[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 M_E$w$l2<  
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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 ~\b+  
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图片:2.jpg

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然后运行分析的结果如下： aRWj+[[7y  
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Analysis of Tolerances %iIr %P?  
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File : E:\光学设计资料\zemax练习\f500.ZMX fvTp9T\f3  
Title: 2i6P<&@  
Date : TUE JUN 21 2011 JK^%V\m  
L~|_)4  
Units are Millimeters. u5qaLHoEP  
All changes are computed using linear differences. A;C4>U Y  
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Paraxial Focus compensation only. U.^
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tJd/uQJ  
WARNING: Solves should be removed prior to tolerancing. +BI%.A`2  
CD?b.Cxai  
Mnemonics: !&KE">3Qu  
TFRN: Tolerance on curvature in fringes. !h1|B7N  
TTHI: Tolerance on thickness. P1TTaYu  
TSDX: Tolerance on surface decentering in x. A#~CZQY^$  
TSDY: Tolerance on surface decentering in y. P6^\*xkMr  
TSTX: Tolerance on surface tilt in x (degrees). 9~f RYA*  
TSTY: Tolerance on surface tilt in y (degrees). V^G+_#@,,  
TIRR: Tolerance on irregularity (fringes). 6 ;\>,  
TIND: Tolerance on Nd index of refraction. ,5*<C'9  
TEDX: Tolerance on element decentering in x. )u!}`UJ  
TEDY: Tolerance on element decentering in y. %I)*5M6  
TETX: Tolerance on element tilt in x (degrees). >
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TETY: Tolerance on element tilt in y (degrees). `kOp9(Q{  
&s.-p_4w^D  
WARNING: RAY AIMING IS OFF. Very loose tolerances may not be computed accurately. bb/A}< zD  
MGKSaP;x  
WARNING: Boundary constraints on compensators will be ignored. QA!'p1{#  
![%:X)?  
Criterion           : Geometric MTF average S&T at 30.0000 cycles per mm 1@]gBv<  
Mode                : Sensitivities z
q^eL=%:  
Sampling            : 2 Vc|Q
W  
Nominal Criterion   : 0.54403234 ?y*yl  
Test Wavelength     : 0.6328 ug`Jn&x!  
~|wh/]{b9  
z{> )'A/  
Fields: XY Symmetric Angle in degrees [py/\zkn  
#      X-Field      Y-Field       Weight    VDX    VDY    VCX    VCY ;2eZa|M*q  
1   0.000E+000   0.000E+000   1.000E+000  0.000  0.000  0.000  0.000 8`w#)6(V  
F,GG>(6c  
Sensitivity Analysis:  #|l#  
a,*|*Cv  
                 |----------------- Minimum ----------------| |----------------- Maximum ----------------| 9@p+g`o  
Type                      Value      Criterion        Change          Value      Criterion        Change @2A&eLwLH  
Fringe tolerance on surface 1 N*
hx;k9  
TFRN   1            -1.00000000     0.54257256    -0.00145977     1.00000000     0.54548607     0.00145374 [ 3SbWwg  
Change in Focus                :      -0.000000                            0.000000 ?0+J"FH# W  
Fringe tolerance on surface 2 Fmrl*tr  
TFRN   2            -1.00000000     0.54177471    -0.00225762     1.00000000     0.54627463     0.00224230 _H2%6t/V  
Change in Focus                :       0.000000                            0.000000 /@s(8{;  
Fringe tolerance on surface 3 "g;}B"rG  
TFRN   3            -1.00000000     0.54779866     0.00376632     1.00000000     0.54022572    -0.00380662 \G]vTK3  
Change in Focus                :      -0.000000                            0.000000 llBW*4'  
Thickness tolerance on surface 1 \]t}N  
TTHI   1   3        -0.20000000     0.54321462    -0.00081772     0.20000000     0.54484759     0.00081525 b;(BMO,(  
Change in Focus                :       0.000000                            0.000000 M*jn8OE  
Thickness tolerance on surface 2 @z.HyQ_v  
TTHI   2   3        -0.20000000     0.54478712     0.00075478     0.20000000     0.54327558    -0.00075675 qc^qCGy!z  
Change in Focus                :       0.000000                           -0.000000 ?[Qxq34  
Decenter X tolerance on surfaces 1 through 3 EtvYIfemr  
TEDX   1   3        -0.20000000     0.54401464   -1.7700E-005     0.20000000     0.54401464   -1.7700E-005 #>\8m+h 9  
Change in Focus                :       0.000000                            0.000000 &uTK@ G+  
Decenter Y tolerance on surfaces 1 through 3 o{ \r1<D  
TEDY   1   3        -0.20000000     0.54401464   -1.7700E-005     0.20000000     0.54401464   -1.7700E-005 jJY!;f  
Change in Focus                :       0.000000                            0.000000 2Yd;#i)  
Tilt X tolerance on surfaces 1 through 3 (degrees) IY9##&c3>  
TETX   1   3        -0.20000000     0.54897548     0.00494314     0.20000000     0.54897548     0.00494314 ww{07g  
Change in Focus                :       0.000000                            0.000000 (V+iJ_1g{  
Tilt Y tolerance on surfaces 1 through 3 (degrees) v4x1=E  
TETY   1   3        -0.20000000     0.54897548     0.00494314     0.20000000     0.54897548     0.00494314 SE!0f&  
Change in Focus                :       0.000000                            0.000000 Z0%Qy+%  
Decenter X tolerance on surface 1 > 1&_-  
TSDX   1            -0.20000000     0.53999563    -0.00403671     0.20000000     0.53999563    -0.00403671 UzmD2AsO"  
Change in Focus                :       0.000000                            0.000000 Kkds^v6  
Decenter Y tolerance on surface 1 7 S2QTRvH  
TSDY   1            -0.20000000     0.53999563    -0.00403671     0.20000000     0.53999563    -0.00403671 GSu&Z/Jo  
Change in Focus                :       0.000000                            0.000000 Bso3Z ^X.  
Tilt X tolerance on surface (degrees) 1 .Cf`D tK  
TSTX   1            -0.20000000     0.42678383    -0.11724851     0.20000000     0.42678383    -0.11724851 !|S{e^WhbU  
Change in Focus                :       0.000000                            0.000000 FY;R0+N  
Tilt Y tolerance on surface (degrees) 1 L9)
nRV8  
TSTY   1            -0.20000000     0.42678383    -0.11724851     0.20000000     0.42678383    -0.11724851 4~/3MG  
Change in Focus                :       0.000000                            0.000000 ;v1&Rs  
Decenter X tolerance on surface 2 wi/dR}*A  
TSDX   2            -0.20000000     0.51705427    -0.02697807     0.20000000     0.51705427    -0.02697807 Vnq&lz%QqC  
Change in Focus                :       0.000000                            0.000000 |\~!oN  
Decenter Y tolerance on surface 2 [P23.`G~J  
TSDY   2            -0.20000000     0.51705427    -0.02697807     0.20000000     0.51705427    -0.02697807 ({AqL#x`u  
Change in Focus                :       0.000000                            0.000000 PG/xX H  
Tilt X tolerance on surface (degrees) 2 ep2#a#&'  
TSTX   2            -0.20000000     0.35349910    -0.19053324     0.20000000     0.35349910    -0.19053324 a5xp[TlXn.  
Change in Focus                :       0.000000                            0.000000 5}t}Wc8  
Tilt Y tolerance on surface (degrees) 2 f'<MDLl  
TSTY   2            -0.20000000     0.35349910    -0.19053324     0.20000000     0.35349910    -0.19053324 &
ahZ_9Q  
Change in Focus                :       0.000000                            0.000000 6>Szxkz  
Decenter X tolerance on surface 3 w
tw  
TSDX   3            -0.20000000     0.53419039    -0.00984195     0.20000000     0.53419039    -0.00984195 I=I'O?w  
Change in Focus                :       0.000000                            0.000000 (AnM_s
 
Decenter Y tolerance on surface 3 XZFM|=%X  
TSDY   3            -0.20000000     0.53419039    -0.00984195     0.20000000     0.53419039    -0.00984195 5b2_{6t  
Change in Focus                :       0.000000                            0.000000 L.@o  
Tilt X tolerance on surface (degrees) 3 7 a}qnk%  
TSTX   3            -0.20000000     0.42861670    -0.11541563     0.20000000     0.42861670    -0.11541563 -?$Hr\  
Change in Focus                :       0.000000                            0.000000 ^B|Q&1  
Tilt Y tolerance on surface (degrees) 3 U&\8~h  
TSTY   3            -0.20000000     0.42861670    -0.11541563     0.20000000     0.42861670    -0.11541563 #\]:lr{>?4  
Change in Focus                :       0.000000                            0.000000 Xr@]7: ,  
Irregularity of surface 1 in fringes 2=6}! Y  
TIRR   1            -0.20000000     0.50973587    -0.03429647     0.20000000     0.57333868     0.02930634 2& l~8,  
Change in Focus                :       0.000000                            0.000000 .:b|imgiv  
Irregularity of surface 2 in fringes *h>KeIB;  
TIRR   2            -0.20000000     0.53400904    -0.01002330     0.20000000     0.55360281     0.00957047 X_eh+>D  
Change in Focus                :       0.000000                            0.000000 8&"@6/)[  
Irregularity of surface 3 in fringes ~)JNevLZ  
TIRR   3            -0.20000000     0.58078982     0.03675748     0.20000000     0.49904394    -0.04498840 VY5/C;0^h  
Change in Focus                :       0.000000                            0.000000 1c} %_Z/  
Index tolerance on surface 1 [l2ds:  
TIND   1            -0.00100000     0.52606778    -0.01796456     0.00100000     0.56121811     0.01718578 1 f;k)x  
Change in Focus                :       0.000000                            0.000000 D^knN-nZ*  
Index tolerance on surface 2 AVys`{*c  
TIND   2            -0.00100000     0.55639086     0.01235852     0.00100000     0.53126361    -0.01276872 '
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Change in Focus                :       0.000000                           -0.000000 DhwFD8tT  
B9RB/vHH  
Worst offenders: *c+Kqz-  
Type                      Value      Criterion        Change yqm^4)Dp  
TSTY   2            -0.20000000     0.35349910    -0.19053324 2,Og(_0>  
TSTY   2             0.20000000     0.35349910    -0.19053324 Xk_xTzJ  
TSTX   2            -0.20000000     0.35349910    -0.19053324 ~EVD NnHEr  
TSTX   2             0.20000000     0.35349910    -0.19053324 f"j"ZM{~U  
TSTY   1            -0.20000000     0.42678383    -0.11724851 y%21`y&Os  
TSTY   1             0.20000000     0.42678383    -0.11724851 xi.L?"^/!  
TSTX   1            -0.20000000     0.42678383    -0.11724851 .'q0*Pe  
TSTX   1             0.20000000     0.42678383    -0.11724851 ]iyJ>fC  
TSTY   3            -0.20000000     0.42861670    -0.11541563 Q}N.DM@d3  
TSTY   3             0.20000000     0.42861670    -0.11541563 >+w(%;i;  
PyD'lsV  
Estimated Performance Changes based upon Root-Sum-Square method: :1eJc2o  
Nominal MTF                 :     0.54403234 s\6kXR  
Estimated change            :    -0.36299231 4{h?!Z*  
Estimated MTF               :     0.18104003 $\|$ekil4  
3:f<cy   
Compensator Statistics: 9~^%v zM  
Change in back focus: 9nFPGIz+  
Minimum            :        -0.000000 xbFoXYqgP  
Maximum            :         0.000000 ][|)qQ%V  
Mean               :        -0.000000 Cw<bu|?  
Standard Deviation :         0.000000 SEn-8ZF  
CF`tNA3fxm  
Monte Carlo Analysis: /Ot=GhN]  
Number of trials: 20 I-E}D"F;p[  
}vRs n-E@  
Initial Statistics: Normal Distribution 9OeY59 :  
7.n/W|\  
  Trial       Criterion        Change 2Rc'1sCth-  
      1     0.42804416    -0.11598818 Vj7(6'Hg  
Change in Focus                :      -0.400171 +)C?v&N  
      2     0.54384387    -0.00018847 4}FuoQL  
Change in Focus                :       1.018470 Kf<-PA  
      3     0.44510003    -0.09893230 T#.5F7$u  
Change in Focus                :      -0.601922 $d4^e&s  
      4     0.18154684    -0.36248550 K<O1PrC  
Change in Focus                :       0.920681 k#8,:B2  
      5     0.28665820    -0.25737414 $6~D 2K  
Change in Focus                :       1.253875 ]VifDFL
}  
      6     0.21263372    -0.33139862 N@$g"w  
Change in Focus                :      -0.903878 [-X=lJ:+h  
      7     0.40051424    -0.14351809 A7*<,]qT  
Change in Focus                :      -1.354815 _cqBp7  
      8     0.48754161    -0.05649072 #{
)=%5=c  
Change in Focus                :       0.215922 tN&x6O+@  
      9     0.40357468    -0.14045766 / vI sX3v  
Change in Focus                :       0.281783 !7MC[z(|N  
     10     0.26315315    -0.28087919 ?lJm}0>  
Change in Focus                :      -1.048393 #/NZ0IbHk  
     11     0.26120585    -0.28282649 lE~5 b  
Change in Focus                :       1.017611 .'md `@t  
     12     0.24033815    -0.30369419 {{c/:FTEU  
Change in Focus                :      -0.109292 cD&53FPXC  
     13     0.37164046    -0.17239188 'u }|~u
?m  
Change in Focus                :      -0.692430 >=|Dir  
     14     0.48597489    -0.05805744 jTbJL  
Change in Focus                :      -0.662040 wu5]S)?*  
     15     0.21462327    -0.32940907 hr&&"d {s  
Change in Focus                :       1.611296 5Z]zul@+*  
     16     0.43378226    -0.11025008 P9~7GFas|  
Change in Focus                :      -0.640081 q-%;~LF  
     17     0.39321881    -0.15081353 /3F4t V  
Change in Focus                :       0.914906 c:0nOP  
     18     0.20692530    -0.33710703 5;wA7@  
Change in Focus                :       0.801607 +H5=zf2  
     19     0.51374068    -0.03029165 `+_UG^aeW  
Change in Focus                :       0.947293 -POV#1s  
     20     0.38013374    -0.16389860 }5~|h%  
Change in Focus                :       0.667010 8_8r{a<xW  
b4GD}kR  
Number of traceable Monte Carlo files generated: 20 \F;V69'  
V)M+dhl  
Nominal     0.54403234 R[Q`2ggG  
Best        0.54384387    Trial     2 aqq7u5O1
r  
Worst       0.18154684    Trial     4 R=g~od[N_  
Mean        0.35770970 ~1&%,$fZ  
Std Dev     0.11156454 1Zc1CUMG  
>p4#AfGF  
HS3]8nJW  
Compensator Statistics: rQ -pD  
Change in back focus: ',L>UIXw  
Minimum            :        -1.354815 E/mp.f2!  
Maximum            :         1.611296 5gnNgt~  
Mean               :         0.161872 h2g|D(u)  
Standard Deviation :         0.869664 Y!e  
xc[LbaBG  
90% >       0.20977951               <[O8{9j  
80% >       0.22748071               Ws"eF0,'Z  
50% >       0.38667627               ?N2/;u>  
20% >       0.46553746               ~kUdHne(  
10% >       0.50064115                =h,6/cs  
fHTqLYd-  
End of Run. tZlz0BY!  
f/t1@d!  
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 <11pk  

图片:3.JPG

+b_g,RNs!  
iM;7V*u  
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 O,(p><k$/  
Rg3 Lo ?  
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                 ~nk{\ rWO  
80% >       0.22748071                 v;.7-9c*  
50% >       0.38667627                 \tf \fa  
20% >       0.46553746                 # Vz9j  
10% >       0.50064115 ;WX)g&19x  
4$Oakl*l  
最后这个数值是MTF值呢，还是MTF的公差？ 3=w$1.B d  
zbsdK  
也就是说，这到底是有90%的产品MTF大于0.20977951还是90%的产品的MTF变化量大于0.20977951？？？   ud]O'@G<  
h$[}lZDg  
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  : uE{r09^q\  
90% >       0.20977951                 wrw4Uxq  
80% >       0.22748071                 o+{]&V->gN  
50% >       0.38667627                 -'SpSy'_  
20% >       0.46553746                 l":\@rm`  
10% >       0.50064115 a2J01B  
....... P)7:G?OTx  

FbH 1yz  
X2CpA;#;7l  
这些数值都是MTF值

Criterion           : Geometric MTF average S&T at 30.0000 cycles per mm   ySkz5K+|g  
Mode                : Sensitivities Sfl. &A(  
Sampling            : 2 bF_SD\/  
Nominal Criterion   : 0.54403234 ),DLrGOl  
Test Wavelength     : 0.6328 )DR/Xu;b  
o03Y w)*  
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*b;'o  
msf%i!  
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