[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 lhw]?\  
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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 jb~a z  
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图片:2.jpg

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然后运行分析的结果如下： ;ZHKTOoK  
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Analysis of Tolerances L+LxS|S+M  
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File : E:\光学设计资料\zemax练习\f500.ZMX 7Bm 18  
Title: 4!p~Mr[E  
Date : TUE JUN 21 2011 *vc=>AEc  
;>QED  
Units are Millimeters. F,Y@  
All changes are computed using linear differences. AFcsbw  
iDt^4=`  
Paraxial Focus compensation only. +(0Fab8g  
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WARNING: Solves should be removed prior to tolerancing. !4GGq  
Ja>UcE29  
Mnemonics: Qj5~ lX`W  
TFRN: Tolerance on curvature in fringes. AWHB^}!}  
TTHI: Tolerance on thickness. |-4C[5rM  
TSDX: Tolerance on surface decentering in x. DnvJx!#R  
TSDY: Tolerance on surface decentering in y. ZZOBMF7  
TSTX: Tolerance on surface tilt in x (degrees). lwYk`'  
TSTY: Tolerance on surface tilt in y (degrees). Uhfm@1 cz&  
TIRR: Tolerance on irregularity (fringes). 2  *IF  
TIND: Tolerance on Nd index of refraction. )W95)]  
TEDX: Tolerance on element decentering in x. Qna ^Ry?6)  
TEDY: Tolerance on element decentering in y. /%C6e )7BL  
TETX: Tolerance on element tilt in x (degrees). ;v'7l>w3\w  
TETY: Tolerance on element tilt in y (degrees). &o{I9MD  
+N5#EpW  
WARNING: RAY AIMING IS OFF. Very loose tolerances may not be computed accurately. 3p{N7/z(  
Zs<}{`-  
WARNING: Boundary constraints on compensators will be ignored. g66=3c9</6  
2|@@x

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Criterion           : Geometric MTF average S&T at 30.0000 cycles per mm xy>wA  
Mode                : Sensitivities s|
Ls  
Sampling            : 2 qp
 4.XL  
Nominal Criterion   : 0.54403234 cE>K:3n  
Test Wavelength     : 0.6328 [H;HrwM s)  
ljVtFm<  
}1]/dCv  
Fields: XY Symmetric Angle in degrees !|_b
}/  
#      X-Field      Y-Field       Weight    VDX    VDY    VCX    VCY .w/#S-at  
1   0.000E+000   0.000E+000   1.000E+000  0.000  0.000  0.000  0.000 fL.;-  
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Sensitivity Analysis: [tsi8r=T  
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                 |----------------- Minimum ----------------| |----------------- Maximum ----------------| '$pT:4EuGq  
Type                      Value      Criterion        Change          Value      Criterion        Change `l@[8H%aw  
Fringe tolerance on surface 1 3{RuR+yi  
TFRN   1            -1.00000000     0.54257256    -0.00145977     1.00000000     0.54548607     0.00145374 m6^Ua  
Change in Focus                :      -0.000000                            0.000000 I"Y d6M% ;  
Fringe tolerance on surface 2 PxzeN
6f  
TFRN   2            -1.00000000     0.54177471    -0.00225762     1.00000000     0.54627463     0.00224230 yi<&'L;  
Change in Focus                :       0.000000                            0.000000 @;kw6f:{d  
Fringe tolerance on surface 3 q9.)p  
TFRN   3            -1.00000000     0.54779866     0.00376632     1.00000000     0.54022572    -0.00380662 3xef>Xv=  
Change in Focus                :      -0.000000                            0.000000 (Z5=GJM?$  
Thickness tolerance on surface 1 F{)YdqQ  
TTHI   1   3        -0.20000000     0.54321462    -0.00081772     0.20000000     0.54484759     0.00081525 JL $6Fw;  
Change in Focus                :       0.000000                            0.000000 &B^#?vmO  
Thickness tolerance on surface 2 u8qL?Aj^  
TTHI   2   3        -0.20000000     0.54478712     0.00075478     0.20000000     0.54327558    -0.00075675 O-Hu:KuIf  
Change in Focus                :       0.000000                           -0.000000 k%E9r'Ac  
Decenter X tolerance on surfaces 1 through 3 /Y5I0Ko Uw  
TEDX   1   3        -0.20000000     0.54401464   -1.7700E-005     0.20000000     0.54401464   -1.7700E-005 'E
U{%\qM  
Change in Focus                :       0.000000                            0.000000 c_c]0Tm  
Decenter Y tolerance on surfaces 1 through 3 5,`U3na,  
TEDY   1   3        -0.20000000     0.54401464   -1.7700E-005     0.20000000     0.54401464   -1.7700E-005 wVkms  
Change in Focus                :       0.000000                            0.000000 K y~ 9's  
Tilt X tolerance on surfaces 1 through 3 (degrees) W"S,~y  
TETX   1   3        -0.20000000     0.54897548     0.00494314     0.20000000     0.54897548     0.00494314 )~xL_yW_X  
Change in Focus                :       0.000000                            0.000000 (1H_V(  
Tilt Y tolerance on surfaces 1 through 3 (degrees) },'hhj]O  
TETY   1   3        -0.20000000     0.54897548     0.00494314     0.20000000     0.54897548     0.00494314 tk"L2t  
Change in Focus                :       0.000000                            0.000000 fv$Y&_,5  
Decenter X tolerance on surface 1 "Pi\I9M3  
TSDX   1            -0.20000000     0.53999563    -0.00403671     0.20000000     0.53999563    -0.00403671 L>+g;GJ  
Change in Focus                :       0.000000                            0.000000 /tRzb8`  
Decenter Y tolerance on surface 1 _?>!Bz m  
TSDY   1            -0.20000000     0.53999563    -0.00403671     0.20000000     0.53999563    -0.00403671 mN+~fuh  
Change in Focus                :       0.000000                            0.000000 9+@"DuYc6  
Tilt X tolerance on surface (degrees) 1 #S2LQ5U  
TSTX   1            -0.20000000     0.42678383    -0.11724851     0.20000000     0.42678383    -0.11724851 kwNXKn/
 
Change in Focus                :       0.000000                            0.000000 ^Dhj<_  
Tilt Y tolerance on surface (degrees) 1 c'OJodp
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TSTY   1            -0.20000000     0.42678383    -0.11724851     0.20000000     0.42678383    -0.11724851 |t CD@M  
Change in Focus                :       0.000000                            0.000000 6-va;G9Fc  
Decenter X tolerance on surface 2 fZ$
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TSDX   2            -0.20000000     0.51705427    -0.02697807     0.20000000     0.51705427    -0.02697807 QT{$2 7;  
Change in Focus                :       0.000000                            0.000000 ;wND?:  
Decenter Y tolerance on surface 2 xn)FE4  
TSDY   2            -0.20000000     0.51705427    -0.02697807     0.20000000     0.51705427    -0.02697807 q# gZ\V$I  
Change in Focus                :       0.000000                            0.000000 S+>&O3m  
Tilt X tolerance on surface (degrees) 2 '&Ox,i]t  
TSTX   2            -0.20000000     0.35349910    -0.19053324     0.20000000     0.35349910    -0.19053324 {%D!~,4Ht  
Change in Focus                :       0.000000                            0.000000 g`)3m,\  
Tilt Y tolerance on surface (degrees) 2 k$:QpTg[  
TSTY   2            -0.20000000     0.35349910    -0.19053324     0.20000000     0.35349910    -0.19053324 !VpZo*+  
Change in Focus                :       0.000000                            0.000000 g0I<Fan  
Decenter X tolerance on surface 3 >C"cv^%c  
TSDX   3            -0.20000000     0.53419039    -0.00984195     0.20000000     0.53419039    -0.00984195 GDw4=0u-  
Change in Focus                :       0.000000                            0.000000 B[ae<V0k  
Decenter Y tolerance on surface 3 !jY/}M~F1  
TSDY   3            -0.20000000     0.53419039    -0.00984195     0.20000000     0.53419039    -0.00984195 "L@qjSs8  
Change in Focus                :       0.000000                            0.000000 ,{ CgOz+Ul  
Tilt X tolerance on surface (degrees) 3 (Tp+43v  
TSTX   3            -0.20000000     0.42861670    -0.11541563     0.20000000     0.42861670    -0.11541563 D *W+0  
Change in Focus                :       0.000000                            0.000000 mXlXB#N  
Tilt Y tolerance on surface (degrees) 3 !_E E|#`n  
TSTY   3            -0.20000000     0.42861670    -0.11541563     0.20000000     0.42861670    -0.11541563 ASY 
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Change in Focus                :       0.000000                            0.000000 ju0]
~,  
Irregularity of surface 1 in fringes 6;Cr92  
TIRR   1            -0.20000000     0.50973587    -0.03429647     0.20000000     0.57333868     0.02930634 S<Q8kW:  
Change in Focus                :       0.000000                            0.000000 j>gO]*BX~  
Irregularity of surface 2 in fringes =bs4*[zq  
TIRR   2            -0.20000000     0.53400904    -0.01002330     0.20000000     0.55360281     0.00957047 rMxst  
Change in Focus                :       0.000000                            0.000000 K4SR`Q  
Irregularity of surface 3 in fringes B) &BqZ&  
TIRR   3            -0.20000000     0.58078982     0.03675748     0.20000000     0.49904394    -0.04498840 qM3^)U2  
Change in Focus                :       0.000000                            0.000000 U#G uB&V  
Index tolerance on surface 1 I
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TIND   1            -0.00100000     0.52606778    -0.01796456     0.00100000     0.56121811     0.01718578 G+4a%?JH  
Change in Focus                :       0.000000                            0.000000 I'"*#QOX  
Index tolerance on surface 2 a1ZGMQq!  
TIND   2            -0.00100000     0.55639086     0.01235852     0.00100000     0.53126361    -0.01276872 1p
XAPTV  
Change in Focus                :       0.000000                           -0.000000 WzgzI/  
[ /*$?PXt  
Worst offenders: mhJ>5z  
Type                      Value      Criterion        Change Z]$yuM  
TSTY   2            -0.20000000     0.35349910    -0.19053324 :eS7"EG{3  
TSTY   2             0.20000000     0.35349910    -0.19053324 %_M B-  
TSTX   2            -0.20000000     0.35349910    -0.19053324 Fdd$Bl.&XS  
TSTX   2             0.20000000     0.35349910    -0.19053324 ]w%7/N0R  
TSTY   1            -0.20000000     0.42678383    -0.11724851
NrVQK}%K  
TSTY   1             0.20000000     0.42678383    -0.11724851 (~-q}_G;Q  
TSTX   1            -0.20000000     0.42678383    -0.11724851 }@@1N3nnxV  
TSTX   1             0.20000000     0.42678383    -0.11724851 X ~4^$x  
TSTY   3            -0.20000000     0.42861670    -0.11541563 RTA9CR)JP4  
TSTY   3             0.20000000     0.42861670    -0.11541563 l1jS2O(  
x)G/YUv76  
Estimated Performance Changes based upon Root-Sum-Square method: n$y1kD  
Nominal MTF                 :     0.54403234 [#j|TBMHM  
Estimated change            :    -0.36299231 Q9K Gf;  
Estimated MTF               :     0.18104003 8/b_4!5c  
9L%&4V}BIS  
Compensator Statistics: }n=Tw92g  
Change in back focus: \ :})R{  
Minimum            :        -0.000000 Y~=5umNSX  
Maximum            :         0.000000 %P_\7YBC>  
Mean               :        -0.000000 =%Ut&6}sQ  
Standard Deviation :         0.000000 M(Jf&h4b  
PZLWyp  
Monte Carlo Analysis: 1|/2%IDUI  
Number of trials: 20 Y+upZ@Ga  
dp)lHBV  
Initial Statistics: Normal Distribution (n"M)  
"$0f.FO:i  
  Trial       Criterion        Change a9QaFs"  
      1     0.42804416    -0.11598818 rC_K L  
Change in Focus                :      -0.400171 :KX/`   
      2     0.54384387    -0.00018847 HLYM(Pz  
Change in Focus                :       1.018470 \Zoo9Wy  
      3     0.44510003    -0.09893230 NXeo&+F  
Change in Focus                :      -0.601922 SKLQAE5  
      4     0.18154684    -0.36248550 ZI}m~7  
Change in Focus                :       0.920681 5`x9+XvoN  
      5     0.28665820    -0.25737414 iCAd7=o  
Change in Focus                :       1.253875 b@1QE  
      6     0.21263372    -0.33139862 dUb(C1h  
Change in Focus                :      -0.903878 6ap,XFRMh  
      7     0.40051424    -0.14351809 Z|8f7@k{|+  
Change in Focus                :      -1.354815 \vQ_:-A  
      8     0.48754161    -0.05649072 lS?f?n^  
Change in Focus                :       0.215922 `9K'I-hv<8  
      9     0.40357468    -0.14045766 ::TUSz2/2  
Change in Focus                :       0.281783 7Fy^K;V"  
     10     0.26315315    -0.28087919 Tj:+:B(HB  
Change in Focus                :      -1.048393 J\;~(: ~  
     11     0.26120585    -0.28282649 !\aw
T  
Change in Focus                :       1.017611 &`>*3m(  
     12     0.24033815    -0.30369419 c |C12b[  
Change in Focus                :      -0.109292 'c &Bmd40  
     13     0.37164046    -0.17239188 rEAPlO.Yp  
Change in Focus                :      -0.692430 +nJ}+|@
K  
     14     0.48597489    -0.05805744 oAvJ"JH@i  
Change in Focus                :      -0.662040 Wc,8<Y'   
     15     0.21462327    -0.32940907 @ K@~4!  
Change in Focus                :       1.611296 saRB~[6I  
     16     0.43378226    -0.11025008 `M7){  
Change in Focus                :      -0.640081 ^f`#8G7(  
     17     0.39321881    -0.15081353 -3 W4  
Change in Focus                :       0.914906 l}O`cC
 
     18     0.20692530    -0.33710703 i"e)LJz  
Change in Focus                :       0.801607 ;U7\pc;S  
     19     0.51374068    -0.03029165 k*!J,/=k  
Change in Focus                :       0.947293 B;K{V
o:C  
     20     0.38013374    -0.16389860 'HqAm$
V+  
Change in Focus                :       0.667010 1H[lf B  
J25>t^  
Number of traceable Monte Carlo files generated: 20 *=2jteG=3.  
3ZB;-F5v  
Nominal     0.54403234 v>nJy~O]  
Best        0.54384387    Trial     2 o9~qJnB/O  
Worst       0.18154684    Trial     4 MfL q h  
Mean        0.35770970 zJ9,iJyuD  
Std Dev     0.11156454 yTDoS|B+)  
omRd'\ RO  
kb%W3c9HO  
Compensator Statistics: 5;|9bWH  
Change in back focus: V_ ]4UE  
Minimum            :        -1.354815 "M:arP5f  
Maximum            :         1.611296 2l!"OiB.P  
Mean               :         0.161872 `8y &  
Standard Deviation :         0.869664 Mys;Il"  
N{q'wep  
90% >       0.20977951               g{D&|qWj  
80% >       0.22748071               lN1zfM  
50% >       0.38667627               7=<PVJ*/  
20% >       0.46553746               D8dTw{C  
10% >       0.50064115                VJ$C)0xQA  
aIfog+Lp  
End of Run. {:oZ&y)Ac  
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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 ,\qo  

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 4u(}eE f7  
1L9^N  
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                 FU[,,a0<<  
80% >       0.22748071                 zbi
  
50% >       0.38667627                 z84W{! P  
20% >       0.46553746                 "TV.$s$.  
10% >       0.50064115 EiN.VU `  
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最后这个数值是MTF值呢，还是MTF的公差？ $Us@fJr  
=;a
4 Dp  
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？？？   lcP@5ZW  
%%Kg'{-:  
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  : iW}l[g8sw!  
90% >       0.20977951                 <VU4rk^=  
80% >       0.22748071                 j?f <hQ  
50% >       0.38667627                 [/Z'OV"tU
 
20% >       0.46553746                 .G_3blE;  
10% >       0.50064115 ow_y  
....... uK:-g,;  

0Mu8ZVI{  
1mJ_I|98  
这些数值都是MTF值

Criterion           : Geometric MTF average S&T at 30.0000 cycles per mm   B^_Chj*m  
Mode                : Sensitivities ),]2`w&k  
Sampling            : 2 %Sn6*\z  
Nominal Criterion   : 0.54403234 *fl{Y(_OO  
Test Wavelength     : 0.6328 dA} 72D?  
qX+gG",8  
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？ eky(;%Sz  
bqrJP3  
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