[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 `E%(pjG  
j,ZW[*M  

图片:1.JPG

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然后添加了默认公差分析，基本没变 ;$[VX/A`f  
*|CLO|B)  

图片:2.jpg

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然后运行分析的结果如下： X%35XC.n  
HMQ'b(a'  
Analysis of Tolerances }kv)IJ  
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File : E:\光学设计资料\zemax练习\f500.ZMX jiOf')d5  
Title: \hu':@}  
Date : TUE JUN 21 2011 IwnYJp:9v  
;\q<zO@x  
Units are Millimeters. =Y:5,.U  
All changes are computed using linear differences. MsSoX9A{D  
'bG1U`v=3  
Paraxial Focus compensation only. 6O]Xhe0d@  
T+3k$G[e/  
WARNING: Solves should be removed prior to tolerancing. {\F2*P  
Jn60i6/  
Mnemonics: m_~y  
TFRN: Tolerance on curvature in fringes. )m)h/_  
TTHI: Tolerance on thickness. QM7[O]@  
TSDX: Tolerance on surface decentering in x. i{4'cdr?  
TSDY: Tolerance on surface decentering in y. d7\k gh  
TSTX: Tolerance on surface tilt in x (degrees). w# xncH:1  
TSTY: Tolerance on surface tilt in y (degrees). !+%Az*ik  
TIRR: Tolerance on irregularity (fringes). c;nx59w]q  
TIND: Tolerance on Nd index of refraction. nJW_a&'  
TEDX: Tolerance on element decentering in x. r$Yh)rp
t:  
TEDY: Tolerance on element decentering in y. yr (g~MQ  
TETX: Tolerance on element tilt in x (degrees). }i
sCvb  
TETY: Tolerance on element tilt in y (degrees).  %L{  
\;'_|bu3.  
WARNING: RAY AIMING IS OFF. Very loose tolerances may not be computed accurately. j#4+-  
(xjqB{U  
WARNING: Boundary constraints on compensators will be ignored.
o8iig5bp  
z^YeMe  
Criterion           : Geometric MTF average S&T at 30.0000 cycles per mm k q/t]%(  
Mode                : Sensitivities HIQ]"Hl  
Sampling            : 2 !4i,%Z&6  
Nominal Criterion   : 0.54403234 {c&qB`y<.  
Test Wavelength     : 0.6328 =I %g;YK  
(X0`1s  
6sO  
Fields: XY Symmetric Angle in degrees $@5%5  
#      X-Field      Y-Field       Weight    VDX    VDY    VCX    VCY )R8%wk?2  
1   0.000E+000   0.000E+000   1.000E+000  0.000  0.000  0.000  0.000 Smi%dp.  
XPGL3[w\V  
Sensitivity Analysis: F]/L!   
ecM4]U  
                 |----------------- Minimum ----------------| |----------------- Maximum ----------------| UZ[/aq  
Type                      Value      Criterion        Change          Value      Criterion        Change NKupOJJq  
Fringe tolerance on surface 1 K
'a#Mg  
TFRN   1            -1.00000000     0.54257256    -0.00145977     1.00000000     0.54548607     0.00145374 pjaiAe!k  
Change in Focus                :      -0.000000                            0.000000 nNd`]F^U  
Fringe tolerance on surface 2 -G(3Y2  
TFRN   2            -1.00000000     0.54177471    -0.00225762     1.00000000     0.54627463     0.00224230 h[Ndtq>3{  
Change in Focus                :       0.000000                            0.000000 OHx,*
}N  
Fringe tolerance on surface 3 %AzPAWcN  
TFRN   3            -1.00000000     0.54779866     0.00376632     1.00000000     0.54022572    -0.00380662 r\4*\  
Change in Focus                :      -0.000000                            0.000000 ,eZ;8W{G  
Thickness tolerance on surface 1 {QIS411  
TTHI   1   3        -0.20000000     0.54321462    -0.00081772     0.20000000     0.54484759     0.00081525 [8B tIv  
Change in Focus                :       0.000000                            0.000000 7F>gj  
Thickness tolerance on surface 2 94Kuy@0:+  
TTHI   2   3        -0.20000000     0.54478712     0.00075478     0.20000000     0.54327558    -0.00075675 .5jnKU8NF  
Change in Focus                :       0.000000                           -0.000000  '7S!6kd?  
Decenter X tolerance on surfaces 1 through 3 {mCKTyN+  
TEDX   1   3        -0.20000000     0.54401464   -1.7700E-005     0.20000000     0.54401464   -1.7700E-005 ;:#?~%7>  
Change in Focus                :       0.000000                            0.000000 Td["l!-fe  
Decenter Y tolerance on surfaces 1 through 3 uW\@x4  
TEDY   1   3        -0.20000000     0.54401464   -1.7700E-005     0.20000000     0.54401464   -1.7700E-005 X|lElN  
Change in Focus                :       0.000000                            0.000000 ]Ct`4pA  
Tilt X tolerance on surfaces 1 through 3 (degrees) =;'ope(?S  
TETX   1   3        -0.20000000     0.54897548     0.00494314     0.20000000     0.54897548     0.00494314 ~u O:tL  
Change in Focus                :       0.000000                            0.000000 {<''OwQF~+  
Tilt Y tolerance on surfaces 1 through 3 (degrees) Uxj<x`<1x  
TETY   1   3        -0.20000000     0.54897548     0.00494314     0.20000000     0.54897548     0.00494314 E|F!S(.:,M  
Change in Focus                :       0.000000                            0.000000 j]@x Q,y  
Decenter X tolerance on surface 1 a2(D!_dZR  
TSDX   1            -0.20000000     0.53999563    -0.00403671     0.20000000     0.53999563    -0.00403671 WI*^+E&=*  
Change in Focus                :       0.000000                            0.000000 1B9
Fb.i  
Decenter Y tolerance on surface 1 ;PP_3`  
TSDY   1            -0.20000000     0.53999563    -0.00403671     0.20000000     0.53999563    -0.00403671 KZp,=[t  
Change in Focus                :       0.000000                            0.000000 CrRQPgl+u  
Tilt X tolerance on surface (degrees) 1 m<X#W W)N  
TSTX   1            -0.20000000     0.42678383    -0.11724851     0.20000000     0.42678383    -0.11724851 -Fp!w"=T  
Change in Focus                :       0.000000                            0.000000 i5L+8kx4  
Tilt Y tolerance on surface (degrees) 1 4U LJtM3  
TSTY   1            -0.20000000     0.42678383    -0.11724851     0.20000000     0.42678383    -0.11724851 @1J51< x  
Change in Focus                :       0.000000                            0.000000 ZTgAZ5_cz  
Decenter X tolerance on surface 2 `g4Ekp'Rp[  
TSDX   2            -0.20000000     0.51705427    -0.02697807     0.20000000     0.51705427    -0.02697807 ]noP  
Change in Focus                :       0.000000                            0.000000 n6}E4E
no  
Decenter Y tolerance on surface 2 '0])7jq  
TSDY   2            -0.20000000     0.51705427    -0.02697807     0.20000000     0.51705427    -0.02697807 q>D4m
a^  
Change in Focus                :       0.000000                            0.000000 ,N))=/  
Tilt X tolerance on surface (degrees) 2 <ZHY3  
TSTX   2            -0.20000000     0.35349910    -0.19053324     0.20000000     0.35349910    -0.19053324 Q*mMF@-:  
Change in Focus                :       0.000000                            0.000000 VrnK)za*H  
Tilt Y tolerance on surface (degrees) 2 c1)BGy
li  
TSTY   2            -0.20000000     0.35349910    -0.19053324     0.20000000     0.35349910    -0.19053324 *tbpFk4/  
Change in Focus                :       0.000000                            0.000000 yPzULO4  
Decenter X tolerance on surface 3 Xd19GP!  
TSDX   3            -0.20000000     0.53419039    -0.00984195     0.20000000     0.53419039    -0.00984195 #um1?V  
Change in Focus                :       0.000000                            0.000000 -Z/6;2
Q  
Decenter Y tolerance on surface 3 Y7b,td1  
TSDY   3            -0.20000000     0.53419039    -0.00984195     0.20000000     0.53419039    -0.00984195 [#,X$O>  
Change in Focus                :       0.000000                            0.000000 Gct&}]3pm  
Tilt X tolerance on surface (degrees) 3 \U<F\i  
TSTX   3            -0.20000000     0.42861670    -0.11541563     0.20000000     0.42861670    -0.11541563 @2%VU#!m  
Change in Focus                :       0.000000                            0.000000 8IT_mjj  
Tilt Y tolerance on surface (degrees) 3 C,VqT6E<  
TSTY   3            -0.20000000     0.42861670    -0.11541563     0.20000000     0.42861670    -0.11541563 ~q#[5l(r8  
Change in Focus                :       0.000000                            0.000000 6>LQGO  
Irregularity of surface 1 in fringes 6/V{>MTZg  
TIRR   1            -0.20000000     0.50973587    -0.03429647     0.20000000     0.57333868     0.02930634 ~'Qpf 8)  
Change in Focus                :       0.000000                            0.000000 ]'1N_m]?  
Irregularity of surface 2 in fringes [6RV'7`Abj  
TIRR   2            -0.20000000     0.53400904    -0.01002330     0.20000000     0.55360281     0.00957047 +lDGr/  
Change in Focus                :       0.000000                            0.000000 !7,K9/"  
Irregularity of surface 3 in fringes 8Jib|#!  
TIRR   3            -0.20000000     0.58078982     0.03675748     0.20000000     0.49904394    -0.04498840 )z*$`?)k  
Change in Focus                :       0.000000                            0.000000 X"qbB4(I  
Index tolerance on surface 1 S8W_$=4  
TIND   1            -0.00100000     0.52606778    -0.01796456     0.00100000     0.56121811     0.01718578 ]' "^M  
Change in Focus                :       0.000000                            0.000000 &]"_pc/>m  
Index tolerance on surface 2 qu#@F\gX  
TIND   2            -0.00100000     0.55639086     0.01235852     0.00100000     0.53126361    -0.01276872 F|n$0vQ*  
Change in Focus                :       0.000000                           -0.000000 LF-+5`  
0-&sJ  
Worst offenders: #LNB@E  
Type                      Value      Criterion        Change [ ;3EzZL  
TSTY   2            -0.20000000     0.35349910    -0.19053324 43orR !.Z  
TSTY   2             0.20000000     0.35349910    -0.19053324 H
/v37%p7  
TSTX   2            -0.20000000     0.35349910    -0.19053324 Y(G*Yi?;  
TSTX   2             0.20000000     0.35349910    -0.19053324 -SC2Zgi)A  
TSTY   1            -0.20000000     0.42678383    -0.11724851 |+4E 8;4_  
TSTY   1             0.20000000     0.42678383    -0.11724851
(J,Oh  
TSTX   1            -0.20000000     0.42678383    -0.11724851  ]5)&36  
TSTX   1             0.20000000     0.42678383    -0.11724851 g:HbmXOBpj  
TSTY   3            -0.20000000     0.42861670    -0.11541563 x"C93ft[  
TSTY   3             0.20000000     0.42861670    -0.11541563 ezq q@t9  
A0N ;VYv  
Estimated Performance Changes based upon Root-Sum-Square method: ^) b7m  
Nominal MTF                 :     0.54403234 8L9S^ '  
Estimated change            :    -0.36299231 U}vtVvx  
Estimated MTF               :     0.18104003 pg}DC0a  
L+0N@`nRF  
Compensator Statistics: -WHwz m  
Change in back focus: i]^*J1
a  
Minimum            :        -0.000000 /+JP~K  
Maximum            :         0.000000 Dk{nOvZu<  
Mean               :        -0.000000 )V+Dqh,-g  
Standard Deviation :         0.000000 5-Qv
Q&eH.  
3z/O`z  
Monte Carlo Analysis: C7*Yg$`{  
Number of trials: 20 0 *Yivx6  
|#khwH  
Initial Statistics: Normal Distribution t"74HZO>  
?k7/`gU  
  Trial       Criterion        Change a~N)qYL:  
      1     0.42804416    -0.11598818 aid)q&AcQ  
Change in Focus                :      -0.400171 *.;}OX^X  
      2     0.54384387    -0.00018847 jQwg)E+o;  
Change in Focus                :       1.018470 c,s<q j  
      3     0.44510003    -0.09893230 ewff(e9  
Change in Focus                :      -0.601922 [r< Y0|l,m  
      4     0.18154684    -0.36248550 Hd@T8 D*A  
Change in Focus                :       0.920681 +P6  
      5     0.28665820    -0.25737414 /7HIL?r  
Change in Focus                :       1.253875 TX5/{cHd  
      6     0.21263372    -0.33139862 :w`i  
Change in Focus                :      -0.903878 6V_5BpXt  
      7     0.40051424    -0.14351809 FVLA^$5c  
Change in Focus                :      -1.354815 b8-^wJH!  
      8     0.48754161    -0.05649072 vR.6^q  
Change in Focus                :       0.215922 8w@jUGsc  
      9     0.40357468    -0.14045766 By"ul:.D  
Change in Focus                :       0.281783 1ZH8/1gWI  
     10     0.26315315    -0.28087919 oO9iB:w  
Change in Focus                :      -1.048393 [~r$US  
     11     0.26120585    -0.28282649 $HnD|
_*  
Change in Focus                :       1.017611 5<ya;iK  
     12     0.24033815    -0.30369419 W;xLuKIG  
Change in Focus                :      -0.109292 ,4I6RwB.  
     13     0.37164046    -0.17239188 xx2:5  
Change in Focus                :      -0.692430 &(U=O?r7  
     14     0.48597489    -0.05805744 C&K(({5O  
Change in Focus                :      -0.662040 L$07u{Q  
     15     0.21462327    -0.32940907 7^}Z%c  
Change in Focus                :       1.611296 9*Mg<P"  
     16     0.43378226    -0.11025008 a+Qj[pS  
Change in Focus                :      -0.640081 z&G3&?Z  
     17     0.39321881    -0.15081353 Rn^N+3o'M  
Change in Focus                :       0.914906 sy#j+gZ   
     18     0.20692530    -0.33710703 @[N~;>  
Change in Focus                :       0.801607 f2K3*}P  
     19     0.51374068    -0.03029165 vP;tgW9Qk  
Change in Focus                :       0.947293 nQ*oOxe|X  
     20     0.38013374    -0.16389860 K?<Odw'k  
Change in Focus                :       0.667010 9Yne=R/]  
7.'j~hJL  
Number of traceable Monte Carlo files generated: 20 )W7H{#  
wx7>0[zE  
Nominal     0.54403234 UVRV7^eTe  
Best        0.54384387    Trial     2 \A"a>e  
Worst       0.18154684    Trial     4 0 #; s{7k  
Mean        0.35770970 $f-pLF+x  
Std Dev     0.11156454 ?fwr:aP~  
<}>-ip?  
 ^*>no=A  
Compensator Statistics: E*]L]vR  
Change in back focus: z>#$#:Z4  
Minimum            :        -1.354815 Wl"fh_  
Maximum            :         1.611296 ^Q:`2C5  
Mean               :         0.161872 3]82gZGG  
Standard Deviation :         0.869664 Z.f<6<gF  
8#3cmpx4  
90% >       0.20977951               m/c~2?-;  
80% >       0.22748071               !: [` V!{  
50% >       0.38667627               : .e
S|  
20% >       0.46553746               D#(Pg  
10% >       0.50064115                q"vT]=Y}:  
#!<s& f|O  
End of Run. Gs?sO?j  
[_GR'x'0x  
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 6iS+3+  

图片:3.JPG

C_&tOt  
:njUaMFoMA  
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 Wsz9X;  
dz DssAHy  
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                 CbQ%[x9|  
80% >       0.22748071                 1Sr}2@>  
50% >       0.38667627                 x F#)T*  
20% >       0.46553746                 y->iv%
 
10% >       0.50064115 7u(i4O& k  
j_g9RmZT  
最后这个数值是MTF值呢，还是MTF的公差？ zAIC5fvu  
C$;~=  
也就是说，这到底是有90%的产品MTF大于0.20977951还是90%的产品的MTF变化量大于0.20977951？？？   ]y$C6iUY*  
gA*zFhGVS7  
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  : 1?;s!6=  
90% >       0.20977951                 |O
NOF  
80% >       0.22748071                 A'T! og|5  
50% >       0.38667627                 (Y86q\DQ?|  
20% >       0.46553746                 #+$z`C`  
10% >       0.50064115 y!j1xnzki  
....... 4I$#R  

H4U;~)i  
>*&[bW'}?  
这些数值都是MTF值

Criterion           : Geometric MTF average S&T at 30.0000 cycles per mm   `y4+OXZ^  
Mode                : Sensitivities ~be&T:7.  
Sampling            : 2 `KZ}smMA  
Nominal Criterion   : 0.54403234 ?AR6+`0  
Test Wavelength     : 0.6328 =
d9%ce  
|e!Sm{#!  
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？ :wMZ&xERDZ  
wI)W:mUZZ  
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