[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 R9!U_RH  
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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 +(PUiiP'"v  
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图片:2.jpg

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然后运行分析的结果如下： %}e['d h  
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Analysis of Tolerances `S0`3q}L3%  
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File : E:\光学设计资料\zemax练习\f500.ZMX n_Qua|R  
Title: {Wi*B(  
Date : TUE JUN 21 2011 Np%Q-T\  
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Units are Millimeters. |'z24 :8  
All changes are computed using linear differences. NU3TXO  
L""ZI5J{F9  
Paraxial Focus compensation only. :;eQ*{ `\  
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WARNING: Solves should be removed prior to tolerancing. @_?2iN?4Z  
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Mnemonics: #/o~h|g  
TFRN: Tolerance on curvature in fringes. kDDC@A $  
TTHI: Tolerance on thickness. ;mT}Q;F#  
TSDX: Tolerance on surface decentering in x. -gm5Eqi  
TSDY: Tolerance on surface decentering in y. ZE-vroh  
TSTX: Tolerance on surface tilt in x (degrees). qxDMDMN  
TSTY: Tolerance on surface tilt in y (degrees). /]^Y\U^  
TIRR: Tolerance on irregularity (fringes). fgeh;cD  
TIND: Tolerance on Nd index of refraction. QS!Z*vG  
TEDX: Tolerance on element decentering in x. pS|K[:5  
TEDY: Tolerance on element decentering in y. sOlnc6  
TETX: Tolerance on element tilt in x (degrees). dW%t
ph  
TETY: Tolerance on element tilt in y (degrees). LRts W(A/  
3]GMQA{L)  
WARNING: RAY AIMING IS OFF. Very loose tolerances may not be computed accurately. D
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bm 4RR
I  
WARNING: Boundary constraints on compensators will be ignored. T[)!7@4r  
*asv^aFpS  
Criterion           : Geometric MTF average S&T at 30.0000 cycles per mm mvK^')  
Mode                : Sensitivities 0FtwDM))  
Sampling            : 2 q)L4*O  
Nominal Criterion   : 0.54403234 -fk;Qq3O  
Test Wavelength     : 0.6328 ge1. HG  
)WbWp4  
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2K82  
Fields: XY Symmetric Angle in degrees
:;.^r,QAI  
#      X-Field      Y-Field       Weight    VDX    VDY    VCX    VCY `WN80d\)&  
1   0.000E+000   0.000E+000   1.000E+000  0.000  0.000  0.000  0.000 ux
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:ujpLIjvVG  
Sensitivity Analysis: (_"Zbw%cJy  
IycZ\^5*-  
                 |----------------- Minimum ----------------| |----------------- Maximum ----------------| %jy$4qAf%  
Type                      Value      Criterion        Change          Value      Criterion        Change @;`'s  
Fringe tolerance on surface 1 &>C+5`bg  
TFRN   1            -1.00000000     0.54257256    -0.00145977     1.00000000     0.54548607     0.00145374 cI'n[G  
Change in Focus                :      -0.000000                            0.000000 NI#]#yM+  
Fringe tolerance on surface 2 _%=CW' B  
TFRN   2            -1.00000000     0.54177471    -0.00225762     1.00000000     0.54627463     0.00224230 OPDT:e86Y=  
Change in Focus                :       0.000000                            0.000000 'I&0$
<  
Fringe tolerance on surface 3 /0H}-i  
TFRN   3            -1.00000000     0.54779866     0.00376632     1.00000000     0.54022572    -0.00380662 s$isDG#Sr  
Change in Focus                :      -0.000000                            0.000000 Jh0Grq  
Thickness tolerance on surface 1 &TBF
t;  
TTHI   1   3        -0.20000000     0.54321462    -0.00081772     0.20000000     0.54484759     0.00081525 babL.Ua8o  
Change in Focus                :       0.000000                            0.000000 %L*EB;nK  
Thickness tolerance on surface 2 W/bW=.d Jd  
TTHI   2   3        -0.20000000     0.54478712     0.00075478     0.20000000     0.54327558    -0.00075675 CTW\Dt5
 
Change in Focus                :       0.000000                           -0.000000 Qgj# k  
Decenter X tolerance on surfaces 1 through 3 =DJ:LmK  
TEDX   1   3        -0.20000000     0.54401464   -1.7700E-005     0.20000000     0.54401464   -1.7700E-005 }n4 T!N  
Change in Focus                :       0.000000                            0.000000 (O4oIU  
Decenter Y tolerance on surfaces 1 through 3 qWheoyAB  
TEDY   1   3        -0.20000000     0.54401464   -1.7700E-005     0.20000000     0.54401464   -1.7700E-005 17Cb{Q  
Change in Focus                :       0.000000                            0.000000 e O\72? K  
Tilt X tolerance on surfaces 1 through 3 (degrees) 6!"wiM"]  
TETX   1   3        -0.20000000     0.54897548     0.00494314     0.20000000     0.54897548     0.00494314 cyJ{AS+  
Change in Focus                :       0.000000                            0.000000 v,ZYh w  
Tilt Y tolerance on surfaces 1 through 3 (degrees) ?-<lIFFh  
TETY   1   3        -0.20000000     0.54897548     0.00494314     0.20000000     0.54897548     0.00494314 4F|79U #  
Change in Focus                :       0.000000                            0.000000 IS&qFi}W|W  
Decenter X tolerance on surface 1 KhfADqji|  
TSDX   1            -0.20000000     0.53999563    -0.00403671     0.20000000     0.53999563    -0.00403671 
KJ'ID  
Change in Focus                :       0.000000                            0.000000 8C@u+tx  
Decenter Y tolerance on surface 1 5<dg@,\  
TSDY   1            -0.20000000     0.53999563    -0.00403671     0.20000000     0.53999563    -0.00403671 \L(cFjLIl  
Change in Focus                :       0.000000                            0.000000 l;_IH|A  
Tilt X tolerance on surface (degrees) 1 /S"jO[n9b  
TSTX   1            -0.20000000     0.42678383    -0.11724851     0.20000000     0.42678383    -0.11724851 t<Yi!6  
Change in Focus                :       0.000000                            0.000000 GLtd<M"  
Tilt Y tolerance on surface (degrees) 1 )~wKRyQff  
TSTY   1            -0.20000000     0.42678383    -0.11724851     0.20000000     0.42678383    -0.11724851 1OMXg=Y  
Change in Focus                :       0.000000                            0.000000 XeI2<=@%  
Decenter X tolerance on surface 2 c EYHB1*cT  
TSDX   2            -0.20000000     0.51705427    -0.02697807     0.20000000     0.51705427    -0.02697807 y<Q"]H.CkQ  
Change in Focus                :       0.000000                            0.000000 H9(?yI@Zr#  
Decenter Y tolerance on surface 2 /ovVS6Ai  
TSDY   2            -0.20000000     0.51705427    -0.02697807     0.20000000     0.51705427    -0.02697807 Dhn7N8(LF!  
Change in Focus                :       0.000000                            0.000000 J;>epM;*  
Tilt X tolerance on surface (degrees) 2 "iK= 8  
TSTX   2            -0.20000000     0.35349910    -0.19053324     0.20000000     0.35349910    -0.19053324 HXa[0VOx  
Change in Focus                :       0.000000                            0.000000 dR]-R/1|  
Tilt Y tolerance on surface (degrees) 2 E)$>t}$  
TSTY   2            -0.20000000     0.35349910    -0.19053324     0.20000000     0.35349910    -0.19053324 gU
ru=p  
Change in Focus                :       0.000000                            0.000000 D8wf`RUt  
Decenter X tolerance on surface 3 pNb2t/8%%  
TSDX   3            -0.20000000     0.53419039    -0.00984195     0.20000000     0.53419039    -0.00984195 ^<OYW|q?\r  
Change in Focus                :       0.000000                            0.000000 G^W0!
u,@  
Decenter Y tolerance on surface 3 '%rT]u3U  
TSDY   3            -0.20000000     0.53419039    -0.00984195     0.20000000     0.53419039    -0.00984195 =NtHV4=b  
Change in Focus                :       0.000000                            0.000000 gPKf8{#%e  
Tilt X tolerance on surface (degrees) 3 8<C*D".T$  
TSTX   3            -0.20000000     0.42861670    -0.11541563     0.20000000     0.42861670    -0.11541563 c9-$^yno  
Change in Focus                :       0.000000                            0.000000 %i9 e<.Ot  
Tilt Y tolerance on surface (degrees) 3 qS+;u`s  
TSTY   3            -0.20000000     0.42861670    -0.11541563     0.20000000     0.42861670    -0.11541563 y{hg4|\  
Change in Focus                :       0.000000                            0.000000 8D )nM|  
Irregularity of surface 1 in fringes =o##z5j K  
TIRR   1            -0.20000000     0.50973587    -0.03429647     0.20000000     0.57333868     0.02930634 4]U=Y>\Sr  
Change in Focus                :       0.000000                            0.000000 (&e!u{I  
Irregularity of surface 2 in fringes SCcvU4`o  
TIRR   2            -0.20000000     0.53400904    -0.01002330     0.20000000     0.55360281     0.00957047 5)%ahmY  
Change in Focus                :       0.000000                            0.000000 H]/~ #a  
Irregularity of surface 3 in fringes Dds-;9  
TIRR   3            -0.20000000     0.58078982     0.03675748     0.20000000     0.49904394    -0.04498840 >)ekb7  
Change in Focus                :       0.000000                            0.000000 ;0 B1P|7zK  
Index tolerance on surface 1 z
,TH}s6  
TIND   1            -0.00100000     0.52606778    -0.01796456     0.00100000     0.56121811     0.01718578 Qfm$q~`D^W  
Change in Focus                :       0.000000                            0.000000 A7X a  
Index tolerance on surface 2 TWpw/osW  
TIND   2            -0.00100000     0.55639086     0.01235852     0.00100000     0.53126361    -0.01276872 n?@
zp<  
Change in Focus                :       0.000000                           -0.000000 'Bue*  
d%8n  
Worst offenders: -O *_+8f  
Type                      Value      Criterion        Change uB I/3aQ  
TSTY   2            -0.20000000     0.35349910    -0.19053324 7~XC_Yc1  
TSTY   2             0.20000000     0.35349910    -0.19053324 2o?j{K  
TSTX   2            -0.20000000     0.35349910    -0.19053324 |eu8;~A  
TSTX   2             0.20000000     0.35349910    -0.19053324 fY00  
TSTY   1            -0.20000000     0.42678383    -0.11724851 +\T8`iCFB  
TSTY   1             0.20000000     0.42678383    -0.11724851 |_TiF;^  
TSTX   1            -0.20000000     0.42678383    -0.11724851 {cs>Sy 4  
TSTX   1             0.20000000     0.42678383    -0.11724851 5b}w  
TSTY   3            -0.20000000     0.42861670    -0.11541563 d~u=,@FK  
TSTY   3             0.20000000     0.42861670    -0.11541563 Nnh\FaI  
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Estimated Performance Changes based upon Root-Sum-Square method: B r#{  
Nominal MTF                 :     0.54403234 dun`/QKV  
Estimated change            :    -0.36299231 wG,"X'1  
Estimated MTF               :     0.18104003 '
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2#.s{
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Compensator Statistics: QOXo(S  
Change in back focus: KHAc!4lA  
Minimum            :        -0.000000 1cK'B<5">]  
Maximum            :         0.000000 +|LM"  
Mean               :        -0.000000 '.bf88D  
Standard Deviation :         0.000000 s:tX3X  
wo0j/4o  
Monte Carlo Analysis: EQ$k^Y8
"  
Number of trials: 20 Ok_}d&A  
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Initial Statistics: Normal Distribution +F)-n2Bi  
|HmY`w6*z  
  Trial       Criterion        Change VgNB^w  
      1     0.42804416    -0.11598818 Ar!0GwE+  
Change in Focus                :      -0.400171 'SFAJ  
      2     0.54384387    -0.00018847 YCDH0M  
Change in Focus                :       1.018470 i3w
~&y-  
      3     0.44510003    -0.09893230 9
`*ST(0/  
Change in Focus                :      -0.601922 v.(dOIrX  
      4     0.18154684    -0.36248550 %aNm j)L  
Change in Focus                :       0.920681 eNd&
47lJ  
      5     0.28665820    -0.25737414 *tUOTA 3L  
Change in Focus                :       1.253875 f'=u`*(b7  
      6     0.21263372    -0.33139862 %LrOGr  
Change in Focus                :      -0.903878 O t)}:oG  
      7     0.40051424    -0.14351809 Y%?S:&GH  
Change in Focus                :      -1.354815 qofAA!3z  
      8     0.48754161    -0.05649072 }b\hRy~=r  
Change in Focus                :       0.215922 w0~%,S  
      9     0.40357468    -0.14045766 VM%g QOo<  
Change in Focus                :       0.281783 lKsn6c,]  
     10     0.26315315    -0.28087919 zGtJ@HbB  
Change in Focus                :      -1.048393 i.t%a{gL  
     11     0.26120585    -0.28282649 WutPy_L<  
Change in Focus                :       1.017611 hS,&Nj+  
     12     0.24033815    -0.30369419 X)KCk2Ax  
Change in Focus                :      -0.109292 WML--<dU  
     13     0.37164046    -0.17239188 :K6JrS  
Change in Focus                :      -0.692430 @5^&&4>N  
     14     0.48597489    -0.05805744 xh2r?K@k>  
Change in Focus                :      -0.662040 9vV==A#  
     15     0.21462327    -0.32940907 e#*3X4<\K  
Change in Focus                :       1.611296 bG]0|  
     16     0.43378226    -0.11025008 Rge>20uTl$  
Change in Focus                :      -0.640081 iA
z0 A  
     17     0.39321881    -0.15081353 ["D!IqI:  
Change in Focus                :       0.914906 N6._Jb  
     18     0.20692530    -0.33710703 Z[nHo'  
Change in Focus                :       0.801607  WwB_L.{  
     19     0.51374068    -0.03029165 yUnV%@.  
Change in Focus                :       0.947293 J9[7AiEd(/  
     20     0.38013374    -0.16389860 86=W}eV1r  
Change in Focus                :       0.667010 pT|
s#-}  
D|ceZ <9x  
Number of traceable Monte Carlo files generated: 20 h[>pC"s?K  
b&P)J|Fe  
Nominal     0.54403234 B@(d5i{h  
Best        0.54384387    Trial     2 ^s{Ff+]W  
Worst       0.18154684    Trial     4 V[(fE=cIN~  
Mean        0.35770970 c-k3<|H`  
Std Dev     0.11156454 y^C5_w(^jZ  
}.A]=Ew  
~LS</_N  
Compensator Statistics: 'V?FeWp  
Change in back focus: 0OM^,5%8  
Minimum            :        -1.354815 WK6,K92  
Maximum            :         1.611296 c]uieig0~  
Mean               :         0.161872 ZPH_s^  
Standard Deviation :         0.869664 ;O}%SCF7  
gO8d2?Oh  
90% >       0.20977951               W4
o8]&A  
80% >       0.22748071               ;<M}ZL@m  
50% >       0.38667627               uA#K59E+  
20% >       0.46553746               |<u+Xi ~  
10% >       0.50064115                oJ4HvrUO  
0''p29  
End of Run. Rt?CE jy  
~LuGfPO^  
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 Kzrd<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 j1;[6XG  
+ALrHFG  
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                 p/(Z2N"  
80% >       0.22748071                 HX2u{
2$  
50% >       0.38667627                 [e` |<  
20% >       0.46553746                 t}k:wzZ@  
10% >       0.50064115 %Lh%bqGz  
%/uLyCUZ  
最后这个数值是MTF值呢，还是MTF的公差？ ?+.mP]d_  
/p<9C?
 
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？？？   C_N|o|dX  
=p4n@C  
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  : R=.?el  
90% >       0.20977951                 Y\WQ0'y  
80% >       0.22748071                 4AEw[(t  
50% >       0.38667627                 s``a{ HZ  
20% >       0.46553746                 >N al\  
10% >       0.50064115 <eEIR  
....... KH
)-=IJ8  

FiMM-c|
 
zwC ,,U  
这些数值都是MTF值

Criterion           : Geometric MTF average S&T at 30.0000 cycles per mm   9nVb$pfe#  
Mode                : Sensitivities A-1KTD  
Sampling            : 2 "7EK{6&jQ  
Nominal Criterion   : 0.54403234 Pqx?0f)  
Test Wavelength     : 0.6328 w tGS"L  
tJu:N'=Dy  
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？ l'4<^q  
Jc?zX8>Ae:  
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