[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 ~'KqiUY  
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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 ""a$[[ %WC  
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图片:2.jpg

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然后运行分析的结果如下：
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Analysis of Tolerances B6k<#-HAT  
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File : E:\光学设计资料\zemax练习\f500.ZMX 'u;O2$  
Title: &k%>u[Bo  
Date : TUE JUN 21 2011 bNVeL$'  
!=,Y=5M,  
Units are Millimeters. tOLcnWt   
All changes are computed using linear differences. BB(6[V"SV  
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Paraxial Focus compensation only. w"s@q$}]8M  
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WARNING: Solves should be removed prior to tolerancing. a~$Y;C_#<  
Lm2)3;ei  
Mnemonics: 5HV+7zU5  
TFRN: Tolerance on curvature in fringes. ~<n.5q%Z  
TTHI: Tolerance on thickness. 3}8o 9  
TSDX: Tolerance on surface decentering in x. DI
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TSDY: Tolerance on surface decentering in y. Q'jw=w!|g  
TSTX: Tolerance on surface tilt in x (degrees). t'Wv?,  
TSTY: Tolerance on surface tilt in y (degrees). @|vH5Pi  
TIRR: Tolerance on irregularity (fringes). {XmCG%%L  
TIND: Tolerance on Nd index of refraction. 71{jedT  
TEDX: Tolerance on element decentering in x.  |50sGJE(  
TEDY: Tolerance on element decentering in y. :1>?:3,`  
TETX: Tolerance on element tilt in x (degrees). 3^+D,)#D^  
TETY: Tolerance on element tilt in y (degrees). V&s|IoTR  
<4q H0<  
WARNING: RAY AIMING IS OFF. Very loose tolerances may not be computed accurately. src+z#  
Fds 11 /c7  
WARNING: Boundary constraints on compensators will be ignored. 6~x'~T  
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Criterion           : Geometric MTF average S&T at 30.0000 cycles per mm \xCCJWek  
Mode                : Sensitivities ^x: lB>  
Sampling            : 2 ~$g:  
Nominal Criterion   : 0.54403234 kygw}|, N  
Test Wavelength     : 0.6328 zR^Gy"  
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L!If~6oD(  
Fields: XY Symmetric Angle in degrees sE6>JaH  
#      X-Field      Y-Field       Weight    VDX    VDY    VCX    VCY
F^NK"<tW  
1   0.000E+000   0.000E+000   1.000E+000  0.000  0.000  0.000  0.000 SscB&{f  
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Sensitivity Analysis: D![v{0er  
W-n4wIj"  
                 |----------------- Minimum ----------------| |----------------- Maximum ----------------| Ec@n<KK#  
Type                      Value      Criterion        Change          Value      Criterion        Change p2i?)+z  
Fringe tolerance on surface 1 WYUDD_m  
TFRN   1            -1.00000000     0.54257256    -0.00145977     1.00000000     0.54548607     0.00145374 Q,&Li+u|  
Change in Focus                :      -0.000000                            0.000000 RDp  
Fringe tolerance on surface 2 0<-E)\:[g  
TFRN   2            -1.00000000     0.54177471    -0.00225762     1.00000000     0.54627463     0.00224230 bItcF$#!!!  
Change in Focus                :       0.000000                            0.000000 zl|z4j'Irc  
Fringe tolerance on surface 3 J{1H$[W~}  
TFRN   3            -1.00000000     0.54779866     0.00376632     1.00000000     0.54022572    -0.00380662 Y"GNJtsL"  
Change in Focus                :      -0.000000                            0.000000 qJrT  
Thickness tolerance on surface 1 j )6  
TTHI   1   3        -0.20000000     0.54321462    -0.00081772     0.20000000     0.54484759     0.00081525 #_wq#rF  
Change in Focus                :       0.000000                            0.000000 :
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Thickness tolerance on surface 2 ){5Nod{}a  
TTHI   2   3        -0.20000000     0.54478712     0.00075478     0.20000000     0.54327558    -0.00075675 LKu\Mh|  
Change in Focus                :       0.000000                           -0.000000 "%gsGtS  
Decenter X tolerance on surfaces 1 through 3 56 3mz-  
TEDX   1   3        -0.20000000     0.54401464   -1.7700E-005     0.20000000     0.54401464   -1.7700E-005 `GCoi ?n7  
Change in Focus                :       0.000000                            0.000000 rGyAzL]  
Decenter Y tolerance on surfaces 1 through 3 YB5"i9T2  
TEDY   1   3        -0.20000000     0.54401464   -1.7700E-005     0.20000000     0.54401464   -1.7700E-005 6QX m]<  
Change in Focus                :       0.000000                            0.000000 go uU  
Tilt X tolerance on surfaces 1 through 3 (degrees) J+u}uN@  
TETX   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 v3I^81  
Tilt Y tolerance on surfaces 1 through 3 (degrees) e"nm<&  
TETY   1   3        -0.20000000     0.54897548     0.00494314     0.20000000     0.54897548     0.00494314 FPDTw8" B;  
Change in Focus                :       0.000000                            0.000000 [>O!~  
Decenter X tolerance on surface 1 *9aJZWf>V  
TSDX   1            -0.20000000     0.53999563    -0.00403671     0.20000000     0.53999563    -0.00403671  p+h$]CH  
Change in Focus                :       0.000000                            0.000000 mH'~pR>t  
Decenter Y tolerance on surface 1
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TSDY   1            -0.20000000     0.53999563    -0.00403671     0.20000000     0.53999563    -0.00403671 f~`=I NrU  
Change in Focus                :       0.000000                            0.000000 uZ!YGv0^  
Tilt X tolerance on surface (degrees) 1 hy5[ L`B  
TSTX   1            -0.20000000     0.42678383    -0.11724851     0.20000000     0.42678383    -0.11724851 -b(DPte  
Change in Focus                :       0.000000                            0.000000 to'7o8Z  
Tilt Y tolerance on surface (degrees) 1 u5(8k_
7  
TSTY   1            -0.20000000     0.42678383    -0.11724851     0.20000000     0.42678383    -0.11724851 wGc7  
Change in Focus                :       0.000000                            0.000000 ?l0eU@rwQ  
Decenter X tolerance on surface 2 x#>V50E  
TSDX   2            -0.20000000     0.51705427    -0.02697807     0.20000000     0.51705427    -0.02697807 NBYJ'nA%;f  
Change in Focus                :       0.000000                            0.000000 +xFn~b/  
Decenter Y tolerance on surface 2 Lgg
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TSDY   2            -0.20000000     0.51705427    -0.02697807     0.20000000     0.51705427    -0.02697807 CJ IuMsZ  
Change in Focus                :       0.000000                            0.000000 zR"cj  
Tilt X tolerance on surface (degrees) 2 ANM#Kx+  
TSTX   2            -0.20000000     0.35349910    -0.19053324     0.20000000     0.35349910    -0.19053324 nI\6aG?`  
Change in Focus                :       0.000000                            0.000000 -K64J5|b7  
Tilt Y tolerance on surface (degrees) 2 2r, c{Ah@D  
TSTY   2            -0.20000000     0.35349910    -0.19053324     0.20000000     0.35349910    -0.19053324 #Iw(+%
D  
Change in Focus                :       0.000000                            0.000000 4
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Decenter X tolerance on surface 3 mlnF,+s  
TSDX   3            -0.20000000     0.53419039    -0.00984195     0.20000000     0.53419039    -0.00984195 3 jZMXEG)  
Change in Focus                :       0.000000                            0.000000 k?+ 7%A]  
Decenter Y tolerance on surface 3 R6+)&:Ab{R  
TSDY   3            -0.20000000     0.53419039    -0.00984195     0.20000000     0.53419039    -0.00984195  Aqyw  
Change in Focus                :       0.000000                            0.000000 j/O~8o&  
Tilt X tolerance on surface (degrees) 3 :GXF=Df  
TSTX   3            -0.20000000     0.42861670    -0.11541563     0.20000000     0.42861670    -0.11541563 =@HS  
Change in Focus                :       0.000000                            0.000000 a+w2cN'  
Tilt Y tolerance on surface (degrees) 3 6Y9N=\`  
TSTY   3            -0.20000000     0.42861670    -0.11541563     0.20000000     0.42861670    -0.11541563 No^gKh24  
Change in Focus                :       0.000000                            0.000000 Nd~B$venh  
Irregularity of surface 1 in fringes X0lPRk53(  
TIRR   1            -0.20000000     0.50973587    -0.03429647     0.20000000     0.57333868     0.02930634 V(MYReaPC]  
Change in Focus                :       0.000000                            0.000000 ,i2-  
Irregularity of surface 2 in fringes [jMN*p?  
TIRR   2            -0.20000000     0.53400904    -0.01002330     0.20000000     0.55360281     0.00957047 xE/?ncTK^  
Change in Focus                :       0.000000                            0.000000 qX\*lm/l  
Irregularity of surface 3 in fringes Fc~G*Gz~Z|  
TIRR   3            -0.20000000     0.58078982     0.03675748     0.20000000     0.49904394    -0.04498840 SH%NYjj  
Change in Focus                :       0.000000                            0.000000 O=B=0  
Index tolerance on surface 1 0HzqU31%l@  
TIND   1            -0.00100000     0.52606778    -0.01796456     0.00100000     0.56121811     0.01718578 C8U3+ s  
Change in Focus                :       0.000000                            0.000000 `Ij@;=(  
Index tolerance on surface 2 k9Pvh,_wp  
TIND   2            -0.00100000     0.55639086     0.01235852     0.00100000     0.53126361    -0.01276872 @(t3<g  
Change in Focus                :       0.000000                           -0.000000 6d-\+t8  
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Worst offenders: |7qt/z  
Type                      Value      Criterion        Change .ZTvOm'mB^  
TSTY   2            -0.20000000     0.35349910    -0.19053324 E9:@H;Gc  
TSTY   2             0.20000000     0.35349910    -0.19053324 -$Oh.B`i  
TSTX   2            -0.20000000     0.35349910    -0.19053324 $R9D L^iD  
TSTX   2             0.20000000     0.35349910    -0.19053324 380`>"D  
TSTY   1            -0.20000000     0.42678383    -0.11724851 ^P)f]GQx  
TSTY   1             0.20000000     0.42678383    -0.11724851 "-~7lY%  
TSTX   1            -0.20000000     0.42678383    -0.11724851 [h/T IGE\  
TSTX   1             0.20000000     0.42678383    -0.11724851 B `(jTL  
TSTY   3            -0.20000000     0.42861670    -0.11541563 Y|>dS8f;4  
TSTY   3             0.20000000     0.42861670    -0.11541563 l/.{F;3F  
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Estimated Performance Changes based upon Root-Sum-Square method: -ss= c
#  
Nominal MTF                 :     0.54403234 w0Qtr>"  
Estimated change            :    -0.36299231 zF1!a  
Estimated MTF               :     0.18104003 uo9#(6
 
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Compensator Statistics: VD;*UkapZx  
Change in back focus: Un?
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Minimum            :        -0.000000 aJu&h2G  
Maximum            :         0.000000 d:=' Xs
 
Mean               :        -0.000000 ){^J8]b7#  
Standard Deviation :         0.000000 mQ"~x]  
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Monte Carlo Analysis: @X==[gQ  
Number of trials: 20 NR4+&d  
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Initial Statistics: Normal Distribution ~ao:9ynY  
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  Trial       Criterion        Change PX:#+bq1  
      1     0.42804416    -0.11598818 djd/QA
fSC  
Change in Focus                :      -0.400171 \DB-2*a"  
      2     0.54384387    -0.00018847 ]C_+u_9  
Change in Focus                :       1.018470 Cf% qa
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      3     0.44510003    -0.09893230 Aoe\\'O|V  
Change in Focus                :      -0.601922 kDmm  
      4     0.18154684    -0.36248550 I
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Change in Focus                :       0.920681 7J'%;sH  
      5     0.28665820    -0.25737414 0vY_  
Change in Focus                :       1.253875 2+1ybOwb  
      6     0.21263372    -0.33139862 inut'@=G/  
Change in Focus                :      -0.903878 I"Oq< _  
      7     0.40051424    -0.14351809 `4Yo-@iVP  
Change in Focus                :      -1.354815 ~?Zib1f)  
      8     0.48754161    -0.05649072 [doEArwn  
Change in Focus                :       0.215922 JZ5k3#@e  
      9     0.40357468    -0.14045766 ;mQj2Bwr  
Change in Focus                :       0.281783 xS*UY.>  
     10     0.26315315    -0.28087919 H$![]Ujq  
Change in Focus                :      -1.048393 9&+]YYCS-  
     11     0.26120585    -0.28282649 U4D7@KY +m  
Change in Focus                :       1.017611 "Q?+T:D8|  
     12     0.24033815    -0.30369419 .. `I<2  
Change in Focus                :      -0.109292 DiJLWXs  
     13     0.37164046    -0.17239188 -|>~I#vY  
Change in Focus                :      -0.692430 DAn2Pqf  
     14     0.48597489    -0.05805744 5EYG
A\  
Change in Focus                :      -0.662040 GppCrQ%Ra|  
     15     0.21462327    -0.32940907 {j2V k)\[i  
Change in Focus                :       1.611296 dCC*|b8h  
     16     0.43378226    -0.11025008 e~)[
I!n  
Change in Focus                :      -0.640081 \}Q=q$
)  
     17     0.39321881    -0.15081353 f"6W ;b2L.  
Change in Focus                :       0.914906 y`I>|5[`  
     18     0.20692530    -0.33710703 \YP,}_~  
Change in Focus                :       0.801607 (W1$+X  
     19     0.51374068    -0.03029165 4Aj~mA  
Change in Focus                :       0.947293 MN?aPpr>  
     20     0.38013374    -0.16389860 '$ei3  
Change in Focus                :       0.667010 @16GF!.  
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Number of traceable Monte Carlo files generated: 20 )Sn0Y B  
g=Xf&}&=x  
Nominal     0.54403234 f$I=oN  
Best        0.54384387    Trial     2 atL<mhRz  
Worst       0.18154684    Trial     4 0 QTI;3  
Mean        0.35770970 $n<a`PdH  
Std Dev     0.11156454 Yy*=@qu>g  
Ho &Q}<(  
g'.OzD  
Compensator Statistics: PTe L3L  
Change in back focus: n!)$e;l  
Minimum            :        -1.354815 BJ|l  
Maximum            :         1.611296  -WC0W  
Mean               :         0.161872 K[[~G1Z  
Standard Deviation :         0.869664 ON2o^-%=  
Hw \of  
90% >       0.20977951               t3<MoDe7`r  
80% >       0.22748071               2`o @L  
50% >       0.38667627               $ XjijD9R  
20% >       0.46553746               #&Hi0..y  
10% >       0.50064115                3h7RQ:lUi  
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End of Run. JR!-1tnc  
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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 U5Hi9fe  

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 .}==p
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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                 Y 9$jJ1V  
80% >       0.22748071                 Ohm{m^VD"  
50% >       0.38667627                 a_b#hM/c;  
20% >       0.46553746                 6 f*:;  
10% >       0.50064115 ]IV{;{E)  
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最后这个数值是MTF值呢，还是MTF的公差？ ;\K]~  
t3)6R(JC  
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？？？   FX!KX/OE)  
tVG;A&\,6  
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  : wQG?)aaM  
90% >       0.20977951                 !=eNr<:V.  
80% >       0.22748071                 GQYR`;>  
50% >       0.38667627                 iyn9[>j
e  
20% >       0.46553746                 U)G.Bst  
10% >       0.50064115 jfG of*  
....... JOuyEPy  

8?iI;(  
ah*{NR)  
这些数值都是MTF值

Criterion           : Geometric MTF average S&T at 30.0000 cycles per mm   AJ%E.+@=r  
Mode                : Sensitivities R%KF/1;/  
Sampling            : 2 A1/@KC"&{G  
Nominal Criterion   : 0.54403234 QdgJNT<=H,  
Test Wavelength     : 0.6328 @dv8 F "v  
2{?]W/&fS  
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？ d#E&,^@M  
GqHW.s5  
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