[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 ]mLTF',5  
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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 pl^"1Z=*  
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图片:2.jpg

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然后运行分析的结果如下： B,na  
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Analysis of Tolerances 'I01F:`  
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File : E:\光学设计资料\zemax练习\f500.ZMX m^u&g&^  
Title: $\J9F=<a  
Date : TUE JUN 21 2011 iJj?~\zp  
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Units are Millimeters. CFrHNU  
All changes are computed using linear differences. Vh[o[ U  
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Paraxial Focus compensation only. vgbjvyfN  
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WARNING: Solves should be removed prior to tolerancing. 1AEVZ@(j7  
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Mnemonics: VNEZBy"F  
TFRN: Tolerance on curvature in fringes. aKFA&Xnsl  
TTHI: Tolerance on thickness. */dsMa  
TSDX: Tolerance on surface decentering in x. 3ijI2Zy  
TSDY: Tolerance on surface decentering in y. 'L+BkE6+%  
TSTX: Tolerance on surface tilt in x (degrees). :W<,iqSCm  
TSTY: Tolerance on surface tilt in y (degrees). "Ohpb!J9  
TIRR: Tolerance on irregularity (fringes). ;7=JU^@D@  
TIND: Tolerance on Nd index of refraction. .AI'L|FQ%c  
TEDX: Tolerance on element decentering in x. H5MAN,`  
TEDY: Tolerance on element decentering in y. oX~$'/2v  
TETX: Tolerance on element tilt in x (degrees). U:p"IY#%  
TETY: Tolerance on element tilt in y (degrees). +T-zf@j  
vrO$8* sy  
WARNING: RAY AIMING IS OFF. Very loose tolerances may not be computed accurately. Bst>9V&R  
T9v#Jb6  
WARNING: Boundary constraints on compensators will be ignored. GyM%vGl 3  
5i-;bLm  
Criterion           : Geometric MTF average S&T at 30.0000 cycles per mm + d)~;I$  
Mode                : Sensitivities |[7$) $  
Sampling            : 2 1,!\7@<CT  
Nominal Criterion   : 0.54403234 92ww[+RQ@  
Test Wavelength     : 0.6328 6@*;Wk~  
4bjp*1*]  
2o}G<7r  
Fields: XY Symmetric Angle in degrees _N#3lU?  
#      X-Field      Y-Field       Weight    VDX    VDY    VCX    VCY MxA'T(Ay  
1   0.000E+000   0.000E+000   1.000E+000  0.000  0.000  0.000  0.000 6
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0guc00IN  
Sensitivity Analysis:
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                 |----------------- Minimum ----------------| |----------------- Maximum ----------------| tSLl'XeN  
Type                      Value      Criterion        Change          Value      Criterion        Change u,9U0ua@;  
Fringe tolerance on surface 1 ew ,edU  
TFRN   1            -1.00000000     0.54257256    -0.00145977     1.00000000     0.54548607     0.00145374 kAQZj3P]  
Change in Focus                :      -0.000000                            0.000000 2s ,n!u Fd  
Fringe tolerance on surface 2 NJ!#0[@C  
TFRN   2            -1.00000000     0.54177471    -0.00225762     1.00000000     0.54627463     0.00224230 [!efQap  
Change in Focus                :       0.000000                            0.000000 BQ)43Rr>  
Fringe tolerance on surface 3 n|2-bRK-  
TFRN   3            -1.00000000     0.54779866     0.00376632     1.00000000     0.54022572    -0.00380662 5!{g6=(  
Change in Focus                :      -0.000000                            0.000000 aT1W]i  
Thickness tolerance on surface 1 `mTxtuid{  
TTHI   1   3        -0.20000000     0.54321462    -0.00081772     0.20000000     0.54484759     0.00081525 eL4@% ]o  
Change in Focus                :       0.000000                            0.000000 g' U^fN  
Thickness tolerance on surface 2 ri V/wN9C  
TTHI   2   3        -0.20000000     0.54478712     0.00075478     0.20000000     0.54327558    -0.00075675 Y[]t_o)  
Change in Focus                :       0.000000                           -0.000000 T0)y5
  
Decenter X tolerance on surfaces 1 through 3 0|vWwZ
q  
TEDX   1   3        -0.20000000     0.54401464   -1.7700E-005     0.20000000     0.54401464   -1.7700E-005 hRcJ):Wyb  
Change in Focus                :       0.000000                            0.000000 9+|,aG s  
Decenter Y tolerance on surfaces 1 through 3 2Yjysn  
TEDY   1   3        -0.20000000     0.54401464   -1.7700E-005     0.20000000     0.54401464   -1.7700E-005 +6-!o,(  
Change in Focus                :       0.000000                            0.000000 YAG3PWmD  
Tilt X tolerance on surfaces 1 through 3 (degrees) )O(Gw-jWE  
TETX   1   3        -0.20000000     0.54897548     0.00494314     0.20000000     0.54897548     0.00494314 f TtMmz  
Change in Focus                :       0.000000                            0.000000 Q'M Ez  
Tilt Y tolerance on surfaces 1 through 3 (degrees) OB@t(KNx*P  
TETY   1   3        -0.20000000     0.54897548     0.00494314     0.20000000     0.54897548     0.00494314 ?q&mI*j!  
Change in Focus                :       0.000000                            0.000000 [6qP;  
Decenter X tolerance on surface 1 2xj`cFT  
TSDX   1            -0.20000000     0.53999563    -0.00403671     0.20000000     0.53999563    -0.00403671 p5BcDYOw`  
Change in Focus                :       0.000000                            0.000000 _( Cp   
Decenter Y tolerance on surface 1 55KL^+-~  
TSDY   1            -0.20000000     0.53999563    -0.00403671     0.20000000     0.53999563    -0.00403671 tC~itU=V  
Change in Focus                :       0.000000                            0.000000 {<BK@U  
Tilt X tolerance on surface (degrees) 1 \./2Qc,  
TSTX   1            -0.20000000     0.42678383    -0.11724851     0.20000000     0.42678383    -0.11724851 2p[3Ap  
Change in Focus                :       0.000000                            0.000000 |mA*[?ye@  
Tilt Y tolerance on surface (degrees) 1 yln.E vJjD  
TSTY   1            -0.20000000     0.42678383    -0.11724851     0.20000000     0.42678383    -0.11724851 |{"7/~*[  
Change in Focus                :       0.000000                            0.000000 B1.@K}  
Decenter X tolerance on surface 2 8RD)yRJ  
TSDX   2            -0.20000000     0.51705427    -0.02697807     0.20000000     0.51705427    -0.02697807 :AGQkJb  
Change in Focus                :       0.000000                            0.000000 :M`BVZ1t  
Decenter Y tolerance on surface 2 5E|2S_)G  
TSDY   2            -0.20000000     0.51705427    -0.02697807     0.20000000     0.51705427    -0.02697807 i*>yUav"  
Change in Focus                :       0.000000                            0.000000 ((q(Q9(F  
Tilt X tolerance on surface (degrees) 2 :]jtV~E\  
TSTX   2            -0.20000000     0.35349910    -0.19053324     0.20000000     0.35349910    -0.19053324  {`  
Change in Focus                :       0.000000                            0.000000 t9{EO#o'k  
Tilt Y tolerance on surface (degrees) 2 ajr8tp'  
TSTY   2            -0.20000000     0.35349910    -0.19053324     0.20000000     0.35349910    -0.19053324 @ U|u _S@  
Change in Focus                :       0.000000                            0.000000 (#`o>G(  
Decenter X tolerance on surface 3 =c4U%d2  
TSDX   3            -0.20000000     0.53419039    -0.00984195     0.20000000     0.53419039    -0.00984195 mg]dKp  
Change in Focus                :       0.000000                            0.000000 xn[di-LF  
Decenter Y tolerance on surface 3 C(hg"_W ou  
TSDY   3            -0.20000000     0.53419039    -0.00984195     0.20000000     0.53419039    -0.00984195 A/aQpEb%  
Change in Focus                :       0.000000                            0.000000 #1k,t  
Tilt X tolerance on surface (degrees) 3 T]`" Xl8  
TSTX   3            -0.20000000     0.42861670    -0.11541563     0.20000000     0.42861670    -0.11541563 v_h{_b8  
Change in Focus                :       0.000000                            0.000000 j=4>In?x  
Tilt Y tolerance on surface (degrees) 3 iDJ2dM}v  
TSTY   3            -0.20000000     0.42861670    -0.11541563     0.20000000     0.42861670    -0.11541563 ;wZ.p"T9^  
Change in Focus                :       0.000000                            0.000000 mD3#$E!A1  
Irregularity of surface 1 in fringes LPF?\mf ^4  
TIRR   1            -0.20000000     0.50973587    -0.03429647     0.20000000     0.57333868     0.02930634 rK
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Change in Focus                :       0.000000                            0.000000 WH*&MIjAr/  
Irregularity of surface 2 in fringes }X-ggO,  
TIRR   2            -0.20000000     0.53400904    -0.01002330     0.20000000     0.55360281     0.00957047 #u^d3 $Nj  
Change in Focus                :       0.000000                            0.000000 Sa5y7   
Irregularity of surface 3 in fringes RqR X  
TIRR   3            -0.20000000     0.58078982     0.03675748     0.20000000     0.49904394    -0.04498840 g-36Q~`9v  
Change in Focus                :       0.000000                            0.000000 GYO"1PM  
Index tolerance on surface 1 xH uyfQLk  
TIND   1            -0.00100000     0.52606778    -0.01796456     0.00100000     0.56121811     0.01718578 ?Fu.,srt  
Change in Focus                :       0.000000                            0.000000 AaVlNjB  
Index tolerance on surface 2 @}:(t{>;e7  
TIND   2            -0.00100000     0.55639086     0.01235852     0.00100000     0.53126361    -0.01276872 ;p8xL)mUP  
Change in Focus                :       0.000000                           -0.000000 pz+#1=b]  
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Worst offenders: *6DKUCA/  
Type                      Value      Criterion        Change 3@*8\  
TSTY   2            -0.20000000     0.35349910    -0.19053324 uQCS%|8C  
TSTY   2             0.20000000     0.35349910    -0.19053324 yFjSvm6  
TSTX   2            -0.20000000     0.35349910    -0.19053324 2z:9^a/]Na  
TSTX   2             0.20000000     0.35349910    -0.19053324 X
+R_TC  
TSTY   1            -0.20000000     0.42678383    -0.11724851 cxV3Vrx@A  
TSTY   1             0.20000000     0.42678383    -0.11724851 X*@Sj;|m  
TSTX   1            -0.20000000     0.42678383    -0.11724851 |>)mYLN!y  
TSTX   1             0.20000000     0.42678383    -0.11724851 -L@=j  
TSTY   3            -0.20000000     0.42861670    -0.11541563 }<p%PyM  
TSTY   3             0.20000000     0.42861670    -0.11541563 &CgD smJo#  
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Estimated Performance Changes based upon Root-Sum-Square method: wuCODz@~  
Nominal MTF                 :     0.54403234 nm..$QL  
Estimated change            :    -0.36299231 $1YnQgpT  
Estimated MTF               :     0.18104003 S3
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Compensator Statistics: qW*)]s)z  
Change in back focus: gueCP+a_  
Minimum            :        -0.000000 pB`<4+"9  
Maximum            :         0.000000 Flsf5 Tr0  
Mean               :        -0.000000 ZC"p^~U_e[  
Standard Deviation :         0.000000 H`sV\'`!}  
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Monte Carlo Analysis: \TjsXy=:)  
Number of trials: 20 "Z <1Msz  
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Initial Statistics: Normal Distribution hz!.|U@,{<  
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  Trial       Criterion        Change HzV3O-Qz]  
      1     0.42804416    -0.11598818 'a}pWkLB  
Change in Focus                :      -0.400171 :v#3;('7  
      2     0.54384387    -0.00018847 YRFM1?*  
Change in Focus                :       1.018470 \O56!,k  
      3     0.44510003    -0.09893230 gO29:L[t  
Change in Focus                :      -0.601922 9"[#\TW9Vb  
      4     0.18154684    -0.36248550 YvonZ  
Change in Focus                :       0.920681 ]*).3<Lw  
      5     0.28665820    -0.25737414 lq7
4Fz&(  
Change in Focus                :       1.253875 o}BaZ|iZ2  
      6     0.21263372    -0.33139862 WE\V<MGS/  
Change in Focus                :      -0.903878 IIzdCa{l  
      7     0.40051424    -0.14351809 z?7pn}-  
Change in Focus                :      -1.354815 b$hQB090  
      8     0.48754161    -0.05649072 @>?&Mw\c  
Change in Focus                :       0.215922 (c;$^xZK  
      9     0.40357468    -0.14045766 >Gkkr{s9  
Change in Focus                :       0.281783 .M04n\  
     10     0.26315315    -0.28087919 i9Qx{f88  
Change in Focus                :      -1.048393 uTQ/_$  
     11     0.26120585    -0.28282649 2!A/]
:[F  
Change in Focus                :       1.017611 SKGYmleR  
     12     0.24033815    -0.30369419 8d-_'MXk3  
Change in Focus                :      -0.109292 \%UA6uj  
     13     0.37164046    -0.17239188 %%*t{0!H+  
Change in Focus                :      -0.692430 I<DS
07K  
     14     0.48597489    -0.05805744 F[LBQI`zq  
Change in Focus                :      -0.662040 "[76>\'H  
     15     0.21462327    -0.32940907 Pt E>08  
Change in Focus                :       1.611296 LbnR=B!  
     16     0.43378226    -0.11025008 {JMFCc[  
Change in Focus                :      -0.640081 Pl U!-7  
     17     0.39321881    -0.15081353 QHOem=B  
Change in Focus                :       0.914906 P7Kp*He)  
     18     0.20692530    -0.33710703 K*>lq|iu  
Change in Focus                :       0.801607 _rOKif?5  
     19     0.51374068    -0.03029165 bPWIf*3#  
Change in Focus                :       0.947293 ))<3+^S0V\  
     20     0.38013374    -0.16389860
b2hB'!m  
Change in Focus                :       0.667010 uk16  
'F1NBL  
Number of traceable Monte Carlo files generated: 20 't
]=ps  
VUk2pEGO.  
Nominal     0.54403234 u9J;OsnHK  
Best        0.54384387    Trial     2 +c?1\{
M   
Worst       0.18154684    Trial     4 |nIm$
p'  
Mean        0.35770970 Ga"t4[=I  
Std Dev     0.11156454 7Q2"]f,$CQ  
!ce5pA  
!h4L_D0  
Compensator Statistics: <^{|5u  
Change in back focus: {x s{  
Minimum            :        -1.354815 >O?5mfMK  
Maximum            :         1.611296 ,*Jm\u  
Mean               :         0.161872 r!'\$(m E  
Standard Deviation :         0.869664 b+,u_$@B  
f3h^R20qmO  
90% >       0.20977951               5^+>*z  
80% >       0.22748071               YQLp#  
50% >       0.38667627               _Uc le  
20% >       0.46553746               hT]\*},  
10% >       0.50064115                %&0_0BU  
UoCFj2?C  
End of Run. se2ay_<F+  
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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 q3n(Z  

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 dX?8@uzu  
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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                 `tZm  
80% >       0.22748071                 XqX6UEVR4  
50% >       0.38667627                 "-bsWC  
20% >       0.46553746                 y(!J8(yA  
10% >       0.50064115 +a7J;-|  
2GkJ7cL  
最后这个数值是MTF值呢，还是MTF的公差？ oS.fy31p  
Cp{ j+Ia  
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？？？   jr,j1K@_t  
*>"k/XUn$  
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  : g(9\r  
90% >       0.20977951                 P[|FK(l  
80% >       0.22748071                 XI>|"*-l  
50% >       0.38667627                 ^4D7sS;~3  
20% >       0.46553746                 Qf?5"=:#  
10% >       0.50064115 *TacVp  
....... =e<;B_~.  

A(!nT=0o  
?k6PH"M  
这些数值都是MTF值

Criterion           : Geometric MTF average S&T at 30.0000 cycles per mm   J2c.J/o  
Mode                : Sensitivities 37#|
X*L  
Sampling            : 2 mY}_9rTn|  
Nominal Criterion   : 0.54403234 )kMA_\$,  
Test Wavelength     : 0.6328 @@
!Mt~\  
,34|_  
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？ _`Ojh0@00  
1l@gZI12#/  
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