[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 % < D  
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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}sjl  
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图片:2.jpg

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然后运行分析的结果如下： Z;M]^?  
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Analysis of Tolerances ]
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File : E:\光学设计资料\zemax练习\f500.ZMX 4vq,W_n.hQ  
Title: s,XKl5'+8e  
Date : TUE JUN 21 2011 -} \g[|  
w-*$gk]  
Units are Millimeters. >H?l[*9  
All changes are computed using linear differences. Sh(  
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Paraxial Focus compensation only. ;|Idg"2  
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WARNING: Solves should be removed prior to tolerancing. S'#KPzy.  
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Mnemonics: &;S.1tg  
TFRN: Tolerance on curvature in fringes. xZZW*d_b  
TTHI: Tolerance on thickness. N>!RKf:ir  
TSDX: Tolerance on surface decentering in x. >MZWm6M8  
TSDY: Tolerance on surface decentering in y. teH $hd-q  
TSTX: Tolerance on surface tilt in x (degrees). s1.YH?A;  
TSTY: Tolerance on surface tilt in y (degrees). 0i/l2&x*k]  
TIRR: Tolerance on irregularity (fringes). iD+Q\l;%  
TIND: Tolerance on Nd index of refraction. ]`)50\pdw  
TEDX: Tolerance on element decentering in x. m,NUNd#)\  
TEDY: Tolerance on element decentering in y. (dn(:<_$  
TETX: Tolerance on element tilt in x (degrees). 5 fY\0  
TETY: Tolerance on element tilt in y (degrees). W8+Daw1Nr  
=$;i  
WARNING: RAY AIMING IS OFF. Very loose tolerances may not be computed accurately. W}
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WARNING: Boundary constraints on compensators will be ignored. :bFCnV`Q  
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Criterion           : Geometric MTF average S&T at 30.0000 cycles per mm )/kkvI()l  
Mode                : Sensitivities i lk\&J~I  
Sampling            : 2 awLN>KI]</  
Nominal Criterion   : 0.54403234 a]XQM$T$  
Test Wavelength     : 0.6328 tn!z^W  
@9~a3k|  
rM<|<6(L  
Fields: XY Symmetric Angle in degrees P6V_cw$  
#      X-Field      Y-Field       Weight    VDX    VDY    VCX    VCY rZ5vey  
1   0.000E+000   0.000E+000   1.000E+000  0.000  0.000  0.000  0.000 o5?f]Uq5 ,  
a
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Sensitivity Analysis: +InAK>NZ'  
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                 |----------------- Minimum ----------------| |----------------- Maximum ----------------| fWiefv[&  
Type                      Value      Criterion        Change          Value      Criterion        Change  *X- 6]C  
Fringe tolerance on surface 1 l]D?S]{a  
TFRN   1            -1.00000000     0.54257256    -0.00145977     1.00000000     0.54548607     0.00145374 !i=LQUi.  
Change in Focus                :      -0.000000                            0.000000 0; GnR0  
Fringe tolerance on surface 2
!dQG 5v  
TFRN   2            -1.00000000     0.54177471    -0.00225762     1.00000000     0.54627463     0.00224230 \x?q!(;G2  
Change in Focus                :       0.000000                            0.000000 |6/k2d{,(  
Fringe tolerance on surface 3 _1jd{?kt  
TFRN   3            -1.00000000     0.54779866     0.00376632     1.00000000     0.54022572    -0.00380662 B@g 0QgA  
Change in Focus                :      -0.000000                            0.000000 Y^DS~CrM  
Thickness tolerance on surface 1 0Y[LzLn  
TTHI   1   3        -0.20000000     0.54321462    -0.00081772     0.20000000     0.54484759     0.00081525 (8DJ
f"}  
Change in Focus                :       0.000000                            0.000000 8sb<$M$c  
Thickness tolerance on surface 2 ,>%2`Z)  
TTHI   2   3        -0.20000000     0.54478712     0.00075478     0.20000000     0.54327558    -0.00075675 ?oF+?l  
Change in Focus                :       0.000000                           -0.000000 ;v%Fw!b032  
Decenter X tolerance on surfaces 1 through 3 'F>eieO
 
TEDX   1   3        -0.20000000     0.54401464   -1.7700E-005     0.20000000     0.54401464   -1.7700E-005 &5>R>rnB  
Change in Focus                :       0.000000                            0.000000 5ZeE& vG2  
Decenter Y tolerance on surfaces 1 through 3 Ojqbj0E9  
TEDY   1   3        -0.20000000     0.54401464   -1.7700E-005     0.20000000     0.54401464   -1.7700E-005 >xQgCOi  
Change in Focus                :       0.000000                            0.000000 iIWz\FM  
Tilt X tolerance on surfaces 1 through 3 (degrees) [iVCorU  
TETX   1   3        -0.20000000     0.54897548     0.00494314     0.20000000     0.54897548     0.00494314 feM%-  
Change in Focus                :       0.000000                            0.000000
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Tilt Y tolerance on surfaces 1 through 3 (degrees) 6[fpe  
TETY   1   3        -0.20000000     0.54897548     0.00494314     0.20000000     0.54897548     0.00494314
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Change in Focus                :       0.000000                            0.000000 e0iE6:i  
Decenter X tolerance on surface 1 /Y$UJt  
TSDX   1            -0.20000000     0.53999563    -0.00403671     0.20000000     0.53999563    -0.00403671 W" >[sn|  
Change in Focus                :       0.000000                            0.000000 BoQLjS{kN  
Decenter Y tolerance on surface 1 GPBp.$q+B  
TSDY   1            -0.20000000     0.53999563    -0.00403671     0.20000000     0.53999563    -0.00403671 +-tvNX%IJ  
Change in Focus                :       0.000000                            0.000000 )yvI {  
Tilt X tolerance on surface (degrees) 1 cojtQD
6  
TSTX   1            -0.20000000     0.42678383    -0.11724851     0.20000000     0.42678383    -0.11724851
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Change in Focus                :       0.000000                            0.000000 M^^5JNY  
Tilt Y tolerance on surface (degrees) 1 '.Iz*%"  
TSTY   1            -0.20000000     0.42678383    -0.11724851     0.20000000     0.42678383    -0.11724851 >i^8K U  
Change in Focus                :       0.000000                            0.000000 ):"Z7~j=  
Decenter X tolerance on surface 2 So>P)d$8+  
TSDX   2            -0.20000000     0.51705427    -0.02697807     0.20000000     0.51705427    -0.02697807 >iD&n4TK  
Change in Focus                :       0.000000                            0.000000 d%1Tv1={  
Decenter Y tolerance on surface 2 *J[3f]PBmR  
TSDY   2            -0.20000000     0.51705427    -0.02697807     0.20000000     0.51705427    -0.02697807 l&3f<e  
Change in Focus                :       0.000000                            0.000000 0/{$5gy&  
Tilt X tolerance on surface (degrees) 2 AX6z4G  
TSTX   2            -0.20000000     0.35349910    -0.19053324     0.20000000     0.35349910    -0.19053324 7|4t;F!  
Change in Focus                :       0.000000                            0.000000 E"d\N-I  
Tilt Y tolerance on surface (degrees) 2 ~aKM+KmtPH  
TSTY   2            -0.20000000     0.35349910    -0.19053324     0.20000000     0.35349910    -0.19053324 Z*&y8;vUQ  
Change in Focus                :       0.000000                            0.000000 K@av32{  
Decenter X tolerance on surface 3 %04N"^mT'~  
TSDX   3            -0.20000000     0.53419039    -0.00984195     0.20000000     0.53419039    -0.00984195 fik*-$V`  
Change in Focus                :       0.000000                            0.000000 v4M1uJ8  
Decenter Y tolerance on surface 3 05= $Dnv  
TSDY   3            -0.20000000     0.53419039    -0.00984195     0.20000000     0.53419039    -0.00984195 B \?We\y  
Change in Focus                :       0.000000                            0.000000 ^s*j<fH  
Tilt X tolerance on surface (degrees) 3 *sNZ.Y:.  
TSTX   3            -0.20000000     0.42861670    -0.11541563     0.20000000     0.42861670    -0.11541563 R@*mMWW,  
Change in Focus                :       0.000000                            0.000000 0($@9k4!/  
Tilt Y tolerance on surface (degrees) 3 lmmB=F  
TSTY   3            -0.20000000     0.42861670    -0.11541563     0.20000000     0.42861670    -0.11541563 Gk~QgD/Pix  
Change in Focus                :       0.000000                            0.000000 q\+khy,k  
Irregularity of surface 1 in fringes M"cB6{st[  
TIRR   1            -0.20000000     0.50973587    -0.03429647     0.20000000     0.57333868     0.02930634 qm RdO R  
Change in Focus                :       0.000000                            0.000000 n~~0iU)  
Irregularity of surface 2 in fringes 5=< y%VF  
TIRR   2            -0.20000000     0.53400904    -0.01002330     0.20000000     0.55360281     0.00957047 @t
v3\eD  
Change in Focus                :       0.000000                            0.000000 b{T". @b  
Irregularity of surface 3 in fringes PL+r*M%ll  
TIRR   3            -0.20000000     0.58078982     0.03675748     0.20000000     0.49904394    -0.04498840 >K]s)VuWR  
Change in Focus                :       0.000000                            0.000000 b| e7mis@  
Index tolerance on surface 1 WhPwD6l>  
TIND   1            -0.00100000     0.52606778    -0.01796456     0.00100000     0.56121811     0.01718578 7G,{BBB  
Change in Focus                :       0.000000                            0.000000 {NmpTb  
Index tolerance on surface 2 uu08q<B5b)  
TIND   2            -0.00100000     0.55639086     0.01235852     0.00100000     0.53126361    -0.01276872 b*C\0D  
Change in Focus                :       0.000000                           -0.000000 :|j,x7&/{  
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Worst offenders: O>8|Lc  
Type                      Value      Criterion        Change |Z\?nZ~  
TSTY   2            -0.20000000     0.35349910    -0.19053324 i%~^3/K  
TSTY   2             0.20000000     0.35349910    -0.19053324 D@jG+k-Lm  
TSTX   2            -0.20000000     0.35349910    -0.19053324 DeqTr:  
TSTX   2             0.20000000     0.35349910    -0.19053324 }^T7S2_Qy  
TSTY   1            -0.20000000     0.42678383    -0.11724851 w8MQA!=l  
TSTY   1             0.20000000     0.42678383    -0.11724851 2|="!c8K  
TSTX   1            -0.20000000     0.42678383    -0.11724851 8:W,""  
TSTX   1             0.20000000     0.42678383    -0.11724851 *g0}pD;r  
TSTY   3            -0.20000000     0.42861670    -0.11541563 AH*{Bi[vX  
TSTY   3             0.20000000     0.42861670    -0.11541563 4k}3^.#  
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Estimated Performance Changes based upon Root-Sum-Square method: /-Saz29f^Q  
Nominal MTF                 :     0.54403234 [VvTR#^  
Estimated change            :    -0.36299231 +y%"[6c|  
Estimated MTF               :     0.18104003 NO(^P+s  
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Compensator Statistics: '.Ww*N  
Change in back focus: U`{'-L.  
Minimum            :        -0.000000 Cxn<#Kf\-<  
Maximum            :         0.000000 ~|W0+&):  
Mean               :        -0.000000 @UbH;m  
Standard Deviation :         0.000000 YH_m
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JCL+uEX4S  
Monte Carlo Analysis:
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Number of trials: 20 {VBn@^'s  
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Initial Statistics: Normal Distribution KyQO>g{R  
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  Trial       Criterion        Change 87QK&S\  
      1     0.42804416    -0.11598818 z]/;?  
Change in Focus                :      -0.400171 zWN/>~}U\  
      2     0.54384387    -0.00018847 x2q6y  
Change in Focus                :       1.018470 bfjC:"!H  
      3     0.44510003    -0.09893230 v|\<N!g  
Change in Focus                :      -0.601922 B=EI&+F+  
      4     0.18154684    -0.36248550 L5+X&  
Change in Focus                :       0.920681 Iq76JJuCb  
      5     0.28665820    -0.25737414 '7lHWqN<  
Change in Focus                :       1.253875 x,CTB  
      6     0.21263372    -0.33139862 Y]zy=8q  
Change in Focus                :      -0.903878 o'oA.'ul  
      7     0.40051424    -0.14351809 h=:*cqp4  
Change in Focus                :      -1.354815 |E%i t?3M  
      8     0.48754161    -0.05649072 d|P,e;m-  
Change in Focus                :       0.215922 I:~KF/q  
      9     0.40357468    -0.14045766 cRR[ci34k  
Change in Focus                :       0.281783 \a_75^2  
     10     0.26315315    -0.28087919 K;:_UJ>t  
Change in Focus                :      -1.048393 ^M:Y$9r_s  
     11     0.26120585    -0.28282649 Dd:TFZo  
Change in Focus                :       1.017611 iy<|<*s2D  
     12     0.24033815    -0.30369419 y4@zi"G  
Change in Focus                :      -0.109292 Y/%(4q*'  
     13     0.37164046    -0.17239188 {Xw6]d  
Change in Focus                :      -0.692430 L|?$F*bs  
     14     0.48597489    -0.05805744 JAQ y  
Change in Focus                :      -0.662040 _Q9Mn-&qQ  
     15     0.21462327    -0.32940907 kp6{QKDj&  
Change in Focus                :       1.611296 aUy!(Y  
     16     0.43378226    -0.11025008 _1c0pQ^}3  
Change in Focus                :      -0.640081 W2$MH: j  
     17     0.39321881    -0.15081353 65%WjO  
Change in Focus                :       0.914906 9\QeH'A  
     18     0.20692530    -0.33710703 Po)!vL"   
Change in Focus                :       0.801607 mp!S<m  
     19     0.51374068    -0.03029165 %>z4hH,  
Change in Focus                :       0.947293 >/]` f8^  
     20     0.38013374    -0.16389860 p\'0m0*   
Change in Focus                :       0.667010 kFRl+,bi~  
ifXGH>C  
Number of traceable Monte Carlo files generated: 20 pmWt7 }  
O(R1D/A[  
Nominal     0.54403234 ; ,vGw<|o  
Best        0.54384387    Trial     2 Q!91uNL  
Worst       0.18154684    Trial     4 c\Z.V*o  
Mean        0.35770970 wV604eO(  
Std Dev     0.11156454 X7bS{GT  
& t.G4  
rIh"MQvi[  
Compensator Statistics: A_y]6~Mu?~  
Change in back focus: iBM;$0Y  
Minimum            :        -1.354815 ?rJe"TOIy  
Maximum            :         1.611296 d3[O!4<T
  
Mean               :         0.161872 #VvU8"u  
Standard Deviation :         0.869664 5LX%S.CW  
s3/iG37K  
90% >       0.20977951               TQ,KPf$0U  
80% >       0.22748071               FxFRrRRH@  
50% >       0.38667627               qk{+Y  
20% >       0.46553746               O x),jc[/  
10% >       0.50064115                +W%3VV$  
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End of Run. U.GRN)fL4  
N^TE ;BM  
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 6CV9ewr  

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 Q,m&XpZ  
W=S
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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                 63fgl+  
80% >       0.22748071                 _]t^F9l  
50% >       0.38667627                 V%Ww;Ca]I  
20% >       0.46553746                 "j/jhe6  
10% >       0.50064115 a{@gzB  
60#eTo?}o  
最后这个数值是MTF值呢，还是MTF的公差？ $]<wQ
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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？？？   xl ]1TB@  
^oMdx2Ow#  
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  : .=zBUvy  
90% >       0.20977951                 >en\:pJn)'  
80% >       0.22748071                 4BZ7R,m#.  
50% >       0.38667627                 [)?yH3  
20% >       0.46553746                 %c@PTpAM  
10% >       0.50064115 Q^8/"aV\  
....... X>%li$9J.  

hi/Z>1ZOX  
Z*'<9l_1  
这些数值都是MTF值

Criterion           : Geometric MTF average S&T at 30.0000 cycles per mm   ]cM8TT  
Mode                : Sensitivities BIEq(/-  
Sampling            : 2 V
jd(Z  
Nominal Criterion   : 0.54403234 sR^b_/ElxT  
Test Wavelength     : 0.6328 Z3U%Afl2{  
Vh
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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？ 9I*2xy|I  
jrpki<D  
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