[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 "aL.`^.  
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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 !l6Ez_'  
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图片:2.jpg

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然后运行分析的结果如下： UWXl c  
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Analysis of Tolerances A4~-{.w=  
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File : E:\光学设计资料\zemax练习\f500.ZMX N%f% U  
Title: OH >#f6`[  
Date : TUE JUN 21 2011 WqO4_;X6/  
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Units are Millimeters. 79*f <Gr  
All changes are computed using linear differences. $xU)t&Df
 
XN^l*Q?3n  
Paraxial Focus compensation only. @=ro/.  
| LXVf  
WARNING: Solves should be removed prior to tolerancing. x%'5rnm|  
]*Cq'<h$  
Mnemonics: eH_< <Xh!v  
TFRN: Tolerance on curvature in fringes. >Jk]=_%  
TTHI: Tolerance on thickness. gy`WBg(7x  
TSDX: Tolerance on surface decentering in x. Kh8  
TSDY: Tolerance on surface decentering in y. ~@\sN+VS  
TSTX: Tolerance on surface tilt in x (degrees). q4T98s2J  
TSTY: Tolerance on surface tilt in y (degrees). |s'5~+  
TIRR: Tolerance on irregularity (fringes). RsW
4 '5  
TIND: Tolerance on Nd index of refraction. $(]E$ek  
TEDX: Tolerance on element decentering in x. yBRYEqS+  
TEDY: Tolerance on element decentering in y. "x0/i?pqa  
TETX: Tolerance on element tilt in x (degrees). udOdXz6K?  
TETY: Tolerance on element tilt in y (degrees). yNhRh>l  
hb<cynY  
WARNING: RAY AIMING IS OFF. Very loose tolerances may not be computed accurately. [Y4Wm?  
0VZC7@  
WARNING: Boundary constraints on compensators will be ignored. [(2XL"4D  
||))gI`3a  
Criterion           : Geometric MTF average S&T at 30.0000 cycles per mm h0?w V5H  
Mode                : Sensitivities M0$_x~  
Sampling            : 2 !;UoZ~  
Nominal Criterion   : 0.54403234 qfX26<q  
Test Wavelength     : 0.6328 @1A.$:  
-wr_x<7  
_3IRj=Cs  
Fields: XY Symmetric Angle in degrees @qSZ=  
#      X-Field      Y-Field       Weight    VDX    VDY    VCX    VCY J|w%n5Y  
1   0.000E+000   0.000E+000   1.000E+000  0.000  0.000  0.000  0.000 [V_+/[AA)  
*L~?.9R  
Sensitivity Analysis: ~RH)iI  
of {K{(M7@  
                 |----------------- Minimum ----------------| |----------------- Maximum ----------------| L&d.&,CNs'  
Type                      Value      Criterion        Change          Value      Criterion        Change m8V
}E&6  
Fringe tolerance on surface 1
pekNBq Wm  
TFRN   1            -1.00000000     0.54257256    -0.00145977     1.00000000     0.54548607     0.00145374 y\})C-&  
Change in Focus                :      -0.000000                            0.000000 /I((A/ks  
Fringe tolerance on surface 2 }kF?9w  
TFRN   2            -1.00000000     0.54177471    -0.00225762     1.00000000     0.54627463     0.00224230 Q/q>mN"#1  
Change in Focus                :       0.000000                            0.000000 }>EWFE`  
Fringe tolerance on surface 3 DJ9x?SL@KD  
TFRN   3            -1.00000000     0.54779866     0.00376632     1.00000000     0.54022572    -0.00380662 eL<jA9cJ9  
Change in Focus                :      -0.000000                            0.000000 *^w}SE(  
Thickness tolerance on surface 1 fv@<  
TTHI   1   3        -0.20000000     0.54321462    -0.00081772     0.20000000     0.54484759     0.00081525 U^eos;:s8  
Change in Focus                :       0.000000                            0.000000 rP}[>  
Thickness tolerance on surface 2 @t;726  
TTHI   2   3        -0.20000000     0.54478712     0.00075478     0.20000000     0.54327558    -0.00075675 ! ,0  
Change in Focus                :       0.000000                           -0.000000 tLxeq?Oo]  
Decenter X tolerance on surfaces 1 through 3 e0#t  
TEDX   1   3        -0.20000000     0.54401464   -1.7700E-005     0.20000000     0.54401464   -1.7700E-005
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Change in Focus                :       0.000000                            0.000000 E*IP#:R  
Decenter Y tolerance on surfaces 1 through 3 ];jp)P2o  
TEDY   1   3        -0.20000000     0.54401464   -1.7700E-005     0.20000000     0.54401464   -1.7700E-005 )\j dF-s  
Change in Focus                :       0.000000                            0.000000 ~L>86/hP,N  
Tilt X tolerance on surfaces 1 through 3 (degrees) 'kco. 1{  
TETX   1   3        -0.20000000     0.54897548     0.00494314     0.20000000     0.54897548     0.00494314 T:Ovh.$  
Change in Focus                :       0.000000                            0.000000 T--%UZD]W  
Tilt Y tolerance on surfaces 1 through 3 (degrees) j@w1S[vt  
TETY   1   3        -0.20000000     0.54897548     0.00494314     0.20000000     0.54897548     0.00494314 aj,o<J
  
Change in Focus                :       0.000000                            0.000000 .ANR|G  
Decenter X tolerance on surface 1 x(xi%?G  
TSDX   1            -0.20000000     0.53999563    -0.00403671     0.20000000     0.53999563    -0.00403671  jr_z ?  
Change in Focus                :       0.000000                            0.000000 N>,`TsUwW  
Decenter Y tolerance on surface 1 Wy*+8~@A  
TSDY   1            -0.20000000     0.53999563    -0.00403671     0.20000000     0.53999563    -0.00403671 ~;a\S3  
Change in Focus                :       0.000000                            0.000000 oP9 y@U  
Tilt X tolerance on surface (degrees) 1 k].swvIi  
TSTX   1            -0.20000000     0.42678383    -0.11724851     0.20000000     0.42678383    -0.11724851 P tLWFO  
Change in Focus                :       0.000000                            0.000000 beC%Tnb7  
Tilt Y tolerance on surface (degrees) 1 L
t=32SvTn  
TSTY   1            -0.20000000     0.42678383    -0.11724851     0.20000000     0.42678383    -0.11724851 biU_ImJ>0  
Change in Focus                :       0.000000                            0.000000 )dqNN tS  
Decenter X tolerance on surface 2 7s#8-i  
TSDX   2            -0.20000000     0.51705427    -0.02697807     0.20000000     0.51705427    -0.02697807 xVbRCu#Z  
Change in Focus                :       0.000000                            0.000000 rhy-o?  
Decenter Y tolerance on surface 2 Hz."4nhv  
TSDY   2            -0.20000000     0.51705427    -0.02697807     0.20000000     0.51705427    -0.02697807 4xr^4\lk  
Change in Focus                :       0.000000                            0.000000 c9fz x  
Tilt X tolerance on surface (degrees) 2 ,LN^Zx*  
TSTX   2            -0.20000000     0.35349910    -0.19053324     0.20000000     0.35349910    -0.19053324 H$C*&p  
Change in Focus                :       0.000000                            0.000000 \U]K!K=  
Tilt Y tolerance on surface (degrees) 2 ;Tp9)UP)  
TSTY   2            -0.20000000     0.35349910    -0.19053324     0.20000000     0.35349910    -0.19053324 rU&Y/  
Change in Focus                :       0.000000                            0.000000 Wm`*IBWA  
Decenter X tolerance on surface 3 ;'8Wl  
TSDX   3            -0.20000000     0.53419039    -0.00984195     0.20000000     0.53419039    -0.00984195 |[Fb&x  
Change in Focus                :       0.000000                            0.000000 f"P866@oWn  
Decenter Y tolerance on surface 3 H"8B4~*7H  
TSDY   3            -0.20000000     0.53419039    -0.00984195     0.20000000     0.53419039    -0.00984195 xh$yXP0/  
Change in Focus                :       0.000000                            0.000000 3PZ(Kn<  
Tilt X tolerance on surface (degrees) 3 un_NBv}  
TSTX   3            -0.20000000     0.42861670    -0.11541563     0.20000000     0.42861670    -0.11541563 P.@dB.Ny  
Change in Focus                :       0.000000                            0.000000 1:](=%oM&k  
Tilt Y tolerance on surface (degrees) 3 5rB>)p05[  
TSTY   3            -0.20000000     0.42861670    -0.11541563     0.20000000     0.42861670    -0.11541563 T?m@`"L,  
Change in Focus                :       0.000000                            0.000000 _Ffg"xoC  
Irregularity of surface 1 in fringes >pLJ ,Z  
TIRR   1            -0.20000000     0.50973587    -0.03429647     0.20000000     0.57333868     0.02930634 LdG?kbJ&y  
Change in Focus                :       0.000000                            0.000000 CU\gx*=E  
Irregularity of surface 2 in fringes ~LpkA`Hn!  
TIRR   2            -0.20000000     0.53400904    -0.01002330     0.20000000     0.55360281     0.00957047 UHvA43  
Change in Focus                :       0.000000                            0.000000 03v+eT  
Irregularity of surface 3 in fringes !>> A@3  
TIRR   3            -0.20000000     0.58078982     0.03675748     0.20000000     0.49904394    -0.04498840 ZAn @NA=  
Change in Focus                :       0.000000                            0.000000 CO@G
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Index tolerance on surface 1
7`J2/(  
TIND   1            -0.00100000     0.52606778    -0.01796456     0.00100000     0.56121811     0.01718578 zhs@YMY  
Change in Focus                :       0.000000                            0.000000 =EFh*sp  
Index tolerance on surface 2 >P~*@>e  
TIND   2            -0.00100000     0.55639086     0.01235852     0.00100000     0.53126361    -0.01276872 |{kbc0*  
Change in Focus                :       0.000000                           -0.000000 hQ<7k'V  
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Worst offenders: eZ(ThA*2=t  
Type                      Value      Criterion        Change s=(q#Z  
TSTY   2            -0.20000000     0.35349910    -0.19053324 A(E}2iP9=  
TSTY   2             0.20000000     0.35349910    -0.19053324 igA?E56?  
TSTX   2            -0.20000000     0.35349910    -0.19053324 ptT-{vG  
TSTX   2             0.20000000     0.35349910    -0.19053324 mP }<{oh`x  
TSTY   1            -0.20000000     0.42678383    -0.11724851 ]#f%Dku.m  
TSTY   1             0.20000000     0.42678383    -0.11724851 Itr4Pr  
TSTX   1            -0.20000000     0.42678383    -0.11724851
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TSTX   1             0.20000000     0.42678383    -0.11724851 /Z:NoTGn  
TSTY   3            -0.20000000     0.42861670    -0.11541563 x6R M)rr  
TSTY   3             0.20000000     0.42861670    -0.11541563 kh.P)h'9  
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Estimated Performance Changes based upon Root-Sum-Square method: mTtaqo_Bh  
Nominal MTF                 :     0.54403234 d%0Gsga}  
Estimated change            :    -0.36299231 P*iC#w]m  
Estimated MTF               :     0.18104003 ;&6 {c  
]?1_.Wjtt  
Compensator Statistics: *:xOenI  
Change in back focus: QyVAs;  
Minimum            :        -0.000000 E&kv4,  
Maximum            :         0.000000 /.7RWy`  
Mean               :        -0.000000 I m I$~q'  
Standard Deviation :         0.000000 E& 6I`8  
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Monte Carlo Analysis: :po6%}hn  
Number of trials: 20 j8Z;}Ps  
@6~lZgXOV[  
Initial Statistics: Normal Distribution f#:3TJV  
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  Trial       Criterion        Change ~|S0E:*.  
      1     0.42804416    -0.11598818 lj}3TbM  
Change in Focus                :      -0.400171 q]OIP"yv  
      2     0.54384387    -0.00018847 ULz<P  
Change in Focus                :       1.018470 _2G _Io  
      3     0.44510003    -0.09893230 Hj r'C?[  
Change in Focus                :      -0.601922 7P3pjgh  
      4     0.18154684    -0.36248550 EP@u4F  
Change in Focus                :       0.920681 qI7KWUR  
      5     0.28665820    -0.25737414 %dPk,Ylz  
Change in Focus                :       1.253875 %Ve@DF8G  
      6     0.21263372    -0.33139862 n',X,P
0  
Change in Focus                :      -0.903878 lfDd%.:q4S  
      7     0.40051424    -0.14351809 gNP1UH4m  
Change in Focus                :      -1.354815 hT-^1:N  
      8     0.48754161    -0.05649072 EF:ec9 .  
Change in Focus                :       0.215922 +Xw%X3o)  
      9     0.40357468    -0.14045766 h+B7BjA>G  
Change in Focus                :       0.281783 HL"c yxe  
     10     0.26315315    -0.28087919 z9IW&f~~P  
Change in Focus                :      -1.048393 gq+0t  
     11     0.26120585    -0.28282649 &T,,fz$  
Change in Focus                :       1.017611 <jJ'T?,  
     12     0.24033815    -0.30369419 }O~D3z4l0  
Change in Focus                :      -0.109292 uQdH():  
     13     0.37164046    -0.17239188 Mu`_^gG  
Change in Focus                :      -0.692430 3G4WKg.^  
     14     0.48597489    -0.05805744 ":+d7xR?o  
Change in Focus                :      -0.662040 XlF,_  
     15     0.21462327    -0.32940907 _Kaqx"D  
Change in Focus                :       1.611296 a({Rb?b  
     16     0.43378226    -0.11025008 Xk|a%%O*H  
Change in Focus                :      -0.640081 0o$RvxJ  
     17     0.39321881    -0.15081353 F>{bVPh VA  
Change in Focus                :       0.914906 \m)s"Sh.  
     18     0.20692530    -0.33710703 JzN "o'  
Change in Focus                :       0.801607 *c4OhMU(  
     19     0.51374068    -0.03029165 x/{-U05  
Change in Focus                :       0.947293 UUWRC1EtI  
     20     0.38013374    -0.16389860 moFrNcso  
Change in Focus                :       0.667010 Pn^:cr|  
*<cRQfA1  
Number of traceable Monte Carlo files generated: 20 Y~*p27@fR  
YkFLNCg4}  
Nominal     0.54403234 XO?WxL9k]  
Best        0.54384387    Trial     2
n5~Dxk  
Worst       0.18154684    Trial     4 7<70\6  
Mean        0.35770970 $9\8?gS  
Std Dev     0.11156454 4IZAJqw(*  
^-?^iWQG  
c[M4l  
Compensator Statistics: !8|r$mN8  
Change in back focus: FP{=b/  
Minimum            :        -1.354815 #"A`:bjG  
Maximum            :         1.611296 [Y
lRz  
Mean               :         0.161872 V+sZ;
$  
Standard Deviation :         0.869664 x!S}Y"  
am5;B`}q  
90% >       0.20977951               [%LGiCU]  
80% >       0.22748071               z
I9jxwXU  
50% >       0.38667627               h] )&mFiE"  
20% >       0.46553746               h;E.y   
10% >       0.50064115                BuM#&]s  
(@T{
[\  
End of Run. ec^{ez@`  
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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 ;gHcDnH)  

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 :L:] 3L  
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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                 D*HK[_5  
80% >       0.22748071                 N0 t26| A  
50% >       0.38667627                 Np~qtR  
20% >       0.46553746                 FFN.9[Ly  
10% >       0.50064115 lm'.G99{  
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最后这个数值是MTF值呢，还是MTF的公差？ !C.{nOfyv  
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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？？？   ,b+Hy`t  
`AdHyE  
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  : QmB,~x{j>  
90% >       0.20977951                 t~]oJ5%  
80% >       0.22748071                 o)6udRzBv  
50% >       0.38667627                 - e"XEot~  
20% >       0.46553746                 <b;Oap3  
10% >       0.50064115 7llEB*dSA  
....... W.U|mNJ$
 

WN?meZ/N/  
'Xzi$}E D  
这些数值都是MTF值

Criterion           : Geometric MTF average S&T at 30.0000 cycles per mm   ?|9$o/Q}  
Mode                : Sensitivities *:A)j?(  
Sampling            : 2 QWGFXy,=1  
Nominal Criterion   : 0.54403234 eDSBs
3k7H  
Test Wavelength     : 0.6328 Kq0hT4w  
)p;gm`42oY  
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？ Va/p   
.9g\WH#qD|  
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