[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 E%np-is{1  
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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 u0?,CQPL  
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图片:2.jpg

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然后运行分析的结果如下： ? 1 ~C`I;  
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Analysis of Tolerances W,-fnJk  
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File : E:\光学设计资料\zemax练习\f500.ZMX wzNGL{3  
Title: G~FAChI8![  
Date : TUE JUN 21 2011 T$vDw|KSVP  
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Units are Millimeters. se]q~<&  
All changes are computed using linear differences. ?o883!&v  

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Paraxial Focus compensation only. fXfO9{E  
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WARNING: Solves should be removed prior to tolerancing. IuN:*P  
QsC6\Gt#  
Mnemonics: JR^#NefJ  
TFRN: Tolerance on curvature in fringes. :W*']8 M-  
TTHI: Tolerance on thickness. S{7 R6,B5  
TSDX: Tolerance on surface decentering in x. LqcHsUFj  
TSDY: Tolerance on surface decentering in y. Xn3 \a81  
TSTX: Tolerance on surface tilt in x (degrees). qdY*y&}"J  
TSTY: Tolerance on surface tilt in y (degrees). iW$f1=i  
TIRR: Tolerance on irregularity (fringes). u~\I  
TIND: Tolerance on Nd index of refraction. 5A`T}~"X  
TEDX: Tolerance on element decentering in x. Yj#4{2A  
TEDY: Tolerance on element decentering in y. SQ0t28N3h  
TETX: Tolerance on element tilt in x (degrees). TL*8h7.(  
TETY: Tolerance on element tilt in y (degrees). dWDM{t\}\  
=lG/A[66  
WARNING: RAY AIMING IS OFF. Very loose tolerances may not be computed accurately. z(JDLd  
*Iir/6myM  
WARNING: Boundary constraints on compensators will be ignored. 6E0{(*  
,bnrVa(I  
Criterion           : Geometric MTF average S&T at 30.0000 cycles per mm [)L)R`  
Mode                : Sensitivities BMxe)izT;  
Sampling            : 2 Ubf@"B  
Nominal Criterion   : 0.54403234 ,p7W4;?4  
Test Wavelength     : 0.6328 2Pz)vnV"  
9:1[4o)~  
MlmdfO%Y  
Fields: XY Symmetric Angle in degrees jt,dr3|/n  
#      X-Field      Y-Field       Weight    VDX    VDY    VCX    VCY ),;O3:n  
1   0.000E+000   0.000E+000   1.000E+000  0.000  0.000  0.000  0.000 ccm(r~lhJ  
8P[aX3T7G  
Sensitivity Analysis: RZr
Q^tI3"  
O=2SDuBZ  
                 |----------------- Minimum ----------------| |----------------- Maximum ----------------| at5>h   
Type                      Value      Criterion        Change          Value      Criterion        Change +:jx{*}jo  
Fringe tolerance on surface 1 9zs!rlzQ  
TFRN   1            -1.00000000     0.54257256    -0.00145977     1.00000000     0.54548607     0.00145374 8 O% ?t  
Change in Focus                :      -0.000000                            0.000000 X^c2  
Fringe tolerance on surface 2 y L|'K}  
TFRN   2            -1.00000000     0.54177471    -0.00225762     1.00000000     0.54627463     0.00224230 \;F_QV  
Change in Focus                :       0.000000                            0.000000 /lqVMlz\77  
Fringe tolerance on surface 3 O[RivHCY  
TFRN   3            -1.00000000     0.54779866     0.00376632     1.00000000     0.54022572    -0.00380662 @M_p3[c\  
Change in Focus                :      -0.000000                            0.000000 b<1+q{0r  
Thickness tolerance on surface 1 y3{F\K  
TTHI   1   3        -0.20000000     0.54321462    -0.00081772     0.20000000     0.54484759     0.00081525 ~;uc@GGo  
Change in Focus                :       0.000000                            0.000000 gtVnn]Jh  
Thickness tolerance on surface 2 T**v!Ls  
TTHI   2   3        -0.20000000     0.54478712     0.00075478     0.20000000     0.54327558    -0.00075675 `Eq~W@';Q0  
Change in Focus                :       0.000000                           -0.000000 ~f5g\n;  
Decenter X tolerance on surfaces 1 through 3 5kbbeO|0G  
TEDX   1   3        -0.20000000     0.54401464   -1.7700E-005     0.20000000     0.54401464   -1.7700E-005 ;eQOBGX9  
Change in Focus                :       0.000000                            0.000000 G}8Zkz@+  
Decenter Y tolerance on surfaces 1 through 3 EnD}|9  
TEDY   1   3        -0.20000000     0.54401464   -1.7700E-005     0.20000000     0.54401464   -1.7700E-005 Vq>$ZlvS  
Change in Focus                :       0.000000                            0.000000 5wgeA^HE2y  
Tilt X tolerance on surfaces 1 through 3 (degrees) '7;b+Vbl#  
TETX   1   3        -0.20000000     0.54897548     0.00494314     0.20000000     0.54897548     0.00494314 guc[du  
Change in Focus                :       0.000000                            0.000000 _Cnl|'  
Tilt Y tolerance on surfaces 1 through 3 (degrees) zC<k4[.  
TETY   1   3        -0.20000000     0.54897548     0.00494314     0.20000000     0.54897548     0.00494314 K#_x.:<J  
Change in Focus                :       0.000000                            0.000000 PbpnjvVrM  
Decenter X tolerance on surface 1 GX-V|hLaGX  
TSDX   1            -0.20000000     0.53999563    -0.00403671     0.20000000     0.53999563    -0.00403671 Z?"f#  
Change in Focus                :       0.000000                            0.000000 (eEs0  
Decenter Y tolerance on surface 1 W3aFao>!OZ  
TSDY   1            -0.20000000     0.53999563    -0.00403671     0.20000000     0.53999563    -0.00403671 /.m&rS  
Change in Focus                :       0.000000                            0.000000 {.mPe|  
Tilt X tolerance on surface (degrees) 1 q47:kB{d  
TSTX   1            -0.20000000     0.42678383    -0.11724851     0.20000000     0.42678383    -0.11724851 1 |T{RY5  
Change in Focus                :       0.000000                            0.000000 !${7)=|=1  
Tilt Y tolerance on surface (degrees) 1 14Y<-OO: k  
TSTY   1            -0.20000000     0.42678383    -0.11724851     0.20000000     0.42678383    -0.11724851 & cV$`L  
Change in Focus                :       0.000000                            0.000000 M|DVFC  
Decenter X tolerance on surface 2 +$y%H  
TSDX   2            -0.20000000     0.51705427    -0.02697807     0.20000000     0.51705427    -0.02697807 BWG*UjP M  
Change in Focus                :       0.000000                            0.000000 qGVf!R  
Decenter Y tolerance on surface 2 %!X9>i>  
TSDY   2            -0.20000000     0.51705427    -0.02697807     0.20000000     0.51705427    -0.02697807 X" m0||  
Change in Focus                :       0.000000                            0.000000 97 eEqI$#  
Tilt X tolerance on surface (degrees) 2 0tb%h[%,M  
TSTX   2            -0.20000000     0.35349910    -0.19053324     0.20000000     0.35349910    -0.19053324 RJhafUJ zH  
Change in Focus                :       0.000000                            0.000000 
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Tilt Y tolerance on surface (degrees) 2 =R6IW,*  
TSTY   2            -0.20000000     0.35349910    -0.19053324     0.20000000     0.35349910    -0.19053324 7G]v(ay  
Change in Focus                :       0.000000                            0.000000 R q |,@  
Decenter X tolerance on surface 3 1~aP)q  
TSDX   3            -0.20000000     0.53419039    -0.00984195     0.20000000     0.53419039    -0.00984195 HY!R|  
Change in Focus                :       0.000000                            0.000000 !9p;%Ny`  
Decenter Y tolerance on surface 3 d":GsI?3  
TSDY   3            -0.20000000     0.53419039    -0.00984195     0.20000000     0.53419039    -0.00984195 OAw- -rl  
Change in Focus                :       0.000000                            0.000000 z}z 6Vg  
Tilt X tolerance on surface (degrees) 3 [Zxv&$SQ  
TSTX   3            -0.20000000     0.42861670    -0.11541563     0.20000000     0.42861670    -0.11541563 DElrY)3O.  
Change in Focus                :       0.000000                            0.000000 $s.:H4:I  
Tilt Y tolerance on surface (degrees) 3 (<KFA,  
TSTY   3            -0.20000000     0.42861670    -0.11541563     0.20000000     0.42861670    -0.11541563 5x?YFq6k  
Change in Focus                :       0.000000                            0.000000 d
YxX%"J  
Irregularity of surface 1 in fringes -g\;B  
TIRR   1            -0.20000000     0.50973587    -0.03429647     0.20000000     0.57333868     0.02930634 "&Rt&S  
Change in Focus                :       0.000000                            0.000000 sFbN)Cx  
Irregularity of surface 2 in fringes ZULnS*V;5  
TIRR   2            -0.20000000     0.53400904    -0.01002330     0.20000000     0.55360281     0.00957047 !%X#;{  
Change in Focus                :       0.000000                            0.000000 A}3dx!?7j  
Irregularity of surface 3 in fringes zN3b`K. i  
TIRR   3            -0.20000000     0.58078982     0.03675748     0.20000000     0.49904394    -0.04498840 Nbvs_>N  
Change in Focus                :       0.000000                            0.000000 j[Q9_0R~lR  
Index tolerance on surface 1 r?2EJE2{V  
TIND   1            -0.00100000     0.52606778    -0.01796456     0.00100000     0.56121811     0.01718578 {$xt.<  
Change in Focus                :       0.000000                            0.000000 N5d)&a 7?  
Index tolerance on surface 2 SE<?l  
TIND   2            -0.00100000     0.55639086     0.01235852     0.00100000     0.53126361    -0.01276872 s~'"&0Gz  
Change in Focus                :       0.000000                           -0.000000 4
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Worst offenders: VSjt|F)t  
Type                      Value      Criterion        Change f"RS,]  
TSTY   2            -0.20000000     0.35349910    -0.19053324 H ]z83:Z  
TSTY   2             0.20000000     0.35349910    -0.19053324 O;lGh1.  
TSTX   2            -0.20000000     0.35349910    -0.19053324 qd<-{  
TSTX   2             0.20000000     0.35349910    -0.19053324 lx\9Y8  
TSTY   1            -0.20000000     0.42678383    -0.11724851 c]%~X&Tg`  
TSTY   1             0.20000000     0.42678383    -0.11724851 q>rDxmP<  
TSTX   1            -0.20000000     0.42678383    -0.11724851 ?Gqq]ozm  
TSTX   1             0.20000000     0.42678383    -0.11724851 :Xi&H.k)p  
TSTY   3            -0.20000000     0.42861670    -0.11541563 NH'Dz6K5  
TSTY   3             0.20000000     0.42861670    -0.11541563 uL{CUt  
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Estimated Performance Changes based upon Root-Sum-Square method: 6o d^+>U  
Nominal MTF                 :     0.54403234 +l hJ8&  
Estimated change            :    -0.36299231 LU $=j  
Estimated MTF               :     0.18104003 p?2^JJpUb  
=6'Fm$R  
Compensator Statistics: 8I[=iU7]l  
Change in back focus: ]?%S0DO*  
Minimum            :        -0.000000 UQ#t &  
Maximum            :         0.000000 @1N.;]|  
Mean               :        -0.000000 ?DGg.2f  
Standard Deviation :         0.000000 H<9_BA?  
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Monte Carlo Analysis: &u2H^ j  
Number of trials: 20 Z`<5SHQd  
X;]Ijha<*  
Initial Statistics: Normal Distribution B~B,L*kC2  
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  Trial       Criterion        Change 
R-YNg  
      1     0.42804416    -0.11598818 wxo*\WLe  
Change in Focus                :      -0.400171 UC_o;  
      2     0.54384387    -0.00018847 =P%?{7  
Change in Focus                :       1.018470 {l"(EeW6)  
      3     0.44510003    -0.09893230 +ib&6IU  
Change in Focus                :      -0.601922 K7X*N  
      4     0.18154684    -0.36248550 Ae\:{[c_D  
Change in Focus                :       0.920681 h~lps?.#b  
      5     0.28665820    -0.25737414 Z!-V&H.
 
Change in Focus                :       1.253875 "5204I  
      6     0.21263372    -0.33139862 K0~=9/  
Change in Focus                :      -0.903878 3rBID  
      7     0.40051424    -0.14351809 2HO2  
Change in Focus                :      -1.354815 6 2#@Y-5  
      8     0.48754161    -0.05649072 xXlx}C  
Change in Focus                :       0.215922 K@%gvLa\  
      9     0.40357468    -0.14045766 (8baa.ge  
Change in Focus                :       0.281783 +Sc2'z>R  
     10     0.26315315    -0.28087919 ,xg-H6Xfa{  
Change in Focus                :      -1.048393 xR8y"CpE  
     11     0.26120585    -0.28282649 + }$(j#h  
Change in Focus                :       1.017611 &NOCRabc  
     12     0.24033815    -0.30369419 n&,X']z.  
Change in Focus                :      -0.109292 P?^%i  
     13     0.37164046    -0.17239188 osc A\r  
Change in Focus                :      -0.692430 pk`5RDBu  
     14     0.48597489    -0.05805744 X.sOZb?$  
Change in Focus                :      -0.662040 \l%##7DRp]  
     15     0.21462327    -0.32940907 Z;S)GUG^  
Change in Focus                :       1.611296 d3\KUR^  
     16     0.43378226    -0.11025008 # [ +n(  
Change in Focus                :      -0.640081 #"8'y  
     17     0.39321881    -0.15081353 j\"d/{7Q  
Change in Focus                :       0.914906 yuC|_nL  
     18     0.20692530    -0.33710703 M3Qi]jO98  
Change in Focus                :       0.801607 l$[,V:N  
     19     0.51374068    -0.03029165 m%'T90mi  
Change in Focus                :       0.947293 hXvC>ie(i  
     20     0.38013374    -0.16389860 L1WvX6  
Change in Focus                :       0.667010 Xvk+1:D  
\r9E6LLX'  
Number of traceable Monte Carlo files generated: 20 ii&ckg>]z  
-BSO$'{7  
Nominal     0.54403234 f:t j   
Best        0.54384387    Trial     2 cY Qm8TR<  
Worst       0.18154684    Trial     4 c>3j$D+  
Mean        0.35770970 }u8g7Nj  
Std Dev     0.11156454 q6b&b^r+H  
8 &v)Vi-  
'Fc$?$c\  
Compensator Statistics: p"7[heExw  
Change in back focus: P,b&

F  
Minimum            :        -1.354815 !@*= b1  
Maximum            :         1.611296 jcjl q-x  
Mean               :         0.161872 Q+/P>5O/  
Standard Deviation :         0.869664 R T~oJ~t;  
A2p%Y},  
90% >       0.20977951               f]mVM(XZN  
80% >       0.22748071               9-vQn/O^D  
50% >       0.38667627               oIQ$98M  
20% >       0.46553746               6y "]2UgQk  
10% >       0.50064115                >^
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I-=Ieq"R9  
End of Run. !]5V{3  
3[m2F O,Z  
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
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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 bR1Q77<G\  
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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                 F
Fe{=H,=  
80% >       0.22748071                 #/8 Nav  
50% >       0.38667627                 ZR"qrCSw`  
20% >       0.46553746                 e\f\CMb  
10% >       0.50064115 o*"Q{Xh#Qd  
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最后这个数值是MTF值呢，还是MTF的公差？ !4<A|$mQ  
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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？？？   E1`_[=8a9  
,H<nNBv3M  
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  :
Ad>@8^  
90% >       0.20977951                 xgM\6e  
80% >       0.22748071                 3O_O5  
50% >       0.38667627                 ]=/?Ooh  
20% >       0.46553746                 m6 Y0,9
 
10% >       0.50064115 g:p`.KuB  
....... hw)z]  

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CP$,fj  
这些数值都是MTF值

Criterion           : Geometric MTF average S&T at 30.0000 cycles per mm   qDfhR`1k  
Mode                : Sensitivities km`";gUp>  
Sampling            : 2 at2)%V)  
Nominal Criterion   : 0.54403234 ]XL=S|tIq  
Test Wavelength     : 0.6328 x8wsx F  
e ]2GAJLI  
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？ ^(BE_<~  
B&EUvY '  
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