[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 z"@yE*6  
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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 eXqS9`zKr  
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图片:2.jpg

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然后运行分析的结果如下： EN =oA P  
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Analysis of Tolerances &GC`4!H  
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File : E:\光学设计资料\zemax练习\f500.ZMX &F*L=Ng  
Title: Sj$XRkbj:  
Date : TUE JUN 21 2011 8d90B9  
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Units are Millimeters. wap@q6fz<  
All changes are computed using linear differences. /"Bm1  
B|~tW21  
Paraxial Focus compensation only. B4yC"55  
YMidSfi  
WARNING: Solves should be removed prior to tolerancing. =-r[ s%t&  
'n9<z)/,!  
Mnemonics: )Bl0 W  
TFRN: Tolerance on curvature in fringes. GtCbzNY  
TTHI: Tolerance on thickness. YR2Q6}xR  
TSDX: Tolerance on surface decentering in x. [q/tKdo@  
TSDY: Tolerance on surface decentering in y. 0<8pG:BQ  
TSTX: Tolerance on surface tilt in x (degrees). Vd-\_VP20  
TSTY: Tolerance on surface tilt in y (degrees). B}%B4&Ij  
TIRR: Tolerance on irregularity (fringes). [84f[`!Ui  
TIND: Tolerance on Nd index of refraction. vakAl;  
TEDX: Tolerance on element decentering in x. ]pZxbs&Vb  
TEDY: Tolerance on element decentering in y. :3z`+5Y*  
TETX: Tolerance on element tilt in x (degrees). 1kG{z;9  
TETY: Tolerance on element tilt in y (degrees). 0'giAA  
cH&-/|N  
WARNING: RAY AIMING IS OFF. Very loose tolerances may not be computed accurately. G\y:O9
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(QPfrR=J4  
WARNING: Boundary constraints on compensators will be ignored. t(O{IUYM  
*nv%~t   
Criterion           : Geometric MTF average S&T at 30.0000 cycles per mm dPdodjSu,!  
Mode                : Sensitivities s)=fs#%  
Sampling            : 2 I.f)rMl+h  
Nominal Criterion   : 0.54403234 1^*M*>&d<  
Test Wavelength     : 0.6328 ;^9Ao>(?y  
lzQmD/i*  
BI'}  
Fields: XY Symmetric Angle in degrees mG?g  
#      X-Field      Y-Field       Weight    VDX    VDY    VCX    VCY 7r`A6 \
!  
1   0.000E+000   0.000E+000   1.000E+000  0.000  0.000  0.000  0.000 U;Iqz1S  
+bG^SH2ke  
Sensitivity Analysis: Q-3o k7
 

tSr.0'CE  
                 |----------------- Minimum ----------------| |----------------- Maximum ----------------| 6;02_C]\o  
Type                      Value      Criterion        Change          Value      Criterion        Change 2;Ij~~  
Fringe tolerance on surface 1 Svs!C+:le  
TFRN   1            -1.00000000     0.54257256    -0.00145977     1.00000000     0.54548607     0.00145374 :u%Jrc(W  
Change in Focus                :      -0.000000                            0.000000 "ooq1 0P  
Fringe tolerance on surface 2 ^ |k7g  
TFRN   2            -1.00000000     0.54177471    -0.00225762     1.00000000     0.54627463     0.00224230 IXm}WTgF!  
Change in Focus                :       0.000000                            0.000000 PdUlwT?8C  
Fringe tolerance on surface 3 EJM6TI"  
TFRN   3            -1.00000000     0.54779866     0.00376632     1.00000000     0.54022572    -0.00380662 5
B&#Sh`r  
Change in Focus                :      -0.000000                            0.000000 Zc_%hQf2A  
Thickness tolerance on surface 1 5'JONw'\  
TTHI   1   3        -0.20000000     0.54321462    -0.00081772     0.20000000     0.54484759     0.00081525 )ZU)$dJ>V  
Change in Focus                :       0.000000                            0.000000 v99gI%TA'  
Thickness tolerance on surface 2 aZ[ aZU  
TTHI   2   3        -0.20000000     0.54478712     0.00075478     0.20000000     0.54327558    -0.00075675 N$8do?  
Change in Focus                :       0.000000                           -0.000000 uSeRn@  
Decenter X tolerance on surfaces 1 through 3 SLzxFuV  
TEDX   1   3        -0.20000000     0.54401464   -1.7700E-005     0.20000000     0.54401464   -1.7700E-005 j.? '*?P  
Change in Focus                :       0.000000                            0.000000 (;f7/2~`  
Decenter Y tolerance on surfaces 1 through 3 ?;s}GpEY:  
TEDY   1   3        -0.20000000     0.54401464   -1.7700E-005     0.20000000     0.54401464   -1.7700E-005 K%Dksx7ow  
Change in Focus                :       0.000000                            0.000000 wT;3>%Mtr  
Tilt X tolerance on surfaces 1 through 3 (degrees) N7S?m@  
TETX   1   3        -0.20000000     0.54897548     0.00494314     0.20000000     0.54897548     0.00494314 X@;o<2^  
Change in Focus                :       0.000000                            0.000000 ,G";ny[$  
Tilt Y tolerance on surfaces 1 through 3 (degrees) cs'ylGH  
TETY   1   3        -0.20000000     0.54897548     0.00494314     0.20000000     0.54897548     0.00494314 ' }G!D  
Change in Focus                :       0.000000                            0.000000 "pP
5;*^f  
Decenter X tolerance on surface 1 NQ7j{dJ?  
TSDX   1            -0.20000000     0.53999563    -0.00403671     0.20000000     0.53999563    -0.00403671 aR3R,6ec  
Change in Focus                :       0.000000                            0.000000 dKs^Dq  
Decenter Y tolerance on surface 1 -Wp69DP6q  
TSDY   1            -0.20000000     0.53999563    -0.00403671     0.20000000     0.53999563    -0.00403671 6`/nA4S4.  
Change in Focus                :       0.000000                            0.000000 *h+@a  
Tilt X tolerance on surface (degrees) 1 qH3<,s*  
TSTX   1            -0.20000000     0.42678383    -0.11724851     0.20000000     0.42678383    -0.11724851 'z'q)vcr  
Change in Focus                :       0.000000                            0.000000 I%.96V  
Tilt Y tolerance on surface (degrees) 1 e(;1XqLM  
TSTY   1            -0.20000000     0.42678383    -0.11724851     0.20000000     0.42678383    -0.11724851 h/I'9&J>*  
Change in Focus                :       0.000000                            0.000000 c6IFt4)g  
Decenter X tolerance on surface 2 D}n&`^1X+  
TSDX   2            -0.20000000     0.51705427    -0.02697807     0.20000000     0.51705427    -0.02697807 K+3dwQo  
Change in Focus                :       0.000000                            0.000000 @x9DV{j)V  
Decenter Y tolerance on surface 2 N|Cx";,|FZ  
TSDY   2            -0.20000000     0.51705427    -0.02697807     0.20000000     0.51705427    -0.02697807 Kk5 vC{  
Change in Focus                :       0.000000                            0.000000 W<J".2D  
Tilt X tolerance on surface (degrees) 2 W/z\j/Rgc  
TSTX   2            -0.20000000     0.35349910    -0.19053324     0.20000000     0.35349910    -0.19053324 *?;<buJb?  
Change in Focus                :       0.000000                            0.000000 Ix+===6  
Tilt Y tolerance on surface (degrees) 2 RYU(z;+0p  
TSTY   2            -0.20000000     0.35349910    -0.19053324     0.20000000     0.35349910    -0.19053324 ~Wh}W((L  
Change in Focus                :       0.000000                            0.000000 eY3l^Su1  
Decenter X tolerance on surface 3 HPc7Vo(  
TSDX   3            -0.20000000     0.53419039    -0.00984195     0.20000000     0.53419039    -0.00984195 R|7yhsJq,  
Change in Focus                :       0.000000                            0.000000 HK@LA3  
Decenter Y tolerance on surface 3 a&>Tk%  
TSDY   3            -0.20000000     0.53419039    -0.00984195     0.20000000     0.53419039    -0.00984195 h'{}eYb+   
Change in Focus                :       0.000000                            0.000000 5F@7A2ZR  
Tilt X tolerance on surface (degrees) 3 9fk@C/$  
TSTX   3            -0.20000000     0.42861670    -0.11541563     0.20000000     0.42861670    -0.11541563 JNQiCK,)}M  
Change in Focus                :       0.000000                            0.000000 5k0r{^#M  
Tilt Y tolerance on surface (degrees) 3 czMu<@c [  
TSTY   3            -0.20000000     0.42861670    -0.11541563     0.20000000     0.42861670    -0.11541563 #+mt}w/  
Change in Focus                :       0.000000                            0.000000 6p
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Irregularity of surface 1 in fringes U) tqo_  
TIRR   1            -0.20000000     0.50973587    -0.03429647     0.20000000     0.57333868     0.02930634 fz%I'
+!  
Change in Focus                :       0.000000                            0.000000 adHZX  
Irregularity of surface 2 in fringes {`Ekv/XWa  
TIRR   2            -0.20000000     0.53400904    -0.01002330     0.20000000     0.55360281     0.00957047 QPe+K61U  
Change in Focus                :       0.000000                            0.000000 >Ab>"!/'K  
Irregularity of surface 3 in fringes  Vf:w.G A  
TIRR   3            -0.20000000     0.58078982     0.03675748     0.20000000     0.49904394    -0.04498840 JCjQR`)  
Change in Focus                :       0.000000                            0.000000 4::>C
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Index tolerance on surface 1 A>;Q<8rh  
TIND   1            -0.00100000     0.52606778    -0.01796456     0.00100000     0.56121811     0.01718578 ,|gX?[o  
Change in Focus                :       0.000000                            0.000000 F_8nxQ-  
Index tolerance on surface 2 EJ
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TIND   2            -0.00100000     0.55639086     0.01235852     0.00100000     0.53126361    -0.01276872 ;^5d^-T  
Change in Focus                :       0.000000                           -0.000000 ISHNeO8  
hkzyI~7  
Worst offenders: @(XX68  
Type                      Value      Criterion        Change +y!B`'J  
TSTY   2            -0.20000000     0.35349910    -0.19053324 g8 (zvG;Y  
TSTY   2             0.20000000     0.35349910    -0.19053324 &3x \wH/_  
TSTX   2            -0.20000000     0.35349910    -0.19053324 wJ_E\vP  
TSTX   2             0.20000000     0.35349910    -0.19053324 }}a<!L,{  
TSTY   1            -0.20000000     0.42678383    -0.11724851 "Aw| 7XII  
TSTY   1             0.20000000     0.42678383    -0.11724851 fo63H'7  
TSTX   1            -0.20000000     0.42678383    -0.11724851 #qk}e4u  
TSTX   1             0.20000000     0.42678383    -0.11724851 9N(<OY+Dgm  
TSTY   3            -0.20000000     0.42861670    -0.11541563 "j+zd&*={  
TSTY   3             0.20000000     0.42861670    -0.11541563 s: c  
L8<Yk`jx  
Estimated Performance Changes based upon Root-Sum-Square method: TNs0^h)  
Nominal MTF                 :     0.54403234 az7<@vSXi  
Estimated change            :    -0.36299231 P0m;AqS#R  
Estimated MTF               :     0.18104003 +PC<#  
rbP" n)0=  
Compensator Statistics: qaBjV6loy  
Change in back focus: %|(~k*s4  
Minimum            :        -0.000000 b .9]b  
Maximum            :         0.000000 c5_?jKpl  
Mean               :        -0.000000 ;6N@raP7  
Standard Deviation :         0.000000 Nrl&"IK|J  

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Monte Carlo Analysis: )A]
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Number of trials: 20 "hRw_<  
ZN)a}\]  
Initial Statistics: Normal Distribution *uYnu|UQH  
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  Trial       Criterion        Change r!eCfV7  
      1     0.42804416    -0.11598818 8fpaY{]  
Change in Focus                :      -0.400171 lf3:Z5*&>  
      2     0.54384387    -0.00018847 Ro+/=*ql~  
Change in Focus                :       1.018470 {e,m<mAi  
      3     0.44510003    -0.09893230 :0BaEqX  
Change in Focus                :      -0.601922 @
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      4     0.18154684    -0.36248550 pm<zw-  
Change in Focus                :       0.920681 $KL5Z#K  
      5     0.28665820    -0.25737414 XcJ'w  
Change in Focus                :       1.253875 ,RFcR[ak  
      6     0.21263372    -0.33139862 [3`T/Wm  
Change in Focus                :      -0.903878 1nh2()QI[  
      7     0.40051424    -0.14351809 =re1xR!E5  
Change in Focus                :      -1.354815 <Sn5ME<*  
      8     0.48754161    -0.05649072 @F_#d)+%>  
Change in Focus                :       0.215922 q|J3]F !n  
      9     0.40357468    -0.14045766 0dhJ# [
Y  
Change in Focus                :       0.281783 5q[0;`J  
     10     0.26315315    -0.28087919 zR)|%[sWwQ  
Change in Focus                :      -1.048393 Ij>x3L\-  
     11     0.26120585    -0.28282649 +O23@G?
x  
Change in Focus                :       1.017611 ]E90q/s@c  
     12     0.24033815    -0.30369419 >So)KB  
Change in Focus                :      -0.109292 ]saf<?fzr  
     13     0.37164046    -0.17239188 (j-[m\wF  
Change in Focus                :      -0.692430 R4,j
  
     14     0.48597489    -0.05805744 hx$-d}W{  
Change in Focus                :      -0.662040 )f4D2c&VE  
     15     0.21462327    -0.32940907
X#mm Z;P  
Change in Focus                :       1.611296 Sc "J5^  
     16     0.43378226    -0.11025008 M-KjRl  
Change in Focus                :      -0.640081 P/._ tQu6  
     17     0.39321881    -0.15081353 d>:(>@wz  
Change in Focus                :       0.914906 _+K[1P  
     18     0.20692530    -0.33710703 89KX.d  
Change in Focus                :       0.801607 uAT01ZEm  
     19     0.51374068    -0.03029165 'UO,DFq[Fl  
Change in Focus                :       0.947293 5J1A|qII  
     20     0.38013374    -0.16389860 'pOtd7Vr  
Change in Focus                :       0.667010 Q[i/]  
{Q8DPkW  
Number of traceable Monte Carlo files generated: 20 iZ+\vO?|  
1E!0N`E  
Nominal     0.54403234 xKKL4ws  
Best        0.54384387    Trial     2 S1^u/$*6  
Worst       0.18154684    Trial     4 ZjLzS]\a  
Mean        0.35770970 D"fE )@Q@Y  
Std Dev     0.11156454 ann!"s_  
)F 6#n&2  
v=?U{{
xQ  
Compensator Statistics: j.4oYxK!s/  
Change in back focus: SV.\B  
Minimum            :        -1.354815 DG1  >T  
Maximum            :         1.611296 j[YzBXd V  
Mean               :         0.161872 }gL9G  
Standard Deviation :         0.869664 xd8UdQ,lt  
s)<#a(!  
90% >       0.20977951               +uW$/_Y$  
80% >       0.22748071               i%H_ua  
50% >       0.38667627               I,Q"<?&  
20% >       0.46553746               o9M[Zr1@k  
10% >       0.50064115                0~RsdQGqC  
6\4ny0  
End of Run. WMBntB   
Z
C3b9:tk  
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 35Nwx<  

图片:3.JPG

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DR/qe0D  
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 ?_[xpK()  
o#E 3{zM  
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                 zy4AFW  
80% >       0.22748071                 rMSB|*
_  
50% >       0.38667627                 O+`^]D7  
20% >       0.46553746                 1O45M/5\o  
10% >       0.50064115 m(nlu  
!$AVlMnJ  
最后这个数值是MTF值呢，还是MTF的公差？ x+|Fw d  
t*<vc]D  
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？？？   jd l1Q<Z  
/V~L:0%  
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  : FAM`+QtNw  
90% >       0.20977951                 FVY,CeA.  
80% >       0.22748071                 3 %DA{  
50% >       0.38667627                 KG>.7xVWV7  
20% >       0.46553746                 +V2a|uvEc  
10% >       0.50064115 EyBdL  
....... FT|*~_@  

|]GEJUWtCd  
DIk$9$"<x  
这些数值都是MTF值

Criterion           : Geometric MTF average S&T at 30.0000 cycles per mm   A:D\!5=  
Mode                : Sensitivities AP@xZ%;K  
Sampling            : 2 $hKgTf?  
Nominal Criterion   : 0.54403234 W!X#:UM)  
Test Wavelength     : 0.6328 J&3;6
I &  
PU'v o4  
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？ 9723f1&Vd  
Fe=4^.  
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