[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 Q1[EiM3  
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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 21 N!?DR  
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图片:2.jpg

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然后运行分析的结果如下： tqzr+  
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Analysis of Tolerances YWhp4`m  
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File : E:\光学设计资料\zemax练习\f500.ZMX Hk@LHC  
Title: ?$~5ti#\  
Date : TUE JUN 21 2011 + ;_0:+//  
*  \%b1  
Units are Millimeters. w 3$9  
All changes are computed using linear differences. A}G>JL  
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Paraxial Focus compensation only. a3C\?5  
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WARNING: Solves should be removed prior to tolerancing. yt#~n_  
"HtaJVp//  
Mnemonics: {C5-M!D{<  
TFRN: Tolerance on curvature in fringes. "Zu>cbE  
TTHI: Tolerance on thickness. tb;u%{S  
TSDX: Tolerance on surface decentering in x. 1-}M5]Y  
TSDY: Tolerance on surface decentering in y. O
7z5,-  
TSTX: Tolerance on surface tilt in x (degrees). )uC5  
TSTY: Tolerance on surface tilt in y (degrees). y;=/S?L
.:  
TIRR: Tolerance on irregularity (fringes). Y{OnW98  
TIND: Tolerance on Nd index of refraction. HiSNEp$-4$  
TEDX: Tolerance on element decentering in x. hFMT@Gy  
TEDY: Tolerance on element decentering in y. E{]PfUfFY  
TETX: Tolerance on element tilt in x (degrees). Jp-6]uW  
TETY: Tolerance on element tilt in y (degrees). BQL](Y"  
%s ">:  
WARNING: RAY AIMING IS OFF. Very loose tolerances may not be computed accurately. }TRVCF1  
?6//'bO:%  
WARNING: Boundary constraints on compensators will be ignored. z9JZV`dNgz  
zszx~LSvIT  
Criterion           : Geometric MTF average S&T at 30.0000 cycles per mm =O>E>Q  
Mode                : Sensitivities XvIY=~  
Sampling            : 2 qL~|bfN  
Nominal Criterion   : 0.54403234 TnJJ& "~3b  
Test Wavelength     : 0.6328 2q ~y\fe  
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=i>i,>bv  
Fields: XY Symmetric Angle in degrees EM!9_8 f  
#      X-Field      Y-Field       Weight    VDX    VDY    VCX    VCY +Sak_*fq  
1   0.000E+000   0.000E+000   1.000E+000  0.000  0.000  0.000  0.000 Yz? 8n  
\-CL}Z}S  
Sensitivity Analysis: F?XiP.`DR  
0N):8`dY  
                 |----------------- Minimum ----------------| |----------------- Maximum ----------------| o "1X8v  
Type                      Value      Criterion        Change          Value      Criterion        Change F.-:4m(Z  
Fringe tolerance on surface 1 B~2M/&rM\  
TFRN   1            -1.00000000     0.54257256    -0.00145977     1.00000000     0.54548607     0.00145374 5G l:jRu  
Change in Focus                :      -0.000000                            0.000000 r>g5_"FL  
Fringe tolerance on surface 2 0ni/!}YP_  
TFRN   2            -1.00000000     0.54177471    -0.00225762     1.00000000     0.54627463     0.00224230 KN".0WU  
Change in Focus                :       0.000000                            0.000000 nx
@,oC4  
Fringe tolerance on surface 3 <ToRPx&E  
TFRN   3            -1.00000000     0.54779866     0.00376632     1.00000000     0.54022572    -0.00380662 oW3|b2D  
Change in Focus                :      -0.000000                            0.000000 Dr5AJ`y9A  
Thickness tolerance on surface 1  =h|xlT  
TTHI   1   3        -0.20000000     0.54321462    -0.00081772     0.20000000     0.54484759     0.00081525 v0KJKrliGO  
Change in Focus                :       0.000000                            0.000000 lQ#='Jqfp  
Thickness tolerance on surface 2 Zw_'u=r >  
TTHI   2   3        -0.20000000     0.54478712     0.00075478     0.20000000     0.54327558    -0.00075675 d0;<Cw~Tl  
Change in Focus                :       0.000000                           -0.000000 v$#l]A_D  
Decenter X tolerance on surfaces 1 through 3 lH/7m;M  
TEDX   1   3        -0.20000000     0.54401464   -1.7700E-005     0.20000000     0.54401464   -1.7700E-005 - *v)sP"@  
Change in Focus                :       0.000000                            0.000000 G$VE o8Blb  
Decenter Y tolerance on surfaces 1 through 3 q``
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TEDY   1   3        -0.20000000     0.54401464   -1.7700E-005     0.20000000     0.54401464   -1.7700E-005 YRu#JYti  
Change in Focus                :       0.000000                            0.000000 P.- `[  
Tilt X tolerance on surfaces 1 through 3 (degrees) Q:8t1ZDo  
TETX   1   3        -0.20000000     0.54897548     0.00494314     0.20000000     0.54897548     0.00494314 WkDXWv\{,{  
Change in Focus                :       0.000000                            0.000000 dz1kQzOU*  
Tilt Y tolerance on surfaces 1 through 3 (degrees) 6mV^akapv  
TETY   1   3        -0.20000000     0.54897548     0.00494314     0.20000000     0.54897548     0.00494314 #3_ @aq*  
Change in Focus                :       0.000000                            0.000000 6UM1>xq9A  
Decenter X tolerance on surface 1 Pxf/*z  
TSDX   1            -0.20000000     0.53999563    -0.00403671     0.20000000     0.53999563    -0.00403671 q_Z6s5O  
Change in Focus                :       0.000000                            0.000000 f0 kz:sZ9  
Decenter Y tolerance on surface 1 75;g|+  
TSDY   1            -0.20000000     0.53999563    -0.00403671     0.20000000     0.53999563    -0.00403671 6 tl#AJ-  
Change in Focus                :       0.000000                            0.000000 dP=,<H#]m  
Tilt X tolerance on surface (degrees) 1 GQDW}b8  
TSTX   1            -0.20000000     0.42678383    -0.11724851     0.20000000     0.42678383    -0.11724851 sBLOrbo  
Change in Focus                :       0.000000                            0.000000 ;Q0H7)t:  
Tilt Y tolerance on surface (degrees) 1 RaOLy \  
TSTY   1            -0.20000000     0.42678383    -0.11724851     0.20000000     0.42678383    -0.11724851 wY"BPl]b  
Change in Focus                :       0.000000                            0.000000 7sU,<Z/D  
Decenter X tolerance on surface 2 @.L/HXu-P  
TSDX   2            -0.20000000     0.51705427    -0.02697807     0.20000000     0.51705427    -0.02697807 a"^rOiXR{  
Change in Focus                :       0.000000                            0.000000 #wp~lW9!s9  
Decenter Y tolerance on surface 2 Rp0^Gwa  
TSDY   2            -0.20000000     0.51705427    -0.02697807     0.20000000     0.51705427    -0.02697807 =3EjD;2  
Change in Focus                :       0.000000                            0.000000  rp=Y }  
Tilt X tolerance on surface (degrees) 2 v {)8QF]  
TSTX   2            -0.20000000     0.35349910    -0.19053324     0.20000000     0.35349910    -0.19053324 )j. .)o  
Change in Focus                :       0.000000                            0.000000 Bo8NY!  
Tilt Y tolerance on surface (degrees) 2 NRazI_Z  
TSTY   2            -0.20000000     0.35349910    -0.19053324     0.20000000     0.35349910    -0.19053324 K9ek  
Change in Focus                :       0.000000                            0.000000 hG>kx8h  
Decenter X tolerance on surface 3 X'j9l4Ph7  
TSDX   3            -0.20000000     0.53419039    -0.00984195     0.20000000     0.53419039    -0.00984195 myF/_o&Ty  
Change in Focus                :       0.000000                            0.000000 A45!hhf  
Decenter Y tolerance on surface 3 *d9RD~
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TSDY   3            -0.20000000     0.53419039    -0.00984195     0.20000000     0.53419039    -0.00984195 ~l]g4iEp  
Change in Focus                :       0.000000                            0.000000 G\K!7k`)!  
Tilt X tolerance on surface (degrees) 3 ]I\9S{?  
TSTX   3            -0.20000000     0.42861670    -0.11541563     0.20000000     0.42861670    -0.11541563 cp6I]#X  
Change in Focus                :       0.000000                            0.000000 d6)+d9?<  
Tilt Y tolerance on surface (degrees) 3 t\-|J SZ  
TSTY   3            -0.20000000     0.42861670    -0.11541563     0.20000000     0.42861670    -0.11541563 sfk;c#K  
Change in Focus                :       0.000000                            0.000000 9-!GYa'Z  
Irregularity of surface 1 in fringes bu{dT8g'U  
TIRR   1            -0.20000000     0.50973587    -0.03429647     0.20000000     0.57333868     0.02930634 9I(00t_  
Change in Focus                :       0.000000                            0.000000 ~SS3gLv  
Irregularity of surface 2 in fringes L~C:1VG5  
TIRR   2            -0.20000000     0.53400904    -0.01002330     0.20000000     0.55360281     0.00957047 iXL?ic  
Change in Focus                :       0.000000                            0.000000 ?C']R(fQ\  
Irregularity of surface 3 in fringes y-{?0mLq  
TIRR   3            -0.20000000     0.58078982     0.03675748     0.20000000     0.49904394    -0.04498840 ZS[Ut  
Change in Focus                :       0.000000                            0.000000 HSVl$66  
Index tolerance on surface 1 lIPz"  
TIND   1            -0.00100000     0.52606778    -0.01796456     0.00100000     0.56121811     0.01718578 7&u$^c S(  
Change in Focus                :       0.000000                            0.000000 k"6&&  
Index tolerance on surface 2 hii#kB2  
TIND   2            -0.00100000     0.55639086     0.01235852     0.00100000     0.53126361    -0.01276872 Hwcmt!y  
Change in Focus                :       0.000000                           -0.000000 :*s@L2D6  
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Worst offenders: z\$(@:{A  
Type                      Value      Criterion        Change )iFXa<5h  
TSTY   2            -0.20000000     0.35349910    -0.19053324 a'A<'(yv  
TSTY   2             0.20000000     0.35349910    -0.19053324 45&Rl,2  
TSTX   2            -0.20000000     0.35349910    -0.19053324 / }*}r  
TSTX   2             0.20000000     0.35349910    -0.19053324 sKk+^.K}|  
TSTY   1            -0.20000000     0.42678383    -0.11724851 ^PUB~P/  
TSTY   1             0.20000000     0.42678383    -0.11724851 _
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TSTX   1            -0.20000000     0.42678383    -0.11724851 j4u ["O3  
TSTX   1             0.20000000     0.42678383    -0.11724851 .y lv
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TSTY   3            -0.20000000     0.42861670    -0.11541563 $9@AwS@Uu  
TSTY   3             0.20000000     0.42861670    -0.11541563 mtdy@=?1Y  
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Estimated Performance Changes based upon Root-Sum-Square method: Jt0U`
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Nominal MTF                 :     0.54403234 '8[; m_S  
Estimated change            :    -0.36299231 L|B! ]}  
Estimated MTF               :     0.18104003 a ,"   
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Compensator Statistics: $Ggnn#  
Change in back focus: 1jO%\uR/  
Minimum            :        -0.000000 )?pnV":2Y  
Maximum            :         0.000000 6b9J3~d\E  
Mean               :        -0.000000 1}Y3|QxF  
Standard Deviation :         0.000000 *f_A:`:  
(][-()YV  
Monte Carlo Analysis: \0vs93>?  
Number of trials: 20 T#wG]DH;  
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Initial Statistics: Normal Distribution \>G}DGz  
"YWZ&_n**  
  Trial       Criterion        Change _3< P(w{  
      1     0.42804416    -0.11598818 $/|vbe,  
Change in Focus                :      -0.400171 E(vO^)#  
      2     0.54384387    -0.00018847 #Ge_3^'  
Change in Focus                :       1.018470 FBbaLqgVF{  
      3     0.44510003    -0.09893230 crN*eFeW  
Change in Focus                :      -0.601922 x,zYNNx5g  
      4     0.18154684    -0.36248550 H:XPl$;  
Change in Focus                :       0.920681 '#=0q  
      5     0.28665820    -0.25737414 &FuL{YL  
Change in Focus                :       1.253875 ;FW <%  
      6     0.21263372    -0.33139862 -*i_8`  
Change in Focus                :      -0.903878 (m6V)y  
      7     0.40051424    -0.14351809 o8|qT)O@U  
Change in Focus                :      -1.354815 ifu!6_b.  
      8     0.48754161    -0.05649072 dfKGO$}V  
Change in Focus                :       0.215922 vbd)L$$20+  
      9     0.40357468    -0.14045766 ;8dffsyq  
Change in Focus                :       0.281783 >^GV #z  
     10     0.26315315    -0.28087919 V)l:fUm2  
Change in Focus                :      -1.048393 JgA{1@h  
     11     0.26120585    -0.28282649 w%8y5v5  
Change in Focus                :       1.017611 @0]WMI9B"B  
     12     0.24033815    -0.30369419 AI Kz]J0;  
Change in Focus                :      -0.109292 9[;da  
     13     0.37164046    -0.17239188 p$qk\efv*4  
Change in Focus                :      -0.692430 >3@3~F%xAX  
     14     0.48597489    -0.05805744 J7^UQ  
Change in Focus                :      -0.662040 EmR82^_:  
     15     0.21462327    -0.32940907 :8hI3]9  
Change in Focus                :       1.611296 GZ,MC?W  
     16     0.43378226    -0.11025008 _> x}MW+  
Change in Focus                :      -0.640081 #o7)eKeQ  
     17     0.39321881    -0.15081353 Mgi~j.[  
Change in Focus                :       0.914906 d9BFeq8  
     18     0.20692530    -0.33710703 /t`\b [  
Change in Focus                :       0.801607 ;{L[1OP%e  
     19     0.51374068    -0.03029165 ?|+e*{4k  
Change in Focus                :       0.947293 Z\x
nPhV  
     20     0.38013374    -0.16389860 n6+h;+8;]  
Change in Focus                :       0.667010 Wbei{3~$Y"  
8V 4e\q  
Number of traceable Monte Carlo files generated: 20 /e|Lw4$@S  
d}':7Np  
Nominal     0.54403234 W/hzo*o'g  
Best        0.54384387    Trial     2 u}|v;:|j  
Worst       0.18154684    Trial     4 [DH4
iG5  
Mean        0.35770970 ;?tH8jf>  
Std Dev     0.11156454 {59>U~  
\Ta5c31S+  
Z,e|L4&  
Compensator Statistics: v/9ZTd  
Change in back focus: 4\u`MR  
Minimum            :        -1.354815 peBHZJ``RX  
Maximum            :         1.611296 $!MP0f\q g  
Mean               :         0.161872 Qn.dL@W  
Standard Deviation :         0.869664 7Q9Hk(Z9  
GDSXBa*7  
90% >       0.20977951               "nCK%w=  
80% >       0.22748071               *$BUow/>  
50% >       0.38667627               G}g;<,g~  
20% >       0.46553746               'ia-h7QWS  
10% >       0.50064115                GEF's#YWK  
Eu'E;*-f  
End of Run. 3*~`z9-z  
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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 O- QT+]  

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 ch]Q
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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                 \#]%S/_ A  
80% >       0.22748071                 8(Te^] v#  
50% >       0.38667627                 oQ r.cKD ?  
20% >       0.46553746                 r4/b~n+*  
10% >       0.50064115 ^6kl4:{idE  
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最后这个数值是MTF值呢，还是MTF的公差？ 36(qe"s  
2~f*o^%l  
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？？？   hzr, %r  
#rX^)2  
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  : {f4jE#a
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90% >       0.20977951                 [^a7l$fmi  
80% >       0.22748071                 Mj>QV(L8t  
50% >       0.38667627                 >?JUGXAi'{  
20% >       0.46553746                 C3=0st$  
10% >       0.50064115 8SroA$^n  
....... mvpcRe <  

#lMIs4i.  
\25EI]  
这些数值都是MTF值

Criterion           : Geometric MTF average S&T at 30.0000 cycles per mm   M).CyY;bm  
Mode                : Sensitivities *@@dO_%6  
Sampling            : 2 mg._c  
Nominal Criterion   : 0.54403234 =s.0 f:(  
Test Wavelength     : 0.6328 vY4}vHH2  
LrdE
D[Z  
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？ <f)T*E^5%  
"85)2*+  
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