[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 _V{WXsOx(  
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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 (cYc03"  
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图片:2.jpg

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然后运行分析的结果如下： ~9oS~fP?I  
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Analysis of Tolerances cp?`\P  
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File : E:\光学设计资料\zemax练习\f500.ZMX ^@)/VfV
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Title: =10t3nA1$  
Date : TUE JUN 21 2011 de

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XE$eHx3;  
Units are Millimeters. ]V@!kg(p8  
All changes are computed using linear differences. +nMgQOs  
o-O/MS
 
Paraxial Focus compensation only. ^s5.jlZr@  
fJE k
i>1  
WARNING: Solves should be removed prior to tolerancing.  ]NAPvw#p  
RFK N,oB  
Mnemonics: 2 yP#:T/z  
TFRN: Tolerance on curvature in fringes. $
LRFG(  
TTHI: Tolerance on thickness. TTE#7\K~B  
TSDX: Tolerance on surface decentering in x. jQ`"Op 3  
TSDY: Tolerance on surface decentering in y.  74Q?%X  
TSTX: Tolerance on surface tilt in x (degrees). (Z,,H1L  
TSTY: Tolerance on surface tilt in y (degrees). 6xFZv t  
TIRR: Tolerance on irregularity (fringes). ~+lC%R  
TIND: Tolerance on Nd index of refraction. "W+4`A(/l  
TEDX: Tolerance on element decentering in x. RycEM|51V  
TEDY: Tolerance on element decentering in y. Zo0&<QWj  
TETX: Tolerance on element tilt in x (degrees). C}1(@$  
TETY: Tolerance on element tilt in y (degrees). N'`*#UI+  
bY>o%L
L-  
WARNING: RAY AIMING IS OFF. Very loose tolerances may not be computed accurately. >M1/m=a  
n)K6Z{x  
WARNING: Boundary constraints on compensators will be ignored. OC>" +  
e2*^;&|%  
Criterion           : Geometric MTF average S&T at 30.0000 cycles per mm 2d>PN^x  
Mode                : Sensitivities Ti)n(G9$  
Sampling            : 2 XW#4C*5?d  
Nominal Criterion   : 0.54403234 .Nf*Yqs0  
Test Wavelength     : 0.6328 3?geJlD4  
MoX*e  
TRq~n7Y7C  
Fields: XY Symmetric Angle in degrees 8EE7mEmLH  
#      X-Field      Y-Field       Weight    VDX    VDY    VCX    VCY Ci*5E$+\  
1   0.000E+000   0.000E+000   1.000E+000  0.000  0.000  0.000  0.000 x9ws@=[:  
~T-.k 7t  
Sensitivity Analysis: _N]yI0k(  
hW},%  
                 |----------------- Minimum ----------------| |----------------- Maximum ----------------| eP2 yU  
Type                      Value      Criterion        Change          Value      Criterion        Change vB Jva8;Q  
Fringe tolerance on surface 1 *m"mt  
TFRN   1            -1.00000000     0.54257256    -0.00145977     1.00000000     0.54548607     0.00145374 A|&EI-In  
Change in Focus                :      -0.000000                            0.000000 /.?\P#9)  
Fringe tolerance on surface 2 1Jd:%+T  
TFRN   2            -1.00000000     0.54177471    -0.00225762     1.00000000     0.54627463     0.00224230 1=D!C lcb  
Change in Focus                :       0.000000                            0.000000 :qZ^<3+:  
Fringe tolerance on surface 3 )b7mzDp(  
TFRN   3            -1.00000000     0.54779866     0.00376632     1.00000000     0.54022572    -0.00380662 =['ijD4TW  
Change in Focus                :      -0.000000                            0.000000 cnc$^[c  
Thickness tolerance on surface 1 B 3h<K}  
TTHI   1   3        -0.20000000     0.54321462    -0.00081772     0.20000000     0.54484759     0.00081525 dg!sRm1iZ:  
Change in Focus                :       0.000000                            0.000000 |s^ar8)=)  
Thickness tolerance on surface 2 Yx%%+c?.  
TTHI   2   3        -0.20000000     0.54478712     0.00075478     0.20000000     0.54327558    -0.00075675 wTW"1M  
Change in Focus                :       0.000000                           -0.000000 #X8[g_d
/  
Decenter X tolerance on surfaces 1 through 3 4J_%quxO  
TEDX   1   3        -0.20000000     0.54401464   -1.7700E-005     0.20000000     0.54401464   -1.7700E-005 f65Sr"qB3  
Change in Focus                :       0.000000                            0.000000 'I~dJEW7  
Decenter Y tolerance on surfaces 1 through 3 H xlw1(zS  
TEDY   1   3        -0.20000000     0.54401464   -1.7700E-005     0.20000000     0.54401464   -1.7700E-005 9C.cz\E  
Change in Focus                :       0.000000                            0.000000 f LW>-O73  
Tilt X tolerance on surfaces 1 through 3 (degrees)
@bx2=  
TETX   1   3        -0.20000000     0.54897548     0.00494314     0.20000000     0.54897548     0.00494314 ~4^e a  
Change in Focus                :       0.000000                            0.000000 |<V{$),k  
Tilt Y tolerance on surfaces 1 through 3 (degrees) ?
4Lo"igAA  
TETY   1   3        -0.20000000     0.54897548     0.00494314     0.20000000     0.54897548     0.00494314 + ND9###  
Change in Focus                :       0.000000                            0.000000 3q>"#+R.t  
Decenter X tolerance on surface 1 ; M(}fV]  
TSDX   1            -0.20000000     0.53999563    -0.00403671     0.20000000     0.53999563    -0.00403671 _"bx#B*  
Change in Focus                :       0.000000                            0.000000 s7e'9Bx  
Decenter Y tolerance on surface 1 kMo)4Xp  
TSDY   1            -0.20000000     0.53999563    -0.00403671     0.20000000     0.53999563    -0.00403671 5Z[D(z  
Change in Focus                :       0.000000                            0.000000 qcot T\rq  
Tilt X tolerance on surface (degrees) 1 1fy{@j(W  
TSTX   1            -0.20000000     0.42678383    -0.11724851     0.20000000     0.42678383    -0.11724851 Esjv^* v9-  
Change in Focus                :       0.000000                            0.000000 F"=MU8  
Tilt Y tolerance on surface (degrees) 1 LZVO9e]  
TSTY   1            -0.20000000     0.42678383    -0.11724851     0.20000000     0.42678383    -0.11724851 P Cf|^X#B  
Change in Focus                :       0.000000                            0.000000 m&q;.|W  
Decenter X tolerance on surface 2 r
Lh h  
TSDX   2            -0.20000000     0.51705427    -0.02697807     0.20000000     0.51705427    -0.02697807 |-fx 0y   
Change in Focus                :       0.000000                            0.000000 xD=D *W  
Decenter Y tolerance on surface 2 5dF=DCZ  
TSDY   2            -0.20000000     0.51705427    -0.02697807     0.20000000     0.51705427    -0.02697807
a)1,/:7'  
Change in Focus                :       0.000000                            0.000000 ie!4z34  
Tilt X tolerance on surface (degrees) 2 ASvPr*q/  
TSTX   2            -0.20000000     0.35349910    -0.19053324     0.20000000     0.35349910    -0.19053324 IMZKlU3  
Change in Focus                :       0.000000                            0.000000 @_
Zx'mTI  
Tilt Y tolerance on surface (degrees) 2 &J b.OCf  
TSTY   2            -0.20000000     0.35349910    -0.19053324     0.20000000     0.35349910    -0.19053324 ~30Wb9eL  
Change in Focus                :       0.000000                            0.000000 WI6E3,ejB1  
Decenter X tolerance on surface 3 t}7wRTG  
TSDX   3            -0.20000000     0.53419039    -0.00984195     0.20000000     0.53419039    -0.00984195 rieQ&Jt"  
Change in Focus                :       0.000000                            0.000000 eFQi K6`i  
Decenter Y tolerance on surface 3 uFm-HR@4  
TSDY   3            -0.20000000     0.53419039    -0.00984195     0.20000000     0.53419039    -0.00984195 76b7-Nj"  
Change in Focus                :       0.000000                            0.000000 c)8wO=!  
Tilt X tolerance on surface (degrees) 3 1,T9HpM  
TSTX   3            -0.20000000     0.42861670    -0.11541563     0.20000000     0.42861670    -0.11541563 mz*z1`\7v\  
Change in Focus                :       0.000000                            0.000000 8ilbX)O  
Tilt Y tolerance on surface (degrees) 3 fhmr*E'J  
TSTY   3            -0.20000000     0.42861670    -0.11541563     0.20000000     0.42861670    -0.11541563 }dUC^04  
Change in Focus                :       0.000000                            0.000000 kA
4ei  
Irregularity of surface 1 in fringes FW DuH`-5  
TIRR   1            -0.20000000     0.50973587    -0.03429647     0.20000000     0.57333868     0.02930634 6bNW1]rD  
Change in Focus                :       0.000000                            0.000000 Q*.FUV&;  
Irregularity of surface 2 in fringes ]eW|}V7A:  
TIRR   2            -0.20000000     0.53400904    -0.01002330     0.20000000     0.55360281     0.00957047 0EOX@;}  
Change in Focus                :       0.000000                            0.000000 CD_f[u  
Irregularity of surface 3 in fringes aS
vE  
TIRR   3            -0.20000000     0.58078982     0.03675748     0.20000000     0.49904394    -0.04498840 #!jRY!2Vt  
Change in Focus                :       0.000000                            0.000000 Ij1]GZ`A(  
Index tolerance on surface 1 ~8(X@~Tn*  
TIND   1            -0.00100000     0.52606778    -0.01796456     0.00100000     0.56121811     0.01718578 N o(f0g.  
Change in Focus                :       0.000000                            0.000000 w<Cmzkf  
Index tolerance on surface 2 NE3wui1 V  
TIND   2            -0.00100000     0.55639086     0.01235852     0.00100000     0.53126361    -0.01276872
prN(V1O  
Change in Focus                :       0.000000                           -0.000000 `M ygDG+u  
^Nw]'e3  
Worst offenders: ?(q*U!=  
Type                      Value      Criterion        Change S=,1} XZ  
TSTY   2            -0.20000000     0.35349910    -0.19053324 Iv72;ZCh?6  
TSTY   2             0.20000000     0.35349910    -0.19053324 J&:W4\ m  
TSTX   2            -0.20000000     0.35349910    -0.19053324 l;*lPRoW,  
TSTX   2             0.20000000     0.35349910    -0.19053324 k6'#  
TSTY   1            -0.20000000     0.42678383    -0.11724851 wLSZL  
TSTY   1             0.20000000     0.42678383    -0.11724851 d7J[.^\  
TSTX   1            -0.20000000     0.42678383    -0.11724851 cqY.^f.  
TSTX   1             0.20000000     0.42678383    -0.11724851 6 ]PM!6  
TSTY   3            -0.20000000     0.42861670    -0.11541563 XDko{jEJ  
TSTY   3             0.20000000     0.42861670    -0.11541563 sBtG}Mo)  
Y@H,Lk  
Estimated Performance Changes based upon Root-Sum-Square method: }Tr83B|  
Nominal MTF                 :     0.54403234 B"m:<@ "  
Estimated change            :    -0.36299231 ~f10ZB_k>'  
Estimated MTF               :     0.18104003 :.o=F
`W  
T[h}A"yK;  
Compensator Statistics: xdf
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Change in back focus: 3B".Gsm)X  
Minimum            :        -0.000000 0ITA3v8{  
Maximum            :         0.000000 tH,K\v`f  
Mean               :        -0.000000 sN1*Zp'(  
Standard Deviation :         0.000000 f=_?<I{  
d]ZC8<`w  
Monte Carlo Analysis: x;FO|fH  
Number of trials: 20 *OOa)P{^D  
EO/cW<uV'  
Initial Statistics: Normal Distribution wYQ1Z  
Z#Zzi5<  
  Trial       Criterion        Change  ,eeL5V  
      1     0.42804416    -0.11598818 |369@un6  
Change in Focus                :      -0.400171 wGzXp5 dl  
      2     0.54384387    -0.00018847 xUo)_P\_  
Change in Focus                :       1.018470 Wytvs*\`  
      3     0.44510003    -0.09893230 m0A@jWgd  
Change in Focus                :      -0.601922 M-Z6TL  
      4     0.18154684    -0.36248550 ~I\r1Wj;  
Change in Focus                :       0.920681 im\YL<  
      5     0.28665820    -0.25737414 ?X_0Iy}1  
Change in Focus                :       1.253875 Gj7QGIKx  
      6     0.21263372    -0.33139862 2gL[\/s  
Change in Focus                :      -0.903878 *T>#zR{  
      7     0.40051424    -0.14351809 t66f 7AR  
Change in Focus                :      -1.354815 I6hhU;)C  
      8     0.48754161    -0.05649072 !v5sWVVR  
Change in Focus                :       0.215922 
GATP  
      9     0.40357468    -0.14045766 @0UwI
%.  
Change in Focus                :       0.281783 RM^?&PM85  
     10     0.26315315    -0.28087919 oj^5G ]_<  
Change in Focus                :      -1.048393 }U?gKlLg  
     11     0.26120585    -0.28282649
8g# Y  
Change in Focus                :       1.017611 N t>HztXd  
     12     0.24033815    -0.30369419 hDB
`t $  
Change in Focus                :      -0.109292 UOLTCp?M;J  
     13     0.37164046    -0.17239188 ##`;Eh0a  
Change in Focus                :      -0.692430 F`;TU"pDf  
     14     0.48597489    -0.05805744 GwMUIevO_  
Change in Focus                :      -0.662040 o^_W$4Fc  
     15     0.21462327    -0.32940907 f=_Bx2ub  
Change in Focus                :       1.611296 ]O[+c*|w  
     16     0.43378226    -0.11025008 @dE 3  
Change in Focus                :      -0.640081 q-3J.VLJ5H  
     17     0.39321881    -0.15081353 SA`J.4yn  
Change in Focus                :       0.914906 Pa+AF  
     18     0.20692530    -0.33710703 v E3{H  
Change in Focus                :       0.801607 c+E//X|  
     19     0.51374068    -0.03029165 6zp@#vYI  
Change in Focus                :       0.947293 ;Z!~A"~$>
 
     20     0.38013374    -0.16389860 F;?TR[4!k  
Change in Focus                :       0.667010 1&8j3"  
PtRj9TT  
Number of traceable Monte Carlo files generated: 20 uFrJ:l+  
u,Q_WR-wJ  
Nominal     0.54403234 s]F?=yEp  
Best        0.54384387    Trial     2 =0C l  
Worst       0.18154684    Trial     4 9LqMQv"xW  
Mean        0.35770970 OUlxeo/  
Std Dev     0.11156454 K)9j je  
V(lK`dY  
u:Af
HZ  
Compensator Statistics: %67G]?EXB  
Change in back focus: M]6w^\4j9  
Minimum            :        -1.354815 R<y Nv  
Maximum            :         1.611296 dr,B\.|jC  
Mean               :         0.161872 vu_>U({. T  
Standard Deviation :         0.869664 fw1;i  
xP{HjONu  
90% >       0.20977951               ~zE 1'  
80% >       0.22748071               Q8;x9o@p  
50% >       0.38667627               b[{m>Fa+o#  
20% >       0.46553746               $n=W2WJ6f  
10% >       0.50064115                ]/aRc=Gn  
P|unUW(P  
End of Run. S4l)TtY  
dp"<KcP_  
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 }|Hw0zP.  

图片:3.JPG

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rt5oRf:wY  
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 l]a^"4L4`o  
ILkjz^  
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                 Y h^WTysBn  
80% >       0.22748071                 <2n'}&F  
50% >       0.38667627                 o:Ln._bj  
20% >       0.46553746                 G i$  
10% >       0.50064115 48lzOG  
~wfoK7T}  
最后这个数值是MTF值呢，还是MTF的公差？ fy9uLl}h  
 =Ov9Kf  
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？？？   ^it4z gx@  
OZ eiHX!  
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  : _;#9!"&  
90% >       0.20977951                 s_TD4~ $  
80% >       0.22748071                 hw*1gm  
50% >       0.38667627                 (N7O+3+G  
20% >       0.46553746                 *G\=i A  
10% >       0.50064115 mLQUcYfR  
....... loLKm]yV  

Xty#vI  
.ByU  
这些数值都是MTF值

Criterion           : Geometric MTF average S&T at 30.0000 cycles per mm   I'?6~Sn3  
Mode                : Sensitivities 22|"K**3J|  
Sampling            : 2 -IbbPuRq  
Nominal Criterion   : 0.54403234 'Wtf>`  
Test Wavelength     : 0.6328 jx'
2N~$  
!:dL~n  
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？ ~o i)Lf1  
-<PC"B  
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