[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 QO0T<V  
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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 jRzR`>5  
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图片:2.jpg

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然后运行分析的结果如下： SxNs  
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Analysis of Tolerances _<&IpT{w+  
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File : E:\光学设计资料\zemax练习\f500.ZMX 9_oIAn:<  
Title: V\
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Date : TUE JUN 21 2011 Sw>AgES  
:43K)O"  
Units are Millimeters. \%f4)Qb  
All changes are computed using linear differences. o^2.&e+dQ  
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Paraxial Focus compensation only. sLPFeibof5  
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WARNING: Solves should be removed prior to tolerancing. }>fL{};Z"  
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Mnemonics: c(i-~_  
TFRN: Tolerance on curvature in fringes. O]90F  
TTHI: Tolerance on thickness. UPA))Iv>  
TSDX: Tolerance on surface decentering in x. 9["yL{IPe  
TSDY: Tolerance on surface decentering in y. E XEae?  
TSTX: Tolerance on surface tilt in x (degrees). /\(0@To  
TSTY: Tolerance on surface tilt in y (degrees). Q];+?Pu.  
TIRR: Tolerance on irregularity (fringes). 8}nA8J  
TIND: Tolerance on Nd index of refraction. P.=&:ay7?  
TEDX: Tolerance on element decentering in x. \,oT(p4N%M  
TEDY: Tolerance on element decentering in y. ;VNwx(1l`  
TETX: Tolerance on element tilt in x (degrees). 79z(n[^  
TETY: Tolerance on element tilt in y (degrees). +(QGlRd  
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WARNING: RAY AIMING IS OFF. Very loose tolerances may not be computed accurately. -aXV}ZY"  
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WARNING: Boundary constraints on compensators will be ignored. Kw+?Lowp  
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Criterion           : Geometric MTF average S&T at 30.0000 cycles per mm ;XRLp:y  
Mode                : Sensitivities \M'b%  
Sampling            : 2 #92:h6  
Nominal Criterion   : 0.54403234 <G/O!02  
Test Wavelength     : 0.6328 !i2=zlpb[  
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Fields: XY Symmetric Angle in degrees z<hy#BIjnd  
#      X-Field      Y-Field       Weight    VDX    VDY    VCX    VCY ZOi8)Y~  
1   0.000E+000   0.000E+000   1.000E+000  0.000  0.000  0.000  0.000
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Sensitivity Analysis: h1:uTrtA  
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                 |----------------- Minimum ----------------| |----------------- Maximum ----------------| IF(W[J  
Type                      Value      Criterion        Change          Value      Criterion        Change Yy@;
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Fringe tolerance on surface 1 w$u=_  
TFRN   1            -1.00000000     0.54257256    -0.00145977     1.00000000     0.54548607     0.00145374 :w_Zr5H]  
Change in Focus                :      -0.000000                            0.000000 s 'u6Ep/V  
Fringe tolerance on surface 2 j]6Z*AxQ  
TFRN   2            -1.00000000     0.54177471    -0.00225762     1.00000000     0.54627463     0.00224230 ![18+Q\  
Change in Focus                :       0.000000                            0.000000 SL? ! RQ  
Fringe tolerance on surface 3  e%afK@c  
TFRN   3            -1.00000000     0.54779866     0.00376632     1.00000000     0.54022572    -0.00380662 1>[3(o3t  
Change in Focus                :      -0.000000                            0.000000 m1heU3BUWU  
Thickness tolerance on surface 1 kS%FV;9>(  
TTHI   1   3        -0.20000000     0.54321462    -0.00081772     0.20000000     0.54484759     0.00081525 G!C2[:[g  
Change in Focus                :       0.000000                            0.000000 u`xmF/jhQ  
Thickness tolerance on surface 2 !vHnMY~AG  
TTHI   2   3        -0.20000000     0.54478712     0.00075478     0.20000000     0.54327558    -0.00075675 yNoJrA  
Change in Focus                :       0.000000                           -0.000000 pn{Mj  
Decenter X tolerance on surfaces 1 through 3 *!ZU"q}i  
TEDX   1   3        -0.20000000     0.54401464   -1.7700E-005     0.20000000     0.54401464   -1.7700E-005 pLE|#58I  
Change in Focus                :       0.000000                            0.000000 zQMsS  
Decenter Y tolerance on surfaces 1 through 3 y+)][Wa0  
TEDY   1   3        -0.20000000     0.54401464   -1.7700E-005     0.20000000     0.54401464   -1.7700E-005 )O#]Wvr  
Change in Focus                :       0.000000                            0.000000 Zz'(!h Uy  
Tilt X tolerance on surfaces 1 through 3 (degrees)
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TETX   1   3        -0.20000000     0.54897548     0.00494314     0.20000000     0.54897548     0.00494314 MMqkNe  
Change in Focus                :       0.000000                            0.000000 {OL*E0  
Tilt Y tolerance on surfaces 1 through 3 (degrees) vQ#$.*Cvn  
TETY   1   3        -0.20000000     0.54897548     0.00494314     0.20000000     0.54897548     0.00494314 gLa#y  
Change in Focus                :       0.000000                            0.000000 x$Ko
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Decenter X tolerance on surface 1 Mc#uWmc 7
 
TSDX   1            -0.20000000     0.53999563    -0.00403671     0.20000000     0.53999563    -0.00403671 |FHeT*"  
Change in Focus                :       0.000000                            0.000000 sU^2I v\%  
Decenter Y tolerance on surface 1 UeIu -[R  
TSDY   1            -0.20000000     0.53999563    -0.00403671     0.20000000     0.53999563    -0.00403671 hPE#l?H@A  
Change in Focus                :       0.000000                            0.000000 Ok/~E  
Tilt X tolerance on surface (degrees) 1 @Y 1iEL%\y  
TSTX   1            -0.20000000     0.42678383    -0.11724851     0.20000000     0.42678383    -0.11724851 AyB-+oTf(  
Change in Focus                :       0.000000                            0.000000 9<I@}w  
Tilt Y tolerance on surface (degrees) 1 QXY-?0RO#  
TSTY   1            -0.20000000     0.42678383    -0.11724851     0.20000000     0.42678383    -0.11724851 #oSQWC=T  
Change in Focus                :       0.000000                            0.000000 G"T)+!6t  
Decenter X tolerance on surface 2 PspH[db  
TSDX   2            -0.20000000     0.51705427    -0.02697807     0.20000000     0.51705427    -0.02697807 Qw!cd-zc  
Change in Focus                :       0.000000                            0.000000 ^>gRK*,  
Decenter Y tolerance on surface 2 p+SFeUp  
TSDY   2            -0.20000000     0.51705427    -0.02697807     0.20000000     0.51705427    -0.02697807 nyWA(%N1  
Change in Focus                :       0.000000                            0.000000 %6j|/|#]  
Tilt X tolerance on surface (degrees) 2 odMjxWY  
TSTX   2            -0.20000000     0.35349910    -0.19053324     0.20000000     0.35349910    -0.19053324 &W:Wv,3
 
Change in Focus                :       0.000000                            0.000000 V@&zn8?  
Tilt Y tolerance on surface (degrees) 2 VO] Jvf  
TSTY   2            -0.20000000     0.35349910    -0.19053324     0.20000000     0.35349910    -0.19053324 TviC1 {2  
Change in Focus                :       0.000000                            0.000000 QU|{(
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Decenter X tolerance on surface 3 c[}h( jkP  
TSDX   3            -0.20000000     0.53419039    -0.00984195     0.20000000     0.53419039    -0.00984195 =24)`Lyb  
Change in Focus                :       0.000000                            0.000000 .;ml[DXH  
Decenter Y tolerance on surface 3 XAR~d6iZ  
TSDY   3            -0.20000000     0.53419039    -0.00984195     0.20000000     0.53419039    -0.00984195 y8HLrBTza  
Change in Focus                :       0.000000                            0.000000 \[Op:^S  
Tilt X tolerance on surface (degrees) 3 mf=,6fx28  
TSTX   3            -0.20000000     0.42861670    -0.11541563     0.20000000     0.42861670    -0.11541563 8W)3rD>  
Change in Focus                :       0.000000                            0.000000 .'mmn5E  
Tilt Y tolerance on surface (degrees) 3 <?kr"[cQeP  
TSTY   3            -0.20000000     0.42861670    -0.11541563     0.20000000     0.42861670    -0.11541563 HK)$ls  
Change in Focus                :       0.000000                            0.000000 I~\j%zD  
Irregularity of surface 1 in fringes .\= GfF'  
TIRR   1            -0.20000000     0.50973587    -0.03429647     0.20000000     0.57333868     0.02930634 gRIRc4p  
Change in Focus                :       0.000000                            0.000000 IzF7W?k  
Irregularity of surface 2 in fringes ;X<#y2`  
TIRR   2            -0.20000000     0.53400904    -0.01002330     0.20000000     0.55360281     0.00957047 2hdi)C,7Y  
Change in Focus                :       0.000000                            0.000000 h@=H7oV7k  
Irregularity of surface 3 in fringes zDeh#  
TIRR   3            -0.20000000     0.58078982     0.03675748     0.20000000     0.49904394    -0.04498840 EKZ40z`  
Change in Focus                :       0.000000                            0.000000 dRTtDH"%  
Index tolerance on surface 1 !SEHDRp  
TIND   1            -0.00100000     0.52606778    -0.01796456     0.00100000     0.56121811     0.01718578 .%_scNP  
Change in Focus                :       0.000000                            0.000000 U~-Z`_@^-  
Index tolerance on surface 2 4SCb9|/Q  
TIND   2            -0.00100000     0.55639086     0.01235852     0.00100000     0.53126361    -0.01276872 S!A)kK+  
Change in Focus                :       0.000000                           -0.000000 {\[u2{  
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Worst offenders: +6@".<  
Type                      Value      Criterion        Change 8fFURk  
TSTY   2            -0.20000000     0.35349910    -0.19053324 Ay;=1g)8+f  
TSTY   2             0.20000000     0.35349910    -0.19053324 u6IEBYG ((  
TSTX   2            -0.20000000     0.35349910    -0.19053324 y;<^[  
TSTX   2             0.20000000     0.35349910    -0.19053324 ]^$&Ejpe#  
TSTY   1            -0.20000000     0.42678383    -0.11724851 A1e|Y  
TSTY   1             0.20000000     0.42678383    -0.11724851 H>AQlO+J  
TSTX   1            -0.20000000     0.42678383    -0.11724851 >e :&kp  
TSTX   1             0.20000000     0.42678383    -0.11724851 c) Zid1  
TSTY   3            -0.20000000     0.42861670    -0.11541563 jG)fM?  
TSTY   3             0.20000000     0.42861670    -0.11541563 u:&gp  
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Estimated Performance Changes based upon Root-Sum-Square method: XFeHkU`C  
Nominal MTF                 :     0.54403234 s
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Estimated change            :    -0.36299231 Sq8`)$\  
Estimated MTF               :     0.18104003 .>DqdtP[  
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Compensator Statistics: mG@xehH  
Change in back focus: vS%o>"P  
Minimum            :        -0.000000 jjL(=n<J<"  
Maximum            :         0.000000 W4Rs9NA}  
Mean               :        -0.000000 ' Z:FGSwT  
Standard Deviation :         0.000000 9iGUE  
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Monte Carlo Analysis: Q!(16  
Number of trials: 20 ))V)]+  
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Initial Statistics: Normal Distribution sYM3&ikyHI  
"f/lm 2<  
  Trial       Criterion        Change [}q6bXM*  
      1     0.42804416    -0.11598818 4CVtXi_Y  
Change in Focus                :      -0.400171 5xX*68]%  
      2     0.54384387    -0.00018847 U">w3o|  
Change in Focus                :       1.018470 Cp=DdmR  
      3     0.44510003    -0.09893230 vggyQf%  
Change in Focus                :      -0.601922 zY_BnJ^  
      4     0.18154684    -0.36248550 S]mXfB(mh  
Change in Focus                :       0.920681 +#7e?B  
      5     0.28665820    -0.25737414 ukb2[mb*u  
Change in Focus                :       1.253875 'AU(WHf  
      6     0.21263372    -0.33139862 8sjAr.iT.  
Change in Focus                :      -0.903878 PB00\&6H  
      7     0.40051424    -0.14351809 'MH WNPG0  
Change in Focus                :      -1.354815 4^\5]d!  
      8     0.48754161    -0.05649072 !4TMgM  
Change in Focus                :       0.215922 Lb;:<  
      9     0.40357468    -0.14045766 m
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Change in Focus                :       0.281783 H!mNHY_fA  
     10     0.26315315    -0.28087919 {^zieP!  
Change in Focus                :      -1.048393 _]:wltPv  
     11     0.26120585    -0.28282649 Z~)Bh~^A  
Change in Focus                :       1.017611 k"X<gA  
     12     0.24033815    -0.30369419 gBb+Q,  
Change in Focus                :      -0.109292 :@#'&(#~  
     13     0.37164046    -0.17239188 8$9<z  
Change in Focus                :      -0.692430 !j[Oyr|  
     14     0.48597489    -0.05805744 Hh`x>{,|S  
Change in Focus                :      -0.662040 de{@u<YZb  
     15     0.21462327    -0.32940907 5/4N
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Change in Focus                :       1.611296 0.C[/u[  
     16     0.43378226    -0.11025008 @)=\q`vV  
Change in Focus                :      -0.640081 cnJ(Fv_F$  
     17     0.39321881    -0.15081353 `%_yRJd|;  
Change in Focus                :       0.914906 kSj,Pl\NC  
     18     0.20692530    -0.33710703 [)UL}vAO\q  
Change in Focus                :       0.801607 A3D"b9<D  
     19     0.51374068    -0.03029165 X:Z4
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Change in Focus                :       0.947293 %_Gc9SI  
     20     0.38013374    -0.16389860
7`-fN|  
Change in Focus                :       0.667010 Q${0(#Nu  
1}nrVn[B9  
Number of traceable Monte Carlo files generated: 20 -DD2
   
46`(u"RP  
Nominal     0.54403234 9>,$q"M}?  
Best        0.54384387    Trial     2 ?/"Fwjau  
Worst       0.18154684    Trial     4 C3 >X1nU  
Mean        0.35770970 T=Q"|S]V  
Std Dev     0.11156454 &L6xagR7M  
%%`Q5I  
p2T<nP<Pt  
Compensator Statistics: ('k;Ikut  
Change in back focus: n<RvL^T=  
Minimum            :        -1.354815 a&oz<4oT  
Maximum            :         1.611296 }i,LP1R  
Mean               :         0.161872  <sdC#j  
Standard Deviation :         0.869664 d +0(H   
2P)*Y5`KBH  
90% >       0.20977951               z+IHt(  
80% >       0.22748071               Si=zxy
T  
50% >       0.38667627               0'&N?rS  
20% >       0.46553746               n:QFwwQ`Q;  
10% >       0.50064115                ]6JI((  
'u"r^o?  
End of Run. cTlitf9  
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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 7nr+X Os  

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 *\W *,D.I  
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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                 {~cG'S Y%  
80% >       0.22748071                 3RYg-$NK[  
50% >       0.38667627                 <|qh5Scp  
20% >       0.46553746                 'ju  
10% >       0.50064115 ykq9]Xqhv  
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最后这个数值是MTF值呢，还是MTF的公差？ q ERdQ~M,  
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也就是说，这到底是有90%的产品MTF大于0.20977951还是90%的产品的MTF变化量大于0.20977951？？？   .Ioj]r  
*^h$%<QI  
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  : Sk'S`vH  
90% >       0.20977951                 gEejLyOag  
80% >       0.22748071                 Z$8X1(o  
50% >       0.38667627                 8SG*7[T7  
20% >       0.46553746                 Z(' iZ'55F  
10% >       0.50064115 ?<Tt1fpG  
....... RsY7F;  

|'C{nTX  
Pf?*bI  
这些数值都是MTF值

Criterion           : Geometric MTF average S&T at 30.0000 cycles per mm   %:^|Q;xe  
Mode                : Sensitivities >&1
MD}  
Sampling            : 2 hXvg<Rf  
Nominal Criterion   : 0.54403234 $@[`/Uh   
Test Wavelength     : 0.6328 Anpx%NVo  
^>g7Kg"0  
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？ ur'a{BI2R  
1>JUI5 {  
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