[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 RGz NZc  
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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 MD,+>kh  
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图片:2.jpg

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然后运行分析的结果如下： +^<-;/FZue  
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Analysis of Tolerances *,#T&M7D  
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File : E:\光学设计资料\zemax练习\f500.ZMX dZ{yNh.]  
Title: j7v?NY  
Date : TUE JUN 21 2011 G21cJi*  
zOT(>1'  
Units are Millimeters. ~]C m  
All changes are computed using linear differences. }1? 2  
`%Jq^uW  
Paraxial Focus compensation only. _su$]s  
<j&LC /]o  
WARNING: Solves should be removed prior to tolerancing. rF)[ Sed:T  
a6epew!2  
Mnemonics: D.Z4noMA6  
TFRN: Tolerance on curvature in fringes. {3){f;b  
TTHI: Tolerance on thickness. E;Q ,{{#  
TSDX: Tolerance on surface decentering in x. HN~  
TSDY: Tolerance on surface decentering in y. (@ixV$Y  
TSTX: Tolerance on surface tilt in x (degrees). rh$q]  
TSTY: Tolerance on surface tilt in y (degrees). 5/C#*%EH'  
TIRR: Tolerance on irregularity (fringes). `uLH3sr  
TIND: Tolerance on Nd index of refraction. KV]8o
'  
TEDX: Tolerance on element decentering in x. k \V6q9*  
TEDY: Tolerance on element decentering in y. IHStN,QD  
TETX: Tolerance on element tilt in x (degrees). _H)>U[  
TETY: Tolerance on element tilt in y (degrees). $|n#L6k  
<ecif_a=m  
WARNING: RAY AIMING IS OFF. Very loose tolerances may not be computed accurately. 25m!Bf  
JVt(!%K}&  
WARNING: Boundary constraints on compensators will be ignored. az;o7[rI^  
Ln@n6*%(/  
Criterion           : Geometric MTF average S&T at 30.0000 cycles per mm )Y 9JP@}T
 
Mode                : Sensitivities W=ar&O~}n  
Sampling            : 2 ).uR@j  
Nominal Criterion   : 0.54403234 ,{VC(/d  
Test Wavelength     : 0.6328 !/wR[`s9w  
}.74w0~0^  
BZ"+ ND9m_  
Fields: XY Symmetric Angle in degrees tZqy \_G  
#      X-Field      Y-Field       Weight    VDX    VDY    VCX    VCY uwhb-.w  
1   0.000E+000   0.000E+000   1.000E+000  0.000  0.000  0.000  0.000 /G& %T  
eZk4$y  
Sensitivity Analysis: %VmHw~xyF:  
s6.#uT7h  
                 |----------------- Minimum ----------------| |----------------- Maximum ----------------| cr"AK"TQ  
Type                      Value      Criterion        Change          Value      Criterion        Change {v~.zRW%]r  
Fringe tolerance on surface 1 C3z#A3&J  
TFRN   1            -1.00000000     0.54257256    -0.00145977     1.00000000     0.54548607     0.00145374 K6nGC  
Change in Focus                :      -0.000000                            0.000000 |}KNtIX\G  
Fringe tolerance on surface 2 NZ=`iA8)X  
TFRN   2            -1.00000000     0.54177471    -0.00225762     1.00000000     0.54627463     0.00224230 9>1Gj-S2:  
Change in Focus                :       0.000000                            0.000000 4Y:[YlfD.  
Fringe tolerance on surface 3 ,+hH|$  
TFRN   3            -1.00000000     0.54779866     0.00376632     1.00000000     0.54022572    -0.00380662 m[%
*O#_  
Change in Focus                :      -0.000000                            0.000000 M73d^
z  
Thickness tolerance on surface 1 >nOU 8  
TTHI   1   3        -0.20000000     0.54321462    -0.00081772     0.20000000     0.54484759     0.00081525 w|0w<K  
Change in Focus                :       0.000000                            0.000000 ;8J+Q0V  
Thickness tolerance on surface 2 wR*>9LjeG  
TTHI   2   3        -0.20000000     0.54478712     0.00075478     0.20000000     0.54327558    -0.00075675 FatLc|[  
Change in Focus                :       0.000000                           -0.000000 rXG?'jN  
Decenter X tolerance on surfaces 1 through 3 Kb5 YA  
TEDX   1   3        -0.20000000     0.54401464   -1.7700E-005     0.20000000     0.54401464   -1.7700E-005 $2lPUQZ<5  
Change in Focus                :       0.000000                            0.000000 2c4x=%  
Decenter Y tolerance on surfaces 1 through 3 v cZg3:j  
TEDY   1   3        -0.20000000     0.54401464   -1.7700E-005     0.20000000     0.54401464   -1.7700E-005 }vspjplk^  
Change in Focus                :       0.000000                            0.000000 C=uYX"  
Tilt X tolerance on surfaces 1 through 3 (degrees) k7\ ,No}  
TETX   1   3        -0.20000000     0.54897548     0.00494314     0.20000000     0.54897548     0.00494314 f9FLtdh \7  
Change in Focus                :       0.000000                            0.000000 s+l3]Hd  
Tilt Y tolerance on surfaces 1 through 3 (degrees) r[Zg$CW  
TETY   1   3        -0.20000000     0.54897548     0.00494314     0.20000000     0.54897548     0.00494314 K>x+*UPL  
Change in Focus                :       0.000000                            0.000000 ~L7@,d:  
Decenter X tolerance on surface 1 ERQc1G]3Dd  
TSDX   1            -0.20000000     0.53999563    -0.00403671     0.20000000     0.53999563    -0.00403671 /n&Y6@W  
Change in Focus                :       0.000000                            0.000000 oo{3-+ ?  
Decenter Y tolerance on surface 1 vk]vtjf&%  
TSDY   1            -0.20000000     0.53999563    -0.00403671     0.20000000     0.53999563    -0.00403671 'g7eN@Wh.z  
Change in Focus                :       0.000000                            0.000000 o2vBY]Tj  
Tilt X tolerance on surface (degrees) 1 1
Zj NRg=  
TSTX   1            -0.20000000     0.42678383    -0.11724851     0.20000000     0.42678383    -0.11724851 k;W`6:Kjp  
Change in Focus                :       0.000000                            0.000000 4<{]_S6"0y  
Tilt Y tolerance on surface (degrees) 1 :\<D q71  
TSTY   1            -0.20000000     0.42678383    -0.11724851     0.20000000     0.42678383    -0.11724851 ~.H*"  
Change in Focus                :       0.000000                            0.000000 %=GF  
Decenter X tolerance on surface 2 fu]mxGPc  
TSDX   2            -0.20000000     0.51705427    -0.02697807     0.20000000     0.51705427    -0.02697807 jJOs`'~Q\  
Change in Focus                :       0.000000                            0.000000 cN(Toj'`  
Decenter Y tolerance on surface 2
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TSDY   2            -0.20000000     0.51705427    -0.02697807     0.20000000     0.51705427    -0.02697807 M7JQw/,xs  
Change in Focus                :       0.000000                            0.000000 dqu+-43I|  
Tilt X tolerance on surface (degrees) 2 JX!@j3  
TSTX   2            -0.20000000     0.35349910    -0.19053324     0.20000000     0.35349910    -0.19053324 DbH"e
 
Change in Focus                :       0.000000                            0.000000 ^w(~gQ6|mP  
Tilt Y tolerance on surface (degrees) 2 'gQ0=6(\  
TSTY   2            -0.20000000     0.35349910    -0.19053324     0.20000000     0.35349910    -0.19053324 aF (L_  
Change in Focus                :       0.000000                            0.000000 ~R!M.gY[rK  
Decenter X tolerance on surface 3 B=p6pf  
TSDX   3            -0.20000000     0.53419039    -0.00984195     0.20000000     0.53419039    -0.00984195 2V6kCy@V  
Change in Focus                :       0.000000                            0.000000 4`M7 3k0  
Decenter Y tolerance on surface 3 wTw)GV4  
TSDY   3            -0.20000000     0.53419039    -0.00984195     0.20000000     0.53419039    -0.00984195 *eLKD_D`!C  
Change in Focus                :       0.000000                            0.000000 HZDeQx`*s  
Tilt X tolerance on surface (degrees) 3 Ub_!~tb}?  
TSTX   3            -0.20000000     0.42861670    -0.11541563     0.20000000     0.42861670    -0.11541563 j[e<CGZ  
Change in Focus                :       0.000000                            0.000000 ! O~:  
Tilt Y tolerance on surface (degrees) 3 Z|k>)pv@  
TSTY   3            -0.20000000     0.42861670    -0.11541563     0.20000000     0.42861670    -0.11541563 uz%<K(:Ov  
Change in Focus                :       0.000000                            0.000000 ?n0Z4 8%  
Irregularity of surface 1 in fringes C ks;f
6G  
TIRR   1            -0.20000000     0.50973587    -0.03429647     0.20000000     0.57333868     0.02930634 X{YY)}^  
Change in Focus                :       0.000000                            0.000000 *@1(!A  
Irregularity of surface 2 in fringes $2gX!)  
TIRR   2            -0.20000000     0.53400904    -0.01002330     0.20000000     0.55360281     0.00957047 4 [K"e{W3  
Change in Focus                :       0.000000                            0.000000 
v%2@M  
Irregularity of surface 3 in fringes E@(nKe&6T_  
TIRR   3            -0.20000000     0.58078982     0.03675748     0.20000000     0.49904394    -0.04498840 ?Xq"Q^o4#e  
Change in Focus                :       0.000000                            0.000000 xxS>O%  
Index tolerance on surface 1 CNkI9>L=W`  
TIND   1            -0.00100000     0.52606778    -0.01796456     0.00100000     0.56121811     0.01718578 Vhi4_~W3j]  
Change in Focus                :       0.000000                            0.000000 "AcC\iq  
Index tolerance on surface 2 Q%*987i  
TIND   2            -0.00100000     0.55639086     0.01235852     0.00100000     0.53126361    -0.01276872 )oU%++cdo  
Change in Focus                :       0.000000                           -0.000000 Nm.G,6<J  
|3{"ANmm'  
Worst offenders: ^S%xaA9  
Type                      Value      Criterion        Change %p t^
?  
TSTY   2            -0.20000000     0.35349910    -0.19053324 *+|,rcI  
TSTY   2             0.20000000     0.35349910    -0.19053324 !CGpE=V  
TSTX   2            -0.20000000     0.35349910    -0.19053324 FOS5?%J  
TSTX   2             0.20000000     0.35349910    -0.19053324 +~[>Usf  
TSTY   1            -0.20000000     0.42678383    -0.11724851 [0M`uf/u  
TSTY   1             0.20000000     0.42678383    -0.11724851 92 oUQ EK  
TSTX   1            -0.20000000     0.42678383    -0.11724851 Krw'|<  
TSTX   1             0.20000000     0.42678383    -0.11724851 CAT{)*xc  
TSTY   3            -0.20000000     0.42861670    -0.11541563 JV`"kk/  
TSTY   3             0.20000000     0.42861670    -0.11541563 qvs&*lBY  
,%X"Caz  
Estimated Performance Changes based upon Root-Sum-Square method: E3"j7y[S  
Nominal MTF                 :     0.54403234 ZR8
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Estimated change            :    -0.36299231 &ra2(S45  
Estimated MTF               :     0.18104003 WZ6'"Cz`  
\WPy9kRU  
Compensator Statistics: ?l>Ra0  
Change in back focus: vKFEA7  
Minimum            :        -0.000000 4o69t  
Maximum            :         0.000000 Xf%vfAf  
Mean               :        -0.000000 F6Ne?[b  
Standard Deviation :         0.000000 |QHIB?C?`  
UY}EW`$#m  
Monte Carlo Analysis: s^R$u"pFs  
Number of trials: 20 m8Y>4:Nw  
1/tyne=m  
Initial Statistics: Normal Distribution ym;I(TC+  
~oX`Gih  
  Trial       Criterion        Change Z/e^G f#i  
      1     0.42804416    -0.11598818 [O@U@bD9  
Change in Focus                :      -0.400171 q5G`N>"V  
      2     0.54384387    -0.00018847 B".3NQ  
Change in Focus                :       1.018470 =v(&qh9Q2  
      3     0.44510003    -0.09893230 's\rQ-TV  
Change in Focus                :      -0.601922 Ie7S'.Lmq  
      4     0.18154684    -0.36248550 ;;}}uW=  
Change in Focus                :       0.920681 b`fWT:?=  
      5     0.28665820    -0.25737414 $[U:Dk}  
Change in Focus                :       1.253875 6ee1^>  
      6     0.21263372    -0.33139862 UXPF"}S2
 
Change in Focus                :      -0.903878 t3<HE_B|  
      7     0.40051424    -0.14351809 qNX+!Y}y  
Change in Focus                :      -1.354815 f64}#E|w  
      8     0.48754161    -0.05649072 pebNE3`#  
Change in Focus                :       0.215922 WiqkC#N  
      9     0.40357468    -0.14045766 -#`tS  
Change in Focus                :       0.281783 2v{42]XYf  
     10     0.26315315    -0.28087919 ?6V U4nK/*  
Change in Focus                :      -1.048393 ,?c=v`e  
     11     0.26120585    -0.28282649 X3j|J/  
Change in Focus                :       1.017611 lFV\Go  
     12     0.24033815    -0.30369419 $VJE&b  
Change in Focus                :      -0.109292 X&gXhr#dL\  
     13     0.37164046    -0.17239188 BmFtRbR  
Change in Focus                :      -0.692430 <Q@{6  
     14     0.48597489    -0.05805744 r"W<1Hu  
Change in Focus                :      -0.662040 bC,SE*F\  
     15     0.21462327    -0.32940907 YDaGr6y4i  
Change in Focus                :       1.611296 :a*F>S!  
     16     0.43378226    -0.11025008 ow7*HN*  
Change in Focus                :      -0.640081 50^CILKo7  
     17     0.39321881    -0.15081353 7,3 g{
8  
Change in Focus                :       0.914906 hY/i)T{  
     18     0.20692530    -0.33710703 }w5`Oig[  
Change in Focus                :       0.801607 yPks,7U  
     19     0.51374068    -0.03029165 kf1 (  
Change in Focus                :       0.947293 (AT)w/  
     20     0.38013374    -0.16389860 DcsQ6  
Change in Focus                :       0.667010 (Eo#oX  
]ZS/9 $  
Number of traceable Monte Carlo files generated: 20 h{CMPJjD  
vFK!LeF%  
Nominal     0.54403234 ar
:qCq$\  
Best        0.54384387    Trial     2 i|N(=Z=  
Worst       0.18154684    Trial     4 W:1GY#Pe  
Mean        0.35770970 t<yOTVah  
Std Dev     0.11156454 bj=YFV+  
z<u@::  
I{7Hz{  
Compensator Statistics: t Z]b0T(e  
Change in back focus: _))--+cL  
Minimum            :        -1.354815 WZf}1.Mh*  
Maximum            :         1.611296 cpQhg-LY|  
Mean               :         0.161872 4p]hY!7  
Standard Deviation :         0.869664 aq$adPtu  
2rqYm6  
90% >       0.20977951               ktiC*|fd  
80% >       0.22748071               9m}c2:p  
50% >       0.38667627               qViolmDz  
20% >       0.46553746               N Bpf  
10% >       0.50064115                =aR
E  
e2Df@8>  
End of Run. =Cp}iM  
3ms{gZbw  
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 F}4jm,w  

图片:3.JPG

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CDGN}Q2_  
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 ek]CTUl*  
> 72qi*0  
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                 9|RR;k[  
80% >       0.22748071                 pTk1iGfB  
50% >       0.38667627                 gTwxmp.,  
20% >       0.46553746                 ,MdK "Qa>  
10% >       0.50064115 ^PI8Bvs>j  
l]v>PIh~N  
最后这个数值是MTF值呢，还是MTF的公差？ ,1&</R_  
ay,E!G&H  
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？？？   ({#M*=&"  
A?/(W_Gt^M  
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  : LnZC)cL P/  
90% >       0.20977951                 H]x-s  
80% >       0.22748071                 Dxlpo! ?#  
50% >       0.38667627                 JgmX=6N  
20% >       0.46553746                 R@8pKCL.  
10% >       0.50064115 ZcLW8L  
....... ,'f^K!iA   

0;V "64U  
}pMd/|A,  
这些数值都是MTF值

Criterion           : Geometric MTF average S&T at 30.0000 cycles per mm   1z5Oi u  
Mode                : Sensitivities nde_%d$  
Sampling            : 2 7a_tT;f;  
Nominal Criterion   : 0.54403234 :[r/ Y  
Test Wavelength     : 0.6328 NrK.DY4  
5Y(<T~  
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？ tg%#W`  
6
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&{+;  
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