[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 .v$D13L(o  
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然后添加了默认公差分析，基本没变 /Y'Vh^9/T  
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然后运行分析的结果如下： BsEF'h'Owh  
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Analysis of Tolerances 8>0e*jC  
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File : E:\光学设计资料\zemax练习\f500.ZMX z"0I>gl  
Title: 1UE6 4Kl:S  
Date : TUE JUN 21 2011 `-3Ow[  
pov)Z):}G<  
Units are Millimeters. S"xKL{5  
All changes are computed using linear differences. qWOD
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Paraxial Focus compensation only. _NMm/]mN /  
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WARNING: Solves should be removed prior to tolerancing. B oC5E#;G  
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Mnemonics: !t gi  
TFRN: Tolerance on curvature in fringes. UazP6^{L  
TTHI: Tolerance on thickness. DP3PYJ%+B  
TSDX: Tolerance on surface decentering in x. hJZV}a|  
TSDY: Tolerance on surface decentering in y. PK0%g$0  
TSTX: Tolerance on surface tilt in x (degrees). ^-,xE>3o  
TSTY: Tolerance on surface tilt in y (degrees). Bs O+NP  
TIRR: Tolerance on irregularity (fringes). 6f\Lf?vF  
TIND: Tolerance on Nd index of refraction. wS%Q<uK  
TEDX: Tolerance on element decentering in x. R)mu2^  
TEDY: Tolerance on element decentering in y. =5kY6%E7c  
TETX: Tolerance on element tilt in x (degrees).
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TETY: Tolerance on element tilt in y (degrees). w-Da~[J  
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WARNING: RAY AIMING IS OFF. Very loose tolerances may not be computed accurately. pKit~A,Q  
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WARNING: Boundary constraints on compensators will be ignored. YbTxn="_  
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Criterion           : Geometric MTF average S&T at 30.0000 cycles per mm .=X}cJ]`[  
Mode                : Sensitivities >D(RYI  
Sampling            : 2 DV<` K$ET  
Nominal Criterion   : 0.54403234 ,u`B<heoLU  
Test Wavelength     : 0.6328 C/TF-g-_Y  
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1 D<_
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Fields: XY Symmetric Angle in degrees cp#JBHO  
#      X-Field      Y-Field       Weight    VDX    VDY    VCX    VCY ha(Z<  
1   0.000E+000   0.000E+000   1.000E+000  0.000  0.000  0.000  0.000 (2:/8\_P  
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Sensitivity Analysis: `Ye\p6v!+  
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                 |----------------- Minimum ----------------| |----------------- Maximum ----------------| ?e,pN,4  
Type                      Value      Criterion        Change          Value      Criterion        Change RPE5K:P  
Fringe tolerance on surface 1 N6 (  
TFRN   1            -1.00000000     0.54257256    -0.00145977     1.00000000     0.54548607     0.00145374 HN&Z2v  
Change in Focus                :      -0.000000                            0.000000 2JJ"O|Ibz  
Fringe tolerance on surface 2 1n:8s'\  
TFRN   2            -1.00000000     0.54177471    -0.00225762     1.00000000     0.54627463     0.00224230 S$Q8>u6Wk  
Change in Focus                :       0.000000                            0.000000 v"OY 1<8  
Fringe tolerance on surface 3 9hOJvQ2U]  
TFRN   3            -1.00000000     0.54779866     0.00376632     1.00000000     0.54022572    -0.00380662 Z; A`oKd  
Change in Focus                :      -0.000000                            0.000000 YN!>}  
Thickness tolerance on surface 1 -Xxqm%([71  
TTHI   1   3        -0.20000000     0.54321462    -0.00081772     0.20000000     0.54484759     0.00081525 Axe8n1*y  
Change in Focus                :       0.000000                            0.000000 rzh#CnL3  
Thickness tolerance on surface 2 bpKZ3}U  
TTHI   2   3        -0.20000000     0.54478712     0.00075478     0.20000000     0.54327558    -0.00075675 |aT| l^2R@  
Change in Focus                :       0.000000                           -0.000000 `<\1[HJ\  
Decenter X tolerance on surfaces 1 through 3 +(C6#R<LI  
TEDX   1   3        -0.20000000     0.54401464   -1.7700E-005     0.20000000     0.54401464   -1.7700E-005 G|( ]bvJ?  
Change in Focus                :       0.000000                            0.000000 8;Yx<woR  
Decenter Y tolerance on surfaces 1 through 3 ds?v'|  
TEDY   1   3        -0.20000000     0.54401464   -1.7700E-005     0.20000000     0.54401464   -1.7700E-005 o[cV1G  
Change in Focus                :       0.000000                            0.000000 1#0{@35  
Tilt X tolerance on surfaces 1 through 3 (degrees) \ aHVs  
TETX   1   3        -0.20000000     0.54897548     0.00494314     0.20000000     0.54897548     0.00494314 q.2ykL  
Change in Focus                :       0.000000                            0.000000 ]K/DY Do-  
Tilt Y tolerance on surfaces 1 through 3 (degrees) Yx eOI#L  
TETY   1   3        -0.20000000     0.54897548     0.00494314     0.20000000     0.54897548     0.00494314 Vzwc}k*Y  
Change in Focus                :       0.000000                            0.000000 $D}{]MN.  
Decenter X tolerance on surface 1 "QWq_R  
TSDX   1            -0.20000000     0.53999563    -0.00403671     0.20000000     0.53999563    -0.00403671 UmQ?rS8d  
Change in Focus                :       0.000000                            0.000000 )e a:Q?  
Decenter Y tolerance on surface 1 *g[^.Sg  
TSDY   1            -0.20000000     0.53999563    -0.00403671     0.20000000     0.53999563    -0.00403671 +eX@U;J,g  
Change in Focus                :       0.000000                            0.000000 _c,'>aH=  
Tilt X tolerance on surface (degrees) 1 o9F/y=.r=  
TSTX   1            -0.20000000     0.42678383    -0.11724851     0.20000000     0.42678383    -0.11724851 [BT/~6ovrZ  
Change in Focus                :       0.000000                            0.000000 ,=|ZB4HA  
Tilt Y tolerance on surface (degrees) 1 -
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TSTY   1            -0.20000000     0.42678383    -0.11724851     0.20000000     0.42678383    -0.11724851 z&{5;A}Q@  
Change in Focus                :       0.000000                            0.000000 72oF,42y  
Decenter X tolerance on surface 2 =9"W@n[>W  
TSDX   2            -0.20000000     0.51705427    -0.02697807     0.20000000     0.51705427    -0.02697807 hED=u/ql[  
Change in Focus                :       0.000000                            0.000000 AiK  
Decenter Y tolerance on surface 2 wAxrc+  
TSDY   2            -0.20000000     0.51705427    -0.02697807     0.20000000     0.51705427    -0.02697807 R0L&*Bjm  
Change in Focus                :       0.000000                            0.000000 CC@.MA@9N  
Tilt X tolerance on surface (degrees) 2 ui@2s;1t  
TSTX   2            -0.20000000     0.35349910    -0.19053324     0.20000000     0.35349910    -0.19053324 DBCK2PlJ  
Change in Focus                :       0.000000                            0.000000 >&p0d0  
Tilt Y tolerance on surface (degrees) 2 vh*U]3@  
TSTY   2            -0.20000000     0.35349910    -0.19053324     0.20000000     0.35349910    -0.19053324 uvV;Mlo]  
Change in Focus                :       0.000000                            0.000000 L30$%G|  
Decenter X tolerance on surface 3 1f8GW  
TSDX   3            -0.20000000     0.53419039    -0.00984195     0.20000000     0.53419039    -0.00984195 !X<~-G2)l  
Change in Focus                :       0.000000                            0.000000 j'BMAn ?  
Decenter Y tolerance on surface 3 TH$N5w%  
TSDY   3            -0.20000000     0.53419039    -0.00984195     0.20000000     0.53419039    -0.00984195 7?kIVP1r  
Change in Focus                :       0.000000                            0.000000 dVFf.  
Tilt X tolerance on surface (degrees) 3 aOiR l,  
TSTX   3            -0.20000000     0.42861670    -0.11541563     0.20000000     0.42861670    -0.11541563 a(v>Q*zNP  
Change in Focus                :       0.000000                            0.000000 >B2q+tA  
Tilt Y tolerance on surface (degrees) 3 HjGyj/78w  
TSTY   3            -0.20000000     0.42861670    -0.11541563     0.20000000     0.42861670    -0.11541563 X_g 3rv1J  
Change in Focus                :       0.000000                            0.000000 P
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Irregularity of surface 1 in fringes Ce")[<:  
TIRR   1            -0.20000000     0.50973587    -0.03429647     0.20000000     0.57333868     0.02930634 ^4`Px/&  
Change in Focus                :       0.000000                            0.000000 v0ES;  
Irregularity of surface 2 in fringes %
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TIRR   2            -0.20000000     0.53400904    -0.01002330     0.20000000     0.55360281     0.00957047 sSQs#+&=[  
Change in Focus                :       0.000000                            0.000000 ea00
\  
Irregularity of surface 3 in fringes %0mMz.
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TIRR   3            -0.20000000     0.58078982     0.03675748     0.20000000     0.49904394    -0.04498840 A^2Uzmzl?  
Change in Focus                :       0.000000                            0.000000 ZJ 77[  
Index tolerance on surface 1 lME)?LOI  
TIND   1            -0.00100000     0.52606778    -0.01796456     0.00100000     0.56121811     0.01718578 t6A:ZmG_  
Change in Focus                :       0.000000                            0.000000 u*#ZXW  
Index tolerance on surface 2 rJ!{/3e  
TIND   2            -0.00100000     0.55639086     0.01235852     0.00100000     0.53126361    -0.01276872 IW%|G  
Change in Focus                :       0.000000                           -0.000000 QtJg^2@  
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Worst offenders: *mMEl]+  
Type                      Value      Criterion        Change _+^ 2^TW  
TSTY   2            -0.20000000     0.35349910    -0.19053324 Z+StB15  
TSTY   2             0.20000000     0.35349910    -0.19053324 o)[2@fRC(  
TSTX   2            -0.20000000     0.35349910    -0.19053324 2d {y M(=(  
TSTX   2             0.20000000     0.35349910    -0.19053324 yGsz2T;w  
TSTY   1            -0.20000000     0.42678383    -0.11724851 zBP>jM(8  
TSTY   1             0.20000000     0.42678383    -0.11724851 /2HN>{F^Y  
TSTX   1            -0.20000000     0.42678383    -0.11724851 \#>T~.Y7K  
TSTX   1             0.20000000     0.42678383    -0.11724851 fuB)qt!E  
TSTY   3            -0.20000000     0.42861670    -0.11541563 m/@<c'
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TSTY   3             0.20000000     0.42861670    -0.11541563 fS"Hr0  
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Estimated Performance Changes based upon Root-Sum-Square method: vUnRi=:|  
Nominal MTF                 :     0.54403234 RJON90,J  
Estimated change            :    -0.36299231 @mBX~ ?=Z3  
Estimated MTF               :     0.18104003 wprX!)w<i  
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Compensator Statistics: l?q%?v8  
Change in back focus: 2AVa(  
Minimum            :        -0.000000 q9^  
Maximum            :         0.000000 W7\&~IWub  
Mean               :        -0.000000 rX;Ys2vQ*  
Standard Deviation :         0.000000 e[Jem5C  
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Monte Carlo Analysis: 4 8{vE3JY  
Number of trials: 20 2]c{P\  
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Initial Statistics: Normal Distribution 2EK
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  Trial       Criterion        Change 3J=Y9 }  
      1     0.42804416    -0.11598818 ,= &B28Qe)  
Change in Focus                :      -0.400171 ?9X&tK)E-  
      2     0.54384387    -0.00018847 _zu?.I0^  
Change in Focus                :       1.018470 7'-j%!#w  
      3     0.44510003    -0.09893230 ,\aUq|~  
Change in Focus                :      -0.601922 @Fpb-Qd"  
      4     0.18154684    -0.36248550 cf7v[ZZ}  
Change in Focus                :       0.920681 DS-fjH\  
      5     0.28665820    -0.25737414 3F#+~^2  
Change in Focus                :       1.253875 4A3nO<oMF  
      6     0.21263372    -0.33139862 )kJH5/  
Change in Focus                :      -0.903878 1H,g=Y4f%  
      7     0.40051424    -0.14351809 q,2]5'  
Change in Focus                :      -1.354815 oiH|uIsqR  
      8     0.48754161    -0.05649072 8V-\e?&^  
Change in Focus                :       0.215922 2nFy`|aA%  
      9     0.40357468    -0.14045766 fN "tA  
Change in Focus                :       0.281783 -OYDe@Wb]  
     10     0.26315315    -0.28087919 "W#t;;9Wz  
Change in Focus                :      -1.048393 9F^;!  
     11     0.26120585    -0.28282649 ,b$2=JO'f  
Change in Focus                :       1.017611 |Cdvfk  
     12     0.24033815    -0.30369419 s:AkkkF  
Change in Focus                :      -0.109292  YOAn4]j  
     13     0.37164046    -0.17239188 Sc]P<F7N]  
Change in Focus                :      -0.692430 dtAbc7
 
     14     0.48597489    -0.05805744 RAjkH`  
Change in Focus                :      -0.662040 WM)F0@"  
     15     0.21462327    -0.32940907
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Change in Focus                :       1.611296 m4[g6pNx~  
     16     0.43378226    -0.11025008 60Z]M+8y8  
Change in Focus                :      -0.640081 M/*NM= -a  
     17     0.39321881    -0.15081353 pX=,iOF[I  
Change in Focus                :       0.914906 SjdZyJa  
     18     0.20692530    -0.33710703 = zl=SLe  
Change in Focus                :       0.801607 K"2|[5  
     19     0.51374068    -0.03029165 G5tday~3  
Change in Focus                :       0.947293 111D3  
     20     0.38013374    -0.16389860 fB+b}aoV  
Change in Focus                :       0.667010 @S 6u9v  
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Number of traceable Monte Carlo files generated: 20 fRm}S>Nibb  
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Nominal     0.54403234 Z7jX9e"L  
Best        0.54384387    Trial     2 A7P`lJgv  
Worst       0.18154684    Trial     4 2BzqY`O  
Mean        0.35770970 [^~7]2i  
Std Dev     0.11156454 ^UA(HthY  
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X-B8MoG|  
Compensator Statistics: +[m8c){  
Change in back focus: h<+|x7u  
Minimum            :        -1.354815 CDp8)=WJFF  
Maximum            :         1.611296 ,PWj_}|L[  
Mean               :         0.161872 J`#`fX  
Standard Deviation :         0.869664 l oqvi  
#3kXmeyrD  
90% >       0.20977951               &2EBk=X  
80% >       0.22748071               Xev54!619  
50% >       0.38667627               ;5<-)  
20% >       0.46553746               fn9#>~vrD  
10% >       0.50064115                TD04/ ISHT  
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End of Run. F3Zxhk
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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 _ ^7|!(Sz  
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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 rdj@u47  
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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                 |}qjqtZ  
80% >       0.22748071                 8wiA  
50% >       0.38667627                 ?^3B3qqh9  
20% >       0.46553746                 "2h5m4  
10% >       0.50064115 }(=ml7)v  
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最后这个数值是MTF值呢，还是MTF的公差？ Zd>ZY,-5  
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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？？？   i X/tt  
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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  : /]l f>\x1  
90% >       0.20977951                 a5I%RY  
80% >       0.22748071                 dff#{  
50% >       0.38667627                 0, "ZV}  
20% >       0.46553746                 SJF2k[da  
10% >       0.50064115 R''Sfz>8  
....... v5gQ9  

mlmnkgl ]  
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这些数值都是MTF值

Criterion           : Geometric MTF average S&T at 30.0000 cycles per mm   H.f9d.<W%  
Mode                : Sensitivities ],!pp3U  
Sampling            : 2 Ubp
g92  
Nominal Criterion   : 0.54403234 u'{sB5_H  
Test Wavelength     : 0.6328 ~mW>_[RT;  
&8.z$}m  
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？ 
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&Qz"nCvJ  
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