[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 dj,lbUL  
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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 4Im}!q5;:<  
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图片:2.jpg

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然后运行分析的结果如下： Ex}TDmTu  
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Analysis of Tolerances "tK3h3/Xv  
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File : E:\光学设计资料\zemax练习\f500.ZMX bx".<q(  
Title: Jju?v2y`  
Date : TUE JUN 21 2011 X5tV Xd  
s, #$o3  
Units are Millimeters. Oh}@c~7;  
All changes are computed using linear differences. M9yqJPS}B  
Z\?!&&  
Paraxial Focus compensation only. dt>!=<|k  
wDh&S{N  
WARNING: Solves should be removed prior to tolerancing. 3fop.%(  
pAEJ=Te  
Mnemonics: l
nxA/[`a  
TFRN: Tolerance on curvature in fringes. ~vR<UQz  
TTHI: Tolerance on thickness. 4x/u$Ixzh=  
TSDX: Tolerance on surface decentering in x. PO2]x:  
TSDY: Tolerance on surface decentering in y. 6~k qU4l
L  
TSTX: Tolerance on surface tilt in x (degrees). ."q8 YaW  
TSTY: Tolerance on surface tilt in y (degrees). 0wETv  
TIRR: Tolerance on irregularity (fringes). %#]/]B/4  
TIND: Tolerance on Nd index of refraction. /hyCR___  
TEDX: Tolerance on element decentering in x. =4x-x nA  
TEDY: Tolerance on element decentering in y. OL&VisJ{75  
TETX: Tolerance on element tilt in x (degrees). twTRw:.!f  
TETY: Tolerance on element tilt in y (degrees). jm|zn  
0`WZ  
WARNING: RAY AIMING IS OFF. Very loose tolerances may not be computed accurately. nm,Tng oj  
;Y &2G'  
WARNING: Boundary constraints on compensators will be ignored. AWmJm)  
TF,a`?c`  
Criterion           : Geometric MTF average S&T at 30.0000 cycles per mm k.F(*kh  
Mode                : Sensitivities 495(V(+5  
Sampling            : 2 lU3Xd_v O  
Nominal Criterion   : 0.54403234 VqB9^qJ]!  
Test Wavelength     : 0.6328 gE!`9#..  
?Vr~~v"fg8  
Fg^zz*e  
Fields: XY Symmetric Angle in degrees "\1V^2kMr  
#      X-Field      Y-Field       Weight    VDX    VDY    VCX    VCY ~U4;YlQP  
1   0.000E+000   0.000E+000   1.000E+000  0.000  0.000  0.000  0.000 OoAZ t  
l_=kW!l  
Sensitivity Analysis: SYK?5_804  
RQ51xTOL4]  
                 |----------------- Minimum ----------------| |----------------- Maximum ----------------| rg+3pX\{  
Type                      Value      Criterion        Change          Value      Criterion        Change YpbJoHiSH  
Fringe tolerance on surface 1 tgm(tDL  
TFRN   1            -1.00000000     0.54257256    -0.00145977     1.00000000     0.54548607     0.00145374 :&D$Q 4  
Change in Focus                :      -0.000000                            0.000000 i0&]Ig|;  
Fringe tolerance on surface 2 }Qvoms<k  
TFRN   2            -1.00000000     0.54177471    -0.00225762     1.00000000     0.54627463     0.00224230 CQ%yki  
Change in Focus                :       0.000000                            0.000000 SVyJUd_
  
Fringe tolerance on surface 3 v]KI=!Gs  
TFRN   3            -1.00000000     0.54779866     0.00376632     1.00000000     0.54022572    -0.00380662 @Cd}1OT)  
Change in Focus                :      -0.000000                            0.000000 :!gzx n  
Thickness tolerance on surface 1 s}Sxl0  
TTHI   1   3        -0.20000000     0.54321462    -0.00081772     0.20000000     0.54484759     0.00081525 GEf[k OQ  
Change in Focus                :       0.000000                            0.000000 d`Em)3v  
Thickness tolerance on surface 2 vro5G')  
TTHI   2   3        -0.20000000     0.54478712     0.00075478     0.20000000     0.54327558    -0.00075675 s=|&NlO$  
Change in Focus                :       0.000000                           -0.000000 \~q cYp  
Decenter X tolerance on surfaces 1 through 3 i(>v~T,(  
TEDX   1   3        -0.20000000     0.54401464   -1.7700E-005     0.20000000     0.54401464   -1.7700E-005 qS+Ilg  
Change in Focus                :       0.000000                            0.000000 3H
47 vm(`  
Decenter Y tolerance on surfaces 1 through 3 =R\-mov$  
TEDY   1   3        -0.20000000     0.54401464   -1.7700E-005     0.20000000     0.54401464   -1.7700E-005 /T2f~1R  
Change in Focus                :       0.000000                            0.000000 pDx}~IB  
Tilt X tolerance on surfaces 1 through 3 (degrees) [Z?vC  
TETX   1   3        -0.20000000     0.54897548     0.00494314     0.20000000     0.54897548     0.00494314 A&fh0E (t  
Change in Focus                :       0.000000                            0.000000 Th//uI+  
Tilt Y tolerance on surfaces 1 through 3 (degrees) Pi|oO-M  
TETY   1   3        -0.20000000     0.54897548     0.00494314     0.20000000     0.54897548     0.00494314 6Bm2_B  
Change in Focus                :       0.000000                            0.000000 6hm6h7$F1  
Decenter X tolerance on surface 1 KbV%8nx!!  
TSDX   1            -0.20000000     0.53999563    -0.00403671     0.20000000     0.53999563    -0.00403671 6ypqnOTr  
Change in Focus                :       0.000000                            0.000000 X{riI^(  
Decenter Y tolerance on surface 1 cM'5m  
TSDY   1            -0.20000000     0.53999563    -0.00403671     0.20000000     0.53999563    -0.00403671 }tT*Ch?u  
Change in Focus                :       0.000000                            0.000000 *:A)j?(  
Tilt X tolerance on surface (degrees) 1 QWGFXy,=1  
TSTX   1            -0.20000000     0.42678383    -0.11724851     0.20000000     0.42678383    -0.11724851 "ae55ft//  
Change in Focus                :       0.000000                            0.000000 %z0@4Gq  
Tilt Y tolerance on surface (degrees) 1 +nslS:(  
TSTY   1            -0.20000000     0.42678383    -0.11724851     0.20000000     0.42678383    -0.11724851 aw:0R=S,>  
Change in Focus                :       0.000000                            0.000000 $/(H%f&  
Decenter X tolerance on surface 2 Qmh*Gh?v  
TSDX   2            -0.20000000     0.51705427    -0.02697807     0.20000000     0.51705427    -0.02697807 KPA5 X]  
Change in Focus                :       0.000000                            0.000000 YB}_zuZ4&  
Decenter Y tolerance on surface 2 S.OGLLprp  
TSDY   2            -0.20000000     0.51705427    -0.02697807     0.20000000     0.51705427    -0.02697807 way-Q7  
Change in Focus                :       0.000000                            0.000000 1P\_3.V{  
Tilt X tolerance on surface (degrees) 2 DDhc^(  
TSTX   2            -0.20000000     0.35349910    -0.19053324     0.20000000     0.35349910    -0.19053324 {#y HL  
Change in Focus                :       0.000000                            0.000000 !f\6=Z?>3  
Tilt Y tolerance on surface (degrees) 2 3,B[%!3d  
TSTY   2            -0.20000000     0.35349910    -0.19053324     0.20000000     0.35349910    -0.19053324
i=<(fq  
Change in Focus                :       0.000000                            0.000000 T't^pO-`  
Decenter X tolerance on surface 3 :PaFC{O)*  
TSDX   3            -0.20000000     0.53419039    -0.00984195     0.20000000     0.53419039    -0.00984195 P5P<-T{-c  
Change in Focus                :       0.000000                            0.000000 jWW2&cBm\  
Decenter Y tolerance on surface 3 0,;FiOp  
TSDY   3            -0.20000000     0.53419039    -0.00984195     0.20000000     0.53419039    -0.00984195 HnqZ7%jeN  
Change in Focus                :       0.000000                            0.000000 kB]|4CG{
 
Tilt X tolerance on surface (degrees) 3
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TSTX   3            -0.20000000     0.42861670    -0.11541563     0.20000000     0.42861670    -0.11541563 n{Mj<\kL  
Change in Focus                :       0.000000                            0.000000 )V}u1C-N  
Tilt Y tolerance on surface (degrees) 3 vP'R7r2Yx  
TSTY   3            -0.20000000     0.42861670    -0.11541563     0.20000000     0.42861670    -0.11541563 E%-&!%_>D@  
Change in Focus                :       0.000000                            0.000000 z[ ;{p.W  
Irregularity of surface 1 in fringes {ersXQ
:  
TIRR   1            -0.20000000     0.50973587    -0.03429647     0.20000000     0.57333868     0.02930634 ZdHWSfO)O  
Change in Focus                :       0.000000                            0.000000 {_/6,22j(V  
Irregularity of surface 2 in fringes cY>;(x@  
TIRR   2            -0.20000000     0.53400904    -0.01002330     0.20000000     0.55360281     0.00957047 O'-lBf+<  
Change in Focus                :       0.000000                            0.000000 <STjB,_s  
Irregularity of surface 3 in fringes m|"MJP  
TIRR   3            -0.20000000     0.58078982     0.03675748     0.20000000     0.49904394    -0.04498840 knBT(x'+  
Change in Focus                :       0.000000                            0.000000 Z9aDE@A  
Index tolerance on surface 1 >)pwmIn<  
TIND   1            -0.00100000     0.52606778    -0.01796456     0.00100000     0.56121811     0.01718578 6]g
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Change in Focus                :       0.000000                            0.000000 a4: PufS  
Index tolerance on surface 2 ESASsRzk  
TIND   2            -0.00100000     0.55639086     0.01235852     0.00100000     0.53126361    -0.01276872 -RH ?FJ  
Change in Focus                :       0.000000                           -0.000000 a3lo;Cfp  
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Worst offenders: 3nK'yC  
Type                      Value      Criterion        Change >uJrq""+  
TSTY   2            -0.20000000     0.35349910    -0.19053324 "3j0)  
TSTY   2             0.20000000     0.35349910    -0.19053324 up2%QbN(  
TSTX   2            -0.20000000     0.35349910    -0.19053324 iKS9Xss8  
TSTX   2             0.20000000     0.35349910    -0.19053324 U0N[~yW(t1  
TSTY   1            -0.20000000     0.42678383    -0.11724851 %r!#  
TSTY   1             0.20000000     0.42678383    -0.11724851 H_8
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TSTX   1            -0.20000000     0.42678383    -0.11724851 "|Q&  
TSTX   1             0.20000000     0.42678383    -0.11724851 ln=zGX.e  
TSTY   3            -0.20000000     0.42861670    -0.11541563 *,-YWx4
 
TSTY   3             0.20000000     0.42861670    -0.11541563 w pCS]2  
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Estimated Performance Changes based upon Root-Sum-Square method: 329xo03-[  
Nominal MTF                 :     0.54403234 m#;:%.Rm  
Estimated change            :    -0.36299231 @e0Q+
t  
Estimated MTF               :     0.18104003 *,
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Compensator Statistics: CWN=6(y  
Change in back focus: w\2[dd  
Minimum            :        -0.000000 Om1z  
Maximum            :         0.000000 7e
=a D~f  
Mean               :        -0.000000 wFd*6%  
Standard Deviation :         0.000000 W>Rv  

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Monte Carlo Analysis: <m6I)}K  
Number of trials: 20 <?J7Z|  
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Initial Statistics: Normal Distribution ntkinbbD  
``E;!r="v  
  Trial       Criterion        Change YJ6vyG>%C  
      1     0.42804416    -0.11598818 p.}[!!m P  
Change in Focus                :      -0.400171 X%F9.<4  
      2     0.54384387    -0.00018847 n[WeN NU  
Change in Focus                :       1.018470 q,(&2./  
      3     0.44510003    -0.09893230 0,A?*CO  
Change in Focus                :      -0.601922 bn(Scl#
@K  
      4     0.18154684    -0.36248550 Sd\@Q% }o\  
Change in Focus                :       0.920681 0$_imjZ  
      5     0.28665820    -0.25737414 Q:MsD.  
Change in Focus                :       1.253875 
}-Ma~/  
      6     0.21263372    -0.33139862 aKUr":z  
Change in Focus                :      -0.903878 /&|pXBY$;  
      7     0.40051424    -0.14351809 -*Pt78
1  
Change in Focus                :      -1.354815 1*jL2P]D  
      8     0.48754161    -0.05649072 
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Change in Focus                :       0.215922 i|O7nB@  
      9     0.40357468    -0.14045766 B*AMo5  
Change in Focus                :       0.281783 w:LCm `d  
     10     0.26315315    -0.28087919 .5ycO  
Change in Focus                :      -1.048393 [O)Zof  
     11     0.26120585    -0.28282649 2Ee1mbZVw8  
Change in Focus                :       1.017611 $P@cS1sB  
     12     0.24033815    -0.30369419 xq)/QR  
Change in Focus                :      -0.109292 ,Ex\\p-  
     13     0.37164046    -0.17239188 ^MW%&&,BL  
Change in Focus                :      -0.692430 Jqj6L993e  
     14     0.48597489    -0.05805744 ? 7EVmF  
Change in Focus                :      -0.662040 B<&_lG0sS  
     15     0.21462327    -0.32940907 3,5wWT] )  
Change in Focus                :       1.611296 .:raeDrd  
     16     0.43378226    -0.11025008 -:>#w`H  
Change in Focus                :      -0.640081 vWovR
`  
     17     0.39321881    -0.15081353 O
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Change in Focus                :       0.914906 [Z+,)-ke  
     18     0.20692530    -0.33710703 n6Zx0ad?  
Change in Focus                :       0.801607 4~Pto f@  
     19     0.51374068    -0.03029165
A(p  
Change in Focus                :       0.947293 1c"m$)a4  
     20     0.38013374    -0.16389860 (R<4"QbE  
Change in Focus                :       0.667010 eM"mP&TTL  
pi}H.iF  
Number of traceable Monte Carlo files generated: 20 1Qu,]i`  
UhTr<(@  
Nominal     0.54403234 `6$b1qv,  
Best        0.54384387    Trial     2 7qz-RF#s8  
Worst       0.18154684    Trial     4 P0(~~z&%[  
Mean        0.35770970 xi\RUAW  
Std Dev     0.11156454 }gi'%e  
hNo>)$v!s  
EI.Pk>ZIm  
Compensator Statistics: ^ks^9*'|j  
Change in back focus: an`(?6d  
Minimum            :        -1.354815 1n(}Q1fa  
Maximum            :         1.611296 #jx?uS  
Mean               :         0.161872 DOIWhd5:  
Standard Deviation :         0.869664 Lp)
8SmN  
y;Ln ao7i  
90% >       0.20977951               XL=R]IC<.  
80% >       0.22748071               ;Hb[gvl  
50% >       0.38667627               U3K<@r  
20% >       0.46553746               L)'rM-nkFh  
10% >       0.50064115                mVAm^JK  
3a}`xCO5  
End of Run. 3F}KrG  
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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 "4hpU]4j  

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 ~+ wamX3  
6CmFmc,  
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                 0yC`9g)(  
80% >       0.22748071                 *Z]WaDw  
50% >       0.38667627                 #H6g&)Z_  
20% >       0.46553746                 {ogZT7w}  
10% >       0.50064115 %L13Jsw  
CTkN8{2S  
最后这个数值是MTF值呢，还是MTF的公差？ {rvbo1t  
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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？？？   -yAnn  
CFJjh^ ~=  
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  : J%\
- 1  
90% >       0.20977951                 3I"NI.>*  
80% >       0.22748071                 zJ;>.0  
50% >       0.38667627                 1yBt/
U2  
20% >       0.46553746                 SOp=~

z  
10% >       0.50064115 ~H^'al2PK  
....... *;hY.EuoFz  

8K0X[-hs8  
D<U 9m3  
这些数值都是MTF值

Criterion           : Geometric MTF average S&T at 30.0000 cycles per mm   [o2w1R\H+x  
Mode                : Sensitivities d2rL 8jW  
Sampling            : 2 TUh&d5a9H  
Nominal Criterion   : 0.54403234 DY9fF4[9a  
Test Wavelength     : 0.6328 d0(Cn}m"c  
 fb\DiKsW  
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？ |6E .M1  
CRFCqmevR  
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