[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 I\J^@&
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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 p%A s6.  
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图片:2.jpg

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然后运行分析的结果如下： Z
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Analysis of Tolerances !#P|2>>u  
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File : E:\光学设计资料\zemax练习\f500.ZMX g_8Bhe"ik  
Title: ,{=pFs2  
Date : TUE JUN 21 2011 !.>TF

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Units are Millimeters. gaeMcL_^a  
All changes are computed using linear differences. xW92ZuzSH  
KG:CVIW Y  
Paraxial Focus compensation only. IK~'ke  
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WARNING: Solves should be removed prior to tolerancing. 
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Ubtu?wRBW  
Mnemonics: <)01]lKH  
TFRN: Tolerance on curvature in fringes. Bn>"lDf,  
TTHI: Tolerance on thickness. MVe:[=VOT|  
TSDX: Tolerance on surface decentering in x. w
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TSDY: Tolerance on surface decentering in y. &3a1(>(7F  
TSTX: Tolerance on surface tilt in x (degrees). d8l T+MS=  
TSTY: Tolerance on surface tilt in y (degrees). 9X<o8^V  
TIRR: Tolerance on irregularity (fringes). |8,|>EyqK  
TIND: Tolerance on Nd index of refraction. ,khB*h14;h  
TEDX: Tolerance on element decentering in x. fZM)>  
TEDY: Tolerance on element decentering in y. v
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TETX: Tolerance on element tilt in x (degrees). l)@Zuh  
TETY: Tolerance on element tilt in y (degrees). H(}Jt!/:  
?[~"$  
WARNING: RAY AIMING IS OFF. Very loose tolerances may not be computed accurately. !ho~@sc{W  
;+pS-Zb 6  
WARNING: Boundary constraints on compensators will be ignored. %"#%/>U4  
)tc"4lp-  
Criterion           : Geometric MTF average S&T at 30.0000 cycles per mm cWG>w6FI  
Mode                : Sensitivities e)
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Sampling            : 2 u~kfz*hz  
Nominal Criterion   : 0.54403234 or2BG&W  
Test Wavelength     : 0.6328 <G d?,}\  
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sfLH[Q?  
Fields: XY Symmetric Angle in degrees ~nul[>z  
#      X-Field      Y-Field       Weight    VDX    VDY    VCX    VCY .m',*s<CMQ  
1   0.000E+000   0.000E+000   1.000E+000  0.000  0.000  0.000  0.000 ssdp
wn'  
cT8b$P5w  
Sensitivity Analysis: \?n4d#=$o  
3I|&}+Z6  
                 |----------------- Minimum ----------------| |----------------- Maximum ----------------| tCkKJ)m  
Type                      Value      Criterion        Change          Value      Criterion        Change d=?Kk4Ag  
Fringe tolerance on surface 1 aD5jy  
TFRN   1            -1.00000000     0.54257256    -0.00145977     1.00000000     0.54548607     0.00145374 N =k}"2_=  
Change in Focus                :      -0.000000                            0.000000 <Q-Y$ ^\  
Fringe tolerance on surface 2 M\%LB}4M  
TFRN   2            -1.00000000     0.54177471    -0.00225762     1.00000000     0.54627463     0.00224230 =P* YwLb  
Change in Focus                :       0.000000                            0.000000 `S&(J2KV  
Fringe tolerance on surface 3 -c%K_2`  
TFRN   3            -1.00000000     0.54779866     0.00376632     1.00000000     0.54022572    -0.00380662 #w2;n@7;X  
Change in Focus                :      -0.000000                            0.000000 .#py5&`%  
Thickness tolerance on surface 1 4';~@IBf  
TTHI   1   3        -0.20000000     0.54321462    -0.00081772     0.20000000     0.54484759     0.00081525 kpxWi=y  
Change in Focus                :       0.000000                            0.000000 'o%IA)sF  
Thickness tolerance on surface 2 -,;r %7T  
TTHI   2   3        -0.20000000     0.54478712     0.00075478     0.20000000     0.54327558    -0.00075675 .f+ul@o  
Change in Focus                :       0.000000                           -0.000000 ?]JTrv"zp  
Decenter X tolerance on surfaces 1 through 3 v%mAU3M  
TEDX   1   3        -0.20000000     0.54401464   -1.7700E-005     0.20000000     0.54401464   -1.7700E-005 ]{tnNr>mv  
Change in Focus                :       0.000000                            0.000000 P!;%DI!<b  
Decenter Y tolerance on surfaces 1 through 3 %Se@8d8  
TEDY   1   3        -0.20000000     0.54401464   -1.7700E-005     0.20000000     0.54401464   -1.7700E-005 xG802?2i/;  
Change in Focus                :       0.000000                            0.000000 1M%'Xe7  
Tilt X tolerance on surfaces 1 through 3 (degrees) SONv]));  
TETX   1   3        -0.20000000     0.54897548     0.00494314     0.20000000     0.54897548     0.00494314 T]&% KQ  
Change in Focus                :       0.000000                            0.000000 Pfy2PpA  
Tilt Y tolerance on surfaces 1 through 3 (degrees) N>Dr z  
TETY   1   3        -0.20000000     0.54897548     0.00494314     0.20000000     0.54897548     0.00494314 bn
so+cA  
Change in Focus                :       0.000000                            0.000000 }sbh|#  
Decenter X tolerance on surface 1 Idq&0<I  
TSDX   1            -0.20000000     0.53999563    -0.00403671     0.20000000     0.53999563    -0.00403671 jacp':T  
Change in Focus                :       0.000000                            0.000000 -pWnO9q  
Decenter Y tolerance on surface 1 m@|0iDS  
TSDY   1            -0.20000000     0.53999563    -0.00403671     0.20000000     0.53999563    -0.00403671 b4l=Bg"  
Change in Focus                :       0.000000                            0.000000 ^lF'
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Tilt X tolerance on surface (degrees) 1 hJuR,NP  
TSTX   1            -0.20000000     0.42678383    -0.11724851     0.20000000     0.42678383    -0.11724851 k!{0ku}]  
Change in Focus                :       0.000000                            0.000000 (MI8Kkb1d  
Tilt Y tolerance on surface (degrees) 1 -k$
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TSTY   1            -0.20000000     0.42678383    -0.11724851     0.20000000     0.42678383    -0.11724851 8T:?C~"  
Change in Focus                :       0.000000                            0.000000 Z*9Qeu-N:  
Decenter X tolerance on surface 2 ||M;[-JoJ  
TSDX   2            -0.20000000     0.51705427    -0.02697807     0.20000000     0.51705427    -0.02697807 P;A9t#\  
Change in Focus                :       0.000000                            0.000000 ;IN!H@bq  
Decenter Y tolerance on surface 2 ~OuKewr\  
TSDY   2            -0.20000000     0.51705427    -0.02697807     0.20000000     0.51705427    -0.02697807 TLBIM  
Change in Focus                :       0.000000                            0.000000 j. @CB`  
Tilt X tolerance on surface (degrees) 2 3WOm`<  
TSTX   2            -0.20000000     0.35349910    -0.19053324     0.20000000     0.35349910    -0.19053324 Dy_ayxm  
Change in Focus                :       0.000000                            0.000000 &, =Z  
Tilt Y tolerance on surface (degrees) 2 nnv&~
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TSTY   2            -0.20000000     0.35349910    -0.19053324     0.20000000     0.35349910    -0.19053324 =Nyq1~   
Change in Focus                :       0.000000                            0.000000 T
#HW{3  
Decenter X tolerance on surface 3 {S+ $C  
TSDX   3            -0.20000000     0.53419039    -0.00984195     0.20000000     0.53419039    -0.00984195 ^Po^Co  
Change in Focus                :       0.000000                            0.000000 B)q 5m y  
Decenter Y tolerance on surface 3 anM]khs?  
TSDY   3            -0.20000000     0.53419039    -0.00984195     0.20000000     0.53419039    -0.00984195 !Vtj:2PQL  
Change in Focus                :       0.000000                            0.000000 -&AgjzN!  
Tilt X tolerance on surface (degrees) 3 i!|OFU6  
TSTX   3            -0.20000000     0.42861670    -0.11541563     0.20000000     0.42861670    -0.11541563 u$vA9g4  
Change in Focus                :       0.000000                            0.000000 PVNDvUce  
Tilt Y tolerance on surface (degrees) 3 a#U2y"  
TSTY   3            -0.20000000     0.42861670    -0.11541563     0.20000000     0.42861670    -0.11541563 +7`7cOqXg  
Change in Focus                :       0.000000                            0.000000 RotWMGNK  
Irregularity of surface 1 in fringes c.<bz  
TIRR   1            -0.20000000     0.50973587    -0.03429647     0.20000000     0.57333868     0.02930634 uR;m<wPH,f  
Change in Focus                :       0.000000                            0.000000 ji8)/  
Irregularity of surface 2 in fringes }K rQPg  
TIRR   2            -0.20000000     0.53400904    -0.01002330     0.20000000     0.55360281     0.00957047 Wu{cE;t  
Change in Focus                :       0.000000                            0.000000 B7y^)/  
Irregularity of surface 3 in fringes cft
'%IEs  
TIRR   3            -0.20000000     0.58078982     0.03675748     0.20000000     0.49904394    -0.04498840 ^V5VRGq  
Change in Focus                :       0.000000                            0.000000 Eku+&f@RB  
Index tolerance on surface 1 GLS`1!  
TIND   1            -0.00100000     0.52606778    -0.01796456     0.00100000     0.56121811     0.01718578 {.,-lFb\  
Change in Focus                :       0.000000                            0.000000 Hzn6H4Rc  
Index tolerance on surface 2 Cyn_UE  
TIND   2            -0.00100000     0.55639086     0.01235852     0.00100000     0.53126361    -0.01276872 ['`Vg=O.{  
Change in Focus                :       0.000000                           -0.000000 ,MmX(O0  
AA&5wDMV>  
Worst offenders: ?y1G,0,  
Type                      Value      Criterion        Change T@{}!  
TSTY   2            -0.20000000     0.35349910    -0.19053324 xE0'eC5n^  
TSTY   2             0.20000000     0.35349910    -0.19053324 @xqjAcfg  
TSTX   2            -0.20000000     0.35349910    -0.19053324 B%L dH  
TSTX   2             0.20000000     0.35349910    -0.19053324 (8XP7c]5  
TSTY   1            -0.20000000     0.42678383    -0.11724851 eHIsTL@Fp  
TSTY   1             0.20000000     0.42678383    -0.11724851 gq:2`W&5  
TSTX   1            -0.20000000     0.42678383    -0.11724851 ^U5g7Emf  
TSTX   1             0.20000000     0.42678383    -0.11724851 ?'jRUfl   
TSTY   3            -0.20000000     0.42861670    -0.11541563 @hz~9AII9  
TSTY   3             0.20000000     0.42861670    -0.11541563 [f8mh88r  
3-%F)@n  
Estimated Performance Changes based upon Root-Sum-Square method: Qf$3!O}G  
Nominal MTF                 :     0.54403234 +~ZFao qf  
Estimated change            :    -0.36299231  f^vz  
Estimated MTF               :     0.18104003 v}>5!*  
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Compensator Statistics: ~HM,@5dFC
 
Change in back focus: C7hJE-  
Minimum            :        -0.000000 ;oT!\$Mu  
Maximum            :         0.000000 5 `Mos  
Mean               :        -0.000000 !#b8QER  
Standard Deviation :         0.000000 }
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an<loLW  
Monte Carlo Analysis: F?3zw4Vt~  
Number of trials: 20 Ln3<r&&Jz  
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Initial Statistics: Normal Distribution 8s@k0T<O  
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  Trial       Criterion        Change IT5a/;J  
      1     0.42804416    -0.11598818 !^h{7NmP[  
Change in Focus                :      -0.400171 k04CSzE"%  
      2     0.54384387    -0.00018847 @/yQ4Gr  
Change in Focus                :       1.018470 :tTP3t5  
      3     0.44510003    -0.09893230 FTk`Mq  
Change in Focus                :      -0.601922 920 o]Dh=t  
      4     0.18154684    -0.36248550 'xn3g;5  
Change in Focus                :       0.920681 uJg|  
      5     0.28665820    -0.25737414 -Y:^<C^^&8  
Change in Focus                :       1.253875 -h|YS/$f  
      6     0.21263372    -0.33139862 /z(;1$Ld6{  
Change in Focus                :      -0.903878 ^j)0&}fB  
      7     0.40051424    -0.14351809 FKVf_Ncf%
 
Change in Focus                :      -1.354815 4^>FN"Ve`B  
      8     0.48754161    -0.05649072 T=-$ok`G  
Change in Focus                :       0.215922 2(%C  
      9     0.40357468    -0.14045766 :TTZ@
q  
Change in Focus                :       0.281783 !92zC._  
     10     0.26315315    -0.28087919 Ic,V,#my  
Change in Focus                :      -1.048393 $Lf-Gi  
     11     0.26120585    -0.28282649 fdCN?p[_  
Change in Focus                :       1.017611 u,f$c
R  
     12     0.24033815    -0.30369419 5Y}=,v*h}  
Change in Focus                :      -0.109292 ] 1:p
nd  
     13     0.37164046    -0.17239188 !}$,) ~<+H  
Change in Focus                :      -0.692430 zo{WmV7[|  
     14     0.48597489    -0.05805744 $SAk|  
Change in Focus                :      -0.662040 3R|C$
+Sc  
     15     0.21462327    -0.32940907 A@H
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Change in Focus                :       1.611296 @4ECz>Q  
     16     0.43378226    -0.11025008 ^|+;~3<J  
Change in Focus                :      -0.640081
5N'Z"C0  
     17     0.39321881    -0.15081353 1|8<!Hx#-  
Change in Focus                :       0.914906 XSDudL  
     18     0.20692530    -0.33710703 DFUW^0N  
Change in Focus                :       0.801607 99]&X
j  
     19     0.51374068    -0.03029165 Q&d"uLsx  
Change in Focus                :       0.947293 ' 6#e
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     20     0.38013374    -0.16389860 x,~ys4  
Change in Focus                :       0.667010 YlP8fxS  
=u,8(:R]s  
Number of traceable Monte Carlo files generated: 20 J<'7z%2w  
\A'tV/YAd  
Nominal     0.54403234 wFHbz9|@I  
Best        0.54384387    Trial     2 q/N1q&  
Worst       0.18154684    Trial     4 )vcyoq  
Mean        0.35770970 hCX_^%  
Std Dev     0.11156454 A['0~tOP  
}1)tALA  
DGY?4r7>y  
Compensator Statistics: zG0191f  
Change in back focus: b+rn:R  
Minimum            :        -1.354815 74u_YA<"  
Maximum            :         1.611296 u+ ?Wm40E  
Mean               :         0.161872 ^o@N.+`&<  
Standard Deviation :         0.869664 ha -KfkPFE  
)rce%j7  
90% >       0.20977951               "-U`E)]w*[  
80% >       0.22748071               c@xQ2&i  
50% >       0.38667627               -ghmLMS%t  
20% >       0.46553746               v.~uJ.T  
10% >       0.50064115                Z<2j#rd  
%0<-5&GE  
End of Run. <8[y2|UBt  
PAUepO_  
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 -{tB&V~+v  

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 |'R^\M Q  
D')m8:>  
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                 EC]b]'._  
80% >       0.22748071                 0)?.rthk4S  
50% >       0.38667627                 ~G;lEp  
20% >       0.46553746                 >C1**GQ  
10% >       0.50064115 E[Rd=/P6  
O$2'$44HX  
最后这个数值是MTF值呢，还是MTF的公差？ 9MmAoLm  
X;hV+|Bo  
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？？？   F_?aoP&5  
J'%  
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  : Fp_?1y  
90% >       0.20977951                 Ik4
FVL8~  
80% >       0.22748071                 }.nHT0l  
50% >       0.38667627                 6 J&_H(^  
20% >       0.46553746                 $50/wb6s  
10% >       0.50064115 |KV|x^fJ  
....... HF2w?:  

Rh[%UNl  
Zj(2
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这些数值都是MTF值

Criterion           : Geometric MTF average S&T at 30.0000 cycles per mm   SuO@LroxTB  
Mode                : Sensitivities 9S.J%*F7  
Sampling            : 2 U{8]TEv  
Nominal Criterion   : 0.54403234 -f{NVX\<0  
Test Wavelength     : 0.6328 ]TE,N$X  
4iDlBs+  
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？ lT<4c5%  
tn"n~;Bh?:  
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