[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 FMY r6/I  
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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 V'c9DoSRI\  
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图片:2.jpg

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然后运行分析的结果如下： \|R`wFn^P  
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Analysis of Tolerances @SPmb o  
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File : E:\光学设计资料\zemax练习\f500.ZMX 6`NsX  
Title: BdUhFN*  
Date : TUE JUN 21 2011 ig; ~ T  
R.A}tV=j#  
Units are Millimeters. 0'^? m$  
All changes are computed using linear differences. 9^0 'VRG  
.)|jBC8|}  
Paraxial Focus compensation only. *bn9j>|iv  
h1fJ`WT6,  
WARNING: Solves should be removed prior to tolerancing. %'\D_W&  
|:!#kA  
Mnemonics: \#tr4g~u  
TFRN: Tolerance on curvature in fringes. #Vul#JHW  
TTHI: Tolerance on thickness. :L:;~tK  
TSDX: Tolerance on surface decentering in x. 1>a^Q  
TSDY: Tolerance on surface decentering in y. Uvf-h4^J]:  
TSTX: Tolerance on surface tilt in x (degrees). C'n 9n!hR  
TSTY: Tolerance on surface tilt in y (degrees). 3I:DL#f  
TIRR: Tolerance on irregularity (fringes). TW3
:Y\p  
TIND: Tolerance on Nd index of refraction. <n }=zu  
TEDX: Tolerance on element decentering in x. n$`Nx\v  
TEDY: Tolerance on element decentering in y. HLYM(Pz  
TETX: Tolerance on element tilt in x (degrees). \Zoo9Wy  
TETY: Tolerance on element tilt in y (degrees). NXeo&+F  
SKLQAE5  
WARNING: RAY AIMING IS OFF. Very loose tolerances may not be computed accurately. ZI}m~7  
5`x9+XvoN  
WARNING: Boundary constraints on compensators will be ignored. iCAd7=o  
b@1QE  
Criterion           : Geometric MTF average S&T at 30.0000 cycles per mm dUb(C1h  
Mode                : Sensitivities 6ap,XFRMh  
Sampling            : 2 Z|8f7@k{|+  
Nominal Criterion   : 0.54403234 \vQ_:-A  
Test Wavelength     : 0.6328 lS?f?n^  
= 1}-]ctVn  
/f%u_ 8pV%  
Fields: XY Symmetric Angle in degrees `R:<(:  
#      X-Field      Y-Field       Weight    VDX    VDY    VCX    VCY W:rzfO.`Z  
1   0.000E+000   0.000E+000   1.000E+000  0.000  0.000  0.000  0.000 NPB':r-8  
zztW7MG2lQ  
Sensitivity Analysis: "a,Tc2xk  
SI;G|uO;/  
                 |----------------- Minimum ----------------| |----------------- Maximum ----------------| lq.0?(  
Type                      Value      Criterion        Change          Value      Criterion        Change +\:I3nKs%  
Fringe tolerance on surface 1 G)<k5U4  
TFRN   1            -1.00000000     0.54257256    -0.00145977     1.00000000     0.54548607     0.00145374 tD4IwX  
Change in Focus                :      -0.000000                            0.000000 ,\=u(Y\I[  
Fringe tolerance on surface 2 }FM<uBKW  
TFRN   2            -1.00000000     0.54177471    -0.00225762     1.00000000     0.54627463     0.00224230 H>DJ-lG(  
Change in Focus                :       0.000000                            0.000000 u'32nf?  
Fringe tolerance on surface 3 nosEo?{  
TFRN   3            -1.00000000     0.54779866     0.00376632     1.00000000     0.54022572    -0.00380662 'Y vW|Iq  
Change in Focus                :      -0.000000                            0.000000 }U^9(  
Thickness tolerance on surface 1 ;U7\pc;S  
TTHI   1   3        -0.20000000     0.54321462    -0.00081772     0.20000000     0.54484759     0.00081525 k*!J,/=k  
Change in Focus                :       0.000000                            0.000000 B;K{V
o:C  
Thickness tolerance on surface 2 'HqAm$
V+  
TTHI   2   3        -0.20000000     0.54478712     0.00075478     0.20000000     0.54327558    -0.00075675 1H[lf B  
Change in Focus                :       0.000000                           -0.000000 erqm=)  
Decenter X tolerance on surfaces 1 through 3 Nc"h8p?  
TEDX   1   3        -0.20000000     0.54401464   -1.7700E-005     0.20000000     0.54401464   -1.7700E-005 eM9~&{m.  
Change in Focus                :       0.000000                            0.000000 yS3x))  
Decenter Y tolerance on surfaces 1 through 3 hM8G"b  
TEDY   1   3        -0.20000000     0.54401464   -1.7700E-005     0.20000000     0.54401464   -1.7700E-005 1:>RQPXcWv  
Change in Focus                :       0.000000                            0.000000 O'wN4qb=F  
Tilt X tolerance on surfaces 1 through 3 (degrees) e<C5}#wt  
TETX   1   3        -0.20000000     0.54897548     0.00494314     0.20000000     0.54897548     0.00494314 (c}0Sg  
Change in Focus                :       0.000000                            0.000000 8F[j}.8q  
Tilt Y tolerance on surfaces 1 through 3 (degrees) hD$U8~zK  
TETY   1   3        -0.20000000     0.54897548     0.00494314     0.20000000     0.54897548     0.00494314 T8KhmO  
Change in Focus                :       0.000000                            0.000000 hh8UKEM
-  
Decenter X tolerance on surface 1 p}Gk|Kjlq,  
TSDX   1            -0.20000000     0.53999563    -0.00403671     0.20000000     0.53999563    -0.00403671 hCo&SRC/5  
Change in Focus                :       0.000000                            0.000000 -d[x09  
Decenter Y tolerance on surface 1 a"EQldm|d  
TSDY   1            -0.20000000     0.53999563    -0.00403671     0.20000000     0.53999563    -0.00403671 uY;/3?k&  
Change in Focus                :       0.000000                            0.000000 C8t+-p  
Tilt X tolerance on surface (degrees) 1 4\$Ze0tv  
TSTX   1            -0.20000000     0.42678383    -0.11724851     0.20000000     0.42678383    -0.11724851 gai?LXM l}  
Change in Focus                :       0.000000                            0.000000 !tbRqW6v  
Tilt Y tolerance on surface (degrees) 1 g Sa,A  
TSTY   1            -0.20000000     0.42678383    -0.11724851     0.20000000     0.42678383    -0.11724851 }40/GWp<f  
Change in Focus                :       0.000000                            0.000000 Maxnk3n  
Decenter X tolerance on surface 2 >`NM?KP s  
TSDX   2            -0.20000000     0.51705427    -0.02697807     0.20000000     0.51705427    -0.02697807 .K7A!;  
Change in Focus                :       0.000000                            0.000000 h:GOcLYM@X  
Decenter Y tolerance on surface 2 1L9^N  
TSDY   2            -0.20000000     0.51705427    -0.02697807     0.20000000     0.51705427    -0.02697807 vj_oMmjKw  
Change in Focus                :       0.000000                            0.000000 c:$:j,i}  
Tilt X tolerance on surface (degrees) 2 r2<+ =INn  
TSTX   2            -0.20000000     0.35349910    -0.19053324     0.20000000     0.35349910    -0.19053324 ! \gRXP}  
Change in Focus                :       0.000000                            0.000000 Y^!40XjrD  
Tilt Y tolerance on surface (degrees) 2 nQP0<_S  
TSTY   2            -0.20000000     0.35349910    -0.19053324     0.20000000     0.35349910    -0.19053324 +(/Z=4;,[  
Change in Focus                :       0.000000                            0.000000 IB?A]oN1{  
Decenter X tolerance on surface 3 (la   
TSDX   3            -0.20000000     0.53419039    -0.00984195     0.20000000     0.53419039    -0.00984195 F9c2JBOM  
Change in Focus                :       0.000000                            0.000000 NV91{o(-7  
Decenter Y tolerance on surface 3 E8j9@BHU[r  
TSDY   3            -0.20000000     0.53419039    -0.00984195     0.20000000     0.53419039    -0.00984195
wM yPR_  
Change in Focus                :       0.000000                            0.000000 M"FAUqz`
 
Tilt X tolerance on surface (degrees) 3 P! 3$RO  
TSTX   3            -0.20000000     0.42861670    -0.11541563     0.20000000     0.42861670    -0.11541563 Pw7'6W1  
Change in Focus                :       0.000000                            0.000000 zHU#Jjc_b  
Tilt Y tolerance on surface (degrees) 3 + zrwz\  
TSTY   3            -0.20000000     0.42861670    -0.11541563     0.20000000     0.42861670    -0.11541563 |knP  
Change in Focus                :       0.000000                            0.000000 s<dD>SU  
Irregularity of surface 1 in fringes '^J/aV  
TIRR   1            -0.20000000     0.50973587    -0.03429647     0.20000000     0.57333868     0.02930634 :E^B~ OuL  
Change in Focus                :       0.000000                            0.000000 .ClCP?HG  
Irregularity of surface 2 in fringes (Q4_3<G+  
TIRR   2            -0.20000000     0.53400904    -0.01002330     0.20000000     0.55360281     0.00957047 p/5!a~1'xN  
Change in Focus                :       0.000000                            0.000000 {xykf7zp  
Irregularity of surface 3 in fringes I{AU,  
TIRR   3            -0.20000000     0.58078982     0.03675748     0.20000000     0.49904394    -0.04498840 ps[6)d)o  
Change in Focus                :       0.000000                            0.000000 M!hby31  
Index tolerance on surface 1 I/>IB  
TIND   1            -0.00100000     0.52606778    -0.01796456     0.00100000     0.56121811     0.01718578 <s2l*mc  
Change in Focus                :       0.000000                            0.000000 2lSM`cw  
Index tolerance on surface 2 Pz)QOrrG~  
TIND   2            -0.00100000     0.55639086     0.01235852     0.00100000     0.53126361    -0.01276872 mQvKreo~  
Change in Focus                :       0.000000                           -0.000000 |{jAMC0#  
EGDE4n5>I  
Worst offenders: :aqh8bv  
Type                      Value      Criterion        Change u}rot+)%  
TSTY   2            -0.20000000     0.35349910    -0.19053324 R] [M_ r  
TSTY   2             0.20000000     0.35349910    -0.19053324 [!q&r(-K  
TSTX   2            -0.20000000     0.35349910    -0.19053324 qB39\j  
TSTX   2             0.20000000     0.35349910    -0.19053324 b mm@oi  
TSTY   1            -0.20000000     0.42678383    -0.11724851 $`Xx5Ts7  
TSTY   1             0.20000000     0.42678383    -0.11724851 VoyH:  
TSTX   1            -0.20000000     0.42678383    -0.11724851 Y1'.m5E  
TSTX   1             0.20000000     0.42678383    -0.11724851 wW<"l"x,  
TSTY   3            -0.20000000     0.42861670    -0.11541563 #-Rz`Y<&  
TSTY   3             0.20000000     0.42861670    -0.11541563 d-<y'GYw  
)f!dG(\&#  
Estimated Performance Changes based upon Root-Sum-Square method: 6uXW`/lvX  
Nominal MTF                 :     0.54403234 IX*S:7S[  
Estimated change            :    -0.36299231 CU;nrd"  
Estimated MTF               :     0.18104003 r:5Ve&~  
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Compensator Statistics: w.Vynb  
Change in back focus: &v-V_.0(H  
Minimum            :        -0.000000 F=om^6G%X5  
Maximum            :         0.000000 >YBpB,WND  
Mean               :        -0.000000 Z :9VxZ  
Standard Deviation :         0.000000 by U\I5  
_tReZ(Vw  
Monte Carlo Analysis: oGVSy`ku  
Number of trials: 20
$.N~AA~0  
1a$V{Eag  
Initial Statistics: Normal Distribution huoKr  
q-G|@6O  
  Trial       Criterion        Change 8$v7
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      1     0.42804416    -0.11598818 ye|a#a9N  
Change in Focus                :      -0.400171 h*KHEg"+  
      2     0.54384387    -0.00018847 yUW&Wgc=:  
Change in Focus                :       1.018470 JZ%F  
      3     0.44510003    -0.09893230 |3,V%>z  
Change in Focus                :      -0.601922 6XAr8mw9  
      4     0.18154684    -0.36248550 P082.:q"  
Change in Focus                :       0.920681 xNm3
2~  
      5     0.28665820    -0.25737414 j?f <hQ  
Change in Focus                :       1.253875 0#[f2X62B  
      6     0.21263372    -0.33139862 yOK])&c  
Change in Focus                :      -0.903878 Z
&w^9;30P  
      7     0.40051424    -0.14351809 p}A4K#G  
Change in Focus                :      -1.354815 M91lV(Z   
      8     0.48754161    -0.05649072 unnx#e]  
Change in Focus                :       0.215922 Hm VTfH'  
      9     0.40357468    -0.14045766 ]kkBgjQbS  
Change in Focus                :       0.281783 2]3HX3  
     10     0.26315315    -0.28087919 n+qVT4o  
Change in Focus                :      -1.048393 S%X\,N  
     11     0.26120585    -0.28282649 5; PXF  
Change in Focus                :       1.017611 WQ}!]$<"y  
     12     0.24033815    -0.30369419 _Hu2[lV  
Change in Focus                :      -0.109292 #a |ch6B  
     13     0.37164046    -0.17239188 bfJ`}xl
(8  
Change in Focus                :      -0.692430 q83~j`ZJ$  
     14     0.48597489    -0.05805744
NceB'YG|  
Change in Focus                :      -0.662040 X^D9)kel  
     15     0.21462327    -0.32940907 Dsj|~J3  
Change in Focus                :       1.611296 [u9JL3  
     16     0.43378226    -0.11025008 2ly,l[p8  
Change in Focus                :      -0.640081 bkwa{V  
     17     0.39321881    -0.15081353
BO4 K#H7  
Change in Focus                :       0.914906 @qPyrgy  
     18     0.20692530    -0.33710703 'n[+r}3  
Change in Focus                :       0.801607 8F^,8kIR  
     19     0.51374068    -0.03029165 uR;-eK  
Change in Focus                :       0.947293 ~$4.Mf,u  
     20     0.38013374    -0.16389860 em1cc,  
Change in Focus                :       0.667010 U>_IYT  
l^!A
 
Number of traceable Monte Carlo files generated: 20 i6md fp|k  
?JgO-.  
Nominal     0.54403234 aw/7Z`
 
Best        0.54384387    Trial     2 "Ug/ ',jkV  
Worst       0.18154684    Trial     4 VS9]po>=  
Mean        0.35770970 x$n~f:1Y  
Std Dev     0.11156454 }@14E-N=  
>HPvgR/#BY  
[2'm`tZL  
Compensator Statistics: Hs%QEvZl  
Change in back focus: g. ?*F#2  
Minimum            :        -1.354815 xIQ/$[&v  
Maximum            :         1.611296 2]D$|M?$~  
Mean               :         0.161872 xegQR
c  
Standard Deviation :         0.869664 bEBBwv  
*IWFeu
7y  
90% >       0.20977951               QtY hg$K3  
80% >       0.22748071               0\'Q&oTo  
50% >       0.38667627               q#99iiG1  
20% >       0.46553746               -XVEV  
10% >       0.50064115                wb6L?t  
@VC .>  
End of Run. ,\lYPx\P[  
VW9>xVd4  
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 a|QE *s.  

图片:3.JPG

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kS+r"e .TM  
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 _ktK+8*6`  
Tr8AG>  
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                 >~I#JQ%  
80% >       0.22748071                 eV"!/A2:N5  
50% >       0.38667627                 <9P4}`%)3  
20% >       0.46553746                 5Sr4-F+@%  
10% >       0.50064115 D.'h?^kA  
25 CZmsg  
最后这个数值是MTF值呢，还是MTF的公差？ XJqTmj3   
g;pR^D'M5C  
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？？？   !^m%O0DT  
CuH2E>wz  
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  : &$'z  
90% >       0.20977951                 g:7,~}_}^  
80% >       0.22748071                 ZE?f!ifp  
50% >       0.38667627                 UH? p]4Nz  
20% >       0.46553746                 L[g0&b%%-  
10% >       0.50064115 ]}Z4P-"t  
....... b&#DnZcf  

'm3t|:nMU  
/P:.qtT(  
这些数值都是MTF值

Criterion           : Geometric MTF average S&T at 30.0000 cycles per mm  
aAE>)#f(  
Mode                : Sensitivities ^T5X)Nu{=C  
Sampling            : 2 r%@Lej5+  
Nominal Criterion   : 0.54403234 m8R9{LC  
Test Wavelength     : 0.6328 ritBU:6  
3S*AxAeg  
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？ v+7kU=  
ldha|s.*  
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