[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 o%v,6yv  
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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 zfUkHL6  
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图片:2.jpg

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然后运行分析的结果如下： bt?)ryu  
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Analysis of Tolerances f
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6 ZVD<C:\  
File : E:\光学设计资料\zemax练习\f500.ZMX Xd9<`gu  
Title: V;]U]   
Date : TUE JUN 21 2011 zuBfkW95+  
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Units are Millimeters. .n)0@X!  
All changes are computed using linear differences. A>}]=Ii/  
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Paraxial Focus compensation only. IV$2`)[A&X  
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WARNING: Solves should be removed prior to tolerancing. yykyvy  
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Mnemonics: n/GJ&qLi:g  
TFRN: Tolerance on curvature in fringes. NKw}VW'|  
TTHI: Tolerance on thickness. w7h=vy n?  
TSDX: Tolerance on surface decentering in x. 7=]Y7"XCf  
TSDY: Tolerance on surface decentering in y. wGA%h.[M|  
TSTX: Tolerance on surface tilt in x (degrees). R)qK{wq(1E  
TSTY: Tolerance on surface tilt in y (degrees). R$VeD1n@  
TIRR: Tolerance on irregularity (fringes). & A@!g  
TIND: Tolerance on Nd index of refraction. %b`B.A  
TEDX: Tolerance on element decentering in x. j_~lc,+m  
TEDY: Tolerance on element decentering in y. hdee]qLS  
TETX: Tolerance on element tilt in x (degrees). n!y}p q6  
TETY: Tolerance on element tilt in y (degrees). DR#[\RzNI  
7$I *ju_  
WARNING: RAY AIMING IS OFF. Very loose tolerances may not be computed accurately. W[j7Vi8v  
'P~6_BW  
WARNING: Boundary constraints on compensators will be ignored. e\>g@xE%  
<2RxyoDL6  
Criterion           : Geometric MTF average S&T at 30.0000 cycles per mm Voc&T+A m  
Mode                : Sensitivities _fANl}Mf:  
Sampling            : 2 ;:pd/\<  
Nominal Criterion   : 0.54403234 We*c_;@<  
Test Wavelength     : 0.6328 dCM*4B<  
q9"~sCH  
$~*d.  
Fields: XY Symmetric Angle in degrees &:)e  
#      X-Field      Y-Field       Weight    VDX    VDY    VCX    VCY VR0#"  
1   0.000E+000   0.000E+000   1.000E+000  0.000  0.000  0.000  0.000 j\8'P9~%  
tc<t%]c  
Sensitivity Analysis: uu582%tiG  
YJ^TO\4WM  
                 |----------------- Minimum ----------------| |----------------- Maximum ----------------| a'ODm6#  
Type                      Value      Criterion        Change          Value      Criterion        Change 6 _\j_$  
Fringe tolerance on surface 1 ~j2=hkS  
TFRN   1            -1.00000000     0.54257256    -0.00145977     1.00000000     0.54548607     0.00145374 ss>?fyA  
Change in Focus                :      -0.000000                            0.000000 j>OB<4?.+  
Fringe tolerance on surface 2  %;9+`U  
TFRN   2            -1.00000000     0.54177471    -0.00225762     1.00000000     0.54627463     0.00224230 T3 k#6N.  
Change in Focus                :       0.000000                            0.000000 ^@..\X9  
Fringe tolerance on surface 3 D?"TcA  
TFRN   3            -1.00000000     0.54779866     0.00376632     1.00000000     0.54022572    -0.00380662 F /:2+  
Change in Focus                :      -0.000000                            0.000000 wh;E\^',n  
Thickness tolerance on surface 1 >K;'dB/m;1  
TTHI   1   3        -0.20000000     0.54321462    -0.00081772     0.20000000     0.54484759     0.00081525 \4`2k  
Change in Focus                :       0.000000                            0.000000 p,w6D,h  
Thickness tolerance on surface 2 =F}e>D  
TTHI   2   3        -0.20000000     0.54478712     0.00075478     0.20000000     0.54327558    -0.00075675 4';tMiz  
Change in Focus                :       0.000000                           -0.000000 \W6|un  
Decenter X tolerance on surfaces 1 through 3 ZVek`C
c2  
TEDX   1   3        -0.20000000     0.54401464   -1.7700E-005     0.20000000     0.54401464   -1.7700E-005 XP-4=0zd  
Change in Focus                :       0.000000                            0.000000 wfrWpz=FO  
Decenter Y tolerance on surfaces 1 through 3 +iPS=
?S  
TEDY   1   3        -0.20000000     0.54401464   -1.7700E-005     0.20000000     0.54401464   -1.7700E-005 %lU$;cY  
Change in Focus                :       0.000000                            0.000000 &j7l
#Urq  
Tilt X tolerance on surfaces 1 through 3 (degrees) ~L'}!' &.  
TETX   1   3        -0.20000000     0.54897548     0.00494314     0.20000000     0.54897548     0.00494314 XJ;JDch  
Change in Focus                :       0.000000                            0.000000 ico(4KSk  
Tilt Y tolerance on surfaces 1 through 3 (degrees) V-w[\u  
TETY   1   3        -0.20000000     0.54897548     0.00494314     0.20000000     0.54897548     0.00494314 2v<[XNX  
Change in Focus                :       0.000000                            0.000000 o^! Zt
9  
Decenter X tolerance on surface 1 ]X)EO49  
TSDX   1            -0.20000000     0.53999563    -0.00403671     0.20000000     0.53999563    -0.00403671 rXz,<^Hmj  
Change in Focus                :       0.000000                            0.000000 gU}?Yy  
Decenter Y tolerance on surface 1 xf@D<}~1  
TSDY   1            -0.20000000     0.53999563    -0.00403671     0.20000000     0.53999563    -0.00403671 z {J1pH_X  
Change in Focus                :       0.000000                            0.000000 "zO+!h'o  
Tilt X tolerance on surface (degrees) 1 r(yb%p+  
TSTX   1            -0.20000000     0.42678383    -0.11724851     0.20000000     0.42678383    -0.11724851 &7X0 ;<  
Change in Focus                :       0.000000                            0.000000 -~h2^Oez  
Tilt Y tolerance on surface (degrees) 1 Om0S^4y]x  
TSTY   1            -0.20000000     0.42678383    -0.11724851     0.20000000     0.42678383    -0.11724851 y*6r&989  
Change in Focus                :       0.000000                            0.000000 dR_hPBn/@  
Decenter X tolerance on surface 2 QE5 85s5  
TSDX   2            -0.20000000     0.51705427    -0.02697807     0.20000000     0.51705427    -0.02697807 g5to0  
Change in Focus                :       0.000000                            0.000000 pDlh^?cux  
Decenter Y tolerance on surface 2 d}',Bl+u{$  
TSDY   2            -0.20000000     0.51705427    -0.02697807     0.20000000     0.51705427    -0.02697807 ;
r[=q u\  
Change in Focus                :       0.000000                            0.000000 YAZ=-@]`\  
Tilt X tolerance on surface (degrees) 2 3Pp*ID  
TSTX   2            -0.20000000     0.35349910    -0.19053324     0.20000000     0.35349910    -0.19053324 $hO8 S=  
Change in Focus                :       0.000000                            0.000000 f|FQd3o)  
Tilt Y tolerance on surface (degrees) 2 !{SU G+.2  
TSTY   2            -0.20000000     0.35349910    -0.19053324     0.20000000     0.35349910    -0.19053324 Bd"7F{H  
Change in Focus                :       0.000000                            0.000000 N_r*Ig  
Decenter X tolerance on surface 3 N2tvP+Z6D  
TSDX   3            -0.20000000     0.53419039    -0.00984195     0.20000000     0.53419039    -0.00984195 );;
UNO21+  
Change in Focus                :       0.000000                            0.000000 7w{`f)~  
Decenter Y tolerance on surface 3 a(8]y.`Tv  
TSDY   3            -0.20000000     0.53419039    -0.00984195     0.20000000     0.53419039    -0.00984195 s:cS 9A8  
Change in Focus                :       0.000000                            0.000000 Q;5'I3w  
Tilt X tolerance on surface (degrees) 3 Y@u{73H  
TSTX   3            -0.20000000     0.42861670    -0.11541563     0.20000000     0.42861670    -0.11541563 2#1FI0,Pa*  
Change in Focus                :       0.000000                            0.000000 Hv0sl+  
Tilt Y tolerance on surface (degrees) 3 ^m8\fCA*  
TSTY   3            -0.20000000     0.42861670    -0.11541563     0.20000000     0.42861670    -0.11541563 '7'cKp  
Change in Focus                :       0.000000                            0.000000 k=bv!T_o  
Irregularity of surface 1 in fringes >e-XZ2>Sj  
TIRR   1            -0.20000000     0.50973587    -0.03429647     0.20000000     0.57333868     0.02930634 QbqLj>-AJ  
Change in Focus                :       0.000000                            0.000000 :eQxdi'  
Irregularity of surface 2 in fringes }+#ag:M  
TIRR   2            -0.20000000     0.53400904    -0.01002330     0.20000000     0.55360281     0.00957047 kC9A  
Change in Focus                :       0.000000                            0.000000 a$t [}D2  
Irregularity of surface 3 in fringes rmQGzQnun  
TIRR   3            -0.20000000     0.58078982     0.03675748     0.20000000     0.49904394    -0.04498840 P!YT{}  
Change in Focus                :       0.000000                            0.000000 o`j%$K4?5  
Index tolerance on surface 1 x'JfRz  
TIND   1            -0.00100000     0.52606778    -0.01796456     0.00100000     0.56121811     0.01718578 .FHOOw1r=  
Change in Focus                :       0.000000                            0.000000 :@b>,{*4zS  
Index tolerance on surface 2 9f,HjR
P  
TIND   2            -0.00100000     0.55639086     0.01235852     0.00100000     0.53126361    -0.01276872 F<-Pbtw  
Change in Focus                :       0.000000                           -0.000000 )_2!1  
s9`T%pg  
Worst offenders: ~?b(2gn  
Type                      Value      Criterion        Change D|-]"(2i  
TSTY   2            -0.20000000     0.35349910    -0.19053324 u{p\8v%7  
TSTY   2             0.20000000     0.35349910    -0.19053324 Cv$TNkP*  
TSTX   2            -0.20000000     0.35349910    -0.19053324 8@+YcN;->  
TSTX   2             0.20000000     0.35349910    -0.19053324 vW)GUAF[  
TSTY   1            -0.20000000     0.42678383    -0.11724851 p-KuCobz]  
TSTY   1             0.20000000     0.42678383    -0.11724851 QTn-n)AE  
TSTX   1            -0.20000000     0.42678383    -0.11724851 Dh +^;dQ6  
TSTX   1             0.20000000     0.42678383    -0.11724851 -U/&3  
TSTY   3            -0.20000000     0.42861670    -0.11541563 bR&hI9`%F  
TSTY   3             0.20000000     0.42861670    -0.11541563 [>_(q|A6+  
& bw1  
Estimated Performance Changes based upon Root-Sum-Square method: ax>c&%vo  
Nominal MTF                 :     0.54403234 6/#= dv  
Estimated change            :    -0.36299231 dEe/\i'r9  
Estimated MTF               :     0.18104003 eEc;w#  
\v-> '  
Compensator Statistics: >9u6@  
Change in back focus: o!\
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Minimum            :        -0.000000 E!Fy2h>[Z  
Maximum            :         0.000000 B|GJboQ  
Mean               :        -0.000000 ^~`8 - TE  
Standard Deviation :         0.000000 |g'sRTKJ  
nM0nQ{6  
Monte Carlo Analysis: [Z5x_.k"I  
Number of trials: 20 Z(}x7jzW  
M$~h(3
  
Initial Statistics: Normal Distribution U.^)|IHW  
WX\%FJ  
  Trial       Criterion        Change |
[{;*wtv  
      1     0.42804416    -0.11598818 ;D^)^~7dh  
Change in Focus                :      -0.400171 dl":?D4H  
      2     0.54384387    -0.00018847 40c#zCE  
Change in Focus                :       1.018470 /d{L]*v)]  
      3     0.44510003    -0.09893230 xwRnrWd^6  
Change in Focus                :      -0.601922 G8;S`-D1a,  
      4     0.18154684    -0.36248550 $&e(
V6A@  
Change in Focus                :       0.920681 }zobIfIF  
      5     0.28665820    -0.25737414 HRb_ZJz  
Change in Focus                :       1.253875 5r+0^UAO:J  
      6     0.21263372    -0.33139862 hr{%'DAS  
Change in Focus                :      -0.903878 Maa.>2v<  
      7     0.40051424    -0.14351809 ?xf;#J+{8  
Change in Focus                :      -1.354815 _
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      8     0.48754161    -0.05649072 Sm Ei _u]'  
Change in Focus                :       0.215922 h?ia4
t  
      9     0.40357468    -0.14045766 #/tdZ0  
Change in Focus                :       0.281783 :,ym)|YV  
     10     0.26315315    -0.28087919 yav)mO~QU6  
Change in Focus                :      -1.048393 =)zq%d?i;  
     11     0.26120585    -0.28282649 \YKh'|04  
Change in Focus                :       1.017611 tAC,'im:*  
     12     0.24033815    -0.30369419 DS$ _"'g%i  
Change in Focus                :      -0.109292 $>h#|?*?  
     13     0.37164046    -0.17239188 @B'Mu:|f  
Change in Focus                :      -0.692430 :>;psR  
     14     0.48597489    -0.05805744 I?Zs|A  
Change in Focus                :      -0.662040 Q./lX:  
     15     0.21462327    -0.32940907 fgp7 |;Y  
Change in Focus                :       1.611296 7O9s5  
     16     0.43378226    -0.11025008 N{`l?t0I  
Change in Focus                :      -0.640081 kCC9U_dj,  
     17     0.39321881    -0.15081353 V?O%kd  
Change in Focus                :       0.914906 @NHRuk+  
     18     0.20692530    -0.33710703 aEk*-v#{  
Change in Focus                :       0.801607 Z*TW;h0ZQ3  
     19     0.51374068    -0.03029165 H3c=B /+  
Change in Focus                :       0.947293 z1FbW&V  
     20     0.38013374    -0.16389860 dI 5sqM:  
Change in Focus                :       0.667010 bMUIe\/v[  
={b ]  
Number of traceable Monte Carlo files generated: 20 o5D"<-=>  
b"Mq7&cf  
Nominal     0.54403234 #PrV)en  
Best        0.54384387    Trial     2 "~(&5M\8`  
Worst       0.18154684    Trial     4 {4QOUqAu  
Mean        0.35770970 i]53A0l  
Std Dev     0.11156454 ^i8I 1@ =  
kdUGmR0d  
8@fDn(]w  
Compensator Statistics: R_qo]WvR;  
Change in back focus: BH-[q9pf  
Minimum            :        -1.354815 >#:/ GN?  
Maximum            :         1.611296 7XDV=PQ[  
Mean               :         0.161872 )*A,L%  
Standard Deviation :         0.869664 ).]m@g:ew  
1:Yt2]  
90% >       0.20977951               bg,}J/  
80% >       0.22748071               46zaxcY<!  
50% >       0.38667627               lz)"zV  
20% >       0.46553746               NVjJ/  
10% >       0.50064115                =_'cG:=)  
UTTC:=F+  
End of Run. [\b_+s)eN  

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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 ]hj1.V+  

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 z/YMl3$l~  
@1F'V'  
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                 }{8Fo4/  
80% >       0.22748071                 y5/6nvH_6  
50% >       0.38667627                 ^ L^F=qx  
20% >       0.46553746                 ,iVPcza  
10% >       0.50064115 6B''9V:s  
_~[?>cF%  
最后这个数值是MTF值呢，还是MTF的公差？ |:9Ir^  
14D7U/zer  
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？？？   ,<3uc  
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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  : 4'SaEsA~  
90% >       0.20977951                 [yw%ih)  
80% >       0.22748071                 6b?`:$Cw3)  
50% >       0.38667627                 XOrcygb2  
20% >       0.46553746                 XRa(sXA3  
10% >       0.50064115 D_d|=
i  
....... #{!O,`qD  

eZg$AOpU  
.H8mRvd?  
这些数值都是MTF值

Criterion           : Geometric MTF average S&T at 30.0000 cycles per mm   -vV'Lw(  
Mode                : Sensitivities Ikj=`,a2B  
Sampling            : 2 `<^*jB@P  
Nominal Criterion   : 0.54403234 Z,WubX<  
Test Wavelength     : 0.6328 QY@u}&m%o  
&<Mt=(qY1  
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？ j0FW8!!-g  
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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