[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 h6Q-+_5  
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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 u*C"d1v=  
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图片:2.jpg

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然后运行分析的结果如下： QnPgp(d<  
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Analysis of Tolerances PdNxuy  
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File : E:\光学设计资料\zemax练习\f500.ZMX eHy.<VX  
Title: M!E#T-)  
Date : TUE JUN 21 2011 /naGn@m5u  
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Units are Millimeters. 2xJT!lN  
All changes are computed using linear differences. Hz] p]  
|Sf` Cs  
Paraxial Focus compensation only. A[
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va_TC!{;  
WARNING: Solves should be removed prior to tolerancing. I-`qo7dQ_S  
-a(\(^NW  
Mnemonics: Y =BXV7\  
TFRN: Tolerance on curvature in fringes. oL69w1  
TTHI: Tolerance on thickness. :.,3Zw{l  
TSDX: Tolerance on surface decentering in x. ;n-IpR#|  
TSDY: Tolerance on surface decentering in y. FII>6c  
TSTX: Tolerance on surface tilt in x (degrees). /|. |y S9  
TSTY: Tolerance on surface tilt in y (degrees). #:?MtVC  
TIRR: Tolerance on irregularity (fringes). )xMP  
TIND: Tolerance on Nd index of refraction. ~jqh&u$(  
TEDX: Tolerance on element decentering in x. ^-'t`mRl]d  
TEDY: Tolerance on element decentering in y. .O+qtk!  
TETX: Tolerance on element tilt in x (degrees). +v}R-gNR  
TETY: Tolerance on element tilt in y (degrees). nPj/C7j  
:i24@V~){  
WARNING: RAY AIMING IS OFF. Very loose tolerances may not be computed accurately. [@_zsz,`L  
Hx]{'?  
WARNING: Boundary constraints on compensators will be ignored. c*"TmDY  
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Criterion           : Geometric MTF average S&T at 30.0000 cycles per mm -}?
ud3f<  
Mode                : Sensitivities bCmhlSNi  
Sampling            : 2 D(]])4  
Nominal Criterion   : 0.54403234 g}hR q%  
Test Wavelength     : 0.6328 8'kA",P  
3C8W]yw/s  
Jc#()4  
Fields: XY Symmetric Angle in degrees XU}sbbwu  
#      X-Field      Y-Field       Weight    VDX    VDY    VCX    VCY $*Q_3]AY]  
1   0.000E+000   0.000E+000   1.000E+000  0.000  0.000  0.000  0.000 e!5nz_J1}  
1Jx|0YmO  
Sensitivity Analysis: 0*.> >rI  
Yjr6/&ML  
                 |----------------- Minimum ----------------| |----------------- Maximum ----------------| \q8D7/q  
Type                      Value      Criterion        Change          Value      Criterion        Change -;?5<>zZ  
Fringe tolerance on surface 1 t7%!~s=,M  
TFRN   1            -1.00000000     0.54257256    -0.00145977     1.00000000     0.54548607     0.00145374 TZ7{cekQ  
Change in Focus                :      -0.000000                            0.000000 
Yz?1]<X  
Fringe tolerance on surface 2 ~!,Q<?  
TFRN   2            -1.00000000     0.54177471    -0.00225762     1.00000000     0.54627463     0.00224230 #6tb{ws3  
Change in Focus                :       0.000000                            0.000000 ~la=rh3  
Fringe tolerance on surface 3 f(O`t}Ed  
TFRN   3            -1.00000000     0.54779866     0.00376632     1.00000000     0.54022572    -0.00380662 Rp2~d  
Change in Focus                :      -0.000000                            0.000000 .+H8c.  
Thickness tolerance on surface 1 tzxp0&:Z].  
TTHI   1   3        -0.20000000     0.54321462    -0.00081772     0.20000000     0.54484759     0.00081525 RPvOup  
Change in Focus                :       0.000000                            0.000000 *yv@-lP5s  
Thickness tolerance on surface 2 d`|W6Do  
TTHI   2   3        -0.20000000     0.54478712     0.00075478     0.20000000     0.54327558    -0.00075675 "=unDpq]  
Change in Focus                :       0.000000                           -0.000000 s68EzFS  
Decenter X tolerance on surfaces 1 through 3 $FgpFxz;  
TEDX   1   3        -0.20000000     0.54401464   -1.7700E-005     0.20000000     0.54401464   -1.7700E-005 U=C8gVb{Hq  
Change in Focus                :       0.000000                            0.000000 V;Zp3Qo!  
Decenter Y tolerance on surfaces 1 through 3 @5%cP  
TEDY   1   3        -0.20000000     0.54401464   -1.7700E-005     0.20000000     0.54401464   -1.7700E-005 j${:Y$V
mE  
Change in Focus                :       0.000000                            0.000000 6t5)rlT  
Tilt X tolerance on surfaces 1 through 3 (degrees) >a]4}  
TETX   1   3        -0.20000000     0.54897548     0.00494314     0.20000000     0.54897548     0.00494314 {Y9m;b,X  
Change in Focus                :       0.000000                            0.000000 gev7eGH<  
Tilt Y tolerance on surfaces 1 through 3 (degrees) b&g9A{t  
TETY   1   3        -0.20000000     0.54897548     0.00494314     0.20000000     0.54897548     0.00494314 N b(f  
Change in Focus                :       0.000000                            0.000000 E5lC'@Dcz  
Decenter X tolerance on surface 1 [|2uu."$  
TSDX   1            -0.20000000     0.53999563    -0.00403671     0.20000000     0.53999563    -0.00403671 eB:obz  
Change in Focus                :       0.000000                            0.000000 -#b-@sD  
Decenter Y tolerance on surface 1 Y.?|[x0Wh  
TSDY   1            -0.20000000     0.53999563    -0.00403671     0.20000000     0.53999563    -0.00403671 yKO84cSl  
Change in Focus                :       0.000000                            0.000000 ,>%AEN6N2  
Tilt X tolerance on surface (degrees) 1 ]t|KFk!)  
TSTX   1            -0.20000000     0.42678383    -0.11724851     0.20000000     0.42678383    -0.11724851 s &v<5W2P  
Change in Focus                :       0.000000                            0.000000 xXK7i\ny  
Tilt Y tolerance on surface (degrees) 1 v&U'%1|  
TSTY   1            -0.20000000     0.42678383    -0.11724851     0.20000000     0.42678383    -0.11724851 _[V.%k  
Change in Focus                :       0.000000                            0.000000 ,z)7rU`  
Decenter X tolerance on surface 2 _tQ=ASe0  
TSDX   2            -0.20000000     0.51705427    -0.02697807     0.20000000     0.51705427    -0.02697807 Nh41o0  
Change in Focus                :       0.000000                            0.000000 "w`f>]YLA  
Decenter Y tolerance on surface 2 0.nS306  
TSDY   2            -0.20000000     0.51705427    -0.02697807     0.20000000     0.51705427    -0.02697807 &_&])V)<\S  
Change in Focus                :       0.000000                            0.000000 y^zVb\"4  
Tilt X tolerance on surface (degrees) 2 p;) ;Vm+8  
TSTX   2            -0.20000000     0.35349910    -0.19053324     0.20000000     0.35349910    -0.19053324 J1"u,HF*(  
Change in Focus                :       0.000000                            0.000000 ~?aq=T  
Tilt Y tolerance on surface (degrees) 2 1+o>#8D  
TSTY   2            -0.20000000     0.35349910    -0.19053324     0.20000000     0.35349910    -0.19053324 Y[;Pl$  
Change in Focus                :       0.000000                            0.000000 qJW>Y}  
Decenter X tolerance on surface 3 C["^%0lj  
TSDX   3            -0.20000000     0.53419039    -0.00984195     0.20000000     0.53419039    -0.00984195 Z>a_vC  
Change in Focus                :       0.000000                            0.000000 V0L^pDLOV  
Decenter Y tolerance on surface 3 1,W%t\D  
TSDY   3            -0.20000000     0.53419039    -0.00984195     0.20000000     0.53419039    -0.00984195 9U58#  
Change in Focus                :       0.000000                            0.000000 H(]lqvO  
Tilt X tolerance on surface (degrees) 3 neQ2+W%oj  
TSTX   3            -0.20000000     0.42861670    -0.11541563     0.20000000     0.42861670    -0.11541563 2?ZHWS>U  
Change in Focus                :       0.000000                            0.000000 7F3Hkvd[k  
Tilt Y tolerance on surface (degrees) 3 ~sAINV>A  
TSTY   3            -0.20000000     0.42861670    -0.11541563     0.20000000     0.42861670    -0.11541563 nP?(9;3*  
Change in Focus                :       0.000000                            0.000000 sEdWB
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Irregularity of surface 1 in fringes m0F-[k3)  
TIRR   1            -0.20000000     0.50973587    -0.03429647     0.20000000     0.57333868     0.02930634 W #qM$  
Change in Focus                :       0.000000                            0.000000 X8bo?0  
Irregularity of surface 2 in fringes YFLWkdqAY  
TIRR   2            -0.20000000     0.53400904    -0.01002330     0.20000000     0.55360281     0.00957047 U%_a@&<  
Change in Focus                :       0.000000                            0.000000
+F 6KGK[  
Irregularity of surface 3 in fringes e\.|d<N?  
TIRR   3            -0.20000000     0.58078982     0.03675748     0.20000000     0.49904394    -0.04498840 kOR%<#:J  
Change in Focus                :       0.000000                            0.000000 ms ;RJT2O'  
Index tolerance on surface 1 Q%QpG)E  
TIND   1            -0.00100000     0.52606778    -0.01796456     0.00100000     0.56121811     0.01718578 )TyL3Z\>(  
Change in Focus                :       0.000000                            0.000000 nH% /  
Index tolerance on surface 2 guSgTUJ}  
TIND   2            -0.00100000     0.55639086     0.01235852     0.00100000     0.53126361    -0.01276872 Ff& VBm  
Change in Focus                :       0.000000                           -0.000000 +zs;>'Sf  
b]RnCu"  
Worst offenders: 6!g3Juh  
Type                      Value      Criterion        Change ET_}x7  
TSTY   2            -0.20000000     0.35349910    -0.19053324 vD1jxk'fd  
TSTY   2             0.20000000     0.35349910    -0.19053324 C(iA G  
TSTX   2            -0.20000000     0.35349910    -0.19053324 :":W(O  
TSTX   2             0.20000000     0.35349910    -0.19053324 vn0XXuquzC  
TSTY   1            -0.20000000     0.42678383    -0.11724851 3=dGz^Zdv:  
TSTY   1             0.20000000     0.42678383    -0.11724851 %)l2dK&9"j  
TSTX   1            -0.20000000     0.42678383    -0.11724851 :n'QNGj  
TSTX   1             0.20000000     0.42678383    -0.11724851 Cj5M  
TSTY   3            -0.20000000     0.42861670    -0.11541563 sNX$ =<E  
TSTY   3             0.20000000     0.42861670    -0.11541563 #JuO  
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Estimated Performance Changes based upon Root-Sum-Square method: [ Q=)
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Nominal MTF                 :     0.54403234 TmX~vZ  
Estimated change            :    -0.36299231 q.<q(r  
Estimated MTF               :     0.18104003 wqE ]o= k  
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Compensator Statistics: fb`VYD9[^  
Change in back focus: kHz3_B9[  
Minimum            :        -0.000000 !h&hPY1  
Maximum            :         0.000000 tk}qvW.Ii  
Mean               :        -0.000000 51;(vf  
Standard Deviation :         0.000000 5/P?@`/eT  
z^}T= $&  
Monte Carlo Analysis: |nD2k,S<?  
Number of trials: 20 ,=6Eju#P  
Fl*@@jQ8cV  
Initial Statistics: Normal Distribution R"O9~s6N  
m(g$T  
  Trial       Criterion        Change e|MyA?`  
      1     0.42804416    -0.11598818 HSK^vd?_l  
Change in Focus                :      -0.400171 ~ xf9 ml  
      2     0.54384387    -0.00018847 CF42KNq  
Change in Focus                :       1.018470 XJ@ /r,2  
      3     0.44510003    -0.09893230 b55|JWfC`  
Change in Focus                :      -0.601922 7BI0g@$Nn]  
      4     0.18154684    -0.36248550 #M`ijN!Y  
Change in Focus                :       0.920681 }clFaT>m?  
      5     0.28665820    -0.25737414 7)_0jp~2  
Change in Focus                :       1.253875 Nb]qY>K  
      6     0.21263372    -0.33139862 XkdNWR0  
Change in Focus                :      -0.903878 te:"
1:e  
      7     0.40051424    -0.14351809 Tm3$|+}$f  
Change in Focus                :      -1.354815 UdL`.D,  
      8     0.48754161    -0.05649072 '{:(4>&  
Change in Focus                :       0.215922 )-jvp8%BK  
      9     0.40357468    -0.14045766 >Q5 SJZ/  
Change in Focus                :       0.281783 ^@[[,1"
K  
     10     0.26315315    -0.28087919 })!n1kt  
Change in Focus                :      -1.048393 N(1jm
F  
     11     0.26120585    -0.28282649 mDV 2vg  
Change in Focus                :       1.017611 bjQfZ
T(  
     12     0.24033815    -0.30369419 &S|laqH  
Change in Focus                :      -0.109292 0|GxOzNd  
     13     0.37164046    -0.17239188 2_F`ILCML  
Change in Focus                :      -0.692430 9m6w.:S  
     14     0.48597489    -0.05805744 DK)qBxc8  
Change in Focus                :      -0.662040 orHVL2 KK  
     15     0.21462327    -0.32940907 6#{= E@  
Change in Focus                :       1.611296 7B&nV92S  
     16     0.43378226    -0.11025008 1km=9[;w'  
Change in Focus                :      -0.640081 &F.lo9JJ  
     17     0.39321881    -0.15081353 {L4^IKI  
Change in Focus                :       0.914906 v<2+y
Z M  
     18     0.20692530    -0.33710703 WMUw5h  
Change in Focus                :       0.801607  dc5B#  
     19     0.51374068    -0.03029165 ORHC bw9  
Change in Focus                :       0.947293 C)ChF`Ru':  
     20     0.38013374    -0.16389860 #K)HuT  
Change in Focus                :       0.667010 CWDo_g$  
{UPIdQ'g  
Number of traceable Monte Carlo files generated: 20 ,2kWj7H%7  
?2=c'%w7  
Nominal     0.54403234  =6A<>  
Best        0.54384387    Trial     2 ;\&7smE[  
Worst       0.18154684    Trial     4 BO[A1'>  
Mean        0.35770970 )
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Std Dev     0.11156454 S3oU7*OZ  
{'}Ofj  
&
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Compensator Statistics: <N`rcKE%~P  
Change in back focus: Bo~wD|E2  
Minimum            :        -1.354815 Jhut>8  
Maximum            :         1.611296 Dl"y|  
Mean               :         0.161872 ?ke C  
Standard Deviation :         0.869664 yNN2}\[.  
(8
EZ,V:  
90% >       0.20977951               z1Ju;k(8  
80% >       0.22748071               % vP{C  
50% >       0.38667627               Icr'l$PE  
20% >       0.46553746               f,uxoAS  
10% >       0.50064115                @\q~OyV  
S%T1na^x  
End of Run. hB^"GYZ  
W&yw5rt**  
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 @?%"nK  

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 hZJ Nh,,w  
v~xG*e  
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                 8q0 .yhb  
80% >       0.22748071                 bEE:6)]G  
50% >       0.38667627                 #"OKO6]  
20% >       0.46553746                 p;H1,E:Re#  
10% >       0.50064115 -WYJ1B0v  
+GGj*sD  
最后这个数值是MTF值呢，还是MTF的公差？ ht-6_]+ME  
-yAIrvO1q  
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？？？   Ue\&  
7oWv'  
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  : ,Bta)  
90% >       0.20977951                 X=JSqO6V9  
80% >       0.22748071                 +F/'+  
50% >       0.38667627                 ~/NA?E
-c  
20% >       0.46553746                 $a-~ozr`C  
10% >       0.50064115 
b2),J  
....... $v^F>*I1
 

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Rub""Ga  
这些数值都是MTF值

Criterion           : Geometric MTF average S&T at 30.0000 cycles per mm   U{;i864:}  
Mode                : Sensitivities rdC(+2+Ay  
Sampling            : 2 9 ROKueP  
Nominal Criterion   : 0.54403234 4Q]+tXes  
Test Wavelength     : 0.6328 3*;{C|]S  
)kkO:j  
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？ ~gV
|_G  
;[6u79;I  
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