[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 |;wc8;  
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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 %N<5ST>(  
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图片:2.jpg

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然后运行分析的结果如下： #[{{&sN  

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Analysis of Tolerances pS ](Emn`.  
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File : E:\光学设计资料\zemax练习\f500.ZMX 06f%{mAZS  
Title: ?`Yu~a{  
Date : TUE JUN 21 2011 w_Slg&S  
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Units are Millimeters. s"`~Xnf  
All changes are computed using linear differences. K_)~&Cu*'  
F8?2+w@P  
Paraxial Focus compensation only. Mu[lk=jC  
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WARNING: Solves should be removed prior to tolerancing. ,X^3.ILz  
1#,4P1"  
Mnemonics: s;OGb{H7  
TFRN: Tolerance on curvature in fringes. ITw *m3
 
TTHI: Tolerance on thickness. Zpkd8@g@  
TSDX: Tolerance on surface decentering in x. lK=Is v+  
TSDY: Tolerance on surface decentering in y. iF^qbh%%E  
TSTX: Tolerance on surface tilt in x (degrees). /f1]U LmC:  
TSTY: Tolerance on surface tilt in y (degrees). H%vfRl3rB  
TIRR: Tolerance on irregularity (fringes). l[$GOLeS  
TIND: Tolerance on Nd index of refraction. ]i.N'O<p  
TEDX: Tolerance on element decentering in x. l&+O*=#Hh  
TEDY: Tolerance on element decentering in y. z!3=.D
 
TETX: Tolerance on element tilt in x (degrees). 0>BxS9?w  
TETY: Tolerance on element tilt in y (degrees). .t1:;H b  
`CS\"|z  
WARNING: RAY AIMING IS OFF. Very loose tolerances may not be computed accurately. }S uj=oFp  
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WARNING: Boundary constraints on compensators will be ignored. H_RfIX)X  
\s*UUODWK  
Criterion           : Geometric MTF average S&T at 30.0000 cycles per mm #kM|!U=  
Mode                : Sensitivities {k3ItGQ_  
Sampling            : 2 mBErU6?X,A  
Nominal Criterion   : 0.54403234 i#*[, P~  
Test Wavelength     : 0.6328 :lB`K>)iB}  
o(SPT?ao~  
r&4Xf#QD6  
Fields: XY Symmetric Angle in degrees ]H !ru  
#      X-Field      Y-Field       Weight    VDX    VDY    VCX    VCY uMw6b=/U  
1   0.000E+000   0.000E+000   1.000E+000  0.000  0.000  0.000  0.000 }( F:U#  
;Yee0O!d4  
Sensitivity Analysis: #s~;ss ,  
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                 |----------------- Minimum ----------------| |----------------- Maximum ----------------| aG }oI!  
Type                      Value      Criterion        Change          Value      Criterion        Change ruGJZAhIA^  
Fringe tolerance on surface 1 A,_O=hA2I  
TFRN   1            -1.00000000     0.54257256    -0.00145977     1.00000000     0.54548607     0.00145374 fY&TI}Y  
Change in Focus                :      -0.000000                            0.000000 n\((#<&
 
Fringe tolerance on surface 2 =6dAF"b)  
TFRN   2            -1.00000000     0.54177471    -0.00225762     1.00000000     0.54627463     0.00224230 IQO|)53)  
Change in Focus                :       0.000000                            0.000000 bs
"J]">(N  
Fringe tolerance on surface 3 ^5E9p@d"J  
TFRN   3            -1.00000000     0.54779866     0.00376632     1.00000000     0.54022572    -0.00380662 kku<0<(N  
Change in Focus                :      -0.000000                            0.000000 v ^h:E  
Thickness tolerance on surface 1 g9" wX?*  
TTHI   1   3        -0.20000000     0.54321462    -0.00081772     0.20000000     0.54484759     0.00081525 [ *Dj:A)V^  
Change in Focus                :       0.000000                            0.000000 \lQ3j8U  
Thickness tolerance on surface 2 !ddyJJ^a  
TTHI   2   3        -0.20000000     0.54478712     0.00075478     0.20000000     0.54327558    -0.00075675 X3}eq|r9  
Change in Focus                :       0.000000                           -0.000000 k 3m_L-  
Decenter X tolerance on surfaces 1 through 3 rgVRF44X{  
TEDX   1   3        -0.20000000     0.54401464   -1.7700E-005     0.20000000     0.54401464   -1.7700E-005 x9Z89Gwi  
Change in Focus                :       0.000000                            0.000000 lk 1\|Q I  
Decenter Y tolerance on surfaces 1 through 3 /Ot3[B  
TEDY   1   3        -0.20000000     0.54401464   -1.7700E-005     0.20000000     0.54401464   -1.7700E-005 =\.*CY|;N  
Change in Focus                :       0.000000                            0.000000 Np+PUu>  
Tilt X tolerance on surfaces 1 through 3 (degrees) X=#us7W}  
TETX   1   3        -0.20000000     0.54897548     0.00494314     0.20000000     0.54897548     0.00494314 |)!f".`  
Change in Focus                :       0.000000                            0.000000 o+Jn
n"8  
Tilt Y tolerance on surfaces 1 through 3 (degrees) %!nI]|  
TETY   1   3        -0.20000000     0.54897548     0.00494314     0.20000000     0.54897548     0.00494314 >O\+9T@  
Change in Focus                :       0.000000                            0.000000 v](Y n)#  
Decenter X tolerance on surface 1 vQ*[tp#qU  
TSDX   1            -0.20000000     0.53999563    -0.00403671     0.20000000     0.53999563    -0.00403671 F^gTID  
Change in Focus                :       0.000000                            0.000000 ! eZls  
Decenter Y tolerance on surface 1 ni2#20L  
TSDY   1            -0.20000000     0.53999563    -0.00403671     0.20000000     0.53999563    -0.00403671 /8e}c`  
Change in Focus                :       0.000000                            0.000000 "M5  
Tilt X tolerance on surface (degrees) 1 8Ij<t{Lps  
TSTX   1            -0.20000000     0.42678383    -0.11724851     0.20000000     0.42678383    -0.11724851 @[J6JT*E  
Change in Focus                :       0.000000                            0.000000 d/9YtG%q  
Tilt Y tolerance on surface (degrees) 1 rByth,|  
TSTY   1            -0.20000000     0.42678383    -0.11724851     0.20000000     0.42678383    -0.11724851 Z}$sY>E  
Change in Focus                :       0.000000                            0.000000 ? #rXc%F  
Decenter X tolerance on surface 2 Eto"B"  
TSDX   2            -0.20000000     0.51705427    -0.02697807     0.20000000     0.51705427    -0.02697807 a5#G48'X  
Change in Focus                :       0.000000                            0.000000 -0CBMoe  
Decenter Y tolerance on surface 2 jcqUY+T$  
TSDY   2            -0.20000000     0.51705427    -0.02697807     0.20000000     0.51705427    -0.02697807 qt@/  
Change in Focus                :       0.000000                            0.000000 ym{@w3"S  
Tilt X tolerance on surface (degrees) 2 O(W"QY  
TSTX   2            -0.20000000     0.35349910    -0.19053324     0.20000000     0.35349910    -0.19053324 R/v|ZvI  
Change in Focus                :       0.000000                            0.000000 #1haq[Uv7  
Tilt Y tolerance on surface (degrees) 2 ;F258/J  
TSTY   2            -0.20000000     0.35349910    -0.19053324     0.20000000     0.35349910    -0.19053324 &AJ bx  
Change in Focus                :       0.000000                            0.000000 8S#$'2sT  
Decenter X tolerance on surface 3 UH>~Y N  
TSDX   3            -0.20000000     0.53419039    -0.00984195     0.20000000     0.53419039    -0.00984195 H*N<7#  
Change in Focus                :       0.000000                            0.000000 u"qu!EY2  
Decenter Y tolerance on surface 3 i6V$mhL  
TSDY   3            -0.20000000     0.53419039    -0.00984195     0.20000000     0.53419039    -0.00984195 DYf2V6'  
Change in Focus                :       0.000000                            0.000000 3`reXms*{  
Tilt X tolerance on surface (degrees) 3 &b#d4p6&l  
TSTX   3            -0.20000000     0.42861670    -0.11541563     0.20000000     0.42861670    -0.11541563 Sqn>L`L
z  
Change in Focus                :       0.000000                            0.000000 "y
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Tilt Y tolerance on surface (degrees) 3 DD=X{{;D\"  
TSTY   3            -0.20000000     0.42861670    -0.11541563     0.20000000     0.42861670    -0.11541563 r[V%DU$dj  
Change in Focus                :       0.000000                            0.000000 uNn1qV  
Irregularity of surface 1 in fringes ysOf=~1  
TIRR   1            -0.20000000     0.50973587    -0.03429647     0.20000000     0.57333868     0.02930634 ^rJTlh 9  
Change in Focus                :       0.000000                            0.000000 n'mrLZw  
Irregularity of surface 2 in fringes Ij(<(y{?Q1  
TIRR   2            -0.20000000     0.53400904    -0.01002330     0.20000000     0.55360281     0.00957047 IaeO0\ 4E  
Change in Focus                :       0.000000                            0.000000 9wR D=a  
Irregularity of surface 3 in fringes LKvX~68  
TIRR   3            -0.20000000     0.58078982     0.03675748     0.20000000     0.49904394    -0.04498840 _\d|`3RM  
Change in Focus                :       0.000000                            0.000000 1!^BcrG.  
Index tolerance on surface 1 6 EqN>.  
TIND   1            -0.00100000     0.52606778    -0.01796456     0.00100000     0.56121811     0.01718578 fSbLkd 9  
Change in Focus                :       0.000000                            0.000000 &$|~",  
Index tolerance on surface 2 2B$dT=G  
TIND   2            -0.00100000     0.55639086     0.01235852     0.00100000     0.53126361    -0.01276872 ?-c|c_|$  
Change in Focus                :       0.000000                           -0.000000 b~&cYk'  
%EU_OS(u.{  
Worst offenders: 8)8~c@  
Type                      Value      Criterion        Change R_G2C@y*  
TSTY   2            -0.20000000     0.35349910    -0.19053324  {8K  
TSTY   2             0.20000000     0.35349910    -0.19053324 bji#ID2]%  
TSTX   2            -0.20000000     0.35349910    -0.19053324 /rZk^/'  
TSTX   2             0.20000000     0.35349910    -0.19053324 u;9iuc`*  
TSTY   1            -0.20000000     0.42678383    -0.11724851 PJZ;wqTD_  
TSTY   1             0.20000000     0.42678383    -0.11724851 0 8L;u7u  
TSTX   1            -0.20000000     0.42678383    -0.11724851 "}_J"%  
TSTX   1             0.20000000     0.42678383    -0.11724851 5b rM..  
TSTY   3            -0.20000000     0.42861670    -0.11541563 liYsUmjZ=  
TSTY   3             0.20000000     0.42861670    -0.11541563 3Y#  
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Estimated Performance Changes based upon Root-Sum-Square method: 'G65zz  
Nominal MTF                 :     0.54403234 kKF=%J?X  
Estimated change            :    -0.36299231 Kv* 1=HES  
Estimated MTF               :     0.18104003 wm#(\dj  
#"6l+}  
Compensator Statistics: )*}\fmOv{  
Change in back focus: m)66g]F+  
Minimum            :        -0.000000 ?:/J8s [O  
Maximum            :         0.000000 iWeUsS%zpV  
Mean               :        -0.000000 b&!}SZ  
Standard Deviation :         0.000000 7a9">:~  
9K}DmS  
Monte Carlo Analysis: vVt
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Number of trials: 20 KLM6#6`  
kq=Htbv7  
Initial Statistics: Normal Distribution 4'D^>z!c  
5(#z)T  
  Trial       Criterion        Change !jl^__ .DR  
      1     0.42804416    -0.11598818 3q/"4D  
Change in Focus                :      -0.400171 O=U,x-Wl  
      2     0.54384387    -0.00018847 =55)|$hgD  
Change in Focus                :       1.018470 a`yCPnB(  
      3     0.44510003    -0.09893230 qDGx(d  
Change in Focus                :      -0.601922 M#2<|VUW,  
      4     0.18154684    -0.36248550 :@&e~QP(  
Change in Focus                :       0.920681 $o+@}B0)  
      5     0.28665820    -0.25737414 ;gEEdx'&T  
Change in Focus                :       1.253875 Ke^/aGi}O  
      6     0.21263372    -0.33139862 EIzTbW{p  
Change in Focus                :      -0.903878 ]z7pa^  
      7     0.40051424    -0.14351809 |b@`ykD  
Change in Focus                :      -1.354815 Yw=@*CK'  
      8     0.48754161    -0.05649072 Z-t qSw8n  
Change in Focus                :       0.215922 3U?gw!M>  
      9     0.40357468    -0.14045766 r9}(FL/)b  
Change in Focus                :       0.281783 ?_{{iil  
     10     0.26315315    -0.28087919 w@WtW8 p^  
Change in Focus                :      -1.048393 -d!84_d9  
     11     0.26120585    -0.28282649 IH*G
7;  
Change in Focus                :       1.017611 zLr:zfl  
     12     0.24033815    -0.30369419 l{rHXST|  
Change in Focus                :      -0.109292 nUq@`G  
     13     0.37164046    -0.17239188
<AVWT+,  
Change in Focus                :      -0.692430 6G4~-_  
     14     0.48597489    -0.05805744 D {E,XOi  
Change in Focus                :      -0.662040 q\P{h ij  
     15     0.21462327    -0.32940907 ow (YgM>t  
Change in Focus                :       1.611296 *W |  
     16     0.43378226    -0.11025008 4%v-)HGh  
Change in Focus                :      -0.640081 4UL"f<7 T  
     17     0.39321881    -0.15081353 /FTP8XHwL)  
Change in Focus                :       0.914906 \K2S.j  
     18     0.20692530    -0.33710703 3NwdE/x\  
Change in Focus                :       0.801607 }cW8B"_"  
     19     0.51374068    -0.03029165 qzY:>>d'  
Change in Focus                :       0.947293 p&XuNk  
     20     0.38013374    -0.16389860 p*$=EomY  
Change in Focus                :       0.667010 @B+8' b$9  
1iqgTi>  
Number of traceable Monte Carlo files generated: 20 ~EDO< O>3  
wMm+E "}W  
Nominal     0.54403234 2MXg)GBcU>  
Best        0.54384387    Trial     2 0^P9)<k'  
Worst       0.18154684    Trial     4 &z\?A2Mw%  
Mean        0.35770970 gvjy'Rm  
Std Dev     0.11156454 *Q-uE  
9Z2aFW9  
sN[<{;K4  
Compensator Statistics: 4[r:DM|8  
Change in back focus: vKbGG  
Minimum            :        -1.354815 4}Os>M{k  
Maximum            :         1.611296 ayf;'1  
Mean               :         0.161872 'Um\m  
Standard Deviation :         0.869664 ;cv\v(0  
!M6Km(>  
90% >       0.20977951               A8nf"mRD:  
80% >       0.22748071               p|>/Hz1v  
50% >       0.38667627               c@O7,y:`I  
20% >       0.46553746               \o?  
10% >       0.50064115                &~)1mnv.  
<UwA5X`0e.  
End of Run. rt! lc-g%/  
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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 OYfP!,+bn  

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 <
~5$<L4  
/ vzwokH  
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                 0 Pa\:^/6  
80% >       0.22748071                 `Df)wNN1  
50% >       0.38667627                 bX]$S 5c_u  
20% >       0.46553746                 yu62$d  
10% >       0.50064115 \c$!C8z  
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最后这个数值是MTF值呢，还是MTF的公差？ 9G}Crp  
TL_8c][.4$  
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？？？   H`ZUI8-  
`BHPjp>  
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  : kw>W5tNpf:  
90% >       0.20977951                 0
[JJ  
80% >       0.22748071                 +KV`+zic+  
50% >       0.38667627                 3%G>TB  
20% >       0.46553746                 _>8ZL)NQQ  
10% >       0.50064115 i[_WO2  
....... c|%.
B2  

6;g"`l51  
Y9)
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这些数值都是MTF值

Criterion           : Geometric MTF average S&T at 30.0000 cycles per mm   Wp"+\{@)  
Mode                : Sensitivities Nv@SpV'  
Sampling            : 2 B zmmE2~*  
Nominal Criterion   : 0.54403234  x w8 e  
Test Wavelength     : 0.6328 G=R`O1-3  
roDE?7x1  
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？ X}@^$'W  
zq1je2DB  
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