[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 &>=#w"skb6  
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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 $c9=mjwH  
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图片:2.jpg

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然后运行分析的结果如下： wP`sXPSmIu  
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Analysis of Tolerances 5B|,S1b  
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File : E:\光学设计资料\zemax练习\f500.ZMX B(Y.`L? %E  
Title: h#O"Q+J9n  
Date : TUE JUN 21 2011 QK7e|M  
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Units are Millimeters. |8'B/ p=  
All changes are computed using linear differences. ~
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Paraxial Focus compensation only. f!!P  
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WARNING: Solves should be removed prior to tolerancing. J";=d4Sd  
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Mnemonics: m+7`\|`jQ  
TFRN: Tolerance on curvature in fringes. T^NJ4L4#  
TTHI: Tolerance on thickness. 9<Ag1l  
TSDX: Tolerance on surface decentering in x. TK %<a/  
TSDY: Tolerance on surface decentering in y. id4]|jb  
TSTX: Tolerance on surface tilt in x (degrees). F,.Q|.nN  
TSTY: Tolerance on surface tilt in y (degrees). Wxk;g  
TIRR: Tolerance on irregularity (fringes). X#7}c5^Y  
TIND: Tolerance on Nd index of refraction. 3FY_A(+  
TEDX: Tolerance on element decentering in x. Z fqQ{_  
TEDY: Tolerance on element decentering in y. |Cq8%  
TETX: Tolerance on element tilt in x (degrees). [yvt1:q  
TETY: Tolerance on element tilt in y (degrees). OaNc9c"  
?q6Z's[  
WARNING: RAY AIMING IS OFF. Very loose tolerances may not be computed accurately. Kt6C43]7  
jQs*(=ls  
WARNING: Boundary constraints on compensators will be ignored. A`Q >h{  
nHVPMi>  
Criterion           : Geometric MTF average S&T at 30.0000 cycles per mm V0S6M^\DK  
Mode                : Sensitivities 1^tSn#j  
Sampling            : 2 !c."   
Nominal Criterion   : 0.54403234 mCK],TOA:  
Test Wavelength     : 0.6328 0QMaM  
YPG,9iZ&f  
O&52o]k5l  
Fields: XY Symmetric Angle in degrees 6."PS4}:  
#      X-Field      Y-Field       Weight    VDX    VDY    VCX    VCY &p)@8HY  
1   0.000E+000   0.000E+000   1.000E+000  0.000  0.000  0.000  0.000 Eh {up  
W0U`Kt&~a  
Sensitivity Analysis: 9D%qXU  
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                 |----------------- Minimum ----------------| |----------------- Maximum ----------------| v10mDr  
Type                      Value      Criterion        Change          Value      Criterion        Change gINwvzW{  
Fringe tolerance on surface 1 A ^-Z)0:  
TFRN   1            -1.00000000     0.54257256    -0.00145977     1.00000000     0.54548607     0.00145374 5'62ulwMP=  
Change in Focus                :      -0.000000                            0.000000 oFb\TiLu  
Fringe tolerance on surface 2 3]!h{_:u  
TFRN   2            -1.00000000     0.54177471    -0.00225762     1.00000000     0.54627463     0.00224230 2*Va9HP!q  
Change in Focus                :       0.000000                            0.000000 =#
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Fringe tolerance on surface 3 prqT(1  
TFRN   3            -1.00000000     0.54779866     0.00376632     1.00000000     0.54022572    -0.00380662 89db5Dx  
Change in Focus                :      -0.000000                            0.000000 4p?+LdL  
Thickness tolerance on surface 1 -ywX5B  
TTHI   1   3        -0.20000000     0.54321462    -0.00081772     0.20000000     0.54484759     0.00081525 cB_pyX9Z  
Change in Focus                :       0.000000                            0.000000 (y 3~[  
Thickness tolerance on surface 2 ,YQ=Zk)w  
TTHI   2   3        -0.20000000     0.54478712     0.00075478     0.20000000     0.54327558    -0.00075675 9}.,2JE  
Change in Focus                :       0.000000                           -0.000000 \ hrBq^I  
Decenter X tolerance on surfaces 1 through 3 n}VbdxlN  
TEDX   1   3        -0.20000000     0.54401464   -1.7700E-005     0.20000000     0.54401464   -1.7700E-005 +<GrRYbC  
Change in Focus                :       0.000000                            0.000000 FoQ?U=er  
Decenter Y tolerance on surfaces 1 through 3 )CFk`57U  
TEDY   1   3        -0.20000000     0.54401464   -1.7700E-005     0.20000000     0.54401464   -1.7700E-005 3Hy%SN(  
Change in Focus                :       0.000000                            0.000000 ?ISI[hoc  
Tilt X tolerance on surfaces 1 through 3 (degrees) ?rAi=w&c  
TETX   1   3        -0.20000000     0.54897548     0.00494314     0.20000000     0.54897548     0.00494314 a^%8QJW  
Change in Focus                :       0.000000                            0.000000 @;g`+:=  
Tilt Y tolerance on surfaces 1 through 3 (degrees) D xe-XKNc.  
TETY   1   3        -0.20000000     0.54897548     0.00494314     0.20000000     0.54897548     0.00494314 'lxLnX  
Change in Focus                :       0.000000                            0.000000 ~Ry $>n*/  
Decenter X tolerance on surface 1 H U:1f)aa  
TSDX   1            -0.20000000     0.53999563    -0.00403671     0.20000000     0.53999563    -0.00403671 ! Zno[R  
Change in Focus                :       0.000000                            0.000000 f%vHx,
  
Decenter Y tolerance on surface 1 BvSdp6z9Iv  
TSDY   1            -0.20000000     0.53999563    -0.00403671     0.20000000     0.53999563    -0.00403671 l}dj{s  
Change in Focus                :       0.000000                            0.000000 *iPs4Es-  
Tilt X tolerance on surface (degrees) 1 7zOhyl?  
TSTX   1            -0.20000000     0.42678383    -0.11724851     0.20000000     0.42678383    -0.11724851 dko[  
Change in Focus                :       0.000000                            0.000000 UIO6|*ka  
Tilt Y tolerance on surface (degrees) 1 0T7M_G'5Q  
TSTY   1            -0.20000000     0.42678383    -0.11724851     0.20000000     0.42678383    -0.11724851 Gs^(YG
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Change in Focus                :       0.000000                            0.000000 O)Xd3w'  
Decenter X tolerance on surface 2 MP6 \r  
TSDX   2            -0.20000000     0.51705427    -0.02697807     0.20000000     0.51705427    -0.02697807 }~myf\$  
Change in Focus                :       0.000000                            0.000000 q2[+-B)m  
Decenter Y tolerance on surface 2 37%`P\O;s  
TSDY   2            -0.20000000     0.51705427    -0.02697807     0.20000000     0.51705427    -0.02697807 5wT',U"+  
Change in Focus                :       0.000000                            0.000000 ;Gjv9:hUn  
Tilt X tolerance on surface (degrees) 2 s'R~r  
TSTX   2            -0.20000000     0.35349910    -0.19053324     0.20000000     0.35349910    -0.19053324 qJ#L)  
Change in Focus                :       0.000000                            0.000000 0Ei\VVK>  
Tilt Y tolerance on surface (degrees) 2 #&;m<%  
TSTY   2            -0.20000000     0.35349910    -0.19053324     0.20000000     0.35349910    -0.19053324 C}x4#bNK  
Change in Focus                :       0.000000                            0.000000 ^nG1/}  
Decenter X tolerance on surface 3 Wpiv1GZ%c8  
TSDX   3            -0.20000000     0.53419039    -0.00984195     0.20000000     0.53419039    -0.00984195 c2tEz&=G  
Change in Focus                :       0.000000                            0.000000 .q AQPL  
Decenter Y tolerance on surface 3 Bq~AU#  
TSDY   3            -0.20000000     0.53419039    -0.00984195     0.20000000     0.53419039    -0.00984195 z44  
Change in Focus                :       0.000000                            0.000000 $xKg }cO  
Tilt X tolerance on surface (degrees) 3 v]LFZI5  
TSTX   3            -0.20000000     0.42861670    -0.11541563     0.20000000     0.42861670    -0.11541563 gubb .EY  
Change in Focus                :       0.000000                            0.000000 _Ym&UY.u#  
Tilt Y tolerance on surface (degrees) 3 jrDz7AfA  
TSTY   3            -0.20000000     0.42861670    -0.11541563     0.20000000     0.42861670    -0.11541563 D<+ bzC  
Change in Focus                :       0.000000                            0.000000 Hj}g1"RA  
Irregularity of surface 1 in fringes tXssejiE%  
TIRR   1            -0.20000000     0.50973587    -0.03429647     0.20000000     0.57333868     0.02930634 jEC'l]l  
Change in Focus                :       0.000000                            0.000000  9OrA9r  
Irregularity of surface 2 in fringes @t{{Q1  
TIRR   2            -0.20000000     0.53400904    -0.01002330     0.20000000     0.55360281     0.00957047 7H8GkuO  
Change in Focus                :       0.000000                            0.000000 H}u)%qY+~  
Irregularity of surface 3 in fringes ;`X`c  
TIRR   3            -0.20000000     0.58078982     0.03675748     0.20000000     0.49904394    -0.04498840 `D&#U'wB   
Change in Focus                :       0.000000                            0.000000 Ri^sQ<~(  
Index tolerance on surface 1 , V0iMq  
TIND   1            -0.00100000     0.52606778    -0.01796456     0.00100000     0.56121811     0.01718578 }'@tA")-)  
Change in Focus                :       0.000000                            0.000000 5Ws:Ei{R  
Index tolerance on surface 2 &4ug

3  
TIND   2            -0.00100000     0.55639086     0.01235852     0.00100000     0.53126361    -0.01276872 lW{I`r\]  
Change in Focus                :       0.000000                           -0.000000 f~n' Ki+'  
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Worst offenders: .#:@cP~v  
Type                      Value      Criterion        Change I1eb31<  
TSTY   2            -0.20000000     0.35349910    -0.19053324 bTA14&&q  
TSTY   2             0.20000000     0.35349910    -0.19053324 Z7K!
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TSTX   2            -0.20000000     0.35349910    -0.19053324 1Ud t9$~T  
TSTX   2             0.20000000     0.35349910    -0.19053324 f_z2#,g  
TSTY   1            -0.20000000     0.42678383    -0.11724851 ]ly)z[is"]  
TSTY   1             0.20000000     0.42678383    -0.11724851 s5_1}KKCs  
TSTX   1            -0.20000000     0.42678383    -0.11724851 *YiD B?Si  
TSTX   1             0.20000000     0.42678383    -0.11724851 J.CZR[XF#  
TSTY   3            -0.20000000     0.42861670    -0.11541563 >o=axZNa  
TSTY   3             0.20000000     0.42861670    -0.11541563 m%BMd  
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Estimated Performance Changes based upon Root-Sum-Square method: il`C,CD  
Nominal MTF                 :     0.54403234 @n~ND).  
Estimated change            :    -0.36299231 93zlfLS0  
Estimated MTF               :     0.18104003 +ik N) D  
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Compensator Statistics: uMq\]
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Change in back focus: B8BY3~}]  
Minimum            :        -0.000000 <+mO$0h"r  
Maximum            :         0.000000 _3FMQY(  
Mean               :        -0.000000 Z;dwn~Tw  
Standard Deviation :         0.000000 MRxo|A{  
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Monte Carlo Analysis: !Cv<>_N).  
Number of trials: 20 Nt,]00S\w  
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Initial Statistics: Normal Distribution xr1I8 5kM  
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  Trial       Criterion        Change v~W6y
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      1     0.42804416    -0.11598818 st1M.}  
Change in Focus                :      -0.400171 ":ws~
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      2     0.54384387    -0.00018847 :jN;l  
Change in Focus                :       1.018470 sVZ}nq{  
      3     0.44510003    -0.09893230 ./5MsHfbxt  
Change in Focus                :      -0.601922 JqH.QnKcv  
      4     0.18154684    -0.36248550 *< SU_dAh  
Change in Focus                :       0.920681 %Tm'aY"  
      5     0.28665820    -0.25737414 }~0{1&  
Change in Focus                :       1.253875 (vYf?+Kb  
      6     0.21263372    -0.33139862 "p_[A  
Change in Focus                :      -0.903878 v2dSC(hRZ  
      7     0.40051424    -0.14351809 :;gwdZ  
Change in Focus                :      -1.354815 ::Ve,-0  
      8     0.48754161    -0.05649072 b "AHw?5F  
Change in Focus                :       0.215922 s\K-(`j}  
      9     0.40357468    -0.14045766 u{y5'cJ{  
Change in Focus                :       0.281783 ='l6&3X  
     10     0.26315315    -0.28087919 T=)L5Vuq<  
Change in Focus                :      -1.048393 W0C$*oe!_i  
     11     0.26120585    -0.28282649 h?O%XnD  
Change in Focus                :       1.017611 4 9+}OIX  
     12     0.24033815    -0.30369419 ;-P:$zw9c  
Change in Focus                :      -0.109292 G#=b6DB  
     13     0.37164046    -0.17239188 :d/:Ga5v!  
Change in Focus                :      -0.692430 ^
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     14     0.48597489    -0.05805744 ,'@ISCK^  
Change in Focus                :      -0.662040 u>-uRz<)t  
     15     0.21462327    -0.32940907 ?\ i,JJO  
Change in Focus                :       1.611296 ;:K?7wfXn  
     16     0.43378226    -0.11025008 )-7(Hv
1  
Change in Focus                :      -0.640081 Ub-k<]yZ  
     17     0.39321881    -0.15081353 m$e@<~To  
Change in Focus                :       0.914906 TuT=  
     18     0.20692530    -0.33710703 Vt 5XC~jK  
Change in Focus                :       0.801607 m~\m"zJ4  
     19     0.51374068    -0.03029165 ]&%X(jWyn  
Change in Focus                :       0.947293 EC&19  
     20     0.38013374    -0.16389860 yyYbB]D  
Change in Focus                :       0.667010 [_z2z6  
tLGwF3e$A  
Number of traceable Monte Carlo files generated: 20 4iB)oR  
UHm+5%ZC  
Nominal     0.54403234 Y K62#;  
Best        0.54384387    Trial     2 UmHb-uk ;  
Worst       0.18154684    Trial     4 DL/*t.)"et  
Mean        0.35770970 B=qRZA!DQ?  
Std Dev     0.11156454 Op)R3qt{  
0DjBqh$  
{`SGB;ho  
Compensator Statistics: jYssz4)tp  
Change in back focus: AI`1N%Owi  
Minimum            :        -1.354815 oz7udY=]0  
Maximum            :         1.611296 nT6iS}h  
Mean               :         0.161872 "Kf~`0P  
Standard Deviation :         0.869664 CX(yrP6;  
0Nzv
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90% >       0.20977951               aIyY%QT  
80% >       0.22748071               Ib
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50% >       0.38667627               +]2~@=<@  
20% >       0.46553746               K0bmU(Xxp  
10% >       0.50064115                vVRCM  
9n2%7dLQ*  
End of Run. L ~'N6  
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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 I.0Usa"z  

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 Qpu2RfP  
;-wPXXR  
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                 K?I&,t_*R  
80% >       0.22748071                 -L3RzX  
50% >       0.38667627                 cC]1D*Bn  
20% >       0.46553746                 )SLs  [  
10% >       0.50064115 )o,0aGo>Of  
+5
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最后这个数值是MTF值呢，还是MTF的公差？ W.<<azi  
^!tI+F{n{  
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？？？   fL:Fn"Nv  

6S&YL  
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  : *VB*/^6A  
90% >       0.20977951                 ^(R gSMuT`  
80% >       0.22748071                 3$54*J  
50% >       0.38667627                 Tx_LH"8  
20% >       0.46553746                 RU=%yk-gM  
10% >       0.50064115 Pif1sL6'  
....... 5]E5V@C
 

f&'md  
^E^:=Q?'_  
这些数值都是MTF值

Criterion           : Geometric MTF average S&T at 30.0000 cycles per mm   @u^Ib33  
Mode                : Sensitivities b~}}{fm&f  
Sampling            : 2 CJ_B.  
Nominal Criterion   : 0.54403234 N@}U;x}  
Test Wavelength     : 0.6328 >qCT#TY  
SDkN  
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？ ^P[*yf  
HwHI$IB  
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