[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 |LiFX5!\  
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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 a5]~%xdK  
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图片:2.jpg

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然后运行分析的结果如下： JI@~FD&  
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Analysis of Tolerances D;d'ss;  
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File : E:\光学设计资料\zemax练习\f500.ZMX [sACPn$f  
Title: ~'v^__8  
Date : TUE JUN 21 2011 Xqf"Wx(X  
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Units are Millimeters. 5orA#B  
All changes are computed using linear differences.  2Np9*[C  
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Paraxial Focus compensation only. 3)__b:7J  
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WARNING: Solves should be removed prior to tolerancing. [@Uc4LX  
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Mnemonics: Eu
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TFRN: Tolerance on curvature in fringes. r{p?aG  
TTHI: Tolerance on thickness. ] M_[*OAb  
TSDX: Tolerance on surface decentering in x. B~LB^ n(>@  
TSDY: Tolerance on surface decentering in y. |44CD3A%
 
TSTX: Tolerance on surface tilt in x (degrees). j%~UU0(J  
TSTY: Tolerance on surface tilt in y (degrees). ^Q2K0'm5  
TIRR: Tolerance on irregularity (fringes). 7-6_`Q2}Y  
TIND: Tolerance on Nd index of refraction. @2kt6 W  
TEDX: Tolerance on element decentering in x. {lx^57v  
TEDY: Tolerance on element decentering in y. Ca?pK_Y  
TETX: Tolerance on element tilt in x (degrees). B6OggJ9Iq  
TETY: Tolerance on element tilt in y (degrees). dKZffDTZ  
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WARNING: RAY AIMING IS OFF. Very loose tolerances may not be computed accurately. YC*S;q  
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WARNING: Boundary constraints on compensators will be ignored. l&;#`\s!V  
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Criterion           : Geometric MTF average S&T at 30.0000 cycles per mm AP/tBCeM  
Mode                : Sensitivities 6i=m1Yk  
Sampling            : 2 gLd3,$Ei  
Nominal Criterion   : 0.54403234 _U#ue  
Test Wavelength     : 0.6328 @qg=lt|(F  
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L{<E'#@F  
Fields: XY Symmetric Angle in degrees vV8y_  
#      X-Field      Y-Field       Weight    VDX    VDY    VCX    VCY EQu M|4$ix  
1   0.000E+000   0.000E+000   1.000E+000  0.000  0.000  0.000  0.000 n8R{LjJ2@  
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Sensitivity Analysis: ]5uCs[  
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                 |----------------- Minimum ----------------| |----------------- Maximum ----------------| .VTHZvyn  
Type                      Value      Criterion        Change          Value      Criterion        Change 19;\:tN  
Fringe tolerance on surface 1 B>|@XfPM  
TFRN   1            -1.00000000     0.54257256    -0.00145977     1.00000000     0.54548607     0.00145374 V&)-u(s_S/  
Change in Focus                :      -0.000000                            0.000000 Ql [=  
Fringe tolerance on surface 2 'rq [P",  
TFRN   2            -1.00000000     0.54177471    -0.00225762     1.00000000     0.54627463     0.00224230 J&{E  
Change in Focus                :       0.000000                            0.000000 nJA\P1@m  
Fringe tolerance on surface 3 <7?MutHM-  
TFRN   3            -1.00000000     0.54779866     0.00376632     1.00000000     0.54022572    -0.00380662 k\zNh<^  
Change in Focus                :      -0.000000                            0.000000 9dSKlB5J  
Thickness tolerance on surface 1 Rz*%(2Vz  
TTHI   1   3        -0.20000000     0.54321462    -0.00081772     0.20000000     0.54484759     0.00081525 v3.JG]zLpP  
Change in Focus                :       0.000000                            0.000000 ,#D&*  
Thickness tolerance on surface 2 "mHSbG  
TTHI   2   3        -0.20000000     0.54478712     0.00075478     0.20000000     0.54327558    -0.00075675 =;^2#UxXA&  
Change in Focus                :       0.000000                           -0.000000 .i
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Decenter X tolerance on surfaces 1 through 3 ? 0nbvV5v7  
TEDX   1   3        -0.20000000     0.54401464   -1.7700E-005     0.20000000     0.54401464   -1.7700E-005 (MwB%g  
Change in Focus                :       0.000000                            0.000000 MP0gLi  
Decenter Y tolerance on surfaces 1 through 3 S :9zz  
TEDY   1   3        -0.20000000     0.54401464   -1.7700E-005     0.20000000     0.54401464   -1.7700E-005 f>l}y->-Ug  
Change in Focus                :       0.000000                            0.000000 .* VZY  
Tilt X tolerance on surfaces 1 through 3 (degrees) &7JCPw  
TETX   1   3        -0.20000000     0.54897548     0.00494314     0.20000000     0.54897548     0.00494314 [ V/*{Z  
Change in Focus                :       0.000000                            0.000000 7lf* vqG  
Tilt Y tolerance on surfaces 1 through 3 (degrees) 4K)P Yk  
TETY   1   3        -0.20000000     0.54897548     0.00494314     0.20000000     0.54897548     0.00494314 b^6Ooc/-k  
Change in Focus                :       0.000000                            0.000000 $6BXoh!  
Decenter X tolerance on surface 1 Dgp"RUP  
TSDX   1            -0.20000000     0.53999563    -0.00403671     0.20000000     0.53999563    -0.00403671 wGLZzqgq  
Change in Focus                :       0.000000                            0.000000 v3
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Decenter Y tolerance on surface 1 9M<qk si  
TSDY   1            -0.20000000     0.53999563    -0.00403671     0.20000000     0.53999563    -0.00403671 }3=]1jH6  
Change in Focus                :       0.000000                            0.000000 Ol D]*=.cO  
Tilt X tolerance on surface (degrees) 1 @<AyCaU`.  
TSTX   1            -0.20000000     0.42678383    -0.11724851     0.20000000     0.42678383    -0.11724851 W[w8@OCNf  
Change in Focus                :       0.000000                            0.000000 ^5j9WV  
Tilt Y tolerance on surface (degrees) 1 fZT=q^26  
TSTY   1            -0.20000000     0.42678383    -0.11724851     0.20000000     0.42678383    -0.11724851 F0+u#/#  
Change in Focus                :       0.000000                            0.000000 >$?$&+e}  
Decenter X tolerance on surface 2 fh}\#WE"  
TSDX   2            -0.20000000     0.51705427    -0.02697807     0.20000000     0.51705427    -0.02697807 ?uOdqMJV  
Change in Focus                :       0.000000                            0.000000 ^'6!)y#  
Decenter Y tolerance on surface 2 `NyvJt^<  
TSDY   2            -0.20000000     0.51705427    -0.02697807     0.20000000     0.51705427    -0.02697807 U]d{hY."  
Change in Focus                :       0.000000                            0.000000 rFdq \BSi  
Tilt X tolerance on surface (degrees) 2 #R'm|En'  
TSTX   2            -0.20000000     0.35349910    -0.19053324     0.20000000     0.35349910    -0.19053324 gKn"e|A  
Change in Focus                :       0.000000                            0.000000 [bH6>{3u  
Tilt Y tolerance on surface (degrees) 2 2c_#q1/Z/  
TSTY   2            -0.20000000     0.35349910    -0.19053324     0.20000000     0.35349910    -0.19053324 Ej8EQ%P  
Change in Focus                :       0.000000                            0.000000 %j{gZ
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Decenter X tolerance on surface 3 :W-"UW,  
TSDX   3            -0.20000000     0.53419039    -0.00984195     0.20000000     0.53419039    -0.00984195 I[@}+p0  
Change in Focus                :       0.000000                            0.000000 Abd&p N  
Decenter Y tolerance on surface 3 `=vL?w^QS  
TSDY   3            -0.20000000     0.53419039    -0.00984195     0.20000000     0.53419039    -0.00984195 SA)}---"  
Change in Focus                :       0.000000                            0.000000 _{C:aIl[2  
Tilt X tolerance on surface (degrees) 3 Ql3hq.E  
TSTX   3            -0.20000000     0.42861670    -0.11541563     0.20000000     0.42861670    -0.11541563 Y!Wz7 C  
Change in Focus                :       0.000000                            0.000000 j<Lj1P3  
Tilt Y tolerance on surface (degrees) 3 x.xfMM2n  
TSTY   3            -0.20000000     0.42861670    -0.11541563     0.20000000     0.42861670    -0.11541563 7M=`Z{=9  
Change in Focus                :       0.000000                            0.000000 PIsMx-i0  
Irregularity of surface 1 in fringes : H0+}=  
TIRR   1            -0.20000000     0.50973587    -0.03429647     0.20000000     0.57333868     0.02930634 o!gl :izb  
Change in Focus                :       0.000000                            0.000000 ~4`LOROC  
Irregularity of surface 2 in fringes iRBUX`0  
TIRR   2            -0.20000000     0.53400904    -0.01002330     0.20000000     0.55360281     0.00957047 _U|s!60'  
Change in Focus                :       0.000000                            0.000000 p\WW~qD  
Irregularity of surface 3 in fringes m}'kxZTOm  
TIRR   3            -0.20000000     0.58078982     0.03675748     0.20000000     0.49904394    -0.04498840 %q`_vtUT  
Change in Focus                :       0.000000                            0.000000 RxjC sjg  
Index tolerance on surface 1 @s b\0}  
TIND   1            -0.00100000     0.52606778    -0.01796456     0.00100000     0.56121811     0.01718578 q6%jCt2'  
Change in Focus                :       0.000000                            0.000000 'Oyz/P(p  
Index tolerance on surface 2 cAC]%~orx  
TIND   2            -0.00100000     0.55639086     0.01235852     0.00100000     0.53126361    -0.01276872 k8Qm +r<p  
Change in Focus                :       0.000000                           -0.000000 v\'Eo*4  
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Worst offenders: 9EIHcUXe  
Type                      Value      Criterion        Change &CV%+  
TSTY   2            -0.20000000     0.35349910    -0.19053324 [x kbzJ  
TSTY   2             0.20000000     0.35349910    -0.19053324 :{E;*v_!v  
TSTX   2            -0.20000000     0.35349910    -0.19053324 W}50E.\#  
TSTX   2             0.20000000     0.35349910    -0.19053324 2$V]XSe  
TSTY   1            -0.20000000     0.42678383    -0.11724851 c0sU1:e0  
TSTY   1             0.20000000     0.42678383    -0.11724851 #tRLvOR:  
TSTX   1            -0.20000000     0.42678383    -0.11724851 UpF,e>s  
TSTX   1             0.20000000     0.42678383    -0.11724851  Cdin"  
TSTY   3            -0.20000000     0.42861670    -0.11541563 ]bz']`  
TSTY   3             0.20000000     0.42861670    -0.11541563 1(CpTaa  
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Estimated Performance Changes based upon Root-Sum-Square method: :,h47'0A  
Nominal MTF                 :     0.54403234 l&R~I6^E  
Estimated change            :    -0.36299231 }Dc0 Y  
Estimated MTF               :     0.18104003 +[<|T
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Compensator Statistics: ,edX;`#  
Change in back focus: Uf}s6#  
Minimum            :        -0.000000 xX.fN7[  
Maximum            :         0.000000 |JC/A;ZH  
Mean               :        -0.000000 OlL FuVR  
Standard Deviation :         0.000000 Mj&q"G  
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Monte Carlo Analysis: \DI%/(?  
Number of trials: 20 bS=aFl#  
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Initial Statistics: Normal Distribution ]?whx&+  
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  Trial       Criterion        Change oJE~dY$Q  
      1     0.42804416    -0.11598818 +&6R(7XC  
Change in Focus                :      -0.400171 >`R}ulz)  
      2     0.54384387    -0.00018847 9*pH[vH  
Change in Focus                :       1.018470 o?BcpWp  
      3     0.44510003    -0.09893230 &ejJf{id  
Change in Focus                :      -0.601922 q+<X*yC  
      4     0.18154684    -0.36248550 +F=j1*'&  
Change in Focus                :       0.920681 u/-ul  
      5     0.28665820    -0.25737414 l*V]54|ON3  
Change in Focus                :       1.253875 `irz'/"p  
      6     0.21263372    -0.33139862 a NhI<.v  
Change in Focus                :      -0.903878 xfZ.  
      7     0.40051424    -0.14351809 ByqB4Hv2  
Change in Focus                :      -1.354815 scZdDbL6+  
      8     0.48754161    -0.05649072 | #Z+s-  
Change in Focus                :       0.215922 *{5p/}p  
      9     0.40357468    -0.14045766 b9b384Q1O  
Change in Focus                :       0.281783 kcGs2Y_*&  
     10     0.26315315    -0.28087919 {>$i)B  
Change in Focus                :      -1.048393 =m]|C1x  
     11     0.26120585    -0.28282649 pxy=edd  
Change in Focus                :       1.017611 T
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     12     0.24033815    -0.30369419 //
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Change in Focus                :      -0.109292 E:'TZ
4Z  
     13     0.37164046    -0.17239188 ]Y@Db5S$T  
Change in Focus                :      -0.692430 wq+%O,  
     14     0.48597489    -0.05805744 {/d<Jm:  
Change in Focus                :      -0.662040 sx7;G^93  
     15     0.21462327    -0.32940907 {8`V5:  
Change in Focus                :       1.611296 !ZlBM{C  
     16     0.43378226    -0.11025008 6%?bl{pN
n  
Change in Focus                :      -0.640081 l-4+{6lz  
     17     0.39321881    -0.15081353 H&Jp,<\x  
Change in Focus                :       0.914906 GxjmHo  
     18     0.20692530    -0.33710703 ?XO
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Change in Focus                :       0.801607 4B?8$&b  
     19     0.51374068    -0.03029165 @)nxX))a  
Change in Focus                :       0.947293 bWU4lPfP  
     20     0.38013374    -0.16389860 r: Ij\YQ  
Change in Focus                :       0.667010 O_-Lm4g?4  
{6}H}_(]  
Number of traceable Monte Carlo files generated: 20 P|c[EUT  
B q/<kEgM  
Nominal     0.54403234 E$!0h_.(  
Best        0.54384387    Trial     2 od\-o:bS  
Worst       0.18154684    Trial     4 W:s`;8iM$  
Mean        0.35770970 :K J#_y\rt  
Std Dev     0.11156454 y*ux7KO  
6jS:_[p  
/~=W3lhY  
Compensator Statistics: @q8
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Change in back focus: bp"@vlv  
Minimum            :        -1.354815 Z|l/6L8  
Maximum            :         1.611296 e0rh~@E  
Mean               :         0.161872 _4~'K?  
Standard Deviation :         0.869664 =Rv!c+?  
/XEt2,sI9  
90% >       0.20977951               ?4QX;s7  
80% >       0.22748071               FZdZGK  
50% >       0.38667627               R1A|g=kF  
20% >       0.46553746               uUy~
$>V  
10% >       0.50064115                Ky:y1\K1^K  
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End of Run. YC,s]~[[  
6d%V=1^F  
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 Xx)PyO  

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 T-.Q  
.eZsKc-@  
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                 @)^|U"  
80% >       0.22748071                 <F%c"Rkh  
50% >       0.38667627                 |mS-<e8LY4  
20% >       0.46553746                 `<oNEr+#  
10% >       0.50064115 AuW-XK.  
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最后这个数值是MTF值呢，还是MTF的公差？ &;x*uG  
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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？？？   8mh@C6U  
q4xP<b^  
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  : !S}d?8I6  
90% >       0.20977951                 :\cid]y3  
80% >       0.22748071                 Lz:Q6  
50% >       0.38667627                 9?Q0O\&uP  
20% >       0.46553746                 -Crm#Ib~  
10% >       0.50064115 Cb i;CF\{  
....... i~i ?M)  

pp1kcrE\M  
K]H [A,  
这些数值都是MTF值

Criterion           : Geometric MTF average S&T at 30.0000 cycles per mm   `-yiVUp1:z  
Mode                : Sensitivities T_I ApC  
Sampling            : 2 5XF&yYWq  
Nominal Criterion   : 0.54403234 ?O.'_YS  
Test Wavelength     : 0.6328 >)8<d3m  
w1:%P36H  
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？ ?,oE_H  
K'zBDrkW-x  
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