[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 x_?K6[G&}  
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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 [fb9;,x`  
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图片:2.jpg

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然后运行分析的结果如下： EM+! ph  
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Analysis of Tolerances XpK  Y#  
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File : E:\光学设计资料\zemax练习\f500.ZMX uGW#z_{(n  
Title: tx`^'%GMA  
Date : TUE JUN 21 2011 \_(0V"  
Zp6VH  
Units are Millimeters. o_kZ  
All changes are computed using linear differences. v4uQ0~k~X  
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Paraxial Focus compensation only. wc"~8Ah  
R$`&g@P="  
WARNING: Solves should be removed prior to tolerancing. ?A r}QN  
b'R]DS{8  
Mnemonics: f(!cz,y^\*  
TFRN: Tolerance on curvature in fringes. >qO
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TTHI: Tolerance on thickness.
$*P+  
TSDX: Tolerance on surface decentering in x. r;H#cMj  
TSDY: Tolerance on surface decentering in y. pmi[M)D  
TSTX: Tolerance on surface tilt in x (degrees). "SWL@}8vx  
TSTY: Tolerance on surface tilt in y (degrees). yGC HWP  
TIRR: Tolerance on irregularity (fringes). 2\+N<-(F5  
TIND: Tolerance on Nd index of refraction. I|c?*~7*  
TEDX: Tolerance on element decentering in x. *H=h7ESq  
TEDY: Tolerance on element decentering in y. M\IdQY-c  
TETX: Tolerance on element tilt in x (degrees). Xqew~R^MP  
TETY: Tolerance on element tilt in y (degrees). U-f8D  
J#iuF'%Ds  
WARNING: RAY AIMING IS OFF. Very loose tolerances may not be computed accurately. * 0JF|'  
<veypLi"R  
WARNING: Boundary constraints on compensators will be ignored. Lk^bzW>f  
7*Zm{r@u  
Criterion           : Geometric MTF average S&T at 30.0000 cycles per mm /6n"$qon6  
Mode                : Sensitivities cSG(kFQ  
Sampling            : 2 0%IZ -])  
Nominal Criterion   : 0.54403234 oq1wU
@n  
Test Wavelength     : 0.6328 |gINB3L  
QAZs1;lU  
HAs/f#zAk6  
Fields: XY Symmetric Angle in degrees .i` -t"  
#      X-Field      Y-Field       Weight    VDX    VDY    VCX    VCY N#R8ez`  
1   0.000E+000   0.000E+000   1.000E+000  0.000  0.000  0.000  0.000 \X]I: 0^j  
Pmr'W\aIR  
Sensitivity Analysis: q1r-xsjV=  
F%%mcmHD#  
                 |----------------- Minimum ----------------| |----------------- Maximum ----------------| &fkH\o7)  
Type                      Value      Criterion        Change          Value      Criterion        Change JPgFTr  
Fringe tolerance on surface 1 Olt;^>MQ  
TFRN   1            -1.00000000     0.54257256    -0.00145977     1.00000000     0.54548607     0.00145374 T`<Tj?:^&  
Change in Focus                :      -0.000000                            0.000000 B/hQvA;(  
Fringe tolerance on surface 2 gssEdJ  
TFRN   2            -1.00000000     0.54177471    -0.00225762     1.00000000     0.54627463     0.00224230 ;9J6)zg !n  
Change in Focus                :       0.000000                            0.000000 G-]_ d  
Fringe tolerance on surface 3 b0se-#+  
TFRN   3            -1.00000000     0.54779866     0.00376632     1.00000000     0.54022572    -0.00380662 L"jjD:  
Change in Focus                :      -0.000000                            0.000000 r(n>N0:0Ls  
Thickness tolerance on surface 1 .O+,1&D5  
TTHI   1   3        -0.20000000     0.54321462    -0.00081772     0.20000000     0.54484759     0.00081525 c5i7mx:.  
Change in Focus                :       0.000000                            0.000000 6KN6SN$  
Thickness tolerance on surface 2 /@DJf\`vM  
TTHI   2   3        -0.20000000     0.54478712     0.00075478     0.20000000     0.54327558    -0.00075675 SVV-zz]3M  
Change in Focus                :       0.000000                           -0.000000 />>KCmc  
Decenter X tolerance on surfaces 1 through 3 R7FI{A  
TEDX   1   3        -0.20000000     0.54401464   -1.7700E-005     0.20000000     0.54401464   -1.7700E-005 WBzPSnS2  
Change in Focus                :       0.000000                            0.000000 PBiA/dG[;  
Decenter Y tolerance on surfaces 1 through 3 W}(T5D" 3x  
TEDY   1   3        -0.20000000     0.54401464   -1.7700E-005     0.20000000     0.54401464   -1.7700E-005 .=hVto[QC  
Change in Focus                :       0.000000                            0.000000 Lo}/k}3Sx  
Tilt X tolerance on surfaces 1 through 3 (degrees) *F(<:
3;2  
TETX   1   3        -0.20000000     0.54897548     0.00494314     0.20000000     0.54897548     0.00494314 ; =*=P8&5  
Change in Focus                :       0.000000                            0.000000 , BZ(-M  
Tilt Y tolerance on surfaces 1 through 3 (degrees) FZ8Qj8  
TETY   1   3        -0.20000000     0.54897548     0.00494314     0.20000000     0.54897548     0.00494314 k%s,(2)30  
Change in Focus                :       0.000000                            0.000000 %Z*)<[cIE0  
Decenter X tolerance on surface 1 "Z dI~
 
TSDX   1            -0.20000000     0.53999563    -0.00403671     0.20000000     0.53999563    -0.00403671 {)Wa"|+  
Change in Focus                :       0.000000                            0.000000 Ru);wzky  
Decenter Y tolerance on surface 1 :."+&gb  
TSDY   1            -0.20000000     0.53999563    -0.00403671     0.20000000     0.53999563    -0.00403671 :kjs: 6f]  
Change in Focus                :       0.000000                            0.000000 Ou f\%E<  
Tilt X tolerance on surface (degrees) 1 ]{ch
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TSTX   1            -0.20000000     0.42678383    -0.11724851     0.20000000     0.42678383    -0.11724851 2%H_%Zu9  
Change in Focus                :       0.000000                            0.000000 ,hT**(W  
Tilt Y tolerance on surface (degrees) 1 AOTtAV_e  
TSTY   1            -0.20000000     0.42678383    -0.11724851     0.20000000     0.42678383    -0.11724851 T[cJ
  
Change in Focus                :       0.000000                            0.000000 F hyY+{%  
Decenter X tolerance on surface 2 )$*B  
TSDX   2            -0.20000000     0.51705427    -0.02697807     0.20000000     0.51705427    -0.02697807 `\=~ $&vjC  
Change in Focus                :       0.000000                            0.000000 ,bB}lU)  
Decenter Y tolerance on surface 2 jD6T2K7i  
TSDY   2            -0.20000000     0.51705427    -0.02697807     0.20000000     0.51705427    -0.02697807 Ms+SJ5Lg  
Change in Focus                :       0.000000                            0.000000 #TeAw<2U  
Tilt X tolerance on surface (degrees) 2 ZHj7^y@P  
TSTX   2            -0.20000000     0.35349910    -0.19053324     0.20000000     0.35349910    -0.19053324 W(.svJUgb.  
Change in Focus                :       0.000000                            0.000000 8'v:26   
Tilt Y tolerance on surface (degrees) 2 ;^)4u  
TSTY   2            -0.20000000     0.35349910    -0.19053324     0.20000000     0.35349910    -0.19053324 xa{.hp?  
Change in Focus                :       0.000000                            0.000000 MY(
51)*  
Decenter X tolerance on surface 3 |]Y6*uEX<  
TSDX   3            -0.20000000     0.53419039    -0.00984195     0.20000000     0.53419039    -0.00984195 W3R43>$  
Change in Focus                :       0.000000                            0.000000 xZQyH  
Decenter Y tolerance on surface 3 sLK$H|%>m  
TSDY   3            -0.20000000     0.53419039    -0.00984195     0.20000000     0.53419039    -0.00984195 FEV Ya#S  
Change in Focus                :       0.000000                            0.000000 D<*)^^  
Tilt X tolerance on surface (degrees) 3 ,}Im^~5  
TSTX   3            -0.20000000     0.42861670    -0.11541563     0.20000000     0.42861670    -0.11541563 ]^@m $O  
Change in Focus                :       0.000000                            0.000000 %PK(Z*>  
Tilt Y tolerance on surface (degrees) 3 (^<skx>  
TSTY   3            -0.20000000     0.42861670    -0.11541563     0.20000000     0.42861670    -0.11541563 _m%Ab3iT~  
Change in Focus                :       0.000000                            0.000000 v\}{eP'  
Irregularity of surface 1 in fringes 6/Z_r0^O  
TIRR   1            -0.20000000     0.50973587    -0.03429647     0.20000000     0.57333868     0.02930634 $:v
S_#  
Change in Focus                :       0.000000                            0.000000 C2DAsSw  
Irregularity of surface 2 in fringes HisH\z/i5)  
TIRR   2            -0.20000000     0.53400904    -0.01002330     0.20000000     0.55360281     0.00957047 }5B\:*yW  
Change in Focus                :       0.000000                            0.000000 G^/8^Zi  
Irregularity of surface 3 in fringes JbXi|OS/  
TIRR   3            -0.20000000     0.58078982     0.03675748     0.20000000     0.49904394    -0.04498840 zzT4+wy`  
Change in Focus                :       0.000000                            0.000000 b.)jJLWv@  
Index tolerance on surface 1 Jl$ X3wE  
TIND   1            -0.00100000     0.52606778    -0.01796456     0.00100000     0.56121811     0.01718578 5R1?jlm  
Change in Focus                :       0.000000                            0.000000 zq|Nlt
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Index tolerance on surface 2 w3ZOCWJS  
TIND   2            -0.00100000     0.55639086     0.01235852     0.00100000     0.53126361    -0.01276872 e&Z ?I2J  
Change in Focus                :       0.000000                           -0.000000 OgCNqW d-  
@CC 6`D  
Worst offenders: %V#? 1{  
Type                      Value      Criterion        Change UcB2Aauji  
TSTY   2            -0.20000000     0.35349910    -0.19053324 SJsbuLxR  
TSTY   2             0.20000000     0.35349910    -0.19053324 +9#qNkP  
TSTX   2            -0.20000000     0.35349910    -0.19053324 G P '-  
TSTX   2             0.20000000     0.35349910    -0.19053324 D\DwBZ>  
TSTY   1            -0.20000000     0.42678383    -0.11724851 |HwEwL+  
TSTY   1             0.20000000     0.42678383    -0.11724851 [X@JH6U r  
TSTX   1            -0.20000000     0.42678383    -0.11724851 LvL2[xh%&  
TSTX   1             0.20000000     0.42678383    -0.11724851 71\GK  
TSTY   3            -0.20000000     0.42861670    -0.11541563 acj-*I  
TSTY   3             0.20000000     0.42861670    -0.11541563 q3
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MK!Aq^Jz  
Estimated Performance Changes based upon Root-Sum-Square method: 1I8<6pi-  
Nominal MTF                 :     0.54403234 \|Y_,fi  
Estimated change            :    -0.36299231 IPt !gSp  
Estimated MTF               :     0.18104003 hF5(1s}e$  
aTBFF  
Compensator Statistics: \[wbJ  
Change in back focus: n6C!5zq7U  
Minimum            :        -0.000000 6 8Vxy  
Maximum            :         0.000000 65rf=*kz:  
Mean               :        -0.000000 r<Q0zKW!jN  
Standard Deviation :         0.000000 _93:_L  
nrbP3sf*  
Monte Carlo Analysis: ( F4c0  
Number of trials: 20 $JiypX^DOP  
[|(=15;  
Initial Statistics: Normal Distribution #E_
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bb-u'"5^]  
  Trial       Criterion        Change s$^2Qp  
      1     0.42804416    -0.11598818 D|'[[=  
Change in Focus                :      -0.400171 A}_pJH  
      2     0.54384387    -0.00018847 
VWqZ`X  
Change in Focus                :       1.018470 8K&=]:(  
      3     0.44510003    -0.09893230 &/g^J\0M)  
Change in Focus                :      -0.601922 3L{)Y`P  
      4     0.18154684    -0.36248550 g3(LDqB'.  
Change in Focus                :       0.920681 6Q]JY,+  
      5     0.28665820    -0.25737414 U+!&~C^y  
Change in Focus                :       1.253875 Hv%$6,/*v  
      6     0.21263372    -0.33139862 XaMsIyhI  
Change in Focus                :      -0.903878 +R;s<pZ^  
      7     0.40051424    -0.14351809 ;ssI8\LG  
Change in Focus                :      -1.354815 9xFI%UOb#  
      8     0.48754161    -0.05649072 zA/Fh(uX  
Change in Focus                :       0.215922 xRqA^Ad  
      9     0.40357468    -0.14045766 9VSi2p*  
Change in Focus                :       0.281783 \[ 4y  
     10     0.26315315    -0.28087919 |n~,{=  
Change in Focus                :      -1.048393 6r`Xi&  
     11     0.26120585    -0.28282649 Xx\,<8Xn  
Change in Focus                :       1.017611 al7D3J  
     12     0.24033815    -0.30369419 'c3'eJ0  
Change in Focus                :      -0.109292 8fPTxvXqL  
     13     0.37164046    -0.17239188 `Io#440;  
Change in Focus                :      -0.692430 /NxuNi;5  
     14     0.48597489    -0.05805744 -x|!?u5F  
Change in Focus                :      -0.662040 [ B*r{  
     15     0.21462327    -0.32940907 n98sY+$-z  
Change in Focus                :       1.611296 M;YJpi  
     16     0.43378226    -0.11025008 )RQQhB  
Change in Focus                :      -0.640081 !t\sg  
     17     0.39321881    -0.15081353 F6
C7k9  
Change in Focus                :       0.914906
QXgfjo  
     18     0.20692530    -0.33710703 t=fP^bJ  
Change in Focus                :       0.801607 @|e we.r  
     19     0.51374068    -0.03029165 3jHg9M23[^  
Change in Focus                :       0.947293 '~1Zr uO  
     20     0.38013374    -0.16389860 6E.[F\u  
Change in Focus                :       0.667010 (*AJ6BQWa  
6;;2e> e  
Number of traceable Monte Carlo files generated: 20 U\M9sTqo  
c:<a"$  
Nominal     0.54403234 _'
*(-K5&  
Best        0.54384387    Trial     2 q$Ms7`a  
Worst       0.18154684    Trial     4 4&v&XLkb  
Mean        0.35770970 7U2B=]<e-  
Std Dev     0.11156454 `7[!bCl  
0|8cSE< i  
.i^@v<+  
Compensator Statistics: 7z
Ifsb  
Change in back focus: 0Gu?;]GSv  
Minimum            :        -1.354815 "bQi+@  
Maximum            :         1.611296 )g}G{9M^  
Mean               :         0.161872 `,4@;j<^@  
Standard Deviation :         0.869664 aIh} j,  
&>QxL d#  
90% >       0.20977951               !YZKa-  
80% >       0.22748071               *zW]IQ'A  
50% >       0.38667627               5u3KL A  
20% >       0.46553746               -Kcjnl92i  
10% >       0.50064115                #zBqj;p  
D0z[h(m  
End of Run. 4;eD}g
  
VE}r'MBk  
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 'fCSP|  

图片:3.JPG

m9+?>/R  
B]6Lbp"oo  
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 %5nEyZOq  
>y(loMl  
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                 hZ!kh3@:`  
80% >       0.22748071                 _`p^B%[  
50% >       0.38667627                 u0G tzk  
20% >       0.46553746                 *::.Uo4O  
10% >       0.50064115 tE <?L  
]<L~f~vU  
最后这个数值是MTF值呢，还是MTF的公差？ @^ *62  
@+Sr~:K  
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？？？   78~/1-  
c~;VvYu  
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  : b7I0R;Zj  
90% >       0.20977951                 ]?wz.  
80% >       0.22748071                 {=mGXd`x?l  
50% >       0.38667627                 GiEt;8  
20% >       0.46553746                 vt*  
10% >       0.50064115 K%mR=u#%&  
....... JoiGuZd>  

C58o="L3S  
nXoDI1<[  
这些数值都是MTF值

Criterion           : Geometric MTF average S&T at 30.0000 cycles per mm   <,n:w[+!`P  
Mode                : Sensitivities R#;xBBt8  
Sampling            : 2 Ew|Z<(  
Nominal Criterion   : 0.54403234 bEQ-?X%7  
Test Wavelength     : 0.6328 S\:+5}  
Qg(;>ops  
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？ (&/4wI^M  
tJ>>cFx  
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