[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 9[c%J*r
 
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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 :'F}Dy  
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图片:2.jpg

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然后运行分析的结果如下： bwM@/g%DL  
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Analysis of Tolerances OA/WtQ5  
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File : E:\光学设计资料\zemax练习\f500.ZMX l {jmlT  
Title: R" )bDy?  
Date : TUE JUN 21 2011 +YLejjQ  
ae"]\a\&1o  
Units are Millimeters. hQ6a~?f  
All changes are computed using linear differences. N,2s?Y_!  
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Paraxial Focus compensation only. =[\s8XH,  
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WARNING: Solves should be removed prior to tolerancing. 'TH15r@  
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Mnemonics: 1&;QyTN  
TFRN: Tolerance on curvature in fringes. "s!7dKXI"  
TTHI: Tolerance on thickness. y2]-&]&  
TSDX: Tolerance on surface decentering in x. 8:BIbmtt5  
TSDY: Tolerance on surface decentering in y. g;$Xq)Dd  
TSTX: Tolerance on surface tilt in x (degrees). Yt|6 X:l  
TSTY: Tolerance on surface tilt in y (degrees). 63`{.yZ*z  
TIRR: Tolerance on irregularity (fringes). o?1;<gs  
TIND: Tolerance on Nd index of refraction. .s+aZwTMT  
TEDX: Tolerance on element decentering in x. 322jR4QGr  
TEDY: Tolerance on element decentering in y. `qd+f{Q  
TETX: Tolerance on element tilt in x (degrees). uVzFsgBp  
TETY: Tolerance on element tilt in y (degrees). <E\$3Ym9  
5JEbe   
WARNING: RAY AIMING IS OFF. Very loose tolerances may not be computed accurately. '1
3ZX:  
sY?,0T_m  
WARNING: Boundary constraints on compensators will be ignored. V=fEPM  
mUS_(0q  
Criterion           : Geometric MTF average S&T at 30.0000 cycles per mm :qChMU|Y6  
Mode                : Sensitivities 5_XV%-wM  
Sampling            : 2 &Tl 0Pf  
Nominal Criterion   : 0.54403234 z
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Test Wavelength     : 0.6328 pv^O"Bs  
'*\|;l#1  
>^XBa*4;Y  
Fields: XY Symmetric Angle in degrees z]b>VpW:  
#      X-Field      Y-Field       Weight    VDX    VDY    VCX    VCY #2r}?hP/m  
1   0.000E+000   0.000E+000   1.000E+000  0.000  0.000  0.000  0.000 >#,G}xf  
v1a6?-  
Sensitivity Analysis: Qs9gTBS;  
CR6R?R3b  
                 |----------------- Minimum ----------------| |----------------- Maximum ----------------| )M__ t5L  
Type                      Value      Criterion        Change          Value      Criterion        Change ~ek$
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Fringe tolerance on surface 1 ,+~rd4a  
TFRN   1            -1.00000000     0.54257256    -0.00145977     1.00000000     0.54548607     0.00145374 +cD!1IT:  
Change in Focus                :      -0.000000                            0.000000 F(t=!k,4\  
Fringe tolerance on surface 2 <dW]\h?)  
TFRN   2            -1.00000000     0.54177471    -0.00225762     1.00000000     0.54627463     0.00224230 rvr-XGK36\  
Change in Focus                :       0.000000                            0.000000 (@iMLuewK  
Fringe tolerance on surface 3 Oft4-4$E  
TFRN   3            -1.00000000     0.54779866     0.00376632     1.00000000     0.54022572    -0.00380662 n_3O-X(  
Change in Focus                :      -0.000000                            0.000000 1"pw  
Thickness tolerance on surface 1
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TTHI   1   3        -0.20000000     0.54321462    -0.00081772     0.20000000     0.54484759     0.00081525 Gs3LB/8?  
Change in Focus                :       0.000000                            0.000000 XJLQ{  
Thickness tolerance on surface 2 $95h2oXt  
TTHI   2   3        -0.20000000     0.54478712     0.00075478     0.20000000     0.54327558    -0.00075675 wn)JXR  
Change in Focus                :       0.000000                           -0.000000 L#vI=GpL,r  
Decenter X tolerance on surfaces 1 through 3 hEh}PX:  
TEDX   1   3        -0.20000000     0.54401464   -1.7700E-005     0.20000000     0.54401464   -1.7700E-005 }:Z#}8  
Change in Focus                :       0.000000                            0.000000 SPp#f~%m  
Decenter Y tolerance on surfaces 1 through 3 v@e~k-
#  
TEDY   1   3        -0.20000000     0.54401464   -1.7700E-005     0.20000000     0.54401464   -1.7700E-005 EvOJ~'2 Y%  
Change in Focus                :       0.000000                            0.000000 Mi]L]-L  
Tilt X tolerance on surfaces 1 through 3 (degrees) 61xs%kxb..  
TETX   1   3        -0.20000000     0.54897548     0.00494314     0.20000000     0.54897548     0.00494314 bQ~j=\[r  
Change in Focus                :       0.000000                            0.000000 +[5.WC7J  
Tilt Y tolerance on surfaces 1 through 3 (degrees) -eX5z  
TETY   1   3        -0.20000000     0.54897548     0.00494314     0.20000000     0.54897548     0.00494314 da (km+  
Change in Focus                :       0.000000                            0.000000 !qX_I db\  
Decenter X tolerance on surface 1 }#X8@  
TSDX   1            -0.20000000     0.53999563    -0.00403671     0.20000000     0.53999563    -0.00403671 e^ v.)  
Change in Focus                :       0.000000                            0.000000 6ND`l5  
Decenter Y tolerance on surface 1 qL,tYJ<m%  
TSDY   1            -0.20000000     0.53999563    -0.00403671     0.20000000     0.53999563    -0.00403671 dDF .qXq.  
Change in Focus                :       0.000000                            0.000000 AE} )o)B  
Tilt X tolerance on surface (degrees) 1 CZ nOui  
TSTX   1            -0.20000000     0.42678383    -0.11724851     0.20000000     0.42678383    -0.11724851 hUYd0qEbEt  
Change in Focus                :       0.000000                            0.000000 %'[&U#-  
Tilt Y tolerance on surface (degrees) 1 f%V4pzOc"  
TSTY   1            -0.20000000     0.42678383    -0.11724851     0.20000000     0.42678383    -0.11724851 A'2w>8  
Change in Focus                :       0.000000                            0.000000 .nyfYa+  
Decenter X tolerance on surface 2 Nj?/J47?,  
TSDX   2            -0.20000000     0.51705427    -0.02697807     0.20000000     0.51705427    -0.02697807 WD1G&5XP  
Change in Focus                :       0.000000                            0.000000  =|9H  
Decenter Y tolerance on surface 2 PG,_^QGCX  
TSDY   2            -0.20000000     0.51705427    -0.02697807     0.20000000     0.51705427    -0.02697807 qG<$Ajiin  
Change in Focus                :       0.000000                            0.000000 &LbJT$}V  
Tilt X tolerance on surface (degrees) 2 g&`pgmUX  
TSTX   2            -0.20000000     0.35349910    -0.19053324     0.20000000     0.35349910    -0.19053324 7U"[Gf  
Change in Focus                :       0.000000                            0.000000 Sv  &[f}S  
Tilt Y tolerance on surface (degrees) 2 Ek6MYc8<b~  
TSTY   2            -0.20000000     0.35349910    -0.19053324     0.20000000     0.35349910    -0.19053324 %JLk$sP9y`  
Change in Focus                :       0.000000                            0.000000 /z}~zO  
Decenter X tolerance on surface 3 zToq^T  
TSDX   3            -0.20000000     0.53419039    -0.00984195     0.20000000     0.53419039    -0.00984195 ,mj@sC>  
Change in Focus                :       0.000000                            0.000000 JJ%ePgWT  
Decenter Y tolerance on surface 3 *k19LI.5  
TSDY   3            -0.20000000     0.53419039    -0.00984195     0.20000000     0.53419039    -0.00984195 ai{Sa U  
Change in Focus                :       0.000000                            0.000000 S%Us5`sd  
Tilt X tolerance on surface (degrees) 3 yV"ZRrjO'Z  
TSTX   3            -0.20000000     0.42861670    -0.11541563     0.20000000     0.42861670    -0.11541563 e#E2>Bj;  
Change in Focus                :       0.000000                            0.000000 ;INW`b~  
Tilt Y tolerance on surface (degrees) 3 O)"gS!,  
TSTY   3            -0.20000000     0.42861670    -0.11541563     0.20000000     0.42861670    -0.11541563 %?m$`9yU  
Change in Focus                :       0.000000                            0.000000 rfq;%C  
Irregularity of surface 1 in fringes 2z|*xS'G  
TIRR   1            -0.20000000     0.50973587    -0.03429647     0.20000000     0.57333868     0.02930634 ?.YOI.U^  
Change in Focus                :       0.000000                            0.000000 v{A KEX*  
Irregularity of surface 2 in fringes .j-IX1Sa  
TIRR   2            -0.20000000     0.53400904    -0.01002330     0.20000000     0.55360281     0.00957047 k68F-e[i^  
Change in Focus                :       0.000000                            0.000000 `P9XqWr  
Irregularity of surface 3 in fringes U{VCZ*0cj  
TIRR   3            -0.20000000     0.58078982     0.03675748     0.20000000     0.49904394    -0.04498840 A*um{E+  
Change in Focus                :       0.000000                            0.000000 -e8}Pm "  
Index tolerance on surface 1 KjQR$-  
TIND   1            -0.00100000     0.52606778    -0.01796456     0.00100000     0.56121811     0.01718578 Ovj^IjG-`  
Change in Focus                :       0.000000                            0.000000 RoyPrO [3  
Index tolerance on surface 2 S*n@81Z  
TIND   2            -0.00100000     0.55639086     0.01235852     0.00100000     0.53126361    -0.01276872 NM06QzE  
Change in Focus                :       0.000000                           -0.000000 /FIE:Io  
W]nSR RWco  
Worst offenders: J2^'Xj_V  
Type                      Value      Criterion        Change 3}/&w\$  
TSTY   2            -0.20000000     0.35349910    -0.19053324 q#8[  
TSTY   2             0.20000000     0.35349910    -0.19053324 0D&t!$Ibf  
TSTX   2            -0.20000000     0.35349910    -0.19053324 ~}+Hgi  
TSTX   2             0.20000000     0.35349910    -0.19053324 Dre]AsgiV  
TSTY   1            -0.20000000     0.42678383    -0.11724851 ]GRWnif  
TSTY   1             0.20000000     0.42678383    -0.11724851 Y_
QH&GZ  
TSTX   1            -0.20000000     0.42678383    -0.11724851 ? 8LXP  
TSTX   1             0.20000000     0.42678383    -0.11724851 ma((2My'H  
TSTY   3            -0.20000000     0.42861670    -0.11541563 tuhA 9}E  
TSTY   3             0.20000000     0.42861670    -0.11541563 GxKqD;;u?=  
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Estimated Performance Changes based upon Root-Sum-Square method: beu\cV3  
Nominal MTF                 :     0.54403234 qu-/"w<3$  
Estimated change            :    -0.36299231 DrO2y  
Estimated MTF               :     0.18104003 +mp@b942*  
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Compensator Statistics: )'4k|@8|  
Change in back focus: Mv6-|O  
Minimum            :        -0.000000 TEaJG9RU>v  
Maximum            :         0.000000 IzpZwx^3''  
Mean               :        -0.000000 1+U  
Standard Deviation :         0.000000 /=gOa\k|p  
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Monte Carlo Analysis: x(eb5YS  
Number of trials: 20 z d-Tv`L#  
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Initial Statistics: Normal Distribution >b]S3[Q(  
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  Trial       Criterion        Change x*Y@Q?`>5W  
      1     0.42804416    -0.11598818 4'LB7}WG  
Change in Focus                :      -0.400171 )-`;1ca)s  
      2     0.54384387    -0.00018847 b%S62(qP  
Change in Focus                :       1.018470 %,k][V  
      3     0.44510003    -0.09893230 XGkkB  
Change in Focus                :      -0.601922 p^'3Odd|O  
      4     0.18154684    -0.36248550 j<)9dEM'  
Change in Focus                :       0.920681 |e2be1LD  
      5     0.28665820    -0.25737414 y})70w@+_  
Change in Focus                :       1.253875 (bh95X  
      6     0.21263372    -0.33139862 I;1lX L  
Change in Focus                :      -0.903878 Z>^pCc\lH  
      7     0.40051424    -0.14351809 ryFxn|4  
Change in Focus                :      -1.354815 #Z<a  
      8     0.48754161    -0.05649072 J|w)&bV  
Change in Focus                :       0.215922 `ck$t5:6sp  
      9     0.40357468    -0.14045766 ]TyisaT  
Change in Focus                :       0.281783 .({smN,B
  
     10     0.26315315    -0.28087919 Ey4z.s'-l  
Change in Focus                :      -1.048393 P'O#I}Dmw<  
     11     0.26120585    -0.28282649 8{Fsm;UsY  
Change in Focus                :       1.017611 HO''&hz  
     12     0.24033815    -0.30369419 /0eYMG+K=  
Change in Focus                :      -0.109292 J:kmqk!  
     13     0.37164046    -0.17239188 @, Wvvh  
Change in Focus                :      -0.692430 T0]*{k(FR  
     14     0.48597489    -0.05805744 w&x!,yd;  
Change in Focus                :      -0.662040 {je-I9%OK  
     15     0.21462327    -0.32940907 g{P%s'%*  
Change in Focus                :       1.611296 _Y[jyD1>  
     16     0.43378226    -0.11025008 +r<0zh,n.  
Change in Focus                :      -0.640081 bk\yCt06y;  
     17     0.39321881    -0.15081353 5efpeu  
Change in Focus                :       0.914906 A+UU~?3y  
     18     0.20692530    -0.33710703 ,DZX$Ug~+E  
Change in Focus                :       0.801607 uy}%0vLo  
     19     0.51374068    -0.03029165 +tD[9b! m  
Change in Focus                :       0.947293 }@^4,FKJ  
     20     0.38013374    -0.16389860 Q"7Gy<  
Change in Focus                :       0.667010 d`/tE?Gw  
is@b&V]  
Number of traceable Monte Carlo files generated: 20 _{ZqO;[u  
L*x[?x;)@  
Nominal     0.54403234 MX ;J5(Ae  
Best        0.54384387    Trial     2 i}~SDY  
Worst       0.18154684    Trial     4 0p@k({]<  
Mean        0.35770970 E.U
_W  
Std Dev     0.11156454 Q[d}J+l4{  
(X?/"lC)  
+d%L\^?F  
Compensator Statistics: +L5\;  
Change in back focus: LvEnXS  
Minimum            :        -1.354815 B)QHM+[=F  
Maximum            :         1.611296 %/rMg"f:  
Mean               :         0.161872 K_ci_g":  
Standard Deviation :         0.869664 MW+b;0U`#  
xrN &N_K#  
90% >       0.20977951               ''kS*3  
80% >       0.22748071               41_SRh7N  
50% >       0.38667627               |qoKO:B4-[  
20% >       0.46553746               "hQ_sgz[Z  
10% >       0.50064115                ;q1A*f\:#  
":nQgV\9  
End of Run. <u=4*:QE  
mB\C
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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 .%82P(  

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 @l0|*lo%  
8Mbeg ,P  
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                 Gc$gJnQio  
80% >       0.22748071                 K]xa/G(  
50% >       0.38667627                 :ZDMNhUl &  
20% >       0.46553746                 {ccIxL /~  
10% >       0.50064115 U'*t~x<  
{>bW>RO)  
最后这个数值是MTF值呢，还是MTF的公差？ =\{\g7  
pDhse2  
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？？？   DKmZ  
R3X{:1{j  
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  : hF&}lPVtv  
90% >       0.20977951                 (!?K7<Jv  
80% >       0.22748071                 q\9d6u=Gm  
50% >       0.38667627                 4-v6=gz.  
20% >       0.46553746                 R UTnc  
10% >       0.50064115 ,,=apyr#&  
....... g2p"LWex-  

gd6Dm4q(  
Ov9Q?8KzM  
这些数值都是MTF值

Criterion           : Geometric MTF average S&T at 30.0000 cycles per mm   5^)_B;.f  
Mode                : Sensitivities </E>tMW  
Sampling            : 2 PCfo  
Nominal Criterion   : 0.54403234 Ttv9"z  
Test Wavelength     : 0.6328 4Nmea-!*  
\3PE+$  
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？ 8sw,k   
T{-2fp8r[  
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