[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 ch,|1}bi  
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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 /e5\9  
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图片:2.jpg

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然后运行分析的结果如下： iK x+6v  
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Analysis of Tolerances Gc5VQ^]  
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File : E:\光学设计资料\zemax练习\f500.ZMX eti9nPjG  
Title: jyjQzt >\  
Date : TUE JUN 21 2011 rdI]\UH  
2NR7V*A  
Units are Millimeters. ?Y!U*& 7  
All changes are computed using linear differences. p+D=}O  
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Paraxial Focus compensation only. V [4n'LcE  
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WARNING: Solves should be removed prior to tolerancing. {"4<To]z  
/W9 &Ke  
Mnemonics: %AgA -pBp  
TFRN: Tolerance on curvature in fringes. 9UmBm#"  
TTHI: Tolerance on thickness. ;vUxO<cKFq  
TSDX: Tolerance on surface decentering in x. z+6QZQk  
TSDY: Tolerance on surface decentering in y. D% @KRcp^b  
TSTX: Tolerance on surface tilt in x (degrees). #O6 EP#B  
TSTY: Tolerance on surface tilt in y (degrees). yam}x*O\xn  
TIRR: Tolerance on irregularity (fringes). $F1_^A[  
TIND: Tolerance on Nd index of refraction. : ~'Z(-a  
TEDX: Tolerance on element decentering in x. #`58F
.  
TEDY: Tolerance on element decentering in y. Z3n~&!  
TETX: Tolerance on element tilt in x (degrees). 7%opzdS#  
TETY: Tolerance on element tilt in y (degrees). 4f  jC  
q4k`)?k9  
WARNING: RAY AIMING IS OFF. Very loose tolerances may not be computed accurately. w7ZG oh(  
zkG>u,B}  
WARNING: Boundary constraints on compensators will be ignored. =f4<({9  
|<2 *v-a  
Criterion           : Geometric MTF average S&T at 30.0000 cycles per mm |Pf(J;'[  
Mode                : Sensitivities 2|s<[V3rP-  
Sampling            : 2 zze z~bv7:  
Nominal Criterion   : 0.54403234 ]F_r6*<  
Test Wavelength     : 0.6328 w#
<^RKk  
Z{#"-UG  
59K}  
Fields: XY Symmetric Angle in degrees QD}1?)}  
#      X-Field      Y-Field       Weight    VDX    VDY    VCX    VCY @4&, #xo  
1   0.000E+000   0.000E+000   1.000E+000  0.000  0.000  0.000  0.000 (qj,GmcS  
;fkSrdj  
Sensitivity Analysis: W{\EE[XhCf  
'FqEB]gu  
                 |----------------- Minimum ----------------| |----------------- Maximum ----------------| tU(y~)]  
Type                      Value      Criterion        Change          Value      Criterion        Change SLg+H  
Fringe tolerance on surface 1 zw< 4G[u  
TFRN   1            -1.00000000     0.54257256    -0.00145977     1.00000000     0.54548607     0.00145374 OuNj:  
Change in Focus                :      -0.000000                            0.000000 drs-mt8  
Fringe tolerance on surface 2 h$|3dz N  
TFRN   2            -1.00000000     0.54177471    -0.00225762     1.00000000     0.54627463     0.00224230 }!=gP.Zu^  
Change in Focus                :       0.000000                            0.000000 j;G[%gi6{  
Fringe tolerance on surface 3 H)`@2~Y  
TFRN   3            -1.00000000     0.54779866     0.00376632     1.00000000     0.54022572    -0.00380662 [Ek42%  
Change in Focus                :      -0.000000                            0.000000 DQMPAj.  
Thickness tolerance on surface 1 _2#zeT5  
TTHI   1   3        -0.20000000     0.54321462    -0.00081772     0.20000000     0.54484759     0.00081525 OZa88&  
Change in Focus                :       0.000000                            0.000000 PE|PwqX  
Thickness tolerance on surface 2 %`
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TTHI   2   3        -0.20000000     0.54478712     0.00075478     0.20000000     0.54327558    -0.00075675 qj`,qm P  
Change in Focus                :       0.000000                           -0.000000 KS?mw`Nr  
Decenter X tolerance on surfaces 1 through 3 %mJ~F*Dy  
TEDX   1   3        -0.20000000     0.54401464   -1.7700E-005     0.20000000     0.54401464   -1.7700E-005 q;ZLaX\bFl  
Change in Focus                :       0.000000                            0.000000 CJv>/#$/F  
Decenter Y tolerance on surfaces 1 through 3 Q%I#{+OT  
TEDY   1   3        -0.20000000     0.54401464   -1.7700E-005     0.20000000     0.54401464   -1.7700E-005 Ma>:_0I5  
Change in Focus                :       0.000000                            0.000000 T!1SMo^  
Tilt X tolerance on surfaces 1 through 3 (degrees) 8.[&wyU  
TETX   1   3        -0.20000000     0.54897548     0.00494314     0.20000000     0.54897548     0.00494314 ))p$v
U3  
Change in Focus                :       0.000000                            0.000000 i,([YsRuou  
Tilt Y tolerance on surfaces 1 through 3 (degrees) u]P03B  
TETY   1   3        -0.20000000     0.54897548     0.00494314     0.20000000     0.54897548     0.00494314 _yNT=#/  
Change in Focus                :       0.000000                            0.000000 luibB&p1  
Decenter X tolerance on surface 1 zuk"  
TSDX   1            -0.20000000     0.53999563    -0.00403671     0.20000000     0.53999563    -0.00403671 Ut]2`8-  
Change in Focus                :       0.000000                            0.000000 sRi?]9JIl  
Decenter Y tolerance on surface 1 TF%3u
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TSDY   1            -0.20000000     0.53999563    -0.00403671     0.20000000     0.53999563    -0.00403671 A*a7\id!y  
Change in Focus                :       0.000000                            0.000000 8W;xi:CC  
Tilt X tolerance on surface (degrees) 1 ^Wif!u/HM  
TSTX   1            -0.20000000     0.42678383    -0.11724851     0.20000000     0.42678383    -0.11724851 xC[~Fyhp  
Change in Focus                :       0.000000                            0.000000 3mk=ZWwv  
Tilt Y tolerance on surface (degrees) 1 |xp$OL"a  
TSTY   1            -0.20000000     0.42678383    -0.11724851     0.20000000     0.42678383    -0.11724851 Q,D0kS P  
Change in Focus                :       0.000000                            0.000000 ';&0~[R[  
Decenter X tolerance on surface 2 Wgav>7!9  
TSDX   2            -0.20000000     0.51705427    -0.02697807     0.20000000     0.51705427    -0.02697807 RzpC1nd  
Change in Focus                :       0.000000                            0.000000 m5)EQE}gPp  
Decenter Y tolerance on surface 2 UOw~rK   
TSDY   2            -0.20000000     0.51705427    -0.02697807     0.20000000     0.51705427    -0.02697807 jYrym-  
Change in Focus                :       0.000000                            0.000000 P87ld._  
Tilt X tolerance on surface (degrees) 2 L'13BRu`  
TSTX   2            -0.20000000     0.35349910    -0.19053324     0.20000000     0.35349910    -0.19053324 d[)_sa  
Change in Focus                :       0.000000                            0.000000 C/CN '  
Tilt Y tolerance on surface (degrees) 2 ax<g0=^R  
TSTY   2            -0.20000000     0.35349910    -0.19053324     0.20000000     0.35349910    -0.19053324 }iD$4\ L  
Change in Focus                :       0.000000                            0.000000 $4DFgvy$  
Decenter X tolerance on surface 3 yQ8M >H#J  
TSDX   3            -0.20000000     0.53419039    -0.00984195     0.20000000     0.53419039    -0.00984195 "EN98^ Sl  
Change in Focus                :       0.000000                            0.000000 3b+7^0frY#  
Decenter Y tolerance on surface 3 4g>1Gqv6  
TSDY   3            -0.20000000     0.53419039    -0.00984195     0.20000000     0.53419039    -0.00984195 &}>|5>cJu  
Change in Focus                :       0.000000                            0.000000 /.7$`d  
Tilt X tolerance on surface (degrees) 3 Yr5iZ~V$  
TSTX   3            -0.20000000     0.42861670    -0.11541563     0.20000000     0.42861670    -0.11541563 C5>{Q:.`e'  
Change in Focus                :       0.000000                            0.000000 xR*5q1j  
Tilt Y tolerance on surface (degrees) 3 {An8/"bv}  
TSTY   3            -0.20000000     0.42861670    -0.11541563     0.20000000     0.42861670    -0.11541563 &1*4%N@'  
Change in Focus                :       0.000000                            0.000000 `@4 2jG}*  
Irregularity of surface 1 in fringes Sc%aJ1  
TIRR   1            -0.20000000     0.50973587    -0.03429647     0.20000000     0.57333868     0.02930634 Uc\|X;nkRk  
Change in Focus                :       0.000000                            0.000000 ooomi"u  
Irregularity of surface 2 in fringes b;Hm\aK  
TIRR   2            -0.20000000     0.53400904    -0.01002330     0.20000000     0.55360281     0.00957047 6lN?)<uQ  
Change in Focus                :       0.000000                            0.000000 M_qP!+Y  
Irregularity of surface 3 in fringes +]A+!8%Z  
TIRR   3            -0.20000000     0.58078982     0.03675748     0.20000000     0.49904394    -0.04498840 uG2Xkj  
Change in Focus                :       0.000000                            0.000000 -"2<h:#  
Index tolerance on surface 1 kSLSxfR  
TIND   1            -0.00100000     0.52606778    -0.01796456     0.00100000     0.56121811     0.01718578 J f\Qf  
Change in Focus                :       0.000000                            0.000000 8dr0 DF$c  
Index tolerance on surface 2 X QI.0L"  
TIND   2            -0.00100000     0.55639086     0.01235852     0.00100000     0.53126361    -0.01276872 ,@}W@GGP)  
Change in Focus                :       0.000000                           -0.000000 'Y hA  
UN,<6D3\b  
Worst offenders: +F1]M2p]  
Type                      Value      Criterion        Change 3js)niT9u  
TSTY   2            -0.20000000     0.35349910    -0.19053324 OI'uH$y  
TSTY   2             0.20000000     0.35349910    -0.19053324 bq c;.4$  
TSTX   2            -0.20000000     0.35349910    -0.19053324 &W&7bZ$;  
TSTX   2             0.20000000     0.35349910    -0.19053324 yfPCGCOW?  
TSTY   1            -0.20000000     0.42678383    -0.11724851 bk/.<Rt  
TSTY   1             0.20000000     0.42678383    -0.11724851 [P.@1mV  
TSTX   1            -0.20000000     0.42678383    -0.11724851 C*"Rd   
TSTX   1             0.20000000     0.42678383    -0.11724851 vs5 D:cZ}  
TSTY   3            -0.20000000     0.42861670    -0.11541563 `Mo~EHso.  
TSTY   3             0.20000000     0.42861670    -0.11541563 EZ:I$X  
&i4 (s%z#  
Estimated Performance Changes based upon Root-Sum-Square method: 6&g!ZE'G  
Nominal MTF                 :     0.54403234 WpZy](,  
Estimated change            :    -0.36299231 Q'FX:[@x-S  
Estimated MTF               :     0.18104003 M\:"~XW  
:GN)7|:  
Compensator Statistics: OwNAN  
Change in back focus: #]?,gwvTf  
Minimum            :        -0.000000 F7k4C2r  
Maximum            :         0.000000 .a 'ETNY:>  
Mean               :        -0.000000 $=\oJ-(!@S  
Standard Deviation :         0.000000 @/_
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Monte Carlo Analysis: X
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Number of trials: 20 H j>L>6>  
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Initial Statistics: Normal Distribution 7VEt4  
|u?k-,uI9  
  Trial       Criterion        Change OlD7-c2L]  
      1     0.42804416    -0.11598818 ,U|u-.~ZU  
Change in Focus                :      -0.400171 o`<h=+a\  
      2     0.54384387    -0.00018847 J,dG4.ht  
Change in Focus                :       1.018470 Wh#_9);  
      3     0.44510003    -0.09893230 d&GKfF  
Change in Focus                :      -0.601922 +^^S'mP8  
      4     0.18154684    -0.36248550 >m)2ox_B  
Change in Focus                :       0.920681 [8V(N2  
      5     0.28665820    -0.25737414 S*~Na]nS0  
Change in Focus                :       1.253875 LM'*OtpDG  
      6     0.21263372    -0.33139862 zJB+C=]D7H  
Change in Focus                :      -0.903878 Li?{e+g  
      7     0.40051424    -0.14351809 S>/I?(J  
Change in Focus                :      -1.354815 (P]^8qc  
      8     0.48754161    -0.05649072 : L6-{9$  
Change in Focus                :       0.215922 )_x8?:lv  
      9     0.40357468    -0.14045766 ql%]$`IV6  
Change in Focus                :       0.281783  6Dr$
*9  
     10     0.26315315    -0.28087919 _js2^<7v}  
Change in Focus                :      -1.048393 K8Kz  
     11     0.26120585    -0.28282649 (&N$W&  
Change in Focus                :       1.017611 &gKP6ANx2  
     12     0.24033815    -0.30369419 I&Eg-96@  
Change in Focus                :      -0.109292 TkoCyD9  
     13     0.37164046    -0.17239188 @=aq&gb  
Change in Focus                :      -0.692430 +e{d
jp@m  
     14     0.48597489    -0.05805744 OTy4"%  
Change in Focus                :      -0.662040 h!J
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     15     0.21462327    -0.32940907 l*m]2"n]  
Change in Focus                :       1.611296 nKZRq&~^E  
     16     0.43378226    -0.11025008 -Z\UYt  
Change in Focus                :      -0.640081 Qh1Kl_a?Lv  
     17     0.39321881    -0.15081353 a*$1la'Uf  
Change in Focus                :       0.914906 OFPd6,(E  
     18     0.20692530    -0.33710703 =t>`<T|(  
Change in Focus                :       0.801607 BZ'y}Zu*  
     19     0.51374068    -0.03029165 ^5zS2nm  
Change in Focus                :       0.947293 'amex  
     20     0.38013374    -0.16389860 5p>]zij>  
Change in Focus                :       0.667010 TTw~.
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L>R!A3G1  
Number of traceable Monte Carlo files generated: 20 JY,l#?lM{  
Nr*ibtz|D  
Nominal     0.54403234 zs]>XO~Jg  
Best        0.54384387    Trial     2 ph|2lLZ  
Worst       0.18154684    Trial     4 /[)P^L`  
Mean        0.35770970 #ui%=ja[:~  
Std Dev     0.11156454 jWb\"0)  
|H|eH~.yg&  
B'#gs'fl  
Compensator Statistics: b ffml  
Change in back focus: A<G ;  
Minimum            :        -1.354815 EXM/>PG  
Maximum            :         1.611296 ywa.cq  
Mean               :         0.161872 OG<]`!"  
Standard Deviation :         0.869664 4dD@lG~  
GmWQJYX\  
90% >       0.20977951               u+i/CE#w  
80% >       0.22748071               !*QA;*e  
50% >       0.38667627               }v|[h[cZ  
20% >       0.46553746               Z~R/p;@  
10% >       0.50064115                &G5I0:a   
<k8rSxn{  
End of Run. u*YuU%H=  
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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 
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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 hD~/6bx  
5;%xqdD  
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                 zm.sX~j  
80% >       0.22748071                 0To 5|r  
50% >       0.38667627                 c_=zd6 b$S  
20% >       0.46553746                 Ft>8 YYyU  
10% >       0.50064115 "TCbO`mg  
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最后这个数值是MTF值呢，还是MTF的公差？ (8/xSOZ[  
J@-9{<
  
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？？？   }tq9 /\  
3hjwwLKG$  
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  : OZD/t(4?6s  
90% >       0.20977951                  AHb   
80% >       0.22748071                 jEadVM9  
50% >       0.38667627                 eAj}/2y"  
20% >       0.46553746                 GupKM%kM  
10% >       0.50064115 TV}SKvu  
....... SzDi=lY  

K;~dZ  
7pNh|#Uv'  
这些数值都是MTF值

Criterion           : Geometric MTF average S&T at 30.0000 cycles per mm   m{g{"=}YR  
Mode                : Sensitivities >y?$aJ8ZV  
Sampling            : 2 Bn.8wMB  
Nominal Criterion   : 0.54403234 #>0nNR[$Y  
Test Wavelength     : 0.6328 mVxS[Gq  
f-Sb:O!V  
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？ Eq|_>f@@8  
!Ed';yfz\(  
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