[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 G^{~'TZv%  
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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 7=G6ao7  
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图片:2.jpg

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然后运行分析的结果如下： i\lvxbp  
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Analysis of Tolerances !RJ@;S  
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File : E:\光学设计资料\zemax练习\f500.ZMX  0Y!"3bw|  
Title: !84Lvg0&  
Date : TUE JUN 21 2011 ,R=!ts[qi  
z:S:[X0  
Units are Millimeters. iZk4KX  
All changes are computed using linear differences. >3&  
x .@O]}UH  
Paraxial Focus compensation only. xJ<RQCW$  
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WARNING: Solves should be removed prior to tolerancing. >!Gq[i0  
<Z t]V`-  
Mnemonics: Tp@Yn  
TFRN: Tolerance on curvature in fringes. X"3p/!W.4  
TTHI: Tolerance on thickness. ]2L11"erP  
TSDX: Tolerance on surface decentering in x. 0Gj/yra9MO  
TSDY: Tolerance on surface decentering in y. Z:^<NdKe  
TSTX: Tolerance on surface tilt in x (degrees). T$mT;k  
TSTY: Tolerance on surface tilt in y (degrees). \4qF3#  
TIRR: Tolerance on irregularity (fringes). o#"yFP1  
TIND: Tolerance on Nd index of refraction. >/Z*\6|Zx#  
TEDX: Tolerance on element decentering in x. +|;Ri68  
TEDY: Tolerance on element decentering in y. ?#c "wA&  
TETX: Tolerance on element tilt in x (degrees). POm;lM$  
TETY: Tolerance on element tilt in y (degrees). +Y*4/w[   
lq-F*r\/~+  
WARNING: RAY AIMING IS OFF. Very loose tolerances may not be computed accurately. OqsuuE  
xN$V(ZX4  
WARNING: Boundary constraints on compensators will be ignored. Q65M(x+oy  
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Criterion           : Geometric MTF average S&T at 30.0000 cycles per mm k6DJ(.n'%a  
Mode                : Sensitivities O.#Rr/+)  
Sampling            : 2 [Y@}{[q5  
Nominal Criterion   : 0.54403234 "1"
"1";  
Test Wavelength     : 0.6328 qPi $kecx  
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Fields: XY Symmetric Angle in degrees qm#?DSLap  
#      X-Field      Y-Field       Weight    VDX    VDY    VCX    VCY pqvl,G5  
1   0.000E+000   0.000E+000   1.000E+000  0.000  0.000  0.000  0.000 sAO/yG  
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Sensitivity Analysis: us5Zi#}  
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                 |----------------- Minimum ----------------| |----------------- Maximum ----------------| Te!eM{_$T  
Type                      Value      Criterion        Change          Value      Criterion        Change StR)O))I  
Fringe tolerance on surface 1 S&=@Hj-  
TFRN   1            -1.00000000     0.54257256    -0.00145977     1.00000000     0.54548607     0.00145374 08@4u L
 
Change in Focus                :      -0.000000                            0.000000 L4+R8ojG  
Fringe tolerance on surface 2 AvIheR  
TFRN   2            -1.00000000     0.54177471    -0.00225762     1.00000000     0.54627463     0.00224230 P5dD&  
Change in Focus                :       0.000000                            0.000000
ku57<kb  
Fringe tolerance on surface 3 =|O]X|y-lZ  
TFRN   3            -1.00000000     0.54779866     0.00376632     1.00000000     0.54022572    -0.00380662 ~K)FuL[*  
Change in Focus                :      -0.000000                            0.000000 #WUN=u  
Thickness tolerance on surface 1 LkafB2y  
TTHI   1   3        -0.20000000     0.54321462    -0.00081772     0.20000000     0.54484759     0.00081525 $0{h Uex  
Change in Focus                :       0.000000                            0.000000 _Q\rZ l  
Thickness tolerance on surface 2 uFuH/(}K[  
TTHI   2   3        -0.20000000     0.54478712     0.00075478     0.20000000     0.54327558    -0.00075675 "Aq
LR  
Change in Focus                :       0.000000                           -0.000000 q}'<[Wg  
Decenter X tolerance on surfaces 1 through 3 R/B/|x  
TEDX   1   3        -0.20000000     0.54401464   -1.7700E-005     0.20000000     0.54401464   -1.7700E-005 7"eIZ  
Change in Focus                :       0.000000                            0.000000 kSJ;kz,_  
Decenter Y tolerance on surfaces 1 through 3 8%; .H-  
TEDY   1   3        -0.20000000     0.54401464   -1.7700E-005     0.20000000     0.54401464   -1.7700E-005 oN83`Z  
Change in Focus                :       0.000000                            0.000000 [N*S5^>1  
Tilt X tolerance on surfaces 1 through 3 (degrees) .1h\r, #  
TETX   1   3        -0.20000000     0.54897548     0.00494314     0.20000000     0.54897548     0.00494314 =JTwH>fD  
Change in Focus                :       0.000000                            0.000000 mWoN\Rwj  
Tilt Y tolerance on surfaces 1 through 3 (degrees) b*Hk} !qH  
TETY   1   3        -0.20000000     0.54897548     0.00494314     0.20000000     0.54897548     0.00494314 j$u  
Change in Focus                :       0.000000                            0.000000 &B+_#V=X@  
Decenter X tolerance on surface 1 Z@JTZMN_  
TSDX   1            -0.20000000     0.53999563    -0.00403671     0.20000000     0.53999563    -0.00403671 0jXDjk5'<  
Change in Focus                :       0.000000                            0.000000 1)xj 'n  
Decenter Y tolerance on surface 1 b V_<5PHP  
TSDY   1            -0.20000000     0.53999563    -0.00403671     0.20000000     0.53999563    -0.00403671 ok-q9dM  
Change in Focus                :       0.000000                            0.000000 RU.MJ kYQ5  
Tilt X tolerance on surface (degrees) 1 ykx13|iR  
TSTX   1            -0.20000000     0.42678383    -0.11724851     0.20000000     0.42678383    -0.11724851 2nFr?Y3g,  
Change in Focus                :       0.000000                            0.000000 e=tM=i"  
Tilt Y tolerance on surface (degrees) 1 &"1_n]JO  
TSTY   1            -0.20000000     0.42678383    -0.11724851     0.20000000     0.42678383    -0.11724851 X)TZ S  
Change in Focus                :       0.000000                            0.000000 fA V.Mj-  
Decenter X tolerance on surface 2 EN>a^B+!  
TSDX   2            -0.20000000     0.51705427    -0.02697807     0.20000000     0.51705427    -0.02697807 su60j^e*  
Change in Focus                :       0.000000                            0.000000 m,4'@jg0  
Decenter Y tolerance on surface 2 M.$=tuUL  
TSDY   2            -0.20000000     0.51705427    -0.02697807     0.20000000     0.51705427    -0.02697807 \WUCm.w6\%  
Change in Focus                :       0.000000                            0.000000 {j[*:l0Ui  
Tilt X tolerance on surface (degrees) 2 #5{lOeN  
TSTX   2            -0.20000000     0.35349910    -0.19053324     0.20000000     0.35349910    -0.19053324  Cb|R  
Change in Focus                :       0.000000                            0.000000 ]3U|K .G  
Tilt Y tolerance on surface (degrees) 2 =xH>,-8}  
TSTY   2            -0.20000000     0.35349910    -0.19053324     0.20000000     0.35349910    -0.19053324 Y}\3PaUa  
Change in Focus                :       0.000000                            0.000000 :W'.SRD  
Decenter X tolerance on surface 3 vMXn#eR  
TSDX   3            -0.20000000     0.53419039    -0.00984195     0.20000000     0.53419039    -0.00984195 T
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Change in Focus                :       0.000000                            0.000000 ZE/Aj/7Qy  
Decenter Y tolerance on surface 3 xnZ  
TSDY   3            -0.20000000     0.53419039    -0.00984195     0.20000000     0.53419039    -0.00984195 85H*Xm?d#  
Change in Focus                :       0.000000                            0.000000 hg^klQD  
Tilt X tolerance on surface (degrees) 3 ccW{88II7w  
TSTX   3            -0.20000000     0.42861670    -0.11541563     0.20000000     0.42861670    -0.11541563 v`jFWq8I,  
Change in Focus                :       0.000000                            0.000000 A~a7/N6s;  
Tilt Y tolerance on surface (degrees) 3 p|r>tBv?x  
TSTY   3            -0.20000000     0.42861670    -0.11541563     0.20000000     0.42861670    -0.11541563 )qWO}]F  
Change in Focus                :       0.000000                            0.000000 r_V^sX  
Irregularity of surface 1 in fringes {X\FS  
TIRR   1            -0.20000000     0.50973587    -0.03429647     0.20000000     0.57333868     0.02930634 V2 }.X+u&<  
Change in Focus                :       0.000000                            0.000000 ' b,zE[Q  
Irregularity of surface 2 in fringes |L)qH"Eo  
TIRR   2            -0.20000000     0.53400904    -0.01002330     0.20000000     0.55360281     0.00957047 !uKuO  
Change in Focus                :       0.000000                            0.000000 HM\}C.u  
Irregularity of surface 3 in fringes 5e'**tbKH  
TIRR   3            -0.20000000     0.58078982     0.03675748     0.20000000     0.49904394    -0.04498840 U<
yKC8  
Change in Focus                :       0.000000                            0.000000 $yZP"AsAR  
Index tolerance on surface 1 )B^T7{  
TIND   1            -0.00100000     0.52606778    -0.01796456     0.00100000     0.56121811     0.01718578 y=1(o3(
 
Change in Focus                :       0.000000                            0.000000 BQ~\p\  
Index tolerance on surface 2 Nu; 9  
TIND   2            -0.00100000     0.55639086     0.01235852     0.00100000     0.53126361    -0.01276872 {RH)&k&%  
Change in Focus                :       0.000000                           -0.000000 PiX(Ase  
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Worst offenders: `]2y=f<{X  
Type                      Value      Criterion        Change ({t6Cbw  
TSTY   2            -0.20000000     0.35349910    -0.19053324 ~HX'8\5  
TSTY   2             0.20000000     0.35349910    -0.19053324 C:}"?tri  
TSTX   2            -0.20000000     0.35349910    -0.19053324 l'\m'Ioh  
TSTX   2             0.20000000     0.35349910    -0.19053324 CakB`q(8  
TSTY   1            -0.20000000     0.42678383    -0.11724851 0^MRPE|f5  
TSTY   1             0.20000000     0.42678383    -0.11724851 -fx$)d~  
TSTX   1            -0.20000000     0.42678383    -0.11724851 'p,54<e  
TSTX   1             0.20000000     0.42678383    -0.11724851 T "t%>g  
TSTY   3            -0.20000000     0.42861670    -0.11541563 Znh<r[p<  
TSTY   3             0.20000000     0.42861670    -0.11541563 DM !B@  

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Estimated Performance Changes based upon Root-Sum-Square method: ,NU
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Nominal MTF                 :     0.54403234 VSm{]Z!x  
Estimated change            :    -0.36299231 (Mt-2+"+  
Estimated MTF               :     0.18104003 :LR>U;2  
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Compensator Statistics: :AC(  \  
Change in back focus: lLL)S  
Minimum            :        -0.000000 TC._kAm  
Maximum            :         0.000000 ,-Yl%R.W=  
Mean               :        -0.000000 Cy\! H&0wg  
Standard Deviation :         0.000000 &;%LTF@I,  
M[ ,:NE4H  
Monte Carlo Analysis: SfwNNX%  
Number of trials: 20 *h"7!g  
#6Fc-ysk:  
Initial Statistics: Normal Distribution {cAGOxwd  
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  Trial       Criterion        Change $[*<e~?  
      1     0.42804416    -0.11598818 s ` +cQ  
Change in Focus                :      -0.400171 $+[ v17lF  
      2     0.54384387    -0.00018847 8}!WJ2[R  
Change in Focus                :       1.018470 [`|gj  
      3     0.44510003    -0.09893230 ;XGO@*V5T  
Change in Focus                :      -0.601922 ]hi5nA  
      4     0.18154684    -0.36248550 0\yA6`}!  
Change in Focus                :       0.920681 kR;Hb3hb  
      5     0.28665820    -0.25737414 [Xo[J?w],2  
Change in Focus                :       1.253875 g,5Tr_  
      6     0.21263372    -0.33139862 f5&K=4khn  
Change in Focus                :      -0.903878 b*"%E,?  
      7     0.40051424    -0.14351809 _{YUWV50}  
Change in Focus                :      -1.354815 : ]~G9]R`  
      8     0.48754161    -0.05649072 m3 W  
Change in Focus                :       0.215922 GA"zO,  
      9     0.40357468    -0.14045766 `"qSr%|  
Change in Focus                :       0.281783
c\(CbC  
     10     0.26315315    -0.28087919 Meo. V|1  
Change in Focus                :      -1.048393 /X97dF)zt  
     11     0.26120585    -0.28282649 X< p KAO\  
Change in Focus                :       1.017611 Xg1QF^  
     12     0.24033815    -0.30369419 xr1,D5  
Change in Focus                :      -0.109292 v,A8Mk2s#  
     13     0.37164046    -0.17239188 E4N{;'  
Change in Focus                :      -0.692430 'P3jUc)  
     14     0.48597489    -0.05805744 y` 6!Vj l  
Change in Focus                :      -0.662040 F>s5<pKAX  
     15     0.21462327    -0.32940907 QlK]2r9  
Change in Focus                :       1.611296 2"!s8x1$  
     16     0.43378226    -0.11025008 Z+G/==%3#,  
Change in Focus                :      -0.640081 Y4I;-&d's  
     17     0.39321881    -0.15081353 ,FDRU  
Change in Focus                :       0.914906 2N[/Cc2Tg/  
     18     0.20692530    -0.33710703 tkKiuh?m  
Change in Focus                :       0.801607 R&]#@PW^  
     19     0.51374068    -0.03029165 Ipyr+7/zJ  
Change in Focus                :       0.947293 p5\B0G<m  
     20     0.38013374    -0.16389860 M)j.Uu  
Change in Focus                :       0.667010 `0Bk@B[>  
yJ?S7+b  
Number of traceable Monte Carlo files generated: 20 \*5${[  
E8]kd  
Nominal     0.54403234 ;dZuO[4\  
Best        0.54384387    Trial     2 0;2"X
[e  
Worst       0.18154684    Trial     4 4Bz:n  
Mean        0.35770970 oA]rwaUX  
Std Dev     0.11156454 ~l"]J'jF"H  
b,uudtlH  
jPa"|9A  
Compensator Statistics: |!E: [UH  
Change in back focus: _mc-CZ  
Minimum            :        -1.354815 u@pimRVo  
Maximum            :         1.611296 QSSA)  
Mean               :         0.161872 6w)a.^yx7  
Standard Deviation :         0.869664 q1?}G5a?  
&ws^Dm]R  
90% >       0.20977951               25{-GaB
 
80% >       0.22748071               D,P{ ,/  
50% >       0.38667627               rc`}QoB)R  
20% >       0.46553746               uJ T^=Y  
10% >       0.50064115                X)b@ia'"Wp  
z1S p'h$  
End of Run. x ?24oO  
)J{.z  
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 dpSNh1  

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 FS^~e-A  
3>QkO.b  
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                 Swr4De_5  
80% >       0.22748071                 1Li*n6tLX`  
50% >       0.38667627                 YD;G+"n?T  
20% >       0.46553746                 3$wK*xK  
10% >       0.50064115 %Ai' 6  
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最后这个数值是MTF值呢，还是MTF的公差？ )2a)$qx;  
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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？？？   RqX^$C8M  
Zm0'p!  
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  : HA*L*:0  
90% >       0.20977951                 a5GLbanF  
80% >       0.22748071                 {eV8h}KIl  
50% >       0.38667627                 Be=rBrI>  
20% >       0.46553746                 kJp~'\b  
10% >       0.50064115 !7 dct#4  
....... qS2Nk.e]o  

\1Xk[%  
!~Uj 'w  
这些数值都是MTF值

Criterion           : Geometric MTF average S&T at 30.0000 cycles per mm   w8UuwFG?<  
Mode                : Sensitivities u]};QR  
Sampling            : 2 RhH1nf2UR  
Nominal Criterion   : 0.54403234 Y~-y\l;Tr  
Test Wavelength     : 0.6328 &~ y)b`r  
kkF)Tro\  
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？ LH8jT  
CWn\KR  
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