[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 N6-2*ES  
!>"INmz  

图片:1.JPG

2- |
j  
n?7h
p%}  
然后添加了默认公差分析，基本没变 }lrfO_  
$u0+29T2O  

图片:2.jpg

tZ*f~
yW  
Xs#?~~"aC  
然后运行分析的结果如下： ).O\O)K  
)BMWC k  
Analysis of Tolerances $6]x,Ct  
Kuzy&NI^w  
File : E:\光学设计资料\zemax练习\f500.ZMX %\s#e  
Title: SOi(5]  
Date : TUE JUN 21 2011 &<[]X@ bY  
e[|p0 ,Q  
Units are Millimeters. z!uB&2C{k  
All changes are computed using linear differences. R`<{W(J;r  
AS/\IHZ\  
Paraxial Focus compensation only. LRLhS<9  
{f6A[ZO;J  
WARNING: Solves should be removed prior to tolerancing. n"Z,-./m  
"KQ\F0/  
Mnemonics: [W7\c;Do  
TFRN: Tolerance on curvature in fringes. O#89M%  
TTHI: Tolerance on thickness. _dRn0<#1(k  
TSDX: Tolerance on surface decentering in x. LI5cUCl  
TSDY: Tolerance on surface decentering in y. 1 _:1/~R1  
TSTX: Tolerance on surface tilt in x (degrees). QKuc21  
TSTY: Tolerance on surface tilt in y (degrees). O(WMTa'%  
TIRR: Tolerance on irregularity (fringes). /:c,v-  
TIND: Tolerance on Nd index of refraction. 1.cUolnr  
TEDX: Tolerance on element decentering in x. tMs|UC  
TEDY: Tolerance on element decentering in y. SieV%T0t1  
TETX: Tolerance on element tilt in x (degrees). w7]p9B  
TETY: Tolerance on element tilt in y (degrees). k)4lX|}Vm  
4UX]S\X  
WARNING: RAY AIMING IS OFF. Very loose tolerances may not be computed accurately. pZ|nn  
2l}FgD  
WARNING: Boundary constraints on compensators will be ignored.
tg%WVy2  
GE|^ryh  
Criterion           : Geometric MTF average S&T at 30.0000 cycles per mm Z+pvdu  
Mode                : Sensitivities  ~d<`L[  
Sampling            : 2 -u
Y:2  
Nominal Criterion   : 0.54403234 QIxJFr;>  
Test Wavelength     : 0.6328 ?@uK
s4  
'| Q*~Lh  
`^4>^  
Fields: XY Symmetric Angle in degrees C&#KdvN/r  
#      X-Field      Y-Field       Weight    VDX    VDY    VCX    VCY sMe~C>RD  
1   0.000E+000   0.000E+000   1.000E+000  0.000  0.000  0.000  0.000 ;@;
ie8H  
YH'.Yj2  
Sensitivity Analysis: 1)kl  
0kr& c;~  
                 |----------------- Minimum ----------------| |----------------- Maximum ----------------| Ph!NYi,  
Type                      Value      Criterion        Change          Value      Criterion        Change %X-&yGY  
Fringe tolerance on surface 1 n;
T  
TFRN   1            -1.00000000     0.54257256    -0.00145977     1.00000000     0.54548607     0.00145374 3@WI*PMc  
Change in Focus                :      -0.000000                            0.000000 ,EJ [I^  
Fringe tolerance on surface 2 +sq,!6#G  
TFRN   2            -1.00000000     0.54177471    -0.00225762     1.00000000     0.54627463     0.00224230 A.cZa  
Change in Focus                :       0.000000                            0.000000 QBT-
J`Pz  
Fringe tolerance on surface 3 HW%bx"r+4f  
TFRN   3            -1.00000000     0.54779866     0.00376632     1.00000000     0.54022572    -0.00380662 HFCFEamBMP  
Change in Focus                :      -0.000000                            0.000000 5O;oo@A:[  
Thickness tolerance on surface 1 {]^%?]e  
TTHI   1   3        -0.20000000     0.54321462    -0.00081772     0.20000000     0.54484759     0.00081525 t6>Qe  
Change in Focus                :       0.000000                            0.000000 RgzSaP;;  
Thickness tolerance on surface 2 M#jeeE-}%  
TTHI   2   3        -0.20000000     0.54478712     0.00075478     0.20000000     0.54327558    -0.00075675 5r}(|86O/  
Change in Focus                :       0.000000                           -0.000000 ^=M(K''  
Decenter X tolerance on surfaces 1 through 3 g&(~MD2{  
TEDX   1   3        -0.20000000     0.54401464   -1.7700E-005     0.20000000     0.54401464   -1.7700E-005  C(Gb  
Change in Focus                :       0.000000                            0.000000 vh{1u  
Decenter Y tolerance on surfaces 1 through 3 Tee3U%Y  
TEDY   1   3        -0.20000000     0.54401464   -1.7700E-005     0.20000000     0.54401464   -1.7700E-005 vBQ?S2f  
Change in Focus                :       0.000000                            0.000000 :usBeho  
Tilt X tolerance on surfaces 1 through 3 (degrees) f(ec/0W  
TETX   1   3        -0.20000000     0.54897548     0.00494314     0.20000000     0.54897548     0.00494314 T%vbD*nt.  
Change in Focus                :       0.000000                            0.000000 9'L0Al~L  
Tilt Y tolerance on surfaces 1 through 3 (degrees) @T=HcUP)  
TETY   1   3        -0.20000000     0.54897548     0.00494314     0.20000000     0.54897548     0.00494314 t;PnjCD<`  
Change in Focus                :       0.000000                            0.000000 M/`z;a=EP  
Decenter X tolerance on surface 1 d:WhP_rK9  
TSDX   1            -0.20000000     0.53999563    -0.00403671     0.20000000     0.53999563    -0.00403671 c!FjHlAnP  
Change in Focus                :       0.000000                            0.000000 -(,6w?  
Decenter Y tolerance on surface 1 YY>Uf1}*9  
TSDY   1            -0.20000000     0.53999563    -0.00403671     0.20000000     0.53999563    -0.00403671 OL+40J  
Change in Focus                :       0.000000                            0.000000 @<{#v.T  
Tilt X tolerance on surface (degrees) 1 TVh7h`Eg  
TSTX   1            -0.20000000     0.42678383    -0.11724851     0.20000000     0.42678383    -0.11724851 @V CQ4X7T  
Change in Focus                :       0.000000                            0.000000 / {bK*A!  
Tilt Y tolerance on surface (degrees) 1 D`@U[`Sw  
TSTY   1            -0.20000000     0.42678383    -0.11724851     0.20000000     0.42678383    -0.11724851 SPm5tU  
Change in Focus                :       0.000000                            0.000000 Tk=3"y+u[  
Decenter X tolerance on surface 2 +s 0
Bt '  
TSDX   2            -0.20000000     0.51705427    -0.02697807     0.20000000     0.51705427    -0.02697807 <(lSNGv5N  
Change in Focus                :       0.000000                            0.000000 4sgwQ$m)  
Decenter Y tolerance on surface 2 *X55:yha  
TSDY   2            -0.20000000     0.51705427    -0.02697807     0.20000000     0.51705427    -0.02697807 PSw+E';  
Change in Focus                :       0.000000                            0.000000 31\^9w__8  
Tilt X tolerance on surface (degrees) 2 t#{>y1[29  
TSTX   2            -0.20000000     0.35349910    -0.19053324     0.20000000     0.35349910    -0.19053324 M|]1}8d?  
Change in Focus                :       0.000000                            0.000000 1:Gd{z  
Tilt Y tolerance on surface (degrees) 2 P9chRy  
TSTY   2            -0.20000000     0.35349910    -0.19053324     0.20000000     0.35349910    -0.19053324 ="eum7  
Change in Focus                :       0.000000                            0.000000 Xr;noV-X  
Decenter X tolerance on surface 3 bo/!u s#  
TSDX   3            -0.20000000     0.53419039    -0.00984195     0.20000000     0.53419039    -0.00984195 I,uu>-  
Change in Focus                :       0.000000                            0.000000 6M|%nBN$|  
Decenter Y tolerance on surface 3
F}4 0  
TSDY   3            -0.20000000     0.53419039    -0.00984195     0.20000000     0.53419039    -0.00984195 51'SA B09  
Change in Focus                :       0.000000                            0.000000 uzA'D~)P  
Tilt X tolerance on surface (degrees) 3 2g545r.  
TSTX   3            -0.20000000     0.42861670    -0.11541563     0.20000000     0.42861670    -0.11541563 W,J,h6{F  
Change in Focus                :       0.000000                            0.000000 0'}?3/u-
 
Tilt Y tolerance on surface (degrees) 3 6b)UoJxj  
TSTY   3            -0.20000000     0.42861670    -0.11541563     0.20000000     0.42861670    -0.11541563 BC[d={_-  
Change in Focus                :       0.000000                            0.000000 Vb#@o)z  
Irregularity of surface 1 in fringes *\vc_NP]  
TIRR   1            -0.20000000     0.50973587    -0.03429647     0.20000000     0.57333868     0.02930634 ',%&DA2  
Change in Focus                :       0.000000                            0.000000 <LZvh8  
Irregularity of surface 2 in fringes }}Uv0g8D  
TIRR   2            -0.20000000     0.53400904    -0.01002330     0.20000000     0.55360281     0.00957047 e
)(|  
Change in Focus                :       0.000000                            0.000000 D/`E!6Fk=  
Irregularity of surface 3 in fringes Qeog$g.HI  
TIRR   3            -0.20000000     0.58078982     0.03675748     0.20000000     0.49904394    -0.04498840 (}8 ;3pp  
Change in Focus                :       0.000000                            0.000000 rl7Y
=*Dv  
Index tolerance on surface 1 B.WkHY%/  
TIND   1            -0.00100000     0.52606778    -0.01796456     0.00100000     0.56121811     0.01718578 R/YL1s  
Change in Focus                :       0.000000                            0.000000 dEL"(e#0s4  
Index tolerance on surface 2 .NC}TFN|  
TIND   2            -0.00100000     0.55639086     0.01235852     0.00100000     0.53126361    -0.01276872 M.Ik%nN#K0  
Change in Focus                :       0.000000                           -0.000000 ,]"u!,yHb  
g3rFJc  
Worst offenders: {`zF{AW8q  
Type                      Value      Criterion        Change ~` hcgCi%  
TSTY   2            -0.20000000     0.35349910    -0.19053324 *xC '  
TSTY   2             0.20000000     0.35349910    -0.19053324 8hp]+k_y  
TSTX   2            -0.20000000     0.35349910    -0.19053324 eP?|U.on  
TSTX   2             0.20000000     0.35349910    -0.19053324 #^V"=RbD  
TSTY   1            -0.20000000     0.42678383    -0.11724851 I\23as0q  
TSTY   1             0.20000000     0.42678383    -0.11724851 mm`3-F|  
TSTX   1            -0.20000000     0.42678383    -0.11724851 0/]vmDr  
TSTX   1             0.20000000     0.42678383    -0.11724851 Q.AM  
TSTY   3            -0.20000000     0.42861670    -0.11541563 t}
gqk'  
TSTY   3             0.20000000     0.42861670    -0.11541563 YPEd XU8}  
Shd,{Z)-Tg  
Estimated Performance Changes based upon Root-Sum-Square method: xGA0] _  
Nominal MTF                 :     0.54403234 Qd?P[xm  
Estimated change            :    -0.36299231 ;N|>pSzmL  
Estimated MTF               :     0.18104003 PBv43uIL  
,
&SJ?XAs  
Compensator Statistics: ?Sxnq#r#  
Change in back focus: G9q0E|  
Minimum            :        -0.000000 2[hl^f^%,  
Maximum            :         0.000000 5i?U-  
Mean               :        -0.000000 Uo ,3 lMr  
Standard Deviation :         0.000000 KA#-X2U/  
<|iU+.j\  
Monte Carlo Analysis: <i|+p1t  
Number of trials: 20 w%\;|y4+  
u{,^
#I}  
Initial Statistics: Normal Distribution p]oo^  
tPHiz%  
  Trial       Criterion        Change ja
2]VbB  
      1     0.42804416    -0.11598818 "kC>EtaX  
Change in Focus                :      -0.400171 |93%,  
      2     0.54384387    -0.00018847 iz(+(M  
Change in Focus                :       1.018470 8hg(6 XUG  
      3     0.44510003    -0.09893230 5KSsRq/8"  
Change in Focus                :      -0.601922 ;4IP7$3G  
      4     0.18154684    -0.36248550 \zwb>^  
Change in Focus                :       0.920681 =I1@O9}+i  
      5     0.28665820    -0.25737414 H<yec"  
Change in Focus                :       1.253875 Z5=!R$4  
      6     0.21263372    -0.33139862 )J0VB't  
Change in Focus                :      -0.903878 &Te:l-x  
      7     0.40051424    -0.14351809 *79<ypKG$  
Change in Focus                :      -1.354815 HApP*1J^c  
      8     0.48754161    -0.05649072 V2.K*CpZ7  
Change in Focus                :       0.215922 Yt^+31/%  
      9     0.40357468    -0.14045766 (XH)1 -Z!  
Change in Focus                :       0.281783 9[*kpMC  
     10     0.26315315    -0.28087919 >Z%^|S9  
Change in Focus                :      -1.048393 !l|Qyk[  
     11     0.26120585    -0.28282649 /MC\!,K  
Change in Focus                :       1.017611 eC-TZH@  
     12     0.24033815    -0.30369419 {65X37W  
Change in Focus                :      -0.109292 2h!3[{M\  
     13     0.37164046    -0.17239188 ES>3Cf
 
Change in Focus                :      -0.692430 )C@,mgh  
     14     0.48597489    -0.05805744 Y>+D\|%
Q  
Change in Focus                :      -0.662040 n_<]9  
     15     0.21462327    -0.32940907 ^9nM)[/C?  
Change in Focus                :       1.611296 :Us-^zVr  
     16     0.43378226    -0.11025008 cPXvTVvs  
Change in Focus                :      -0.640081 0)NHjKP  
     17     0.39321881    -0.15081353 /%7eo?@,  
Change in Focus                :       0.914906 u=[oo@Rk`  
     18     0.20692530    -0.33710703 pLU>vQA  
Change in Focus                :       0.801607 S]>_o"|HV  
     19     0.51374068    -0.03029165 u@HP@>V  
Change in Focus                :       0.947293 ){}#v&  
     20     0.38013374    -0.16389860 PD?H5W3@  
Change in Focus                :       0.667010 N%a[Y  
}b
VyvH  
Number of traceable Monte Carlo files generated: 20 i469<^A  
R&QT  'i  
Nominal     0.54403234 /dqKFxB1  
Best        0.54384387    Trial     2  P/Zo  
Worst       0.18154684    Trial     4 sw1XN?O  
Mean        0.35770970 zM!*r~*k$  
Std Dev     0.11156454 '54@-}D  
Oq("E(z+f  
T^'i+>F!w  
Compensator Statistics: ZDf9Npe  
Change in back focus: !ZVMx*1Cf  
Minimum            :        -1.354815 O6pjuhMx  
Maximum            :         1.611296 vcmS]$}  
Mean               :         0.161872 YpL}R#  
Standard Deviation :         0.869664 ZBGI_9wZ  
<3qbgn>}b  
90% >       0.20977951               E(oNS\4  
80% >       0.22748071               it,%T)2H  
50% >       0.38667627               (F)zj<{f  
20% >       0.46553746               nxt1Y04,H  
10% >       0.50064115                LP~$7a  
%(E6ADB  
End of Run. $lqV(s  
=mZw71,  
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 L*Y}pO  

图片:3.JPG

g#AA.@/Z  
?tcbiXRG+  
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 n
RGH58  
$Z j.  
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                 1w5nBVC*$V  
80% >       0.22748071                 h<j04fj  
50% >       0.38667627                 FLWz7Rj  
20% >       0.46553746                 ;?&;I
!  
10% >       0.50064115 3.jwOFH$  

}bHpFe  
最后这个数值是MTF值呢，还是MTF的公差？ d/^^8XUK  
D(&OyZ~Q+  
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？？？   o ZAjta_4  
t.w?OyO  
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  : WS(c0c  
90% >       0.20977951                 w5;EnI  
80% >       0.22748071                 ooAZ,l=8  
50% >       0.38667627                 UvI!e4_  
20% >       0.46553746                 3l^pY18H'  
10% >       0.50064115 w7C=R8^  
....... C+k>Ajr  

HI?>]zz|  
]]7T5'.  
这些数值都是MTF值

Criterion           : Geometric MTF average S&T at 30.0000 cycles per mm   ]'G7(Y\)f  
Mode                : Sensitivities GyCpGP|AZ  
Sampling            : 2 .DQ]q o]OG  
Nominal Criterion   : 0.54403234 V6k9L*VP  
Test Wavelength     : 0.6328 ka*UyW}  
ZKvh]  
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？ F\I^d]#,[  
!xI![N^  
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