[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 U\_-GS;1  
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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 S\qYw(G  
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图片:2.jpg

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然后运行分析的结果如下： B&tU~  
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Analysis of Tolerances t-xw=&!w  
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File : E:\光学设计资料\zemax练习\f500.ZMX WVP^C71  
Title: ^,Paih 2  
Date : TUE JUN 21 2011 ?A[q/n:K  
t+R8{9L-  
Units are Millimeters. Ol}^'7H  
All changes are computed using linear differences. uP'x{Pr)  
zi^T?<t  
Paraxial Focus compensation only. t)yWQV  
L_>j SP  
WARNING: Solves should be removed prior to tolerancing. sknta0^=2  
^

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Mnemonics: XJ3 5Z+M  
TFRN: Tolerance on curvature in fringes. rtl|zCst  
TTHI: Tolerance on thickness. YS}uJ&WoF  
TSDX: Tolerance on surface decentering in x. 4t(V)1+  
TSDY: Tolerance on surface decentering in y. ls(lL\  
TSTX: Tolerance on surface tilt in x (degrees). NH?q/4=I0W  
TSTY: Tolerance on surface tilt in y (degrees). DPrFBy  
TIRR: Tolerance on irregularity (fringes). cU,]^/0Y  
TIND: Tolerance on Nd index of refraction. 3NEbCILF  
TEDX: Tolerance on element decentering in x. vgfLI}|5  
TEDY: Tolerance on element decentering in y. tgu}^TfKkg  
TETX: Tolerance on element tilt in x (degrees). kIHfLwh9N  
TETY: Tolerance on element tilt in y (degrees). qOyg&]7  
{x3"/sF  
WARNING: RAY AIMING IS OFF. Very loose tolerances may not be computed accurately. DEGEr-  
67Z.aaXD1  
WARNING: Boundary constraints on compensators will be ignored. QLq^[>n  
Et\z^y
  
Criterion           : Geometric MTF average S&T at 30.0000 cycles per mm Ig&=(Kmr  
Mode                : Sensitivities Q4gsOxP  
Sampling            : 2 hOI|#(
-  
Nominal Criterion   : 0.54403234 &ukYTDM  
Test Wavelength     : 0.6328 H /E.R[\+x  
L-7?:  
=.
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Fields: XY Symmetric Angle in degrees ogt<vng  
#      X-Field      Y-Field       Weight    VDX    VDY    VCX    VCY eOZ0L1JM!  
1   0.000E+000   0.000E+000   1.000E+000  0.000  0.000  0.000  0.000 /cPezX  
xWY%-CWY.  
Sensitivity Analysis: ;\N{z6  
\tLfB[S.5  
                 |----------------- Minimum ----------------| |----------------- Maximum ----------------| YT)jBS~&  
Type                      Value      Criterion        Change          Value      Criterion        Change 5*.JXxE;U  
Fringe tolerance on surface 1 DKd:tL24&  
TFRN   1            -1.00000000     0.54257256    -0.00145977     1.00000000     0.54548607     0.00145374 (Rqn)<<2  
Change in Focus                :      -0.000000                            0.000000 ar-N4+!@  
Fringe tolerance on surface 2 ?Y:>Ouv*z'  
TFRN   2            -1.00000000     0.54177471    -0.00225762     1.00000000     0.54627463     0.00224230 d ] J5c  
Change in Focus                :       0.000000                            0.000000 ZK=`Y@  
Fringe tolerance on surface 3 k"*A@  
TFRN   3            -1.00000000     0.54779866     0.00376632     1.00000000     0.54022572    -0.00380662 ac8+?FpK #  
Change in Focus                :      -0.000000                            0.000000 d!+
8  
Thickness tolerance on surface 1 OH2Xxr[bQ  
TTHI   1   3        -0.20000000     0.54321462    -0.00081772     0.20000000     0.54484759     0.00081525 3$fzqFo  
Change in Focus                :       0.000000                            0.000000 ?0%yDq1_  
Thickness tolerance on surface 2 FLT4:B7  
TTHI   2   3        -0.20000000     0.54478712     0.00075478     0.20000000     0.54327558    -0.00075675 o!q3+Pp;}  
Change in Focus                :       0.000000                           -0.000000 Pr |u_^  
Decenter X tolerance on surfaces 1 through 3 -;/;dz;  
TEDX   1   3        -0.20000000     0.54401464   -1.7700E-005     0.20000000     0.54401464   -1.7700E-005 ),9^hJ1+@  
Change in Focus                :       0.000000                            0.000000 7Y`/w$  
Decenter Y tolerance on surfaces 1 through 3 2!Bjs?K<bv  
TEDY   1   3        -0.20000000     0.54401464   -1.7700E-005     0.20000000     0.54401464   -1.7700E-005 fi5x0El  
Change in Focus                :       0.000000                            0.000000 D%L}vugxK  
Tilt X tolerance on surfaces 1 through 3 (degrees) ('H[[YODh  
TETX   1   3        -0.20000000     0.54897548     0.00494314     0.20000000     0.54897548     0.00494314 7 &y'\  
Change in Focus                :       0.000000                            0.000000 B d#D*
"gx  
Tilt Y tolerance on surfaces 1 through 3 (degrees) vrr&Ve  
TETY   1   3        -0.20000000     0.54897548     0.00494314     0.20000000     0.54897548     0.00494314 "bI'XaSv  
Change in Focus                :       0.000000                            0.000000 >
/,7j:X  
Decenter X tolerance on surface 1 z8HOig?  
TSDX   1            -0.20000000     0.53999563    -0.00403671     0.20000000     0.53999563    -0.00403671 zGtWyXP  
Change in Focus                :       0.000000                            0.000000 dso6ZRx  
Decenter Y tolerance on surface 1 .M3]\I u  
TSDY   1            -0.20000000     0.53999563    -0.00403671     0.20000000     0.53999563    -0.00403671 c&!EsMsU  
Change in Focus                :       0.000000                            0.000000 8ZYF%  
Tilt X tolerance on surface (degrees) 1
2=P.$Kx  
TSTX   1            -0.20000000     0.42678383    -0.11724851     0.20000000     0.42678383    -0.11724851 tOn 6  
Change in Focus                :       0.000000                            0.000000 o:`>r/SlL  
Tilt Y tolerance on surface (degrees) 1 }.j<kmd  
TSTY   1            -0.20000000     0.42678383    -0.11724851     0.20000000     0.42678383    -0.11724851 TqzL]'NS+  
Change in Focus                :       0.000000                            0.000000 S8+G
M  
Decenter X tolerance on surface 2 <g/Z(<{wor  
TSDX   2            -0.20000000     0.51705427    -0.02697807     0.20000000     0.51705427    -0.02697807 yV;_]_EO  
Change in Focus                :       0.000000                            0.000000 IM""s]  
Decenter Y tolerance on surface 2 *G'R+_tdE  
TSDY   2            -0.20000000     0.51705427    -0.02697807     0.20000000     0.51705427    -0.02697807 ={HYwP;  
Change in Focus                :       0.000000                            0.000000 ZbmBwW_ 7  
Tilt X tolerance on surface (degrees) 2 >ZAb9=/M)F  
TSTX   2            -0.20000000     0.35349910    -0.19053324     0.20000000     0.35349910    -0.19053324 : ,0F_["3  
Change in Focus                :       0.000000                            0.000000 *fz]Q>2ga  
Tilt Y tolerance on surface (degrees) 2 z?ck*9SZX  
TSTY   2            -0.20000000     0.35349910    -0.19053324     0.20000000     0.35349910    -0.19053324 AoL2Wrk]\B  
Change in Focus                :       0.000000                            0.000000 dj>ZHdTn  
Decenter X tolerance on surface 3 /Y NV  
TSDX   3            -0.20000000     0.53419039    -0.00984195     0.20000000     0.53419039    -0.00984195 ="~yD[S  
Change in Focus                :       0.000000                            0.000000 p6UPP|-S  
Decenter Y tolerance on surface 3 %}T' 3  
TSDY   3            -0.20000000     0.53419039    -0.00984195     0.20000000     0.53419039    -0.00984195 "x;|li3;  
Change in Focus                :       0.000000                            0.000000 BU3VXnqT[  
Tilt X tolerance on surface (degrees) 3 :Z
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TSTX   3            -0.20000000     0.42861670    -0.11541563     0.20000000     0.42861670    -0.11541563 ^0 zWiX  
Change in Focus                :       0.000000                            0.000000 c34s(>AC  
Tilt Y tolerance on surface (degrees) 3 {KH
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TSTY   3            -0.20000000     0.42861670    -0.11541563     0.20000000     0.42861670    -0.11541563 dfo
_R  
Change in Focus                :       0.000000                            0.000000 Me*woCos'  
Irregularity of surface 1 in fringes jv8diQ.  
TIRR   1            -0.20000000     0.50973587    -0.03429647     0.20000000     0.57333868     0.02930634 /UwB6s(  
Change in Focus                :       0.000000                            0.000000 l1<]pdLTR  
Irregularity of surface 2 in fringes \FE  
TIRR   2            -0.20000000     0.53400904    -0.01002330     0.20000000     0.55360281     0.00957047 #Uc0W  
Change in Focus                :       0.000000                            0.000000 #3fS_;G  
Irregularity of surface 3 in fringes w6b
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TIRR   3            -0.20000000     0.58078982     0.03675748     0.20000000     0.49904394    -0.04498840 #*J+4aw3  
Change in Focus                :       0.000000                            0.000000 `5J`<BPs  
Index tolerance on surface 1 u 2)#Ml  
TIND   1            -0.00100000     0.52606778    -0.01796456     0.00100000     0.56121811     0.01718578 OI@;ffHSW  
Change in Focus                :       0.000000                            0.000000 `>kHJI4  
Index tolerance on surface 2 #2dd`F8  
TIND   2            -0.00100000     0.55639086     0.01235852     0.00100000     0.53126361    -0.01276872 Ptj,9bf<\  
Change in Focus                :       0.000000                           -0.000000 Ub>Pl,~'  
zO@7V>2  
Worst offenders: 
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Type                      Value      Criterion        Change cJIA/HQe  
TSTY   2            -0.20000000     0.35349910    -0.19053324 d9@Pze">e  
TSTY   2             0.20000000     0.35349910    -0.19053324 >~+'V.CNW  
TSTX   2            -0.20000000     0.35349910    -0.19053324 G7|CwzMg  
TSTX   2             0.20000000     0.35349910    -0.19053324 Mk:k0,z  
TSTY   1            -0.20000000     0.42678383    -0.11724851 >q+q];=(  
TSTY   1             0.20000000     0.42678383    -0.11724851 ")gd)_FOS  
TSTX   1            -0.20000000     0.42678383    -0.11724851 n]K`ofjl^  
TSTX   1             0.20000000     0.42678383    -0.11724851 tTX@Bb8  
TSTY   3            -0.20000000     0.42861670    -0.11541563 JPsR7f  
TSTY   3             0.20000000     0.42861670    -0.11541563 D%WgE&wtM  
F9N/_H*+  
Estimated Performance Changes based upon Root-Sum-Square method: l(o;O.dLt  
Nominal MTF                 :     0.54403234 GnCO{"n  
Estimated change            :    -0.36299231 8!{;yz  
Estimated MTF               :     0.18104003 kdr?I9kwW  
!= @U~X|cu  
Compensator Statistics: |I0O|Zdv  
Change in back focus: :o2^?k8k&#  
Minimum            :        -0.000000 4E"OD+  
Maximum            :         0.000000 o?9k{  
Mean               :        -0.000000 *5Mg^}ZC5  
Standard Deviation :         0.000000 6Cdc?#&  
E~b Yk6  
Monte Carlo Analysis: Q')0 T>F-  
Number of trials: 20 $ts%SDM  
v/1&V+"^kd  
Initial Statistics: Normal Distribution K #f*LV5  
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  Trial       Criterion        Change BAJEn6f?  
      1     0.42804416    -0.11598818 }mhD2'E  
Change in Focus                :      -0.400171 BGe&c,feIc  
      2     0.54384387    -0.00018847 `S&$y4|Vs  
Change in Focus                :       1.018470 Za5bx,^  
      3     0.44510003    -0.09893230 CH`_4UAX%  
Change in Focus                :      -0.601922 xs'vd:l.Pp  
      4     0.18154684    -0.36248550 ^")SU(`  
Change in Focus                :       0.920681 j/C.='?%  
      5     0.28665820    -0.25737414 >$%rsc}^  
Change in Focus                :       1.253875 Msk^H7  
      6     0.21263372    -0.33139862 FHoY=fCI  
Change in Focus                :      -0.903878 Gtyy^tz[  
      7     0.40051424    -0.14351809 t%B ,ATW  
Change in Focus                :      -1.354815 c~bTK" u  
      8     0.48754161    -0.05649072 ec$kcD!  
Change in Focus                :       0.215922 8/tvS8I#y  
      9     0.40357468    -0.14045766 ,j'>}'wG)  
Change in Focus                :       0.281783 6)@Y41H]C  
     10     0.26315315    -0.28087919 G#|`Bjv"aP  
Change in Focus                :      -1.048393 I_h8)W  
     11     0.26120585    -0.28282649 Zy<gA >  
Change in Focus                :       1.017611 oD@~wcMIT0  
     12     0.24033815    -0.30369419 bPe|/wp  
Change in Focus                :      -0.109292 ^hMJNy&R  
     13     0.37164046    -0.17239188 pOe"S  
Change in Focus                :      -0.692430 mvCH$}w8&  
     14     0.48597489    -0.05805744 RKt#2%FFO  
Change in Focus                :      -0.662040  hxedQvW  
     15     0.21462327    -0.32940907 aYmC LLj  
Change in Focus                :       1.611296 pyf/%9R:d  
     16     0.43378226    -0.11025008 NI1jJfH|l  
Change in Focus                :      -0.640081 _a?(JzLw5  
     17     0.39321881    -0.15081353 7I_1Lnnf  
Change in Focus                :       0.914906 BS6UXAf{|Z  
     18     0.20692530    -0.33710703 @77%15_Jz  
Change in Focus                :       0.801607 Z0(}doh  
     19     0.51374068    -0.03029165 (B0tgg^jj,  
Change in Focus                :       0.947293 jMH=lQ+8  
     20     0.38013374    -0.16389860 E|Q|Nx!6[  
Change in Focus                :       0.667010 IwR/4LYI  
Zeeixg-1<  
Number of traceable Monte Carlo files generated: 20 -=+@/@nV  
Kc%GxD`  
Nominal     0.54403234 t3w:!'Ato  
Best        0.54384387    Trial     2 ~0^d-,ZD5  
Worst       0.18154684    Trial     4 v&8%t 7|  
Mean        0.35770970 5 wT e?  
Std Dev     0.11156454 Oh|KbM*vS  
TsvF~Gdp  
_>k&,p]y  
Compensator Statistics: g aq"+@fH  
Change in back focus: ^J[r<Dm8F  
Minimum            :        -1.354815 HZ+l){u  
Maximum            :         1.611296 Y[8GoqE|  
Mean               :         0.161872 6UXDIg=  
Standard Deviation :         0.869664 qkg`4'rLg  
@gn}J'  
90% >       0.20977951               _tJm0z!  
80% >       0.22748071               I|SQhbi  
50% >       0.38667627               _UqE -+&  
20% >       0.46553746               E76#xsyhF  
10% >       0.50064115                S 6|#9C&  
IGtpL[.;/  
End of Run. &`9p.  
DC5^k[m  
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 %+{[%?xh  

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 t.ci!#/d  
uE]kv  
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                 #j?SdQ  
80% >       0.22748071                 B'kV.3t  
50% >       0.38667627                 DJ
:N  
20% >       0.46553746                 %!vgAH4  
10% >       0.50064115 eM1=r:jgE  
F70_N($i  
最后这个数值是MTF值呢，还是MTF的公差？ z5k9|.hgw  
!VXs yH3r5  
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？？？   2l YA% n  
(=/%_jj  
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  : u40k9vh  
90% >       0.20977951                 x,3oa_'E  
80% >       0.22748071                 hny):59f  
50% >       0.38667627                 G3.MS7J  
20% >       0.46553746                 ` s}v6  
10% >       0.50064115 -A\J:2a|  
....... T&5dF9a  

@Qa)@'u  

YnCWmlC  
这些数值都是MTF值

Criterion           : Geometric MTF average S&T at 30.0000 cycles per mm   wF`9}9q  
Mode                : Sensitivities l*l(QvN_  
Sampling            : 2 f17pwJ~=  
Nominal Criterion   : 0.54403234 tvC7LLNP<  
Test Wavelength     : 0.6328 4eOQP  

mB:I8g7  
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？ U[S#axak  
?1I0VA']  
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