[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 fK'.wX9  
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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 v]:+`dV  
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图片:2.jpg

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然后运行分析的结果如下： V#NG+U.B  
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Analysis of Tolerances *#1y6^  
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File : E:\光学设计资料\zemax练习\f500.ZMX j2}  
Title: zJ;>.0  
Date : TUE JUN 21 2011 V06CCy8n  
:xFu_%7  
Units are Millimeters. yuHZ&e  
All changes are computed using linear differences. J3e
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Paraxial Focus compensation only. BT
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WARNING: Solves should be removed prior to tolerancing. PS=e\(6QC  
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Mnemonics: D XV@DQ  
TFRN: Tolerance on curvature in fringes. :zdEq")v  
TTHI: Tolerance on thickness. OM.k?1%+M  
TSDX: Tolerance on surface decentering in x. =&A!C"qK4[  
TSDY: Tolerance on surface decentering in y. bLgL0}=n  
TSTX: Tolerance on surface tilt in x (degrees). Q2/MnM  
TSTY: Tolerance on surface tilt in y (degrees). ;gDMl57PQ.  
TIRR: Tolerance on irregularity (fringes). A8pj~I/*-  
TIND: Tolerance on Nd index of refraction.  7%}a
y  
TEDX: Tolerance on element decentering in x. e74zR6  
TEDY: Tolerance on element decentering in y. t;8\fIW5  
TETX: Tolerance on element tilt in x (degrees). _1^8xFe2  
TETY: Tolerance on element tilt in y (degrees). A4G,}r *n  
"h=6Q+Ze  
WARNING: RAY AIMING IS OFF. Very loose tolerances may not be computed accurately. z %x7fe  
&]P"48NT  
WARNING: Boundary constraints on compensators will be ignored. HA6G)x  
KRYcCn  
Criterion           : Geometric MTF average S&T at 30.0000 cycles per mm &E bI Op  
Mode                : Sensitivities Q>.B
Q;q]  
Sampling            : 2 ao#!7F  
Nominal Criterion   : 0.54403234 XZS5B~E '  
Test Wavelength     : 0.6328 ~>V-*NT8  
pDu{e>S|:  
L#D9@V'z  
Fields: XY Symmetric Angle in degrees d%0+i/p  
#      X-Field      Y-Field       Weight    VDX    VDY    VCX    VCY xS'zZ%?  
1   0.000E+000   0.000E+000   1.000E+000  0.000  0.000  0.000  0.000 2fJ{LC  
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Sensitivity Analysis: 2-++i:, g  
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                 |----------------- Minimum ----------------| |----------------- Maximum ----------------| v"Me{+  
Type                      Value      Criterion        Change          Value      Criterion        Change C+w__gO&r  
Fringe tolerance on surface 1 (;aB!(_  
TFRN   1            -1.00000000     0.54257256    -0.00145977     1.00000000     0.54548607     0.00145374 ?d$"[lKX  
Change in Focus                :      -0.000000                            0.000000 |h}B{D  
Fringe tolerance on surface 2 CSL#s^4T  
TFRN   2            -1.00000000     0.54177471    -0.00225762     1.00000000     0.54627463     0.00224230 8L%M<JRg~  
Change in Focus                :       0.000000                            0.000000 ?"6Ov ]  
Fringe tolerance on surface 3 iq?l#}]  
TFRN   3            -1.00000000     0.54779866     0.00376632     1.00000000     0.54022572    -0.00380662 @mf({Q>  
Change in Focus                :      -0.000000                            0.000000 17}$=#SX  
Thickness tolerance on surface 1 Jf7frzw  
TTHI   1   3        -0.20000000     0.54321462    -0.00081772     0.20000000     0.54484759     0.00081525 $;2)s}ci  
Change in Focus                :       0.000000                            0.000000 \m4T3fy  
Thickness tolerance on surface 2 ~-TOsRvxR  
TTHI   2   3        -0.20000000     0.54478712     0.00075478     0.20000000     0.54327558    -0.00075675 z}ElpT[(;  
Change in Focus                :       0.000000                           -0.000000 z{:-!oF&CB  
Decenter X tolerance on surfaces 1 through 3 9Bz0MUbrLl  
TEDX   1   3        -0.20000000     0.54401464   -1.7700E-005     0.20000000     0.54401464   -1.7700E-005 f1mHN7hxW  
Change in Focus                :       0.000000                            0.000000 3HZ~.  
Decenter Y tolerance on surfaces 1 through 3 xjo;kx\y^  
TEDY   1   3        -0.20000000     0.54401464   -1.7700E-005     0.20000000     0.54401464   -1.7700E-005 B^fT>1P  
Change in Focus                :       0.000000                            0.000000 O:Va&Cyj*  
Tilt X tolerance on surfaces 1 through 3 (degrees) 
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TETX   1   3        -0.20000000     0.54897548     0.00494314     0.20000000     0.54897548     0.00494314 o#>a 5  
Change in Focus                :       0.000000                            0.000000 A>=E{  
Tilt Y tolerance on surfaces 1 through 3 (degrees) nnw
JYEi  
TETY   1   3        -0.20000000     0.54897548     0.00494314     0.20000000     0.54897548     0.00494314 [4*1}}gW%5  
Change in Focus                :       0.000000                            0.000000 qI%&ay"/  
Decenter X tolerance on surface 1 a+`D'?z  
TSDX   1            -0.20000000     0.53999563    -0.00403671     0.20000000     0.53999563    -0.00403671 pMR,#[U<  
Change in Focus                :       0.000000                            0.000000 Fj1NN  
Decenter Y tolerance on surface 1 *5k+t  
TSDY   1            -0.20000000     0.53999563    -0.00403671     0.20000000     0.53999563    -0.00403671 ^~$\ g]  
Change in Focus                :       0.000000                            0.000000 lCJ6Ur;  
Tilt X tolerance on surface (degrees) 1 i?>tgmu.  
TSTX   1            -0.20000000     0.42678383    -0.11724851     0.20000000     0.42678383    -0.11724851 3J~0O2  
Change in Focus                :       0.000000                            0.000000 ,2L$G&?  
Tilt Y tolerance on surface (degrees) 1 k$N0lR4:p  
TSTY   1            -0.20000000     0.42678383    -0.11724851     0.20000000     0.42678383    -0.11724851 <8!  Tq  
Change in Focus                :       0.000000                            0.000000 |7"$w%2  
Decenter X tolerance on surface 2 7]Em,  
TSDX   2            -0.20000000     0.51705427    -0.02697807     0.20000000     0.51705427    -0.02697807 e_.Gw"/Yl  
Change in Focus                :       0.000000                            0.000000 ZF6c{~D  
Decenter Y tolerance on surface 2 @MiH(.Dq  
TSDY   2            -0.20000000     0.51705427    -0.02697807     0.20000000     0.51705427    -0.02697807 Ooc\1lX  
Change in Focus                :       0.000000                            0.000000 +5!&E7bcd  
Tilt X tolerance on surface (degrees) 2 !R'g59g  
TSTX   2            -0.20000000     0.35349910    -0.19053324     0.20000000     0.35349910    -0.19053324 VT\"q1)p  
Change in Focus                :       0.000000                            0.000000 ?>$l  
Tilt Y tolerance on surface (degrees) 2 Vi?q>:E:  
TSTY   2            -0.20000000     0.35349910    -0.19053324     0.20000000     0.35349910    -0.19053324 =dZHYO^
Cv  
Change in Focus                :       0.000000                            0.000000 Es!Q8.  
Decenter X tolerance on surface 3 aI3CNeav  
TSDX   3            -0.20000000     0.53419039    -0.00984195     0.20000000     0.53419039    -0.00984195 aS84n.?vq  
Change in Focus                :       0.000000                            0.000000 ;W]\rft[  
Decenter Y tolerance on surface 3 wM~H(=s`D  
TSDY   3            -0.20000000     0.53419039    -0.00984195     0.20000000     0.53419039    -0.00984195 dtZE67KS  
Change in Focus                :       0.000000                            0.000000 :g6n,p_#  
Tilt X tolerance on surface (degrees) 3 ),(V6@Z?  
TSTX   3            -0.20000000     0.42861670    -0.11541563     0.20000000     0.42861670    -0.11541563 }!p`1]gem  
Change in Focus                :       0.000000                            0.000000 t~``md4  
Tilt Y tolerance on surface (degrees) 3
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TSTY   3            -0.20000000     0.42861670    -0.11541563     0.20000000     0.42861670    -0.11541563 Z hd#:d  
Change in Focus                :       0.000000                            0.000000 u JY)4T  
Irregularity of surface 1 in fringes TP%+.#Fu  
TIRR   1            -0.20000000     0.50973587    -0.03429647     0.20000000     0.57333868     0.02930634 dOFD5}_   
Change in Focus                :       0.000000                            0.000000
]p7jhd=  
Irregularity of surface 2 in fringes EON:B>2a  
TIRR   2            -0.20000000     0.53400904    -0.01002330     0.20000000     0.55360281     0.00957047 S<`I Jpkv  
Change in Focus                :       0.000000                            0.000000 hI}
,~af  
Irregularity of surface 3 in fringes nXy>7H[0  
TIRR   3            -0.20000000     0.58078982     0.03675748     0.20000000     0.49904394    -0.04498840 &@% $2O.3  
Change in Focus                :       0.000000                            0.000000 KC`q#&dt  
Index tolerance on surface 1 1oiRWRe  
TIND   1            -0.00100000     0.52606778    -0.01796456     0.00100000     0.56121811     0.01718578 P 43P]M2  
Change in Focus                :       0.000000                            0.000000 }}&#|)Yq  
Index tolerance on surface 2 k(t}^50^j  
TIND   2            -0.00100000     0.55639086     0.01235852     0.00100000     0.53126361    -0.01276872 mN|r)4{`  
Change in Focus                :       0.000000                           -0.000000 piy`zc-yu  
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Worst offenders: /w(e  
Type                      Value      Criterion        Change +Q$h ]^>~  
TSTY   2            -0.20000000     0.35349910    -0.19053324 X]%itA  
TSTY   2             0.20000000     0.35349910    -0.19053324 0@I S  
TSTX   2            -0.20000000     0.35349910    -0.19053324 m3bCZ9iE  
TSTX   2             0.20000000     0.35349910    -0.19053324 bi[IqU!9  
TSTY   1            -0.20000000     0.42678383    -0.11724851 6eFp8bANN#  
TSTY   1             0.20000000     0.42678383    -0.11724851 (o5j'2:.  
TSTX   1            -0.20000000     0.42678383    -0.11724851 qpIC{'A.  
TSTX   1             0.20000000     0.42678383    -0.11724851 }e2VY  
TSTY   3            -0.20000000     0.42861670    -0.11541563 Ep9W-n?}  
TSTY   3             0.20000000     0.42861670    -0.11541563 zcrY>t#l  
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Estimated Performance Changes based upon Root-Sum-Square method: 3cdTed-MIh  
Nominal MTF                 :     0.54403234 d?wc*N3  
Estimated change            :    -0.36299231 -m *Sq  
Estimated MTF               :     0.18104003 u .f= te  
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Compensator Statistics: \K`L3*cBKK  
Change in back focus: js iSg/  
Minimum            :        -0.000000 eET&pP3Rp  
Maximum            :         0.000000 s\!>"J bAQ  
Mean               :        -0.000000 ljTBvU  
Standard Deviation :         0.000000 |L2SFB?d=  
mKrh[nA  
Monte Carlo Analysis: (T`E!A0I\?  
Number of trials: 20 2 3OC2|  
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Initial Statistics: Normal Distribution wLK07e(  
(aOv#Vor]%  
  Trial       Criterion        Change !?c|XdjZ  
      1     0.42804416    -0.11598818 .<@8gNm3  
Change in Focus                :      -0.400171 }PTV] q%  
      2     0.54384387    -0.00018847 V"c 6Kdtd  
Change in Focus                :       1.018470 y@0E[/O  
      3     0.44510003    -0.09893230 [sB 9gY(  
Change in Focus                :      -0.601922 X 1 57$  
      4     0.18154684    -0.36248550 -py@DzK  
Change in Focus                :       0.920681 {~Rk2:gx  
      5     0.28665820    -0.25737414 ,eTU/Q>{,&  
Change in Focus                :       1.253875 I(S`j[U  
      6     0.21263372    -0.33139862 a~'a  
Change in Focus                :      -0.903878 wgCa58H76  
      7     0.40051424    -0.14351809 If\fLhM  
Change in Focus                :      -1.354815 0c}  }Q  
      8     0.48754161    -0.05649072 :q#Xq;Wp  
Change in Focus                :       0.215922 `BlI@6th  
      9     0.40357468    -0.14045766 9eH$XYy
 
Change in Focus                :       0.281783 0u\GO;  
     10     0.26315315    -0.28087919 feQ **wI  
Change in Focus                :      -1.048393 g$b<1:8  
     11     0.26120585    -0.28282649 ZYC<Wb)I  
Change in Focus                :       1.017611 ~l)-wNqR4r  
     12     0.24033815    -0.30369419 &Z`#cMR{H  
Change in Focus                :      -0.109292 }GeSu|m(  
     13     0.37164046    -0.17239188 EK4d_L]I  
Change in Focus                :      -0.692430 yu;P +G  
     14     0.48597489    -0.05805744 J+`VujWT  
Change in Focus                :      -0.662040 6I%5Q4Ll  
     15     0.21462327    -0.32940907 iyg*Xbmi~.  
Change in Focus                :       1.611296 O#F4WWF  
     16     0.43378226    -0.11025008 EOCN
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Change in Focus                :      -0.640081 [eC2"&}  
     17     0.39321881    -0.15081353 tCdqh- 
 
Change in Focus                :       0.914906 V,%=AR5
 
     18     0.20692530    -0.33710703 ,^C--tgZJg  
Change in Focus                :       0.801607 H'  
     19     0.51374068    -0.03029165 DQr Y*nH  
Change in Focus                :       0.947293 0tXS3+@n=  
     20     0.38013374    -0.16389860 m6w].-D8  
Change in Focus                :       0.667010 ;C2K~8,  
zx)z/
1  
Number of traceable Monte Carlo files generated: 20 >
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0$ S8fF@  
Nominal     0.54403234 neLAEHV  
Best        0.54384387    Trial     2 <i&_ooX  
Worst       0.18154684    Trial     4 Ru>MFG  
Mean        0.35770970 ]@phF _  
Std Dev     0.11156454 t+!$[K0/  
B!?%O  
i%0ur}p  
Compensator Statistics: ~XOTs  
Change in back focus: R}!:'^  
Minimum            :        -1.354815 AJF#Aw `o  
Maximum            :         1.611296 /w}u3|L$  
Mean               :         0.161872 _sTROd)Vh  
Standard Deviation :         0.869664 'F9jq  
Pu"P9  
90% >       0.20977951               zd >t-?g  
80% >       0.22748071               &7K?
w~  
50% >       0.38667627               T7hcn
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20% >       0.46553746               Qo{/@  
10% >       0.50064115                -#N.X_F  
#Up86(Z  
End of Run. 
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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 kY-N>E:  

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 0"28'  
j~[z2tV  
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                  ]hk  
80% >       0.22748071                 3no%E03p  
50% >       0.38667627                 G\2CR*  
20% >       0.46553746                 RO+GK`J  
10% >       0.50064115 ~=M7 3U#  
iT3BF"ZqBO  
最后这个数值是MTF值呢，还是MTF的公差？ @E7DyU|  
B~MU^|v  
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？？？   1"MhGNynB>  
[1g8*j~L  
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  : ^cOUQ33  
90% >       0.20977951                 B]nEkO'a:  
80% >       0.22748071                 Q3kdlxXR  
50% >       0.38667627                 yZ0-wI  
20% >       0.46553746                 w$3,A$8  
10% >       0.50064115 ~8'sBT  
....... ?&8^&brwG  

7Od -I*bt  
vv72x]  
这些数值都是MTF值

Criterion           : Geometric MTF average S&T at 30.0000 cycles per mm   Kfbb)?  
Mode                : Sensitivities NH[kNi'  
Sampling            : 2 [`ebM,W  
Nominal Criterion   : 0.54403234 Z+*9#!?J  
Test Wavelength     : 0.6328 !EvAB+`jLI  
hr#M-K  
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？ h0(BO*cy  
OSRp0G20k\  
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