[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 rQ6>*0xL_  
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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 D #7q3s  
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图片:2.jpg

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然后运行分析的结果如下： Z6Z/Y()4Tl  
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Analysis of Tolerances ?GtI.flV  
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File : E:\光学设计资料\zemax练习\f500.ZMX QAMcI:5  
Title: e 'F:LMX  
Date : TUE JUN 21 2011 V]"pM]>3X  
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Units are Millimeters. 94]i|2qj*  
All changes are computed using linear differences. 5*Qzw[[=  
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Paraxial Focus compensation only. (ip3{d{CT]  
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WARNING: Solves should be removed prior to tolerancing. qn,fx6v4  
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Mnemonics: wehiX7y  
TFRN: Tolerance on curvature in fringes. *J >6i2M,u  
TTHI: Tolerance on thickness. "3|OB, <;:  
TSDX: Tolerance on surface decentering in x. &&m1_K  
TSDY: Tolerance on surface decentering in y. NS TO\36  
TSTX: Tolerance on surface tilt in x (degrees). J!dv"Ww"  
TSTY: Tolerance on surface tilt in y (degrees). A:(qF.Tm  
TIRR: Tolerance on irregularity (fringes). I)0_0JXs  
TIND: Tolerance on Nd index of refraction. Tj\hAcD  
TEDX: Tolerance on element decentering in x. h?}S|>9  
TEDY: Tolerance on element decentering in y. l Ft&cy2  
TETX: Tolerance on element tilt in x (degrees). B[ D s?:  
TETY: Tolerance on element tilt in y (degrees). Snp(&TD<<  
=UWW(^M#[:  
WARNING: RAY AIMING IS OFF. Very loose tolerances may not be computed accurately. h0$ \JXk  
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WARNING: Boundary constraints on compensators will be ignored. ,^<39ng  
1,U)rx$H  
Criterion           : Geometric MTF average S&T at 30.0000 cycles per mm 86dz Jh  
Mode                : Sensitivities @+)T"5_Y[  
Sampling            : 2 "Vp:Sq9y  
Nominal Criterion   : 0.54403234 ac966<
#  
Test Wavelength     : 0.6328 ae
2SU4Jx  
)7Qp9Fxo  
C@-cLk  
Fields: XY Symmetric Angle in degrees :S!!J*0  
#      X-Field      Y-Field       Weight    VDX    VDY    VCX    VCY `0w!&  
1   0.000E+000   0.000E+000   1.000E+000  0.000  0.000  0.000  0.000 RyM29uD  
LfK/wSvWw  
Sensitivity Analysis: {i3=N{5b  
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                 |----------------- Minimum ----------------| |----------------- Maximum ----------------| `krVfE;_O  
Type                      Value      Criterion        Change          Value      Criterion        Change _F^NX%  
Fringe tolerance on surface 1 =}u?1~V  
TFRN   1            -1.00000000     0.54257256    -0.00145977     1.00000000     0.54548607     0.00145374
/[Rp~YzW  
Change in Focus                :      -0.000000                            0.000000 0;*[}M]Z  
Fringe tolerance on surface 2 Ox)_7A  
TFRN   2            -1.00000000     0.54177471    -0.00225762     1.00000000     0.54627463     0.00224230 =4&"fZ"v  
Change in Focus                :       0.000000                            0.000000 sqjDh  
Fringe tolerance on surface 3 g2rH"3sC  
TFRN   3            -1.00000000     0.54779866     0.00376632     1.00000000     0.54022572    -0.00380662 qLKL*m  
Change in Focus                :      -0.000000                            0.000000 w vI v+Q9  
Thickness tolerance on surface 1 P=9UK`n  
TTHI   1   3        -0.20000000     0.54321462    -0.00081772     0.20000000     0.54484759     0.00081525 YB^m!A),I[  
Change in Focus                :       0.000000                            0.000000 H7<g5pv  
Thickness tolerance on surface 2 A2\3.3  
TTHI   2   3        -0.20000000     0.54478712     0.00075478     0.20000000     0.54327558    -0.00075675 Y`6<:8[?  
Change in Focus                :       0.000000                           -0.000000 A_2lG!! 6  
Decenter X tolerance on surfaces 1 through 3 g0s4ZI+T  
TEDX   1   3        -0.20000000     0.54401464   -1.7700E-005     0.20000000     0.54401464   -1.7700E-005  p1&=D%/  
Change in Focus                :       0.000000                            0.000000 5Fq+^  
Decenter Y tolerance on surfaces 1 through 3 Mpk7$=hjc  
TEDY   1   3        -0.20000000     0.54401464   -1.7700E-005     0.20000000     0.54401464   -1.7700E-005 fZJM'+J@A  
Change in Focus                :       0.000000                            0.000000 $"}
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Tilt X tolerance on surfaces 1 through 3 (degrees) D4
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TETX   1   3        -0.20000000     0.54897548     0.00494314     0.20000000     0.54897548     0.00494314 AU
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Change in Focus                :       0.000000                            0.000000 4X}TG  
Tilt Y tolerance on surfaces 1 through 3 (degrees) 1-.i^Hal  
TETY   1   3        -0.20000000     0.54897548     0.00494314     0.20000000     0.54897548     0.00494314 l2wu>Ar7.  
Change in Focus                :       0.000000                            0.000000 3hzz*9/n  
Decenter X tolerance on surface 1 :`<MlX  
TSDX   1            -0.20000000     0.53999563    -0.00403671     0.20000000     0.53999563    -0.00403671 p!<PRms@  
Change in Focus                :       0.000000                            0.000000 <A`S
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Decenter Y tolerance on surface 1 <$#^)]Ts  
TSDY   1            -0.20000000     0.53999563    -0.00403671     0.20000000     0.53999563    -0.00403671 O
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Change in Focus                :       0.000000                            0.000000 rsw=a_S  
Tilt X tolerance on surface (degrees) 1 vNZ"x)?  
TSTX   1            -0.20000000     0.42678383    -0.11724851     0.20000000     0.42678383    -0.11724851 _6YfPk+  
Change in Focus                :       0.000000                            0.000000 y`/:E<fVk  
Tilt Y tolerance on surface (degrees) 1 {W%XSE  
TSTY   1            -0.20000000     0.42678383    -0.11724851     0.20000000     0.42678383    -0.11724851 ^?A>)?Sq  
Change in Focus                :       0.000000                            0.000000 t~qAA\p}o  
Decenter X tolerance on surface 2 V{\1qg{  
TSDX   2            -0.20000000     0.51705427    -0.02697807     0.20000000     0.51705427    -0.02697807 c`\qupnY  
Change in Focus                :       0.000000                            0.000000 mQ<Vwx0  
Decenter Y tolerance on surface 2 `}a-prT<f  
TSDY   2            -0.20000000     0.51705427    -0.02697807     0.20000000     0.51705427    -0.02697807 GW7+#  
Change in Focus                :       0.000000                            0.000000 )]\-Uy$x  
Tilt X tolerance on surface (degrees) 2 bhfKhXh8  
TSTX   2            -0.20000000     0.35349910    -0.19053324     0.20000000     0.35349910    -0.19053324 }We-sZ/w7r  
Change in Focus                :       0.000000                            0.000000 Q#&6J=}  
Tilt Y tolerance on surface (degrees) 2 3u s^\w#  
TSTY   2            -0.20000000     0.35349910    -0.19053324     0.20000000     0.35349910    -0.19053324 R[m+s=+  
Change in Focus                :       0.000000                            0.000000 Kv#Q$$)r  
Decenter X tolerance on surface 3 F+W{R+6  
TSDX   3            -0.20000000     0.53419039    -0.00984195     0.20000000     0.53419039    -0.00984195 >rYMOC~  
Change in Focus                :       0.000000                            0.000000 6\y?+H1  
Decenter Y tolerance on surface 3 xsvJjs;=  
TSDY   3            -0.20000000     0.53419039    -0.00984195     0.20000000     0.53419039    -0.00984195 A-M6MW  
Change in Focus                :       0.000000                            0.000000 @f,/K1
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Tilt X tolerance on surface (degrees) 3 ?]+!gz1  
TSTX   3            -0.20000000     0.42861670    -0.11541563     0.20000000     0.42861670    -0.11541563 5F]2.<i  
Change in Focus                :       0.000000                            0.000000 ]9wTAb  
Tilt Y tolerance on surface (degrees) 3 f>Tn#
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TSTY   3            -0.20000000     0.42861670    -0.11541563     0.20000000     0.42861670    -0.11541563 uNqN &7g  
Change in Focus                :       0.000000                            0.000000 ,WAJ& '^  
Irregularity of surface 1 in fringes 5UG"i_TC  
TIRR   1            -0.20000000     0.50973587    -0.03429647     0.20000000     0.57333868     0.02930634 &F'n >QT9q  
Change in Focus                :       0.000000                            0.000000 tU>7jo[-p  
Irregularity of surface 2 in fringes $2Bll5!]  
TIRR   2            -0.20000000     0.53400904    -0.01002330     0.20000000     0.55360281     0.00957047 'S9jMyZrZ  
Change in Focus                :       0.000000                            0.000000 fEGnI
\  
Irregularity of surface 3 in fringes lj+&3<E  
TIRR   3            -0.20000000     0.58078982     0.03675748     0.20000000     0.49904394    -0.04498840 H#T&7X_<  
Change in Focus                :       0.000000                            0.000000 N7)K\)DS!z  
Index tolerance on surface 1 $"6Gv  
TIND   1            -0.00100000     0.52606778    -0.01796456     0.00100000     0.56121811     0.01718578 H}8kku>7  
Change in Focus                :       0.000000                            0.000000 %P C[-(Q  
Index tolerance on surface 2 Pv*]AF;9pQ  
TIND   2            -0.00100000     0.55639086     0.01235852     0.00100000     0.53126361    -0.01276872 /7ykmW  
Change in Focus                :       0.000000                           -0.000000 fOP3`G^\  
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Worst offenders: B f.- 5  
Type                      Value      Criterion        Change 8RS@YO  
TSTY   2            -0.20000000     0.35349910    -0.19053324 /#?!9c  
TSTY   2             0.20000000     0.35349910    -0.19053324 Y+0GJuBf  
TSTX   2            -0.20000000     0.35349910    -0.19053324 Q0g^%  
TSTX   2             0.20000000     0.35349910    -0.19053324 CWb*bw0  
TSTY   1            -0.20000000     0.42678383    -0.11724851 KvO5-g  
TSTY   1             0.20000000     0.42678383    -0.11724851 J M;WCV%NM  
TSTX   1            -0.20000000     0.42678383    -0.11724851 d9l2mJzW  
TSTX   1             0.20000000     0.42678383    -0.11724851 tNYuuC%N  
TSTY   3            -0.20000000     0.42861670    -0.11541563 "cvhx/\1#  
TSTY   3             0.20000000     0.42861670    -0.11541563 z0&Y_Up+5  
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Estimated Performance Changes based upon Root-Sum-Square method: x((Rm_'  
Nominal MTF                 :     0.54403234 *0_Q0SeE,o  
Estimated change            :    -0.36299231  LYyud  
Estimated MTF               :     0.18104003 vLGnLpt  
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Compensator Statistics: CbOCL~ "  
Change in back focus: ~*e@^Nv)v  
Minimum            :        -0.000000 _KZTY`/*  
Maximum            :         0.000000 WM ]eb, 8q  
Mean               :        -0.000000 &#!1 Y[e^  
Standard Deviation :         0.000000 /?V-  
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Monte Carlo Analysis: v]
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Number of trials: 20 _s}`ohKvD  
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Initial Statistics: Normal Distribution :*YnH&  
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  Trial       Criterion        Change oFsV0 {x%)  
      1     0.42804416    -0.11598818 !%N@>[  
Change in Focus                :      -0.400171 :BB=E'293  
      2     0.54384387    -0.00018847 hUEA)c  
Change in Focus                :       1.018470 dq0!.gBT2  
      3     0.44510003    -0.09893230 $KP&#;9  
Change in Focus                :      -0.601922 )^ PWr^  
      4     0.18154684    -0.36248550 HumL(S'm  
Change in Focus                :       0.920681 d)d0,fi?-  
      5     0.28665820    -0.25737414 h-DHIk3/  
Change in Focus                :       1.253875 ,E"n7*6mr  
      6     0.21263372    -0.33139862 *JZlG%z  
Change in Focus                :      -0.903878 bHQ) :W  
      7     0.40051424    -0.14351809 Xv+,Z<>iQ  
Change in Focus                :      -1.354815 o4agaA3k  
      8     0.48754161    -0.05649072 \mWH8Z }Z  
Change in Focus                :       0.215922 Y8N+v+V/  
      9     0.40357468    -0.14045766 Of}C.N8  
Change in Focus                :       0.281783 rE0%R+4?  
     10     0.26315315    -0.28087919 m|v$F,Lv  
Change in Focus                :      -1.048393 5<P6PHdY  
     11     0.26120585    -0.28282649 ARG8\qU  
Change in Focus                :       1.017611 !lBK!'0  
     12     0.24033815    -0.30369419 [GcW*v  
Change in Focus                :      -0.109292 R\]C;@J<  
     13     0.37164046    -0.17239188 DVDzYR**4  
Change in Focus                :      -0.692430 |7${E^u  
     14     0.48597489    -0.05805744 x~K79Mya  
Change in Focus                :      -0.662040 o'8nQ Tao  
     15     0.21462327    -0.32940907 7xfS%'=y"  
Change in Focus                :       1.611296 D0>Pc9
 
     16     0.43378226    -0.11025008 B>@l(e)b  
Change in Focus                :      -0.640081  GInw7  
     17     0.39321881    -0.15081353 1MmEP  
Change in Focus                :       0.914906 *]nk{jo2  
     18     0.20692530    -0.33710703 9!.S9[[N  
Change in Focus                :       0.801607 ,H1K
sN  
     19     0.51374068    -0.03029165 k=&n>P  
Change in Focus                :       0.947293 whm|"}x)u  
     20     0.38013374    -0.16389860 fB]NEx|o~  
Change in Focus                :       0.667010 rK|("  
&(e5*Q  
Number of traceable Monte Carlo files generated: 20 CyXaHO  
h\Q@zR*0a  
Nominal     0.54403234 T6."j_  
Best        0.54384387    Trial     2
cIcu=U  
Worst       0.18154684    Trial     4 ^;tB,7:*V  
Mean        0.35770970 |dDKO  
Std Dev     0.11156454 2'-84  
%jHe_8=o  
GRaU]Z]ck  
Compensator Statistics: LF#[$ so{i  
Change in back focus: d8U<V<H<  
Minimum            :        -1.354815 5"X@<;H%  
Maximum            :         1.611296 h@o6=d=4  
Mean               :         0.161872 {'z$5<|  
Standard Deviation :         0.869664 7|GSs=  
)P
W|RW  
90% >       0.20977951               CxSh.$l  
80% >       0.22748071               A;dD'Kgl  
50% >       0.38667627               X4Pm&ol  
20% >       0.46553746               +L@\/=;G  
10% >       0.50064115                w'E?L`c  
'+3C2!  
End of Run. z^s\&gix  
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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 i"pOYZW1  

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 *aFY+.;U`  
=LGSywWM9  
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                 3D1y^I  
80% >       0.22748071                 I|qhj*_C  
50% >       0.38667627                 }/,Rp/+7]  
20% >       0.46553746                 VaGQre  
10% >       0.50064115 nc\2A>f`  
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最后这个数值是MTF值呢，还是MTF的公差？ 9I;~P &  
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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？？？   ~G-W|>  
TA2ETvz^  
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  : 3nc\6v%  
90% >       0.20977951                 K:$mEB[c<  
80% >       0.22748071                 oYTLC@98}  
50% >       0.38667627                 ".$kOH_:  
20% >       0.46553746                 /.CS6W^z  
10% >       0.50064115 ;nQ=! .#Q  
....... LjE3|+pJ  

1zH?.-  
1Q!^*D  
这些数值都是MTF值

Criterion           : Geometric MTF average S&T at 30.0000 cycles per mm   P-gjSE|yh  
Mode                : Sensitivities KB|mtsi  
Sampling            : 2  c1s&  
Nominal Criterion   : 0.54403234 2p\xgAW?  
Test Wavelength     : 0.6328 OObAn^bt  
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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？ d wG!]j>:_  
d/OP+yzgZ  
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