[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 Q!M)xNl/  
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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 M_``'gw  
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图片:2.jpg

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然后运行分析的结果如下： }xlKonk  
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Analysis of Tolerances Z v0C@r  
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File : E:\光学设计资料\zemax练习\f500.ZMX =w<v3wWN4  
Title: Zwe[_z!*D  
Date : TUE JUN 21 2011 Vj; vo`T  
7?)/>lx\>$  
Units are Millimeters.
N*DhjEU)[  
All changes are computed using linear differences. y7<&vIEC  
|)W!jC&k  
Paraxial Focus compensation only. r-w2\2  
fn9#>~vrD  
WARNING: Solves should be removed prior to tolerancing. TD04/ ISHT  
I"xWw/Ec  
Mnemonics: Y(GN4@`S  
TFRN: Tolerance on curvature in fringes. J<JBdk  
TTHI: Tolerance on thickness. J
fcMca  
TSDX: Tolerance on surface decentering in x. eSl-9 ^  
TSDY: Tolerance on surface decentering in y. -c
Nx1et  
TSTX: Tolerance on surface tilt in x (degrees). FoPginZ]J  
TSTY: Tolerance on surface tilt in y (degrees). G5Q!L;3HZ  
TIRR: Tolerance on irregularity (fringes). ~_!ts{[E  
TIND: Tolerance on Nd index of refraction. )%du@a8  
TEDX: Tolerance on element decentering in x. Vos?PqUi 4  
TEDY: Tolerance on element decentering in y. ;^l_i4A  
TETX: Tolerance on element tilt in x (degrees). fo\\o4Qyh  
TETY: Tolerance on element tilt in y (degrees). yZSvn[f  
2w?G.pO#  
WARNING: RAY AIMING IS OFF. Very loose tolerances may not be computed accurately. Xy#VQ{!  
t ,qul4y}  
WARNING: Boundary constraints on compensators will be ignored. T{*^_  
8U.$FMx :  
Criterion           : Geometric MTF average S&T at 30.0000 cycles per mm W81o"TR|pt  
Mode                : Sensitivities J"[3~&em  
Sampling            : 2 "+iAd.qd  
Nominal Criterion   : 0.54403234 @~jxG%y86  
Test Wavelength     : 0.6328 /aUFc'5  
2/tb6' =  
Jm![W8L  
Fields: XY Symmetric Angle in degrees E!aq?`-'!  
#      X-Field      Y-Field       Weight    VDX    VDY    VCX    VCY 2ALj}  
1   0.000E+000   0.000E+000   1.000E+000  0.000  0.000  0.000  0.000
Xyv8LB  
eX<K5K.B  
Sensitivity Analysis: w)S;J,Hv  
wL<j:>Ke[3  
                 |----------------- Minimum ----------------| |----------------- Maximum ----------------| -[.PH M6+?  
Type                      Value      Criterion        Change          Value      Criterion        Change '\*A"8;h  
Fringe tolerance on surface 1 C<he4n.  
TFRN   1            -1.00000000     0.54257256    -0.00145977     1.00000000     0.54548607     0.00145374 1<uwU(  
Change in Focus                :      -0.000000                            0.000000 o`%I{?UCDJ  
Fringe tolerance on surface 2 }(=ml7)v  
TFRN   2            -1.00000000     0.54177471    -0.00225762     1.00000000     0.54627463     0.00224230 |vy]8?Ak  
Change in Focus                :       0.000000                            0.000000 *1;23BiH-  
Fringe tolerance on surface 3 `=!p$hg($  
TFRN   3            -1.00000000     0.54779866     0.00376632     1.00000000     0.54022572    -0.00380662 rrQ0qg  
Change in Focus                :      -0.000000                            0.000000 `I>], J/  
Thickness tolerance on surface 1 6=>7M b$  
TTHI   1   3        -0.20000000     0.54321462    -0.00081772     0.20000000     0.54484759     0.00081525 6H;kJHn  
Change in Focus                :       0.000000                            0.000000 T|f_~#?eV  
Thickness tolerance on surface 2 tL8't]M,  
TTHI   2   3        -0.20000000     0.54478712     0.00075478     0.20000000     0.54327558    -0.00075675 o5#,\Y[ g  
Change in Focus                :       0.000000                           -0.000000 f-vK}'Z`,  
Decenter X tolerance on surfaces 1 through 3 0^>E`/  
TEDX   1   3        -0.20000000     0.54401464   -1.7700E-005     0.20000000     0.54401464   -1.7700E-005 *?Wtj  
Change in Focus                :       0.000000                            0.000000 hZ#\t  
Decenter Y tolerance on surfaces 1 through 3 GUCM4jVT^  
TEDY   1   3        -0.20000000     0.54401464   -1.7700E-005     0.20000000     0.54401464   -1.7700E-005 nx :)k-p_[  
Change in Focus                :       0.000000                            0.000000 A;%kl`~iyz  
Tilt X tolerance on surfaces 1 through 3 (degrees) yGV{^?yoP  
TETX   1   3        -0.20000000     0.54897548     0.00494314     0.20000000     0.54897548     0.00494314 u'@Ely  
Change in Focus                :       0.000000                            0.000000 tG 7+7Z=  
Tilt Y tolerance on surfaces 1 through 3 (degrees) t/Z!O z6ZE  
TETY   1   3        -0.20000000     0.54897548     0.00494314     0.20000000     0.54897548     0.00494314 <t6d)mJ%  
Change in Focus                :       0.000000                            0.000000 [i9[Mj  
Decenter X tolerance on surface 1 xL&PJ /'  
TSDX   1            -0.20000000     0.53999563    -0.00403671     0.20000000     0.53999563    -0.00403671 ~\bHfiIDy  
Change in Focus                :       0.000000                            0.000000 ,%='>A  
Decenter Y tolerance on surface 1 x=3I)}J(kn  
TSDY   1            -0.20000000     0.53999563    -0.00403671     0.20000000     0.53999563    -0.00403671 0HPO"x3-O  
Change in Focus                :       0.000000                            0.000000 #f9qlM32  
Tilt X tolerance on surface (degrees) 1 /a%KS3>V*  
TSTX   1            -0.20000000     0.42678383    -0.11724851     0.20000000     0.42678383    -0.11724851 I:/4t^%  
Change in Focus                :       0.000000                            0.000000 *08+\ed"#  
Tilt Y tolerance on surface (degrees) 1 5xv,!
/@  
TSTY   1            -0.20000000     0.42678383    -0.11724851     0.20000000     0.42678383    -0.11724851 Z`"n:'&  
Change in Focus                :       0.000000                            0.000000 3dU#Ueu  
Decenter X tolerance on surface 2 MVuP |&:n  
TSDX   2            -0.20000000     0.51705427    -0.02697807     0.20000000     0.51705427    -0.02697807 (6[Wr}SW5  
Change in Focus                :       0.000000                            0.000000 (lWKy9eTy`  
Decenter Y tolerance on surface 2 jhcuK:`L  
TSDY   2            -0.20000000     0.51705427    -0.02697807     0.20000000     0.51705427    -0.02697807 |bvGYsn_#=  
Change in Focus                :       0.000000                            0.000000 %((cFQ9  
Tilt X tolerance on surface (degrees) 2 )Jz!Ut  
TSTX   2            -0.20000000     0.35349910    -0.19053324     0.20000000     0.35349910    -0.19053324 cB36p&%  
Change in Focus                :       0.000000                            0.000000 '7=<#Blc  
Tilt Y tolerance on surface (degrees) 2 ?7 X3P  
TSTY   2            -0.20000000     0.35349910    -0.19053324     0.20000000     0.35349910    -0.19053324 I,z"_[^G  
Change in Focus                :       0.000000                            0.000000 "D!Dr1  
Decenter X tolerance on surface 3 dff#{  
TSDX   3            -0.20000000     0.53419039    -0.00984195     0.20000000     0.53419039    -0.00984195 'T{pdEn8u  
Change in Focus                :       0.000000                            0.000000 JSUzEAKe  
Decenter Y tolerance on surface 3 -sD:+Te  
TSDY   3            -0.20000000     0.53419039    -0.00984195     0.20000000     0.53419039    -0.00984195 rX)o3>q^?  
Change in Focus                :       0.000000                            0.000000 P ]_Vz  
Tilt X tolerance on surface (degrees) 3 `bi k/o=%  
TSTX   3            -0.20000000     0.42861670    -0.11541563     0.20000000     0.42861670    -0.11541563 e7wKjt2
fy  
Change in Focus                :       0.000000                            0.000000 t.u{.P\Md\  
Tilt Y tolerance on surface (degrees) 3 zPA>af~Ej  
TSTY   3            -0.20000000     0.42861670    -0.11541563     0.20000000     0.42861670    -0.11541563 X &09  
Change in Focus                :       0.000000                            0.000000 ;q^,[(8  
Irregularity of surface 1 in fringes b__n~\q_  
TIRR   1            -0.20000000     0.50973587    -0.03429647     0.20000000     0.57333868     0.02930634 ~vkud+r  
Change in Focus                :       0.000000                            0.000000 $$/S8LmmK  
Irregularity of surface 2 in fringes H;X~<WN&AW  
TIRR   2            -0.20000000     0.53400904    -0.01002330     0.20000000     0.55360281     0.00957047 _]Z$YM  
Change in Focus                :       0.000000                            0.000000 vkh;qPD  
Irregularity of surface 3 in fringes 5Wj5IS/  
TIRR   3            -0.20000000     0.58078982     0.03675748     0.20000000     0.49904394    -0.04498840 /.f!  
Change in Focus                :       0.000000                            0.000000 5M]6'X6I  
Index tolerance on surface 1 H.f9d.<W%  
TIND   1            -0.00100000     0.52606778    -0.01796456     0.00100000     0.56121811     0.01718578 hiT9H5 6>  
Change in Focus                :       0.000000                            0.000000 cRPr9LfD@  
Index tolerance on surface 2 vatx+)  
TIND   2            -0.00100000     0.55639086     0.01235852     0.00100000     0.53126361    -0.01276872 UfO'.8*v  
Change in Focus                :       0.000000                           -0.000000 %{c2lyw  
[29$~.m$Y  
Worst offenders: wN$uX#W|  
Type                      Value      Criterion        Change ..]B9M.  
TSTY   2            -0.20000000     0.35349910    -0.19053324 s')!<E+z\t  
TSTY   2             0.20000000     0.35349910    -0.19053324 %9cqJ]S  
TSTX   2            -0.20000000     0.35349910    -0.19053324 Q&tFv;1w6  
TSTX   2             0.20000000     0.35349910    -0.19053324 ]IL3$eR  
TSTY   1            -0.20000000     0.42678383    -0.11724851 Ab/v_mA;  
TSTY   1             0.20000000     0.42678383    -0.11724851 v UJ sFR  
TSTX   1            -0.20000000     0.42678383    -0.11724851 )vxVg*.Ee  
TSTX   1             0.20000000     0.42678383    -0.11724851 T`j  
TSTY   3            -0.20000000     0.42861670    -0.11541563 H74NU_  
TSTY   3             0.20000000     0.42861670    -0.11541563 ye9QTK6$,  
I*%&)Hj~  
Estimated Performance Changes based upon Root-Sum-Square method: oM m/!Dc  
Nominal MTF                 :     0.54403234 6eVe}V4W  
Estimated change            :    -0.36299231 &fh.w]\  
Estimated MTF               :     0.18104003 +*]SP@|IYI  
Q2??Kp]1  
Compensator Statistics: )GQD*b  
Change in back focus: e=|F(iW  
Minimum            :        -0.000000 )yfOrsM  
Maximum            :         0.000000 `=WzG"  
Mean               :        -0.000000 *T1L)Cp  
Standard Deviation :         0.000000 L+`}euu5  

5LnB]dW  
Monte Carlo Analysis: Y>c5:F;  
Number of trials: 20 PLlx~A  
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Initial Statistics: Normal Distribution a?f5(qW3  
Fvcq^uZ  
  Trial       Criterion        Change r5<e}t-  
      1     0.42804416    -0.11598818 rl_1),J\qG  
Change in Focus                :      -0.400171 4{1c7g  
      2     0.54384387    -0.00018847 +K @J*W 1  
Change in Focus                :       1.018470 Vz+=ZK r5  
      3     0.44510003    -0.09893230 t2`X!`  
Change in Focus                :      -0.601922 P
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      4     0.18154684    -0.36248550 `3H?*\<(
 
Change in Focus                :       0.920681 7zi^{]  
      5     0.28665820    -0.25737414 Ji)a%j1V9  
Change in Focus                :       1.253875 %t(, *;  
      6     0.21263372    -0.33139862 c>%z)uY>/  
Change in Focus                :      -0.903878 rYP8V >  
      7     0.40051424    -0.14351809 oC;l5v<  
Change in Focus                :      -1.354815 'ocwXyP,  
      8     0.48754161    -0.05649072 F\YcSDM  
Change in Focus                :       0.215922 M?:f^  
      9     0.40357468    -0.14045766 "fX8xZdS  
Change in Focus                :       0.281783 -+Awm{X_@  
     10     0.26315315    -0.28087919 'bQs_  
Change in Focus                :      -1.048393 bE%mgaOh  
     11     0.26120585    -0.28282649 ;Ln7_  
Change in Focus                :       1.017611 $rV:&A  
     12     0.24033815    -0.30369419 J_)z:`[yE  
Change in Focus                :      -0.109292 vf/$`IJ  
     13     0.37164046    -0.17239188 h1D~AgZOVj  
Change in Focus                :      -0.692430 ,T1XX2?:  
     14     0.48597489    -0.05805744 Z"PDOwj5  
Change in Focus                :      -0.662040 *=KexOa9  
     15     0.21462327    -0.32940907 (urfaZ;@+  
Change in Focus                :       1.611296 lMI ix0sSj  
     16     0.43378226    -0.11025008 e`gGzyM  
Change in Focus                :      -0.640081 LU 5 `!0m  
     17     0.39321881    -0.15081353 1Tts3O.  
Change in Focus                :       0.914906  Cq~ah  
     18     0.20692530    -0.33710703 kcZ;SYosj  
Change in Focus                :       0.801607 Rqd%#
v  
     19     0.51374068    -0.03029165 (J?}eb;>n  
Change in Focus                :       0.947293 _tR.RAaa"  
     20     0.38013374    -0.16389860 lpX p)r+  
Change in Focus                :       0.667010 `U?H^,FVA  
n?ZH2dI\0  
Number of traceable Monte Carlo files generated: 20 VNh,pQ(  
=G3J.S*Riy  
Nominal     0.54403234 ]!S)O|_D[  
Best        0.54384387    Trial     2 FZ'>LZ  
Worst       0.18154684    Trial     4 f%"_U'  
Mean        0.35770970 Wcay'#K,  
Std Dev     0.11156454 QP-<$P;~  
o^"d2=  
ezNE9g  
Compensator Statistics: 8b#Yd  
Change in back focus:  PtVN
G  
Minimum            :        -1.354815 |jCE9Ve#  
Maximum            :         1.611296 ]mGsNQ ].H  
Mean               :         0.161872 =Q8^@i4[&D  
Standard Deviation :         0.869664  } k%\  
N#6A>  
90% >       0.20977951               [HZCnO|N  
80% >       0.22748071               qh'f,#dI}  
50% >       0.38667627               F|3FvxA  
20% >       0.46553746               s }R:
q  
10% >       0.50064115                Xrzh*sp  
RX<^MzCDV  
End of Run. (nZ=9+j]d  
TB3T:A>2  
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 cB"F1~z  

图片:3.JPG

2g07wJ6x  
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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 GLcZ=6)"'  
f"=4,  
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                 Pds*M?&F  
80% >       0.22748071                 s6hWq&C  
50% >       0.38667627                 }AfPBfgC1z  
20% >       0.46553746                 {3uSg)  
10% >       0.50064115 X@4d~6k?  
l@F e(^5E  
最后这个数值是MTF值呢，还是MTF的公差？ |g^W @.P  
C>;8`6_!gU  
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？？？   iiDkk  
fJlN'F7  
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  : e]fC!>w(\  
90% >       0.20977951                 []^>QsS(X  
80% >       0.22748071                 B ~GyS"  
50% >       0.38667627                 '|r!yAO6  
20% >       0.46553746                 *~X\c Z  
10% >       0.50064115 46`{mPd{aO  
....... w]XBq~KO  

<O&s 'A[  
nTlrG6  
这些数值都是MTF值

Criterion           : Geometric MTF average S&T at 30.0000 cycles per mm   !;oBvE7Kh  
Mode                : Sensitivities pTd@i1%Nr  
Sampling            : 2 }wKU=Vm  
Nominal Criterion   : 0.54403234 [rem,i+  
Test Wavelength     : 0.6328 <L0_<T  
E2cmT$6  
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？ Z~<V>b  
F
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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