[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 Ss~dK-{e7  
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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 K1K3s<y+  
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图片:2.jpg

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然后运行分析的结果如下： Z#lZn!EbK  
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Analysis of Tolerances :{Crc   
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File : E:\光学设计资料\zemax练习\f500.ZMX aD,(mw-7r  
Title: On{p(|l  
Date : TUE JUN 21 2011 p;VHg  
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Units are Millimeters. ^"!j m  
All changes are computed using linear differences. a:(.{z?nM  
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Paraxial Focus compensation only. ]7`)|PJ  
S%7^7MSqA  
WARNING: Solves should be removed prior to tolerancing. ?u9JRXj%  
iX{Lc+u3  
Mnemonics: ['S
Ze0  
TFRN: Tolerance on curvature in fringes. phA^ kdW  
TTHI: Tolerance on thickness. SH/KC  
TSDX: Tolerance on surface decentering in x. loLN ~6  
TSDY: Tolerance on surface decentering in y. Q'~2,%3<  
TSTX: Tolerance on surface tilt in x (degrees). IW.~I,!x  
TSTY: Tolerance on surface tilt in y (degrees). aBO%qmtt  
TIRR: Tolerance on irregularity (fringes). ;*Cu >f7  
TIND: Tolerance on Nd index of refraction. B>CG/]  
TEDX: Tolerance on element decentering in x. A:3:Cr  
TEDY: Tolerance on element decentering in y. '}D$"2I*  
TETX: Tolerance on element tilt in x (degrees). uZ-yu|1  
TETY: Tolerance on element tilt in y (degrees). Zw[A1!T,  
D:gskK+o6M  
WARNING: RAY AIMING IS OFF. Very loose tolerances may not be computed accurately. 4ISZyO=  
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WARNING: Boundary constraints on compensators will be ignored. ? D?XaRb  
*k(>Qsb "  
Criterion           : Geometric MTF average S&T at 30.0000 cycles per mm K0i[D"
 
Mode                : Sensitivities X~O2!F  
Sampling            : 2 xYJ|G=h&A  
Nominal Criterion   : 0.54403234 I3A@0'Vm;L  
Test Wavelength     : 0.6328 ^uu)
|  
=jX'FNv#  
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Fields: XY Symmetric Angle in degrees fBptjt_  
#      X-Field      Y-Field       Weight    VDX    VDY    VCX    VCY <xm>_~,w  
1   0.000E+000   0.000E+000   1.000E+000  0.000  0.000  0.000  0.000 YJlpP0;++  
:n:Gr?  
Sensitivity Analysis: $~|#Rz%v  
`2X#;{a:  
                 |----------------- Minimum ----------------| |----------------- Maximum ----------------| 1%YjY"j+  
Type                      Value      Criterion        Change          Value      Criterion        Change 4wZ{Z 2w  
Fringe tolerance on surface 1 D|u! KH  
TFRN   1            -1.00000000     0.54257256    -0.00145977     1.00000000     0.54548607     0.00145374 EPQ~V  
Change in Focus                :      -0.000000                            0.000000 l%?D%'afN  
Fringe tolerance on surface 2 m8q3Pp  
TFRN   2            -1.00000000     0.54177471    -0.00225762     1.00000000     0.54627463     0.00224230 8\BCC1K  
Change in Focus                :       0.000000                            0.000000 ZX0ZN2 ]  
Fringe tolerance on surface 3 / ;U  
TFRN   3            -1.00000000     0.54779866     0.00376632     1.00000000     0.54022572    -0.00380662 :RsO$@0G  
Change in Focus                :      -0.000000                            0.000000 btC0w^5  
Thickness tolerance on surface 1 rRN7HL+b  
TTHI   1   3        -0.20000000     0.54321462    -0.00081772     0.20000000     0.54484759     0.00081525 2l)J,z  
Change in Focus                :       0.000000                            0.000000 Cz2OGM*mz?  
Thickness tolerance on surface 2 !H`Q^Xf}  
TTHI   2   3        -0.20000000     0.54478712     0.00075478     0.20000000     0.54327558    -0.00075675 /-ebx~FX&  
Change in Focus                :       0.000000                           -0.000000 ?qeBgkL(B^  
Decenter X tolerance on surfaces 1 through 3 kMGK8y  
TEDX   1   3        -0.20000000     0.54401464   -1.7700E-005     0.20000000     0.54401464   -1.7700E-005 l^s\^b
=W  
Change in Focus                :       0.000000                            0.000000 ?NZKu6  
Decenter Y tolerance on surfaces 1 through 3 :wJ=t/ho  
TEDY   1   3        -0.20000000     0.54401464   -1.7700E-005     0.20000000     0.54401464   -1.7700E-005 { jnQoxN  
Change in Focus                :       0.000000                            0.000000 8KioL{h  
Tilt X tolerance on surfaces 1 through 3 (degrees) %rpJZ t  
TETX   1   3        -0.20000000     0.54897548     0.00494314     0.20000000     0.54897548     0.00494314 fX,L;Se"  
Change in Focus                :       0.000000                            0.000000 @_tQ:U,v  
Tilt Y tolerance on surfaces 1 through 3 (degrees) #Y3:~dmJ-  
TETY   1   3        -0.20000000     0.54897548     0.00494314     0.20000000     0.54897548     0.00494314 J`T1 88  
Change in Focus                :       0.000000                            0.000000 c5K@<=?,E  
Decenter X tolerance on surface 1 } PD]e*z{Z  
TSDX   1            -0.20000000     0.53999563    -0.00403671     0.20000000     0.53999563    -0.00403671 WKf->W  
Change in Focus                :       0.000000                            0.000000 ;- D1n  
Decenter Y tolerance on surface 1 +?[,y  
TSDY   1            -0.20000000     0.53999563    -0.00403671     0.20000000     0.53999563    -0.00403671 ffuV158a&  
Change in Focus                :       0.000000                            0.000000 _c=[P@  
Tilt X tolerance on surface (degrees) 1 &+?JY|u  
TSTX   1            -0.20000000     0.42678383    -0.11724851     0.20000000     0.42678383    -0.11724851 oyGO!j  
Change in Focus                :       0.000000                            0.000000 pu(a&0  
Tilt Y tolerance on surface (degrees) 1 )P:r;a'  
TSTY   1            -0.20000000     0.42678383    -0.11724851     0.20000000     0.42678383    -0.11724851 lP>}9^7I!  
Change in Focus                :       0.000000                            0.000000 +~O0e-d  
Decenter X tolerance on surface 2 &TqY\l  
TSDX   2            -0.20000000     0.51705427    -0.02697807     0.20000000     0.51705427    -0.02697807 $EjM)  
Change in Focus                :       0.000000                            0.000000 ~c~$2Xo  
Decenter Y tolerance on surface 2 _pSCv:3T  
TSDY   2            -0.20000000     0.51705427    -0.02697807     0.20000000     0.51705427    -0.02697807 \#P>k;D  
Change in Focus                :       0.000000                            0.000000 d,fX3  
Tilt X tolerance on surface (degrees) 2 -2}-;|  
TSTX   2            -0.20000000     0.35349910    -0.19053324     0.20000000     0.35349910    -0.19053324 EG<YxNX,  
Change in Focus                :       0.000000                            0.000000 \atztC{-L>  
Tilt Y tolerance on surface (degrees) 2 \ltA&}!  
TSTY   2            -0.20000000     0.35349910    -0.19053324     0.20000000     0.35349910    -0.19053324 s)#8>s-  
Change in Focus                :       0.000000                            0.000000 Ys@M1o  
Decenter X tolerance on surface 3 P"dWh;I_  
TSDX   3            -0.20000000     0.53419039    -0.00984195     0.20000000     0.53419039    -0.00984195 \{F{yq(  
Change in Focus                :       0.000000                            0.000000 *u$MqN  
Decenter Y tolerance on surface 3 I#0WN  
TSDY   3            -0.20000000     0.53419039    -0.00984195     0.20000000     0.53419039    -0.00984195 hlPZTr=a  
Change in Focus                :       0.000000                            0.000000 ].f28bY  
Tilt X tolerance on surface (degrees) 3 ~7$E\w6  
TSTX   3            -0.20000000     0.42861670    -0.11541563     0.20000000     0.42861670    -0.11541563 ;[*jLi,uc  
Change in Focus                :       0.000000                            0.000000 }cK<2J#  
Tilt Y tolerance on surface (degrees) 3 <eU28M?\  
TSTY   3            -0.20000000     0.42861670    -0.11541563     0.20000000     0.42861670    -0.11541563 8}m bfuo1  
Change in Focus                :       0.000000                            0.000000 kG:,Ff>  
Irregularity of surface 1 in fringes @SREyqC4  
TIRR   1            -0.20000000     0.50973587    -0.03429647     0.20000000     0.57333868     0.02930634 VeixwGZ.  
Change in Focus                :       0.000000                            0.000000 6iwIEb  
Irregularity of surface 2 in fringes / ,3,l^kZ  
TIRR   2            -0.20000000     0.53400904    -0.01002330     0.20000000     0.55360281     0.00957047 >[ r TUn;  
Change in Focus                :       0.000000                            0.000000 O$}p}%%y7  
Irregularity of surface 3 in fringes 8*rd`k1|g  
TIRR   3            -0.20000000     0.58078982     0.03675748     0.20000000     0.49904394    -0.04498840 Qe=,EXf  
Change in Focus                :       0.000000                            0.000000 MWv_BXQ  
Index tolerance on surface 1 6"^Yn.  
TIND   1            -0.00100000     0.52606778    -0.01796456     0.00100000     0.56121811     0.01718578 S Rs~p  
Change in Focus                :       0.000000                            0.000000 N&`VMEB)k  
Index tolerance on surface 2 ,3_;JT"5  
TIND   2            -0.00100000     0.55639086     0.01235852     0.00100000     0.53126361    -0.01276872 x{Y}1+Y4  
Change in Focus                :       0.000000                           -0.000000 j4wcxZYY~  
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Worst offenders: i"=6n>\  
Type                      Value      Criterion        Change mQmn&:R  
TSTY   2            -0.20000000     0.35349910    -0.19053324 J/3qJst
 
TSTY   2             0.20000000     0.35349910    -0.19053324 D}|PBR  
TSTX   2            -0.20000000     0.35349910    -0.19053324 zzsQfI#  
TSTX   2             0.20000000     0.35349910    -0.19053324 0-H!\IB  
TSTY   1            -0.20000000     0.42678383    -0.11724851 IUco 8  
TSTY   1             0.20000000     0.42678383    -0.11724851 yT Pi/=G  
TSTX   1            -0.20000000     0.42678383    -0.11724851 ^06f\7A  
TSTX   1             0.20000000     0.42678383    -0.11724851 8d9&LPv  
TSTY   3            -0.20000000     0.42861670    -0.11541563 H`/QhE  
TSTY   3             0.20000000     0.42861670    -0.11541563 rrK&XP&  
5y7rY!]Bf  
Estimated Performance Changes based upon Root-Sum-Square method: 9-;ujl?{  
Nominal MTF                 :     0.54403234 k9j_#\E[  
Estimated change            :    -0.36299231 8H4"mx
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Estimated MTF               :     0.18104003 jEj#
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Compensator Statistics: u.( WW(/N  
Change in back focus: av>c  
Minimum            :        -0.000000 ea3;1-b:  
Maximum            :         0.000000 uGm~ Oo  
Mean               :        -0.000000 J(*qOG
BD  
Standard Deviation :         0.000000 rj[2XIO  
m1x7f%_  
Monte Carlo Analysis: sS5 ]d8  
Number of trials: 20 {@Y|"qIN  
>r%L=22+  
Initial Statistics: Normal Distribution V{17iRflf  
F&US-ce:M  
  Trial       Criterion        Change :TU;%@7  
      1     0.42804416    -0.11598818 ,]?Xf>  
Change in Focus                :      -0.400171 \\F^uM7,  
      2     0.54384387    -0.00018847 c"BFkw  
Change in Focus                :       1.018470 3V:{_~~  
      3     0.44510003    -0.09893230 [:gPp)f,  
Change in Focus                :      -0.601922 Le3H!9lbc  
      4     0.18154684    -0.36248550 ,4oYKJ$+h  
Change in Focus                :       0.920681 M,]C(f>  
      5     0.28665820    -0.25737414 b_=$W  
Change in Focus                :       1.253875 ~=hM y`Ml  
      6     0.21263372    -0.33139862 USz|Rh  
Change in Focus                :      -0.903878 VU+
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      7     0.40051424    -0.14351809 Va^Y3/  
Change in Focus                :      -1.354815 j-wSsjLk  
      8     0.48754161    -0.05649072 RAMkTS  
Change in Focus                :       0.215922 mdxa^#w  
      9     0.40357468    -0.14045766 L><# I  
Change in Focus                :       0.281783 $qkVu  
     10     0.26315315    -0.28087919 RUcpdeo  
Change in Focus                :      -1.048393 "?Dov/+Q.  
     11     0.26120585    -0.28282649 PI{;3X}9$,  
Change in Focus                :       1.017611 3xS+Pu\)  
     12     0.24033815    -0.30369419 &phers  
Change in Focus                :      -0.109292 Cz=HxU80J  
     13     0.37164046    -0.17239188 _t<&#D~  
Change in Focus                :      -0.692430 C Z8Fe$F  
     14     0.48597489    -0.05805744 4;anoqiG\  
Change in Focus                :      -0.662040 gL%%2 }$  
     15     0.21462327    -0.32940907 06@^knm  
Change in Focus                :       1.611296 4yhan/zA  
     16     0.43378226    -0.11025008 ^):m^w.  
Change in Focus                :      -0.640081 4]L5%=atn  
     17     0.39321881    -0.15081353 qEvHrsw},  
Change in Focus                :       0.914906 r0ml|PX  
     18     0.20692530    -0.33710703 , 'WhF-  
Change in Focus                :       0.801607 V
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     19     0.51374068    -0.03029165 @Qw~z0PE<l  
Change in Focus                :       0.947293 C9^[A4O@X!  
     20     0.38013374    -0.16389860 7_Yxz$m  
Change in Focus                :       0.667010 t)|*-=  
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Number of traceable Monte Carlo files generated: 20 "`P/j+-rt  
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Nominal     0.54403234 r{y&}gA  
Best        0.54384387    Trial     2 N$1ZA)M  
Worst       0.18154684    Trial     4 AF ,*bb  
Mean        0.35770970 v+a$Xh3Y~  
Std Dev     0.11156454 H4%2"w6|!  
~JjL411pG  
5,/rh,?  
Compensator Statistics: 2$=U#!OtU  
Change in back focus: Q]j[+e  
Minimum            :        -1.354815 +ZH-'l  
Maximum            :         1.611296 ,(d\!T/]'  
Mean               :         0.161872 rG7E[kii  
Standard Deviation :         0.869664 oNW.-gNT  
bI~ R6o  
90% >       0.20977951               Co|3k:I 8  
80% >       0.22748071               USF9sF0l  
50% >       0.38667627               @qP uYFnw  
20% >       0.46553746               +NML>g#F~z  
10% >       0.50064115                ZL!,s#  
Z) nB  
End of Run. pq8XCOllXx  
X.~z:W+  
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 p mv6m  

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 G- _h 2  
L{;Sc_  
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                 ^)J2tpr;]=  
80% >       0.22748071                 B#Q` !B4v  
50% >       0.38667627                 ;$a+ >  
20% >       0.46553746                 KjWF;VN*[3  
10% >       0.50064115 fyt ODsb>  
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最后这个数值是MTF值呢，还是MTF的公差？ <x!q!;  
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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？？？   V/.Na(C~  
CdEQiu  
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  : 8I}
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90% >       0.20977951                 'uW&ADp  
80% >       0.22748071                 w t6&N{@  
50% >       0.38667627                 w61*jnvi@  
20% >       0.46553746                 mP]a}[  
10% >       0.50064115 { v [  
....... Lp7h'|]u  

j5gL67B  
h]]B@~  
这些数值都是MTF值

Criterion           : Geometric MTF average S&T at 30.0000 cycles per mm   aH&Efz^  
Mode                : Sensitivities 5^97#;Q;J"  
Sampling            : 2 kxLWk%V  
Nominal Criterion   : 0.54403234 |\U5m6q  
Test Wavelength     : 0.6328 !{?<(6;t  
#Y0ru9
  
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？ Yw6uh4  
'A,)PZL9i  
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