[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 ~ZL}j+L/  
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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 I`FH^=  
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图片:2.jpg

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然后运行分析的结果如下： bJGT^N@  
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Analysis of Tolerances 0M:.Jhp  
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File : E:\光学设计资料\zemax练习\f500.ZMX .D>%-  
Title: + PGfQN  
Date : TUE JUN 21 2011 >Rx^@yQ!+z  
Elm/T]6  
Units are Millimeters. g+)T\_#u  
All changes are computed using linear differences. py@5]n%  
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Paraxial Focus compensation only. Qt!l-/flh  
:?yv0Iu  
WARNING: Solves should be removed prior to tolerancing. Z7OWpujCvN  
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Mnemonics: 8n1Sy7K!;  
TFRN: Tolerance on curvature in fringes. H|Q)Tp Lk  
TTHI: Tolerance on thickness. e7 5*84  
TSDX: Tolerance on surface decentering in x. !QP~#a%  
TSDY: Tolerance on surface decentering in y. >fQ-(io  
TSTX: Tolerance on surface tilt in x (degrees). Nluy]h &  
TSTY: Tolerance on surface tilt in y (degrees). -1Tws|4gc  
TIRR: Tolerance on irregularity (fringes). (hdP(U77  
TIND: Tolerance on Nd index of refraction. @P[Tu; 4  
TEDX: Tolerance on element decentering in x. glPOW  
TEDY: Tolerance on element decentering in y. _s<eqCBV  
TETX: Tolerance on element tilt in x (degrees). [V}I34UN  
TETY: Tolerance on element tilt in y (degrees). Hza{"I*^  
(CO8t~J=  
WARNING: RAY AIMING IS OFF. Very loose tolerances may not be computed accurately. }U%
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lSl=6R  
WARNING: Boundary constraints on compensators will be ignored. n16,u$|  
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Criterion           : Geometric MTF average S&T at 30.0000 cycles per mm tAc[r)xFw  
Mode                : Sensitivities |.)dOk,o  
Sampling            : 2 vM|?;QM  
Nominal Criterion   : 0.54403234 =Tb~CT
=  
Test Wavelength     : 0.6328 @
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!:a pu!  
}-YD_Pm K-  
Fields: XY Symmetric Angle in degrees LW0't} z  
#      X-Field      Y-Field       Weight    VDX    VDY    VCX    VCY !x|OgvJ  
1   0.000E+000   0.000E+000   1.000E+000  0.000  0.000  0.000  0.000 ;R 'OdQ$o  

d;V  
Sensitivity Analysis: Yb6(KT  
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                 |----------------- Minimum ----------------| |----------------- Maximum ----------------| h#'(UZ  
Type                      Value      Criterion        Change          Value      Criterion        Change q_']i6  
Fringe tolerance on surface 1 fqFE GyeNr  
TFRN   1            -1.00000000     0.54257256    -0.00145977     1.00000000     0.54548607     0.00145374 }(O 7tC  
Change in Focus                :      -0.000000                            0.000000 :Y~fPke  
Fringe tolerance on surface 2 lLyMm8E%pZ  
TFRN   2            -1.00000000     0.54177471    -0.00225762     1.00000000     0.54627463     0.00224230 jQC6N#L  
Change in Focus                :       0.000000                            0.000000 Cddw\|'3  
Fringe tolerance on surface 3 k9'%8(7M:  
TFRN   3            -1.00000000     0.54779866     0.00376632     1.00000000     0.54022572    -0.00380662 ub0]nov  
Change in Focus                :      -0.000000                            0.000000 M[@).4h  
Thickness tolerance on surface 1 *5.s@L( VU  
TTHI   1   3        -0.20000000     0.54321462    -0.00081772     0.20000000     0.54484759     0.00081525 4Z1-RS  
Change in Focus                :       0.000000                            0.000000 N:\I]
M  
Thickness tolerance on surface 2 ! E#XmYhX=  
TTHI   2   3        -0.20000000     0.54478712     0.00075478     0.20000000     0.54327558    -0.00075675 aKkQXq*  
Change in Focus                :       0.000000                           -0.000000 e*Sv}4e=.  
Decenter X tolerance on surfaces 1 through 3 # ]&=]K1V  
TEDX   1   3        -0.20000000     0.54401464   -1.7700E-005     0.20000000     0.54401464   -1.7700E-005 P%g[!9 '  
Change in Focus                :       0.000000                            0.000000 fp|b@  
Decenter Y tolerance on surfaces 1 through 3 ^SVdaQ{7  
TEDY   1   3        -0.20000000     0.54401464   -1.7700E-005     0.20000000     0.54401464   -1.7700E-005 WDWb7  
Change in Focus                :       0.000000                            0.000000 ?_(0cVi  
Tilt X tolerance on surfaces 1 through 3 (degrees) 2BsMFMIw1  
TETX   1   3        -0.20000000     0.54897548     0.00494314     0.20000000     0.54897548     0.00494314 N9Y,%lQ|B8  
Change in Focus                :       0.000000                            0.000000 o5@ l!NQ  
Tilt Y tolerance on surfaces 1 through 3 (degrees) >A7),6  
TETY   1   3        -0.20000000     0.54897548     0.00494314     0.20000000     0.54897548     0.00494314 <dLdSEw  
Change in Focus                :       0.000000                            0.000000 [XhuJdr"u  
Decenter X tolerance on surface 1 6 80i?=z  
TSDX   1            -0.20000000     0.53999563    -0.00403671     0.20000000     0.53999563    -0.00403671  9 k)?-  
Change in Focus                :       0.000000                            0.000000 CJ%bBL'.  
Decenter Y tolerance on surface 1 71mdU6Kq  
TSDY   1            -0.20000000     0.53999563    -0.00403671     0.20000000     0.53999563    -0.00403671 cRDjpc]  
Change in Focus                :       0.000000                            0.000000 p&_Kb\}U  
Tilt X tolerance on surface (degrees) 1 F!tn|!~  
TSTX   1            -0.20000000     0.42678383    -0.11724851     0.20000000     0.42678383    -0.11724851 ,H'O`oV!1E  
Change in Focus                :       0.000000                            0.000000 (iIJ[{[H4)  
Tilt Y tolerance on surface (degrees) 1 wk<QYLEk  
TSTY   1            -0.20000000     0.42678383    -0.11724851     0.20000000     0.42678383    -0.11724851 GCkc[]2p  
Change in Focus                :       0.000000                            0.000000 oIAP dn  
Decenter X tolerance on surface 2 zQV$!%qR  
TSDX   2            -0.20000000     0.51705427    -0.02697807     0.20000000     0.51705427    -0.02697807 w*eO9k  
Change in Focus                :       0.000000                            0.000000 X0* y8"  
Decenter Y tolerance on surface 2 e(@YBQ/Z  
TSDY   2            -0.20000000     0.51705427    -0.02697807     0.20000000     0.51705427    -0.02697807 XuVbi=pN.2  
Change in Focus                :       0.000000                            0.000000 @=E@ *@g  
Tilt X tolerance on surface (degrees) 2 9e@Sx{?r  
TSTX   2            -0.20000000     0.35349910    -0.19053324     0.20000000     0.35349910    -0.19053324 h?p&9[e`  
Change in Focus                :       0.000000                            0.000000 &|LZ%W0Fb  
Tilt Y tolerance on surface (degrees) 2 G sm5L<rx  
TSTY   2            -0.20000000     0.35349910    -0.19053324     0.20000000     0.35349910    -0.19053324 W1w)SS  
Change in Focus                :       0.000000                            0.000000 Q>cLGdzO  
Decenter X tolerance on surface 3 sV@kQ:  
TSDX   3            -0.20000000     0.53419039    -0.00984195     0.20000000     0.53419039    -0.00984195 !E'jd72O  
Change in Focus                :       0.000000                            0.000000 !rlN|HB  
Decenter Y tolerance on surface 3 ;HlVU  
TSDY   3            -0.20000000     0.53419039    -0.00984195     0.20000000     0.53419039    -0.00984195 CD:@OI  
Change in Focus                :       0.000000                            0.000000 n"Ot'1yr  
Tilt X tolerance on surface (degrees) 3 P#Z$+&)b)s  
TSTX   3            -0.20000000     0.42861670    -0.11541563     0.20000000     0.42861670    -0.11541563 T+8F'9i`  
Change in Focus                :       0.000000                            0.000000 JM0'V0z  
Tilt Y tolerance on surface (degrees) 3 ZXsm9  
TSTY   3            -0.20000000     0.42861670    -0.11541563     0.20000000     0.42861670    -0.11541563 O~.A}  
Change in Focus                :       0.000000                            0.000000 EX7gTf#  
Irregularity of surface 1 in fringes D"oyl`q  
TIRR   1            -0.20000000     0.50973587    -0.03429647     0.20000000     0.57333868     0.02930634 fT!n*;h  
Change in Focus                :       0.000000                            0.000000 osB[KRT>("  
Irregularity of surface 2 in fringes  P 1X8  
TIRR   2            -0.20000000     0.53400904    -0.01002330     0.20000000     0.55360281     0.00957047 v[T5D:  
Change in Focus                :       0.000000                            0.000000 M;ac U~J  
Irregularity of surface 3 in fringes we9R4*j  
TIRR   3            -0.20000000     0.58078982     0.03675748     0.20000000     0.49904394    -0.04498840 '-p<E"#4Z  
Change in Focus                :       0.000000                            0.000000 L5Rj;qhi  
Index tolerance on surface 1 B9`nV.a  
TIND   1            -0.00100000     0.52606778    -0.01796456     0.00100000     0.56121811     0.01718578 V/j+Z1ZW  
Change in Focus                :       0.000000                            0.000000 ]xBQ7Xqf
|  
Index tolerance on surface 2 n a])bBn  
TIND   2            -0.00100000     0.55639086     0.01235852     0.00100000     0.53126361    -0.01276872 yHT8I  
Change in Focus                :       0.000000                           -0.000000 v4kk4}lE  
`PnB<rf:*1  
Worst offenders: ?*zRM?*  
Type                      Value      Criterion        Change ZY-W~p1:G  
TSTY   2            -0.20000000     0.35349910    -0.19053324 7_)'Re#  
TSTY   2             0.20000000     0.35349910    -0.19053324 hhLEU_U  
TSTX   2            -0.20000000     0.35349910    -0.19053324 O:"gJ4D  
TSTX   2             0.20000000     0.35349910    -0.19053324 eVL'Ao&Ho  
TSTY   1            -0.20000000     0.42678383    -0.11724851 a$.(Zl  
TSTY   1             0.20000000     0.42678383    -0.11724851 }@_F( B  
TSTX   1            -0.20000000     0.42678383    -0.11724851 WUkx v*  
TSTX   1             0.20000000     0.42678383    -0.11724851 .-T^S"`d|  
TSTY   3            -0.20000000     0.42861670    -0.11541563 yf(VwU, x  
TSTY   3             0.20000000     0.42861670    -0.11541563 |Tuk9d4]  
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Estimated Performance Changes based upon Root-Sum-Square method: (0g@Z`r  
Nominal MTF                 :     0.54403234 glbU\K> >  
Estimated change            :    -0.36299231 +FRXTku(  
Estimated MTF               :     0.18104003 PXz,[<ET?#  
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Compensator Statistics: pi[:"}m]/P  
Change in back focus: ]fg?)z-Z  
Minimum            :        -0.000000 RR>Q$K  
Maximum            :         0.000000 (dvCejc^p  
Mean               :        -0.000000 q$7WZ+Y\  
Standard Deviation :         0.000000 Xs$k6C3  
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Monte Carlo Analysis: l'n"iQ!G  
Number of trials: 20 a^t#kdT  
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Initial Statistics: Normal Distribution *6=2UJcJ  
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  Trial       Criterion        Change pwU l&hwte  
      1     0.42804416    -0.11598818 !%>p;H%0  
Change in Focus                :      -0.400171 O$ui:<]dS  
      2     0.54384387    -0.00018847 A q;]al  
Change in Focus                :       1.018470 gF,9Kv~  
      3     0.44510003    -0.09893230 m~mw1r  
Change in Focus                :      -0.601922 JJ[.K*dO  
      4     0.18154684    -0.36248550 FWcE\;%yVg  
Change in Focus                :       0.920681 6a51bj!f  
      5     0.28665820    -0.25737414 q'9u8b  
Change in Focus                :       1.253875 :t+XW`eQR:  
      6     0.21263372    -0.33139862 tP8>0\$)  
Change in Focus                :      -0.903878 i;>Yx#  
      7     0.40051424    -0.14351809 6Ty;m>j  
Change in Focus                :      -1.354815 :^]rjy/|+  
      8     0.48754161    -0.05649072 qKag'0e  
Change in Focus                :       0.215922 D&KRJQ/  
      9     0.40357468    -0.14045766 kBg,U8|S  
Change in Focus                :       0.281783 [Zc8tE2oN  
     10     0.26315315    -0.28087919 HfEU[p7)  
Change in Focus                :      -1.048393 77?/e^K\S  
     11     0.26120585    -0.28282649 S)
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Change in Focus                :       1.017611 PLlad\  
     12     0.24033815    -0.30369419 },zP,y:cH  
Change in Focus                :      -0.109292 |X@ZM  
     13     0.37164046    -0.17239188 2>3#/I9Y  
Change in Focus                :      -0.692430 y5gTd_-  
     14     0.48597489    -0.05805744 %>u(UmFO  
Change in Focus                :      -0.662040 5'>DvCp%M  
     15     0.21462327    -0.32940907 FY1 >{Bn  
Change in Focus                :       1.611296 b8Gu<Q1k  
     16     0.43378226    -0.11025008 r/o1a't;  
Change in Focus                :      -0.640081 Q'D%?Vg'  
     17     0.39321881    -0.15081353 LCKCg[D  
Change in Focus                :       0.914906 }n/6.%  
     18     0.20692530    -0.33710703 V
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Change in Focus                :       0.801607 ~5S[Sl  
     19     0.51374068    -0.03029165 /Ilve U`E  
Change in Focus                :       0.947293 b?S,%  
     20     0.38013374    -0.16389860 eW%Cef  
Change in Focus                :       0.667010 i
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jFS])",\i  
Number of traceable Monte Carlo files generated: 20 ,=!_7'm
 
TKJs'%Q7F6  
Nominal     0.54403234 CWF(OMA  
Best        0.54384387    Trial     2 .yK~FzLs  
Worst       0.18154684    Trial     4 fL-lx-~  
Mean        0.35770970 aTXmF1_n  
Std Dev     0.11156454 &d}1)?  
X+6`]]  
mmSC0F  
Compensator Statistics: t@=*k9  
Change in back focus: Xm#rkF[,  
Minimum            :        -1.354815 |7XPu  
Maximum            :         1.611296 \M$
e#^g  
Mean               :         0.161872 DAYR=s  
Standard Deviation :         0.869664 .tRp  
-;T!d  
90% >       0.20977951               rf@Cz%xDD  
80% >       0.22748071               F_C7S  
50% >       0.38667627               LTsX{z  
20% >       0.46553746               5D9n>K4|  
10% >       0.50064115                ldFK3+V  
OGA_3|[S  
End of Run. NJ%>|`FEi7  
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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 0<ze'FbV]  

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 (*6kYkUK  
hD)'bd  
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                 f)_k_<  
80% >       0.22748071                 UM(`Oh8  
50% >       0.38667627                 #q
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20% >       0.46553746                 k00&+C  
10% >       0.50064115 q2{Aq[  
S\poa:D`  
最后这个数值是MTF值呢，还是MTF的公差？ nSSj&q-O  
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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？？？   bxc!x>)  
j9sLR  
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  : Q^|aix~ K  
90% >       0.20977951                 lFc4| _c g  
80% >       0.22748071                 *OR(8;  
50% >       0.38667627                 oh%/\Xu  
20% >       0.46553746                 *rmwTD"  
10% >       0.50064115 W}.p,d  
....... G}0fk]%\:  

E
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t
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这些数值都是MTF值

Criterion           : Geometric MTF average S&T at 30.0000 cycles per mm   K$Yc!4M  
Mode                : Sensitivities &xjeZh4-  
Sampling            : 2 dD}!E  
Nominal Criterion   : 0.54403234 G8ksm2}  
Test Wavelength     : 0.6328 ,';+
A{aV  
;WpPdR2  
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？ $/uNV1]o  
_ Oe|ZQ  
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