[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 j\[dx^\=  
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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 k_L7 kvpt  
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图片:2.jpg

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然后运行分析的结果如下： . oF &Ff/[  
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Analysis of Tolerances %~O,zs.2p  
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File : E:\光学设计资料\zemax练习\f500.ZMX 9Z@hPX3.  
Title: :;RMo2Tl  
Date : TUE JUN 21 2011 @
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?hZAxR\  
Units are Millimeters. 4M=]wR;  
All changes are computed using linear differences. Avge eJi  
)!th7sH  
Paraxial Focus compensation only. |{z:IQLv  
p,EQ#Ik  
WARNING: Solves should be removed prior to tolerancing. 4qb/daE:Z  
8l>?Pv  
Mnemonics: h"[AOfTE$  
TFRN: Tolerance on curvature in fringes. zq3\}9  
TTHI: Tolerance on thickness. )nC]5MXU  
TSDX: Tolerance on surface decentering in x. A9KET$i@v  
TSDY: Tolerance on surface decentering in y. yJ[0WY8<kC  
TSTX: Tolerance on surface tilt in x (degrees). A]_7}<<N  
TSTY: Tolerance on surface tilt in y (degrees). 2 ~dE<}  
TIRR: Tolerance on irregularity (fringes). 70yFaW  
TIND: Tolerance on Nd index of refraction. >2Y=*K,:  
TEDX: Tolerance on element decentering in x. gldAP:  
TEDY: Tolerance on element decentering in y. +C^nO=[E  
TETX: Tolerance on element tilt in x (degrees). Z\(q@3C  
TETY: Tolerance on element tilt in y (degrees). YU'k#\gi*  
vz@A;t  
WARNING: RAY AIMING IS OFF. Very loose tolerances may not be computed accurately. <v"R.<  
frm>4)9+  
WARNING: Boundary constraints on compensators will be ignored. J@/kIrx  
$H2u.U<ip  
Criterion           : Geometric MTF average S&T at 30.0000 cycles per mm y B81f  
Mode                : Sensitivities /`Ug9,*  
Sampling            : 2 %HhBt5w  
Nominal Criterion   : 0.54403234 sbfuzpg]*  
Test Wavelength     : 0.6328 s-NX 
o  
>1X|^  
<X#C)-.  
Fields: XY Symmetric Angle in degrees 9sM!`Lz{  
#      X-Field      Y-Field       Weight    VDX    VDY    VCX    VCY .y'>[  
1   0.000E+000   0.000E+000   1.000E+000  0.000  0.000  0.000  0.000 dUD[e,?  
4V"E8rUL(  
Sensitivity Analysis: ob!P;]T  
xf'V{9*  
                 |----------------- Minimum ----------------| |----------------- Maximum ----------------| ]E{NNHK%2N  
Type                      Value      Criterion        Change          Value      Criterion        Change m=1N>cq '  
Fringe tolerance on surface 1 nd`1m[7MNu  
TFRN   1            -1.00000000     0.54257256    -0.00145977     1.00000000     0.54548607     0.00145374 4XL^D~V  
Change in Focus                :      -0.000000                            0.000000 OMky$d#  
Fringe tolerance on surface 2 HRpte=`q  
TFRN   2            -1.00000000     0.54177471    -0.00225762     1.00000000     0.54627463     0.00224230 9V a}I
-  
Change in Focus                :       0.000000                            0.000000 [XN={  
Fringe tolerance on surface 3 1wii8B6  
TFRN   3            -1.00000000     0.54779866     0.00376632     1.00000000     0.54022572    -0.00380662 9v#CE!  
Change in Focus                :      -0.000000                            0.000000 Mg+2. 8%  
Thickness tolerance on surface 1 t"sBPLU\  
TTHI   1   3        -0.20000000     0.54321462    -0.00081772     0.20000000     0.54484759     0.00081525 Q1lyj7c#x  
Change in Focus                :       0.000000                            0.000000 M^A48u{,"  
Thickness tolerance on surface 2  X hR4ru`  
TTHI   2   3        -0.20000000     0.54478712     0.00075478     0.20000000     0.54327558    -0.00075675 TbMW|0 #w  
Change in Focus                :       0.000000                           -0.000000 9FF0%*tGo  
Decenter X tolerance on surfaces 1 through 3 "BAK !N$9  
TEDX   1   3        -0.20000000     0.54401464   -1.7700E-005     0.20000000     0.54401464   -1.7700E-005 *nd!)t  
Change in Focus                :       0.000000                            0.000000 v<k?Vu  
Decenter Y tolerance on surfaces 1 through 3 T%+#xl  
TEDY   1   3        -0.20000000     0.54401464   -1.7700E-005     0.20000000     0.54401464   -1.7700E-005 t <~h'U  
Change in Focus                :       0.000000                            0.000000 -$\y_?}  
Tilt X tolerance on surfaces 1 through 3 (degrees) k``_EiV4t  
TETX   1   3        -0.20000000     0.54897548     0.00494314     0.20000000     0.54897548     0.00494314 2y75  
Change in Focus                :       0.000000                            0.000000 3s*mbk[J  
Tilt Y tolerance on surfaces 1 through 3 (degrees) UB@Rs|)  
TETY   1   3        -0.20000000     0.54897548     0.00494314     0.20000000     0.54897548     0.00494314 YH$-g  
Change in Focus                :       0.000000                            0.000000 ]IaMp78
8  
Decenter X tolerance on surface 1 K&u_R  
TSDX   1            -0.20000000     0.53999563    -0.00403671     0.20000000     0.53999563    -0.00403671 $+Z[K.2J  
Change in Focus                :       0.000000                            0.000000 @b\$yB@z  
Decenter Y tolerance on surface 1 MyOd,vU
 
TSDY   1            -0.20000000     0.53999563    -0.00403671     0.20000000     0.53999563    -0.00403671 ~Za
Y!(R<  
Change in Focus                :       0.000000                            0.000000 VCYwzB  
Tilt X tolerance on surface (degrees) 1 :x3QRF  
TSTX   1            -0.20000000     0.42678383    -0.11724851     0.20000000     0.42678383    -0.11724851 cs48*+m  
Change in Focus                :       0.000000                            0.000000 "> ypIR<  
Tilt Y tolerance on surface (degrees) 1 g_E$=j92v  
TSTY   1            -0.20000000     0.42678383    -0.11724851     0.20000000     0.42678383    -0.11724851 %64)(z  
Change in Focus                :       0.000000                            0.000000 TT%M'5&  
Decenter X tolerance on surface 2 e v}S+!|U  
TSDX   2            -0.20000000     0.51705427    -0.02697807     0.20000000     0.51705427    -0.02697807 'B$
yo]  
Change in Focus                :       0.000000                            0.000000 |*Yr<zt  
Decenter Y tolerance on surface 2 A.F%Ycq  
TSDY   2            -0.20000000     0.51705427    -0.02697807     0.20000000     0.51705427    -0.02697807 7jrt7[{
 
Change in Focus                :       0.000000                            0.000000 l03B=$  
Tilt X tolerance on surface (degrees) 2 3=#<X-);  
TSTX   2            -0.20000000     0.35349910    -0.19053324     0.20000000     0.35349910    -0.19053324 |o"?gB}Dh  
Change in Focus                :       0.000000                            0.000000 goNG' o %|  
Tilt Y tolerance on surface (degrees) 2 q~Hn-5H4Q  
TSTY   2            -0.20000000     0.35349910    -0.19053324     0.20000000     0.35349910    -0.19053324 4IK(7  
Change in Focus                :       0.000000                            0.000000 O;Rqv  
Decenter X tolerance on surface 3 E*&vy  
TSDX   3            -0.20000000     0.53419039    -0.00984195     0.20000000     0.53419039    -0.00984195 ;7*[Bcj.  
Change in Focus                :       0.000000                            0.000000 - nm"of\o  
Decenter Y tolerance on surface 3 uo:J\E  
TSDY   3            -0.20000000     0.53419039    -0.00984195     0.20000000     0.53419039    -0.00984195 >-?f0K  
Change in Focus                :       0.000000                            0.000000 1y&\5kB  
Tilt X tolerance on surface (degrees) 3 D_2:k'4  
TSTX   3            -0.20000000     0.42861670    -0.11541563     0.20000000     0.42861670    -0.11541563 L<c4kw  
Change in Focus                :       0.000000                            0.000000 >tS'Q`R
 
Tilt Y tolerance on surface (degrees) 3 |T /ZL!  
TSTY   3            -0.20000000     0.42861670    -0.11541563     0.20000000     0.42861670    -0.11541563 r wL`Czs  
Change in Focus                :       0.000000                            0.000000 'ycJMYP8  
Irregularity of surface 1 in fringes b)#hSjWO#  
TIRR   1            -0.20000000     0.50973587    -0.03429647     0.20000000     0.57333868     0.02930634 sfH_5 #w  
Change in Focus                :       0.000000                            0.000000 W.jGGt\<\  
Irregularity of surface 2 in fringes \
<h0Q,e  
TIRR   2            -0.20000000     0.53400904    -0.01002330     0.20000000     0.55360281     0.00957047 $QF{iV@6d4  
Change in Focus                :       0.000000                            0.000000 <\y@*fg+  
Irregularity of surface 3 in fringes y
qs4[C  
TIRR   3            -0.20000000     0.58078982     0.03675748     0.20000000     0.49904394    -0.04498840 u]wZQl#-  
Change in Focus                :       0.000000                            0.000000 ~%F9%=  
Index tolerance on surface 1 =[ 46`-_  
TIND   1            -0.00100000     0.52606778    -0.01796456     0.00100000     0.56121811     0.01718578 hF?1y`20  
Change in Focus                :       0.000000                            0.000000 KM0ru  
Index tolerance on surface 2 ;LfXi 8)  
TIND   2            -0.00100000     0.55639086     0.01235852     0.00100000     0.53126361    -0.01276872 OdbEq?3S/?  
Change in Focus                :       0.000000                           -0.000000 ~Gp[_ %K  
RU{twL.B  
Worst offenders: $p8xEcQdU#  
Type                      Value      Criterion        Change ;a!S!%.h  
TSTY   2            -0.20000000     0.35349910    -0.19053324 e ,'_xV  
TSTY   2             0.20000000     0.35349910    -0.19053324 G5_=H,Vmd  
TSTX   2            -0.20000000     0.35349910    -0.19053324 @s>Czm5  
TSTX   2             0.20000000     0.35349910    -0.19053324 ;>hO+Wo  
TSTY   1            -0.20000000     0.42678383    -0.11724851 ldcqe$7,  
TSTY   1             0.20000000     0.42678383    -0.11724851 G>_*djUf  
TSTX   1            -0.20000000     0.42678383    -0.11724851 ^6
x%*/l|  
TSTX   1             0.20000000     0.42678383    -0.11724851 PQt")[
 
TSTY   3            -0.20000000     0.42861670    -0.11541563 u
Cvj!  
TSTY   3             0.20000000     0.42861670    -0.11541563 GKqm&/M*=  
KkyVSoD\  
Estimated Performance Changes based upon Root-Sum-Square method: + J{IRyBc  
Nominal MTF                 :     0.54403234 +480 l}  
Estimated change            :    -0.36299231 @IKYh{j4  
Estimated MTF               :     0.18104003 \sixI;-2  
P:S.~Jq  
Compensator Statistics: 6- YU[HF  
Change in back focus: YqD=>P[O  
Minimum            :        -0.000000 2W(s(-hD  
Maximum            :         0.000000 _ye |Y  
Mean               :        -0.000000 /62!cp/F/D  
Standard Deviation :         0.000000 w"F 9l  
5I;&mW`1,`  
Monte Carlo Analysis: j;G
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Number of trials: 20 539>WyG5  
]
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Initial Statistics: Normal Distribution -IudgO]  
<}Vrl`?h  
  Trial       Criterion        Change nPtuTySG  
      1     0.42804416    -0.11598818 **0~K";\  
Change in Focus                :      -0.400171 Wi<m{.%\E  
      2     0.54384387    -0.00018847 {?0lBfB"  
Change in Focus                :       1.018470 9RL`<,Q  
      3     0.44510003    -0.09893230 CW K7wZM  
Change in Focus                :      -0.601922 {z|)Njhg  
      4     0.18154684    -0.36248550 a!SiX  
Change in Focus                :       0.920681 <=&`ZH  
      5     0.28665820    -0.25737414 dQX6(Jj  
Change in Focus                :       1.253875 0> E r=,e  
      6     0.21263372    -0.33139862
2'Uu:Y^  
Change in Focus                :      -0.903878 U>SShpmZA  
      7     0.40051424    -0.14351809 S+6.ZZ9
c  
Change in Focus                :      -1.354815 Q\vpqE!9  
      8     0.48754161    -0.05649072 :,7hWs
 
Change in Focus                :       0.215922 Zl!kJ:0  
      9     0.40357468    -0.14045766 'oVx#w^mf  
Change in Focus                :       0.281783 hE/cd1iJ$  
     10     0.26315315    -0.28087919 v/plpNVp>  
Change in Focus                :      -1.048393 >|=ts  
     11     0.26120585    -0.28282649 UDFDJm$  
Change in Focus                :       1.017611 $wa{~'  
     12     0.24033815    -0.30369419 hZ,_6mNg  
Change in Focus                :      -0.109292 ]N]!o#q}L  
     13     0.37164046    -0.17239188 C.P*#_R  
Change in Focus                :      -0.692430 QIEJ6`  
     14     0.48597489    -0.05805744 Y|qTyE%  
Change in Focus                :      -0.662040 DCa^ u'f  
     15     0.21462327    -0.32940907 Nx;~@  
Change in Focus                :       1.611296 IPpN@  
     16     0.43378226    -0.11025008 {Xy5pfW Q  
Change in Focus                :      -0.640081 M3y NAN  
     17     0.39321881    -0.15081353 372rbY  
Change in Focus                :       0.914906 N~gzDQ3  
     18     0.20692530    -0.33710703 v1JzP#  
Change in Focus                :       0.801607 t?gic9 q  
     19     0.51374068    -0.03029165 r5/0u(\LB  
Change in Focus                :       0.947293 s8Q 5ui]  
     20     0.38013374    -0.16389860 re<{ >  
Change in Focus                :       0.667010 2,F.$X  
 F(n$  
Number of traceable Monte Carlo files generated: 20 P+sW[:  
I{2hfKUe`  
Nominal     0.54403234 C) s5D  
Best        0.54384387    Trial     2 n@i HFBb  
Worst       0.18154684    Trial     4 uW{l(}0N  
Mean        0.35770970 B$K=\6o  
Std Dev     0.11156454 Or+U@vAnk  
bJ%h53  
w9imKVry  
Compensator Statistics: +\A,&;!SR  
Change in back focus: :Yl-w-oe  
Minimum            :        -1.354815 V!=,0zy~Z  
Maximum            :         1.611296 3"i-o$P  
Mean               :         0.161872 *fxG?}YT  
Standard Deviation :         0.869664 J@'wf8Ub  
ITBE|b  
90% >       0.20977951               e T{ 4{  
80% >       0.22748071               'H!Uh]!  
50% >       0.38667627               m0SlOgRsk  
20% >       0.46553746               reWot&;  
10% >       0.50064115                X_h}J=33Q  
%> eiAB_b  
End of Run. 8<.Oq4ku  
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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 y%T_pTcU  

图片:3.JPG

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w@E3ZL^  
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 eMsd37J  
HV|,}Wks6s  
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                 W=?<<dVYD  
80% >       0.22748071                 Bzf^ivT3L  
50% >       0.38667627                 [/r(__.  
20% >       0.46553746                 {Sh ;(.u^  
10% >       0.50064115 Pm7}"D'/  
E1 2uZ$X  
最后这个数值是MTF值呢，还是MTF的公差？ 9(Xn>G'iT  
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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？？？   >t+P(*u  
p_4<6{KEt  
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  : 2 E=L8<  
90% >       0.20977951                 ~J]qP#C  
80% >       0.22748071                 i/.6>4tE:  
50% >       0.38667627                 '%;m?t%q  
20% >       0.46553746                 naNghGQ  
10% >       0.50064115 HOi`$vX}N  
....... gM]:Ma  

!x)R=Z/C  
$~kA B8z  
这些数值都是MTF值

Criterion           : Geometric MTF average S&T at 30.0000 cycles per mm   ykJ>*z  
Mode                : Sensitivities |[lKY+26:{  
Sampling            : 2 (?];VG  
Nominal Criterion   : 0.54403234 y>L
Bl]  
Test Wavelength     : 0.6328 =|9!vzG4  
&3&HY:yF  
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？ ('~LMu_  
D'4\*4is  
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