[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 hY*ylzr83  

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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 -4 *94<  
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图片:2.jpg

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然后运行分析的结果如下： u92);1R  
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Analysis of Tolerances J#1-Le8@  
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File : E:\光学设计资料\zemax练习\f500.ZMX Np2I*l6W  
Title: a:q>7V|%$  
Date : TUE JUN 21 2011 cj[a^ ZH  
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Units are Millimeters. S['rfD>9  
All changes are computed using linear differences. kjj4%0"  
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Paraxial Focus compensation only. mB\)Q J.%  
Gt4/ax:A@  
WARNING: Solves should be removed prior to tolerancing. x]6-r`O7r  
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Mnemonics: j ."L=  
TFRN: Tolerance on curvature in fringes. `7D]J*?`  
TTHI: Tolerance on thickness. cVV@MC  
TSDX: Tolerance on surface decentering in x. @p$Nw.{'  
TSDY: Tolerance on surface decentering in y. o[ Je  
TSTX: Tolerance on surface tilt in x (degrees). m{v*\e7
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TSTY: Tolerance on surface tilt in y (degrees). g)3HVAT  
TIRR: Tolerance on irregularity (fringes). 9V'ok.B.x  
TIND: Tolerance on Nd index of refraction. mRurGa

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TEDX: Tolerance on element decentering in x. |>Ld'\i8  
TEDY: Tolerance on element decentering in y.
_ww>u""B~  
TETX: Tolerance on element tilt in x (degrees). ~vbyX  
TETY: Tolerance on element tilt in y (degrees). qsT@aSIo9  
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WARNING: RAY AIMING IS OFF. Very loose tolerances may not be computed accurately. u# TNW.  
AT:L&~O.  
WARNING: Boundary constraints on compensators will be ignored. gR\z#Sg  
[ pe{,lp  
Criterion           : Geometric MTF average S&T at 30.0000 cycles per mm 2iWSk6%R  
Mode                : Sensitivities h&|S*  
Sampling            : 2 Yy 8?X9r.  
Nominal Criterion   : 0.54403234 i-jrF6&  
Test Wavelength     : 0.6328 f,}(=
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{`ghX%M(l  
4\_~B{kzZ  
Fields: XY Symmetric Angle in degrees {}n]\zO %  
#      X-Field      Y-Field       Weight    VDX    VDY    VCX    VCY f0|wN\  
1   0.000E+000   0.000E+000   1.000E+000  0.000  0.000  0.000  0.000 b)[2t^zG  
/g]NC?  
Sensitivity Analysis: gX%"Ki7.  
c98^~vR]]  
                 |----------------- Minimum ----------------| |----------------- Maximum ----------------| c%+_~iBUN  
Type                      Value      Criterion        Change          Value      Criterion        Change ymW? <\AD,  
Fringe tolerance on surface 1 \[J\I  
TFRN   1            -1.00000000     0.54257256    -0.00145977     1.00000000     0.54548607     0.00145374 5Ic'6AIz  
Change in Focus                :      -0.000000                            0.000000 yg^ 4<A  
Fringe tolerance on surface 2 W]W[oTJ5  
TFRN   2            -1.00000000     0.54177471    -0.00225762     1.00000000     0.54627463     0.00224230 +:_;K_h  
Change in Focus                :       0.000000                            0.000000 FKH_o  
Fringe tolerance on surface 3 RxYC]R^78  
TFRN   3            -1.00000000     0.54779866     0.00376632     1.00000000     0.54022572    -0.00380662 2CF5qn}T  
Change in Focus                :      -0.000000                            0.000000 Wt M1nnJp  
Thickness tolerance on surface 1 KaIkO8Dq0  
TTHI   1   3        -0.20000000     0.54321462    -0.00081772     0.20000000     0.54484759     0.00081525 dFl8'D  
Change in Focus                :       0.000000                            0.000000 . #FJM2Xk  
Thickness tolerance on surface 2 W]oILL"d  
TTHI   2   3        -0.20000000     0.54478712     0.00075478     0.20000000     0.54327558    -0.00075675 Yh["IhjR  
Change in Focus                :       0.000000                           -0.000000 LTTMxiq[*  
Decenter X tolerance on surfaces 1 through 3 S8,e`F  
TEDX   1   3        -0.20000000     0.54401464   -1.7700E-005     0.20000000     0.54401464   -1.7700E-005 ;)ku SH  
Change in Focus                :       0.000000                            0.000000 RxA:>yOPn  
Decenter Y tolerance on surfaces 1 through 3 }rQ0*h  
TEDY   1   3        -0.20000000     0.54401464   -1.7700E-005     0.20000000     0.54401464   -1.7700E-005 <'N~|B/yZ  
Change in Focus                :       0.000000                            0.000000 A7I{Le  
Tilt X tolerance on surfaces 1 through 3 (degrees) 0O!A8FA0  
TETX   1   3        -0.20000000     0.54897548     0.00494314     0.20000000     0.54897548     0.00494314 E*vh<C  
Change in Focus                :       0.000000                            0.000000 ]^0mh["  
Tilt Y tolerance on surfaces 1 through 3 (degrees) w+Y_TJ%  
TETY   1   3        -0.20000000     0.54897548     0.00494314     0.20000000     0.54897548     0.00494314 ^ AJ_  
Change in Focus                :       0.000000                            0.000000  WjsmLb:5  
Decenter X tolerance on surface 1 *AG01# ZF  
TSDX   1            -0.20000000     0.53999563    -0.00403671     0.20000000     0.53999563    -0.00403671 x
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Change in Focus                :       0.000000                            0.000000 %%T?LRv  
Decenter Y tolerance on surface 1 .3CQFbHF  
TSDY   1            -0.20000000     0.53999563    -0.00403671     0.20000000     0.53999563    -0.00403671 (-Qr.t_B`  
Change in Focus                :       0.000000                            0.000000 FM
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Tilt X tolerance on surface (degrees) 1 717OzrF}A?  
TSTX   1            -0.20000000     0.42678383    -0.11724851     0.20000000     0.42678383    -0.11724851 j6dlAe  
Change in Focus                :       0.000000                            0.000000 +62}//_?  
Tilt Y tolerance on surface (degrees) 1 lxfv'A  
TSTY   1            -0.20000000     0.42678383    -0.11724851     0.20000000     0.42678383    -0.11724851 Hbl&)!I  
Change in Focus                :       0.000000                            0.000000 Ov;q]Vn>  
Decenter X tolerance on surface 2 =>-W!Of  
TSDX   2            -0.20000000     0.51705427    -0.02697807     0.20000000     0.51705427    -0.02697807 e
8 c.&j3m  
Change in Focus                :       0.000000                            0.000000 2Mu3]2>  
Decenter Y tolerance on surface 2 Rxq4Diq5k  
TSDY   2            -0.20000000     0.51705427    -0.02697807     0.20000000     0.51705427    -0.02697807 re fAgS!=q  
Change in Focus                :       0.000000                            0.000000 @GWlo\rM6^  
Tilt X tolerance on surface (degrees) 2 #!C|~=  
TSTX   2            -0.20000000     0.35349910    -0.19053324     0.20000000     0.35349910    -0.19053324 ge]Z5E(1  
Change in Focus                :       0.000000                            0.000000 -HvJ&O.V$  
Tilt Y tolerance on surface (degrees) 2 K?u:-
QX^  
TSTY   2            -0.20000000     0.35349910    -0.19053324     0.20000000     0.35349910    -0.19053324 wAo6:)  
Change in Focus                :       0.000000                            0.000000 }vd72PB  
Decenter X tolerance on surface 3 (@NW
2  
TSDX   3            -0.20000000     0.53419039    -0.00984195     0.20000000     0.53419039    -0.00984195 a5/r|BiBK  
Change in Focus                :       0.000000                            0.000000 v.53fx  
Decenter Y tolerance on surface 3 ?L"x>$  
TSDY   3            -0.20000000     0.53419039    -0.00984195     0.20000000     0.53419039    -0.00984195 2S//5@~_m  
Change in Focus                :       0.000000                            0.000000 YbF}>1/"  
Tilt X tolerance on surface (degrees) 3  ;!j/t3#a  
TSTX   3            -0.20000000     0.42861670    -0.11541563     0.20000000     0.42861670    -0.11541563 jfYM*%  
Change in Focus                :       0.000000                            0.000000 qOAhBZ~  
Tilt Y tolerance on surface (degrees) 3 5&_R+g  
TSTY   3            -0.20000000     0.42861670    -0.11541563     0.20000000     0.42861670    -0.11541563 `('NH]^  
Change in Focus                :       0.000000                            0.000000 P! P` MX  
Irregularity of surface 1 in fringes R@KWiV  
TIRR   1            -0.20000000     0.50973587    -0.03429647     0.20000000     0.57333868     0.02930634 SC--jhDZ  
Change in Focus                :       0.000000                            0.000000 +hcJ!$J7  
Irregularity of surface 2 in fringes Of#"nu  
TIRR   2            -0.20000000     0.53400904    -0.01002330     0.20000000     0.55360281     0.00957047 v8TNBsEL  
Change in Focus                :       0.000000                            0.000000 tILnD1q  
Irregularity of surface 3 in fringes %reW/;)l{  
TIRR   3            -0.20000000     0.58078982     0.03675748     0.20000000     0.49904394    -0.04498840
AMN`bgxW  
Change in Focus                :       0.000000                            0.000000 3}B-n!|*  
Index tolerance on surface 1 p2gu@!  
TIND   1            -0.00100000     0.52606778    -0.01796456     0.00100000     0.56121811     0.01718578 9hgIQl  
Change in Focus                :       0.000000                            0.000000 Jw^h<z/Ux  
Index tolerance on surface 2 6n/KL  
TIND   2            -0.00100000     0.55639086     0.01235852     0.00100000     0.53126361    -0.01276872 nv3TxG  
Change in Focus                :       0.000000                           -0.000000 E O"  
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Worst offenders:
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Type                      Value      Criterion        Change q)PSHr=Z  
TSTY   2            -0.20000000     0.35349910    -0.19053324 iZ0.rcQj'o  
TSTY   2             0.20000000     0.35349910    -0.19053324 OqX+R4S  
TSTX   2            -0.20000000     0.35349910    -0.19053324 &zPM#Q  
TSTX   2             0.20000000     0.35349910    -0.19053324 @h5Q?I  
TSTY   1            -0.20000000     0.42678383    -0.11724851 _I%mY!x\`  
TSTY   1             0.20000000     0.42678383    -0.11724851 F#o{/u?T  
TSTX   1            -0.20000000     0.42678383    -0.11724851 0Qg%48u
 
TSTX   1             0.20000000     0.42678383    -0.11724851 U+uIuhz  
TSTY   3            -0.20000000     0.42861670    -0.11541563 &VxK AQMxN  
TSTY   3             0.20000000     0.42861670    -0.11541563 UJ`%uLR~  
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Estimated Performance Changes based upon Root-Sum-Square method: iHWt;]  
Nominal MTF                 :     0.54403234 :~p_(rE  
Estimated change            :    -0.36299231 BbI),iP  
Estimated MTF               :     0.18104003 cGWL'r)P  
17VNw/Y  
Compensator Statistics: &#@"^(} 6  
Change in back focus: `KE(R8y  
Minimum            :        -0.000000 &WdP=E"  
Maximum            :         0.000000 cSj(u%9}  
Mean               :        -0.000000 ">s0B5F7  
Standard Deviation :         0.000000 %Ip=3($Ku[  
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Monte Carlo Analysis: tOPkx(  
Number of trials: 20 B,Jn.YX  
d_98%U+u  
Initial Statistics: Normal Distribution wDs#1`uTq  
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  Trial       Criterion        Change 7.C]ZcU  
      1     0.42804416    -0.11598818 K$M,d- `b  
Change in Focus                :      -0.400171 T{T> S%17~  
      2     0.54384387    -0.00018847 7wqD_Xr  
Change in Focus                :       1.018470 =IIE]<z  
      3     0.44510003    -0.09893230 l_x>.'a  
Change in Focus                :      -0.601922 qche7kg!a  
      4     0.18154684    -0.36248550 E eCgV{9B  
Change in Focus                :       0.920681 U7G|4(  
      5     0.28665820    -0.25737414 Q1 vse  
Change in Focus                :       1.253875 m>b i$Y  
      6     0.21263372    -0.33139862  ^9kdd[  
Change in Focus                :      -0.903878 <zu)=W'R]  
      7     0.40051424    -0.14351809 BimM)4g  
Change in Focus                :      -1.354815 ||?wRMV  
      8     0.48754161    -0.05649072 td+[Na0d  
Change in Focus                :       0.215922 hpticW|  
      9     0.40357468    -0.14045766 fVBRP[,  
Change in Focus                :       0.281783 P+3)YO1C  
     10     0.26315315    -0.28087919 7M9s}b%?  
Change in Focus                :      -1.048393 Xg97[I8/  
     11     0.26120585    -0.28282649 ix}*whW=U  
Change in Focus                :       1.017611 FD}>}fLv  
     12     0.24033815    -0.30369419 +z\O"zlj  
Change in Focus                :      -0.109292 c>Ljv('bj  
     13     0.37164046    -0.17239188 O11.wLNH  
Change in Focus                :      -0.692430 .{]=v
 
     14     0.48597489    -0.05805744 t,;b*ZR  
Change in Focus                :      -0.662040 H %PIE1_  
     15     0.21462327    -0.32940907 dnTXx*I:  
Change in Focus                :       1.611296 Iyvl6  
     16     0.43378226    -0.11025008  ,#
-^  
Change in Focus                :      -0.640081 z9KsSlS ^  
     17     0.39321881    -0.15081353 0 .p $q  
Change in Focus                :       0.914906 iAWoKW  
     18     0.20692530    -0.33710703 FkT% -I  
Change in Focus                :       0.801607 -OP5v8c f  
     19     0.51374068    -0.03029165 +<I1@C  
Change in Focus                :       0.947293 B6vmBmN  
     20     0.38013374    -0.16389860 d_Vwjv&@/"  
Change in Focus                :       0.667010 8%#uZG\}  
UJF }Ye  
Number of traceable Monte Carlo files generated: 20 ; bDFrG  
1')/BM2  
Nominal     0.54403234 XC{(O:EG  
Best        0.54384387    Trial     2 AuYi$?8|5  
Worst       0.18154684    Trial     4 HM1y$ej  
Mean        0.35770970 O^gq\X4}  
Std Dev     0.11156454 }fs;yPl,  
$RSVN?  
UoxF00H@!  
Compensator Statistics: W.,J'  
Change in back focus: M>k7 '@G  
Minimum            :        -1.354815 aa1XY&G"!  
Maximum            :         1.611296 wGQ{  
Mean               :         0.161872 +=@Z5eu  
Standard Deviation :         0.869664 \9k{"4jX\  
et]*5Y6  
90% >       0.20977951               YKvFZH)  
80% >       0.22748071               _?_Svx2  
50% >       0.38667627               7\U1K
^q  
20% >       0.46553746               (A&@ <  
10% >       0.50064115                hOMFDfhU  
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End of Run. y$V{yh[:  
^! ZjK-$A<  
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 I}v'n{5(  

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 Da-(D<[0  
5\Y/so=  
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                 #EM'=Q%TO  
80% >       0.22748071                 anwn!Eqk"  
50% >       0.38667627                 GQZUC\cB  
20% >       0.46553746                 u ?Xku8 1l  
10% >       0.50064115 x/S%NySG  
5#F+-9r  
最后这个数值是MTF值呢，还是MTF的公差？ Q8~
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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？？？   LGMFv  
mDmWTq\  
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  : (O2HB-<rY  
90% >       0.20977951                 V2,WP  
80% >       0.22748071                 ^BX@0"&-  
50% >       0.38667627                 0AKwZ' &H  
20% >       0.46553746                 o z{j2%  
10% >       0.50064115 m[j3s=Gr  
....... v`BG1&/|  

H|U/t
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这些数值都是MTF值

Criterion           : Geometric MTF average S&T at 30.0000 cycles per mm   -0da"AB  
Mode                : Sensitivities oQnk+>}%  
Sampling            : 2 Q
'%o;z*  
Nominal Criterion   : 0.54403234 ('q vYQ  
Test Wavelength     : 0.6328 uO(guA,C  
&vX!7Y  
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？ 7E3SvC|M  
}FiN 7#  
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