[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 wO%:WL$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 !l^AKn|  
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图片:2.jpg

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然后运行分析的结果如下： mh]$g<*m  
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Analysis of Tolerances /D+$|kmW]  
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File : E:\光学设计资料\zemax练习\f500.ZMX - S-1<xR  
Title: Th^#H  
Date : TUE JUN 21 2011 %MNV 5UA[w  
;#j82  
Units are Millimeters. i`'^ zR(`i  
All changes are computed using linear differences. Ti'kn{ Zv  
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Paraxial Focus compensation only. ^W'[l al.  
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WARNING: Solves should be removed prior to tolerancing. %T\x~)
 
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Mnemonics: }C.{+U  
TFRN: Tolerance on curvature in fringes. o hlVc%a  
TTHI: Tolerance on thickness. R?s\0  
TSDX: Tolerance on surface decentering in x. >t(@?*ZFT  
TSDY: Tolerance on surface decentering in y. ~\,6C1M  
TSTX: Tolerance on surface tilt in x (degrees). ![^h<Om  
TSTY: Tolerance on surface tilt in y (degrees). {Z.@-Tl_  
TIRR: Tolerance on irregularity (fringes). Am4(WXVQ  
TIND: Tolerance on Nd index of refraction. +r_[Tj|Er  
TEDX: Tolerance on element decentering in x. 7d)' y  
TEDY: Tolerance on element decentering in y. {[*_HAy7  
TETX: Tolerance on element tilt in x (degrees). zK?[dO  
TETY: Tolerance on element tilt in y (degrees). ]E^f8s0#V  
DA~ELje^j  
WARNING: RAY AIMING IS OFF. Very loose tolerances may not be computed accurately. y@_?3m7B=  
RiG!TTa b  
WARNING: Boundary constraints on compensators will be ignored. w-Fk&dC69  
A!yLwkc:5  
Criterion           : Geometric MTF average S&T at 30.0000 cycles per mm lJ#>Y5Qg  
Mode                : Sensitivities 8$Yf#;m[
 
Sampling            : 2 ze N!*VG  
Nominal Criterion   : 0.54403234 /|AuI qW  
Test Wavelength     : 0.6328 J7o?h9  
4V8wB}y7e  
,c l<74d  
Fields: XY Symmetric Angle in degrees k5(yf~!c  
#      X-Field      Y-Field       Weight    VDX    VDY    VCX    VCY _<Yo2,1^  
1   0.000E+000   0.000E+000   1.000E+000  0.000  0.000  0.000  0.000 |pSoBA9U  
MGDv4cFE.  
Sensitivity Analysis: b%j:-^0V  
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                 |----------------- Minimum ----------------| |----------------- Maximum ----------------| ZQA C&:  
Type                      Value      Criterion        Change          Value      Criterion        Change ]i2\2MTW8  
Fringe tolerance on surface 1 5AU3s  
TFRN   1            -1.00000000     0.54257256    -0.00145977     1.00000000     0.54548607     0.00145374 n4y6Ua9m{  
Change in Focus                :      -0.000000                            0.000000 b0 `9wn  
Fringe tolerance on surface 2 |Eu~=J7@  
TFRN   2            -1.00000000     0.54177471    -0.00225762     1.00000000     0.54627463     0.00224230 K9'*q3z  
Change in Focus                :       0.000000                            0.000000 I3Xh[% -!  
Fringe tolerance on surface 3 'U$VOq?!  
TFRN   3            -1.00000000     0.54779866     0.00376632     1.00000000     0.54022572    -0.00380662 :G/]rDtd  
Change in Focus                :      -0.000000                            0.000000 ,>v9 Y#U  
Thickness tolerance on surface 1 v*'\w#  
TTHI   1   3        -0.20000000     0.54321462    -0.00081772     0.20000000     0.54484759     0.00081525 ,5*xE\9G  
Change in Focus                :       0.000000                            0.000000 :exuTn  
Thickness tolerance on surface 2 E,yK` mPp^  
TTHI   2   3        -0.20000000     0.54478712     0.00075478     0.20000000     0.54327558    -0.00075675 (OQ @!R&  
Change in Focus                :       0.000000                           -0.000000 Z"Ni Y  
Decenter X tolerance on surfaces 1 through 3 #)}bUNc'  
TEDX   1   3        -0.20000000     0.54401464   -1.7700E-005     0.20000000     0.54401464   -1.7700E-005 m]q!y3  
Change in Focus                :       0.000000                            0.000000 2tm-:CPG  
Decenter Y tolerance on surfaces 1 through 3 'PYqp&gJ  
TEDY   1   3        -0.20000000     0.54401464   -1.7700E-005     0.20000000     0.54401464   -1.7700E-005 N\p]+[6  
Change in Focus                :       0.000000                            0.000000 v=-3 ,C  
Tilt X tolerance on surfaces 1 through 3 (degrees) ,s&~U<Z  
TETX   1   3        -0.20000000     0.54897548     0.00494314     0.20000000     0.54897548     0.00494314 Uy|=A7Ad c  
Change in Focus                :       0.000000                            0.000000 #q.G_-H4J@  
Tilt Y tolerance on surfaces 1 through 3 (degrees) { BL1j  
TETY   1   3        -0.20000000     0.54897548     0.00494314     0.20000000     0.54897548     0.00494314 '$-,;vnP0  
Change in Focus                :       0.000000                            0.000000 ?4Juw?  
Decenter X tolerance on surface 1 Q.dy $`\  
TSDX   1            -0.20000000     0.53999563    -0.00403671     0.20000000     0.53999563    -0.00403671 >I~
z7JS  
Change in Focus                :       0.000000                            0.000000 ^T6!z^g1h  
Decenter Y tolerance on surface 1 8w?\_P7QA  
TSDY   1            -0.20000000     0.53999563    -0.00403671     0.20000000     0.53999563    -0.00403671 i9U_r._qj;  
Change in Focus                :       0.000000                            0.000000 wNhR(M7  
Tilt X tolerance on surface (degrees) 1 D#}Yx]Q1  
TSTX   1            -0.20000000     0.42678383    -0.11724851     0.20000000     0.42678383    -0.11724851 /C2f;h(1  
Change in Focus                :       0.000000                            0.000000 ,GP4I3D  
Tilt Y tolerance on surface (degrees) 1 yUwgRj  
TSTY   1            -0.20000000     0.42678383    -0.11724851     0.20000000     0.42678383    -0.11724851 Ltd?
#HP  
Change in Focus                :       0.000000                            0.000000 L#q9_-(#  
Decenter X tolerance on surface 2 utJVuJw:t  
TSDX   2            -0.20000000     0.51705427    -0.02697807     0.20000000     0.51705427    -0.02697807 u;qMo`-  
Change in Focus                :       0.000000                            0.000000 \+Ln~\Sv  
Decenter Y tolerance on surface 2 pt
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TSDY   2            -0.20000000     0.51705427    -0.02697807     0.20000000     0.51705427    -0.02697807 2BA9T nxC  
Change in Focus                :       0.000000                            0.000000 ^6y4!='ci  
Tilt X tolerance on surface (degrees) 2 M8j(1&(:  
TSTX   2            -0.20000000     0.35349910    -0.19053324     0.20000000     0.35349910    -0.19053324 <`UG#6z8  
Change in Focus                :       0.000000                            0.000000 @Qjl`SL%O^  
Tilt Y tolerance on surface (degrees) 2  )\\V s>9  
TSTY   2            -0.20000000     0.35349910    -0.19053324     0.20000000     0.35349910    -0.19053324 ,T*_mDVY  
Change in Focus                :       0.000000                            0.000000 TM}'XZ&  
Decenter X tolerance on surface 3 gLMea:  
TSDX   3            -0.20000000     0.53419039    -0.00984195     0.20000000     0.53419039    -0.00984195 G_N-}J>EP  
Change in Focus                :       0.000000                            0.000000 yx w27~  
Decenter Y tolerance on surface 3 $"{3yLg  
TSDY   3            -0.20000000     0.53419039    -0.00984195     0.20000000     0.53419039    -0.00984195 B~g05`s  
Change in Focus                :       0.000000                            0.000000 #Y>%Dr&  
Tilt X tolerance on surface (degrees) 3 'Mx K}9  
TSTX   3            -0.20000000     0.42861670    -0.11541563     0.20000000     0.42861670    -0.11541563 bNpIC/#0K  
Change in Focus                :       0.000000                            0.000000 39aCwhh7v  
Tilt Y tolerance on surface (degrees) 3 Q>a7Ps@~  
TSTY   3            -0.20000000     0.42861670    -0.11541563     0.20000000     0.42861670    -0.11541563 n!eqzr{  
Change in Focus                :       0.000000                            0.000000 <*Kh=v  
Irregularity of surface 1 in fringes 'BdmFKy1  
TIRR   1            -0.20000000     0.50973587    -0.03429647     0.20000000     0.57333868     0.02930634 eGe[sv"k  
Change in Focus                :       0.000000                            0.000000  QXxLe*  
Irregularity of surface 2 in fringes Q] yT  
TIRR   2            -0.20000000     0.53400904    -0.01002330     0.20000000     0.55360281     0.00957047 lH@
E%  
Change in Focus                :       0.000000                            0.000000 _Z66[T+M  
Irregularity of surface 3 in fringes kbp( a+5  
TIRR   3            -0.20000000     0.58078982     0.03675748     0.20000000     0.49904394    -0.04498840 avt>saR  
Change in Focus                :       0.000000                            0.000000 &*]{"^  
Index tolerance on surface 1 _[vdY|_  
TIND   1            -0.00100000     0.52606778    -0.01796456     0.00100000     0.56121811     0.01718578 Tb0;Mbr  
Change in Focus                :       0.000000                            0.000000 H(G^O&ppdB  
Index tolerance on surface 2 oD#<?h)(  
TIND   2            -0.00100000     0.55639086     0.01235852     0.00100000     0.53126361    -0.01276872 u ?G\b{$m  
Change in Focus                :       0.000000                           -0.000000 y.*=Ww+  
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Worst offenders: ,*nZf|  
Type                      Value      Criterion        Change "^ 6lvZP(  
TSTY   2            -0.20000000     0.35349910    -0.19053324 DR yESi  
TSTY   2             0.20000000     0.35349910    -0.19053324 XL7;^AE^Wl  
TSTX   2            -0.20000000     0.35349910    -0.19053324 Ns!3- Y  
TSTX   2             0.20000000     0.35349910    -0.19053324 }L$Xb2^l  
TSTY   1            -0.20000000     0.42678383    -0.11724851 _{c|o{2sj  
TSTY   1             0.20000000     0.42678383    -0.11724851 0gOrW=  
TSTX   1            -0.20000000     0.42678383    -0.11724851 Ng'Z
AG;O  
TSTX   1             0.20000000     0.42678383    -0.11724851 lKV\1(`  
TSTY   3            -0.20000000     0.42861670    -0.11541563 `zzKD2y  
TSTY   3             0.20000000     0.42861670    -0.11541563 h/X5w4  
U.hERe~X  
Estimated Performance Changes based upon Root-Sum-Square method: Vy% :\p+  
Nominal MTF                 :     0.54403234 U%^eIXV|  
Estimated change            :    -0.36299231 b%[nB  
Estimated MTF               :     0.18104003 fZ6 fV=HEF  
7edPH3  
Compensator Statistics: &8Jg9#  
Change in back focus: /K,|k EE'n  
Minimum            :        -0.000000 n-hvh-ZO  
Maximum            :         0.000000 ;naq-%'Sg  
Mean               :        -0.000000 Wm$`ae   
Standard Deviation :         0.000000 P!FEh'.  
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Monte Carlo Analysis: 2]V>J  
Number of trials: 20 i[2bmd!H
 
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Initial Statistics: Normal Distribution 0
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  Trial       Criterion        Change # cN_y  
      1     0.42804416    -0.11598818 H}
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Change in Focus                :      -0.400171 c/<Sa|
'  
      2     0.54384387    -0.00018847 bB:r]*_ s]  
Change in Focus                :       1.018470 -Wlp=#9  
      3     0.44510003    -0.09893230 =&q-[JW  
Change in Focus                :      -0.601922 e8AjO$49  
      4     0.18154684    -0.36248550 Xq,UV  
Change in Focus                :       0.920681 M[YTk=IM#  
      5     0.28665820    -0.25737414 JO2ZS6k[  
Change in Focus                :       1.253875 =f4[=C$&`  
      6     0.21263372    -0.33139862 ':4}O#  
Change in Focus                :      -0.903878 r=~WMDCz@  
      7     0.40051424    -0.14351809 la\zaKC;>  
Change in Focus                :      -1.354815 %@lV-(5q  
      8     0.48754161    -0.05649072 Nm6Z|0S  
Change in Focus                :       0.215922 v[{8G^Z}54  
      9     0.40357468    -0.14045766 D!bKm[T  
Change in Focus                :       0.281783 *GbVMW[A>  
     10     0.26315315    -0.28087919 'yPCZ`5H(  
Change in Focus                :      -1.048393 eVw\v#gd  
     11     0.26120585    -0.28282649 9Z,*h-o  
Change in Focus                :       1.017611 E0"10Qbi  
     12     0.24033815    -0.30369419 lAdDu  
Change in Focus                :      -0.109292 bA@ /B'  
     13     0.37164046    -0.17239188 9VoDhsKk  
Change in Focus                :      -0.692430 ~L%Pz0Gg  
     14     0.48597489    -0.05805744 `fBG~NDw  
Change in Focus                :      -0.662040 V_&GYXx(J  
     15     0.21462327    -0.32940907 7FmbV/&c  
Change in Focus                :       1.611296 |SGgy|/a#  
     16     0.43378226    -0.11025008 nG"tO'J6  
Change in Focus                :      -0.640081 ?EI'^xg  
     17     0.39321881    -0.15081353 b8J@K"
 
Change in Focus                :       0.914906 )uQ-YC('0  
     18     0.20692530    -0.33710703 (jU/Wj!q  
Change in Focus                :       0.801607 1.# |QX  
     19     0.51374068    -0.03029165 #TMm#?lC  
Change in Focus                :       0.947293 :tRf@bD#  
     20     0.38013374    -0.16389860 )Y3EQxXa  
Change in Focus                :       0.667010 GWF/[%  
9z5\*b s  
Number of traceable Monte Carlo files generated: 20 k?3S  
TZ?Os4+  
Nominal     0.54403234 }J
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Best        0.54384387    Trial     2 01U *_\  
Worst       0.18154684    Trial     4 A2m_q>> !  
Mean        0.35770970 j*uXB^4  
Std Dev     0.11156454 9YP*f  
`J72+RA  
?h/xAl  
Compensator Statistics: 8YNu<   
Change in back focus: >(hSW~i~  
Minimum            :        -1.354815 Ne3R.g9;Z  
Maximum            :         1.611296 i 3m3zXt  
Mean               :         0.161872 v#  
Standard Deviation :         0.869664 QL2Nz@|k  
;W]D ~X&  
90% >       0.20977951               4L8z>9
D  
80% >       0.22748071               Lp_$?MCD.  
50% >       0.38667627               0y)}.'  
20% >       0.46553746               'eDJ@4Xm  
10% >       0.50064115                UQ/qBbn  
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End of Run. 94\t1fE  
&~RR&MdZ2  
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 BR+nL6sU  

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 #Mh{<gk%ax  
Ab/j(xr=  
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                 *5e+@rD`  
80% >       0.22748071                 RsW9:*R  
50% >       0.38667627                 YzAFC11,  
20% >       0.46553746                 'Hw4j:pS  
10% >       0.50064115 Q.+|xwz  
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最后这个数值是MTF值呢，还是MTF的公差？ - hzjV|  
&-%X:~|:X  
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？？？   4,G w#@  
Tv5g`/e=Ej  
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  : ;8
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90% >       0.20977951                 $gpG%Qj  
80% >       0.22748071                 KvPX=/&Zu  
50% >       0.38667627                 jZoNi  
20% >       0.46553746                 !0,Mp@ j/  
10% >       0.50064115 5S{7En~zUE  
....... 8}e,%
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kcie}Be  
,m=4@ofX  
这些数值都是MTF值

Criterion           : Geometric MTF average S&T at 30.0000 cycles per mm   9`//^8G:=  
Mode                : Sensitivities z+a%5J  
Sampling            : 2 )u]9193  
Nominal Criterion   : 0.54403234 Y
wY74w:  
Test Wavelength     : 0.6328 P +"Y  
b1XRC`Gy  
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？ rNjn~c  
=0;}K@(J  
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