal     0.54403234 lV<j?I~?Q  
Best        0.54384387    Trial     2 ,O"zz7  
Worst       0.18154684    Trial     4 ;jpsH?3g
 
Mean        0.35770970  jQ?6I1o  
Std Dev     0.11156454 nSV OS6  
[,p[%Dza  

QW}N,j$  
Compensator Statistics: cH\.-5NQ  
Change in back focus: C&KH.h/N  
Minimum            :        -1.354815 e?!A]2  
Maximum            :         1.611296 Z&0*\.6S~  
Mean               :         0.161872 UPJ3YpK  
Standard Deviation :         0.869664 #s^~'2^%4  
`zOQ*Y&  
90% >       0.20977951               c27A)`   
80% >       0.22748071               ,Tc598D  
50% >       0.38667627               $[8GFv  
20% >       0.46553746               !BW6l)=L  
10% >       0.50064115                go$zi5{h#  
*4
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End of Run. iOzY8M+N(  
;?0k>  
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 E h>qUa  

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 8!{F6DG  
x0_$,Tz@  
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                 -mlBr63Bj  
80% >       0.22748071                 ErNL^Se1  
50% >       0.38667627                 2#bpWk9  
20% >       0.46553746                 ' s6SKjZS  
10% >       0.50064115 ah\yw  
^%V^\DK  
最后这个数值是MTF值呢，还是MTF的公差？ CG(G){u&  
L`Lro:E?kL  
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？？？   ,dM}B-  
.6m%/-whS  
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  : KiXRBFo  
90% >       0.20977951                 ]m _<lRye  
80% >       0.22748071                 To_Y 8 G  
50% >       0.38667627                 |~
'PEY  
20% >       0.46553746                 z?NMQ8l|:6  
10% >       0.50064115 Rt &Oz!TQ  
....... ){u/v[O9"  

3oH.1M/  
llbf(!  
这些数值都是MTF值

Criterion           : Geometric MTF average S&T at 30.0000 cycles per mm   T*
AXS|=ju  
Mode                : Sensitivities *] H8X=[x  
Sampling            : 2 ZtS>'W8l  
Nominal Criterion   : 0.54403234 =l7@YCj5c  
Test Wavelength     : 0.6328 ZCP r`H  
U3R;'80 f  
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？ v:$Ka@v6  
9L2]PU v  
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