[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 o~~_>V)W  
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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 ^{bP#f  
 l[ L{m7  

图片:2.jpg

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然后运行分析的结果如下： "\BLi C  
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Analysis of Tolerances ZJx:?*0a  
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File : E:\光学设计资料\zemax练习\f500.ZMX ";GLX%C!{@  
Title: u!F3Rh8D  
Date : TUE JUN 21 2011 Pukq{/27  
*d%m.:)N  
Units are Millimeters. Fa;CWyt  
All changes are computed using linear differences. & MAIm56~  
s*S@}l  
Paraxial Focus compensation only. >si
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$1w8GI\J  
WARNING: Solves should be removed prior to tolerancing. KLoHjBq  
j\W+wnAgk  
Mnemonics: &)wQ|{P~k  
TFRN: Tolerance on curvature in fringes. fc M~4yP?  
TTHI: Tolerance on thickness. Sd{>(YWx~  
TSDX: Tolerance on surface decentering in x. 6#.R'O  
TSDY: Tolerance on surface decentering in y. > sUk6Z~  
TSTX: Tolerance on surface tilt in x (degrees). ,,i;6q_f  
TSTY: Tolerance on surface tilt in y (degrees). `]fY9ZDKs  
TIRR: Tolerance on irregularity (fringes). 0z,c6MjM+  
TIND: Tolerance on Nd index of refraction. lD{9o2  
TEDX: Tolerance on element decentering in x. k1]?d7g$w  
TEDY: Tolerance on element decentering in y. 44n^21k  
TETX: Tolerance on element tilt in x (degrees). HC$_p,9OV  
TETY: Tolerance on element tilt in y (degrees). H >RGX#|  
lfCoL@$6D  
WARNING: RAY AIMING IS OFF. Very loose tolerances may not be computed accurately. QK;A>]  
wD*_S}]  
WARNING: Boundary constraints on compensators will be ignored. `B^?Za,xN  
xOS4J+'s@  
Criterion           : Geometric MTF average S&T at 30.0000 cycles per mm T,;6q!s=  
Mode                : Sensitivities M T{^=F ]  
Sampling            : 2 >SccoI  
Nominal Criterion   : 0.54403234 Qs~;?BH&  
Test Wavelength     : 0.6328 hmks\eb~  
ZZ4W?);;  
Ha;^U/0|  
Fields: XY Symmetric Angle in degrees >bmL;)mc&  
#      X-Field      Y-Field       Weight    VDX    VDY    VCX    VCY bZ0r/f,n$  
1   0.000E+000   0.000E+000   1.000E+000  0.000  0.000  0.000  0.000 MF
=@PE][  
ZY{,//  
Sensitivity Analysis: n#m )]YQC  
`m3C\\9;  
                 |----------------- Minimum ----------------| |----------------- Maximum ----------------| |JrG?:n  
Type                      Value      Criterion        Change          Value      Criterion        Change lS}5bcjR=k  
Fringe tolerance on surface 1 u0N1+-6kr+  
TFRN   1            -1.00000000     0.54257256    -0.00145977     1.00000000     0.54548607     0.00145374 WM9QC59  
Change in Focus                :      -0.000000                            0.000000 Ll&Y_Ry  
Fringe tolerance on surface 2
lQ@2s[  
TFRN   2            -1.00000000     0.54177471    -0.00225762     1.00000000     0.54627463     0.00224230 uI+h9j$vS  
Change in Focus                :       0.000000                            0.000000 .\i
9}ye  
Fringe tolerance on surface 3 "bRck88V  
TFRN   3            -1.00000000     0.54779866     0.00376632     1.00000000     0.54022572    -0.00380662 )=8X[<^i  
Change in Focus                :      -0.000000                            0.000000 i9+V<'h  
Thickness tolerance on surface 1 84|Hn|4t  
TTHI   1   3        -0.20000000     0.54321462    -0.00081772     0.20000000     0.54484759     0.00081525 tR*J
M$T  
Change in Focus                :       0.000000                            0.000000 Rh~<#"G]  
Thickness tolerance on surface 2 1 aIJ0#nE  
TTHI   2   3        -0.20000000     0.54478712     0.00075478     0.20000000     0.54327558    -0.00075675 -<qci3Ba}  
Change in Focus                :       0.000000                           -0.000000 o^gqpQv  
Decenter X tolerance on surfaces 1 through 3 
1)M3*h3  
TEDX   1   3        -0.20000000     0.54401464   -1.7700E-005     0.20000000     0.54401464   -1.7700E-005 :h?Zg(l  
Change in Focus                :       0.000000                            0.000000 ,p0R4gi  
Decenter Y tolerance on surfaces 1 through 3 ck
-wMd  
TEDY   1   3        -0.20000000     0.54401464   -1.7700E-005     0.20000000     0.54401464   -1.7700E-005 lO)
p  
Change in Focus                :       0.000000                            0.000000 O+c@B}[!  
Tilt X tolerance on surfaces 1 through 3 (degrees) spgY &OI;  
TETX   1   3        -0.20000000     0.54897548     0.00494314     0.20000000     0.54897548     0.00494314 NNSn]LP  
Change in Focus                :       0.000000                            0.000000 ~[l2"@  
Tilt Y tolerance on surfaces 1 through 3 (degrees) / [:@j+n\  
TETY   1   3        -0.20000000     0.54897548     0.00494314     0.20000000     0.54897548     0.00494314 +d]}  
Change in Focus                :       0.000000                            0.000000 &yWl8O
 
Decenter X tolerance on surface 1 `[7&tOvSk  
TSDX   1            -0.20000000     0.53999563    -0.00403671     0.20000000     0.53999563    -0.00403671 w#]%I+  
Change in Focus                :       0.000000                            0.000000 |fq1Mn8  
Decenter Y tolerance on surface 1 fq_6xs  
TSDY   1            -0.20000000     0.53999563    -0.00403671     0.20000000     0.53999563    -0.00403671 s+^YGB  
Change in Focus                :       0.000000                            0.000000 hG; NJx-=R  
Tilt X tolerance on surface (degrees) 1 }kGJ)zh  
TSTX   1            -0.20000000     0.42678383    -0.11724851     0.20000000     0.42678383    -0.11724851 ^[lg1uMW  
Change in Focus                :       0.000000                            0.000000 61b,+'-  
Tilt Y tolerance on surface (degrees) 1 ME{i-E4  
TSTY   1            -0.20000000     0.42678383    -0.11724851     0.20000000     0.42678383    -0.11724851 pT:CvJ  
Change in Focus                :       0.000000                            0.000000 X 1^f0\k  
Decenter X tolerance on surface 2 i$$\}2m{L  
TSDX   2            -0.20000000     0.51705427    -0.02697807     0.20000000     0.51705427    -0.02697807 lzw3 x  
Change in Focus                :       0.000000                            0.000000 'GS1"rkW<5  
Decenter Y tolerance on surface 2 ^pAqe8u_  
TSDY   2            -0.20000000     0.51705427    -0.02697807     0.20000000     0.51705427    -0.02697807 j<4J_wE  
Change in Focus                :       0.000000                            0.000000 ct fKxGH  
Tilt X tolerance on surface (degrees) 2 SO3WOR`3  
TSTX   2            -0.20000000     0.35349910    -0.19053324     0.20000000     0.35349910    -0.19053324 vD^^0-Pk6  
Change in Focus                :       0.000000                            0.000000 WSKG8JT^|  
Tilt Y tolerance on surface (degrees) 2 ok2$ p  
TSTY   2            -0.20000000     0.35349910    -0.19053324     0.20000000     0.35349910    -0.19053324 DTsc&.29^  
Change in Focus                :       0.000000                            0.000000 ey@y?X=  
Decenter X tolerance on surface 3 t&eY+3y,T  
TSDX   3            -0.20000000     0.53419039    -0.00984195     0.20000000     0.53419039    -0.00984195 
No!P?  
Change in Focus                :       0.000000                            0.000000 a|  
Decenter Y tolerance on surface 3 }|&M@Up  
TSDY   3            -0.20000000     0.53419039    -0.00984195     0.20000000     0.53419039    -0.00984195 l&^9<th  
Change in Focus                :       0.000000                            0.000000 F;}?O==H;  
Tilt X tolerance on surface (degrees) 3 /%=p-By<V  
TSTX   3            -0.20000000     0.42861670    -0.11541563     0.20000000     0.42861670    -0.11541563 0q>f x  
Change in Focus                :       0.000000                            0.000000 k-Le)8+b  
Tilt Y tolerance on surface (degrees) 3 s=u0M;A0Q  
TSTY   3            -0.20000000     0.42861670    -0.11541563     0.20000000     0.42861670    -0.11541563 ^7vhize  
Change in Focus                :       0.000000                            0.000000 #c./<<P5}  
Irregularity of surface 1 in fringes -;
_NdL@  
TIRR   1            -0.20000000     0.50973587    -0.03429647     0.20000000     0.57333868     0.02930634 l3)
(aay!  
Change in Focus                :       0.000000                            0.000000 kT[]^Jtc  
Irregularity of surface 2 in fringes i=#r JK=  
TIRR   2            -0.20000000     0.53400904    -0.01002330     0.20000000     0.55360281     0.00957047 3q{
H=6  
Change in Focus                :       0.000000                            0.000000 (<=qW_iW  
Irregularity of surface 3 in fringes !s9<%bp3  
TIRR   3            -0.20000000     0.58078982     0.03675748     0.20000000     0.49904394    -0.04498840 QaUh+k<6  
Change in Focus                :       0.000000                            0.000000 LdDkd(k  
Index tolerance on surface 1 'h([Y8p{  
TIND   1            -0.00100000     0.52606778    -0.01796456     0.00100000     0.56121811     0.01718578 p$0;~1vH  
Change in Focus                :       0.000000                            0.000000 M%1-fd  
Index tolerance on surface 2 rX{QgyY&  
TIND   2            -0.00100000     0.55639086     0.01235852     0.00100000     0.53126361    -0.01276872 T<mk98CdE  
Change in Focus                :       0.000000                           -0.000000 mv)M9c,`  
RT F9;]Ti  
Worst offenders: mAX]m1s  
Type                      Value      Criterion        Change #B&D  
TSTY   2            -0.20000000     0.35349910    -0.19053324 7Z93`A-=  
TSTY   2             0.20000000     0.35349910    -0.19053324 JU1U=Lu."  
TSTX   2            -0.20000000     0.35349910    -0.19053324 ;yx+BaG~?  
TSTX   2             0.20000000     0.35349910    -0.19053324 )jn|+M  
TSTY   1            -0.20000000     0.42678383    -0.11724851 l)Q,*i  
TSTY   1             0.20000000     0.42678383    -0.11724851 8n,i5>!d  
TSTX   1            -0.20000000     0.42678383    -0.11724851 cs8bRXjHa  
TSTX   1             0.20000000     0.42678383    -0.11724851 t9zPJQlT}  
TSTY   3            -0.20000000     0.42861670    -0.11541563 VQ$=F8ivG  
TSTY   3             0.20000000     0.42861670    -0.11541563 7'xT)~*$4  
<YUc?NF  
Estimated Performance Changes based upon Root-Sum-Square method: _2<|0lvh  
Nominal MTF                 :     0.54403234 iePpJ>(  
Estimated change            :    -0.36299231 F C2oP,  
Estimated MTF               :     0.18104003 LyS139P$  
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Compensator Statistics: 44 o5I:  
Change in back focus: ;_F iiBk7(  
Minimum            :        -0.000000 R5H UgI  
Maximum            :         0.000000 K
QNSYI7a  
Mean               :        -0.000000 vpMNulXb,  
Standard Deviation :         0.000000 (t&P.N/  
.[+8D
=  
Monte Carlo Analysis: >6@*%LM  
Number of trials: 20 CDO_A\  
>hRYsWbmg  
Initial Statistics: Normal Distribution uY5f mM9  
VVYQIR]!yk  
  Trial       Criterion        Change SrN0f0  
      1     0.42804416    -0.11598818 13}=;4O  
Change in Focus                :      -0.400171 3r%I *  
      2     0.54384387    -0.00018847 'N,x=1R5  
Change in Focus                :       1.018470 \
I/l6H>o3  
      3     0.44510003    -0.09893230 Rqa#;wb!(  
Change in Focus                :      -0.601922 C.C\(2- Rr  
      4     0.18154684    -0.36248550 '4L i  
Change in Focus                :       0.920681 +`mJ
h\*  
      5     0.28665820    -0.25737414 R =mawmQ2  
Change in Focus                :       1.253875 c_kxjzA#  
      6     0.21263372    -0.33139862 Y=vA;BE]R  
Change in Focus                :      -0.903878 Z@t).$  
      7     0.40051424    -0.14351809 s><RL]+{G+  
Change in Focus                :      -1.354815 >M[rOu (d  
      8     0.48754161    -0.05649072 "sUe:F;  
Change in Focus                :       0.215922 )d>"K`3  
      9     0.40357468    -0.14045766 A:cc @ku  
Change in Focus                :       0.281783 ]Q6,,/nn  
     10     0.26315315    -0.28087919 JLT':e~PX  
Change in Focus                :      -1.048393 w44{~[0d4  
     11     0.26120585    -0.28282649 qdAz3iye  
Change in Focus                :       1.017611 KG4~t=J`  
     12     0.24033815    -0.30369419 aS'G&(_  
Change in Focus                :      -0.109292 vJtQ&,zG  
     13     0.37164046    -0.17239188 Nr|.]=K)5n  
Change in Focus                :      -0.692430 shYcfLJ  
     14     0.48597489    -0.05805744 G"O%u|7  
Change in Focus                :      -0.662040 &.K8cphj  
     15     0.21462327    -0.32940907 {SqY77  
Change in Focus                :       1.611296 Lyt6DvAp"  
     16     0.43378226    -0.11025008 ,
HUs MCXQ  
Change in Focus                :      -0.640081 S]K^wj[  
     17     0.39321881    -0.15081353 B5=L</Aj  
Change in Focus                :       0.914906 |b'tf:l  
     18     0.20692530    -0.33710703 O>n L;I  
Change in Focus                :       0.801607 ]^8:"Ky'  
     19     0.51374068    -0.03029165 4w*F!E2H\}  
Change in Focus                :       0.947293 E{wV
f_K  
     20     0.38013374    -0.16389860 L((z;y>q|  
Change in Focus                :       0.667010 !CPv{c`|qg  
!D7\$ g6g  
Number of traceable Monte Carlo files generated: 20 (J\D"4q  
l1
gAm#  
Nominal     0.54403234 O<L/m[]  
Best        0.54384387    Trial     2 TG{=~2  
Worst       0.18154684    Trial     4 6Ck?O/^  
Mean        0.35770970 t=xO12Z  
Std Dev     0.11156454 NO`LSF  
u32wS$*8  
dm8veKW'l  
Compensator Statistics: L6r&Y~+/  
Change in back focus: 87YT;Z;U&  
Minimum            :        -1.354815 ENA8o}n  
Maximum            :         1.611296 Q\m"n^XN  
Mean               :         0.161872 ` *$^rQS  
Standard Deviation :         0.869664 &{Uaa  
Y
0&w;P  
90% >       0.20977951               Q]{DhDz?+  
80% >       0.22748071               RNl%n}  
50% >       0.38667627               }b)?o@9}:  
20% >       0.46553746               S8.nM}x  
10% >       0.50064115                ,(OA5%A9zK  
YRW<n9=3  
End of Run. @#*B|lHE  
B?#@<2*=L
 
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 S4~^HvMG[Y  

图片:3.JPG

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ln3x1^!  
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 a[lE9JA;|  
z<: 9,wtbP  
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                 xCoQ>.4p  
80% >       0.22748071                 9FcCq*D  
50% >       0.38667627                 R%7k<1d'`  
20% >       0.46553746                 !. q*bY  
10% >       0.50064115 R^%7|  
Bk?MF6  
最后这个数值是MTF值呢，还是MTF的公差？ OM}:1He  
PuUqWW'^  
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？？？   UL"JwqD  
}6^(  
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  : s+Ln>c'|o  
90% >       0.20977951                 ?ew^%1!W.  
80% >       0.22748071                 /Hx%gKU  
50% >       0.38667627                 dtm_~r7~  
20% >       0.46553746                 M(?|$$   
10% >       0.50064115 /c__{?go  
....... 6mMJ$FY+  

`=%[  
*C's7O{O  
这些数值都是MTF值

Criterion           : Geometric MTF average S&T at 30.0000 cycles per mm   +S0A`rL  
Mode                : Sensitivities k=nfo-h  
Sampling            : 2 dpJi5fN  
Nominal Criterion   : 0.54403234 q)<5&|V  
Test Wavelength     : 0.6328 |FPx8b;#  
3=sA]j-+(  
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？ [h8F)
  
z-$?.?d  
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