[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 | W?[,|e  
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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 %9YA^ri  
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图片:2.jpg

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然后运行分析的结果如下： #J3zTG(:@  
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Analysis of Tolerances PE7t_iSV  
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File : E:\光学设计资料\zemax练习\f500.ZMX I,z"_[^G  
Title: (T2<!&0 @  
Date : TUE JUN 21 2011 xx}'l:}2]  
0, "ZV}  
Units are Millimeters. jM;d>Gymx  
All changes are computed using linear differences. OMxxI6h  
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Paraxial Focus compensation only. $WM8tF?H  
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WARNING: Solves should be removed prior to tolerancing. {!tOI  
'U*udkn 2]  
Mnemonics: fIlIH  
TFRN: Tolerance on curvature in fringes. wtUG^hV #_  
TTHI: Tolerance on thickness. KD9Ca $-  
TSDX: Tolerance on surface decentering in x. `O jvt-5}E  
TSDY: Tolerance on surface decentering in y. I$F\(]"@  
TSTX: Tolerance on surface tilt in x (degrees). 9cbB[c_.  
TSTY: Tolerance on surface tilt in y (degrees). }K+\8em  
TIRR: Tolerance on irregularity (fringes). tl2Lq0  
TIND: Tolerance on Nd index of refraction. vkh;qPD  
TEDX: Tolerance on element decentering in x. L7[X|zmy*x  
TEDY: Tolerance on element decentering in y.  6.vNe  
TETX: Tolerance on element tilt in x (degrees). 5M]6'X6I  
TETY: Tolerance on element tilt in y (degrees). Q9nu"x %  
q w"e0q%)  
WARNING: RAY AIMING IS OFF. Very loose tolerances may not be computed accurately. "%Lmgy:~  
:hi$}xHa  
WARNING: Boundary constraints on compensators will be ignored. ud
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Criterion           : Geometric MTF average S&T at 30.0000 cycles per mm 79y'Ja+`j  
Mode                : Sensitivities AZ}%MA;q  
Sampling            : 2 rjt O`Mt`  
Nominal Criterion   : 0.54403234 6pSRum  
Test Wavelength     : 0.6328 ~91uk3ST?  
,\Z8*Jr3Q  
UYlJO{|a  
Fields: XY Symmetric Angle in degrees _6| /P7"  
#      X-Field      Y-Field       Weight    VDX    VDY    VCX    VCY 9eksCxFg  
1   0.000E+000   0.000E+000   1.000E+000  0.000  0.000  0.000  0.000 ?T~3B]R  
]eORw$f  
Sensitivity Analysis: \"{/yjO|4  
!Q\X)C  
                 |----------------- Minimum ----------------| |----------------- Maximum ----------------| 1Q3%!~<\s  
Type                      Value      Criterion        Change          Value      Criterion        Change _dz:\v  
Fringe tolerance on surface 1 dVK@Fgo  
TFRN   1            -1.00000000     0.54257256    -0.00145977     1.00000000     0.54548607     0.00145374 2I9{
+>k  
Change in Focus                :      -0.000000                            0.000000 -{.h\  
Fringe tolerance on surface 2 V:$[~)k8  
TFRN   2            -1.00000000     0.54177471    -0.00225762     1.00000000     0.54627463     0.00224230 a^(S!I  
Change in Focus                :       0.000000                            0.000000 b'i%B9yU:%  
Fringe tolerance on surface 3 #IcT @(  
TFRN   3            -1.00000000     0.54779866     0.00376632     1.00000000     0.54022572    -0.00380662 {5?!`<fF  
Change in Focus                :      -0.000000                            0.000000 c|8KT  
Thickness tolerance on surface 1 L+`}euu5  
TTHI   1   3        -0.20000000     0.54321462    -0.00081772     0.20000000     0.54484759     0.00081525
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Change in Focus                :       0.000000                            0.000000 Y>c5:F;  
Thickness tolerance on surface 2 PLlx~A  
TTHI   2   3        -0.20000000     0.54478712     0.00075478     0.20000000     0.54327558    -0.00075675 GhaAvyN  
Change in Focus                :       0.000000                           -0.000000 C&qDvvk  
Decenter X tolerance on surfaces 1 through 3 X*D5y8<  
TEDX   1   3        -0.20000000     0.54401464   -1.7700E-005     0.20000000     0.54401464   -1.7700E-005 ~6pCO
S}  
Change in Focus                :       0.000000                            0.000000 9;'>\ImI  
Decenter Y tolerance on surfaces 1 through 3 #0#V$AA>  
TEDY   1   3        -0.20000000     0.54401464   -1.7700E-005     0.20000000     0.54401464   -1.7700E-005 aa'0EU:  
Change in Focus                :       0.000000                            0.000000 !dYX2!lvT  
Tilt X tolerance on surfaces 1 through 3 (degrees) ]*t*/j;N  
TETX   1   3        -0.20000000     0.54897548     0.00494314     0.20000000     0.54897548     0.00494314 u:p:*u_^I  
Change in Focus                :       0.000000                            0.000000 ,(5dQ`hA0  
Tilt Y tolerance on surfaces 1 through 3 (degrees) 70I4-[/z[d  
TETY   1   3        -0.20000000     0.54897548     0.00494314     0.20000000     0.54897548     0.00494314 M<hs_8_*  
Change in Focus                :       0.000000                            0.000000 w96j,rEC  
Decenter X tolerance on surface 1 -bIpmp?  
TSDX   1            -0.20000000     0.53999563    -0.00403671     0.20000000     0.53999563    -0.00403671 RJ7/I/yD|  
Change in Focus                :       0.000000                            0.000000 cviN$oL  
Decenter Y tolerance on surface 1 9^=t@  
TSDY   1            -0.20000000     0.53999563    -0.00403671     0.20000000     0.53999563    -0.00403671 FeincZ!M  
Change in Focus                :       0.000000                            0.000000 8O}A/*1FJ  
Tilt X tolerance on surface (degrees) 1 '3Y0D1`v  
TSTX   1            -0.20000000     0.42678383    -0.11724851     0.20000000     0.42678383    -0.11724851 J/H#d')c  
Change in Focus                :       0.000000                            0.000000 '8((;N|I^  
Tilt Y tolerance on surface (degrees) 1 8M5!5Jzv  
TSTY   1            -0.20000000     0.42678383    -0.11724851     0.20000000     0.42678383    -0.11724851 ()rx>?x5  
Change in Focus                :       0.000000                            0.000000 #z1ch,*3;  
Decenter X tolerance on surface 2 *U5>j#,  
TSDX   2            -0.20000000     0.51705427    -0.02697807     0.20000000     0.51705427    -0.02697807 M2;(+8 b  
Change in Focus                :       0.000000                            0.000000 x Jj8njuq4  
Decenter Y tolerance on surface 2 <yb=!  
TSDY   2            -0.20000000     0.51705427    -0.02697807     0.20000000     0.51705427    -0.02697807 EUYa =-  
Change in Focus                :       0.000000                            0.000000 D[FfJcV'$  
Tilt X tolerance on surface (degrees) 2 cnjj) c  
TSTX   2            -0.20000000     0.35349910    -0.19053324     0.20000000     0.35349910    -0.19053324 [M zc^I&  
Change in Focus                :       0.000000                            0.000000 b{ubp  
Tilt Y tolerance on surface (degrees) 2 8Y;zs7Y  
TSTY   2            -0.20000000     0.35349910    -0.19053324     0.20000000     0.35349910    -0.19053324 { ?1mY"  
Change in Focus                :       0.000000                            0.000000 S]e~)IgO  
Decenter X tolerance on surface 3 2*UE&Gp  
TSDX   3            -0.20000000     0.53419039    -0.00984195     0.20000000     0.53419039    -0.00984195 *X=f  
Change in Focus                :       0.000000                            0.000000 S'H0nJ3  
Decenter Y tolerance on surface 3 xaq=?3QOH  
TSDY   3            -0.20000000     0.53419039    -0.00984195     0.20000000     0.53419039    -0.00984195 `U?H^,FVA  
Change in Focus                :       0.000000                            0.000000 5)o-]S>  
Tilt X tolerance on surface (degrees) 3 3K;b~xg`nw  
TSTX   3            -0.20000000     0.42861670    -0.11541563     0.20000000     0.42861670    -0.11541563 *j|Tm7C  
Change in Focus                :       0.000000                            0.000000 `Mh<S+/  
Tilt Y tolerance on surface (degrees) 3 hU)f(L  
TSTY   3            -0.20000000     0.42861670    -0.11541563     0.20000000     0.42861670    -0.11541563 ;V}FbWz^v6  
Change in Focus                :       0.000000                            0.000000 Ar{=gENn  
Irregularity of surface 1 in fringes 86) 3XE[5  
TIRR   1            -0.20000000     0.50973587    -0.03429647     0.20000000     0.57333868     0.02930634 Ot:\h  
Change in Focus                :       0.000000                            0.000000 =B 4gEWR  
Irregularity of surface 2 in fringes 8aIf{(/k  
TIRR   2            -0.20000000     0.53400904    -0.01002330     0.20000000     0.55360281     0.00957047 QW"6]  
Change in Focus                :       0.000000                            0.000000 K5c7>I%k  
Irregularity of surface 3 in fringes 
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TIRR   3            -0.20000000     0.58078982     0.03675748     0.20000000     0.49904394    -0.04498840 F|ML$  
Change in Focus                :       0.000000                            0.000000 C?c-V,  
Index tolerance on surface 1 9j>sRE1  
TIND   1            -0.00100000     0.52606778    -0.01796456     0.00100000     0.56121811     0.01718578 m^s2kB4A[  
Change in Focus                :       0.000000                            0.000000 g>oYEFFJ  
Index tolerance on surface 2 =)UiI3xHk  
TIND   2            -0.00100000     0.55639086     0.01235852     0.00100000     0.53126361    -0.01276872  ,IvnNnl2  
Change in Focus                :       0.000000                           -0.000000 oG_'<5Bv>  
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Worst offenders: !JQ~r@j  
Type                      Value      Criterion        Change LB ^^e"  
TSTY   2            -0.20000000     0.35349910    -0.19053324 !Z2n;.w  
TSTY   2             0.20000000     0.35349910    -0.19053324 9P>S[=  
TSTX   2            -0.20000000     0.35349910    -0.19053324 QNI|h;D  
TSTX   2             0.20000000     0.35349910    -0.19053324 z# ?w/NE  
TSTY   1            -0.20000000     0.42678383    -0.11724851 >w
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TSTY   1             0.20000000     0.42678383    -0.11724851 }Knq9cf  
TSTX   1            -0.20000000     0.42678383    -0.11724851 jW0z|jr  
TSTX   1             0.20000000     0.42678383    -0.11724851 ->25$5#  
TSTY   3            -0.20000000     0.42861670    -0.11541563 3g "xm  
TSTY   3             0.20000000     0.42861670    -0.11541563 5pyvs;As  
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Estimated Performance Changes based upon Root-Sum-Square method: >-o:> 5  
Nominal MTF                 :     0.54403234 `1v!sSR0R  
Estimated change            :    -0.36299231 I; }%k;v6  
Estimated MTF               :     0.18104003 d/zX
%  
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Compensator Statistics: 64j 4P 7  
Change in back focus: C>;8`6_!gU  
Minimum            :        -0.000000 iiDkk  
Maximum            :         0.000000 PC7.+;1  
Mean               :        -0.000000 kb\v}gfiD/  
Standard Deviation :         0.000000 q9(}wvtr  
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Monte Carlo Analysis: Ln%_8yth  
Number of trials: 20 '>3RZ&O  
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Initial Statistics: Normal Distribution S_;:iC]B  
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  Trial       Criterion        Change $^aXVy5p  
      1     0.42804416    -0.11598818 rBPxGBd4  
Change in Focus                :      -0.400171 0P/LW|16  
      2     0.54384387    -0.00018847 Y9ce"*b  
Change in Focus                :       1.018470 qNVw+U;2P  
      3     0.44510003    -0.09893230 WbzL!zLd!  
Change in Focus                :      -0.601922 ,#;ahwU~s  
      4     0.18154684    -0.36248550 LVtQ^ 5>8  
Change in Focus                :       0.920681 Sf:lN4  
      5     0.28665820    -0.25737414 _1%^ibn  
Change in Focus                :       1.253875 =YsT
F T  
      6     0.21263372    -0.33139862 d~$t{46  
Change in Focus                :      -0.903878 hs uJ;4}$q  
      7     0.40051424    -0.14351809 VQ3&  
Change in Focus                :      -1.354815 | N,nt@~  
      8     0.48754161    -0.05649072 L6#d  
Change in Focus                :       0.215922 sjkl? _  
      9     0.40357468    -0.14045766 P[oB'  
Change in Focus                :       0.281783 3A1kH` X^q  
     10     0.26315315    -0.28087919 Bq8<FZr#!  
Change in Focus                :      -1.048393 iW$i%`>  
     11     0.26120585    -0.28282649 ^Wz{su2  
Change in Focus                :       1.017611 %6:2cR  
     12     0.24033815    -0.30369419 V$D d 7  
Change in Focus                :      -0.109292 O]!DNN  
     13     0.37164046    -0.17239188 5X-{|r3q  
Change in Focus                :      -0.692430 u)MA#p {  
     14     0.48597489    -0.05805744 Jev.o]|_,  
Change in Focus                :      -0.662040 t\0JNi$2  
     15     0.21462327    -0.32940907 U]3JCZ{]0E  
Change in Focus                :       1.611296 1S#bV} !  
     16     0.43378226    -0.11025008 5Ozj&Zq  
Change in Focus                :      -0.640081 B ~GyS"  
     17     0.39321881    -0.15081353 %.Y`X(g6/  
Change in Focus                :       0.914906 j* ?MFvwE  
     18     0.20692530    -0.33710703 KJSy7F  
Change in Focus                :       0.801607 7w({ GZ  
     19     0.51374068    -0.03029165 gI{F"7fa=  
Change in Focus                :       0.947293 *E6 p=  
     20     0.38013374    -0.16389860 x7>sy,c  
Change in Focus                :       0.667010 ArMe[t0$  
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Number of traceable Monte Carlo files generated: 20 4TV9t"Dk+c  
-fn~y1  
Nominal     0.54403234 Iqv 5lo .  
Best        0.54384387    Trial     2 |Dli6K
N  
Worst       0.18154684    Trial     4 9r}}
m0  
Mean        0.35770970 K~G^jAk+  
Std Dev     0.11156454 ~C+T|  
,)8Hl[y  
;kA2"c]m  
Compensator Statistics: v\u+=}rl  
Change in back focus: 4Qs#ws])  
Minimum            :        -1.354815 d4tVK0 ~  
Maximum            :         1.611296 WOoVVjMM  
Mean               :         0.161872 <#i'3TUR  
Standard Deviation :         0.869664 vzPrG%Uu7g  
%/p5C  
90% >       0.20977951               W'yICt(#G  
80% >       0.22748071               ZN/")  
50% >       0.38667627               BZsxf'eN'  
20% >       0.46553746               6zSN?0c  
10% >       0.50064115                \WEC1+@  
NKN!X/P  
End of Run. 14O/R3+  
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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 |/Z4lcI  

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 &3MHe$  
j\<S6%p#R  
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                 BFY~::<b  
80% >       0.22748071                 /W;;7k  
50% >       0.38667627                 F+X3CB,f  
20% >       0.46553746                 6%? NNEM  
10% >       0.50064115 Zn/1uWO  
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最后这个数值是MTF值呢，还是MTF的公差？ =1D*K%  
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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？？？   8w$cj'  
q /#O :Q  
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  : IUzRE?Kzf
 
90% >       0.20977951                 `OduBUI]]  
80% >       0.22748071                 i`
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50% >       0.38667627                 9~a_^m/  
20% >       0.46553746                 5^pQ=Sgt  
10% >       0.50064115 d8|:)7PSt  
....... Oyz=|[^,W  

csYICLj  
_oR6^#5#  
这些数值都是MTF值

Criterion           : Geometric MTF average S&T at 30.0000 cycles per mm    c,x2  
Mode                : Sensitivities u{8Wu;  
Sampling            : 2 3&_(D)+  
Nominal Criterion   : 0.54403234 nLYyS#  
Test Wavelength     : 0.6328 B,}%1+*  
'v4AM@%u  
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？ Xig%Q~oMp  
}?"f#bI  
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