[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 kukaim>K  
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然后添加了默认公差分析，基本没变 p#M!S2&z  
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然后运行分析的结果如下： n1)'cS5}  
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Analysis of Tolerances T{~MiC6A  
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File : E:\光学设计资料\zemax练习\f500.ZMX o*)@oU  
Title: 
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Date : TUE JUN 21 2011 Ty}R^cy{d  
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Units are Millimeters. dMgbW<uAu  
All changes are computed using linear differences. J=L`]XE  
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Paraxial Focus compensation only. feg`(R2  
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WARNING: Solves should be removed prior to tolerancing. Hf.xd.Yw  
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Mnemonics: G,/Gq+WX  
TFRN: Tolerance on curvature in fringes. eHROBxH&  
TTHI: Tolerance on thickness. D
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TSDX: Tolerance on surface decentering in x. }1\?()rB  
TSDY: Tolerance on surface decentering in y. a}GAB@YI  
TSTX: Tolerance on surface tilt in x (degrees). Ebbe=4  
TSTY: Tolerance on surface tilt in y (degrees). DoTs9w|5  
TIRR: Tolerance on irregularity (fringes). UR\ZN@O  
TIND: Tolerance on Nd index of refraction. ,@,LD  u  
TEDX: Tolerance on element decentering in x. z.A4x#>-  
TEDY: Tolerance on element decentering in y. K5+!(5V~  
TETX: Tolerance on element tilt in x (degrees). 8ipW3~-4  
TETY: Tolerance on element tilt in y (degrees). ?P
YNE  
0.(zTJ  
WARNING: RAY AIMING IS OFF. Very loose tolerances may not be computed accurately. "j +v,js  
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WARNING: Boundary constraints on compensators will be ignored. e)br`CD%  
7~lB}$L  
Criterion           : Geometric MTF average S&T at 30.0000 cycles per mm v6KL93  
Mode                : Sensitivities 0 c,bet{m  
Sampling            : 2 s/\XH&KR3V  
Nominal Criterion   : 0.54403234 MXh^dOWR  
Test Wavelength     : 0.6328 /;b.-
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)e#fj+>x)  
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Fields: XY Symmetric Angle in degrees _4~k3%w\`l  
#      X-Field      Y-Field       Weight    VDX    VDY    VCX    VCY H.)fOctbO  
1   0.000E+000   0.000E+000   1.000E+000  0.000  0.000  0.000  0.000 a'm!M:w  
i~(#S8U4d  
Sensitivity Analysis: UVnrDhd!0  
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                 |----------------- Minimum ----------------| |----------------- Maximum ----------------| # e$\~cPd  
Type                      Value      Criterion        Change          Value      Criterion        Change |@OJ~5H/{  
Fringe tolerance on surface 1 s%FP6u7[i  
TFRN   1            -1.00000000     0.54257256    -0.00145977     1.00000000     0.54548607     0.00145374 Lq3(Z%  
Change in Focus                :      -0.000000                            0.000000
\8 g.  
Fringe tolerance on surface 2 x ru(Le}E  
TFRN   2            -1.00000000     0.54177471    -0.00225762     1.00000000     0.54627463     0.00224230 |F3vRt@  
Change in Focus                :       0.000000                            0.000000 'wegipK~R  
Fringe tolerance on surface 3 uFMs^^#  
TFRN   3            -1.00000000     0.54779866     0.00376632     1.00000000     0.54022572    -0.00380662 f*UBigk  
Change in Focus                :      -0.000000                            0.000000 4b]IazL)  
Thickness tolerance on surface 1 ,&-S?|  
TTHI   1   3        -0.20000000     0.54321462    -0.00081772     0.20000000     0.54484759     0.00081525 jg7d7{{SB  
Change in Focus                :       0.000000                            0.000000
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Thickness tolerance on surface 2 ]cS&8{ ^2  
TTHI   2   3        -0.20000000     0.54478712     0.00075478     0.20000000     0.54327558    -0.00075675 .Y+mwvLpRG  
Change in Focus                :       0.000000                           -0.000000 _QD/!~O  
Decenter X tolerance on surfaces 1 through 3 7^`RP e^a+  
TEDX   1   3        -0.20000000     0.54401464   -1.7700E-005     0.20000000     0.54401464   -1.7700E-005 ;CLR{t(N#V  
Change in Focus                :       0.000000                            0.000000 &f$a1#O}dx  
Decenter Y tolerance on surfaces 1 through 3 J!ln=h  
TEDY   1   3        -0.20000000     0.54401464   -1.7700E-005     0.20000000     0.54401464   -1.7700E-005 7 _X&5ni  
Change in Focus                :       0.000000                            0.000000 1{= E?  
Tilt X tolerance on surfaces 1 through 3 (degrees) ?<-wHj)  
TETX   1   3        -0.20000000     0.54897548     0.00494314     0.20000000     0.54897548     0.00494314 zUvB0\{q  
Change in Focus                :       0.000000                            0.000000 &8R-C[A  
Tilt Y tolerance on surfaces 1 through 3 (degrees) _a?wf!4>P  
TETY   1   3        -0.20000000     0.54897548     0.00494314     0.20000000     0.54897548     0.00494314 hQ\#Fhu7  
Change in Focus                :       0.000000                            0.000000 2pVVoZV.<  
Decenter X tolerance on surface 1 9)8*FahW  
TSDX   1            -0.20000000     0.53999563    -0.00403671     0.20000000     0.53999563    -0.00403671 "4J?JR
 
Change in Focus                :       0.000000                            0.000000  gvvFU,2  
Decenter Y tolerance on surface 1 4da^d9ZOy  
TSDY   1            -0.20000000     0.53999563    -0.00403671     0.20000000     0.53999563    -0.00403671 g-4gI\  
Change in Focus                :       0.000000                            0.000000 Fm
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Tilt X tolerance on surface (degrees) 1 ?*B;514  
TSTX   1            -0.20000000     0.42678383    -0.11724851     0.20000000     0.42678383    -0.11724851 $%lHj+(  
Change in Focus                :       0.000000                            0.000000 *g}vT8w'}  
Tilt Y tolerance on surface (degrees) 1 zS&7[:IRs'  
TSTY   1            -0.20000000     0.42678383    -0.11724851     0.20000000     0.42678383    -0.11724851 ju @%A@s  
Change in Focus                :       0.000000                            0.000000 E&}H\zt#  
Decenter X tolerance on surface 2 !NlB%
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TSDX   2            -0.20000000     0.51705427    -0.02697807     0.20000000     0.51705427    -0.02697807 {"qW~S90YO  
Change in Focus                :       0.000000                            0.000000 R4hav  
Decenter Y tolerance on surface 2 >$d d9|[  
TSDY   2            -0.20000000     0.51705427    -0.02697807     0.20000000     0.51705427    -0.02697807 q8&4=eV\A  
Change in Focus                :       0.000000                            0.000000 D/+@d:-G  
Tilt X tolerance on surface (degrees) 2 Z&2 &wD  
TSTX   2            -0.20000000     0.35349910    -0.19053324     0.20000000     0.35349910    -0.19053324 Yj|c+&Ng  
Change in Focus                :       0.000000                            0.000000 C.DoXE7  
Tilt Y tolerance on surface (degrees) 2 ]9!Gg  
TSTY   2            -0.20000000     0.35349910    -0.19053324     0.20000000     0.35349910    -0.19053324 bQ${8ZO  
Change in Focus                :       0.000000                            0.000000 WV9[DFU  
Decenter X tolerance on surface 3 N^nDWK  
TSDX   3            -0.20000000     0.53419039    -0.00984195     0.20000000     0.53419039    -0.00984195 s (l+{b &  
Change in Focus                :       0.000000                            0.000000 [346w <  
Decenter Y tolerance on surface 3 zIX}[l4EW~  
TSDY   3            -0.20000000     0.53419039    -0.00984195     0.20000000     0.53419039    -0.00984195 ?j},O=JFn  
Change in Focus                :       0.000000                            0.000000 Y9lbf_51  
Tilt X tolerance on surface (degrees) 3 6|>"0[4S  
TSTX   3            -0.20000000     0.42861670    -0.11541563     0.20000000     0.42861670    -0.11541563 K6PC&+x  
Change in Focus                :       0.000000                            0.000000 d#M?lS>  
Tilt Y tolerance on surface (degrees) 3 D*<8e?F  
TSTY   3            -0.20000000     0.42861670    -0.11541563     0.20000000     0.42861670    -0.11541563 rzc 3k~@  
Change in Focus                :       0.000000                            0.000000 2/a04qA#  
Irregularity of surface 1 in fringes URj% J/jD  
TIRR   1            -0.20000000     0.50973587    -0.03429647     0.20000000     0.57333868     0.02930634 #UP,;W  
Change in Focus                :       0.000000                            0.000000 4cv|ok8P  
Irregularity of surface 2 in fringes z^SN#v$  
TIRR   2            -0.20000000     0.53400904    -0.01002330     0.20000000     0.55360281     0.00957047 DU*Hnii  
Change in Focus                :       0.000000                            0.000000 tPMgZ  
Irregularity of surface 3 in fringes r(`8A:#d  
TIRR   3            -0.20000000     0.58078982     0.03675748     0.20000000     0.49904394    -0.04498840 }K qw\]`  
Change in Focus                :       0.000000                            0.000000 .1l[
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Index tolerance on surface 1 *o2_EqXL*  
TIND   1            -0.00100000     0.52606778    -0.01796456     0.00100000     0.56121811     0.01718578 kG~ivB}x  
Change in Focus                :       0.000000                            0.000000 bN<
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Index tolerance on surface 2 n^I|}u\  
TIND   2            -0.00100000     0.55639086     0.01235852     0.00100000     0.53126361    -0.01276872 ZFd{q)qe   
Change in Focus                :       0.000000                           -0.000000 *1;L,*J"|  
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Worst offenders: QvyUd%e'5A  
Type                      Value      Criterion        Change g*\v}6 h  
TSTY   2            -0.20000000     0.35349910    -0.19053324 ).@)t:uNa  
TSTY   2             0.20000000     0.35349910    -0.19053324 +LU).  
TSTX   2            -0.20000000     0.35349910    -0.19053324 07E".T%Ts  
TSTX   2             0.20000000     0.35349910    -0.19053324 iI/'!85  
TSTY   1            -0.20000000     0.42678383    -0.11724851 j2C^1:s@m  
TSTY   1             0.20000000     0.42678383    -0.11724851 `cy"-CJS  
TSTX   1            -0.20000000     0.42678383    -0.11724851 ,m_&eF  
TSTX   1             0.20000000     0.42678383    -0.11724851 '~!l(&X  
TSTY   3            -0.20000000     0.42861670    -0.11541563 Qr xO erp  
TSTY   3             0.20000000     0.42861670    -0.11541563 p%i .(A  
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Estimated Performance Changes based upon Root-Sum-Square method: r>D[5B  
Nominal MTF                 :     0.54403234 v6, o/3Ex  
Estimated change            :    -0.36299231 vb4G_X0S  
Estimated MTF               :     0.18104003 4$#ia F  
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Compensator Statistics: M4$4D?  
Change in back focus: 34&$_0zn  
Minimum            :        -0.000000 A?<"^<A^  
Maximum            :         0.000000 w{UKoU  
Mean               :        -0.000000 H#d! `  
Standard Deviation :         0.000000 >G-?e!  
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Monte Carlo Analysis: l.LFlwt  
Number of trials: 20 }F9?*2\/  
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Initial Statistics: Normal Distribution Fb`7aFIf  
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  Trial       Criterion        Change d+wNGN  
      1     0.42804416    -0.11598818 *1 eTf  
Change in Focus                :      -0.400171 h;h,dx  
      2     0.54384387    -0.00018847 PT5ni6  
Change in Focus                :       1.018470 (]# JpQ  
      3     0.44510003    -0.09893230 9\;/-0P  
Change in Focus                :      -0.601922 GA*Khqdid  
      4     0.18154684    -0.36248550 */@bNT9BgO  
Change in Focus                :       0.920681 K,T]Fuy  
      5     0.28665820    -0.25737414 d3q/mg5a  
Change in Focus                :       1.253875 &J
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      6     0.21263372    -0.33139862 Q
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Change in Focus                :      -0.903878 ;|e 0{Jrz  
      7     0.40051424    -0.14351809 mf_9O  
Change in Focus                :      -1.354815 )6S}O* 1  
      8     0.48754161    -0.05649072 h4xf%vA(;  
Change in Focus                :       0.215922 mJ#B<I'  
      9     0.40357468    -0.14045766 ;`Ch2b1+  
Change in Focus                :       0.281783 0}3'h#33=  
     10     0.26315315    -0.28087919 ~$`YzK^*X  
Change in Focus                :      -1.048393 V,%5 hl'&  
     11     0.26120585    -0.28282649 {?M*ZRO'  
Change in Focus                :       1.017611 Hw-oh?=  
     12     0.24033815    -0.30369419 k*+ZLrT  
Change in Focus                :      -0.109292 o+WrIAR  
     13     0.37164046    -0.17239188 KPvYq?F>4  
Change in Focus                :      -0.692430 i /U{dzZ  
     14     0.48597489    -0.05805744 BN>$LL  
Change in Focus                :      -0.662040 C=f(NpyD6  
     15     0.21462327    -0.32940907 MnsWB[  
Change in Focus                :       1.611296 61;5Yo  
     16     0.43378226    -0.11025008 `e69kBAm  
Change in Focus                :      -0.640081 ;eSf4_~  
     17     0.39321881    -0.15081353 D&lXi~Z%.  
Change in Focus                :       0.914906 rMFf8D(Y  
     18     0.20692530    -0.33710703 9w<_XXQ  
Change in Focus                :       0.801607 GHrT?zEX  
     19     0.51374068    -0.03029165 .0/Z'.c8  
Change in Focus                :       0.947293 \.-y LS.  
     20     0.38013374    -0.16389860 YQd&rkr  
Change in Focus                :       0.667010 -2~yc2:>A  
Xg)FIaw]eT  
Number of traceable Monte Carlo files generated: 20 ,>EY9j  
@(5RAYRV  
Nominal     0.54403234 p%qL0   
Best        0.54384387    Trial     2 !ZcALtq  
Worst       0.18154684    Trial     4 ju6_L<  
Mean        0.35770970  x a,LV  
Std Dev     0.11156454 %R5MAs&-5  
R$3+ 01j|  
|
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VFF  
Compensator Statistics: F4l6PGxF&\  
Change in back focus: \O4=
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Minimum            :        -1.354815 yodrX&"  
Maximum            :         1.611296 545xs`Q_  
Mean               :         0.161872 `SbX`a0p2  
Standard Deviation :         0.869664 *qOCo_=P8  
n8ya$bc  
90% >       0.20977951               yc}t(*A5  
80% >       0.22748071               <qiap2  
50% >       0.38667627               h^X.e[  
20% >       0.46553746               s'w0pZqj  
10% >       0.50064115                Wm/k(R`O<  
7im;b15j`'  
End of Run. C#c
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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 cHd39H9  
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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 yXmp]9$  
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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                 B&D z(Bs  
80% >       0.22748071                 wtyu"=  
50% >       0.38667627                 W1(ziP'6  
20% >       0.46553746                 vZsVxx99  
10% >       0.50064115 E$ rSrT(  
06 1=pV$CJ  
最后这个数值是MTF值呢，还是MTF的公差？ %m`QnRX?D  
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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？？？   $4]PN2d&  
GC2<K  
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  : _wMz+<7bY  
90% >       0.20977951                 Jx]`!dP3  
80% >       0.22748071                 o9CB ,c7]  
50% >       0.38667627                 `Cc<K8s8  
20% >       0.46553746                 -9mh|&z`  
10% >       0.50064115 Y`wi=(  
....... e=U7w7(s9
 

<Ip}uy[Y  
YL]x>7T~4t  
这些数值都是MTF值

Criterion           : Geometric MTF average S&T at 30.0000 cycles per mm   "(5M }5D  
Mode                : Sensitivities yR&E6o.$z  
Sampling            : 2 ^J327  
Nominal Criterion   : 0.54403234 BkcOsJIz  
Test Wavelength     : 0.6328 U;_;_  
B}vI<?c  
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？ *@yYqI<1a  
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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