[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 VU9P\|c@<  
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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 5Q`n6x|  
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图片:2.jpg

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然后运行分析的结果如下： F|TMpH/  
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Analysis of Tolerances v&2@<I>  
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File : E:\光学设计资料\zemax练习\f500.ZMX 1Uk~m  
Title: yB%)D0  
Date : TUE JUN 21 2011 xc.D!Iav  
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Units are Millimeters. ]fo^43rn{  
All changes are computed using linear differences. B
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Paraxial Focus compensation only. FK# E7 K  
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WARNING: Solves should be removed prior to tolerancing. e=sJMzm
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Mnemonics: w/5^R  
TFRN: Tolerance on curvature in fringes. |qcFmy  
TTHI: Tolerance on thickness. ^z}lGu  
TSDX: Tolerance on surface decentering in x. +'KE T,  
TSDY: Tolerance on surface decentering in y. !]+Z%ed`%  
TSTX: Tolerance on surface tilt in x (degrees). e>9Z:vY
 
TSTY: Tolerance on surface tilt in y (degrees). :
5<9/  
TIRR: Tolerance on irregularity (fringes). wZ8 MhE  
TIND: Tolerance on Nd index of refraction. A]Tcj^#  
TEDX: Tolerance on element decentering in x. fGf-fh;s  
TEDY: Tolerance on element decentering in y. ?%/u/*9rj  
TETX: Tolerance on element tilt in x (degrees). ywynx<Wg  
TETY: Tolerance on element tilt in y (degrees). ~vSAnjeR  
V!77YFen %  
WARNING: RAY AIMING IS OFF. Very loose tolerances may not be computed accurately. ?4[Oh/]R  
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WARNING: Boundary constraints on compensators will be ignored. 4bev*[k  
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Criterion           : Geometric MTF average S&T at 30.0000 cycles per mm C]yQ "b  
Mode                : Sensitivities 76A>^Bs\/  
Sampling            : 2 _b_?9b-)D  
Nominal Criterion   : 0.54403234 U5CPkH1  
Test Wavelength     : 0.6328 {XD/8m(hN|  
X";ZUp  
!Nl.Vb  
Fields: XY Symmetric Angle in degrees w zqd g  
#      X-Field      Y-Field       Weight    VDX    VDY    VCX    VCY ;=+Zw1/g  
1   0.000E+000   0.000E+000   1.000E+000  0.000  0.000  0.000  0.000 $@_t5?n``F  
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Sensitivity Analysis: .^~l_LkA  
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                 |----------------- Minimum ----------------| |----------------- Maximum ----------------| VkDS&g~Ws  
Type                      Value      Criterion        Change          Value      Criterion        Change 4s~HfxYT  
Fringe tolerance on surface 1 H >:4MY  
TFRN   1            -1.00000000     0.54257256    -0.00145977     1.00000000     0.54548607     0.00145374 daB l%a=  
Change in Focus                :      -0.000000                            0.000000 \}Acq;  
Fringe tolerance on surface 2 6L,lq;  
TFRN   2            -1.00000000     0.54177471    -0.00225762     1.00000000     0.54627463     0.00224230 9Ue7 ~"=  
Change in Focus                :       0.000000                            0.000000 Cb{A:\>Q{  
Fringe tolerance on surface 3 }\f(qw  
TFRN   3            -1.00000000     0.54779866     0.00376632     1.00000000     0.54022572    -0.00380662 ^{*f3m/
 
Change in Focus                :      -0.000000                            0.000000 (#bp`Kih  
Thickness tolerance on surface 1 Y62u%':X  
TTHI   1   3        -0.20000000     0.54321462    -0.00081772     0.20000000     0.54484759     0.00081525 TD{=L*{+  
Change in Focus                :       0.000000                            0.000000 /MKNv'5&!%  
Thickness tolerance on surface 2 $xA J9_2P  
TTHI   2   3        -0.20000000     0.54478712     0.00075478     0.20000000     0.54327558    -0.00075675 Lo9G4Cu  
Change in Focus                :       0.000000                           -0.000000 O~h94 B`  
Decenter X tolerance on surfaces 1 through 3 ~mK-8U4>K,  
TEDX   1   3        -0.20000000     0.54401464   -1.7700E-005     0.20000000     0.54401464   -1.7700E-005 <r<Dmn|\a  
Change in Focus                :       0.000000                            0.000000 _}zo /kDA  
Decenter Y tolerance on surfaces 1 through 3 s[3![ "^Y  
TEDY   1   3        -0.20000000     0.54401464   -1.7700E-005     0.20000000     0.54401464   -1.7700E-005 jF2[bzY4  
Change in Focus                :       0.000000                            0.000000 7Aio`&^  
Tilt X tolerance on surfaces 1 through 3 (degrees) G(As%r]  
TETX   1   3        -0.20000000     0.54897548     0.00494314     0.20000000     0.54897548     0.00494314 -VWCD,c  
Change in Focus                :       0.000000                            0.000000 lmhbF  
Tilt Y tolerance on surfaces 1 through 3 (degrees) #dZ/UM(u  
TETY   1   3        -0.20000000     0.54897548     0.00494314     0.20000000     0.54897548     0.00494314 VFl 1 f  
Change in Focus                :       0.000000                            0.000000 %6A-O
F  
Decenter X tolerance on surface 1 Y9i9Uc.]  
TSDX   1            -0.20000000     0.53999563    -0.00403671     0.20000000     0.53999563    -0.00403671 =t3vbV  
Change in Focus                :       0.000000                            0.000000 5#0A`QO   
Decenter Y tolerance on surface 1 %j*k  
TSDY   1            -0.20000000     0.53999563    -0.00403671     0.20000000     0.53999563    -0.00403671 j|[(*i%7|  
Change in Focus                :       0.000000                            0.000000 _Z+jQFKJ\8  
Tilt X tolerance on surface (degrees) 1 `6Ureui2?  
TSTX   1            -0.20000000     0.42678383    -0.11724851     0.20000000     0.42678383    -0.11724851 jby~AJf%  
Change in Focus                :       0.000000                            0.000000 S5~`T7Ra  
Tilt Y tolerance on surface (degrees) 1 h L]8e>a?  
TSTY   1            -0.20000000     0.42678383    -0.11724851     0.20000000     0.42678383    -0.11724851 
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Change in Focus                :       0.000000                            0.000000 jCTy:q]  
Decenter X tolerance on surface 2 Gla@
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TSDX   2            -0.20000000     0.51705427    -0.02697807     0.20000000     0.51705427    -0.02697807 Dac ^*k=D  
Change in Focus                :       0.000000                            0.000000 {sC@N
![  
Decenter Y tolerance on surface 2 G{kj}>kS_  
TSDY   2            -0.20000000     0.51705427    -0.02697807     0.20000000     0.51705427    -0.02697807 L1hD}J'$4  
Change in Focus                :       0.000000                            0.000000 H]_WFiW-9  
Tilt X tolerance on surface (degrees) 2 J>=1dCK  
TSTX   2            -0.20000000     0.35349910    -0.19053324     0.20000000     0.35349910    -0.19053324 +/y{^}b/  
Change in Focus                :       0.000000                            0.000000 ytjK++(T5  
Tilt Y tolerance on surface (degrees) 2
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TSTY   2            -0.20000000     0.35349910    -0.19053324     0.20000000     0.35349910    -0.19053324 3ppuQQ  
Change in Focus                :       0.000000                            0.000000 :E>&s9Yj?  
Decenter X tolerance on surface 3 ,IIZXl@  
TSDX   3            -0.20000000     0.53419039    -0.00984195     0.20000000     0.53419039    -0.00984195 w]};0v&\~s  
Change in Focus                :       0.000000                            0.000000 eo1&.FQu  
Decenter Y tolerance on surface 3 2GSgG.%SSM  
TSDY   3            -0.20000000     0.53419039    -0.00984195     0.20000000     0.53419039    -0.00984195 #
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Change in Focus                :       0.000000                            0.000000 })@tA<+  
Tilt X tolerance on surface (degrees) 3 \F 3C=M@:  
TSTX   3            -0.20000000     0.42861670    -0.11541563     0.20000000     0.42861670    -0.11541563 lPY@{1W  
Change in Focus                :       0.000000                            0.000000 m@ i2#  
Tilt Y tolerance on surface (degrees) 3 M^z=1YrMd  
TSTY   3            -0.20000000     0.42861670    -0.11541563     0.20000000     0.42861670    -0.11541563 =o
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Change in Focus                :       0.000000                            0.000000 u4:\UC'  
Irregularity of surface 1 in fringes XtCoX\da  
TIRR   1            -0.20000000     0.50973587    -0.03429647     0.20000000     0.57333868     0.02930634 Bul.R
CP'  
Change in Focus                :       0.000000                            0.000000 4|nQ=bIau  
Irregularity of surface 2 in fringes }0QN[$H!  
TIRR   2            -0.20000000     0.53400904    -0.01002330     0.20000000     0.55360281     0.00957047 _yj1:TtCNT  
Change in Focus                :       0.000000                            0.000000 !\CG,Ek  
Irregularity of surface 3 in fringes 3brb*gI_b  
TIRR   3            -0.20000000     0.58078982     0.03675748     0.20000000     0.49904394    -0.04498840 G%a] j  
Change in Focus                :       0.000000                            0.000000 kg<P t >  
Index tolerance on surface 1 $+Vmw
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TIND   1            -0.00100000     0.52606778    -0.01796456     0.00100000     0.56121811     0.01718578 }6).|^]\'  
Change in Focus                :       0.000000                            0.000000 QhsMd-v  
Index tolerance on surface 2 @]f3|>I  
TIND   2            -0.00100000     0.55639086     0.01235852     0.00100000     0.53126361    -0.01276872 |GtY*
|  
Change in Focus                :       0.000000                           -0.000000 %N)e91wC  
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Worst offenders: CoU3S,;*  
Type                      Value      Criterion        Change A2y6UzLYD  
TSTY   2            -0.20000000     0.35349910    -0.19053324 eUt=n)*`  
TSTY   2             0.20000000     0.35349910    -0.19053324 +UzXN
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TSTX   2            -0.20000000     0.35349910    -0.19053324 4E
2yH6l  
TSTX   2             0.20000000     0.35349910    -0.19053324 OU!nN>ln  
TSTY   1            -0.20000000     0.42678383    -0.11724851 8O6_iGTBh  
TSTY   1             0.20000000     0.42678383    -0.11724851 {O)YwT$`  
TSTX   1            -0.20000000     0.42678383    -0.11724851 %y>+1hakkX  
TSTX   1             0.20000000     0.42678383    -0.11724851 u?F (1iN=  
TSTY   3            -0.20000000     0.42861670    -0.11541563 20aZI2sk`  
TSTY   3             0.20000000     0.42861670    -0.11541563 XYjcJ  
^]6M["d/p  
Estimated Performance Changes based upon Root-Sum-Square method: RU0i#suiz  
Nominal MTF                 :     0.54403234 Uo2+:p  
Estimated change            :    -0.36299231 V
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Estimated MTF               :     0.18104003 vQ 4}WtvA  
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Compensator Statistics: OkpwhkPL5  
Change in back focus: Vo,[EVL  
Minimum            :        -0.000000 'w(y J  
Maximum            :         0.000000 # :#M{1I  
Mean               :        -0.000000 "V4Q2T T  
Standard Deviation :         0.000000 NPm;  
/s:w^g~  
Monte Carlo Analysis: gE\b982  
Number of trials: 20 !EOQhh  
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Initial Statistics: Normal Distribution MTb,Kmw<(  
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  Trial       Criterion        Change +Q)ULnie e  
      1     0.42804416    -0.11598818 D+sQPymI  
Change in Focus                :      -0.400171 TnNWO+kg  
      2     0.54384387    -0.00018847 f2yq8/J8.  
Change in Focus                :       1.018470 GAw(mH*  
      3     0.44510003    -0.09893230 ?`"n3!>bS  
Change in Focus                :      -0.601922 #{$1z;i?f  
      4     0.18154684    -0.36248550 *YtB )6j  
Change in Focus                :       0.920681 ;L~p|sF  
      5     0.28665820    -0.25737414 URA0ey`  
Change in Focus                :       1.253875 K
lN/\N\  
      6     0.21263372    -0.33139862 :"<e0wDu[  
Change in Focus                :      -0.903878 @QdnjX
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      7     0.40051424    -0.14351809 l4vTU=  
Change in Focus                :      -1.354815 *%\mZ,s"  
      8     0.48754161    -0.05649072 2no$+4+z  
Change in Focus                :       0.215922 "_< 9PM1t  
      9     0.40357468    -0.14045766 r|G
Y]9  
Change in Focus                :       0.281783 bO3GVc+S  
     10     0.26315315    -0.28087919 sb^mLH] 3  
Change in Focus                :      -1.048393 7+nm31,<O  
     11     0.26120585    -0.28282649 2.-o@im0  
Change in Focus                :       1.017611 |0sPka/u16  
     12     0.24033815    -0.30369419 "3fBY\>
a  
Change in Focus                :      -0.109292 [Atc "X$  
     13     0.37164046    -0.17239188 A&zS'toU  
Change in Focus                :      -0.692430 0{+.H_f`  
     14     0.48597489    -0.05805744 Nxk(mec"  
Change in Focus                :      -0.662040 _c2WqQ-05  
     15     0.21462327    -0.32940907 6e
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Change in Focus                :       1.611296 ~_
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     16     0.43378226    -0.11025008  $dQIs:  
Change in Focus                :      -0.640081 gEwd &J  
     17     0.39321881    -0.15081353 VUtXxvH  
Change in Focus                :       0.914906 0[xpEiDx  
     18     0.20692530    -0.33710703 &|9.}Z8U  
Change in Focus                :       0.801607 /_t|Dry015  
     19     0.51374068    -0.03029165 lp
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Change in Focus                :       0.947293 w0w1PE-V=  
     20     0.38013374    -0.16389860 bg
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Change in Focus                :       0.667010 3mO;JXd  
wL}l`fRB  
Number of traceable Monte Carlo files generated: 20 R)5n 8  
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Nominal     0.54403234 /,s[#J  
Best        0.54384387    Trial     2 L',mKOej  
Worst       0.18154684    Trial     4 0uvzxmN  
Mean        0.35770970 ZmEEj-*7s  
Std Dev     0.11156454 MHi8E9_O  
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SA;#aj}rV  
Compensator Statistics: S($Su7g%_  
Change in back focus: s?rBE.g@}  
Minimum            :        -1.354815 0w=R_C)
s  
Maximum            :         1.611296 F;q#&  
Mean               :         0.161872 lg$zGa?  
Standard Deviation :         0.869664 % 0T+t.  
F$V/K&&W  
90% >       0.20977951               ^oM|<";!?D  
80% >       0.22748071               !w39FfU{  
50% >       0.38667627               YA:nOvd@O  
20% >       0.46553746               ~" i0x
 
10% >       0.50064115                r
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9?<{_'  
End of Run. pkgjTXR2b  
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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 V~@^`Gd  

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 Wb}c=hZv  
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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                 ]vWKR."4  
80% >       0.22748071                 (8.Z..PH  
50% >       0.38667627                 -K9c@?  
20% >       0.46553746                 tg]x0#@s  
10% >       0.50064115 Bp8'pj;~  
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最后这个数值是MTF值呢，还是MTF的公差？ y{dTp  
@=}YTtq  
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？？？   z9FfU  
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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  : <sBbT
`  
90% >       0.20977951                 %J+E/  
80% >       0.22748071                 <g"{Wv: h  
50% >       0.38667627                 e)d`pQ6  
20% >       0.46553746                 &L=suDe  
10% >       0.50064115 Dfmjw  
....... %nf6%
@s  

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这些数值都是MTF值

Criterion           : Geometric MTF average S&T at 30.0000 cycles per mm   !|^|,"A)  
Mode                : Sensitivities ,o86}6Ag  
Sampling            : 2 vS;RJg=  
Nominal Criterion   : 0.54403234 k\5c|Wq|g  
Test Wavelength     : 0.6328 z&zP)>Pv  
,E S0NA  
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？ y%"{I7
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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