[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 R-k
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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 T0o0_R  
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图片:2.jpg

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然后运行分析的结果如下： 8qUNh#  
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Analysis of Tolerances bz`rSp8h  
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File : E:\光学设计资料\zemax练习\f500.ZMX S""F58H n  
Title: 94lz?-j  
Date : TUE JUN 21 2011 y=}o|/5"
 
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Units are Millimeters. ~kI$8oAry  
All changes are computed using linear differences. ;IT'6m`@W  
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Paraxial Focus compensation only. Rf!$n7& \  
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WARNING: Solves should be removed prior to tolerancing. e=ry_@7  
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Mnemonics: LO,:k+&A+  
TFRN: Tolerance on curvature in fringes. Dyj>dh-  
TTHI: Tolerance on thickness. o}L\b,])  
TSDX: Tolerance on surface decentering in x. rL/H{.@$`  
TSDY: Tolerance on surface decentering in y. [n$6T  
TSTX: Tolerance on surface tilt in x (degrees). :>3?|Z"Aj  
TSTY: Tolerance on surface tilt in y (degrees). !dwa. lZ&X  
TIRR: Tolerance on irregularity (fringes). M ~6$kT  
TIND: Tolerance on Nd index of refraction. u y13SkW  
TEDX: Tolerance on element decentering in x. /!pJ"@  
TEDY: Tolerance on element decentering in y. % 3<7HY]~  
TETX: Tolerance on element tilt in x (degrees). cJ'OqV F  
TETY: Tolerance on element tilt in y (degrees). -]Aqt/w"l  
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WARNING: RAY AIMING IS OFF. Very loose tolerances may not be computed accurately. ufocj1IU  
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WARNING: Boundary constraints on compensators will be ignored. ZtX CPA!  
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Criterion           : Geometric MTF average S&T at 30.0000 cycles per mm UYhxgPGsj  
Mode                : Sensitivities WIw*//nw  
Sampling            : 2 R|]n;*y  
Nominal Criterion   : 0.54403234 rw[Ioyr-  
Test Wavelength     : 0.6328 !9_'_8  
sE[ Yg8yAt  
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Fields: XY Symmetric Angle in degrees qTe@?j  
#      X-Field      Y-Field       Weight    VDX    VDY    VCX    VCY #j)"#1IE2W  
1   0.000E+000   0.000E+000   1.000E+000  0.000  0.000  0.000  0.000 6>z,7 [  
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Sensitivity Analysis: <4582x,G  
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                 |----------------- Minimum ----------------| |----------------- Maximum ----------------| k&17 (Tv$  
Type                      Value      Criterion        Change          Value      Criterion        Change \q^:$iY~  
Fringe tolerance on surface 1 mB"1QtD  
TFRN   1            -1.00000000     0.54257256    -0.00145977     1.00000000     0.54548607     0.00145374 "6Z(0 iu:{  
Change in Focus                :      -0.000000                            0.000000 i ;^Ya  
Fringe tolerance on surface 2 \jx3Fs:Q  
TFRN   2            -1.00000000     0.54177471    -0.00225762     1.00000000     0.54627463     0.00224230 q`UaJ_7  
Change in Focus                :       0.000000                            0.000000 IRTD(7"oyp  
Fringe tolerance on surface 3 I:("f+ H  
TFRN   3            -1.00000000     0.54779866     0.00376632     1.00000000     0.54022572    -0.00380662 ^,aI2vC  
Change in Focus                :      -0.000000                            0.000000 W:K'2j  
Thickness tolerance on surface 1 OsKtxtLO  
TTHI   1   3        -0.20000000     0.54321462    -0.00081772     0.20000000     0.54484759     0.00081525 P~%+K
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Change in Focus                :       0.000000                            0.000000 M~~)tJYsu  
Thickness tolerance on surface 2 }b/P\1#z  
TTHI   2   3        -0.20000000     0.54478712     0.00075478     0.20000000     0.54327558    -0.00075675 ~0@fK<C)O  
Change in Focus                :       0.000000                           -0.000000 }_5R9w]"  
Decenter X tolerance on surfaces 1 through 3 mi[8O$^iJ  
TEDX   1   3        -0.20000000     0.54401464   -1.7700E-005     0.20000000     0.54401464   -1.7700E-005 Hz)i.
AA 4  
Change in Focus                :       0.000000                            0.000000 ^b.#4i(v  
Decenter Y tolerance on surfaces 1 through 3 +}PN+:yV  
TEDY   1   3        -0.20000000     0.54401464   -1.7700E-005     0.20000000     0.54401464   -1.7700E-005 +wf9!_'  
Change in Focus                :       0.000000                            0.000000 Sa kew  
Tilt X tolerance on surfaces 1 through 3 (degrees) |gIE$rt-~W  
TETX   1   3        -0.20000000     0.54897548     0.00494314     0.20000000     0.54897548     0.00494314 _*MK"  
Change in Focus                :       0.000000                            0.000000 X-#&]^d  
Tilt Y tolerance on surfaces 1 through 3 (degrees) lqKj;'  
TETY   1   3        -0.20000000     0.54897548     0.00494314     0.20000000     0.54897548     0.00494314 e['<.Yf+  
Change in Focus                :       0.000000                            0.000000 MpBdke$  
Decenter X tolerance on surface 1 ,~DV0#"  
TSDX   1            -0.20000000     0.53999563    -0.00403671     0.20000000     0.53999563    -0.00403671 ~clX2U8u`  
Change in Focus                :       0.000000                            0.000000 9g>)7Ne  
Decenter Y tolerance on surface 1 -$DfnAh  
TSDY   1            -0.20000000     0.53999563    -0.00403671     0.20000000     0.53999563    -0.00403671 6)7cw8^  
Change in Focus                :       0.000000                            0.000000 5OzEY7K)  
Tilt X tolerance on surface (degrees) 1 ,Aai-AGG@  
TSTX   1            -0.20000000     0.42678383    -0.11724851     0.20000000     0.42678383    -0.11724851 <fM}Kk  
Change in Focus                :       0.000000                            0.000000 {
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Tilt Y tolerance on surface (degrees) 1 7eju%d  
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 y.c6r> }  
Decenter X tolerance on surface 2 -0x Q'1I  
TSDX   2            -0.20000000     0.51705427    -0.02697807     0.20000000     0.51705427    -0.02697807 ^6z"@+;*  
Change in Focus                :       0.000000                            0.000000 1^^8
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Decenter Y tolerance on surface 2 %1.F;-GdsW  
TSDY   2            -0.20000000     0.51705427    -0.02697807     0.20000000     0.51705427    -0.02697807 I<ohh`.  
Change in Focus                :       0.000000                            0.000000 )*>wa%[-q  
Tilt X tolerance on surface (degrees) 2 -v.\W y~\  
TSTX   2            -0.20000000     0.35349910    -0.19053324     0.20000000     0.35349910    -0.19053324 JE7m5kTa  
Change in Focus                :       0.000000                            0.000000 [&PF ;)i  
Tilt Y tolerance on surface (degrees) 2 PXkpttIE]M  
TSTY   2            -0.20000000     0.35349910    -0.19053324     0.20000000     0.35349910    -0.19053324 e-`.Ht  
Change in Focus                :       0.000000                            0.000000 PPr Pj^%z=  
Decenter X tolerance on surface 3  2Y23!hw  
TSDX   3            -0.20000000     0.53419039    -0.00984195     0.20000000     0.53419039    -0.00984195 t4[q:[1  
Change in Focus                :       0.000000                            0.000000 Xt<1b
 
Decenter Y tolerance on surface 3 4,z|hY_*t  
TSDY   3            -0.20000000     0.53419039    -0.00984195     0.20000000     0.53419039    -0.00984195 Y=O+d\_W  
Change in Focus                :       0.000000                            0.000000 q.`<q  
Tilt X tolerance on surface (degrees) 3 .R)P |@z L  
TSTX   3            -0.20000000     0.42861670    -0.11541563     0.20000000     0.42861670    -0.11541563 $Dj8 a\L  
Change in Focus                :       0.000000                            0.000000 $t.oGd@N  
Tilt Y tolerance on surface (degrees) 3 in<.0v9w  
TSTY   3            -0.20000000     0.42861670    -0.11541563     0.20000000     0.42861670    -0.11541563 A}(]J!rc  
Change in Focus                :       0.000000                            0.000000 >5Yn`Fc5  
Irregularity of surface 1 in fringes 'E3T fM  
TIRR   1            -0.20000000     0.50973587    -0.03429647     0.20000000     0.57333868     0.02930634 P'lnS&yA  
Change in Focus                :       0.000000                            0.000000 gZ$ 8Y7  
Irregularity of surface 2 in fringes '7sf)0\:<p  
TIRR   2            -0.20000000     0.53400904    -0.01002330     0.20000000     0.55360281     0.00957047 mG&A_/e!9  
Change in Focus                :       0.000000                            0.000000 E5n7 <
 
Irregularity of surface 3 in fringes RTcxZ/\"#  
TIRR   3            -0.20000000     0.58078982     0.03675748     0.20000000     0.49904394    -0.04498840 I"88O4\@  
Change in Focus                :       0.000000                            0.000000 )bOfs*S  
Index tolerance on surface 1 :}zyd;Rc  
TIND   1            -0.00100000     0.52606778    -0.01796456     0.00100000     0.56121811     0.01718578 g2|Myz)  
Change in Focus                :       0.000000                            0.000000 s Z[[ymu8  
Index tolerance on surface 2 V2Vr7v=Y"  
TIND   2            -0.00100000     0.55639086     0.01235852     0.00100000     0.53126361    -0.01276872 =#V^t$  
Change in Focus                :       0.000000                           -0.000000 \Mg_Q$  
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Worst offenders: 3}fOb  
Type                      Value      Criterion        Change ?7aZU  
TSTY   2            -0.20000000     0.35349910    -0.19053324 P"_/P8  
TSTY   2             0.20000000     0.35349910    -0.19053324 q
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TSTX   2            -0.20000000     0.35349910    -0.19053324 oZvG Kf
 
TSTX   2             0.20000000     0.35349910    -0.19053324 {JgY-#R?{(  
TSTY   1            -0.20000000     0.42678383    -0.11724851 '[{<aEo  
TSTY   1             0.20000000     0.42678383    -0.11724851 ^?VQ$o2  
TSTX   1            -0.20000000     0.42678383    -0.11724851 y!#-[K:  
TSTX   1             0.20000000     0.42678383    -0.11724851 1|MRXK  
TSTY   3            -0.20000000     0.42861670    -0.11541563 @L3XBV2  
TSTY   3             0.20000000     0.42861670    -0.11541563 t WI-  
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Estimated Performance Changes based upon Root-Sum-Square method: arYq$~U  
Nominal MTF                 :     0.54403234 ,;`f* #  
Estimated change            :    -0.36299231 @j/2 $  
Estimated MTF               :     0.18104003 }D#:NlMp  
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Compensator Statistics: pE5v~~9Ikv  
Change in back focus: &xnQLz:#  
Minimum            :        -0.000000 3kn-tM  
Maximum            :         0.000000 \vA*dQ-  
Mean               :        -0.000000 N6Mr#A-{  
Standard Deviation :         0.000000 <u64)8'  
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Monte Carlo Analysis: %2\Hj0JQQ  
Number of trials: 20 uZ+bo&  
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Initial Statistics: Normal Distribution 23}` e  
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  Trial       Criterion        Change :"%/u9<A  
      1     0.42804416    -0.11598818 g>lZs  
Change in Focus                :      -0.400171 '2(m
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      2     0.54384387    -0.00018847 t3;Zx+Br  
Change in Focus                :       1.018470 XiW1X6  
      3     0.44510003    -0.09893230 /(dP)ysc  
Change in Focus                :      -0.601922 vF72#BNs  
      4     0.18154684    -0.36248550 Vj*-E  
Change in Focus                :       0.920681 I?e5h@uE  
      5     0.28665820    -0.25737414 1JJs
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Change in Focus                :       1.253875 $L
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      6     0.21263372    -0.33139862 `w@:h4f  
Change in Focus                :      -0.903878 ]VI^
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      7     0.40051424    -0.14351809 &2tfj(ms  
Change in Focus                :      -1.354815 4E$MhP  
      8     0.48754161    -0.05649072 S=UuEmU5N  
Change in Focus                :       0.215922 f"MID6  
      9     0.40357468    -0.14045766 ":!$Jnj,  
Change in Focus                :       0.281783 v3-/ [-XB:  
     10     0.26315315    -0.28087919 xTHD_?d  
Change in Focus                :      -1.048393 SI7rTJ]/  
     11     0.26120585    -0.28282649 LF dvz0  
Change in Focus                :       1.017611 &G{GLP?H  
     12     0.24033815    -0.30369419 !]4u"e  
Change in Focus                :      -0.109292 pKSCC"i&j  
     13     0.37164046    -0.17239188 MxE]EJZ  
Change in Focus                :      -0.692430
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     14     0.48597489    -0.05805744 wi2`5G6|z  
Change in Focus                :      -0.662040 i)i>Ulj*i  
     15     0.21462327    -0.32940907 :'%6
  
Change in Focus                :       1.611296 u64#,mC[*  
     16     0.43378226    -0.11025008 cO?*(e1m=  
Change in Focus                :      -0.640081 k/K)nH@)  
     17     0.39321881    -0.15081353 2#wnJdr6E  
Change in Focus                :       0.914906 u6|C3,!z"  
     18     0.20692530    -0.33710703 8_Oeui(i  
Change in Focus                :       0.801607 hx$]fvDevD  
     19     0.51374068    -0.03029165 }M07-qIX{  
Change in Focus                :       0.947293 g6M>S1oOO  
     20     0.38013374    -0.16389860 3",gjXmBu  
Change in Focus                :       0.667010 'Ru(`" 1|  
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Number of traceable Monte Carlo files generated: 20 UHl3/m7g  
Iiy5;:CX:q  
Nominal     0.54403234 l+ }=D@l  
Best        0.54384387    Trial     2 PGTEIptX7  
Worst       0.18154684    Trial     4 TKZtoQP%  
Mean        0.35770970 F`D$bE;|  
Std Dev     0.11156454 F^dJ{<yX  
zIa={tU  
[LVXXjkFI  
Compensator Statistics: VG5+u,U6>  
Change in back focus: /~LE1^1&U  
Minimum            :        -1.354815 )5|9EXh  
Maximum            :         1.611296 {&1L &f<  
Mean               :         0.161872 O8;/oL4 U  
Standard Deviation :         0.869664 a;o0#I#Si  
. ,|C>^  
90% >       0.20977951               .6y+van  
80% >       0.22748071               2Zu9? L ,I  
50% >       0.38667627               r-qe7K@p  
20% >       0.46553746               1W|jC  
10% >       0.50064115                F^l1WX6  
#*(}%!rD*  
End of Run. -%fQr5  
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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 }Rh\JDiQ  

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 45~x #Q  
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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                 s%:fZ7y  
80% >       0.22748071                 -[=~!Qr:  
50% >       0.38667627                 J?O0ixU  
20% >       0.46553746                 [=K lDfU=  
10% >       0.50064115 V\`Z|'WIQD  
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最后这个数值是MTF值呢，还是MTF的公差？ J*;RL`  
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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？？？   2+9VDf2  
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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  : 6)1PDlB  
90% >       0.20977951                 _WNbuk0  
80% >       0.22748071                 OP\jO DX  
50% >       0.38667627                 -Mr_Ao`E  
20% >       0.46553746                 45 ^ Z5t  
10% >       0.50064115 G/JGb2I/7|  
....... z6w'XA1_+t  

b"$?(Y  
, >WH)+a  
这些数值都是MTF值

Criterion           : Geometric MTF average S&T at 30.0000 cycles per mm   (87wWhH  
Mode                : Sensitivities W^09tx/I  
Sampling            : 2 >h8m8J  
Nominal Criterion   : 0.54403234 Mo@{1K/9  
Test Wavelength     : 0.6328 \j!/l f)  
D,=~7/g  
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？ +h-% {  
Uy=yA  
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