[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 T"t.t%(8  
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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 TqSjL{l%  
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图片:2.jpg

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然后运行分析的结果如下： g6+5uvpd  
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Analysis of Tolerances 6J_
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File : E:\光学设计资料\zemax练习\f500.ZMX sgnc$x"  
Title: sy-#Eo#3  
Date : TUE JUN 21 2011 JNT|h zV  
Ms5R7<O.7  
Units are Millimeters. ^x$1N
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All changes are computed using linear differences. *K& $9fah  
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Paraxial Focus compensation only. =p7id5"  
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WARNING: Solves should be removed prior to tolerancing. d^v.tYM$N  
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Mnemonics: :6Tv4ZUvcG  
TFRN: Tolerance on curvature in fringes. |f\WVGH  
TTHI: Tolerance on thickness. $~j9{*
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TSDX: Tolerance on surface decentering in x. g3yZi7b5FU  
TSDY: Tolerance on surface decentering in y. 2aX{r/Lc  
TSTX: Tolerance on surface tilt in x (degrees). ic4hO>p&  
TSTY: Tolerance on surface tilt in y (degrees). =6f)sZpPh  
TIRR: Tolerance on irregularity (fringes). 1 .[OS  
TIND: Tolerance on Nd index of refraction. 5sj$XA?5  
TEDX: Tolerance on element decentering in x. f*IvaY  
TEDY: Tolerance on element decentering in y. +F%tBUY{<  
TETX: Tolerance on element tilt in x (degrees). (uy\~Zb  
TETY: Tolerance on element tilt in y (degrees). 'm"Ez'sS  
VR%*8=  
WARNING: RAY AIMING IS OFF. Very loose tolerances may not be computed accurately. hy@b/Y![M  
0%Y}CDn_  
WARNING: Boundary constraints on compensators will be ignored. Y*O Bky  
IS`ADDU[S  
Criterion           : Geometric MTF average S&T at 30.0000 cycles per mm ZG{#CC
=  
Mode                : Sensitivities U.b|3E/^  
Sampling            : 2 \PFjw9s  
Nominal Criterion   : 0.54403234 e**'[3Y  
Test Wavelength     : 0.6328 ;O5I
u  
*J >6i2M,u  
^#K^WV  
Fields: XY Symmetric Angle in degrees .2_
xTt  
#      X-Field      Y-Field       Weight    VDX    VDY    VCX    VCY A:(qF.Tm  
1   0.000E+000   0.000E+000   1.000E+000  0.000  0.000  0.000  0.000 ]2ycJ >w  
1CM8P3  
Sensitivity Analysis: + Okw+v  
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                 |----------------- Minimum ----------------| |----------------- Maximum ----------------| rY1jC\  
Type                      Value      Criterion        Change          Value      Criterion        Change so| U&`G  
Fringe tolerance on surface 1 86dz Jh  
TFRN   1            -1.00000000     0.54257256    -0.00145977     1.00000000     0.54548607     0.00145374 $2blF)uYE  
Change in Focus                :      -0.000000                            0.000000 IjXxH]2  
Fringe tolerance on surface 2 Ir*{IV
vej  
TFRN   2            -1.00000000     0.54177471    -0.00225762     1.00000000     0.54627463     0.00224230 Qw|y%Td8r  
Change in Focus                :       0.000000                            0.000000 ~ahu{A4Bw  
Fringe tolerance on surface 3 'aEN(Mdz1e  
TFRN   3            -1.00000000     0.54779866     0.00376632     1.00000000     0.54022572    -0.00380662 `Hv"^o  
Change in Focus                :      -0.000000                            0.000000 * kUb[  
Thickness tolerance on surface 1 ~x@V"rxGw  
TTHI   1   3        -0.20000000     0.54321462    -0.00081772     0.20000000     0.54484759     0.00081525 p6)6Gcx  
Change in Focus                :       0.000000                            0.000000 xon^=Wo;  
Thickness tolerance on surface 2
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TTHI   2   3        -0.20000000     0.54478712     0.00075478     0.20000000     0.54327558    -0.00075675 s$0dLEa9  
Change in Focus                :       0.000000                           -0.000000 ed3wj3@  
Decenter X tolerance on surfaces 1 through 3 }jFRuT;35  
TEDX   1   3        -0.20000000     0.54401464   -1.7700E-005     0.20000000     0.54401464   -1.7700E-005 9#~jlq(  
Change in Focus                :       0.000000                            0.000000 :Dtm+EQ  
Decenter Y tolerance on surfaces 1 through 3 V%C'@m(/SZ  
TEDY   1   3        -0.20000000     0.54401464   -1.7700E-005     0.20000000     0.54401464   -1.7700E-005 R?N+./{  
Change in Focus                :       0.000000                            0.000000 fZJM'+J@A  
Tilt X tolerance on surfaces 1 through 3 (degrees) >%n6n! "  
TETX   1   3        -0.20000000     0.54897548     0.00494314     0.20000000     0.54897548     0.00494314 Ys?0hd<cn  
Change in Focus                :       0.000000                            0.000000 K
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Tilt Y tolerance on surfaces 1 through 3 (degrees) beV+3HqB8  
TETY   1   3        -0.20000000     0.54897548     0.00494314     0.20000000     0.54897548     0.00494314 nvc(<Ovw  
Change in Focus                :       0.000000                            0.000000 8vfC  
Decenter X tolerance on surface 1 ) :Px`] 5  
TSDX   1            -0.20000000     0.53999563    -0.00403671     0.20000000     0.53999563    -0.00403671 C{G%"q  
Change in Focus                :       0.000000                            0.000000 X76rme  
Decenter Y tolerance on surface 1 {W%XSE  
TSDY   1            -0.20000000     0.53999563    -0.00403671     0.20000000     0.53999563    -0.00403671 ?[DVYP  
Change in Focus                :       0.000000                            0.000000 ltkA7dUbu  
Tilt X tolerance on surface (degrees) 1 3#\C!T0y  
TSTX   1            -0.20000000     0.42678383    -0.11724851     0.20000000     0.42678383    -0.11724851 u%OLXb  
Change in Focus                :       0.000000                            0.000000 E%Ko[G  
Tilt Y tolerance on surface (degrees) 1 d4A:XNKB  
TSTY   1            -0.20000000     0.42678383    -0.11724851     0.20000000     0.42678383    -0.11724851 w7\ \m9  
Change in Focus                :       0.000000                            0.000000 N&(MM.\`^  
Decenter X tolerance on surface 2 ]IDhE{  
TSDX   2            -0.20000000     0.51705427    -0.02697807     0.20000000     0.51705427    -0.02697807 Wi~?2-!   
Change in Focus                :       0.000000                            0.000000 V,?])=Ax  
Decenter Y tolerance on surface 2 J$`5KbT3  
TSDY   2            -0.20000000     0.51705427    -0.02697807     0.20000000     0.51705427    -0.02697807 |f$gQI!XW  
Change in Focus                :       0.000000                            0.000000 zW[HGI6w  
Tilt X tolerance on surface (degrees) 2 ndk~(ex|j  
TSTX   2            -0.20000000     0.35349910    -0.19053324     0.20000000     0.35349910    -0.19053324 rf!i?vAe  
Change in Focus                :       0.000000                            0.000000 s>{\^T7y  
Tilt Y tolerance on surface (degrees) 2 N~?(<DyZR  
TSTY   2            -0.20000000     0.35349910    -0.19053324     0.20000000     0.35349910    -0.19053324 PMQlJ&  
Change in Focus                :       0.000000                            0.000000 ~{{7y]3M-  
Decenter X tolerance on surface 3 xF 3Z>  
TSDX   3            -0.20000000     0.53419039    -0.00984195     0.20000000     0.53419039    -0.00984195 >3I|5kZ6  
Change in Focus                :       0.000000                            0.000000 3aJYl3:0B  
Decenter Y tolerance on surface 3 "DX2Mu=  
TSDY   3            -0.20000000     0.53419039    -0.00984195     0.20000000     0.53419039    -0.00984195 Qr-,
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Change in Focus                :       0.000000                            0.000000 3k/X;:,.  
Tilt X tolerance on surface (degrees) 3
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TSTX   3            -0.20000000     0.42861670    -0.11541563     0.20000000     0.42861670    -0.11541563 meGLT/   
Change in Focus                :       0.000000                            0.000000 KvO5-g  
Tilt Y tolerance on surface (degrees) 3 5d-rF:#  
TSTY   3            -0.20000000     0.42861670    -0.11541563     0.20000000     0.42861670    -0.11541563 YmHu8H_Q  
Change in Focus                :       0.000000                            0.000000 uu/2C \n}  
Irregularity of surface 1 in fringes ,=: -&~?  
TIRR   1            -0.20000000     0.50973587    -0.03429647     0.20000000     0.57333868     0.02930634 &QFc)QP
{  
Change in Focus                :       0.000000                            0.000000 f`[E^zj  
Irregularity of surface 2 in fringes `:O
je  
TIRR   2            -0.20000000     0.53400904    -0.01002330     0.20000000     0.55360281     0.00957047 h"f_T [  
Change in Focus                :       0.000000                            0.000000 u7},+E)+B  
Irregularity of surface 3 in fringes YU\k D
  
TIRR   3            -0.20000000     0.58078982     0.03675748     0.20000000     0.49904394    -0.04498840 %Y9CZRY9  
Change in Focus                :       0.000000                            0.000000 4v9d& m!<  
Index tolerance on surface 1 b&9~F6aM  
TIND   1            -0.00100000     0.52606778    -0.01796456     0.00100000     0.56121811     0.01718578 !&5*H06  
Change in Focus                :       0.000000                            0.000000 wVc^l  
Index tolerance on surface 2 Zb:Z,O(vn  
TIND   2            -0.00100000     0.55639086     0.01235852     0.00100000     0.53126361    -0.01276872 Ml'lZ)  
Change in Focus                :       0.000000                           -0.000000 I^[[*Bh*C  
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Worst offenders: dk0} q6~
 
Type                      Value      Criterion        Change vx}B
TH  
TSTY   2            -0.20000000     0.35349910    -0.19053324 `v)ZOw9&  
TSTY   2             0.20000000     0.35349910    -0.19053324 /<Z3x _c  
TSTX   2            -0.20000000     0.35349910    -0.19053324 ^z51f>C  
TSTX   2             0.20000000     0.35349910    -0.19053324 (k_9<Yb3  
TSTY   1            -0.20000000     0.42678383    -0.11724851 RYdI$&]  
TSTY   1             0.20000000     0.42678383    -0.11724851 yR"mRy1  
TSTX   1            -0.20000000     0.42678383    -0.11724851 yq[@Cw  
TSTX   1             0.20000000     0.42678383    -0.11724851 69`*u<{PC  
TSTY   3            -0.20000000     0.42861670    -0.11541563 X8wtdd]64  
TSTY   3             0.20000000     0.42861670    -0.11541563 g{f7} gTG  
T`9nY!  
Estimated Performance Changes based upon Root-Sum-Square method: -aV(6i*n  
Nominal MTF                 :     0.54403234 RE1M4UV.  
Estimated change            :    -0.36299231 nj1PR`AE  
Estimated MTF               :     0.18104003 k=&n>P  
u'T-}95 V  
Compensator Statistics: =ADOf_n}  
Change in back focus: |*Oi:)qt  
Minimum            :        -0.000000 e3?z^AUXm  
Maximum            :         0.000000 mu5r
4W47  
Mean               :        -0.000000 hDQk z
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Standard Deviation :         0.000000 ;lfv.-u:<  
H!>>|6OPF  
Monte Carlo Analysis: 4Z5;y[k(  
Number of trials: 20 h@o6=d=4  
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Initial Statistics: Normal Distribution s+z5"3'n  
A;dD'Kgl  
  Trial       Criterion        Change `5rfO6;  
      1     0.42804416    -0.11598818 b*/Mco 9O  
Change in Focus                :      -0.400171 z^s\&gix  
      2     0.54384387    -0.00018847 hljKBx~  
Change in Focus                :       1.018470 eTay/i<-  
      3     0.44510003    -0.09893230 *aFY+.;U`  
Change in Focus                :      -0.601922 67 ~pn  
      4     0.18154684    -0.36248550 %(W8WLz}  
Change in Focus                :       0.920681 0s\ -iub=d  
      5     0.28665820    -0.25737414 M{)&SNI*C  
Change in Focus                :       1.253875 YD0hDp  
      6     0.21263372    -0.33139862 pOh<I{r1  
Change in Focus                :      -0.903878 gNc;P[  
      7     0.40051424    -0.14351809 f=u
+G  
Change in Focus                :      -1.354815 !2^~ar{2  
      8     0.48754161    -0.05649072 `w`F-ke]I  
Change in Focus                :       0.215922 =N8_S$nx(  
      9     0.40357468    -0.14045766 1N:~5S}s>  
Change in Focus                :       0.281783 ^!0z+M:>^  
     10     0.26315315    -0.28087919 8FZC0j.^DH  
Change in Focus                :      -1.048393 %u_dxpx  
     11     0.26120585    -0.28282649 O&yAFiCd  
Change in Focus                :       1.017611 3D1y^I  
     12     0.24033815    -0.30369419 C&R U  
Change in Focus                :      -0.109292 8 H3u"  
     13     0.37164046    -0.17239188 g_N^Y  
Change in Focus                :      -0.692430 EWgJ"WTF  
     14     0.48597489    -0.05805744
,<)D3K<  
Change in Focus                :      -0.662040 T93st<F=R  
     15     0.21462327    -0.32940907 &/ED.K  
Change in Focus                :       1.611296 F&m9G >r  
     16     0.43378226    -0.11025008 /BD'{tZ]Sl  
Change in Focus                :      -0.640081 a]xGzv5  
     17     0.39321881    -0.15081353 X!mJUDzh]  
Change in Focus                :       0.914906 D~URY_[A  
     18     0.20692530    -0.33710703 Yf~Kzv1]*  
Change in Focus                :       0.801607 E2YVl%.
 
     19     0.51374068    -0.03029165 v9Sk\9}S  
Change in Focus                :       0.947293 / o I 4&W  
     20     0.38013374    -0.16389860 EhM=wfGKw  
Change in Focus                :       0.667010 D,[Nn_N  
80'@+AD  
Number of traceable Monte Carlo files generated: 20 1K<}  
_SOwiz  
Nominal     0.54403234 jC>#`gD  
Best        0.54384387    Trial     2 V,0$mBYa  
Worst       0.18154684    Trial     4 Q"nw.FjUG  
Mean        0.35770970 ]+3M\ ib  
Std Dev     0.11156454 qe&B$3D|  
law
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~;H,cPvrEg  
Compensator Statistics: !ehjLFS?_  
Change in back focus: oH?:(S(   
Minimum            :        -1.354815 vYb4&VV  
Maximum            :         1.611296 /j}Tv.'d  
Mean               :         0.161872 ?k
QY ^pU  
Standard Deviation :         0.869664 &]RE 5!  
njg0MZBqA  
90% >       0.20977951               fRLA;1va  
80% >       0.22748071               "0[`U(/  
50% >       0.38667627               o5DT1>h  
20% >       0.46553746               zPqJeYK  
10% >       0.50064115                ^uN[rHZ*u  
? ,s'UqR  
End of Run. y*{zX=]l<  
Q2r[^Z  
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 UE"v+GH  

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 J8r8#Zz  
@0P4pt;(  
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                 Xzg >/w 8J  
80% >       0.22748071                 B//*hH >F  
50% >       0.38667627                 6}N`YOJ.  
20% >       0.46553746                 >JE+g[$@  
10% >       0.50064115 Bc }o3oc  
2yn"K|  
最后这个数值是MTF值呢，还是MTF的公差？ L%Zr3Ct  
o"BED!/  
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？？？   K |=o-  
h'&<A_C-7  
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  : HFjSM~  
90% >       0.20977951                 ]SAY\;,_  
80% >       0.22748071                 7t<h 'g2  
50% >       0.38667627                 M {'(+a[  
20% >       0.46553746                 :D3:`P>,c  
10% >       0.50064115 ]m`:T  
....... whw+  

pFMjfWD,C  
<f:(nGj  
这些数值都是MTF值

Criterion           : Geometric MTF average S&T at 30.0000 cycles per mm   t5b cQ@Y  
Mode                : Sensitivities 5G'2 Wby'#  
Sampling            : 2 WN|_IJR~  
Nominal Criterion   : 0.54403234 \>"Zn7  
Test Wavelength     : 0.6328 v h)CB8  
+Q5'!@8  
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=D.s)ns*  
1=>b\"P#E  
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