[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 >|<8QomD  
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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,RBl  
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图片:2.jpg

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然后运行分析的结果如下： )^+v*=Dc-i  
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Analysis of Tolerances \~H;Wt5  

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File : E:\光学设计资料\zemax练习\f500.ZMX 7 4rmxjiN  
Title: k0|*8  
Date : TUE JUN 21 2011 6&(gp(F  
H \$04vkR  
Units are Millimeters. &I8,<(`  
All changes are computed using linear differences. MpbH!2J  
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Paraxial Focus compensation only. ^H'zS3S  
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WARNING: Solves should be removed prior to tolerancing. 1x+YgL5  
!ndc <],  
Mnemonics: <fX]`57Dc`  
TFRN: Tolerance on curvature in fringes. o[AQS`  
TTHI: Tolerance on thickness. E.v~<[g  
TSDX: Tolerance on surface decentering in x. ^FSUK  
TSDY: Tolerance on surface decentering in y. jKV,i?  
TSTX: Tolerance on surface tilt in x (degrees). ;^)(q<]  
TSTY: Tolerance on surface tilt in y (degrees). 7)zn[4v7qt  
TIRR: Tolerance on irregularity (fringes). /ZAS%_as  
TIND: Tolerance on Nd index of refraction. l 6wX18~XJ  
TEDX: Tolerance on element decentering in x. Ba/Z<1)  
TEDY: Tolerance on element decentering in y. z
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TETX: Tolerance on element tilt in x (degrees). [V`j@dV  
TETY: Tolerance on element tilt in y (degrees). pyK|zvr-r  
sMAc+9G9k  
WARNING: RAY AIMING IS OFF. Very loose tolerances may not be computed accurately. {.9phW4Vr?  
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WARNING: Boundary constraints on compensators will be ignored. (;=:QjaoZ  
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Criterion           : Geometric MTF average S&T at 30.0000 cycles per mm se](hu~w  
Mode                : Sensitivities kvh}{@|-  
Sampling            : 2 =Haqr*PDx  
Nominal Criterion   : 0.54403234 B\&;eZY'G  
Test Wavelength     : 0.6328 +r)'?zU  
 N7j  
-A}*Aa'\  
Fields: XY Symmetric Angle in degrees ~o`I[-g)  
#      X-Field      Y-Field       Weight    VDX    VDY    VCX    VCY q#B^yk|Y  
1   0.000E+000   0.000E+000   1.000E+000  0.000  0.000  0.000  0.000 &F"Mkyf  
4cK6B)X  
Sensitivity Analysis: qPdNI1 |  
0 1[LPN  
                 |----------------- Minimum ----------------| |----------------- Maximum ----------------| 'j=7'aX>K  
Type                      Value      Criterion        Change          Value      Criterion        Change  D/hQ{T  
Fringe tolerance on surface 1 E)|_7x<u  
TFRN   1            -1.00000000     0.54257256    -0.00145977     1.00000000     0.54548607     0.00145374 pYV$sDlD  
Change in Focus                :      -0.000000                            0.000000 yvo~'k#c  
Fringe tolerance on surface 2 03L"W^gc  
TFRN   2            -1.00000000     0.54177471    -0.00225762     1.00000000     0.54627463     0.00224230 uf,4GPo,  
Change in Focus                :       0.000000                            0.000000 <by}/lF0  
Fringe tolerance on surface 3 "iE9X.6NMu  
TFRN   3            -1.00000000     0.54779866     0.00376632     1.00000000     0.54022572    -0.00380662 p~M1}mE  
Change in Focus                :      -0.000000                            0.000000 =tl[?6  
Thickness tolerance on surface 1 MP,l*wVd  
TTHI   1   3        -0.20000000     0.54321462    -0.00081772     0.20000000     0.54484759     0.00081525 GqhnE>  
Change in Focus                :       0.000000                            0.000000 +v%V1lf^~  
Thickness tolerance on surface 2 +]Of f^s  
TTHI   2   3        -0.20000000     0.54478712     0.00075478     0.20000000     0.54327558    -0.00075675 zcItZP  
Change in Focus                :       0.000000                           -0.000000 P%>? O :a  
Decenter X tolerance on surfaces 1 through 3 [6qa"I
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TEDX   1   3        -0.20000000     0.54401464   -1.7700E-005     0.20000000     0.54401464   -1.7700E-005 ~,yHE3B\G  
Change in Focus                :       0.000000                            0.000000 _)Uw-vhQiT  
Decenter Y tolerance on surfaces 1 through 3 &9\z!r6mc  
TEDY   1   3        -0.20000000     0.54401464   -1.7700E-005     0.20000000     0.54401464   -1.7700E-005 PPT"?lt*&  
Change in Focus                :       0.000000                            0.000000 qWe1`.o  
Tilt X tolerance on surfaces 1 through 3 (degrees) J) v~  
TETX   1   3        -0.20000000     0.54897548     0.00494314     0.20000000     0.54897548     0.00494314 aR.1&3fE  
Change in Focus                :       0.000000                            0.000000 *!UY;InanX  
Tilt Y tolerance on surfaces 1 through 3 (degrees) w3:WvA5jt  
TETY   1   3        -0.20000000     0.54897548     0.00494314     0.20000000     0.54897548     0.00494314 { 'Hi_b3  
Change in Focus                :       0.000000                            0.000000 dz.]5R  
Decenter X tolerance on surface 1 Ojp)OeF\  
TSDX   1            -0.20000000     0.53999563    -0.00403671     0.20000000     0.53999563    -0.00403671 rKq/=Avv  
Change in Focus                :       0.000000                            0.000000 %*P59%  
Decenter Y tolerance on surface 1 !c:Q+:,H  
TSDY   1            -0.20000000     0.53999563    -0.00403671     0.20000000     0.53999563    -0.00403671 Rk^Fasg"  
Change in Focus                :       0.000000                            0.000000 qEKTSet?  
Tilt X tolerance on surface (degrees) 1 ,.tT9? m  
TSTX   1            -0.20000000     0.42678383    -0.11724851     0.20000000     0.42678383    -0.11724851 H V<|eL #  
Change in Focus                :       0.000000                            0.000000 wo7.y["$  
Tilt Y tolerance on surface (degrees) 1 AY:3o3M  
TSTY   1            -0.20000000     0.42678383    -0.11724851     0.20000000     0.42678383    -0.11724851 Mw
7!w-1+  
Change in Focus                :       0.000000                            0.000000 c\U
VMyE  
Decenter X tolerance on surface 2 @lAOi1m,,  
TSDX   2            -0.20000000     0.51705427    -0.02697807     0.20000000     0.51705427    -0.02697807 =If% m9  
Change in Focus                :       0.000000                            0.000000 nL@ "FZ`(  
Decenter Y tolerance on surface 2 4NbX!"0  
TSDY   2            -0.20000000     0.51705427    -0.02697807     0.20000000     0.51705427    -0.02697807 )eGGA6G  
Change in Focus                :       0.000000                            0.000000 bv0B  
Tilt X tolerance on surface (degrees) 2 n1o/-UY  
TSTX   2            -0.20000000     0.35349910    -0.19053324     0.20000000     0.35349910    -0.19053324 B?-RzWB\3  
Change in Focus                :       0.000000                            0.000000 ;OmmXygl  
Tilt Y tolerance on surface (degrees) 2 X`]-)(UX  
TSTY   2            -0.20000000     0.35349910    -0.19053324     0.20000000     0.35349910    -0.19053324 !U}A1)  
Change in Focus                :       0.000000                            0.000000 nul?5{z@  
Decenter X tolerance on surface 3 C<fWDLwYqV  
TSDX   3            -0.20000000     0.53419039    -0.00984195     0.20000000     0.53419039    -0.00984195 +FQ:Q+  
Change in Focus                :       0.000000                            0.000000 ];6c/#2x  
Decenter Y tolerance on surface 3 k);z}`7  
TSDY   3            -0.20000000     0.53419039    -0.00984195     0.20000000     0.53419039    -0.00984195 QRdNi1&M  
Change in Focus                :       0.000000                            0.000000 7Upm  
Tilt X tolerance on surface (degrees) 3 m\7-/e2a  
TSTX   3            -0.20000000     0.42861670    -0.11541563     0.20000000     0.42861670    -0.11541563 M$-4.+G  
Change in Focus                :       0.000000                            0.000000 u#%Ig3  
Tilt Y tolerance on surface (degrees) 3 xPb;_~  
TSTY   3            -0.20000000     0.42861670    -0.11541563     0.20000000     0.42861670    -0.11541563 m{!BSl  
Change in Focus                :       0.000000                            0.000000 L@S"c (  
Irregularity of surface 1 in fringes 5}9-)\8=z  
TIRR   1            -0.20000000     0.50973587    -0.03429647     0.20000000     0.57333868     0.02930634 [6 wI22  
Change in Focus                :       0.000000                            0.000000 3X
Y$w&f  
Irregularity of surface 2 in fringes r\vB-nJ  
TIRR   2            -0.20000000     0.53400904    -0.01002330     0.20000000     0.55360281     0.00957047 Ql%7wrK  
Change in Focus                :       0.000000                            0.000000 n=r}jR
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Irregularity of surface 3 in fringes Vv' e,m  
TIRR   3            -0.20000000     0.58078982     0.03675748     0.20000000     0.49904394    -0.04498840 (y^oGY;  
Change in Focus                :       0.000000                            0.000000 *x`z5_yfO  
Index tolerance on surface 1 y4
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TIND   1            -0.00100000     0.52606778    -0.01796456     0.00100000     0.56121811     0.01718578 ogMLv}  
Change in Focus                :       0.000000                            0.000000 O 4N_lr~  
Index tolerance on surface 2 <,Sy:>:"  
TIND   2            -0.00100000     0.55639086     0.01235852     0.00100000     0.53126361    -0.01276872 @S?.`o  
Change in Focus                :       0.000000                           -0.000000 /}2 bsiJT  
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Worst offenders: <Nvw w  
Type                      Value      Criterion        Change WRh&4[G'  
TSTY   2            -0.20000000     0.35349910    -0.19053324 Jl Q%+$  
TSTY   2             0.20000000     0.35349910    -0.19053324 E{T\51V]%  
TSTX   2            -0.20000000     0.35349910    -0.19053324 A/{pG#if]3  
TSTX   2             0.20000000     0.35349910    -0.19053324 uByF*}d1  
TSTY   1            -0.20000000     0.42678383    -0.11724851 #i ?@S$  
TSTY   1             0.20000000     0.42678383    -0.11724851 #1hT#YN  
TSTX   1            -0.20000000     0.42678383    -0.11724851 10}oaL S  
TSTX   1             0.20000000     0.42678383    -0.11724851 KwPJ0 ]('_  
TSTY   3            -0.20000000     0.42861670    -0.11541563 rZu_"bcJ  
TSTY   3             0.20000000     0.42861670    -0.11541563 k}ps-w6:  
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Estimated Performance Changes based upon Root-Sum-Square method: 2-llT
 
Nominal MTF                 :     0.54403234 MGc=TQ.  
Estimated change            :    -0.36299231 jm RYL
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Estimated MTF               :     0.18104003 ;DC0LJ  
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Compensator Statistics: KblOP{I  
Change in back focus: -/x +M-X#  
Minimum            :        -0.000000 m80+b8b  
Maximum            :         0.000000 "1%<IqpU+  
Mean               :        -0.000000 :1_hQeq  
Standard Deviation :         0.000000 |r}%AN6+  
IS&`O=7  
Monte Carlo Analysis: vlyq2>TfR  
Number of trials: 20 YtW#MG$f  
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Initial Statistics: Normal Distribution ?[RG8,B  
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  Trial       Criterion        Change Redp'rXT<h  
      1     0.42804416    -0.11598818 [2i+f<  
Change in Focus                :      -0.400171 MF 5w.@62X  
      2     0.54384387    -0.00018847 4Xz6JJ1U[H  
Change in Focus                :       1.018470 *!Am6\+  
      3     0.44510003    -0.09893230 |\QR9>  
Change in Focus                :      -0.601922 + W@r p#  
      4     0.18154684    -0.36248550 W3<O+S&  
Change in Focus                :       0.920681 d.2b7q09  
      5     0.28665820    -0.25737414 07(E/A]  
Change in Focus                :       1.253875 yqejd_cd  
      6     0.21263372    -0.33139862 6\5U%
~78  
Change in Focus                :      -0.903878 Hkg@M?(  
      7     0.40051424    -0.14351809 H5&>Eny  
Change in Focus                :      -1.354815 7[D0n7B@  
      8     0.48754161    -0.05649072 *D AgcB  
Change in Focus                :       0.215922 _'I9rGlx3  
      9     0.40357468    -0.14045766 _ <>+Dk&  
Change in Focus                :       0.281783 UBqK$2 #  
     10     0.26315315    -0.28087919 T^sxR4F  
Change in Focus                :      -1.048393 %i.|bIhmm  
     11     0.26120585    -0.28282649 T{)!>)  
Change in Focus                :       1.017611 6:B5PJq  
     12     0.24033815    -0.30369419 @J
r  
Change in Focus                :      -0.109292 8z/^Ql  
     13     0.37164046    -0.17239188 N.64aL|1  
Change in Focus                :      -0.692430 kk~{2  
     14     0.48597489    -0.05805744  fx;5j;  
Change in Focus                :      -0.662040 mceSUKI;L  
     15     0.21462327    -0.32940907 SN]/~>/  
Change in Focus                :       1.611296 qWanr7n]@  
     16     0.43378226    -0.11025008 [w{ZP4d>  
Change in Focus                :      -0.640081 ZzKn,+  
     17     0.39321881    -0.15081353 sm_:M| [D  
Change in Focus                :       0.914906 qS2%U?S7  
     18     0.20692530    -0.33710703 =pk'a_P8-  
Change in Focus                :       0.801607 :lE7v~!Z  
     19     0.51374068    -0.03029165 I7uYsjh@u  
Change in Focus                :       0.947293 ko5\*!|:lj  
     20     0.38013374    -0.16389860 #e|eWi>  
Change in Focus                :       0.667010 ~(Tz <  
{>+$u"*  
Number of traceable Monte Carlo files generated: 20 ]-}a{z  
#t/Q4X +  
Nominal     0.54403234 TuF:m"4  
Best        0.54384387    Trial     2 ;m5M:Z"  
Worst       0.18154684    Trial     4 i
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6R  
Mean        0.35770970 yr=r?h}  
Std Dev     0.11156454 yq<YGNy!  
%]R#}amW  
YLCwo]\+>  
Compensator Statistics: :?p{ga9  
Change in back focus: xO.7cSqgw  
Minimum            :        -1.354815 ;=7z!:)  
Maximum            :         1.611296 }`MO}Pz  
Mean               :         0.161872 #E ~FF@a  
Standard Deviation :         0.869664 t]` 2f3UO  
0)/214^&  
90% >       0.20977951               )F~_KD)7jJ  
80% >       0.22748071               Y{O&-5H^|  
50% >       0.38667627               Ym6ec|9;  
20% >       0.46553746               $bo^UYZ6  
10% >       0.50064115                gO/(/e>P  
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End of Run. 2tbqmWw/s  
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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 cpy"1=K~M  

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 |`okIqp  
=QC^7T  
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                 V9VP"kD  
80% >       0.22748071                 6:,^CI|@t  
50% >       0.38667627                 9X%Klm 5w  
20% >       0.46553746                 _E;Y ~I,i  
10% >       0.50064115 v2{O67j} o  
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最后这个数值是MTF值呢，还是MTF的公差？ ]'Yw#YB  
/RM-+D:Y  
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？？？   @>]3xHE6#=  

kut|A  
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  : 9jGuelwN  
90% >       0.20977951                 d[e:}1  
80% >       0.22748071                 k(z<Bm  
50% >       0.38667627                 Z,!Xxv;4  
20% >       0.46553746                 1{x~iZa  
10% >       0.50064115 ASZ5;N4u  
....... yj'' \  

;K\N  

hYc{9$  
这些数值都是MTF值

Criterion           : Geometric MTF average S&T at 30.0000 cycles per mm   j(6$7+2qN  
Mode                : Sensitivities *76viqY;dE  
Sampling            : 2 G:c8`*5Q  
Nominal Criterion   : 0.54403234 HS
6Imi  
Test Wavelength     : 0.6328 4ZJT[zi  

SXBQ  
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？ =EcIXDzC>  
sh !~T<yy  
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