[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 8z|]{XW{  
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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 OU/3U(%n]e  
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图片:2.jpg

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然后运行分析的结果如下： sAA;d  
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Analysis of Tolerances |'o<w ]hc  
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File : E:\光学设计资料\zemax练习\f500.ZMX @o}J)  
Title: E.N>,N  
Date : TUE JUN 21 2011 ub1~+T'O
 
J?t(TW6E  
Units are Millimeters. D8B\F5..c#  
All changes are computed using linear differences. ; %AgKgV  
c;t3I},  
Paraxial Focus compensation only. RxV " ,  
/18fpH|  
WARNING: Solves should be removed prior to tolerancing. &{wRBl#  
=<#++;!I  
Mnemonics: .!2 u#A  
TFRN: Tolerance on curvature in fringes. I:al
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TTHI: Tolerance on thickness. X?u=R)uG  
TSDX: Tolerance on surface decentering in x. *>EV4Hl  
TSDY: Tolerance on surface decentering in y. wUg=jnY  
TSTX: Tolerance on surface tilt in x (degrees). e8_EB/)_Z  
TSTY: Tolerance on surface tilt in y (degrees). I3Z\]BI  
TIRR: Tolerance on irregularity (fringes). i-WP#\s  
TIND: Tolerance on Nd index of refraction. 8{icY|:MTN  
TEDX: Tolerance on element decentering in x. 0[uOKFgE  
TEDY: Tolerance on element decentering in y. 6&LmR75C  
TETX: Tolerance on element tilt in x (degrees). 48;b  
TETY: Tolerance on element tilt in y (degrees). f/.f08  
DtS7)/<T  
WARNING: RAY AIMING IS OFF. Very loose tolerances may not be computed accurately. 4}0YLwgJ  
8U]mr+  
WARNING: Boundary constraints on compensators will be ignored. 6>&(OV  
PRyzvc~  
Criterion           : Geometric MTF average S&T at 30.0000 cycles per mm UT 7'-  
Mode                : Sensitivities e!w{ap8u  
Sampling            : 2 vkYiO]y  
Nominal Criterion   : 0.54403234 3:sx%Ci/2  
Test Wavelength     : 0.6328 5YI6$ZdQ  
7''iT{-[p  
\7o7~pll  
Fields: XY Symmetric Angle in degrees <ZO+e*4  
#      X-Field      Y-Field       Weight    VDX    VDY    VCX    VCY vy-(:aH7U  
1   0.000E+000   0.000E+000   1.000E+000  0.000  0.000  0.000  0.000 X}QcXc.d  
)*.rl  
Sensitivity Analysis: WkpHe  
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                 |----------------- Minimum ----------------| |----------------- Maximum ----------------| 7a/ BS(kq<  
Type                      Value      Criterion        Change          Value      Criterion        Change i_!$bk<yo  
Fringe tolerance on surface 1 Gt,VSpb~s  
TFRN   1            -1.00000000     0.54257256    -0.00145977     1.00000000     0.54548607     0.00145374 ]_L;AD  
Change in Focus                :      -0.000000                            0.000000  Cz&t*i/  
Fringe tolerance on surface 2 F,mStw:  
TFRN   2            -1.00000000     0.54177471    -0.00225762     1.00000000     0.54627463     0.00224230 k0b6X5  
Change in Focus                :       0.000000                            0.000000 p~(STHDe#  
Fringe tolerance on surface 3 iK5[P  
TFRN   3            -1.00000000     0.54779866     0.00376632     1.00000000     0.54022572    -0.00380662 S,Qa\\~z  
Change in Focus                :      -0.000000                            0.000000 OSJj^Y)W|  
Thickness tolerance on surface 1 X VH(zJ  
TTHI   1   3        -0.20000000     0.54321462    -0.00081772     0.20000000     0.54484759     0.00081525 {?cF2K#  
Change in Focus                :       0.000000                            0.000000 h]Gvt 5  
Thickness tolerance on surface 2 -0k{O@l"  
TTHI   2   3        -0.20000000     0.54478712     0.00075478     0.20000000     0.54327558    -0.00075675 %bG\  
Change in Focus                :       0.000000                           -0.000000 ?l|&JgJ$  
Decenter X tolerance on surfaces 1 through 3 Xoq
-  
TEDX   1   3        -0.20000000     0.54401464   -1.7700E-005     0.20000000     0.54401464   -1.7700E-005 nF,zWr[x  
Change in Focus                :       0.000000                            0.000000 9m"EY@-  
Decenter Y tolerance on surfaces 1 through 3 }1a(*s,s-^  
TEDY   1   3        -0.20000000     0.54401464   -1.7700E-005     0.20000000     0.54401464   -1.7700E-005 i8*(J-M  
Change in Focus                :       0.000000                            0.000000 s,|v,,<+  
Tilt X tolerance on surfaces 1 through 3 (degrees) eG dFupfz  
TETX   1   3        -0.20000000     0.54897548     0.00494314     0.20000000     0.54897548     0.00494314 3"Kap/[h  
Change in Focus                :       0.000000                            0.000000 Cs vwc%  
Tilt Y tolerance on surfaces 1 through 3 (degrees) -2C^M> HZ  
TETY   1   3        -0.20000000     0.54897548     0.00494314     0.20000000     0.54897548     0.00494314 ?cK67|%W  
Change in Focus                :       0.000000                            0.000000 zCS }i_ p  
Decenter X tolerance on surface 1 G}dq ft5"  
TSDX   1            -0.20000000     0.53999563    -0.00403671     0.20000000     0.53999563    -0.00403671 #,
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Change in Focus                :       0.000000                            0.000000 3n_t^=  
Decenter Y tolerance on surface 1 w H`GzB"  
TSDY   1            -0.20000000     0.53999563    -0.00403671     0.20000000     0.53999563    -0.00403671 ?|Wxqo  
Change in Focus                :       0.000000                            0.000000 6jov8GIAt  
Tilt X tolerance on surface (degrees) 1 ZxCXru1  
TSTX   1            -0.20000000     0.42678383    -0.11724851     0.20000000     0.42678383    -0.11724851 oy=ej+:  
Change in Focus                :       0.000000                            0.000000 3]&le[.  
Tilt Y tolerance on surface (degrees) 1 F}B2nL&  
TSTY   1            -0.20000000     0.42678383    -0.11724851     0.20000000     0.42678383    -0.11724851 Q:ql~qew  
Change in Focus                :       0.000000                            0.000000 W:8{}Iu<  
Decenter X tolerance on surface 2 L5wFbc"u  
TSDX   2            -0.20000000     0.51705427    -0.02697807     0.20000000     0.51705427    -0.02697807 s`]SK^j0  
Change in Focus                :       0.000000                            0.000000 vXak5iq>X  
Decenter Y tolerance on surface 2 _?Ly7*UML  
TSDY   2            -0.20000000     0.51705427    -0.02697807     0.20000000     0.51705427    -0.02697807 Yic4|N?u  
Change in Focus                :       0.000000                            0.000000 =,s5>2  
Tilt X tolerance on surface (degrees) 2 u3jLe=Y'\  
TSTX   2            -0.20000000     0.35349910    -0.19053324     0.20000000     0.35349910    -0.19053324 K@"B^f0mU  
Change in Focus                :       0.000000                            0.000000 qzu(4*Gk6  
Tilt Y tolerance on surface (degrees) 2 O4^' H}*  
TSTY   2            -0.20000000     0.35349910    -0.19053324     0.20000000     0.35349910    -0.19053324 [E9_ZdBT  
Change in Focus                :       0.000000                            0.000000 0^d<@\  
Decenter X tolerance on surface 3 (|tR>R.Wxg  
TSDX   3            -0.20000000     0.53419039    -0.00984195     0.20000000     0.53419039    -0.00984195 <yw=+hz[u  
Change in Focus                :       0.000000                            0.000000 M'NOM>8  
Decenter Y tolerance on surface 3 E7<l^/<2S+  
TSDY   3            -0.20000000     0.53419039    -0.00984195     0.20000000     0.53419039    -0.00984195 ndvt $*  
Change in Focus                :       0.000000                            0.000000 8K\S]SZ  
Tilt X tolerance on surface (degrees) 3 _akpW  
TSTX   3            -0.20000000     0.42861670    -0.11541563     0.20000000     0.42861670    -0.11541563 ^>y|{;`  
Change in Focus                :       0.000000                            0.000000 "2"2qZ*h}  
Tilt Y tolerance on surface (degrees) 3 @~i :8  
TSTY   3            -0.20000000     0.42861670    -0.11541563     0.20000000     0.42861670    -0.11541563 Ou|kb61zg  
Change in Focus                :       0.000000                            0.000000 6x16?x  
Irregularity of surface 1 in fringes v\=k[oOu  
TIRR   1            -0.20000000     0.50973587    -0.03429647     0.20000000     0.57333868     0.02930634 :vE\r#hJ"  
Change in Focus                :       0.000000                            0.000000 
:4Y5  
Irregularity of surface 2 in fringes Saks~m7,  
TIRR   2            -0.20000000     0.53400904    -0.01002330     0.20000000     0.55360281     0.00957047 @|d`n\%x  
Change in Focus                :       0.000000                            0.000000 kr44@!s+'  
Irregularity of surface 3 in fringes ]];LA!
n  
TIRR   3            -0.20000000     0.58078982     0.03675748     0.20000000     0.49904394    -0.04498840 }e>OmfxDBt  
Change in Focus                :       0.000000                            0.000000 *M6j)jqV  
Index tolerance on surface 1 U6YQ*%mZ_  
TIND   1            -0.00100000     0.52606778    -0.01796456     0.00100000     0.56121811     0.01718578 [q|8.>sB  
Change in Focus                :       0.000000                            0.000000
~#=70  
Index tolerance on surface 2 c$;Cpt@-j  
TIND   2            -0.00100000     0.55639086     0.01235852     0.00100000     0.53126361    -0.01276872 ]-w.x
]I  
Change in Focus                :       0.000000                           -0.000000 @M(+YCi:e@  
PJ)d5D%T  
Worst offenders: c <X( S  
Type                      Value      Criterion        Change ERfSJ  
TSTY   2            -0.20000000     0.35349910    -0.19053324 5^
N`
~  
TSTY   2             0.20000000     0.35349910    -0.19053324 ?oU5H  
TSTX   2            -0.20000000     0.35349910    -0.19053324 .ITTYQHv)  
TSTX   2             0.20000000     0.35349910    -0.19053324 ]OC?
g2&6  
TSTY   1            -0.20000000     0.42678383    -0.11724851 L,sXJ23.  
TSTY   1             0.20000000     0.42678383    -0.11724851 aBKJd  
TSTX   1            -0.20000000     0.42678383    -0.11724851 ?|GwuG8g  
TSTX   1             0.20000000     0.42678383    -0.11724851 I%mGb$Q  
TSTY   3            -0.20000000     0.42861670    -0.11541563 @CA{uP;  
TSTY   3             0.20000000     0.42861670    -0.11541563 6PLdzZ{  
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Estimated Performance Changes based upon Root-Sum-Square method: Lv-
M.  
Nominal MTF                 :     0.54403234 6^z):d#u  
Estimated change            :    -0.36299231 N1dM,H  
Estimated MTF               :     0.18104003 Aj"fkY|Q  
KN.WTaO  
Compensator Statistics: m3`J9f,c/  
Change in back focus: dF+:9iiAm  
Minimum            :        -0.000000 t<SCrLbz  
Maximum            :         0.000000 w#>CYP`0k6  
Mean               :        -0.000000 )yS S2  
Standard Deviation :         0.000000 2))pB/  
is{H
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Monte Carlo Analysis: bG]?AiWr  
Number of trials: 20 `Oe}OSxnT  
I:] Pd  
Initial Statistics: Normal Distribution &[[Hfs2:-]  
W'5c%SI  
  Trial       Criterion        Change O?Qi  
      1     0.42804416    -0.11598818 ^{64b  
Change in Focus                :      -0.400171 5Qxm\?0J
  
      2     0.54384387    -0.00018847 1sXVuto  
Change in Focus                :       1.018470 lkb,UL;V  
      3     0.44510003    -0.09893230 8q|T`ac+N  
Change in Focus                :      -0.601922 s 5F?m  
      4     0.18154684    -0.36248550 X>eFGCz}I  
Change in Focus                :       0.920681 g`41d  
      5     0.28665820    -0.25737414  SB^xq  
Change in Focus                :       1.253875 K^c%$n:}+  
      6     0.21263372    -0.33139862 Q\z9\mMG-  
Change in Focus                :      -0.903878 =u.hHkx  
      7     0.40051424    -0.14351809 
UQJ  
Change in Focus                :      -1.354815 P?<G:]W  
      8     0.48754161    -0.05649072 d-B,)$zE  
Change in Focus                :       0.215922 y~py+:_  
      9     0.40357468    -0.14045766 {BD G;e  
Change in Focus                :       0.281783 #$,b )Uy  
     10     0.26315315    -0.28087919 77%I%<#  
Change in Focus                :      -1.048393 t0)XdIl8  
     11     0.26120585    -0.28282649 D3C3_ @*  
Change in Focus                :       1.017611  $kY ]HI  
     12     0.24033815    -0.30369419 6f;20dn6  
Change in Focus                :      -0.109292 ]U.*KkQ  
     13     0.37164046    -0.17239188 uVzvUz{b  
Change in Focus                :      -0.692430 a7TvX{<d  
     14     0.48597489    -0.05805744 'A'[N :i  
Change in Focus                :      -0.662040 ?PU7xO;_  
     15     0.21462327    -0.32940907 *^p^tK  
Change in Focus                :       1.611296 GNoUn7Y  
     16     0.43378226    -0.11025008 Gg5+Ap D  
Change in Focus                :      -0.640081 2:;;  
     17     0.39321881    -0.15081353 v=E(U4v9e  
Change in Focus                :       0.914906 7~nuFJaTI  
     18     0.20692530    -0.33710703 otdm rw|  
Change in Focus                :       0.801607 C]ef `5NR]  
     19     0.51374068    -0.03029165 ulN
Mqz\.  
Change in Focus                :       0.947293 4&G #Bi  
     20     0.38013374    -0.16389860 r!/<%\S  
Change in Focus                :       0.667010 Ko %e#q-  
?l^NKbw  
Number of traceable Monte Carlo files generated: 20 K8fC>iNbH  
noO#o+ Jg#  
Nominal     0.54403234 '_FxxLAO  
Best        0.54384387    Trial     2 J(Zz^$8]<?  
Worst       0.18154684    Trial     4 $[+)N~  
Mean        0.35770970 p4z thdN[  
Std Dev     0.11156454 iB5'mb*
 
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vg*~t3{L  
Compensator Statistics: @ [%K D  
Change in back focus: *fQn!2}=(  
Minimum            :        -1.354815 6K5mMu#4  
Maximum            :         1.611296 M,oRi;V  
Mean               :         0.161872 FR6PY  
Standard Deviation :         0.869664 O@`KGZEPY  
j-7aJj%  
90% >       0.20977951               aJ J63aJ  
80% >       0.22748071               {Hzj(c~S?  
50% >       0.38667627               $dF$-y<[0  
20% >       0.46553746              
SL?YU(a  
10% >       0.50064115                P}"uC`036  
c2:oM<6|  
End of Run. ma@!"Z8S  
!>EK %
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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 FM<`\d'  

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 __`6 W1  
}N"YlGY\Yn  
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                 |v_ttJ;+Y  
80% >       0.22748071                 0U?(EJ  
50% >       0.38667627                
n_kE  
20% >       0.46553746                 L9d|7.b  
10% >       0.50064115 A+(+PfU  
=ba1::18  
最后这个数值是MTF值呢，还是MTF的公差？ mQ2=t%  
12tk$FcY8*  
也就是说，这到底是有90%的产品MTF大于0.20977951还是90%的产品的MTF变化量大于0.20977951？？？   l YpoS  
gi$'x^]#  
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  : 7spZe"  
90% >       0.20977951                 3#y`6e=5  
80% >       0.22748071                 &P"13]^@  
50% >       0.38667627                 u"m TS&  
20% >       0.46553746                 Z[>fFg~N4  
10% >       0.50064115 I'[;E.KU  
....... i)$ySlEh  

HE>V\+ AL  
_9q byhS7  
这些数值都是MTF值

Criterion           : Geometric MTF average S&T at 30.0000 cycles per mm   ^Cvt^cI  
Mode                : Sensitivities _>;{+XRX[  
Sampling            : 2 Z4E6J'B8  
Nominal Criterion   : 0.54403234 1hzf+*g  
Test Wavelength     : 0.6328 T Qx<lw  
?*ZQ:jH  
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？ '=xO?2U-Z  
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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