[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 r!/=Iy@  
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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 G2#={g{  
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图片:2.jpg

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然后运行分析的结果如下： 1.7tXjRd+  
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Analysis of Tolerances <b0;Nf   
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File : E:\光学设计资料\zemax练习\f500.ZMX 3GEI)!  
Title: 7^Y"K  
Date : TUE JUN 21 2011 =-#>NlB$w  
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Units are Millimeters. $umh&z/  
All changes are computed using linear differences. !<!5;f8  
sZ`C "1cX  
Paraxial Focus compensation only. J23Tst#s  
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WARNING: Solves should be removed prior to tolerancing. :f^=~#!  
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Mnemonics: tb;!2$  
TFRN: Tolerance on curvature in fringes. U1pL `P1  
TTHI: Tolerance on thickness. .+1.??8:+  
TSDX: Tolerance on surface decentering in x. //C3
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TSDY: Tolerance on surface decentering in y. R"Q=U}?$  
TSTX: Tolerance on surface tilt in x (degrees). SrMg=a  
TSTY: Tolerance on surface tilt in y (degrees). bzFwQi}>  
TIRR: Tolerance on irregularity (fringes). 3QL I|VpO  
TIND: Tolerance on Nd index of refraction. )6?(K"T  
TEDX: Tolerance on element decentering in x. O 0Fw!IQk  
TEDY: Tolerance on element decentering in y. -phwzR\(t  
TETX: Tolerance on element tilt in x (degrees). "#uXpCuw  
TETY: Tolerance on element tilt in y (degrees). HCP'V  
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WARNING: RAY AIMING IS OFF. Very loose tolerances may not be computed accurately. b&k !DeE  
7CfHL;+m<4  
WARNING: Boundary constraints on compensators will be ignored. %T:~N<8)  
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Criterion           : Geometric MTF average S&T at 30.0000 cycles per mm Gc=#  
Mode                : Sensitivities c"X`OB  
Sampling            : 2 N?`-$C ]  
Nominal Criterion   : 0.54403234 [a~|{~?8  
Test Wavelength     : 0.6328 cx?XJ)  
8 VMe#41  
K07b#`NF6  
Fields: XY Symmetric Angle in degrees N*.JQvbnr  
#      X-Field      Y-Field       Weight    VDX    VDY    VCX    VCY <"I#lib  
1   0.000E+000   0.000E+000   1.000E+000  0.000  0.000  0.000  0.000 0pP;[7k\  

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Sensitivity Analysis: `TNWLD@Z  
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                 |----------------- Minimum ----------------| |----------------- Maximum ----------------| =,B
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Type                      Value      Criterion        Change          Value      Criterion        Change P$E#C:=  
Fringe tolerance on surface 1 Wi3:;`>G<p  
TFRN   1            -1.00000000     0.54257256    -0.00145977     1.00000000     0.54548607     0.00145374 >;Er[Rywr  
Change in Focus                :      -0.000000                            0.000000 0)/L+P5  
Fringe tolerance on surface 2 (8C ,"Dc[0  
TFRN   2            -1.00000000     0.54177471    -0.00225762     1.00000000     0.54627463     0.00224230 \$o5$/oU(  
Change in Focus                :       0.000000                            0.000000 :BLD&mb"Y  
Fringe tolerance on surface 3 ?3ldHWa  
TFRN   3            -1.00000000     0.54779866     0.00376632     1.00000000     0.54022572    -0.00380662 wfH#E2+pk  
Change in Focus                :      -0.000000                            0.000000 {(r`
&[  
Thickness tolerance on surface 1 +o]DT7W  
TTHI   1   3        -0.20000000     0.54321462    -0.00081772     0.20000000     0.54484759     0.00081525 3DH} YAUU  
Change in Focus                :       0.000000                            0.000000 $5XE'm  
Thickness tolerance on surface 2 OZ2gIK  
TTHI   2   3        -0.20000000     0.54478712     0.00075478     0.20000000     0.54327558    -0.00075675 m Cvgs  
Change in Focus                :       0.000000                           -0.000000 -nP y?>p"|  
Decenter X tolerance on surfaces 1 through 3 }^).Y7{g[  
TEDX   1   3        -0.20000000     0.54401464   -1.7700E-005     0.20000000     0.54401464   -1.7700E-005 9&R. <I  
Change in Focus                :       0.000000                            0.000000 feOX
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Decenter Y tolerance on surfaces 1 through 3 Q/EHvb]  
TEDY   1   3        -0.20000000     0.54401464   -1.7700E-005     0.20000000     0.54401464   -1.7700E-005 #'}?.m  
Change in Focus                :       0.000000                            0.000000 2y/|/IW=  
Tilt X tolerance on surfaces 1 through 3 (degrees) aw z(W>  
TETX   1   3        -0.20000000     0.54897548     0.00494314     0.20000000     0.54897548     0.00494314 i v7^!  
Change in Focus                :       0.000000                            0.000000 }G,PUjg_^3  
Tilt Y tolerance on surfaces 1 through 3 (degrees) &S/@i|_  
TETY   1   3        -0.20000000     0.54897548     0.00494314     0.20000000     0.54897548     0.00494314 906b=  
Change in Focus                :       0.000000                            0.000000 `Paz   
Decenter X tolerance on surface 1 jqULg iC  
TSDX   1            -0.20000000     0.53999563    -0.00403671     0.20000000     0.53999563    -0.00403671 sTx23RJ9  
Change in Focus                :       0.000000                            0.000000 R"NR-iU  
Decenter Y tolerance on surface 1 kWVaHZr  
TSDY   1            -0.20000000     0.53999563    -0.00403671     0.20000000     0.53999563    -0.00403671 .!yXto:  
Change in Focus                :       0.000000                            0.000000 K.k%Tg[ ~  
Tilt X tolerance on surface (degrees) 1 Bf37/kkf(  
TSTX   1            -0.20000000     0.42678383    -0.11724851     0.20000000     0.42678383    -0.11724851 6CoDn(+z  
Change in Focus                :       0.000000                            0.000000 SJ(<u2J]  
Tilt Y tolerance on surface (degrees) 1 :\I88 -N@'  
TSTY   1            -0.20000000     0.42678383    -0.11724851     0.20000000     0.42678383    -0.11724851 N#(p_7M  
Change in Focus                :       0.000000                            0.000000 y\M]\^[7  
Decenter X tolerance on surface 2 )erI3?k  
TSDX   2            -0.20000000     0.51705427    -0.02697807     0.20000000     0.51705427    -0.02697807 49vKb(bz{  
Change in Focus                :       0.000000                            0.000000 M`6rI  
Decenter Y tolerance on surface 2 B(+J?0Dj  
TSDY   2            -0.20000000     0.51705427    -0.02697807     0.20000000     0.51705427    -0.02697807 ] B ZSW  
Change in Focus                :       0.000000                            0.000000 ^Ec);Z  
Tilt X tolerance on surface (degrees) 2 +6dq+8msF  
TSTX   2            -0.20000000     0.35349910    -0.19053324     0.20000000     0.35349910    -0.19053324 0s>ozAJ  
Change in Focus                :       0.000000                            0.000000 D?yiK=:08`  
Tilt Y tolerance on surface (degrees) 2 UVND1XV^f  
TSTY   2            -0.20000000     0.35349910    -0.19053324     0.20000000     0.35349910    -0.19053324 =ELl86=CG  
Change in Focus                :       0.000000                            0.000000 -:mT8'.F-  
Decenter X tolerance on surface 3 WvV!F?uqZ  
TSDX   3            -0.20000000     0.53419039    -0.00984195     0.20000000     0.53419039    -0.00984195 -\ {.]KL  
Change in Focus                :       0.000000                            0.000000 A
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Decenter Y tolerance on surface 3 H{Fww4pn  
TSDY   3            -0.20000000     0.53419039    -0.00984195     0.20000000     0.53419039    -0.00984195 6Z2a5zO8  
Change in Focus                :       0.000000                            0.000000 b#ih=qE  
Tilt X tolerance on surface (degrees) 3 ;- ~}g7$  
TSTX   3            -0.20000000     0.42861670    -0.11541563     0.20000000     0.42861670    -0.11541563 vU
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Change in Focus                :       0.000000                            0.000000 h+,Eu7\88  
Tilt Y tolerance on surface (degrees) 3 *^|.bBG  
TSTY   3            -0.20000000     0.42861670    -0.11541563     0.20000000     0.42861670    -0.11541563 9fLxp$`(T  
Change in Focus                :       0.000000                            0.000000 z=YHRS  
Irregularity of surface 1 in fringes $^[^]Q  
TIRR   1            -0.20000000     0.50973587    -0.03429647     0.20000000     0.57333868     0.02930634 m-%.LDqM  
Change in Focus                :       0.000000                            0.000000 x6-bAf  
Irregularity of surface 2 in fringes %d3KE|&u  
TIRR   2            -0.20000000     0.53400904    -0.01002330     0.20000000     0.55360281     0.00957047 s/' ]* n  
Change in Focus                :       0.000000                            0.000000 ;"gUrcuY  
Irregularity of surface 3 in fringes ?<mxv"  
TIRR   3            -0.20000000     0.58078982     0.03675748     0.20000000     0.49904394    -0.04498840 )#|I(Gz ^  
Change in Focus                :       0.000000                            0.000000 t|/{oAj  
Index tolerance on surface 1 =a!w)z_rw  
TIND   1            -0.00100000     0.52606778    -0.01796456     0.00100000     0.56121811     0.01718578 Cp[{|U-?G  
Change in Focus                :       0.000000                            0.000000 9Tju+KcK  
Index tolerance on surface 2 E@uxEF  
TIND   2            -0.00100000     0.55639086     0.01235852     0.00100000     0.53126361    -0.01276872 _ML`Vh]  
Change in Focus                :       0.000000                           -0.000000 ix.I)  
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Worst offenders: aaa6R|>0  
Type                      Value      Criterion        Change _VvXE572  
TSTY   2            -0.20000000     0.35349910    -0.19053324 ,\2w+L5TD  
TSTY   2             0.20000000     0.35349910    -0.19053324 (g>8!Gl  
TSTX   2            -0.20000000     0.35349910    -0.19053324 'aLTiF+  
TSTX   2             0.20000000     0.35349910    -0.19053324 3rRN~$  
TSTY   1            -0.20000000     0.42678383    -0.11724851 D' d^rT| H  
TSTY   1             0.20000000     0.42678383    -0.11724851 $0(~ID  
TSTX   1            -0.20000000     0.42678383    -0.11724851 KG8:F].u(  
TSTX   1             0.20000000     0.42678383    -0.11724851 }{3
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TSTY   3            -0.20000000     0.42861670    -0.11541563 nqnVFkGd9  
TSTY   3             0.20000000     0.42861670    -0.11541563 SuorCp
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Estimated Performance Changes based upon Root-Sum-Square method: _s(izc  
Nominal MTF                 :     0.54403234 *=b#>//  
Estimated change            :    -0.36299231 %d%$jF`  
Estimated MTF               :     0.18104003 iS/faXe5  
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Compensator Statistics: `XmT)C  
Change in back focus: klUW_d-  
Minimum            :        -0.000000 L("zS%qr  
Maximum            :         0.000000
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Mean               :        -0.000000 ?WD JWp%  
Standard Deviation :         0.000000 f&ZFG>)6  

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Monte Carlo Analysis: ggP#2I\  
Number of trials: 20 A7e
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Initial Statistics: Normal Distribution G/y@`A)  
/kK%}L_D  
  Trial       Criterion        Change IN{ 1itE  
      1     0.42804416    -0.11598818 @+iO0?f  
Change in Focus                :      -0.400171 ..Dr?#Cr  
      2     0.54384387    -0.00018847 rhr(uCp/  
Change in Focus                :       1.018470 q-k~L\Ys  
      3     0.44510003    -0.09893230 Ok/U"N-  
Change in Focus                :      -0.601922 cVR#\OM  
      4     0.18154684    -0.36248550 JsDugn ,B  
Change in Focus                :       0.920681 \NgBF  
      5     0.28665820    -0.25737414 i wFI lJ@  
Change in Focus                :       1.253875 "3\C;B6I  
      6     0.21263372    -0.33139862 S8S<>W  
Change in Focus                :      -0.903878 Q,AM<\S  
      7     0.40051424    -0.14351809 7K.in3M(  
Change in Focus                :      -1.354815 C=y[WsT  
      8     0.48754161    -0.05649072 KeIk9T13O  
Change in Focus                :       0.215922 |o5F%1o  
      9     0.40357468    -0.14045766 q%rfKHMA50  
Change in Focus                :       0.281783 [Y%H8}  
     10     0.26315315    -0.28087919 [WAnII  
Change in Focus                :      -1.048393
Da@H^  
     11     0.26120585    -0.28282649 p,cw-lN  
Change in Focus                :       1.017611 }BR@vY'd  
     12     0.24033815    -0.30369419 {&qB!axj  
Change in Focus                :      -0.109292 Z2.S:y.  
     13     0.37164046    -0.17239188 ^o|Gx  
Change in Focus                :      -0.692430 \/ 9s<  
     14     0.48597489    -0.05805744 v})-:  
Change in Focus                :      -0.662040 Y*KHr`\C4  
     15     0.21462327    -0.32940907 h^`!kp  
Change in Focus                :       1.611296 S,'y L7s  
     16     0.43378226    -0.11025008 PrZs@ Y  
Change in Focus                :      -0.640081 L'KgB=5K&i  
     17     0.39321881    -0.15081353 QnJ(C]cW  
Change in Focus                :       0.914906 Fh3>y2`/  
     18     0.20692530    -0.33710703 [=otgVteN"  
Change in Focus                :       0.801607 #xlT,:_:)  
     19     0.51374068    -0.03029165 f(}AdW}?  
Change in Focus                :       0.947293 !K0:0:  
     20     0.38013374    -0.16389860 "j]85  
Change in Focus                :       0.667010 a2vZ'  
'T_Vm%\)  
Number of traceable Monte Carlo files generated: 20 3u tJlD  
2b`3"S  
Nominal     0.54403234 |+|q`SwJ  
Best        0.54384387    Trial     2 L6jD4ec8  
Worst       0.18154684    Trial     4 Pv>W`/*_,s  
Mean        0.35770970 [!Jd.zm  
Std Dev     0.11156454 qa!3lb_'M  
"j<l=l!  
$v
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Compensator Statistics: ":G\  
Change in back focus: )j^~=Sio.  
Minimum            :        -1.354815 ar#Xe;T!  
Maximum            :         1.611296 Alh"ZT^*  
Mean               :         0.161872 ! ,*4d $  
Standard Deviation :         0.869664 F79!B  
jI
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90% >       0.20977951               #*"5F*  
80% >       0.22748071               lls-Nir%  
50% >       0.38667627               ;hcOD4or  
20% >       0.46553746               o2J-&   
10% >       0.50064115                YgFmJ.1  
 oRbG6Vv/  
End of Run. <Y9 L3O`[  
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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 <691pkX  

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 , (Bo .(]  
eOdB<He36  
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                 ]rpU3 3  
80% >       0.22748071                 'DDlX3W-  
50% >       0.38667627                 Tf|?j=f  
20% >       0.46553746                 N3Yf3rK  
10% >       0.50064115 g$(<wWsU  
*j9hjq0j  
最后这个数值是MTF值呢，还是MTF的公差？ 3.c0PRZ  
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也就是说，这到底是有90%的产品MTF大于0.20977951还是90%的产品的MTF变化量大于0.20977951？？？   gE_i#=bw  
=.sg$VX  
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  : iEA$`LhO\A  
90% >       0.20977951                 [YGPcGw  
80% >       0.22748071                 6 aE:vR2  
50% >       0.38667627                 QM"\;l??  
20% >       0.46553746                 Mdj?;'Yv  
10% >       0.50064115 rzR=% >
 
....... 6;O fh  

TjUg8k  
XL`*Tbx  
这些数值都是MTF值

Criterion           : Geometric MTF average S&T at 30.0000 cycles per mm   lj U|9|v  
Mode                : Sensitivities ?4[IIX-  
Sampling            : 2 /K@_O\+;Q
 
Nominal Criterion   : 0.54403234 h^H~q<R[T  
Test Wavelength     : 0.6328 Ojh\H  
EJ%Kr$51K  
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？ hxXl0egI  
(3_m[N\F  
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