[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 5X)M)"rq;V  
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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 ~>u|7M$(  
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图片:2.jpg

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然后运行分析的结果如下： O;<wDh)Yt  
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Analysis of Tolerances =;uMrb4  
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File : E:\光学设计资料\zemax练习\f500.ZMX b/:wpy+9Z  
Title: }^Q:Q\  
Date : TUE JUN 21 2011 >jAFt_  
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Units are Millimeters. #\l
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All changes are computed using linear differences. y'!
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w/m@(EBK  
Paraxial Focus compensation only. jjj<B
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WARNING: Solves should be removed prior to tolerancing. ?<!qF:r:  
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Mnemonics: &/WM:]^?0)  
TFRN: Tolerance on curvature in fringes. MZ,1mR  
TTHI: Tolerance on thickness. 8eS(gKD  
TSDX: Tolerance on surface decentering in x. O68-G   
TSDY: Tolerance on surface decentering in y. Qs,\P^n  
TSTX: Tolerance on surface tilt in x (degrees). hXjZ>n``  
TSTY: Tolerance on surface tilt in y (degrees). *{w0=J[15  
TIRR: Tolerance on irregularity (fringes). HD=F2p  
TIND: Tolerance on Nd index of refraction. (O0Ry2uk  
TEDX: Tolerance on element decentering in x. KM?4J6jH  
TEDY: Tolerance on element decentering in y. Mc@9ivwL#  
TETX: Tolerance on element tilt in x (degrees). ZDFq=)0C  
TETY: Tolerance on element tilt in y (degrees). |?^<=%  
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WARNING: RAY AIMING IS OFF. Very loose tolerances may not be computed accurately. ?`U_|Yo  
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WARNING: Boundary constraints on compensators will be ignored. "i;.>  
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Criterion           : Geometric MTF average S&T at 30.0000 cycles per mm ^~[7])}g6  
Mode                : Sensitivities 5Z!$?J4Rl  
Sampling            : 2 ~rBFP)  
Nominal Criterion   : 0.54403234 Qt+D ,X  
Test Wavelength     : 0.6328 D
z~0(  
h(/? 81:  
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Fields: XY Symmetric Angle in degrees  pRobx  
#      X-Field      Y-Field       Weight    VDX    VDY    VCX    VCY cpa" ,8  
1   0.000E+000   0.000E+000   1.000E+000  0.000  0.000  0.000  0.000 3k)xzv%r`  
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Sensitivity Analysis: aA|{r/.10K  
OCx'cSs-=  
                 |----------------- Minimum ----------------| |----------------- Maximum ----------------| ;\0|1Eem`  
Type                      Value      Criterion        Change          Value      Criterion        Change 1YV1Xnn,  
Fringe tolerance on surface 1 L[2qCxB'^  
TFRN   1            -1.00000000     0.54257256    -0.00145977     1.00000000     0.54548607     0.00145374 a20w.6F  
Change in Focus                :      -0.000000                            0.000000 w"9h_;'C_  
Fringe tolerance on surface 2 Ep;uz5 ^8  
TFRN   2            -1.00000000     0.54177471    -0.00225762     1.00000000     0.54627463     0.00224230 $#hU_vr  
Change in Focus                :       0.000000                            0.000000 b\}a   
Fringe tolerance on surface 3 v8f3B<kj  
TFRN   3            -1.00000000     0.54779866     0.00376632     1.00000000     0.54022572    -0.00380662 #H~55))F  
Change in Focus                :      -0.000000                            0.000000 lubsLI  
Thickness tolerance on surface 1 qB$-H' j:;  
TTHI   1   3        -0.20000000     0.54321462    -0.00081772     0.20000000     0.54484759     0.00081525 9A.NM+u7  
Change in Focus                :       0.000000                            0.000000 n>v1<
^  
Thickness tolerance on surface 2 cn} CI  
TTHI   2   3        -0.20000000     0.54478712     0.00075478     0.20000000     0.54327558    -0.00075675 7He"IJ  
Change in Focus                :       0.000000                           -0.000000 XS&Pc  
Decenter X tolerance on surfaces 1 through 3 8UjIC4'  
TEDX   1   3        -0.20000000     0.54401464   -1.7700E-005     0.20000000     0.54401464   -1.7700E-005 ^&Yt
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Change in Focus                :       0.000000                            0.000000 FvT4?7-  
Decenter Y tolerance on surfaces 1 through 3 %0-oZL  
TEDY   1   3        -0.20000000     0.54401464   -1.7700E-005     0.20000000     0.54401464   -1.7700E-005 @o0HD
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Change in Focus                :       0.000000                            0.000000 uBww  
Tilt X tolerance on surfaces 1 through 3 (degrees) eV?%3h.   
TETX   1   3        -0.20000000     0.54897548     0.00494314     0.20000000     0.54897548     0.00494314 ExO#V9DaW  
Change in Focus                :       0.000000                            0.000000 |-=-/u1  
Tilt Y tolerance on surfaces 1 through 3 (degrees) jI8`trD  
TETY   1   3        -0.20000000     0.54897548     0.00494314     0.20000000     0.54897548     0.00494314 PL=v,NB  
Change in Focus                :       0.000000                            0.000000 ^`yhN  
Decenter X tolerance on surface 1 ,5c7jZ5H  
TSDX   1            -0.20000000     0.53999563    -0.00403671     0.20000000     0.53999563    -0.00403671 SdlO]y9E  
Change in Focus                :       0.000000                            0.000000 QgU]3`z"  
Decenter Y tolerance on surface 1 _|C3\x1c  
TSDY   1            -0.20000000     0.53999563    -0.00403671     0.20000000     0.53999563    -0.00403671 55O}SUs!P  
Change in Focus                :       0.000000                            0.000000 mHMsK}=~  
Tilt X tolerance on surface (degrees) 1 uN<=v&]q  
TSTX   1            -0.20000000     0.42678383    -0.11724851     0.20000000     0.42678383    -0.11724851 c/K#W$ l  
Change in Focus                :       0.000000                            0.000000 U=D;CjAh  
Tilt Y tolerance on surface (degrees) 1 961&rR}d  
TSTY   1            -0.20000000     0.42678383    -0.11724851     0.20000000     0.42678383    -0.11724851 F[\T'{  
Change in Focus                :       0.000000                            0.000000 [1(eSH  
Decenter X tolerance on surface 2 ,.P]5 lE  
TSDX   2            -0.20000000     0.51705427    -0.02697807     0.20000000     0.51705427    -0.02697807 zdJPMNHg  
Change in Focus                :       0.000000                            0.000000 ;b [>{Q;  
Decenter Y tolerance on surface 2 LE}`rW3  
TSDY   2            -0.20000000     0.51705427    -0.02697807     0.20000000     0.51705427    -0.02697807 wBpt W2jA  
Change in Focus                :       0.000000                            0.000000 %@:>hQ2;  
Tilt X tolerance on surface (degrees) 2 G
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TSTX   2            -0.20000000     0.35349910    -0.19053324     0.20000000     0.35349910    -0.19053324 PNAvT$0LaZ  
Change in Focus                :       0.000000                            0.000000 Q+Nnj(AQY  
Tilt Y tolerance on surface (degrees) 2 esSj 3E  
TSTY   2            -0.20000000     0.35349910    -0.19053324     0.20000000     0.35349910    -0.19053324 ]B(}^N>WH  
Change in Focus                :       0.000000                            0.000000 6g-jhsW6  
Decenter X tolerance on surface 3 Q)aoc.f!v  
TSDX   3            -0.20000000     0.53419039    -0.00984195     0.20000000     0.53419039    -0.00984195 DH.`  
Change in Focus                :       0.000000                            0.000000 &k)+]r  
Decenter Y tolerance on surface 3 Ia](CN*;6  
TSDY   3            -0.20000000     0.53419039    -0.00984195     0.20000000     0.53419039    -0.00984195 DH\Ox>b=  
Change in Focus                :       0.000000                            0.000000 %t_'rv  
Tilt X tolerance on surface (degrees) 3 i-0 :Fs  
TSTX   3            -0.20000000     0.42861670    -0.11541563     0.20000000     0.42861670    -0.11541563 LF.i0^#J
 
Change in Focus                :       0.000000                            0.000000 \_.'/<aQ  
Tilt Y tolerance on surface (degrees) 3 yzfiH4  
TSTY   3            -0.20000000     0.42861670    -0.11541563     0.20000000     0.42861670    -0.11541563 7x`$A  
Change in Focus                :       0.000000                            0.000000 ?:vg`m!*  
Irregularity of surface 1 in fringes 9Y2u/|!.3  
TIRR   1            -0.20000000     0.50973587    -0.03429647     0.20000000     0.57333868     0.02930634 *}:P  
Change in Focus                :       0.000000                            0.000000 z]g#2xD2  
Irregularity of surface 2 in fringes .nIGs'P  
TIRR   2            -0.20000000     0.53400904    -0.01002330     0.20000000     0.55360281     0.00957047 i/!{k2  
Change in Focus                :       0.000000                            0.000000 rIPg,4y*S!  
Irregularity of surface 3 in fringes |8}y?kAC  
TIRR   3            -0.20000000     0.58078982     0.03675748     0.20000000     0.49904394    -0.04498840 ;,Vdj[W$>  
Change in Focus                :       0.000000                            0.000000 f|~'(~Sr  
Index tolerance on surface 1 d3EN0e+^  
TIND   1            -0.00100000     0.52606778    -0.01796456     0.00100000     0.56121811     0.01718578 j\KOKvY)  
Change in Focus                :       0.000000                            0.000000 n\Is}Czl  
Index tolerance on surface 2 vH6(p(l  
TIND   2            -0.00100000     0.55639086     0.01235852     0.00100000     0.53126361    -0.01276872 \t{4pobo  
Change in Focus                :       0.000000                           -0.000000 B_Wig2xH0  
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Worst offenders: |qpm  
Type                      Value      Criterion        Change P `<TO   
TSTY   2            -0.20000000     0.35349910    -0.19053324 n)cc\JPQ  
TSTY   2             0.20000000     0.35349910    -0.19053324 1;./e&%%  
TSTX   2            -0.20000000     0.35349910    -0.19053324 + ,]&&  
TSTX   2             0.20000000     0.35349910    -0.19053324 6R m dt  
TSTY   1            -0.20000000     0.42678383    -0.11724851 ajRht+{  
TSTY   1             0.20000000     0.42678383    -0.11724851 M97+YMY)  
TSTX   1            -0.20000000     0.42678383    -0.11724851 D3 +|Os)  
TSTX   1             0.20000000     0.42678383    -0.11724851 dh}"uM}a  
TSTY   3            -0.20000000     0.42861670    -0.11541563 vIi&D;  
TSTY   3             0.20000000     0.42861670    -0.11541563 ]nV_K}!w  
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Estimated Performance Changes based upon Root-Sum-Square method: 9&
kY>M>z0  
Nominal MTF                 :     0.54403234 %\v  
Estimated change            :    -0.36299231 ,EH-Sf2Cb  
Estimated MTF               :     0.18104003 zGO_S\  
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Compensator Statistics: pkIQ,W{Ke  
Change in back focus: f3,Xb ]h  
Minimum            :        -0.000000 ]%7m+-h@  
Maximum            :         0.000000 LfnQcI$kO  
Mean               :        -0.000000 V'.gE6we  
Standard Deviation :         0.000000 #I ,c'Vj  
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Monte Carlo Analysis: "}uu-5]3  
Number of trials: 20 ,iiI5FR  
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Initial Statistics: Normal Distribution ieEtC,U  
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  Trial       Criterion        Change D_f:D^  
      1     0.42804416    -0.11598818 6(Cjak+~!  
Change in Focus                :      -0.400171 M;-FW5O't  
      2     0.54384387    -0.00018847 H6#SP~V  
Change in Focus                :       1.018470 Odt<WG  
      3     0.44510003    -0.09893230 {dl@#Tu  
Change in Focus                :      -0.601922 `EP-Qlm  
      4     0.18154684    -0.36248550 4mGRk)hk:>  
Change in Focus                :       0.920681 \>/AF<2"  
      5     0.28665820    -0.25737414 h1j1PRE  
Change in Focus                :       1.253875 Q>=/u-  
      6     0.21263372    -0.33139862 i[U=-4 J  
Change in Focus                :      -0.903878 huin?,eGz  
      7     0.40051424    -0.14351809 9mv6  
Change in Focus                :      -1.354815 gcM(K.n  
      8     0.48754161    -0.05649072 :OaGdL   
Change in Focus                :       0.215922 s;[64ca]Q  
      9     0.40357468    -0.14045766 >vf
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Change in Focus                :       0.281783 b!;WF  
     10     0.26315315    -0.28087919 [/cJc%{N  
Change in Focus                :      -1.048393 8/9YR(H3H  
     11     0.26120585    -0.28282649 G#^6H]`[J:  
Change in Focus                :       1.017611 B8-Y)u1G  
     12     0.24033815    -0.30369419 ~r]$(V n  
Change in Focus                :      -0.109292 1N8YD .3  
     13     0.37164046    -0.17239188 \cAifU  
Change in Focus                :      -0.692430 ^
6,}*@  
     14     0.48597489    -0.05805744 kb*b|pWlO  
Change in Focus                :      -0.662040 >F!X'#Iv  
     15     0.21462327    -0.32940907 aOW~! f/M  
Change in Focus                :       1.611296 7 (i\?  
     16     0.43378226    -0.11025008 X0m6<q  
Change in Focus                :      -0.640081 <,'^dR7,  
     17     0.39321881    -0.15081353 WoMMAo~  
Change in Focus                :       0.914906 6}mSA@4&  
     18     0.20692530    -0.33710703 sr.!EQ]  
Change in Focus                :       0.801607 2f0_Xw_V_  
     19     0.51374068    -0.03029165 #fe zUU  
Change in Focus                :       0.947293 h3-dJgb  
     20     0.38013374    -0.16389860 (7PVfS>;  
Change in Focus                :       0.667010 w>#.id[k  
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Number of traceable Monte Carlo files generated: 20 p
["20?^  
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Nominal     0.54403234 Q"{Q]IT  
Best        0.54384387    Trial     2 771r(X?Fa  
Worst       0.18154684    Trial     4 U| 1&=8l
 
Mean        0.35770970 ~M J3-<I  
Std Dev     0.11156454 yi1V\8DC  
V^p XbDRl  
.*w3ryQ  
Compensator Statistics: {cYbM[}U"  
Change in back focus: Ds%~J  
Minimum            :        -1.354815 Js8d{\0\  
Maximum            :         1.611296 ;hU~nj+{  
Mean               :         0.161872 =Cr F(wVO"  
Standard Deviation :         0.869664 +QFY.>KH  
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90% >       0.20977951               k'Z$#  
80% >       0.22748071               V}"w8i+D?  
50% >       0.38667627               [kg*BaG:  
20% >       0.46553746               !xZ`()D#  
10% >       0.50064115                N]@e7P'9F  
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End of Run. E@$HO_;&  
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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 )SFyQ  

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 nHi6$} I  
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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                 :X6A9jmd  
80% >       0.22748071                 |YAnd=$  
50% >       0.38667627                 RGim):1e  
20% >       0.46553746                 5#U*vGVT
 
10% >       0.50064115 n7S~nk  
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最后这个数值是MTF值呢，还是MTF的公差？ aGz<Yip  
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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？？？   LMvsYc~]q  
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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  : j0k"iv  
90% >       0.20977951                 AO9F.A<T5  
80% >       0.22748071                 C,w$)x5kls  
50% >       0.38667627                 `n7z+  
20% >       0.46553746                 ,2)LH'Xx  
10% >       0.50064115 }Y5Sf"~M  
....... H;<hmbN?d  

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6ZVJ2xs[%  
这些数值都是MTF值

Criterion           : Geometric MTF average S&T at 30.0000 cycles per mm   e.i5j^5u  
Mode                : Sensitivities rZZueYuXO  
Sampling            : 2 g!<@6\RB  
Nominal Criterion   : 0.54403234 )5Kzq6.  
Test Wavelength     : 0.6328 B5!$5Qc  
@Q3aJ98)2  
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？ c0u!V+V%  
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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