[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 x6=tS  
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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 wp-3U}P2(  
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图片:2.jpg

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然后运行分析的结果如下： <5sfII  
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Analysis of Tolerances
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File : E:\光学设计资料\zemax练习\f500.ZMX q?&JS  
Title:  q0\$wI  
Date : TUE JUN 21 2011 Gv\fF;,R  
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Units are Millimeters.
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All changes are computed using linear differences. aII:Pzh]B  
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Paraxial Focus compensation only. @{8805Dp  
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WARNING: Solves should be removed prior to tolerancing. V0:db  
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Mnemonics: c-
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TFRN: Tolerance on curvature in fringes. G@S'_  
TTHI: Tolerance on thickness. w;^7FuBaC  
TSDX: Tolerance on surface decentering in x. niM(0p  
TSDY: Tolerance on surface decentering in y. HSk}09GV  
TSTX: Tolerance on surface tilt in x (degrees). C6b(\#g(  
TSTY: Tolerance on surface tilt in y (degrees). fP1fm  
TIRR: Tolerance on irregularity (fringes). 9M-/{D^+<  
TIND: Tolerance on Nd index of refraction. _n< @Jk~  
TEDX: Tolerance on element decentering in x. rHgrCMW  
TEDY: Tolerance on element decentering in y. gH/k}M7tA#  
TETX: Tolerance on element tilt in x (degrees). UIw6~a3E  
TETY: Tolerance on element tilt in y (degrees). ,Onu%  
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WARNING: RAY AIMING IS OFF. Very loose tolerances may not be computed accurately. rYr.mX  
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WARNING: Boundary constraints on compensators will be ignored. = G3A}  
p&;,$KDA  
Criterion           : Geometric MTF average S&T at 30.0000 cycles per mm ' 9  
Mode                : Sensitivities 90)rOD1B  
Sampling            : 2 &]/.=J  
Nominal Criterion   : 0.54403234 H=9\B}  
Test Wavelength     : 0.6328 aw/5#(1R  
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V?cUQghHg  
Fields: XY Symmetric Angle in degrees jl4rEzVu  
#      X-Field      Y-Field       Weight    VDX    VDY    VCX    VCY R0mWVgoz  
1   0.000E+000   0.000E+000   1.000E+000  0.000  0.000  0.000  0.000 u@zBE? g  
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9'KWs]  
Sensitivity Analysis: sQe>LNp,G  
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                 |----------------- Minimum ----------------| |----------------- Maximum ----------------| cb~m==G  
Type                      Value      Criterion        Change          Value      Criterion        Change ;rH@>VrR  
Fringe tolerance on surface 1 Ss7XjWP.}  
TFRN   1            -1.00000000     0.54257256    -0.00145977     1.00000000     0.54548607     0.00145374 wD&b[i  
Change in Focus                :      -0.000000                            0.000000 .{W)E  
Fringe tolerance on surface 2 -vC?bumR%  
TFRN   2            -1.00000000     0.54177471    -0.00225762     1.00000000     0.54627463     0.00224230 W1J7$  
Change in Focus                :       0.000000                            0.000000 [t`QV2um  
Fringe tolerance on surface 3 2]*2b{gF,  
TFRN   3            -1.00000000     0.54779866     0.00376632     1.00000000     0.54022572    -0.00380662 {%b-~& F9  
Change in Focus                :      -0.000000                            0.000000 hYNb9^  
Thickness tolerance on surface 1 g@lAk%V4  
TTHI   1   3        -0.20000000     0.54321462    -0.00081772     0.20000000     0.54484759     0.00081525 ];go?.*C  
Change in Focus                :       0.000000                            0.000000 Ws`P(WHm  
Thickness tolerance on surface 2 z<mU$<  
TTHI   2   3        -0.20000000     0.54478712     0.00075478     0.20000000     0.54327558    -0.00075675 C,D~2G  
Change in Focus                :       0.000000                           -0.000000 w~g)Dz2G  
Decenter X tolerance on surfaces 1 through 3  `#lNur\x  
TEDX   1   3        -0.20000000     0.54401464   -1.7700E-005     0.20000000     0.54401464   -1.7700E-005 4<&`\<jZ  
Change in Focus                :       0.000000                            0.000000 : LI*#~'Ka  
Decenter Y tolerance on surfaces 1 through 3 vH#^|u  
TEDY   1   3        -0.20000000     0.54401464   -1.7700E-005     0.20000000     0.54401464   -1.7700E-005 L1k_AC1.M
 
Change in Focus                :       0.000000                            0.000000 NUH#  
Tilt X tolerance on surfaces 1 through 3 (degrees) p`JD8c  
TETX   1   3        -0.20000000     0.54897548     0.00494314     0.20000000     0.54897548     0.00494314 OsR4oT  
Change in Focus                :       0.000000                            0.000000 lH^[b[  
Tilt Y tolerance on surfaces 1 through 3 (degrees) gI^*O@Q4{b  
TETY   1   3        -0.20000000     0.54897548     0.00494314     0.20000000     0.54897548     0.00494314 o3l_&?^  
Change in Focus                :       0.000000                            0.000000 U.G**v  
Decenter X tolerance on surface 1 !}^{W)h[  
TSDX   1            -0.20000000     0.53999563    -0.00403671     0.20000000     0.53999563    -0.00403671 ]f q.r  
Change in Focus                :       0.000000                            0.000000 .Eg>)  
Decenter Y tolerance on surface 1 LdA
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TSDY   1            -0.20000000     0.53999563    -0.00403671     0.20000000     0.53999563    -0.00403671 v7/qJ9l  
Change in Focus                :       0.000000                            0.000000 `:A`%Fg8<  
Tilt X tolerance on surface (degrees) 1 !285=cxz  
TSTX   1            -0.20000000     0.42678383    -0.11724851     0.20000000     0.42678383    -0.11724851 yggQ4y6  
Change in Focus                :       0.000000                            0.000000 X] &Q^  
Tilt Y tolerance on surface (degrees) 1 i9oi}$;J  
TSTY   1            -0.20000000     0.42678383    -0.11724851     0.20000000     0.42678383    -0.11724851 [x5T7=  
Change in Focus                :       0.000000                            0.000000 1G+42>?<1  
Decenter X tolerance on surface 2 ,m:YZ;J(Xd  
TSDX   2            -0.20000000     0.51705427    -0.02697807     0.20000000     0.51705427    -0.02697807 DEL#MD!  
Change in Focus                :       0.000000                            0.000000 xS`>[8?3<T  
Decenter Y tolerance on surface 2 ]`&ws
  
TSDY   2            -0.20000000     0.51705427    -0.02697807     0.20000000     0.51705427    -0.02697807 TCFx+*fBd  
Change in Focus                :       0.000000                            0.000000 =x~HcsJ8!R  
Tilt X tolerance on surface (degrees) 2  `'5(4j  
TSTX   2            -0.20000000     0.35349910    -0.19053324     0.20000000     0.35349910    -0.19053324 y!Q&;xO+!  
Change in Focus                :       0.000000                            0.000000 ,\f!e#d  
Tilt Y tolerance on surface (degrees) 2 n8[ sl]L  
TSTY   2            -0.20000000     0.35349910    -0.19053324     0.20000000     0.35349910    -0.19053324 #|34(ML  
Change in Focus                :       0.000000                            0.000000 ~fE@]~f>  
Decenter X tolerance on surface 3 <ok/2v
 
TSDX   3            -0.20000000     0.53419039    -0.00984195     0.20000000     0.53419039    -0.00984195 =$IjN v(?  
Change in Focus                :       0.000000                            0.000000 hof:+aW  
Decenter Y tolerance on surface 3 'tp1|n/1  
TSDY   3            -0.20000000     0.53419039    -0.00984195     0.20000000     0.53419039    -0.00984195 ]w(i,iJ  
Change in Focus                :       0.000000                            0.000000 
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Tilt X tolerance on surface (degrees) 3 Uax- z  
TSTX   3            -0.20000000     0.42861670    -0.11541563     0.20000000     0.42861670    -0.11541563 41WnKz9c  
Change in Focus                :       0.000000                            0.000000 -1~bWRYq  
Tilt Y tolerance on surface (degrees) 3 iU\WV  
TSTY   3            -0.20000000     0.42861670    -0.11541563     0.20000000     0.42861670    -0.11541563 9Bl_t}0  
Change in Focus                :       0.000000                            0.000000 l-"$
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Irregularity of surface 1 in fringes pUWj,&t  
TIRR   1            -0.20000000     0.50973587    -0.03429647     0.20000000     0.57333868     0.02930634 7%9Sz5z  
Change in Focus                :       0.000000                            0.000000 w9h\J#f  
Irregularity of surface 2 in fringes w3c[t~R8  
TIRR   2            -0.20000000     0.53400904    -0.01002330     0.20000000     0.55360281     0.00957047 /z*?:*  
Change in Focus                :       0.000000                            0.000000 #z)@T  
Irregularity of surface 3 in fringes E/9 U
0  
TIRR   3            -0.20000000     0.58078982     0.03675748     0.20000000     0.49904394    -0.04498840 hV/$6 8A_  
Change in Focus                :       0.000000                            0.000000 2;NIUMAMM  
Index tolerance on surface 1 =usx' #rb  
TIND   1            -0.00100000     0.52606778    -0.01796456     0.00100000     0.56121811     0.01718578 6';'pHqe  
Change in Focus                :       0.000000                            0.000000 qIa|sV\w0  
Index tolerance on surface 2 wGE:U`
 
TIND   2            -0.00100000     0.55639086     0.01235852     0.00100000     0.53126361    -0.01276872 b/
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Change in Focus                :       0.000000                           -0.000000 ;GO>#yg4Eh  
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Worst offenders: e;R
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Type                      Value      Criterion        Change yw2^kk93|  
TSTY   2            -0.20000000     0.35349910    -0.19053324 ._"U{ f2V  
TSTY   2             0.20000000     0.35349910    -0.19053324 TGGeTtk=  
TSTX   2            -0.20000000     0.35349910    -0.19053324 V4}9f5FR  
TSTX   2             0.20000000     0.35349910    -0.19053324 l njaHol0  
TSTY   1            -0.20000000     0.42678383    -0.11724851 b;O]@kBB
 
TSTY   1             0.20000000     0.42678383    -0.11724851 qCn(~:  
TSTX   1            -0.20000000     0.42678383    -0.11724851 Zg%U4m:  
TSTX   1             0.20000000     0.42678383    -0.11724851 Sve~-aG  
TSTY   3            -0.20000000     0.42861670    -0.11541563 PmO ut
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TSTY   3             0.20000000     0.42861670    -0.11541563 %p)6m2Sb  
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Estimated Performance Changes based upon Root-Sum-Square method: /pZLt)=P  
Nominal MTF                 :     0.54403234 g= k}6"F~  
Estimated change            :    -0.36299231 2c@R!*  
Estimated MTF               :     0.18104003 abU
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1 e1$x@\\  
Compensator Statistics: ={-\)j  
Change in back focus: z_~f/  
Minimum            :        -0.000000 8MGtJ'.  
Maximum            :         0.000000 ?N<* ATCL  
Mean               :        -0.000000 Ey=
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Standard Deviation :         0.000000 *<#jr  
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Monte Carlo Analysis: o-Pa3L=  
Number of trials: 20 hS}?"ST|  
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Initial Statistics: Normal Distribution sH(4.36+  
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  Trial       Criterion        Change A9ia[2[  
      1     0.42804416    -0.11598818 %*lOzC  
Change in Focus                :      -0.400171 ilEWxr;,  
      2     0.54384387    -0.00018847 =0TnH<`  
Change in Focus                :       1.018470 R:P'QM   
      3     0.44510003    -0.09893230 QpwOrxI}
 
Change in Focus                :      -0.601922 U0q{8 "Pl  
      4     0.18154684    -0.36248550 t6BggO"_u  
Change in Focus                :       0.920681 '{p/F $  
      5     0.28665820    -0.25737414 #ok1qT9_  
Change in Focus                :       1.253875 M5s>;q)  
      6     0.21263372    -0.33139862 Uc%(#I]Mi  
Change in Focus                :      -0.903878 > $DMVtE0  
      7     0.40051424    -0.14351809 'Ar+k\.J  
Change in Focus                :      -1.354815 (wU<Kpt?J  
      8     0.48754161    -0.05649072 n]?Yv E  
Change in Focus                :       0.215922 G < Z)y#  
      9     0.40357468    -0.14045766 y{+$B Y$_  
Change in Focus                :       0.281783 M?Tb9c?`  
     10     0.26315315    -0.28087919 W\:!v%C  
Change in Focus                :      -1.048393 MWl?pG!Y  
     11     0.26120585    -0.28282649 #'fh'$5"  
Change in Focus                :       1.017611 VliX'.-  
     12     0.24033815    -0.30369419 R7}=k)U?d@  
Change in Focus                :      -0.109292 Yb\t0:_  
     13     0.37164046    -0.17239188 oa$-o/DhB  
Change in Focus                :      -0.692430 5A oKlJrY  
     14     0.48597489    -0.05805744 O*xC}$OOn  
Change in Focus                :      -0.662040 B:#5U85m  
     15     0.21462327    -0.32940907 ~A2{$C  
Change in Focus                :       1.611296 !|;^  
     16     0.43378226    -0.11025008 VTQ V]>|  
Change in Focus                :      -0.640081 ~=91Kxf  
     17     0.39321881    -0.15081353 6&_"dg"  
Change in Focus                :       0.914906 v7&oHOk!  
     18     0.20692530    -0.33710703 ".A+'pJ
  
Change in Focus                :       0.801607 L)W1bW}  
     19     0.51374068    -0.03029165 'QW/TJ=7r  
Change in Focus                :       0.947293 k=1([x  
     20     0.38013374    -0.16389860 5S`_q&  
Change in Focus                :       0.667010 6t/nM  
~XGBE  
Number of traceable Monte Carlo files generated: 20 =lY6v-MBw  
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Nominal     0.54403234 V}gP'f07zy  
Best        0.54384387    Trial     2 n "?It  
Worst       0.18154684    Trial     4 )rcFBD{vM  
Mean        0.35770970 6/_] |4t  
Std Dev     0.11156454 ATx6YP@7~  
%;ZWYj`]n  
4g<F."  
Compensator Statistics: vU,AOK[l{  
Change in back focus: !wP|t#Sc9  
Minimum            :        -1.354815 &N4Jpa}w/%  
Maximum            :         1.611296 !l
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Mean               :         0.161872 ML@-@BaN  
Standard Deviation :         0.869664 ,{DZvif   
aDEz|>q  
90% >       0.20977951               z\64Qpfm  
80% >       0.22748071               -7jP'l=h  
50% >       0.38667627               Z3jh-{0  
20% >       0.46553746               /){F0Zjjt  
10% >       0.50064115                HQP
b  
4#hDt^N~  
End of Run. 4Uz1~AuNxb  
:lf;CT6$  
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 }#0MJ6L  

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 [4qCW{x._  
"
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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                 7lP3\7wD@9  
80% >       0.22748071                 NF?FEUoxz  
50% >       0.38667627                 }h+_kRQ  
20% >       0.46553746                 eFO+@  
10% >       0.50064115 qg7] YT&  

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最后这个数值是MTF值呢，还是MTF的公差？ {HgW9N(  
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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？？？   G5^gwG+  
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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  : <.3@-z>w2,  
90% >       0.20977951                 gB3&AQ  
80% >       0.22748071                 ?Di
,'  
50% >       0.38667627                 81a&99k#  
20% >       0.46553746                 Y=G *[
G#  
10% >       0.50064115 /2u;w!oi.  
....... m@JU).NKCS  

o*n""m  
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这些数值都是MTF值

Criterion           : Geometric MTF average S&T at 30.0000 cycles per mm   !W$3p'8Tu  
Mode                : Sensitivities 5d}PrYa  
Sampling            : 2 E08AZOY&g  
Nominal Criterion   : 0.54403234 dab>@z4  
Test Wavelength     : 0.6328 3:Co K#  
w]yLdfi!  
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？ f| N(~  
c<&+[{|  
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