[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  jK]1X8  
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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 yiC7)=  
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图片:2.jpg

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然后运行分析的结果如下： 15Mtlb  
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Analysis of Tolerances HS{Vohy>  
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File : E:\光学设计资料\zemax练习\f500.ZMX Uc {m##!  
Title: v f{{z%3T  
Date : TUE JUN 21 2011 zG6l8%q'UE  
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Units are Millimeters. s{'Sl{-Eu  
All changes are computed using linear differences. {sC Ni  
G5/A{1sz&  
Paraxial Focus compensation only. /ki-Tha  
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WARNING: Solves should be removed prior to tolerancing. ^BA%]pe$I  
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Mnemonics: w/m@(EBK  
TFRN: Tolerance on curvature in fringes. jjj<B
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TTHI: Tolerance on thickness. :IS?si5|  
TSDX: Tolerance on surface decentering in x. R#4l"  
TSDY: Tolerance on surface decentering in y. rV%T+!n%c  
TSTX: Tolerance on surface tilt in x (degrees). l5Bm.H_  
TSTY: Tolerance on surface tilt in y (degrees). <N=k&\  
TIRR: Tolerance on irregularity (fringes). /o;L,mcx*  
TIND: Tolerance on Nd index of refraction. 9hIKx:XCg  
TEDX: Tolerance on element decentering in x. .<`)`:n+B  
TEDY: Tolerance on element decentering in y. z:#]P0  
TETX: Tolerance on element tilt in x (degrees). )DXt_leLg  
TETY: Tolerance on element tilt in y (degrees). /"gRyv  
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WARNING: RAY AIMING IS OFF. Very loose tolerances may not be computed accurately. W|>jj$/o  
XY'8oU`]{  
WARNING: Boundary constraints on compensators will be ignored. bzNnEH`^]  
Z2$_9.  
Criterion           : Geometric MTF average S&T at 30.0000 cycles per mm <x^$Fu
 
Mode                : Sensitivities fI)XV7,X  
Sampling            : 2 3s!6rT_=)d  
Nominal Criterion   : 0.54403234 1PwtzH.w  
Test Wavelength     : 0.6328 b}R_@_<u  
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+QFKaS<sn  
Fields: XY Symmetric Angle in degrees FQ<x(&/NF  
#      X-Field      Y-Field       Weight    VDX    VDY    VCX    VCY C{J5:ak  
1   0.000E+000   0.000E+000   1.000E+000  0.000  0.000  0.000  0.000 hUlRtt  
AfTm#-R  
Sensitivity Analysis: et 1HbX  
o7!A(Eu  
                 |----------------- Minimum ----------------| |----------------- Maximum ----------------| IEy$2f>Ns  
Type                      Value      Criterion        Change          Value      Criterion        Change zas&gsl-;  
Fringe tolerance on surface 1 kT@ITA22  
TFRN   1            -1.00000000     0.54257256    -0.00145977     1.00000000     0.54548607     0.00145374 o&1mX  
Change in Focus                :      -0.000000                            0.000000 ; CCg]hX  
Fringe tolerance on surface 2 , lR(5ZI  
TFRN   2            -1.00000000     0.54177471    -0.00225762     1.00000000     0.54627463     0.00224230 kS-BB[T  
Change in Focus                :       0.000000                            0.000000 ta)gOc)r R  
Fringe tolerance on surface 3 gFTU9k<  
TFRN   3            -1.00000000     0.54779866     0.00376632     1.00000000     0.54022572    -0.00380662 ]%6%rq%9C  
Change in Focus                :      -0.000000                            0.000000 .4CDQ&B0K  
Thickness tolerance on surface 1 oDA'$]UL  
TTHI   1   3        -0.20000000     0.54321462    -0.00081772     0.20000000     0.54484759     0.00081525 V|'@D#\  
Change in Focus                :       0.000000                            0.000000 SiaNL:  
Thickness tolerance on surface 2 0vqH-)}  
TTHI   2   3        -0.20000000     0.54478712     0.00075478     0.20000000     0.54327558    -0.00075675 u;q Q/Ftb  
Change in Focus                :       0.000000                           -0.000000 #7O7O~  
Decenter X tolerance on surfaces 1 through 3 $\P/ %eP  
TEDX   1   3        -0.20000000     0.54401464   -1.7700E-005     0.20000000     0.54401464   -1.7700E-005 bPOPoq1#  
Change in Focus                :       0.000000                            0.000000 daKZ*B|  
Decenter Y tolerance on surfaces 1 through 3 #'&-S@/nQs  
TEDY   1   3        -0.20000000     0.54401464   -1.7700E-005     0.20000000     0.54401464   -1.7700E-005 ` 7iA?;  
Change in Focus                :       0.000000                            0.000000 #g6_)B=S  
Tilt X tolerance on surfaces 1 through 3 (degrees) UJ}}H}{  
TETX   1   3        -0.20000000     0.54897548     0.00494314     0.20000000     0.54897548     0.00494314 *1dZs~_  
Change in Focus                :       0.000000                            0.000000 $l7}e=1
 
Tilt Y tolerance on surfaces 1 through 3 (degrees) \7LL neq  
TETY   1   3        -0.20000000     0.54897548     0.00494314     0.20000000     0.54897548     0.00494314 MM32\}Y6  
Change in Focus                :       0.000000                            0.000000 V4Rs  
Decenter X tolerance on surface 1 Sn-#Y(>]o0  
TSDX   1            -0.20000000     0.53999563    -0.00403671     0.20000000     0.53999563    -0.00403671 IE\RP!  
Change in Focus                :       0.000000                            0.000000 nN{DO:_o  
Decenter Y tolerance on surface 1 #!Cg$6%x9  
TSDY   1            -0.20000000     0.53999563    -0.00403671     0.20000000     0.53999563    -0.00403671 )W\)kDh!  
Change in Focus                :       0.000000                            0.000000 %DiQTg7V,  
Tilt X tolerance on surface (degrees) 1 Wm
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TSTX   1            -0.20000000     0.42678383    -0.11724851     0.20000000     0.42678383    -0.11724851
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Change in Focus                :       0.000000                            0.000000 Hj >fg2/  
Tilt Y tolerance on surface (degrees) 1 3J"`mQ  
TSTY   1            -0.20000000     0.42678383    -0.11724851     0.20000000     0.42678383    -0.11724851 (>0`e8v!  
Change in Focus                :       0.000000                            0.000000 wetu.aMp  
Decenter X tolerance on surface 2 B@-\.m  
TSDX   2            -0.20000000     0.51705427    -0.02697807     0.20000000     0.51705427    -0.02697807 |2^mCL.r  
Change in Focus                :       0.000000                            0.000000 = cxO@Fu  
Decenter Y tolerance on surface 2 ti+e U$  
TSDY   2            -0.20000000     0.51705427    -0.02697807     0.20000000     0.51705427    -0.02697807 ?/&X_O  
Change in Focus                :       0.000000                            0.000000 Nt8"6k_  
Tilt X tolerance on surface (degrees) 2 *
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TSTX   2            -0.20000000     0.35349910    -0.19053324     0.20000000     0.35349910    -0.19053324 N#M>2b<A/T  
Change in Focus                :       0.000000                            0.000000 ia\Gmh  
Tilt Y tolerance on surface (degrees) 2 X40gJV<  
TSTY   2            -0.20000000     0.35349910    -0.19053324     0.20000000     0.35349910    -0.19053324 |gA@$1+}  
Change in Focus                :       0.000000                            0.000000 "T5jz#H#/  
Decenter X tolerance on surface 3 zKP[]S-  
TSDX   3            -0.20000000     0.53419039    -0.00984195     0.20000000     0.53419039    -0.00984195 TE&E f$h  
Change in Focus                :       0.000000                            0.000000 3|$?T|#B  
Decenter Y tolerance on surface 3 &G%AQpDW5  
TSDY   3            -0.20000000     0.53419039    -0.00984195     0.20000000     0.53419039    -0.00984195 ;0WAfu}#H  
Change in Focus                :       0.000000                            0.000000 "-S!^h/v  
Tilt X tolerance on surface (degrees) 3 "#wAGlH6>  
TSTX   3            -0.20000000     0.42861670    -0.11541563     0.20000000     0.42861670    -0.11541563 Ut~YvWc9  
Change in Focus                :       0.000000                            0.000000 )b nGZ8h99  
Tilt Y tolerance on surface (degrees) 3 ^kNVQJiZyG  
TSTY   3            -0.20000000     0.42861670    -0.11541563     0.20000000     0.42861670    -0.11541563 x%X3FbF]  
Change in Focus                :       0.000000                            0.000000 LF.i0^#J
 
Irregularity of surface 1 in fringes A(&\wd  
TIRR   1            -0.20000000     0.50973587    -0.03429647     0.20000000     0.57333868     0.02930634 yzfiH4  
Change in Focus                :       0.000000                            0.000000 ;VCV%=W<  
Irregularity of surface 2 in fringes 1<@lM8&.kO  
TIRR   2            -0.20000000     0.53400904    -0.01002330     0.20000000     0.55360281     0.00957047 Lb$Uba-_  
Change in Focus                :       0.000000                            0.000000 s8(Z&pQ  
Irregularity of surface 3 in fringes XzV>q~I3|E  
TIRR   3            -0.20000000     0.58078982     0.03675748     0.20000000     0.49904394    -0.04498840 MDa[bQNM  
Change in Focus                :       0.000000                            0.000000 }%wP^6G*x\  
Index tolerance on surface 1 P:6K  
TIND   1            -0.00100000     0.52606778    -0.01796456     0.00100000     0.56121811     0.01718578 =z5=?  
Change in Focus                :       0.000000                            0.000000 #p=+RTZ<  
Index tolerance on surface 2 # d"M(nt  
TIND   2            -0.00100000     0.55639086     0.01235852     0.00100000     0.53126361    -0.01276872 {!( htg;  
Change in Focus                :       0.000000                           -0.000000 !(bYh`Uy  
CPa+?__B  
Worst offenders: mu0L_u(P  
Type                      Value      Criterion        Change >7a ENKOg:  
TSTY   2            -0.20000000     0.35349910    -0.19053324 <EyJ $$  
TSTY   2             0.20000000     0.35349910    -0.19053324 &z3_N  
TSTX   2            -0.20000000     0.35349910    -0.19053324 7oLlRU  
TSTX   2             0.20000000     0.35349910    -0.19053324 ~*h)`uM  
TSTY   1            -0.20000000     0.42678383    -0.11724851 u@Gum|_=N
 
TSTY   1             0.20000000     0.42678383    -0.11724851 71Q`B#t0'Z  
TSTX   1            -0.20000000     0.42678383    -0.11724851 5D3&E_S  
TSTX   1             0.20000000     0.42678383    -0.11724851 q:>`|~M
X  
TSTY   3            -0.20000000     0.42861670    -0.11541563 fC^d@4ha  
TSTY   3             0.20000000     0.42861670    -0.11541563 T:Q+ Z }v+  
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Estimated Performance Changes based upon Root-Sum-Square method: fc:87ZR{K  
Nominal MTF                 :     0.54403234 6/QWzw.0c  
Estimated change            :    -0.36299231 hQ%X0X,  
Estimated MTF               :     0.18104003 sk5=$My  
9&
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Compensator Statistics: %\v  
Change in back focus: 2hntQ1[  
Minimum            :        -0.000000 zGO_S\  
Maximum            :         0.000000 #/(L.5d[  
Mean               :        -0.000000 pkIQ,W{Ke  
Standard Deviation :         0.000000 8oHIXnK  
9%k4Ic%P  
Monte Carlo Analysis: *s1o?'e  
Number of trials: 20 LUx'Dm"  
?~^p:T  
Initial Statistics: Normal Distribution k?pNmKVJM  
V[44aN  
  Trial       Criterion        Change z,qNuv"W  
      1     0.42804416    -0.11598818 DS|x*w'I  
Change in Focus                :      -0.400171 pdQaVe7tRo  
      2     0.54384387    -0.00018847 2Sy:wt  
Change in Focus                :       1.018470 f:t5`c.  
      3     0.44510003    -0.09893230 >&Ye(3w&  
Change in Focus                :      -0.601922 E
xi#@-  
      4     0.18154684    -0.36248550 T/L\|_:'  
Change in Focus                :       0.920681 @ bvWqMa  
      5     0.28665820    -0.25737414 Q Na*Y@i  
Change in Focus                :       1.253875 `EP-Qlm  
      6     0.21263372    -0.33139862 A?ESjMy(R  
Change in Focus                :      -0.903878 1{xkAy0  
      7     0.40051424    -0.14351809 zS\m
8[+]  
Change in Focus                :      -1.354815 dZJU>o'BG  
      8     0.48754161    -0.05649072 wGz_IL.D  
Change in Focus                :       0.215922 jN+2+P%OL  
      9     0.40357468    -0.14045766 p{V(! v|  
Change in Focus                :       0.281783 '~6l 6wi  
     10     0.26315315    -0.28087919 /{ 8.Jcx$  
Change in Focus                :      -1.048393 Zg])uM]\2i  
     11     0.26120585    -0.28282649 '#r^W2  
Change in Focus                :       1.017611 x6yO2Yo  
     12     0.24033815    -0.30369419 a'G[!"  
Change in Focus                :      -0.109292 H,fVF837  
     13     0.37164046    -0.17239188 uvD*]zX  
Change in Focus                :      -0.692430 n*=Tm KQ  
     14     0.48597489    -0.05805744 'xOH~RlE
 
Change in Focus                :      -0.662040 ,+_gx.H2j  
     15     0.21462327    -0.32940907 U%2{PbL  
Change in Focus                :       1.611296 zt )WX9  
     16     0.43378226    -0.11025008 _ZuI x=!  
Change in Focus                :      -0.640081 i\L7z)u
 
     17     0.39321881    -0.15081353 0?g&<q  
Change in Focus                :       0.914906 y*sqnzgF  
     18     0.20692530    -0.33710703 'Ya-;5Y]  
Change in Focus                :       0.801607 X0m6<q  
     19     0.51374068    -0.03029165 cmLI!"RLe  
Change in Focus                :       0.947293 6}mSA@4&  
     20     0.38013374    -0.16389860 wMiRN2\^  
Change in Focus                :       0.667010 Uv3Fe%>  
-F-,
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Number of traceable Monte Carlo files generated: 20 i ;YRE&X  
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Nominal     0.54403234
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Best        0.54384387    Trial     2 nqujT8  
Worst       0.18154684    Trial     4 O%s?64^U  
Mean        0.35770970 }Mh`j$  
Std Dev     0.11156454 /%)x!dmy  
!L'O")!3  
^d/,9L\U  
Compensator Statistics: }D#[yE,=\  
Change in back focus: 0bMbM^xV6  
Minimum            :        -1.354815 yCye3z.  
Maximum            :         1.611296 Zv1/J}+  
Mean               :         0.161872 BO=j*.YKy  
Standard Deviation :         0.869664 Q%RI;;YyA  
IQ}YF]I;  
90% >       0.20977951               ZGWZ2>k
  
80% >       0.22748071               wo!;Bxo N  
50% >       0.38667627               d[Rs  
20% >       0.46553746               u*H V  
10% >       0.50064115                c:z<8#A}  
*}`D2_uP  
End of Run. *Ry "`"  
Uv/?/;si  
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 ,n+~S^r  

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 |zSoA=7?  
FZhjI 8+,~  
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                 v'zf*]9  
80% >       0.22748071                 PXYo@^ 3  
50% >       0.38667627                 *aF
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20% >       0.46553746                 6+[7UH~pm^  
10% >       0.50064115 9>"To  
7EAkY`Op  
最后这个数值是MTF值呢，还是MTF的公差？  "Aq-H g  
lE?F Wt  
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？？？   4^O'K;$leD  
"xV9$m>
 
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  : |/g\N,]  
90% >       0.20977951                 j+n1k^jC  
80% >       0.22748071                 )ll`F7B-  
50% >       0.38667627                 >Z?3dM~[  
20% >       0.46553746                 J*8fGR%  
10% >       0.50064115 /0 ,#c2aq  
....... tLpDIA_8  

`?Wak=]g  
B_[^<2_  
这些数值都是MTF值

Criterion           : Geometric MTF average S&T at 30.0000 cycles per mm   #zXkg[J6d  
Mode                : Sensitivities QhK]>d.  
Sampling            : 2 R\+p`n$  
Nominal Criterion   : 0.54403234 Hq^sU%  
Test Wavelength     : 0.6328 U]fE(mpI9  
rZZueYuXO  
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？ bxO8q57  
&`<j!xlG  
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