[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 PDiorW}]k  
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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 _J#Hq 'K  
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图片:2.jpg

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然后运行分析的结果如下： NQ{Z
   
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Analysis of Tolerances 7 @Qlp$[F  
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File : E:\光学设计资料\zemax练习\f500.ZMX HCZ%DBU96  
Title: ^hTJp{  
Date : TUE JUN 21 2011 =|^W]2W$  
 Z~:lfCK`  
Units are Millimeters. )%W2XvG  
All changes are computed using linear differences. /60=N`i  
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Paraxial Focus compensation only. W..>Ny;'3  
t$Ji{t-  
WARNING: Solves should be removed prior to tolerancing. um4zLsd#v  
:Gk~FRA|  
Mnemonics: ^Rh~+  
TFRN: Tolerance on curvature in fringes. 3W00,f^9  
TTHI: Tolerance on thickness. JVYYwA^.  
TSDX: Tolerance on surface decentering in x. ))zaL2UP.  
TSDY: Tolerance on surface decentering in y. 745PCC'FK  
TSTX: Tolerance on surface tilt in x (degrees). 6:X\vw  
TSTY: Tolerance on surface tilt in y (degrees). T7X2$ '  
TIRR: Tolerance on irregularity (fringes). =hb87g.  
TIND: Tolerance on Nd index of refraction. f)fw87UPc  
TEDX: Tolerance on element decentering in x. f;6d/?=~  
TEDY: Tolerance on element decentering in y. *m/u3.\  
TETX: Tolerance on element tilt in x (degrees). LxGh *7K-  
TETY: Tolerance on element tilt in y (degrees). UeTp,  
Y&%0 eI!  
WARNING: RAY AIMING IS OFF. Very loose tolerances may not be computed accurately. 6<O]_HZ&  

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WARNING: Boundary constraints on compensators will be ignored. a];i4lt(c  
rI$10R$+H  
Criterion           : Geometric MTF average S&T at 30.0000 cycles per mm $fG/gYvI\  
Mode                : Sensitivities ZPFTNwf  
Sampling            : 2 K~N[^pF  
Nominal Criterion   : 0.54403234 <\ c8q3N  
Test Wavelength     : 0.6328 mjc:0hH  
S'fq/`2g6  
LLN^^>5|l  
Fields: XY Symmetric Angle in degrees k82LCV+6  
#      X-Field      Y-Field       Weight    VDX    VDY    VCX    VCY bm|8Jbsb&  
1   0.000E+000   0.000E+000   1.000E+000  0.000  0.000  0.000  0.000 ~|]\.^B  
*]u/,wCB  
Sensitivity Analysis: 2?&ptN)`N  
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                 |----------------- Minimum ----------------| |----------------- Maximum ----------------| [#H8Mb+7  
Type                      Value      Criterion        Change          Value      Criterion        Change eu/Sp3@v  
Fringe tolerance on surface 1 1.CYs<  
TFRN   1            -1.00000000     0.54257256    -0.00145977     1.00000000     0.54548607     0.00145374 ,\"gN5[$(  
Change in Focus                :      -0.000000                            0.000000 =-Tetp  
Fringe tolerance on surface 2 < ,n4|z)  
TFRN   2            -1.00000000     0.54177471    -0.00225762     1.00000000     0.54627463     0.00224230 XS@6jbLE  
Change in Focus                :       0.000000                            0.000000 oZw#Nd  
Fringe tolerance on surface 3 53
xq%  
TFRN   3            -1.00000000     0.54779866     0.00376632     1.00000000     0.54022572    -0.00380662 SJe;T  
Change in Focus                :      -0.000000                            0.000000 u{^Kyo#v  
Thickness tolerance on surface 1 )`0 j\  
TTHI   1   3        -0.20000000     0.54321462    -0.00081772     0.20000000     0.54484759     0.00081525 HRh".!lxy  
Change in Focus                :       0.000000                            0.000000 \6L=^q=  
Thickness tolerance on surface 2 EwsJa3 `  
TTHI   2   3        -0.20000000     0.54478712     0.00075478     0.20000000     0.54327558    -0.00075675 j'cS_R  
Change in Focus                :       0.000000                           -0.000000 rZ7 Ihof  
Decenter X tolerance on surfaces 1 through 3 =@
RVLml  
TEDX   1   3        -0.20000000     0.54401464   -1.7700E-005     0.20000000     0.54401464   -1.7700E-005 Ac%K+Pgk.
 
Change in Focus                :       0.000000                            0.000000 T9yW# .  
Decenter Y tolerance on surfaces 1 through 3 =$J2  
TEDY   1   3        -0.20000000     0.54401464   -1.7700E-005     0.20000000     0.54401464   -1.7700E-005 y+<HS]vyV  
Change in Focus                :       0.000000                            0.000000 4T-AWk  
Tilt X tolerance on surfaces 1 through 3 (degrees) qlP=Y .H  
TETX   1   3        -0.20000000     0.54897548     0.00494314     0.20000000     0.54897548     0.00494314 [sRQd;+  
Change in Focus                :       0.000000                            0.000000 '-qc\6UY  
Tilt Y tolerance on surfaces 1 through 3 (degrees) C7:Ry)8'I  
TETY   1   3        -0.20000000     0.54897548     0.00494314     0.20000000     0.54897548     0.00494314  ~I74'  
Change in Focus                :       0.000000                            0.000000 irS62Xe  
Decenter X tolerance on surface 1 N\$6R-L  
TSDX   1            -0.20000000     0.53999563    -0.00403671     0.20000000     0.53999563    -0.00403671 R8)"M(u=l  
Change in Focus                :       0.000000                            0.000000 o
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Decenter Y tolerance on surface 1 Qw+">  
TSDY   1            -0.20000000     0.53999563    -0.00403671     0.20000000     0.53999563    -0.00403671 &,xM;8b  
Change in Focus                :       0.000000                            0.000000 ^TGHWCK!t  
Tilt X tolerance on surface (degrees) 1 ?*0kQo'  
TSTX   1            -0.20000000     0.42678383    -0.11724851     0.20000000     0.42678383    -0.11724851 gsAO<Fy  
Change in Focus                :       0.000000                            0.000000 ,v+SD\7|  
Tilt Y tolerance on surface (degrees) 1 fyeS)  
TSTY   1            -0.20000000     0.42678383    -0.11724851     0.20000000     0.42678383    -0.11724851 kp|reKM/  
Change in Focus                :       0.000000                            0.000000 <Lt$qV-#  
Decenter X tolerance on surface 2 #,Y}  
TSDX   2            -0.20000000     0.51705427    -0.02697807     0.20000000     0.51705427    -0.02697807 Z:{Z&HQC  
Change in Focus                :       0.000000                            0.000000 qZ.\GHS  
Decenter Y tolerance on surface 2 L $
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TSDY   2            -0.20000000     0.51705427    -0.02697807     0.20000000     0.51705427    -0.02697807 l/5/|UE9  
Change in Focus                :       0.000000                            0.000000 S/|8'x{<  
Tilt X tolerance on surface (degrees) 2 Fu$otMw%l  
TSTX   2            -0.20000000     0.35349910    -0.19053324     0.20000000     0.35349910    -0.19053324 Sy
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Change in Focus                :       0.000000                            0.000000 idq= US  
Tilt Y tolerance on surface (degrees) 2 YH
9BJ  
TSTY   2            -0.20000000     0.35349910    -0.19053324     0.20000000     0.35349910    -0.19053324 @{G(.S  
Change in Focus                :       0.000000                            0.000000 ~F-,Q_|-  
Decenter X tolerance on surface 3 Fei$94a  
TSDX   3            -0.20000000     0.53419039    -0.00984195     0.20000000     0.53419039    -0.00984195 L[^e<I  
Change in Focus                :       0.000000                            0.000000 3ba"[C|  
Decenter Y tolerance on surface 3 (~~=<0S  
TSDY   3            -0.20000000     0.53419039    -0.00984195     0.20000000     0.53419039    -0.00984195 ,~!lNyL  
Change in Focus                :       0.000000                            0.000000 4^r}&9C~  
Tilt X tolerance on surface (degrees) 3 h?b{{  
TSTX   3            -0.20000000     0.42861670    -0.11541563     0.20000000     0.42861670    -0.11541563 R;%iu0  
Change in Focus                :       0.000000                            0.000000 9bB~r[k  
Tilt Y tolerance on surface (degrees) 3 RB!g
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TSTY   3            -0.20000000     0.42861670    -0.11541563     0.20000000     0.42861670    -0.11541563 &fcRVku  
Change in Focus                :       0.000000                            0.000000 TL
5bX+  
Irregularity of surface 1 in fringes S/4kfsN  
TIRR   1            -0.20000000     0.50973587    -0.03429647     0.20000000     0.57333868     0.02930634 l6~eb=u;9g  
Change in Focus                :       0.000000                            0.000000 qr*/}F6  
Irregularity of surface 2 in fringes udB}`<Q  
TIRR   2            -0.20000000     0.53400904    -0.01002330     0.20000000     0.55360281     0.00957047 4d#W[  
Change in Focus                :       0.000000                            0.000000 |7argk+  
Irregularity of surface 3 in fringes vc<8ApK3V  
TIRR   3            -0.20000000     0.58078982     0.03675748     0.20000000     0.49904394    -0.04498840 rr*IIG&.5  
Change in Focus                :       0.000000                            0.000000 eNNK;xXe#  
Index tolerance on surface 1 lxeolDl  
TIND   1            -0.00100000     0.52606778    -0.01796456     0.00100000     0.56121811     0.01718578 U*Q$:%72vO  
Change in Focus                :       0.000000                            0.000000 #KIHq2:.4  
Index tolerance on surface 2 SFjN5u  
TIND   2            -0.00100000     0.55639086     0.01235852     0.00100000     0.53126361    -0.01276872 nm)F tX|A  
Change in Focus                :       0.000000                           -0.000000 l"+=z.l6;  
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Worst offenders: #>0nNR[$Y  
Type                      Value      Criterion        Change 8ViDh  
TSTY   2            -0.20000000     0.35349910    -0.19053324 +mY(6|1  
TSTY   2             0.20000000     0.35349910    -0.19053324 *]LM2
J  
TSTX   2            -0.20000000     0.35349910    -0.19053324 09F
r1PL  
TSTX   2             0.20000000     0.35349910    -0.19053324 uW]n3)7<I  
TSTY   1            -0.20000000     0.42678383    -0.11724851 YRK4l\_`  
TSTY   1             0.20000000     0.42678383    -0.11724851 ;RR)C@n1  
TSTX   1            -0.20000000     0.42678383    -0.11724851 7L!k9"X`0F  
TSTX   1             0.20000000     0.42678383    -0.11724851 )3;S;b  
TSTY   3            -0.20000000     0.42861670    -0.11541563 Co'dZd(  
TSTY   3             0.20000000     0.42861670    -0.11541563 TPrwC~\B/  
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Estimated Performance Changes based upon Root-Sum-Square method: }&=C*5JN  
Nominal MTF                 :     0.54403234 G B15  
Estimated change            :    -0.36299231 Z'\_YbB  
Estimated MTF               :     0.18104003 <_D+'[  
1&dWt_\  
Compensator Statistics: [P^ .=F  
Change in back focus: &ha39&I  
Minimum            :        -0.000000 |2mEowAd  
Maximum            :         0.000000 JLjx4B\  
Mean               :        -0.000000 rn(
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Standard Deviation :         0.000000 (*|hlD~  
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Monte Carlo Analysis: "2 Kh2[K  
Number of trials: 20 O:1YG$uKa  
o/Z?/alt4  
Initial Statistics: Normal Distribution smSUo/  
wL:3RZB  
  Trial       Criterion        Change !4|7U\;  
      1     0.42804416    -0.11598818 %zWtPxAf  
Change in Focus                :      -0.400171 -gzk,ymp  
      2     0.54384387    -0.00018847 .7oz  
Change in Focus                :       1.018470 ]]Wa.P~]O  
      3     0.44510003    -0.09893230 #SO9e.yhI  
Change in Focus                :      -0.601922 `S%pD.g,2  
      4     0.18154684    -0.36248550 hse$M\5  
Change in Focus                :       0.920681 z7NaW e  
      5     0.28665820    -0.25737414 ~}uTC36C\  
Change in Focus                :       1.253875 %KqXt
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      6     0.21263372    -0.33139862 ,<%],-Lt[  
Change in Focus                :      -0.903878 4\t9(_  
      7     0.40051424    -0.14351809 m#Rll[  
Change in Focus                :      -1.354815 @@+\  
      8     0.48754161    -0.05649072 `a] /e  
Change in Focus                :       0.215922 fk=_ Y  
      9     0.40357468    -0.14045766 iMF:~H-Yq#  
Change in Focus                :       0.281783 d<xBI,g
  
     10     0.26315315    -0.28087919 Zx3m$.8  
Change in Focus                :      -1.048393 pm^[ve  
     11     0.26120585    -0.28282649 s@0#w*N  
Change in Focus                :       1.017611 CB|Z~_Bm  
     12     0.24033815    -0.30369419 -
V(5U!^B  
Change in Focus                :      -0.109292 U)N;=gr\  
     13     0.37164046    -0.17239188 |XPT2eQ{  
Change in Focus                :      -0.692430 k{uc%6s  
     14     0.48597489    -0.05805744 w_6h $"^x  
Change in Focus                :      -0.662040 LvB-%@n  
     15     0.21462327    -0.32940907 \ 3ha  
Change in Focus                :       1.611296 7u0!Q\  
     16     0.43378226    -0.11025008 ._#|h5  
Change in Focus                :      -0.640081 @va6,^)  
     17     0.39321881    -0.15081353 >!?u8^C  
Change in Focus                :       0.914906 ?NJ\l5'  
     18     0.20692530    -0.33710703 5ZUqCl(PX)  
Change in Focus                :       0.801607 )0YMi!&j`  
     19     0.51374068    -0.03029165 AS~O*(po  
Change in Focus                :       0.947293 %*zgN[/w  
     20     0.38013374    -0.16389860 *SLv$A  
Change in Focus                :       0.667010 I@e{>}  
Vc}m_T]O  
Number of traceable Monte Carlo files generated: 20 1jO/"d.8n  
S'lZ'H/  
Nominal     0.54403234 B]#0]-ua  
Best        0.54384387    Trial     2 Vf,t=$.[Q  
Worst       0.18154684    Trial     4 8nW#Q<s  
Mean        0.35770970 weKwBw  
Std Dev     0.11156454 :(N3s9:vz  
"2$
C_aE  
%3|0_  
Compensator Statistics: g#W)EXUR  
Change in back focus: zq8LQ4@ay  
Minimum            :        -1.354815 :voQ#f=  
Maximum            :         1.611296 *ix&"|h  
Mean               :         0.161872 |s+y]3-_  
Standard Deviation :         0.869664 AKejWh  
?=$a6o  
90% >       0.20977951               gM '_1zs U  
80% >       0.22748071               >XM-xK-=  
50% >       0.38667627               5F18/:\n  
20% >       0.46553746               k&
2U&  
10% >       0.50064115                ^g"G1,[%w  
4,`Yx s)%  
End of Run. ?v\A&d  
S)T~vK(n  
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 lo5,E(7~h  

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 )k&<D*5s  
mR)Xq=  
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                 ux`)jOQ`Y]  
80% >       0.22748071                 c5C 2xE}T  
50% >       0.38667627                 jeXP|;#Una  
20% >       0.46553746                 )WuU?Tn&  
10% >       0.50064115 t.Q}V5t{g  
#;~`+[y?\  
最后这个数值是MTF值呢，还是MTF的公差？ &\),V1"  

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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？？？   gT8Q:8f:  
Gmi ^2?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  : xgp 6lO[  
90% >       0.20977951                 WR|n>i@m  
80% >       0.22748071                 OKo)p`BX  
50% >       0.38667627                 S"=y>.#
 
20% >       0.46553746                 =`st1K  
10% >       0.50064115 mv,p*0  
....... 6Dl]d%
.  

}R&5Ye  
qX9x#92  
这些数值都是MTF值

Criterion           : Geometric MTF average S&T at 30.0000 cycles per mm   5mqwNAv  
Mode                : Sensitivities <sncW>?!~  
Sampling            : 2 "7z1V{ ;Y  
Nominal Criterion   : 0.54403234 kVRh/<s  
Test Wavelength     : 0.6328 e+~Q58oD  
P->.eo#VG  
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？ Jfs_9g5  
7=@3cw H  
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