[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 vX?MB  
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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 B|I9Ex~L  
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图片:2.jpg

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然后运行分析的结果如下： =:fN  
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Analysis of Tolerances fl@=h[g#t  
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File : E:\光学设计资料\zemax练习\f500.ZMX p9X{E%A<:  
Title: 7l%]O}!d)  
Date : TUE JUN 21 2011 {^8->V  
;r8< Ed
  
Units are Millimeters. xxy (#j$  
All changes are computed using linear differences. P55Q
E+B  
S[zETRSG  
Paraxial Focus compensation only. SHow~wxw  
jK(]eiR$S  
WARNING: Solves should be removed prior to tolerancing. WMi
$ATq  
"5wer5? t  
Mnemonics: 2|a5xTzH  
TFRN: Tolerance on curvature in fringes. iVaCXXf'  
TTHI: Tolerance on thickness. W^e"()d/Z  
TSDX: Tolerance on surface decentering in x. [LF<aR5  
TSDY: Tolerance on surface decentering in y. {)`tN&\  
TSTX: Tolerance on surface tilt in x (degrees). Uf,fd  
TSTY: Tolerance on surface tilt in y (degrees). B+VD53 V  
TIRR: Tolerance on irregularity (fringes). BT*z^ZH  
TIND: Tolerance on Nd index of refraction. 6lAHB*`  
TEDX: Tolerance on element decentering in x. cM?i _m  
TEDY: Tolerance on element decentering in y. Z>l%:;H  
TETX: Tolerance on element tilt in x (degrees). x*#9\*@EI  
TETY: Tolerance on element tilt in y (degrees). 'g5 Gdn  
wH0m^?a!3  
WARNING: RAY AIMING IS OFF. Very loose tolerances may not be computed accurately. zk++#rB  
w;p~|!  
WARNING: Boundary constraints on compensators will be ignored. )JsmzGC0  
?mi1PNps#  
Criterion           : Geometric MTF average S&T at 30.0000 cycles per mm ;h~
v,h  
Mode                : Sensitivities QK
HAN{hJ  
Sampling            : 2  rYI7V?  
Nominal Criterion   : 0.54403234 x{_3/4  
Test Wavelength     : 0.6328 EEJ OJ<  
%G`GdG}T  
|& Pa`=sp  
Fields: XY Symmetric Angle in degrees z)_h"y?H{%  
#      X-Field      Y-Field       Weight    VDX    VDY    VCX    VCY UJ?qGOM3x>  
1   0.000E+000   0.000E+000   1.000E+000  0.000  0.000  0.000  0.000 0ZAT;eaB  
b#[EkI 0@  
Sensitivity Analysis: 5H^"  
MszX9wl  
                 |----------------- Minimum ----------------| |----------------- Maximum ----------------| WKvG|YRDq  
Type                      Value      Criterion        Change          Value      Criterion        Change 'D
dR2  
Fringe tolerance on surface 1 y[A%EMd
  
TFRN   1            -1.00000000     0.54257256    -0.00145977     1.00000000     0.54548607     0.00145374 =}K"@5J  
Change in Focus                :      -0.000000                            0.000000 Dt~ |)L+  
Fringe tolerance on surface 2 MhL>6rn  
TFRN   2            -1.00000000     0.54177471    -0.00225762     1.00000000     0.54627463     0.00224230 =\FV_4)  
Change in Focus                :       0.000000                            0.000000 MJ_]N+  
Fringe tolerance on surface 3 _`~\zzUZ  
TFRN   3            -1.00000000     0.54779866     0.00376632     1.00000000     0.54022572    -0.00380662 ^rh{  
Change in Focus                :      -0.000000                            0.000000 e-EY]%JO  
Thickness tolerance on surface 1 ;r3Xh)k;  
TTHI   1   3        -0.20000000     0.54321462    -0.00081772     0.20000000     0.54484759     0.00081525 a,ZmDkzuv  
Change in Focus                :       0.000000                            0.000000 #V-0-n,`  
Thickness tolerance on surface 2 !v\_<8  
TTHI   2   3        -0.20000000     0.54478712     0.00075478     0.20000000     0.54327558    -0.00075675 MO%kUq|pg  
Change in Focus                :       0.000000                           -0.000000 0[In5II  
Decenter X tolerance on surfaces 1 through 3 P*:9u>  
TEDX   1   3        -0.20000000     0.54401464   -1.7700E-005     0.20000000     0.54401464   -1.7700E-005 De`p@`+<#~  
Change in Focus                :       0.000000                            0.000000 GX#SCZ&}C  
Decenter Y tolerance on surfaces 1 through 3 _j sJS<21  
TEDY   1   3        -0.20000000     0.54401464   -1.7700E-005     0.20000000     0.54401464   -1.7700E-005 | k?r1dj%O  
Change in Focus                :       0.000000                            0.000000 OzA'd\|  
Tilt X tolerance on surfaces 1 through 3 (degrees)  3PUyua'  
TETX   1   3        -0.20000000     0.54897548     0.00494314     0.20000000     0.54897548     0.00494314 ,a'Y^[4k?  
Change in Focus                :       0.000000                            0.000000 vE{L`,\q  
Tilt Y tolerance on surfaces 1 through 3 (degrees) .H#<yPty  
TETY   1   3        -0.20000000     0.54897548     0.00494314     0.20000000     0.54897548     0.00494314 fq<JX5DER  
Change in Focus                :       0.000000                            0.000000 Ba#wW E  
Decenter X tolerance on surface 1 ]9PQKC2&  
TSDX   1            -0.20000000     0.53999563    -0.00403671     0.20000000     0.53999563    -0.00403671 $I
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Change in Focus                :       0.000000                            0.000000 sLze/D_M*  
Decenter Y tolerance on surface 1 oY<R[NYKu  
TSDY   1            -0.20000000     0.53999563    -0.00403671     0.20000000     0.53999563    -0.00403671 z,K;GZuP  
Change in Focus                :       0.000000                            0.000000 Yaix\*II  
Tilt X tolerance on surface (degrees) 1 &rfl(&\oUi  
TSTX   1            -0.20000000     0.42678383    -0.11724851     0.20000000     0.42678383    -0.11724851 jBMGm"NE
 
Change in Focus                :       0.000000                            0.000000 srQ]TYH ,  
Tilt Y tolerance on surface (degrees) 1 z)F<{]%  
TSTY   1            -0.20000000     0.42678383    -0.11724851     0.20000000     0.42678383    -0.11724851 c
H48)  
Change in Focus                :       0.000000                            0.000000 0BrAgv"3a_  
Decenter X tolerance on surface 2 uW0Dm#  
TSDX   2            -0.20000000     0.51705427    -0.02697807     0.20000000     0.51705427    -0.02697807 B1i&HoGbz  
Change in Focus                :       0.000000                            0.000000 jz$ ]"\G#  
Decenter Y tolerance on surface 2 ?aWMU?S  
TSDY   2            -0.20000000     0.51705427    -0.02697807     0.20000000     0.51705427    -0.02697807 D^)?*(  
Change in Focus                :       0.000000                            0.000000 z(eAhK}6?  
Tilt X tolerance on surface (degrees) 2 $(fhO  
TSTX   2            -0.20000000     0.35349910    -0.19053324     0.20000000     0.35349910    -0.19053324 W)jtTC7  
Change in Focus                :       0.000000                            0.000000 lPZYd8  
Tilt Y tolerance on surface (degrees) 2 b Od<x >@  
TSTY   2            -0.20000000     0.35349910    -0.19053324     0.20000000     0.35349910    -0.19053324 n5+Z|<3)  
Change in Focus                :       0.000000                            0.000000 brEA-xNWQ  
Decenter X tolerance on surface 3 d#1yVdqR
l  
TSDX   3            -0.20000000     0.53419039    -0.00984195     0.20000000     0.53419039    -0.00984195 czg9tG8  
Change in Focus                :       0.000000                            0.000000 F[)5A5+:Y  
Decenter Y tolerance on surface 3 >/.w80<'  
TSDY   3            -0.20000000     0.53419039    -0.00984195     0.20000000     0.53419039    -0.00984195 2bu>j1h  
Change in Focus                :       0.000000                            0.000000 8/s?Gz  
Tilt X tolerance on surface (degrees) 3 O)$Pvll  
TSTX   3            -0.20000000     0.42861670    -0.11541563     0.20000000     0.42861670    -0.11541563 CK9FAuU  
Change in Focus                :       0.000000                            0.000000 .R]DT5  
Tilt Y tolerance on surface (degrees) 3 enT[#f[{  
TSTY   3            -0.20000000     0.42861670    -0.11541563     0.20000000     0.42861670    -0.11541563 3=-V!E  
Change in Focus                :       0.000000                            0.000000 !2F X l;  
Irregularity of surface 1 in fringes ZxB7H{  
TIRR   1            -0.20000000     0.50973587    -0.03429647     0.20000000     0.57333868     0.02930634 ]sZ! -q'8  
Change in Focus                :       0.000000                            0.000000 a.2Xl}2o5  
Irregularity of surface 2 in fringes mqK}yK^P]  
TIRR   2            -0.20000000     0.53400904    -0.01002330     0.20000000     0.55360281     0.00957047 YL&)@h  
Change in Focus                :       0.000000                            0.000000 i]15g@  
Irregularity of surface 3 in fringes ):
lH  
TIRR   3            -0.20000000     0.58078982     0.03675748     0.20000000     0.49904394    -0.04498840 ~@$RX:p  
Change in Focus                :       0.000000                            0.000000  7 T  
Index tolerance on surface 1 D{rM  
TIND   1            -0.00100000     0.52606778    -0.01796456     0.00100000     0.56121811     0.01718578 \l1==,wk  
Change in Focus                :       0.000000                            0.000000 y.$Ae1a=  
Index tolerance on surface 2 &embAqW:  
TIND   2            -0.00100000     0.55639086     0.01235852     0.00100000     0.53126361    -0.01276872 gy Ey=@L  
Change in Focus                :       0.000000                           -0.000000 6aKfcvf &  
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Worst offenders: *RM
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Type                      Value      Criterion        Change hgK 4;R  
TSTY   2            -0.20000000     0.35349910    -0.19053324 \}71pzw(  
TSTY   2             0.20000000     0.35349910    -0.19053324 tU0jFBB  
TSTX   2            -0.20000000     0.35349910    -0.19053324 l[<U UEjZJ  
TSTX   2             0.20000000     0.35349910    -0.19053324 8d7 NESYl  
TSTY   1            -0.20000000     0.42678383    -0.11724851 \V#
fl  
TSTY   1             0.20000000     0.42678383    -0.11724851 &%`WXe-`R  
TSTX   1            -0.20000000     0.42678383    -0.11724851 <Hr~|oG  
TSTX   1             0.20000000     0.42678383    -0.11724851 ;;|.qgxc~  
TSTY   3            -0.20000000     0.42861670    -0.11541563 C6'K)P[p  
TSTY   3             0.20000000     0.42861670    -0.11541563 %-woaj   
E[cH/Rm  
Estimated Performance Changes based upon Root-Sum-Square method: Lp)P7Yt-  
Nominal MTF                 :     0.54403234 xqb*;TBh*  
Estimated change            :    -0.36299231 SuXeUiK.[  
Estimated MTF               :     0.18104003 8Si3 aq3  
t:"3MiM=c  
Compensator Statistics: IGOEqUw*  
Change in back focus: b
XSAZWf  
Minimum            :        -0.000000 ( 8X^pL  
Maximum            :         0.000000 nS](d2  
Mean               :        -0.000000 IN75zn*%  
Standard Deviation :         0.000000 O(6j:XD  
x4K A8  
Monte Carlo Analysis: Iz[ohn!f  
Number of trials: 20 K#Zv>x!to  
~=Q^]y,  
Initial Statistics: Normal Distribution 6Yl+IP];i  
\CX6~  
  Trial       Criterion        Change XZ@|(_Z  
      1     0.42804416    -0.11598818 R.cR:fA  
Change in Focus                :      -0.400171 zdm2`D;~p  
      2     0.54384387    -0.00018847 bct8~dY  
Change in Focus                :       1.018470 JvK]EwR ;  
      3     0.44510003    -0.09893230 q~^!Ck+#*  
Change in Focus                :      -0.601922 p|?FA@ 3  
      4     0.18154684    -0.36248550 s(KSN/  
Change in Focus                :       0.920681 ^HxIy;EQ<z  
      5     0.28665820    -0.25737414 CXi[$nF3  
Change in Focus                :       1.253875 A$i^/hJs  
      6     0.21263372    -0.33139862 G\o9mEzQ  
Change in Focus                :      -0.903878 TbaZFLr  
      7     0.40051424    -0.14351809 d8iq9AP\o  
Change in Focus                :      -1.354815 &%%ix#iF  
      8     0.48754161    -0.05649072 :a^/&LbLm  
Change in Focus                :       0.215922 &isKU8n  
      9     0.40357468    -0.14045766
P)cEYk  
Change in Focus                :       0.281783 H~^)^6)^T  
     10     0.26315315    -0.28087919 }
V[ORGzox  
Change in Focus                :      -1.048393 `ZbFky{  
     11     0.26120585    -0.28282649 Ch\__t*v!  
Change in Focus                :       1.017611 QYi4A"$`  
     12     0.24033815    -0.30369419 7WwE] ^M  
Change in Focus                :      -0.109292 0?}n(f!S  
     13     0.37164046    -0.17239188 px*1 3"  
Change in Focus                :      -0.692430 ,ga6  
     14     0.48597489    -0.05805744 i4]oE&
G  
Change in Focus                :      -0.662040 g+5c"Yk+u~  
     15     0.21462327    -0.32940907 2v2XU\u{t  
Change in Focus                :       1.611296 k(M:#oA!  
     16     0.43378226    -0.11025008 C$0g2X  
Change in Focus                :      -0.640081 i(_A;TT6  
     17     0.39321881    -0.15081353 SZEi+CRs0  
Change in Focus                :       0.914906 NSBcYObX  
     18     0.20692530    -0.33710703 %~y>9K  
Change in Focus                :       0.801607 Ij$C@hH  
     19     0.51374068    -0.03029165 Io|D
u  
Change in Focus                :       0.947293 9?8PMh.  
     20     0.38013374    -0.16389860 ;1s+1G}_z  
Change in Focus                :       0.667010 +<
j7^AEG  
fvcS=nR
Qv  
Number of traceable Monte Carlo files generated: 20 0{g*\W*+~  
Bp3E)l  
Nominal     0.54403234 &!OEd]  
Best        0.54384387    Trial     2 DzQ  
Worst       0.18154684    Trial     4 DY9]$h*y  
Mean        0.35770970 I/%v`[  
Std Dev     0.11156454 6pSi-FH  
a&V;^ /  
fx(h fz  
Compensator Statistics: !?(7g2NP)  
Change in back focus: TS#[[^!S  
Minimum            :        -1.354815 _'LZf=V0  
Maximum            :         1.611296 m3TR}=n  
Mean               :         0.161872 NC#F:M;b  
Standard Deviation :         0.869664 __2<v?\  
h%krA<G9  
90% >       0.20977951               LP=j/qf|  
80% >       0.22748071               6,aH[>W  
50% >       0.38667627               @p L9a1PJv  
20% >       0.46553746               s4~[GO6>  
10% >       0.50064115                \ l#eW x  
X!p`|i  
End of Run. FO5a<6
 
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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 sVK?sBs]  

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 w
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Q-n8~Ey1a  
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                 "XR=P> xk  
80% >       0.22748071                 STp9Gh-  
50% >       0.38667627                 V4n~Z+k  
20% >       0.46553746                 +;
?mg(:  
10% >       0.50064115 kAQ(8xV  
V4:/LNq_]  
最后这个数值是MTF值呢，还是MTF的公差？ v
;x0=I&%  
v Y0bK-  
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？？？   P:"R;YCvE  
C\EIaLN<  
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  : E`)e ;^  
90% >       0.20977951                 [k7(t|Q{  
80% >       0.22748071                 8W&1"h`  
50% >       0.38667627                 'V&g"Pb  
20% >       0.46553746                 $H<_P'h-B  
10% >       0.50064115 V IzIl\<aM  
....... 0~nX
7
 

Zux L2W  
7P
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这些数值都是MTF值

Criterion           : Geometric MTF average S&T at 30.0000 cycles per mm   4rhHvp  
Mode                : Sensitivities !!.@F;]W  
Sampling            : 2 7{r7  
Nominal Criterion   : 0.54403234 >l0Qd1  
Test Wavelength     : 0.6328 {L$$"r,  
"-:H$  
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？ 4l0>['K&{  
1Ne;U/  
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