[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 1*jm9])#  
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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 e)"cm;BJ^P  
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图片:2.jpg

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然后运行分析的结果如下： /WVMT]T6^,  
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Analysis of Tolerances 'WCTjTob/  
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File : E:\光学设计资料\zemax练习\f500.ZMX vq:j?7  
Title: j(JI$  
Date : TUE JUN 21 2011 C\D4C]/8  
I5?LD=tt  
Units are Millimeters. (5&"Y?#o,  
All changes are computed using linear differences. LL+rdxJO^  
-wRzMT19MG  
Paraxial Focus compensation only. DlI|~  
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WARNING: Solves should be removed prior to tolerancing. IR
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l !v#6#iq  
Mnemonics: _Tz!~z  
TFRN: Tolerance on curvature in fringes. #
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TTHI: Tolerance on thickness. kq-RM#Dj:  
TSDX: Tolerance on surface decentering in x. h+@t8Q;gGw  
TSDY: Tolerance on surface decentering in y. BW 7[JD  
TSTX: Tolerance on surface tilt in x (degrees). rfoCYsX'  
TSTY: Tolerance on surface tilt in y (degrees). g*M3;G  
TIRR: Tolerance on irregularity (fringes). ;@hP*7Lm  
TIND: Tolerance on Nd index of refraction. $h9!"f[|j  
TEDX: Tolerance on element decentering in x. owhht98y(  
TEDY: Tolerance on element decentering in y. $49tV?q5
 
TETX: Tolerance on element tilt in x (degrees). [^f`D%8o  
TETY: Tolerance on element tilt in y (degrees). r%i{a  
1S:H!h3  
WARNING: RAY AIMING IS OFF. Very loose tolerances may not be computed accurately. `( Gk_VAa  
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WARNING: Boundary constraints on compensators will be ignored. ,P+&-}gn9  
f?6=H^_>  
Criterion           : Geometric MTF average S&T at 30.0000 cycles per mm tEj5WEnNE8  
Mode                : Sensitivities A )cb
 
Sampling            : 2 w?q"%F;/  
Nominal Criterion   : 0.54403234 <0m;|Ai'W  
Test Wavelength     : 0.6328 oL;/Qan  
@gOgs  
{ L5m`-x  
Fields: XY Symmetric Angle in degrees 76/%Py|  
#      X-Field      Y-Field       Weight    VDX    VDY    VCX    VCY e|P60cd /  
1   0.000E+000   0.000E+000   1.000E+000  0.000  0.000  0.000  0.000 PdZSXP4;k  
L z  
Sensitivity Analysis: tG-MC&;=  
JiR|+6"7  
                 |----------------- Minimum ----------------| |----------------- Maximum ----------------| 1Rh&04O>VL  
Type                      Value      Criterion        Change          Value      Criterion        Change ",m5}mk:4  
Fringe tolerance on surface 1 ghl9gFFj  
TFRN   1            -1.00000000     0.54257256    -0.00145977     1.00000000     0.54548607     0.00145374 LmE-&  
Change in Focus                :      -0.000000                            0.000000 sBwgl9  
Fringe tolerance on surface 2 nj  
TFRN   2            -1.00000000     0.54177471    -0.00225762     1.00000000     0.54627463     0.00224230 D[mYrWHpn  
Change in Focus                :       0.000000                            0.000000 m[f\I^\%8  
Fringe tolerance on surface 3 |Th{*IJ<,  
TFRN   3            -1.00000000     0.54779866     0.00376632     1.00000000     0.54022572    -0.00380662 Lnzhs;7L  
Change in Focus                :      -0.000000                            0.000000  a4yU[KK  
Thickness tolerance on surface 1 *QX$Mo^E  
TTHI   1   3        -0.20000000     0.54321462    -0.00081772     0.20000000     0.54484759     0.00081525 ?0x;L/d])  
Change in Focus                :       0.000000                            0.000000 YS*t
7  
Thickness tolerance on surface 2 I}X8-WFB  
TTHI   2   3        -0.20000000     0.54478712     0.00075478     0.20000000     0.54327558    -0.00075675 wHmEt ORo  
Change in Focus                :       0.000000                           -0.000000 @h]H_  
Decenter X tolerance on surfaces 1 through 3 h| Ih4  
TEDX   1   3        -0.20000000     0.54401464   -1.7700E-005     0.20000000     0.54401464   -1.7700E-005 C1J'. !  
Change in Focus                :       0.000000                            0.000000 sIpK@BQ'  
Decenter Y tolerance on surfaces 1 through 3 RjT[y: !  
TEDY   1   3        -0.20000000     0.54401464   -1.7700E-005     0.20000000     0.54401464   -1.7700E-005 sXWMXQ3  
Change in Focus                :       0.000000                            0.000000 C6`8dn   
Tilt X tolerance on surfaces 1 through 3 (degrees) "'Q:%_;  
TETX   1   3        -0.20000000     0.54897548     0.00494314     0.20000000     0.54897548     0.00494314 f
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Change in Focus                :       0.000000                            0.000000 z!%}0  
Tilt Y tolerance on surfaces 1 through 3 (degrees) rZEu@6
3  
TETY   1   3        -0.20000000     0.54897548     0.00494314     0.20000000     0.54897548     0.00494314 ]%."  
Change in Focus                :       0.000000                            0.000000  x^"OH  
Decenter X tolerance on surface 1 e/6oC~#]  
TSDX   1            -0.20000000     0.53999563    -0.00403671     0.20000000     0.53999563    -0.00403671 LM}si|  
Change in Focus                :       0.000000                            0.000000 0czy:d,M%  
Decenter Y tolerance on surface 1 h4/rw fp^  
TSDY   1            -0.20000000     0.53999563    -0.00403671     0.20000000     0.53999563    -0.00403671 d={}a,3?  
Change in Focus                :       0.000000                            0.000000 Z+?j8(:n  
Tilt X tolerance on surface (degrees) 1 4ZIXG,@mZJ  
TSTX   1            -0.20000000     0.42678383    -0.11724851     0.20000000     0.42678383    -0.11724851 ,RZktWW_  
Change in Focus                :       0.000000                            0.000000 S(Pal/-"  
Tilt Y tolerance on surface (degrees) 1 tua+R_"  
TSTY   1            -0.20000000     0.42678383    -0.11724851     0.20000000     0.42678383    -0.11724851 {9)f~EbM!  
Change in Focus                :       0.000000                            0.000000 xiI!_0'  
Decenter X tolerance on surface 2 jHd~yCq  
TSDX   2            -0.20000000     0.51705427    -0.02697807     0.20000000     0.51705427    -0.02697807 G`pI{_-e  
Change in Focus                :       0.000000                            0.000000 (n<xoV[e  
Decenter Y tolerance on surface 2 w*+rBp,f  
TSDY   2            -0.20000000     0.51705427    -0.02697807     0.20000000     0.51705427    -0.02697807 [#_ceg1G  
Change in Focus                :       0.000000                            0.000000 0V^?~ex  
Tilt X tolerance on surface (degrees) 2 1#'wR3[+  
TSTX   2            -0.20000000     0.35349910    -0.19053324     0.20000000     0.35349910    -0.19053324 g%Z;rDfi  
Change in Focus                :       0.000000                            0.000000 &"BKue~q@p  
Tilt Y tolerance on surface (degrees) 2 G*QQpSp  
TSTY   2            -0.20000000     0.35349910    -0.19053324     0.20000000     0.35349910    -0.19053324 Na=q(OKN  
Change in Focus                :       0.000000                            0.000000 qRUz;M4  
Decenter X tolerance on surface 3 %63<Iz"  
TSDX   3            -0.20000000     0.53419039    -0.00984195     0.20000000     0.53419039    -0.00984195 9u9#&xx  
Change in Focus                :       0.000000                            0.000000 CB~&!MdMr  
Decenter Y tolerance on surface 3 f /jN$p  
TSDY   3            -0.20000000     0.53419039    -0.00984195     0.20000000     0.53419039    -0.00984195 hi37p1t   
Change in Focus                :       0.000000                            0.000000 0iYe>u  
Tilt X tolerance on surface (degrees) 3 K46\Rm_:B;  
TSTX   3            -0.20000000     0.42861670    -0.11541563     0.20000000     0.42861670    -0.11541563 sB6UlX;b:  
Change in Focus                :       0.000000                            0.000000 GB-=DC6  
Tilt Y tolerance on surface (degrees) 3 a^2?W
 
TSTY   3            -0.20000000     0.42861670    -0.11541563     0.20000000     0.42861670    -0.11541563 <Z vG&  
Change in Focus                :       0.000000                            0.000000 )b =$!  
Irregularity of surface 1 in fringes e0D;]  
TIRR   1            -0.20000000     0.50973587    -0.03429647     0.20000000     0.57333868     0.02930634 {PfE7KH  
Change in Focus                :       0.000000                            0.000000 ?.T=(-  
Irregularity of surface 2 in fringes =$HzEzrw  
TIRR   2            -0.20000000     0.53400904    -0.01002330     0.20000000     0.55360281     0.00957047 &t4j px  
Change in Focus                :       0.000000                            0.000000 xTe?*  
Irregularity of surface 3 in fringes p5*i d5
 
TIRR   3            -0.20000000     0.58078982     0.03675748     0.20000000     0.49904394    -0.04498840 P6X 4m(t  
Change in Focus                :       0.000000                            0.000000 '\9A78NV{;  
Index tolerance on surface 1 43/|[  
TIND   1            -0.00100000     0.52606778    -0.01796456     0.00100000     0.56121811     0.01718578 Jzr(A^vwo  
Change in Focus                :       0.000000                            0.000000 c!I> _PD`&  
Index tolerance on surface 2 W4Eo1 E  
TIND   2            -0.00100000     0.55639086     0.01235852     0.00100000     0.53126361    -0.01276872 _h5@3>b3r  
Change in Focus                :       0.000000                           -0.000000 Abj`0\  
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Worst offenders: !D1F4v[c=  
Type                      Value      Criterion        Change hX;xbl  
TSTY   2            -0.20000000     0.35349910    -0.19053324 4b4nFRnH  
TSTY   2             0.20000000     0.35349910    -0.19053324 ZJ!/49c*>  
TSTX   2            -0.20000000     0.35349910    -0.19053324 GE"#.J4z  
TSTX   2             0.20000000     0.35349910    -0.19053324 Q i
?   
TSTY   1            -0.20000000     0.42678383    -0.11724851 8(BLS{-"<  
TSTY   1             0.20000000     0.42678383    -0.11724851 1{DHlyA6g  
TSTX   1            -0.20000000     0.42678383    -0.11724851 vHao y  
TSTX   1             0.20000000     0.42678383    -0.11724851 N^)L@6  
TSTY   3            -0.20000000     0.42861670    -0.11541563 
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TSTY   3             0.20000000     0.42861670    -0.11541563 9m<>G3Jr  
M'*
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Estimated Performance Changes based upon Root-Sum-Square method: JL]6o8x  
Nominal MTF                 :     0.54403234 &359tG0@P  
Estimated change            :    -0.36299231 C[~b6UP  
Estimated MTF               :     0.18104003 W$,c]/u|  
pO"V9[p]  
Compensator Statistics: ?+51 B-  
Change in back focus: p#3P`I>ZrT  
Minimum            :        -0.000000 1(C%/g#"  
Maximum            :         0.000000 O10h(Wg  
Mean               :        -0.000000 Xmtq~
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Standard Deviation :         0.000000 Y(<>[8S m  
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Monte Carlo Analysis: Y,?rykRj  
Number of trials: 20 @v|_APy#  
[Q)lJTs  
Initial Statistics: Normal Distribution `57ffQR9  
GCc@ :*4[  
  Trial       Criterion        Change QarA.Ne~  
      1     0.42804416    -0.11598818 "Sl";.  
Change in Focus                :      -0.400171 3q<\ \8Y*  
      2     0.54384387    -0.00018847 #Jg)HU9  
Change in Focus                :       1.018470 6N6d[t"  
      3     0.44510003    -0.09893230 yay{lP}b"  
Change in Focus                :      -0.601922 j5tA!o  
      4     0.18154684    -0.36248550 2E;*kKw[  
Change in Focus                :       0.920681 AOeptv^k3}  
      5     0.28665820    -0.25737414 7j{SCE;  
Change in Focus                :       1.253875 oc>,5 x  
      6     0.21263372    -0.33139862 <0pBu7a  
Change in Focus                :      -0.903878 WFy90*@Z  
      7     0.40051424    -0.14351809 5^[V%4y>  
Change in Focus                :      -1.354815 y~;Kf0~  
      8     0.48754161    -0.05649072 Q-(twh  
Change in Focus                :       0.215922 /O+,vRw\A  
      9     0.40357468    -0.14045766 ,D>$N3;  
Change in Focus                :       0.281783 Hb IRE  
     10     0.26315315    -0.28087919 7 zK%CJ  
Change in Focus                :      -1.048393 Q+gQ"l,95  
     11     0.26120585    -0.28282649 'Aai.PE:  
Change in Focus                :       1.017611 d:Wh0y}  
     12     0.24033815    -0.30369419 f0}+8JW5h  
Change in Focus                :      -0.109292 <
[kdF")  
     13     0.37164046    -0.17239188 Fb VtyQz  
Change in Focus                :      -0.692430 aw {?UvL&  
     14     0.48597489    -0.05805744 z1_\P) M  
Change in Focus                :      -0.662040 $!ka8) ~  
     15     0.21462327    -0.32940907
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Change in Focus                :       1.611296 KE6[u*\  
     16     0.43378226    -0.11025008 C%0|o/Wi  
Change in Focus                :      -0.640081 A)&OR]0[  
     17     0.39321881    -0.15081353 Tw);`&Ulo  
Change in Focus                :       0.914906 9psD"=/"  
     18     0.20692530    -0.33710703 x-mRPH  
Change in Focus                :       0.801607 g#T8WX{(V  
     19     0.51374068    -0.03029165 zuwCN.  
Change in Focus                :       0.947293 C]p3,G,oN  
     20     0.38013374    -0.16389860 +h
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Change in Focus                :       0.667010 rx CSs  
rhsSV3iM  
Number of traceable Monte Carlo files generated: 20 bncIxxe  
?,O{,2}  
Nominal     0.54403234 k7W7S`H  
Best        0.54384387    Trial     2 &U*=D8!0  
Worst       0.18154684    Trial     4 3u3(BY{"\F  
Mean        0.35770970 he;&KzEu  
Std Dev     0.11156454 /9QI^6&SX  
Z>{3t/`  
=i4Ds  
Compensator Statistics: %70sS].@  
Change in back focus: A90oX1l  
Minimum            :        -1.354815 eI/9uR%  
Maximum            :         1.611296 &+u) +<&;(  
Mean               :         0.161872 hqmKUlo  
Standard Deviation :         0.869664 ~8o's`  
SoI"a^fY  
90% >       0.20977951               TG~:Cmc  
80% >       0.22748071               @YHB>rNf(7  
50% >       0.38667627               c~K^ooS-  
20% >       0.46553746               gT22!  
10% >       0.50064115                +'Ec)7m  
06|+_  
End of Run. a2 e-Q({  
)4vZIU#  
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 y+hC !-  

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 y2bL!Y<s9  
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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                 # Y/.%ch.  
80% >       0.22748071                 &rj3UF@hb  
50% >       0.38667627                 ;O5p>o  
20% >       0.46553746                 ">PpC]Y1  
10% >       0.50064115 Nn5z   
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最后这个数值是MTF值呢，还是MTF的公差？ P{v>o,a.  
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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？？？   28J ;9  
<8nl}^d5  
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  : ie4keVlXc  
90% >       0.20977951                 )X*?M?~\  
80% >       0.22748071                 R Fgy  
50% >       0.38667627                 WmU5YZ(mAq  
20% >       0.46553746                 VxD_:USIF  
10% >       0.50064115 Da_8Q(XFe  
....... yh9fHN)F  

p<>xq
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ke.{wh\0  
这些数值都是MTF值

Criterion           : Geometric MTF average S&T at 30.0000 cycles per mm   $Pa7B]A,Ae  
Mode                : Sensitivities VAkZ@ u3'~  
Sampling            : 2 3$Ecq|4J:  
Nominal Criterion   : 0.54403234 >r Nff!Ow
 
Test Wavelength     : 0.6328 vfID@g`!q+  
[hy:BV6H+  
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？ ]W,K}~!
 
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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