[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 k^J8 p#`6  
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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 y>I2}P  
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图片:2.jpg

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然后运行分析的结果如下： c4Ebre-Oa  
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Analysis of Tolerances HBlk~eZ  
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File : E:\光学设计资料\zemax练习\f500.ZMX K"#$",}=  
Title: 1-2hh)  
Date : TUE JUN 21 2011 0U '"@A \  
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Units are Millimeters. Rs%`6et}\  
All changes are computed using linear differences. 66yw[,Y  
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Paraxial Focus compensation only. =RoG?gd{R  
3BFOZV+  
WARNING: Solves should be removed prior to tolerancing. UcRP/LR%C  
TZn 15-O  
Mnemonics: %w;qu1j  
TFRN: Tolerance on curvature in fringes. hZ&KE78?  
TTHI: Tolerance on thickness. aJu&h2G  
TSDX: Tolerance on surface decentering in x. d:=' Xs
 
TSDY: Tolerance on surface decentering in y. ){^J8]b7#  
TSTX: Tolerance on surface tilt in x (degrees). ++cS^ Lo  
TSTY: Tolerance on surface tilt in y (degrees). r&gvP|W%  
TIRR: Tolerance on irregularity (fringes). @X==[gQ  
TIND: Tolerance on Nd index of refraction. NR4+&d  
TEDX: Tolerance on element decentering in x. w#A)B<Y/"  
TEDY: Tolerance on element decentering in y. ~ao:9ynY  
TETX: Tolerance on element tilt in x (degrees). $y(;"hy  
TETY: Tolerance on element tilt in y (degrees). *1|7%*!8  
b8mH.g&l  
WARNING: RAY AIMING IS OFF. Very loose tolerances may not be computed accurately. iT]t`7R  
56v G R(  
WARNING: Boundary constraints on compensators will be ignored. amBg<P`'_  
':*H#}Br-#  
Criterion           : Geometric MTF average S&T at 30.0000 cycles per mm R\j~X@vI  
Mode                : Sensitivities ,f }$FZ  
Sampling            : 2 6=iHw24  
Nominal Criterion   : 0.54403234 + G@N  
Test Wavelength     : 0.6328 ^Q/*on;A,/  
I2[U#4n  
<c+.%ka  
Fields: XY Symmetric Angle in degrees ?Ga8.0Z~KT  
#      X-Field      Y-Field       Weight    VDX    VDY    VCX    VCY X/5m}-6d]  
1   0.000E+000   0.000E+000   1.000E+000  0.000  0.000  0.000  0.000 C6!F6Stn]g  
oC0ndp~+&  
Sensitivity Analysis: X\^V{v^-  

W06aj ~7Z  
                 |----------------- Minimum ----------------| |----------------- Maximum ----------------| _CwTe=K}  
Type                      Value      Criterion        Change          Value      Criterion        Change d:kB Zrq  
Fringe tolerance on surface 1 }7 N6nZj`  
TFRN   1            -1.00000000     0.54257256    -0.00145977     1.00000000     0.54548607     0.00145374 4G&`&fff]  
Change in Focus                :      -0.000000                            0.000000 'zyw-1  
Fringe tolerance on surface 2 GVY7`k"km  
TFRN   2            -1.00000000     0.54177471    -0.00225762     1.00000000     0.54627463     0.00224230 >eJ<-3L;  
Change in Focus                :       0.000000                            0.000000 zsL@0]e&  
Fringe tolerance on surface 3 -/f$s1  
TFRN   3            -1.00000000     0.54779866     0.00376632     1.00000000     0.54022572    -0.00380662 fdl.3~.C  
Change in Focus                :      -0.000000                            0.000000 c_8&4  
Thickness tolerance on surface 1 0ho;L0Nr'  
TTHI   1   3        -0.20000000     0.54321462    -0.00081772     0.20000000     0.54484759     0.00081525 v$ ti=uk$  
Change in Focus                :       0.000000                            0.000000 ug3\K83aj/  
Thickness tolerance on surface 2 YWZ;@,W  
TTHI   2   3        -0.20000000     0.54478712     0.00075478     0.20000000     0.54327558    -0.00075675 n0(Q/  
Change in Focus                :       0.000000                           -0.000000 >0^<<=m  
Decenter X tolerance on surfaces 1 through 3 gV_v
5sk  
TEDX   1   3        -0.20000000     0.54401464   -1.7700E-005     0.20000000     0.54401464   -1.7700E-005 pH'_k k  
Change in Focus                :       0.000000                            0.000000 4X
kI? l  
Decenter Y tolerance on surfaces 1 through 3 *22Vc2[i;  
TEDY   1   3        -0.20000000     0.54401464   -1.7700E-005     0.20000000     0.54401464   -1.7700E-005 Tzq@ic#!B  
Change in Focus                :       0.000000                            0.000000 jJ$\WUQ.  
Tilt X tolerance on surfaces 1 through 3 (degrees) kK&w5'  
TETX   1   3        -0.20000000     0.54897548     0.00494314     0.20000000     0.54897548     0.00494314 ?sN{U\  
Change in Focus                :       0.000000                            0.000000 B[b>T=  
Tilt Y tolerance on surfaces 1 through 3 (degrees) -Vn#Ab_C  
TETY   1   3        -0.20000000     0.54897548     0.00494314     0.20000000     0.54897548     0.00494314 R)NSJ-A!2  
Change in Focus                :       0.000000                            0.000000 R1];P*>%gZ  
Decenter X tolerance on surface 1 =p5D

T  
TSDX   1            -0.20000000     0.53999563    -0.00403671     0.20000000     0.53999563    -0.00403671 BgQEd@cN  
Change in Focus                :       0.000000                            0.000000 mixsJ}
e  
Decenter Y tolerance on surface 1 `/O`%6,f1!  
TSDY   1            -0.20000000     0.53999563    -0.00403671     0.20000000     0.53999563    -0.00403671 Z?
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Change in Focus                :       0.000000                            0.000000 Ss[[V(-  
Tilt X tolerance on surface (degrees) 1 z8\YMr6o  
TSTX   1            -0.20000000     0.42678383    -0.11724851     0.20000000     0.42678383    -0.11724851 nFnM9 pdMK  
Change in Focus                :       0.000000                            0.000000 (Pc>D';{S  
Tilt Y tolerance on surface (degrees) 1 +x]/W|5  
TSTY   1            -0.20000000     0.42678383    -0.11724851     0.20000000     0.42678383    -0.11724851 g~hMOI?KK^  
Change in Focus                :       0.000000                            0.000000 c'oiW)8;A  
Decenter X tolerance on surface 2 O<S.fr,  
TSDX   2            -0.20000000     0.51705427    -0.02697807     0.20000000     0.51705427    -0.02697807 dq93P%X24  
Change in Focus                :       0.000000                            0.000000 5m8u:6kQu  
Decenter Y tolerance on surface 2 vJWBr:`L  
TSDY   2            -0.20000000     0.51705427    -0.02697807     0.20000000     0.51705427    -0.02697807 nCQtn%j't  
Change in Focus                :       0.000000                            0.000000 )Q2IYCj{  
Tilt X tolerance on surface (degrees) 2 "i0>>@NR'  
TSTX   2            -0.20000000     0.35349910    -0.19053324     0.20000000     0.35349910    -0.19053324 F0$w9p  
Change in Focus                :       0.000000                            0.000000 JFT$1^n  
Tilt Y tolerance on surface (degrees) 2 .}==p
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TSTY   2            -0.20000000     0.35349910    -0.19053324     0.20000000     0.35349910    -0.19053324 VN`.*B|9[  
Change in Focus                :       0.000000                            0.000000 3FBLCD3  
Decenter X tolerance on surface 3 ]az(w&vqg2  
TSDX   3            -0.20000000     0.53419039    -0.00984195     0.20000000     0.53419039    -0.00984195 H4g8 1V=  
Change in Focus                :       0.000000                            0.000000 h;V4|jM  
Decenter Y tolerance on surface 3 P
aCCUF  
TSDY   3            -0.20000000     0.53419039    -0.00984195     0.20000000     0.53419039    -0.00984195 hRf l\Q[  
Change in Focus                :       0.000000                            0.000000 wJC[[_"3 I  
Tilt X tolerance on surface (degrees) 3 ~ZKJ:&f  
TSTX   3            -0.20000000     0.42861670    -0.11541563     0.20000000     0.42861670    -0.11541563 K43%9=sM  
Change in Focus                :       0.000000                            0.000000 EGXvz)y  
Tilt Y tolerance on surface (degrees) 3 2Q6;SF"Z  
TSTY   3            -0.20000000     0.42861670    -0.11541563     0.20000000     0.42861670    -0.11541563 ng}C$d . I  
Change in Focus                :       0.000000                            0.000000 $qD\ku;'  
Irregularity of surface 1 in fringes sVHF\{<  
TIRR   1            -0.20000000     0.50973587    -0.03429647     0.20000000     0.57333868     0.02930634 $nt&'Xnv  
Change in Focus                :       0.000000                            0.000000 X4%uY  
Irregularity of surface 2 in fringes KqI:g*H'x7  
TIRR   2            -0.20000000     0.53400904    -0.01002330     0.20000000     0.55360281     0.00957047 :-?ZU4)  
Change in Focus                :       0.000000                            0.000000 ?+zFa2J  
Irregularity of surface 3 in fringes C19N0=  
TIRR   3            -0.20000000     0.58078982     0.03675748     0.20000000     0.49904394    -0.04498840 r=Xo;d*TE  
Change in Focus                :       0.000000                            0.000000 Q(& @ra!{  
Index tolerance on surface 1 O#)1zD}  
TIND   1            -0.00100000     0.52606778    -0.01796456     0.00100000     0.56121811     0.01718578 UarLxPQ  
Change in Focus                :       0.000000                            0.000000 |Y3w6!$  
Index tolerance on surface 2 5,Fq:j)MxW  
TIND   2            -0.00100000     0.55639086     0.01235852     0.00100000     0.53126361    -0.01276872 orjtwF>^  
Change in Focus                :       0.000000                           -0.000000 OAXA<  
nM[yBA  
Worst offenders: cL9gaD$;)  
Type                      Value      Criterion        Change Q.N!b7r7  
TSTY   2            -0.20000000     0.35349910    -0.19053324 [Hh*lKg  
TSTY   2             0.20000000     0.35349910    -0.19053324 MG?,,8sO  
TSTX   2            -0.20000000     0.35349910    -0.19053324 ;W- A2g  
TSTX   2             0.20000000     0.35349910    -0.19053324 [* <x)  
TSTY   1            -0.20000000     0.42678383    -0.11724851 =@U5/J  
TSTY   1             0.20000000     0.42678383    -0.11724851 ;EBKzB  
TSTX   1            -0.20000000     0.42678383    -0.11724851 /43l}6I  
TSTX   1             0.20000000     0.42678383    -0.11724851 ,`f]mv l  
TSTY   3            -0.20000000     0.42861670    -0.11541563 48:xvTE?N  
TSTY   3             0.20000000     0.42861670    -0.11541563 hO"!q;<eS  
aM~IRLmK  
Estimated Performance Changes based upon Root-Sum-Square method: T=PqA)Ym  
Nominal MTF                 :     0.54403234 wO]e%BTO  
Estimated change            :    -0.36299231 R+HX'W  
Estimated MTF               :     0.18104003 kL DpZ{  
_d 6'f8[&  
Compensator Statistics: CcQc!`YC  
Change in back focus: y i$+rPF1  
Minimum            :        -0.000000 ?^U?ua6  
Maximum            :         0.000000 m!ZY]:)$  
Mean               :        -0.000000 2E1`r@L  
Standard Deviation :         0.000000 J%?5d:iN+  
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Monte Carlo Analysis: p8'$@:M\  
Number of trials: 20 |OeWM  
UF-&L:s[  
Initial Statistics: Normal Distribution ~dS15E4-Pp  
NgTB4I8P  
  Trial       Criterion        Change  qNJc*@s  
      1     0.42804416    -0.11598818 S%- k
N;  
Change in Focus                :      -0.400171 Gwk$<6E  
      2     0.54384387    -0.00018847 kt6)F&;$  
Change in Focus                :       1.018470 v@EErF  
      3     0.44510003    -0.09893230 FO*Gc Z  
Change in Focus                :      -0.601922 @)d_z
WE  
      4     0.18154684    -0.36248550 P2vG)u  
Change in Focus                :       0.920681 )#i@DHt=  
      5     0.28665820    -0.25737414 M P8Sd1_=  
Change in Focus                :       1.253875 @ujwN([I  
      6     0.21263372    -0.33139862 wG49|!l6T  
Change in Focus                :      -0.903878 (RFH.iX  
      7     0.40051424    -0.14351809 $ 64up!  
Change in Focus                :      -1.354815 y'm!h?8  
      8     0.48754161    -0.05649072 ,ayEZ#4.m  
Change in Focus                :       0.215922 6J>AU  
      9     0.40357468    -0.14045766 Z[Tou  
Change in Focus                :       0.281783 iyn9[>j
e  
     10     0.26315315    -0.28087919 U)G.Bst  
Change in Focus                :      -1.048393 a <C?- g|  
     11     0.26120585    -0.28282649 eA7 Iv{M  
Change in Focus                :       1.017611 +ydd"`  
     12     0.24033815    -0.30369419 3RaW\cWzg  
Change in Focus                :      -0.109292 OMK,L:poC  
     13     0.37164046    -0.17239188 'i%r  
Change in Focus                :      -0.692430 WkXgz6 P  
     14     0.48597489    -0.05805744 x|m9?[ !_  
Change in Focus                :      -0.662040 H
Q@g6  
     15     0.21462327    -0.32940907 joI)6c  
Change in Focus                :       1.611296 >Lo\?X~  
     16     0.43378226    -0.11025008 Qa,
=  
Change in Focus                :      -0.640081 f- (i%  
     17     0.39321881    -0.15081353 d3:GmB .  
Change in Focus                :       0.914906 K T0t4XPM  
     18     0.20692530    -0.33710703 l_}d Q&R  
Change in Focus                :       0.801607 R%KF/1;/  
     19     0.51374068    -0.03029165 S L 5k^|  
Change in Focus                :       0.947293 Zp)=l Td  
     20     0.38013374    -0.16389860 s|WwB
T
 
Change in Focus                :       0.667010 R ABw(b  
<yipy[D  
Number of traceable Monte Carlo files generated: 20 RiQ]AsTtl  
42
]7N3:'  
Nominal     0.54403234 !p+54w\ 2  
Best        0.54384387    Trial     2 Hk*1Wrs*  
Worst       0.18154684    Trial     4 jh/,G5RM9  
Mean        0.35770970 by<@\n2B:U  
Std Dev     0.11156454 ?=9'?K/~a  
|OJWQU![by  
v82wnP-~7  
Compensator Statistics: X8ulaa  
Change in back focus: ZGZNZ}~#  
Minimum            :        -1.354815 8</wQ6&
|  
Maximum            :         1.611296 -Fd&rq:GB(  
Mean               :         0.161872 +4-T_m/W/  
Standard Deviation :         0.869664 ynmjIQ  
V~/G,3:0y%  
90% >       0.20977951               9" q-Bb  
80% >       0.22748071               dCi:@+z8  
50% >       0.38667627               6C&&="uww  
20% >       0.46553746               '$OUe {j<  
10% >       0.50064115                b;b,t0wS  
rhc+tR  
End of Run. _f0AV;S:vd  
x.-d)]a!  
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 Wa|V~PL+T  

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 D#LV&4e>.E  
l$/pp  
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                 0 SSdp<  
80% >       0.22748071                 Xd+H()nR  
50% >       0.38667627                 }i!+d,|f  
20% >       0.46553746                 Hi09?AX  
10% >       0.50064115 57q=  
Q|)>9m!tt  
最后这个数值是MTF值呢，还是MTF的公差？ ~3:VM_  
zufphS|  
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？？？   VwI  
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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  : |WaWmp(pQ  
90% >       0.20977951                 <zqIq9}r  
80% >       0.22748071                 er_6PV  
50% >       0.38667627                 'ij+MU1  
20% >       0.46553746                 nN&dtjoF  
10% >       0.50064115 p8 S~`fjV  
....... x9F*$G  

Mcc%&j
 
dXDyY  
这些数值都是MTF值

Criterion           : Geometric MTF average S&T at 30.0000 cycles per mm   ]foS.D,  
Mode                : Sensitivities 15_"U+O(/  
Sampling            : 2 )PR`irw  
Nominal Criterion   : 0.54403234 V+y|C[A F  
Test Wavelength     : 0.6328 %J6>Vc!ix=  
v"2A?  
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？ \|vo@E  
CNV^,`FX  
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