[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 wn Q% 'Eo  
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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 ?910ki_  
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图片:2.jpg

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然后运行分析的结果如下： @v~<E?Un  
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Analysis of Tolerances SdXAL  
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File : E:\光学设计资料\zemax练习\f500.ZMX *r/o \pyH  
Title: Ha/Gn!l  
Date : TUE JUN 21 2011 #,S0uA  
"ivSpec.V  
Units are Millimeters. X,`^z,M%I  
All changes are computed using linear differences. yD yMI  
tSX,*
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Paraxial Focus compensation only. R+<M"LriR&  
uB;PaZG?{  
WARNING: Solves should be removed prior to tolerancing. fO{'$?K  
G\C>fwrP_  
Mnemonics: z^Y4:^L~I  
TFRN: Tolerance on curvature in fringes. ,e@707d`\  
TTHI: Tolerance on thickness. 4c,{Js  
TSDX: Tolerance on surface decentering in x. -(VX+XHW  
TSDY: Tolerance on surface decentering in y. #9/S2m2\YG  
TSTX: Tolerance on surface tilt in x (degrees). 7J|eL yj  
TSTY: Tolerance on surface tilt in y (degrees). 
RD6`b_]o  
TIRR: Tolerance on irregularity (fringes). A 6j>KTU  
TIND: Tolerance on Nd index of refraction. MT^krv(G  
TEDX: Tolerance on element decentering in x. t@cImmh\T  
TEDY: Tolerance on element decentering in y. H|8i|vbi  
TETX: Tolerance on element tilt in x (degrees). ^K?Mq1"Db  
TETY: Tolerance on element tilt in y (degrees). "ZR^w5  
w9,w?
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WARNING: RAY AIMING IS OFF. Very loose tolerances may not be computed accurately. OE(!^"5?[  
:^J'_  
WARNING: Boundary constraints on compensators will be ignored. J%1 2Ey@6  
iu+rg(*%  
Criterion           : Geometric MTF average S&T at 30.0000 cycles per mm G|LcTV  
Mode                : Sensitivities \w=*:Z  
Sampling            : 2 [J6q(}f  
Nominal Criterion   : 0.54403234 s-e<&*D[  
Test Wavelength     : 0.6328 +`+r\*C5  
WV,j <x9w  
\heQVWRl  
Fields: XY Symmetric Angle in degrees q/dja  
#      X-Field      Y-Field       Weight    VDX    VDY    VCX    VCY G0Wv=tX|  
1   0.000E+000   0.000E+000   1.000E+000  0.000  0.000  0.000  0.000 KFf6um  
A08{]E#v>  
Sensitivity Analysis: q/3 )yG6s  
8]A`WDO3  
                 |----------------- Minimum ----------------| |----------------- Maximum ----------------| Pi'[d7o  
Type                      Value      Criterion        Change          Value      Criterion        Change P3+?gW'  
Fringe tolerance on surface 1 xf4`+[  
TFRN   1            -1.00000000     0.54257256    -0.00145977     1.00000000     0.54548607     0.00145374 o0FVVSl  
Change in Focus                :      -0.000000                            0.000000 JAS!eF  
Fringe tolerance on surface 2 0
ChdFf7  
TFRN   2            -1.00000000     0.54177471    -0.00225762     1.00000000     0.54627463     0.00224230 ?T7ndXX  
Change in Focus                :       0.000000                            0.000000  &D

X  
Fringe tolerance on surface 3 l
^4!  
TFRN   3            -1.00000000     0.54779866     0.00376632     1.00000000     0.54022572    -0.00380662 -n]E
\"  
Change in Focus                :      -0.000000                            0.000000 Y5\=5r/  
Thickness tolerance on surface 1 {f[X)  
TTHI   1   3        -0.20000000     0.54321462    -0.00081772     0.20000000     0.54484759     0.00081525 iNEE2BPp  
Change in Focus                :       0.000000                            0.000000 8BggK6X  
Thickness tolerance on surface 2
[|dQZ  
TTHI   2   3        -0.20000000     0.54478712     0.00075478     0.20000000     0.54327558    -0.00075675 Sj9NhtF]f  
Change in Focus                :       0.000000                           -0.000000 {"@E_{\  
Decenter X tolerance on surfaces 1 through 3 "Rq)%o$Z  
TEDX   1   3        -0.20000000     0.54401464   -1.7700E-005     0.20000000     0.54401464   -1.7700E-005 _?~)B\@~0  
Change in Focus                :       0.000000                            0.000000 O`2hTY\  
Decenter Y tolerance on surfaces 1 through 3 Fa9gr/.F,@  
TEDY   1   3        -0.20000000     0.54401464   -1.7700E-005     0.20000000     0.54401464   -1.7700E-005 b(?A^a  
Change in Focus                :       0.000000                            0.000000 5}he)2*uD  
Tilt X tolerance on surfaces 1 through 3 (degrees) F'3-*>]P  
TETX   1   3        -0.20000000     0.54897548     0.00494314     0.20000000     0.54897548     0.00494314 JTfG^Nv>K  
Change in Focus                :       0.000000                            0.000000 L7 g4'  
Tilt Y tolerance on surfaces 1 through 3 (degrees) \"AzT{l!;  
TETY   1   3        -0.20000000     0.54897548     0.00494314     0.20000000     0.54897548     0.00494314 cP&XkAQ  
Change in Focus                :       0.000000                            0.000000 8~eYN-#W&  
Decenter X tolerance on surface 1 +i6XCN1=  
TSDX   1            -0.20000000     0.53999563    -0.00403671     0.20000000     0.53999563    -0.00403671 Q\{$&0McF  
Change in Focus                :       0.000000                            0.000000 707-iLkt.1  
Decenter Y tolerance on surface 1 W6L}T,epX  
TSDY   1            -0.20000000     0.53999563    -0.00403671     0.20000000     0.53999563    -0.00403671  mIkc+X  
Change in Focus                :       0.000000                            0.000000 4KT-U6zNx  
Tilt X tolerance on surface (degrees) 1 7?EC kuSv  
TSTX   1            -0.20000000     0.42678383    -0.11724851     0.20000000     0.42678383    -0.11724851 XdGA8%^cY  
Change in Focus                :       0.000000                            0.000000 F<|x_6a\  
Tilt Y tolerance on surface (degrees) 1 <O30X !QuK  
TSTY   1            -0.20000000     0.42678383    -0.11724851     0.20000000     0.42678383    -0.11724851 [;8vO=Z  
Change in Focus                :       0.000000                            0.000000 @Yy']!Ju  
Decenter X tolerance on surface 2  4xnM7t\  
TSDX   2            -0.20000000     0.51705427    -0.02697807     0.20000000     0.51705427    -0.02697807 ,`;D
re  
Change in Focus                :       0.000000                            0.000000 =~F.7wq*^  
Decenter Y tolerance on surface 2 z\r|5Z  
TSDY   2            -0.20000000     0.51705427    -0.02697807     0.20000000     0.51705427    -0.02697807 ?j-;;NNf  
Change in Focus                :       0.000000                            0.000000 (H-
Y-Lk+  
Tilt X tolerance on surface (degrees) 2 =VM4Q+'K  
TSTX   2            -0.20000000     0.35349910    -0.19053324     0.20000000     0.35349910    -0.19053324 3FpSo+  
Change in Focus                :       0.000000                            0.000000 $][$ e  
Tilt Y tolerance on surface (degrees) 2 (#%R'9Rv  
TSTY   2            -0.20000000     0.35349910    -0.19053324     0.20000000     0.35349910    -0.19053324 U8s&5~IPn  
Change in Focus                :       0.000000                            0.000000 ju%t'u\'  
Decenter X tolerance on surface 3 PXJ`<XM  
TSDX   3            -0.20000000     0.53419039    -0.00984195     0.20000000     0.53419039    -0.00984195 Y
MTB4|{  
Change in Focus                :       0.000000                            0.000000 Mg}8 3kS  
Decenter Y tolerance on surface 3 P1Chmg  
TSDY   3            -0.20000000     0.53419039    -0.00984195     0.20000000     0.53419039    -0.00984195 1pHt3Vc(G  
Change in Focus                :       0.000000                            0.000000 K_t!P  
Tilt X tolerance on surface (degrees) 3 _$YT*o@0J  
TSTX   3            -0.20000000     0.42861670    -0.11541563     0.20000000     0.42861670    -0.11541563 "8YXF
g  
Change in Focus                :       0.000000                            0.000000 268H!'!\  
Tilt Y tolerance on surface (degrees) 3 V=DT.u  
TSTY   3            -0.20000000     0.42861670    -0.11541563     0.20000000     0.42861670    -0.11541563 K^fH:pV  
Change in Focus                :       0.000000                            0.000000 k| Ye[GM*  
Irregularity of surface 1 in fringes  t_Rpeav  
TIRR   1            -0.20000000     0.50973587    -0.03429647     0.20000000     0.57333868     0.02930634 a0=5G>G9c  
Change in Focus                :       0.000000                            0.000000 T{Rhn V1  
Irregularity of surface 2 in fringes Lr}>Md  
TIRR   2            -0.20000000     0.53400904    -0.01002330     0.20000000     0.55360281     0.00957047 b+3QqbJ[F  
Change in Focus                :       0.000000                            0.000000 qD?-&>dBWi  
Irregularity of surface 3 in fringes 0'O*Y ]h+  
TIRR   3            -0.20000000     0.58078982     0.03675748     0.20000000     0.49904394    -0.04498840 XI*cu\7sy  
Change in Focus                :       0.000000                            0.000000 35X4] t  
Index tolerance on surface 1 H<bK9k)E  
TIND   1            -0.00100000     0.52606778    -0.01796456     0.00100000     0.56121811     0.01718578 XP'7+/A  
Change in Focus                :       0.000000                            0.000000 9Di@r!Db  
Index tolerance on surface 2 g4fe(.?c,  
TIND   2            -0.00100000     0.55639086     0.01235852     0.00100000     0.53126361    -0.01276872 5\|u] ~b  
Change in Focus                :       0.000000                           -0.000000 h,WF'X+  
`OWw<6`k  
Worst offenders: =9@t6   
Type                      Value      Criterion        Change ?E88y  
TSTY   2            -0.20000000     0.35349910    -0.19053324 KsMC+:`F  
TSTY   2             0.20000000     0.35349910    -0.19053324 >84:1`  
TSTX   2            -0.20000000     0.35349910    -0.19053324 i9%cpPrg8  
TSTX   2             0.20000000     0.35349910    -0.19053324 gkN )`/`*  
TSTY   1            -0.20000000     0.42678383    -0.11724851 _Bhm\|t  
TSTY   1             0.20000000     0.42678383    -0.11724851 j/+e5.EX/  
TSTX   1            -0.20000000     0.42678383    -0.11724851 aur4Ky> :  
TSTX   1             0.20000000     0.42678383    -0.11724851 9V5d=^  
TSTY   3            -0.20000000     0.42861670    -0.11541563 hRWRXC9  
TSTY   3             0.20000000     0.42861670    -0.11541563 $7bl,~Z  
2|C(|fD4  
Estimated Performance Changes based upon Root-Sum-Square method: j(SBpM  
Nominal MTF                 :     0.54403234 \L@DDK|"`6  
Estimated change            :    -0.36299231 a6&+>\o  
Estimated MTF               :     0.18104003 DD]e0 pa  
yDdi+  
Compensator Statistics: E")g1xGaK  
Change in back focus: '&#YaD=""  
Minimum            :        -0.000000 k_}aiHdG  
Maximum            :         0.000000 ca{u"n  
Mean               :        -0.000000 ^Td_B03)  
Standard Deviation :         0.000000 PF4"J^V  
+~~&FO2  
Monte Carlo Analysis: D+"
-(k  
Number of trials: 20 YrWC\HR_  
cii]-%J}c  
Initial Statistics: Normal Distribution rIg5Wcd  
8A3pYW-  
  Trial       Criterion        Change UZ"jQJQ  
      1     0.42804416    -0.11598818 Q5:8$ C}+  
Change in Focus                :      -0.400171 vS$_H<;P  
      2     0.54384387    -0.00018847 w6 x{<d  
Change in Focus                :       1.018470 s/"?P/R  
      3     0.44510003    -0.09893230 |d B`URP  
Change in Focus                :      -0.601922 Pfv| K;3i  
      4     0.18154684    -0.36248550 4tb y N  
Change in Focus                :       0.920681 +9[/> JM  
      5     0.28665820    -0.25737414 jbU=D:|  
Change in Focus                :       1.253875 dmkd.aP4  
      6     0.21263372    -0.33139862
#r ;;d(  
Change in Focus                :      -0.903878 ,py:e>+^t  
      7     0.40051424    -0.14351809 k]<E1 c/  
Change in Focus                :      -1.354815 Ym WVb  
      8     0.48754161    -0.05649072 U0Y;*
_>4  
Change in Focus                :       0.215922 .<Lbv5m  
      9     0.40357468    -0.14045766 AUk,sCxd  
Change in Focus                :       0.281783 L
=kc^dU  
     10     0.26315315    -0.28087919 nbGB84  
Change in Focus                :      -1.048393 wf= s-C  
     11     0.26120585    -0.28282649 
B)bq@jM  
Change in Focus                :       1.017611 _ `RCY^t  
     12     0.24033815    -0.30369419 69o,T
`B  
Change in Focus                :      -0.109292 <e s>FD  
     13     0.37164046    -0.17239188  GT)63|  
Change in Focus                :      -0.692430 5:o$]LkOWC  
     14     0.48597489    -0.05805744 *nPB+
@f  
Change in Focus                :      -0.662040 A* =r~T5B  
     15     0.21462327    -0.32940907 [9:'v@Ph  
Change in Focus                :       1.611296 *+-L`b{SX  
     16     0.43378226    -0.11025008 ?y@RE  
Change in Focus                :      -0.640081 Gw0_M&  
     17     0.39321881    -0.15081353 .[E"Kb}=  
Change in Focus                :       0.914906 45u\v2,C3  
     18     0.20692530    -0.33710703 $\DOy&e  
Change in Focus                :       0.801607 z DP  
     19     0.51374068    -0.03029165 FHu -';  
Change in Focus                :       0.947293 krw_1Mm  
     20     0.38013374    -0.16389860 Bj ~bsT@a.  
Change in Focus                :       0.667010 GomTec9.  
aa'u5<<W  
Number of traceable Monte Carlo files generated: 20 I4%p?'i,C  
0 tZ>yR  
Nominal     0.54403234 h#o3qY  
Best        0.54384387    Trial     2 yJ
heni  
Worst       0.18154684    Trial     4 f~RS[h`:  
Mean        0.35770970 &7{/ x~S{  
Std Dev     0.11156454 4r&S&^  
x*EzX4$x  
$8{|25 *E  
Compensator Statistics: d=TZaVL$$  
Change in back focus: _ 2WG6y;  
Minimum            :        -1.354815 P?y3YxS  
Maximum            :         1.611296 TJB)]d<  
Mean               :         0.161872 wO&edZ]zb^  
Standard Deviation :         0.869664 j#C1+Us  
$ON4nx  
90% >       0.20977951               x}`]9XQ  
80% >       0.22748071               .)7r /1o  
50% >       0.38667627               fVU9?^0/)9  
20% >       0.46553746               yC]xYn)  
10% >       0.50064115                R3G+tE/Y  
T4OH,^J  
End of Run. 
<h$Nh0  
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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 =*i
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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 Myl!tXawe8  
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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                 x>>#<hOz[  
80% >       0.22748071                 -8L22t  
50% >       0.38667627                 A
`=;yD  
20% >       0.46553746                 7,i}M  
10% >       0.50064115 o -< 5<  
X5@SLkJ-`  
最后这个数值是MTF值呢，还是MTF的公差？ b8?qYm  
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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？？？   Mp*S+Plp  
LvWl*:z  
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  : Z[.+Wd\)-9  
90% >       0.20977951                 _9Px
tf  
80% >       0.22748071                 xy@1E;  
50% >       0.38667627                 Sz\"*W;>  
20% >       0.46553746                 SZOcFmC?  
10% >       0.50064115 QjW7XVxB#N  
....... hcQvL>  

JHY0J &4s  
8:Yha4<Bv7  
这些数值都是MTF值

Criterion           : Geometric MTF average S&T at 30.0000 cycles per mm   1vTncU!  
Mode                : Sensitivities =<-tD<  
Sampling            : 2 >uN`q1?l'  
Nominal Criterion   : 0.54403234 O?uT'$GT  
Test Wavelength     : 0.6328 C;DNL^  
CroI,=a&,  
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？ qC9$xIWq  
,jWMJ0X/N=  
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