[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 -V||1@ |  
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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 *,wW-8  
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图片:2.jpg

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然后运行分析的结果如下： Bo/i =/7%  
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Analysis of Tolerances  ;.~D!  
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File : E:\光学设计资料\zemax练习\f500.ZMX  +qyx3c+  
Title: ^]$rh.7&  
Date : TUE JUN 21 2011 Y,X0x-   
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Units are Millimeters. P)UpUMt;k  
All changes are computed using linear differences. 'Y>@t6E4  
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Paraxial Focus compensation only. /qXP\ a  
z-`4DlJUS  
WARNING: Solves should be removed prior to tolerancing. !Ee&e~"  
:tLMh08h  
Mnemonics: ;-kg3fGB1Q  
TFRN: Tolerance on curvature in fringes. `W4Is~VVv  
TTHI: Tolerance on thickness. h ?+vH{}j  
TSDX: Tolerance on surface decentering in x. <&}N[  
TSDY: Tolerance on surface decentering in y. oh >0}Gc8  
TSTX: Tolerance on surface tilt in x (degrees). .c_qMTm"  
TSTY: Tolerance on surface tilt in y (degrees). 4I;$a;R!  
TIRR: Tolerance on irregularity (fringes). Qr[".>+  
TIND: Tolerance on Nd index of refraction. \0^Je>-:U  
TEDX: Tolerance on element decentering in x. oF5~|&C  
TEDY: Tolerance on element decentering in y. 4zf(  
TETX: Tolerance on element tilt in x (degrees). tnw6[U!rh=  
TETY: Tolerance on element tilt in y (degrees). S!7|vb*ko  
r7*'s  
WARNING: RAY AIMING IS OFF. Very loose tolerances may not be computed accurately. `AhTER  
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WARNING: Boundary constraints on compensators will be ignored. g<MCvC@  
4-q8:5  
Criterion           : Geometric MTF average S&T at 30.0000 cycles per mm <#7j~<  
Mode                : Sensitivities i7xBi:Si  
Sampling            : 2 qLm g18  
Nominal Criterion   : 0.54403234 [L>AU; :  
Test Wavelength     : 0.6328 ngH_p>  
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Yfx'7gj  
Fields: XY Symmetric Angle in degrees Ert` ]s~  
#      X-Field      Y-Field       Weight    VDX    VDY    VCX    VCY P64<O5l/  
1   0.000E+000   0.000E+000   1.000E+000  0.000  0.000  0.000  0.000 o1u?H4z  
&+8cI^kp  
Sensitivity Analysis: I>spJ5ls  
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                 |----------------- Minimum ----------------| |----------------- Maximum ----------------| RMBPm*H  
Type                      Value      Criterion        Change          Value      Criterion        Change  76EMS?e  
Fringe tolerance on surface 1 zT jk^  
TFRN   1            -1.00000000     0.54257256    -0.00145977     1.00000000     0.54548607     0.00145374 UN`O*(k[  
Change in Focus                :      -0.000000                            0.000000 >/DlxYG?  
Fringe tolerance on surface 2 R"[U<^  
TFRN   2            -1.00000000     0.54177471    -0.00225762     1.00000000     0.54627463     0.00224230 -l q,~`v  
Change in Focus                :       0.000000                            0.000000 x=VLRh%Gvl  
Fringe tolerance on surface 3 Y kc
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TFRN   3            -1.00000000     0.54779866     0.00376632     1.00000000     0.54022572    -0.00380662 CYN|  
Change in Focus                :      -0.000000                            0.000000 ~_"/\;
1  
Thickness tolerance on surface 1 [xg&`x9,.  
TTHI   1   3        -0.20000000     0.54321462    -0.00081772     0.20000000     0.54484759     0.00081525
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Change in Focus                :       0.000000                            0.000000 $oH?7sj  
Thickness tolerance on surface 2 B}Sl1)E  
TTHI   2   3        -0.20000000     0.54478712     0.00075478     0.20000000     0.54327558    -0.00075675 O\)rp!i  
Change in Focus                :       0.000000                           -0.000000 <I^Tug\M+  
Decenter X tolerance on surfaces 1 through 3 kV+O|9  
TEDX   1   3        -0.20000000     0.54401464   -1.7700E-005     0.20000000     0.54401464   -1.7700E-005 f#zm}
+,`  
Change in Focus                :       0.000000                            0.000000 L2^M#G@t  
Decenter Y tolerance on surfaces 1 through 3 #N `Z)}Jm  
TEDY   1   3        -0.20000000     0.54401464   -1.7700E-005     0.20000000     0.54401464   -1.7700E-005 x8E!Ko](  
Change in Focus                :       0.000000                            0.000000 I?%iJ%  
Tilt X tolerance on surfaces 1 through 3 (degrees)  .'^Pg  
TETX   1   3        -0.20000000     0.54897548     0.00494314     0.20000000     0.54897548     0.00494314 OG}m+K&<  
Change in Focus                :       0.000000                            0.000000 F<A[S"  
Tilt Y tolerance on surfaces 1 through 3 (degrees) `'M}.q,k~  
TETY   1   3        -0.20000000     0.54897548     0.00494314     0.20000000     0.54897548     0.00494314 |fg{Fpc  
Change in Focus                :       0.000000                            0.000000 I]Jz[{~1  
Decenter X tolerance on surface 1 44(l1xEN+  
TSDX   1            -0.20000000     0.53999563    -0.00403671     0.20000000     0.53999563    -0.00403671 ^jZ4tH3K  
Change in Focus                :       0.000000                            0.000000 haIH `SY  
Decenter Y tolerance on surface 1 B]5G"4,  
TSDY   1            -0.20000000     0.53999563    -0.00403671     0.20000000     0.53999563    -0.00403671 Kq2,J&Ca3  
Change in Focus                :       0.000000                            0.000000 o<8=@ ^T  
Tilt X tolerance on surface (degrees) 1 MLn\b0  
TSTX   1            -0.20000000     0.42678383    -0.11724851     0.20000000     0.42678383    -0.11724851 $&[}+??  
Change in Focus                :       0.000000                            0.000000 fs wQ*  
Tilt Y tolerance on surface (degrees) 1 XKepk? E  
TSTY   1            -0.20000000     0.42678383    -0.11724851     0.20000000     0.42678383    -0.11724851 v6`TbIq%  
Change in Focus                :       0.000000                            0.000000 u}I\!-EX!v  
Decenter X tolerance on surface 2 uGH>|V9'c  
TSDX   2            -0.20000000     0.51705427    -0.02697807     0.20000000     0.51705427    -0.02697807 {9*k \d/;  
Change in Focus                :       0.000000                            0.000000 @XFy^?  
Decenter Y tolerance on surface 2 DZ~qk+,I  
TSDY   2            -0.20000000     0.51705427    -0.02697807     0.20000000     0.51705427    -0.02697807 x6={)tj  
Change in Focus                :       0.000000                            0.000000 .3yxg}E>{  
Tilt X tolerance on surface (degrees) 2 Ud[Zv?tA:  
TSTX   2            -0.20000000     0.35349910    -0.19053324     0.20000000     0.35349910    -0.19053324 l9Sx'<  
Change in Focus                :       0.000000                            0.000000 0NMekVi
 
Tilt Y tolerance on surface (degrees) 2 +Q6}kbDI  
TSTY   2            -0.20000000     0.35349910    -0.19053324     0.20000000     0.35349910    -0.19053324 1dahVc1W  
Change in Focus                :       0.000000                            0.000000 RkuPMs Hw;  
Decenter X tolerance on surface 3 DKxzk~sOM  
TSDX   3            -0.20000000     0.53419039    -0.00984195     0.20000000     0.53419039    -0.00984195 V8{5 y <Y>  
Change in Focus                :       0.000000                            0.000000 -<Zs7(  
Decenter Y tolerance on surface 3 3G)Wmmh"a  
TSDY   3            -0.20000000     0.53419039    -0.00984195     0.20000000     0.53419039    -0.00984195 s j{i  
Change in Focus                :       0.000000                            0.000000 fd} Ul  
Tilt X tolerance on surface (degrees) 3 KM;'MlO  
TSTX   3            -0.20000000     0.42861670    -0.11541563     0.20000000     0.42861670    -0.11541563 [exIK  
Change in Focus                :       0.000000                            0.000000 _.y0QkwV  
Tilt Y tolerance on surface (degrees) 3 WbW@V_rr  
TSTY   3            -0.20000000     0.42861670    -0.11541563     0.20000000     0.42861670    -0.11541563 Ot#O];3  
Change in Focus                :       0.000000                            0.000000 =UW! 7OzC  
Irregularity of surface 1 in fringes T,eP&IN  
TIRR   1            -0.20000000     0.50973587    -0.03429647     0.20000000     0.57333868     0.02930634 Ysz&/ry  
Change in Focus                :       0.000000                            0.000000 DoA+Bwq@  
Irregularity of surface 2 in fringes ,Bg)p_B  
TIRR   2            -0.20000000     0.53400904    -0.01002330     0.20000000     0.55360281     0.00957047 |p"E0av  
Change in Focus                :       0.000000                            0.000000 =Vm"2g,aA  
Irregularity of surface 3 in fringes g1s\6%g  
TIRR   3            -0.20000000     0.58078982     0.03675748     0.20000000     0.49904394    -0.04498840 kt*""&R  
Change in Focus                :       0.000000                            0.000000 8V$:th('  
Index tolerance on surface 1 >uN)O-  
TIND   1            -0.00100000     0.52606778    -0.01796456     0.00100000     0.56121811     0.01718578 #A '|O\RGP  
Change in Focus                :       0.000000                            0.000000 Ow\dk^\-G8  
Index tolerance on surface 2 #}Qzu~  
TIND   2            -0.00100000     0.55639086     0.01235852     0.00100000     0.53126361    -0.01276872 &58+-jzW  
Change in Focus                :       0.000000                           -0.000000 E1uyMh-dy  
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Worst offenders: `Z:5E  
Type                      Value      Criterion        Change v8>?,N#  
TSTY   2            -0.20000000     0.35349910    -0.19053324 a*Oc:$  
TSTY   2             0.20000000     0.35349910    -0.19053324 Gcseq  
TSTX   2            -0.20000000     0.35349910    -0.19053324 |/R)FT#i  
TSTX   2             0.20000000     0.35349910    -0.19053324 {:;599l  
TSTY   1            -0.20000000     0.42678383    -0.11724851 ;Xw'WMb*=  
TSTY   1             0.20000000     0.42678383    -0.11724851 B8'e,9   
TSTX   1            -0.20000000     0.42678383    -0.11724851 8;
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TSTX   1             0.20000000     0.42678383    -0.11724851 mu?6Phj  
TSTY   3            -0.20000000     0.42861670    -0.11541563 " tUS>c/  
TSTY   3             0.20000000     0.42861670    -0.11541563 !F_BLHig  
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Estimated Performance Changes based upon Root-Sum-Square method: Z`=[hu  
Nominal MTF                 :     0.54403234 cJnAwIs_e`  
Estimated change            :    -0.36299231 e)WpqaI  
Estimated MTF               :     0.18104003 g{}{gBplnl  
xA-u%Vf7@  
Compensator Statistics: ^K#PcPF-j  
Change in back focus: eXqS9`zKr  
Minimum            :        -0.000000 cCoa3U/  
Maximum            :         0.000000 $]Vvu{  
Mean               :        -0.000000 Gs%
cod  
Standard Deviation :         0.000000 v&NC` dVR  
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Monte Carlo Analysis: 8U5L|Ny.q  
Number of trials: 20 RvQl{aL  
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Initial Statistics: Normal Distribution >Bj+!)96q  
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  Trial       Criterion        Change $cxulcay=  
      1     0.42804416    -0.11598818 YB^[HE\#y  
Change in Focus                :      -0.400171 f
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      2     0.54384387    -0.00018847 Z*}5M4  
Change in Focus                :       1.018470 }T}9AQ}|  
      3     0.44510003    -0.09893230 B~o;,}  
Change in Focus                :      -0.601922 me+F0:L  
      4     0.18154684    -0.36248550 !8Rsz:7^-  
Change in Focus                :       0.920681 nnV(MB4z1  
      5     0.28665820    -0.25737414 b0A*zQA_)  
Change in Focus                :       1.253875 ]5+db0  
      6     0.21263372    -0.33139862 J5Nz<  
Change in Focus                :      -0.903878 i,{'}B  
      7     0.40051424    -0.14351809 +$hqwNh@Z@  
Change in Focus                :      -1.354815 dQ5_=(9  
      8     0.48754161    -0.05649072 39|4)1e  
Change in Focus                :       0.215922 meHnT9a^  
      9     0.40357468    -0.14045766 !f\q0Gnl  
Change in Focus                :       0.281783 U9d0nj9 j  
     10     0.26315315    -0.28087919 &vf%E@<  
Change in Focus                :      -1.048393 |6%B2I&c  
     11     0.26120585    -0.28282649 %V>Ss9;/8  
Change in Focus                :       1.017611 t4a/\{/#9|  
     12     0.24033815    -0.30369419 qH3|x08  
Change in Focus                :      -0.109292 BrdHTk= Vy  
     13     0.37164046    -0.17239188 `kn 'RZR  
Change in Focus                :      -0.692430 L"w% ew  
     14     0.48597489    -0.05805744
#bqc}h9  
Change in Focus                :      -0.662040 x:h0/f  
     15     0.21462327    -0.32940907 \,-t]$9  
Change in Focus                :       1.611296 ]}3AP!:  
     16     0.43378226    -0.11025008 CnJrJ>l  
Change in Focus                :      -0.640081 hP=^JH  
     17     0.39321881    -0.15081353 :|s!_G<  
Change in Focus                :       0.914906 s&<6{AU(id  
     18     0.20692530    -0.33710703 K8sgeX|  
Change in Focus                :       0.801607 qP"+SVqC  
     19     0.51374068    -0.03029165 nhfHY-l}7  
Change in Focus                :       0.947293 gD"]uj<  
     20     0.38013374    -0.16389860 /'V(F* g  
Change in Focus                :       0.667010 ]wH,534  
vo9DmW  
Number of traceable Monte Carlo files generated: 20 Op&i6V}<s  
t:DZow  
Nominal     0.54403234 ZfPWH'P  
Best        0.54384387    Trial     2 d-=RS]j;j  
Worst       0.18154684    Trial     4 MeXzWLH  
Mean        0.35770970 0w0\TWz*  
Std Dev     0.11156454 CCCd=s.  
Xknp*(9  
uM!$`JN  
Compensator Statistics: i8F^ N=  
Change in back focus: Qi 3di  
Minimum            :        -1.354815 BO#XQ,  
Maximum            :         1.611296 .?L&k|wX-  
Mean               :         0.161872 Uxla,CCp-  
Standard Deviation :         0.869664 cs]N%M^s  
~uF%*  
90% >       0.20977951               y4%u</  
80% >       0.22748071               3{gD'y4j  
50% >       0.38667627               :ET05MFs\#  
20% >       0.46553746               pzX684  
10% >       0.50064115                V Ae@P  
1o&]=(  
End of Run. RTPxAp+\5  
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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 MIblx  

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 fOE8{O^W  
>k:BG{$Kae  
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                 bjgf8427I  
80% >       0.22748071                 ',
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50% >       0.38667627                 @]*b$6tt  
20% >       0.46553746                 d2b L_  
10% >       0.50064115 z93HTy9  
jy=dB-&  
最后这个数值是MTF值呢，还是MTF的公差？ Sq9I]A  
' 0iXx   
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？？？   Y2&>;ym!  
F
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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  : 0s
jw`<ic  
90% >       0.20977951                 }s;W{Q  
80% >       0.22748071                 \tc`Aj%K  
50% >       0.38667627                 /yHM=&Vg]  
20% >       0.46553746                 h1 \
)_jxA  
10% >       0.50064115 *G"vV>OSV  
....... .lMIJN&/  

b*4[)Yg4  
rvT75dV0  
这些数值都是MTF值

Criterion           : Geometric MTF average S&T at 30.0000 cycles per mm   EUdu"'=4a  
Mode                : Sensitivities A(y^1Nm  
Sampling            : 2 n8"S;:Zm  
Nominal Criterion   : 0.54403234 CFJ F}aW  
Test Wavelength     : 0.6328 kq6K<e4jO  
v'`9^3(-  
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？ 3=xb%Upw  
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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