[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 ge$p/  
#PA 9bM  

图片:1.JPG

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然后添加了默认公差分析，基本没变 H.!\j&4j  
7tU=5@M9D  

图片:2.jpg

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然后运行分析的结果如下： IF<<6.tz  
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Analysis of Tolerances W=!di3IA  
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File : E:\光学设计资料\zemax练习\f500.ZMX '\/|K  
Title: fzW!-  
Date : TUE JUN 21 2011 ,];QzENw  
,g{Ob{qT  
Units are Millimeters. tZ_D.syBAc  
All changes are computed using linear differences. ;hJz'&UWQ  
oaM3#QJ  
Paraxial Focus compensation only. L31#v$
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05Y4=7,!  
WARNING: Solves should be removed prior to tolerancing. ;.&k zzvJ  
EOzw&M];r  
Mnemonics: 6"u"B-cz  
TFRN: Tolerance on curvature in fringes. .dTXC'  
TTHI: Tolerance on thickness. |,WP)  
TSDX: Tolerance on surface decentering in x. 0E/,l``p  
TSDY: Tolerance on surface decentering in y. +`'>  
TSTX: Tolerance on surface tilt in x (degrees). R9)"%SO<y  
TSTY: Tolerance on surface tilt in y (degrees). m53
~Ysq<
 
TIRR: Tolerance on irregularity (fringes). m"RSDM!  
TIND: Tolerance on Nd index of refraction. 9]PMti  
TEDX: Tolerance on element decentering in x. Z:Y_{YAD  
TEDY: Tolerance on element decentering in y. 0{!+N6MiR  
TETX: Tolerance on element tilt in x (degrees). B
Fn4H%1  
TETY: Tolerance on element tilt in y (degrees). G
?5Vj_n  
K)s{D]B  
WARNING: RAY AIMING IS OFF. Very loose tolerances may not be computed accurately. Q;y)6+VU4  
cX4I+Mf  
WARNING: Boundary constraints on compensators will be ignored. %SN"<O!  
W?R@ eq.9  
Criterion           : Geometric MTF average S&T at 30.0000 cycles per mm J @^Ypq  
Mode                : Sensitivities X@H/"B%u2  
Sampling            : 2 R 9b0D>Lxt  
Nominal Criterion   : 0.54403234 W9/HM!  
Test Wavelength     : 0.6328 ]Wx?k7T  
\,-e>  
l3HfaCP6:  
Fields: XY Symmetric Angle in degrees  } @4by<  
#      X-Field      Y-Field       Weight    VDX    VDY    VCX    VCY \<W/Z.}/  
1   0.000E+000   0.000E+000   1.000E+000  0.000  0.000  0.000  0.000 Ln"D .gpq  
W>y&  
Sensitivity Analysis: -DL"Yw}  
rIQ%X`Y  
                 |----------------- Minimum ----------------| |----------------- Maximum ----------------| Fb\ E39  
Type                      Value      Criterion        Change          Value      Criterion        Change 4{CeV7  
Fringe tolerance on surface 1 ';KWHk8C  
TFRN   1            -1.00000000     0.54257256    -0.00145977     1.00000000     0.54548607     0.00145374 8\Kpc;zb  
Change in Focus                :      -0.000000                            0.000000 KK, t!a  
Fringe tolerance on surface 2 w5* Z\t5  
TFRN   2            -1.00000000     0.54177471    -0.00225762     1.00000000     0.54627463     0.00224230 ~+CEek  
Change in Focus                :       0.000000                            0.000000 F-%Hw  
Fringe tolerance on surface 3 |}isSCt  
TFRN   3            -1.00000000     0.54779866     0.00376632     1.00000000     0.54022572    -0.00380662 NY"+Qw@$  
Change in Focus                :      -0.000000                            0.000000 *1g3,NMA  
Thickness tolerance on surface 1 ]\(Ho   
TTHI   1   3        -0.20000000     0.54321462    -0.00081772     0.20000000     0.54484759     0.00081525 0t2n7Y?N  
Change in Focus                :       0.000000                            0.000000 W}'l8z]   
Thickness tolerance on surface 2 ^"] ]rZ)  
TTHI   2   3        -0.20000000     0.54478712     0.00075478     0.20000000     0.54327558    -0.00075675 BD?u|Fd,i:  
Change in Focus                :       0.000000                           -0.000000 ob]j1gYb  
Decenter X tolerance on surfaces 1 through 3 vC!B}~RG  
TEDX   1   3        -0.20000000     0.54401464   -1.7700E-005     0.20000000     0.54401464   -1.7700E-005 =2e{T J/  
Change in Focus                :       0.000000                            0.000000 y_LFkZ
 
Decenter Y tolerance on surfaces 1 through 3 __|Y59J%  
TEDY   1   3        -0.20000000     0.54401464   -1.7700E-005     0.20000000     0.54401464   -1.7700E-005 N^f_hL|:9  
Change in Focus                :       0.000000                            0.000000 q0L\{  
Tilt X tolerance on surfaces 1 through 3 (degrees) cyBm,!  
TETX   1   3        -0.20000000     0.54897548     0.00494314     0.20000000     0.54897548     0.00494314 l4*vM  
Change in Focus                :       0.000000                            0.000000 xiOAj"}
~  
Tilt Y tolerance on surfaces 1 through 3 (degrees) dF$&fo%  
TETY   1   3        -0.20000000     0.54897548     0.00494314     0.20000000     0.54897548     0.00494314 1 RVs!;  
Change in Focus                :       0.000000                            0.000000 ^X ~S}MX  
Decenter X tolerance on surface 1 U3~rtc*  
TSDX   1            -0.20000000     0.53999563    -0.00403671     0.20000000     0.53999563    -0.00403671 QzS=oiL  
Change in Focus                :       0.000000                            0.000000 NK6~qWsu  
Decenter Y tolerance on surface 1 qW`DCZu  
TSDY   1            -0.20000000     0.53999563    -0.00403671     0.20000000     0.53999563    -0.00403671 $g_|U:,  
Change in Focus                :       0.000000                            0.000000 [C{oj*"c]  
Tilt X tolerance on surface (degrees) 1 *JF7
B  
TSTX   1            -0.20000000     0.42678383    -0.11724851     0.20000000     0.42678383    -0.11724851 <b-OdOg  
Change in Focus                :       0.000000                            0.000000 =HjC.h  
Tilt Y tolerance on surface (degrees) 1 %#TAz7  
TSTY   1            -0.20000000     0.42678383    -0.11724851     0.20000000     0.42678383    -0.11724851 DdqE6qE  
Change in Focus                :       0.000000                            0.000000 .S[M:<<*  
Decenter X tolerance on surface 2 4Q:r83#  
TSDX   2            -0.20000000     0.51705427    -0.02697807     0.20000000     0.51705427    -0.02697807 ~rlPS#]o  
Change in Focus                :       0.000000                            0.000000 #=N6[:,  
Decenter Y tolerance on surface 2 rlY n"3%  
TSDY   2            -0.20000000     0.51705427    -0.02697807     0.20000000     0.51705427    -0.02697807 kK=f@
l  
Change in Focus                :       0.000000                            0.000000 yM('!iG*/  
Tilt X tolerance on surface (degrees) 2 ?-JW2 E"uT  
TSTX   2            -0.20000000     0.35349910    -0.19053324     0.20000000     0.35349910    -0.19053324 `*3;sq%`  
Change in Focus                :       0.000000                            0.000000 31cZ
6[  
Tilt Y tolerance on surface (degrees) 2 9XmbH
S[0V  
TSTY   2            -0.20000000     0.35349910    -0.19053324     0.20000000     0.35349910    -0.19053324 QL:Qzr[  
Change in Focus                :       0.000000                            0.000000 >dXB)yl  
Decenter X tolerance on surface 3 d)GR]^=r  
TSDX   3            -0.20000000     0.53419039    -0.00984195     0.20000000     0.53419039    -0.00984195 F},kfCFF  
Change in Focus                :       0.000000                            0.000000 %E[ $np>  
Decenter Y tolerance on surface 3 S 9|^VU  
TSDY   3            -0.20000000     0.53419039    -0.00984195     0.20000000     0.53419039    -0.00984195 !m8T< LtMl  
Change in Focus                :       0.000000                            0.000000 (t5vBUj  
Tilt X tolerance on surface (degrees) 3 mYbu1542'n  
TSTX   3            -0.20000000     0.42861670    -0.11541563     0.20000000     0.42861670    -0.11541563 VFq
7nV/O  
Change in Focus                :       0.000000                            0.000000 /9
o6R:B  
Tilt Y tolerance on surface (degrees) 3 iy|;xBI,  
TSTY   3            -0.20000000     0.42861670    -0.11541563     0.20000000     0.42861670    -0.11541563 ;@qQ^!g2  
Change in Focus                :       0.000000                            0.000000 ^%O$7*  
Irregularity of surface 1 in fringes Q-J} :U  
TIRR   1            -0.20000000     0.50973587    -0.03429647     0.20000000     0.57333868     0.02930634 NIHcX6Nw  
Change in Focus                :       0.000000                            0.000000 A3|2;4t  
Irregularity of surface 2 in fringes WO$8j2!~#  
TIRR   2            -0.20000000     0.53400904    -0.01002330     0.20000000     0.55360281     0.00957047 sl`?9-_[  
Change in Focus                :       0.000000                            0.000000 g){gF(  
Irregularity of surface 3 in fringes 0-p %.}GE  
TIRR   3            -0.20000000     0.58078982     0.03675748     0.20000000     0.49904394    -0.04498840 q8MyEoc:n  
Change in Focus                :       0.000000                            0.000000 Zt}b}Bz  
Index tolerance on surface 1 MAQ-'s@  
TIND   1            -0.00100000     0.52606778    -0.01796456     0.00100000     0.56121811     0.01718578 -@Z9h)G|  
Change in Focus                :       0.000000                            0.000000 k ~4o`eA  
Index tolerance on surface 2 h+w1 D}*  
TIND   2            -0.00100000     0.55639086     0.01235852     0.00100000     0.53126361    -0.01276872 ra8AUj~RX  
Change in Focus                :       0.000000                           -0.000000 DABV}@K"  
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Worst offenders: mR$0Ij/v  
Type                      Value      Criterion        Change zXk^ugFy  
TSTY   2            -0.20000000     0.35349910    -0.19053324 8%p+:6kP5  
TSTY   2             0.20000000     0.35349910    -0.19053324 jOZ>^5}  
TSTX   2            -0.20000000     0.35349910    -0.19053324 `5
n^DP*X  
TSTX   2             0.20000000     0.35349910    -0.19053324 t ?05  
TSTY   1            -0.20000000     0.42678383    -0.11724851 yq!peFu  
TSTY   1             0.20000000     0.42678383    -0.11724851 2OjU3z<J  
TSTX   1            -0.20000000     0.42678383    -0.11724851 iLNO}EUL  
TSTX   1             0.20000000     0.42678383    -0.11724851 bI8')a  
TSTY   3            -0.20000000     0.42861670    -0.11541563 BZIU@^Q_Y[  
TSTY   3             0.20000000     0.42861670    -0.11541563 0^)~p{Zh  
OW#G{#.6R  
Estimated Performance Changes based upon Root-Sum-Square method: _-2;!L#/  
Nominal MTF                 :     0.54403234 H9Vn(A8&`  
Estimated change            :    -0.36299231 Mm!;+bM%  
Estimated MTF               :     0.18104003 8:2Vib$  
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Compensator Statistics: v1/Y0  
Change in back focus: HY;kV6g{P  
Minimum            :        -0.000000 &UO/p/a
 
Maximum            :         0.000000 aGAr24]y  
Mean               :        -0.000000 >h.HW  
Standard Deviation :         0.000000 x4,[5N"}YK  
7jGfQ  
Monte Carlo Analysis: *?A!`JpJn  
Number of trials: 20 =CO'LyG  
{XV'C@B  
Initial Statistics: Normal Distribution %'VzN3Q5V  
(EH}lh}%  
  Trial       Criterion        Change 3QF[@8EH{  
      1     0.42804416    -0.11598818 S+*>""=  
Change in Focus                :      -0.400171 -Ir>pY\!  
      2     0.54384387    -0.00018847 RL H!f1cta  
Change in Focus                :       1.018470 iiWpmE<,  
      3     0.44510003    -0.09893230 UID`3X  
Change in Focus                :      -0.601922 xrI9t?QaCb  
      4     0.18154684    -0.36248550 "U$](k.<VA  
Change in Focus                :       0.920681 $LcMG,8%_  
      5     0.28665820    -0.25737414 xNa66A-8  
Change in Focus                :       1.253875 f{uS  
      6     0.21263372    -0.33139862 cucT|y  
Change in Focus                :      -0.903878 8L
]Cc!~  
      7     0.40051424    -0.14351809 4J?\JcGs  
Change in Focus                :      -1.354815 -9Ygn_M  
      8     0.48754161    -0.05649072 #w8.aNU+]  
Change in Focus                :       0.215922 Mb45UG#2  
      9     0.40357468    -0.14045766 jy_4W!4a  
Change in Focus                :       0.281783 b5ul|p  
     10     0.26315315    -0.28087919 ux,eY  
Change in Focus                :      -1.048393 GkI{7GD:z  
     11     0.26120585    -0.28282649 )1$H7|  
Change in Focus                :       1.017611 yo%Nz"  
     12     0.24033815    -0.30369419 `b%^_@Fb  
Change in Focus                :      -0.109292 N8=-=]0G  
     13     0.37164046    -0.17239188 U* uMMb}$  
Change in Focus                :      -0.692430 l}k'ZX4  
     14     0.48597489    -0.05805744 LI^D\  
Change in Focus                :      -0.662040 o/[Ks;l  
     15     0.21462327    -0.32940907 =NSunW!  
Change in Focus                :       1.611296 EQX<<x
"  
     16     0.43378226    -0.11025008 }:QoYNq  
Change in Focus                :      -0.640081 ",#Ug"|2  
     17     0.39321881    -0.15081353 F&B E+b/#  
Change in Focus                :       0.914906 3+q-yP#X  
     18     0.20692530    -0.33710703 jhBfy|Ftu  
Change in Focus                :       0.801607 if3z Fh  
     19     0.51374068    -0.03029165 Om_ "X6  
Change in Focus                :       0.947293 -Owb@
Nw  
     20     0.38013374    -0.16389860 5=}CZYWB  
Change in Focus                :       0.667010 `:jF%3ks+0  
N/<c;"o  
Number of traceable Monte Carlo files generated: 20 7#X`D  
k~
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Nominal     0.54403234 1=ZQRJW0B  
Best        0.54384387    Trial     2 P0U&+^W"9  
Worst       0.18154684    Trial     4 wDW/?lT&  
Mean        0.35770970 F+j"bhe  
Std Dev     0.11156454 &JD^\+7U:  
`LKf$cx(A  
XQmg^x[,A  
Compensator Statistics: 8*|*@  
Change in back focus: \< a^5'  
Minimum            :        -1.354815 fhNJB0  
Maximum            :         1.611296 >6IUle>z  
Mean               :         0.161872 !DV0u)k(  
Standard Deviation :         0.869664 Og8%SnEpMI  
x?od_M;*8;  
90% >       0.20977951               } :gi<#-:G  
80% >       0.22748071               |KO[[4b ?+  
50% >       0.38667627               *y$CDv
  
20% >       0.46553746               kf#S"[/E  
10% >       0.50064115                !f}D*8\f  
~-uDN)  
End of Run. P{Q$(rOe  
%:Y(x$Qy  
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 0%,?z`UY  

图片:3.JPG

IGab~`c-[  

#\O'*mz  
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 !1A< jL  
{~G~=sC$  
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                 }OTJ{eG  
80% >       0.22748071                 17 
0r5  
50% >       0.38667627                 x3.,zfWs  
20% >       0.46553746                 wM3m'# xJ  
10% >       0.50064115 5g$>J)Ry  
IS;[oJef  
最后这个数值是MTF值呢，还是MTF的公差？ Z%=A[`5]  
EWv[Sp  
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？？？   :_=YH+bZ  
lvNi/jk  
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  :  a3a:H  
90% >       0.20977951                 crSqbL  
80% >       0.22748071                
GxC\Nj#  
50% >       0.38667627                 YIb7y1\UM  
20% >       0.46553746                 o#BI_#b  
10% >       0.50064115 \g)?7>M|  
....... \b$Y_  

{G<1.  
Sl%6F!  
这些数值都是MTF值

Criterion           : Geometric MTF average S&T at 30.0000 cycles per mm   ~lqNWL^l  
Mode                : Sensitivities PpF`0w=1%l  
Sampling            : 2 >!tfvM2X{  
Nominal Criterion   : 0.54403234 :2:%  
Test Wavelength     : 0.6328 hPCSAo!|  
S?VKzVDB.S  
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？ 1(%6X*z  
wjT#D|soI  
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