[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 }_cX" s  
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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 gK-$y9]~+  
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图片:2.jpg

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然后运行分析的结果如下： 4CioVQdj  
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Analysis of Tolerances Rs1JCP=d8  
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File : E:\光学设计资料\zemax练习\f500.ZMX F$>^pw  
Title: S
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Date : TUE JUN 21 2011 mX QVL.P\  
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Units are Millimeters. <Z9N}wY,8  
All changes are computed using linear differences. HXRK<6k$  
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Paraxial Focus compensation only. YDo,9  
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WARNING: Solves should be removed prior to tolerancing. Mj-B;r  
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Mnemonics: .g95E<bd  
TFRN: Tolerance on curvature in fringes. *61G<I  
TTHI: Tolerance on thickness. }TAHVcX*p  
TSDX: Tolerance on surface decentering in x. X4:SH>U!  
TSDY: Tolerance on surface decentering in y. 9_\1cSk'  
TSTX: Tolerance on surface tilt in x (degrees). [[9XqD]  
TSTY: Tolerance on surface tilt in y (degrees). nXcOFU  
TIRR: Tolerance on irregularity (fringes). tz"zQC$  
TIND: Tolerance on Nd index of refraction.
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TEDX: Tolerance on element decentering in x. +UC-  
TEDY: Tolerance on element decentering in y. 00(#_($  
TETX: Tolerance on element tilt in x (degrees). lhhp6-r  
TETY: Tolerance on element tilt in y (degrees). U4$CkTe2Y  
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WARNING: RAY AIMING IS OFF. Very loose tolerances may not be computed accurately. *L~88-V^  
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WARNING: Boundary constraints on compensators will be ignored. G/5]0]SO  
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Criterion           : Geometric MTF average S&T at 30.0000 cycles per mm )nJh) {4\  
Mode                : Sensitivities .f]2%utHB  
Sampling            : 2 ?.b.mkJ  
Nominal Criterion   : 0.54403234 7e D<(  
Test Wavelength     : 0.6328 }X[wWH  
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Fields: XY Symmetric Angle in degrees 8q#Be1u<s2  
#      X-Field      Y-Field       Weight    VDX    VDY    VCX    VCY 9Wi+7_)  
1   0.000E+000   0.000E+000   1.000E+000  0.000  0.000  0.000  0.000 vx8-~Oq{|;  
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Sensitivity Analysis: p[M*<==4  
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                 |----------------- Minimum ----------------| |----------------- Maximum ----------------| pJ 7="
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Type                      Value      Criterion        Change          Value      Criterion        Change -{'WIGm  
Fringe tolerance on surface 1 xnm!$ $W  
TFRN   1            -1.00000000     0.54257256    -0.00145977     1.00000000     0.54548607     0.00145374 W6[# q%o  
Change in Focus                :      -0.000000                            0.000000 b#[7A  
Fringe tolerance on surface 2 4Sxt<7[f  
TFRN   2            -1.00000000     0.54177471    -0.00225762     1.00000000     0.54627463     0.00224230 8h| 9;%  
Change in Focus                :       0.000000                            0.000000 ?h4Rh0rkX  
Fringe tolerance on surface 3 $9Yk]~  
TFRN   3            -1.00000000     0.54779866     0.00376632     1.00000000     0.54022572    -0.00380662 <X,0\U!lL  
Change in Focus                :      -0.000000                            0.000000 NN;'QiE  
Thickness tolerance on surface 1 79JU  
TTHI   1   3        -0.20000000     0.54321462    -0.00081772     0.20000000     0.54484759     0.00081525 ai,Nx:r   
Change in Focus                :       0.000000                            0.000000 -N]%)Hy  
Thickness tolerance on surface 2 k^Q>  
TTHI   2   3        -0.20000000     0.54478712     0.00075478     0.20000000     0.54327558    -0.00075675 ayvHS&h  
Change in Focus                :       0.000000                           -0.000000 /Sag_[i  
Decenter X tolerance on surfaces 1 through 3 "dO>P*k,  
TEDX   1   3        -0.20000000     0.54401464   -1.7700E-005     0.20000000     0.54401464   -1.7700E-005 >^fkHbgNQ  
Change in Focus                :       0.000000                            0.000000 4Cdl^4(LT  
Decenter Y tolerance on surfaces 1 through 3 8QYM/yAM  
TEDY   1   3        -0.20000000     0.54401464   -1.7700E-005     0.20000000     0.54401464   -1.7700E-005 >X"V  
Change in Focus                :       0.000000                            0.000000 xfyUT^  
Tilt X tolerance on surfaces 1 through 3 (degrees) *3>$f.
QU  
TETX   1   3        -0.20000000     0.54897548     0.00494314     0.20000000     0.54897548     0.00494314 K^'NG!  
Change in Focus                :       0.000000                            0.000000 c/q -WEKL  
Tilt Y tolerance on surfaces 1 through 3 (degrees) O$Z<R:vVA  
TETY   1   3        -0.20000000     0.54897548     0.00494314     0.20000000     0.54897548     0.00494314 T8ftBIOi  
Change in Focus                :       0.000000                            0.000000 ]7ZY|fP2  
Decenter X tolerance on surface 1 f\~OG#AaX  
TSDX   1            -0.20000000     0.53999563    -0.00403671     0.20000000     0.53999563    -0.00403671 3\Ma)\>R\-  
Change in Focus                :       0.000000                            0.000000 C3p/|{TP  
Decenter Y tolerance on surface 1 B
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TSDY   1            -0.20000000     0.53999563    -0.00403671     0.20000000     0.53999563    -0.00403671 `>mT/Rmb@  
Change in Focus                :       0.000000                            0.000000 tb@&!a$`?  
Tilt X tolerance on surface (degrees) 1 psHW(Z8G  
TSTX   1            -0.20000000     0.42678383    -0.11724851     0.20000000     0.42678383    -0.11724851 C/{tvY /o  
Change in Focus                :       0.000000                            0.000000 f(o1J|U{  
Tilt Y tolerance on surface (degrees) 1 },G>+ s8h  
TSTY   1            -0.20000000     0.42678383    -0.11724851     0.20000000     0.42678383    -0.11724851 3:;2Av2(X.  
Change in Focus                :       0.000000                            0.000000 UmRI! WQl  
Decenter X tolerance on surface 2 X-&U-S;  
TSDX   2            -0.20000000     0.51705427    -0.02697807     0.20000000     0.51705427    -0.02697807 V!Q1o!J  
Change in Focus                :       0.000000                            0.000000 -`
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Decenter Y tolerance on surface 2
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TSDY   2            -0.20000000     0.51705427    -0.02697807     0.20000000     0.51705427    -0.02697807 C/w!Y)nB=  
Change in Focus                :       0.000000                            0.000000 xxlYn9ke  
Tilt X tolerance on surface (degrees) 2 )+nY-DB(  
TSTX   2            -0.20000000     0.35349910    -0.19053324     0.20000000     0.35349910    -0.19053324 #l!Sz247  
Change in Focus                :       0.000000                            0.000000 6H\apgHm  
Tilt Y tolerance on surface (degrees) 2 Uu9*nH_  
TSTY   2            -0.20000000     0.35349910    -0.19053324     0.20000000     0.35349910    -0.19053324 C)r!;u)AZH  
Change in Focus                :       0.000000                            0.000000 &!lGx7zf  
Decenter X tolerance on surface 3 h* to%N  
TSDX   3            -0.20000000     0.53419039    -0.00984195     0.20000000     0.53419039    -0.00984195 >%~%O`+  
Change in Focus                :       0.000000                            0.000000 ?1z." &  
Decenter Y tolerance on surface 3 `]{/(pIgW;  
TSDY   3            -0.20000000     0.53419039    -0.00984195     0.20000000     0.53419039    -0.00984195 Q]q`+
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Change in Focus                :       0.000000                            0.000000
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Tilt X tolerance on surface (degrees) 3 -|l^- Qf!  
TSTX   3            -0.20000000     0.42861670    -0.11541563     0.20000000     0.42861670    -0.11541563 }BpCa6SAs  
Change in Focus                :       0.000000                            0.000000 JDyP..Dt  
Tilt Y tolerance on surface (degrees) 3 ,c%>M^d  
TSTY   3            -0.20000000     0.42861670    -0.11541563     0.20000000     0.42861670    -0.11541563 WzC_M>_  
Change in Focus                :       0.000000                            0.000000 ~9OART='  
Irregularity of surface 1 in fringes kAEm#oz=g  
TIRR   1            -0.20000000     0.50973587    -0.03429647     0.20000000     0.57333868     0.02930634 yX:*TK4  
Change in Focus                :       0.000000                            0.000000 uH}cvshv  
Irregularity of surface 2 in fringes 1HF=,K+  
TIRR   2            -0.20000000     0.53400904    -0.01002330     0.20000000     0.55360281     0.00957047 Ighd,G-  
Change in Focus                :       0.000000                            0.000000 /GK1}h  
Irregularity of surface 3 in fringes 5,0fL  
TIRR   3            -0.20000000     0.58078982     0.03675748     0.20000000     0.49904394    -0.04498840 i 
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Change in Focus                :       0.000000                            0.000000 p#~Dq(Q  
Index tolerance on surface 1 |g3a1El  
TIND   1            -0.00100000     0.52606778    -0.01796456     0.00100000     0.56121811     0.01718578 RN0@Q~oTI  
Change in Focus                :       0.000000                            0.000000 ccUq
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Index tolerance on surface 2 w!0`JPu  
TIND   2            -0.00100000     0.55639086     0.01235852     0.00100000     0.53126361    -0.01276872 Wgt[ACioN  
Change in Focus                :       0.000000                           -0.000000 +w ;2kw  
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Worst offenders: 3
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Type                      Value      Criterion        Change C0xjM0  
TSTY   2            -0.20000000     0.35349910    -0.19053324 q F\a]e  
TSTY   2             0.20000000     0.35349910    -0.19053324 !+;'kI2  
TSTX   2            -0.20000000     0.35349910    -0.19053324 ~>af"<  
TSTX   2             0.20000000     0.35349910    -0.19053324 bp06xHMu  
TSTY   1            -0.20000000     0.42678383    -0.11724851 q1Ja*=r  
TSTY   1             0.20000000     0.42678383    -0.11724851 : GZx-   
TSTX   1            -0.20000000     0.42678383    -0.11724851 $nB4Ie!WcR  
TSTX   1             0.20000000     0.42678383    -0.11724851 H1]An'qz,  
TSTY   3            -0.20000000     0.42861670    -0.11541563 
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TSTY   3             0.20000000     0.42861670    -0.11541563 LRqBP|bjCD  
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Estimated Performance Changes based upon Root-Sum-Square method: (p2jigP7a[  
Nominal MTF                 :     0.54403234 
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Estimated change            :    -0.36299231 nM+(  
Estimated MTF               :     0.18104003 9oly=&lJ  
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Compensator Statistics: vZHm'  
Change in back focus: `u%`Nj  
Minimum            :        -0.000000 [ 7W@/qqv  
Maximum            :         0.000000 5",@!1ju  
Mean               :        -0.000000 *C~O[:6D  
Standard Deviation :         0.000000 (x{
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Monte Carlo Analysis: \/3Xb  
Number of trials: 20 >tfy\PY:  
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Initial Statistics: Normal Distribution  aKkG[qN  
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  Trial       Criterion        Change dqU bJc]  
      1     0.42804416    -0.11598818 .w/_Om4T*b  
Change in Focus                :      -0.400171 eIEr\X4\~~  
      2     0.54384387    -0.00018847 iez@j  
Change in Focus                :       1.018470 S]kY'(V(*  
      3     0.44510003    -0.09893230 -r%3"C=m  
Change in Focus                :      -0.601922 H pHXt78  
      4     0.18154684    -0.36248550 1(z&0Y;  
Change in Focus                :       0.920681 :zXkQQD8`  
      5     0.28665820    -0.25737414 fVlTsc|e  
Change in Focus                :       1.253875 A %iZ_h^  
      6     0.21263372    -0.33139862 5&WYL  
Change in Focus                :      -0.903878 ={[
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      7     0.40051424    -0.14351809 Q`nsL)J  
Change in Focus                :      -1.354815 "0JG96&\  
      8     0.48754161    -0.05649072 3snr-)   
Change in Focus                :       0.215922 F]e]  
      9     0.40357468    -0.14045766 #7!P3j  
Change in Focus                :       0.281783 w)A@  
     10     0.26315315    -0.28087919 ^l}Esz`-M  
Change in Focus                :      -1.048393 -e6
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     11     0.26120585    -0.28282649 O?<R.W<QI  
Change in Focus                :       1.017611 )/BI
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     12     0.24033815    -0.30369419 ?!R Z~~d  
Change in Focus                :      -0.109292 V87?J w%2  
     13     0.37164046    -0.17239188 YGRv``(  
Change in Focus                :      -0.692430 J7FCW^-`3  
     14     0.48597489    -0.05805744 DH(Qmd  
Change in Focus                :      -0.662040 OR4ZjogzY  
     15     0.21462327    -0.32940907 02U5N(s  
Change in Focus                :       1.611296 5$kv,%ah  
     16     0.43378226    -0.11025008 r;gtfX*  
Change in Focus                :      -0.640081 1Ner1EKGp  
     17     0.39321881    -0.15081353 dac?b(  
Change in Focus                :       0.914906 {ZiZ$itf  
     18     0.20692530    -0.33710703 RrMC[2=  
Change in Focus                :       0.801607 }!tJ
3G  
     19     0.51374068    -0.03029165 a!Z.Z
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Change in Focus                :       0.947293 `~zY!sK  
     20     0.38013374    -0.16389860 A^/$|@  
Change in Focus                :       0.667010 "I"(yiKD  
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Number of traceable Monte Carlo files generated: 20 [ugBVnma  
5

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Nominal     0.54403234 *h=|KOS  
Best        0.54384387    Trial     2 a<-'4D/  
Worst       0.18154684    Trial     4 >Ux5UD  
Mean        0.35770970 @lo6?9oNo  
Std Dev     0.11156454 +b<q4W  
xHs8']*
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^a=,,6T  
Compensator Statistics: +9S_H(  
Change in back focus: O gQE1{C  
Minimum            :        -1.354815 bERYC|  
Maximum            :         1.611296 ?
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Mean               :         0.161872 JgI+k Nx  
Standard Deviation :         0.869664 y#[PQT  
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90% >       0.20977951               3*13XQ  
80% >       0.22748071               1aC?*,e?  
50% >       0.38667627               7O3\  
20% >       0.46553746               giU6f!%  
10% >       0.50064115                "xS?#^a  
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End of Run. Vx1xULdY  
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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 B(
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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 'je=.{[lWt  
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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                 -P+( =U  
80% >       0.22748071                 }0Isi G  
50% >       0.38667627                 kJP fL s  
20% >       0.46553746                 "y@B|  
10% >       0.50064115 B6tp,Np5,  
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最后这个数值是MTF值呢，还是MTF的公差？ &E.ckWf  
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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？？？   6AgevyVG  
>U@7xeK  
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  : ~`M>&E@Y_/  
90% >       0.20977951                 .8[B }S(  
80% >       0.22748071                 EMME?OW$  
50% >       0.38667627                 e<s56<3j  
20% >       0.46553746                 %''z~LzJ8  
10% >       0.50064115 4Eh 2sI  
....... 8%OS ,Z  

|r*btyOJk  
yNVuSj  
这些数值都是MTF值

Criterion           : Geometric MTF average S&T at 30.0000 cycles per mm   z[:UPPbW  
Mode                : Sensitivities 1;E[Ml  
Sampling            : 2 4?YhqJ  
Nominal Criterion   : 0.54403234 /VB n  
Test Wavelength     : 0.6328 OMG.64DX .  
@a,X{0  
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？ xzF@v>2S+  
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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