[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 Y*B}^!k6  
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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 -`FTWH  
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图片:2.jpg

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然后运行分析的结果如下： kiZA$:V8  
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Analysis of Tolerances \O^b|0zc  
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File : E:\光学设计资料\zemax练习\f500.ZMX TJp(  
Title: ZVR0Kzu?Ra  
Date : TUE JUN 21 2011 D#1'#di*t  
 o-_0  
Units are Millimeters. h$G&4_O  
All changes are computed using linear differences. 2Do^N5y  
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Paraxial Focus compensation only. =sPY+~<o  
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WARNING: Solves should be removed prior to tolerancing. [l:3F<M  
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Mnemonics: e$45OL  
TFRN: Tolerance on curvature in fringes. q4|TwRx
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TTHI: Tolerance on thickness. 8sx\b  
TSDX: Tolerance on surface decentering in x. r,A750P^  
TSDY: Tolerance on surface decentering in y. ABSAle  
TSTX: Tolerance on surface tilt in x (degrees). ;KWR/?ec  
TSTY: Tolerance on surface tilt in y (degrees). T""X~+{Z@  
TIRR: Tolerance on irregularity (fringes). gk"S`1>  
TIND: Tolerance on Nd index of refraction. ^g$k4  
TEDX: Tolerance on element decentering in x. [kMXr'TyPX  
TEDY: Tolerance on element decentering in y. ,pq<.?&E  
TETX: Tolerance on element tilt in x (degrees). "gfy6m  
TETY: Tolerance on element tilt in y (degrees). \RnGKQ"4  
Bi]`e_(}  
WARNING: RAY AIMING IS OFF. Very loose tolerances may not be computed accurately. |)}F}~&  
J@=1zL  
WARNING: Boundary constraints on compensators will be ignored. sT?Qlj'Zd  
]m{;yOQdsC  
Criterion           : Geometric MTF average S&T at 30.0000 cycles per mm Y [0S  
Mode                : Sensitivities C=t:0.:PJ  
Sampling            : 2 u 3wF)B{  
Nominal Criterion   : 0.54403234 /x"gpKwsB  
Test Wavelength     : 0.6328 qN1(mxa.?  
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:=UiEDN@  
Fields: XY Symmetric Angle in degrees no?TEXp*  
#      X-Field      Y-Field       Weight    VDX    VDY    VCX    VCY @sO*O4os>  
1   0.000E+000   0.000E+000   1.000E+000  0.000  0.000  0.000  0.000 72GXgah  
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Sensitivity Analysis: >r2m1}6g"  
36s[hg  
                 |----------------- Minimum ----------------| |----------------- Maximum ----------------| is}o5\JEL  
Type                      Value      Criterion        Change          Value      Criterion        Change &,4^LFZW  
Fringe tolerance on surface 1 IvTtQq  
TFRN   1            -1.00000000     0.54257256    -0.00145977     1.00000000     0.54548607     0.00145374 $h0]  
Change in Focus                :      -0.000000                            0.000000 =#[_8)q  
Fringe tolerance on surface 2 YQG[8I  
TFRN   2            -1.00000000     0.54177471    -0.00225762     1.00000000     0.54627463     0.00224230 ]F r+cP  
Change in Focus                :       0.000000                            0.000000 N'+d1  
Fringe tolerance on surface 3 y@ J\h8_  
TFRN   3            -1.00000000     0.54779866     0.00376632     1.00000000     0.54022572    -0.00380662 sZ{Kl\1@  
Change in Focus                :      -0.000000                            0.000000 X's-i!  
Thickness tolerance on surface 1 2-ev7:  
TTHI   1   3        -0.20000000     0.54321462    -0.00081772     0.20000000     0.54484759     0.00081525 E j@M\  
Change in Focus                :       0.000000                            0.000000
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Thickness tolerance on surface 2 `<zaxO  
TTHI   2   3        -0.20000000     0.54478712     0.00075478     0.20000000     0.54327558    -0.00075675 f&bY=$iff  
Change in Focus                :       0.000000                           -0.000000 j01.`G7Q  
Decenter X tolerance on surfaces 1 through 3 [-f0s;F1%  
TEDX   1   3        -0.20000000     0.54401464   -1.7700E-005     0.20000000     0.54401464   -1.7700E-005 'm# -)R!  
Change in Focus                :       0.000000                            0.000000 >|KfO>  
Decenter Y tolerance on surfaces 1 through 3 %@'9<i8o  
TEDY   1   3        -0.20000000     0.54401464   -1.7700E-005     0.20000000     0.54401464   -1.7700E-005 *YZ'Uy?  
Change in Focus                :       0.000000                            0.000000 AMA:hQ  
Tilt X tolerance on surfaces 1 through 3 (degrees) - o
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TETX   1   3        -0.20000000     0.54897548     0.00494314     0.20000000     0.54897548     0.00494314 0|9(oP/:  
Change in Focus                :       0.000000                            0.000000 c5>&~^~>Tx  
Tilt Y tolerance on surfaces 1 through 3 (degrees) "5BgajrB  
TETY   1   3        -0.20000000     0.54897548     0.00494314     0.20000000     0.54897548     0.00494314 :!;BOCTYI  
Change in Focus                :       0.000000                            0.000000 %4Ylq|d  
Decenter X tolerance on surface 1 1wmS?  
TSDX   1            -0.20000000     0.53999563    -0.00403671     0.20000000     0.53999563    -0.00403671 zkYlIUD  
Change in Focus                :       0.000000                            0.000000 <~!7?ak  
Decenter Y tolerance on surface 1 ~j" aJ /  
TSDY   1            -0.20000000     0.53999563    -0.00403671     0.20000000     0.53999563    -0.00403671 jb$sIZ%i  
Change in Focus                :       0.000000                            0.000000 t(VG#}  
Tilt X tolerance on surface (degrees) 1 AGQCk*dm  
TSTX   1            -0.20000000     0.42678383    -0.11724851     0.20000000     0.42678383    -0.11724851 fz31di9$  
Change in Focus                :       0.000000                            0.000000 9-eYCg7C|  
Tilt Y tolerance on surface (degrees) 1 1 h|cr_  
TSTY   1            -0.20000000     0.42678383    -0.11724851     0.20000000     0.42678383    -0.11724851 Y=sRVypJ  
Change in Focus                :       0.000000                            0.000000  HUr;ysw  
Decenter X tolerance on surface 2 b[$%Wg  
TSDX   2            -0.20000000     0.51705427    -0.02697807     0.20000000     0.51705427    -0.02697807 Vj_(55WQ  
Change in Focus                :       0.000000                            0.000000 8s-RNA>7^  
Decenter Y tolerance on surface 2 z[b,:G  
TSDY   2            -0.20000000     0.51705427    -0.02697807     0.20000000     0.51705427    -0.02697807 d{0b
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Change in Focus                :       0.000000                            0.000000 YiB]}/  
Tilt X tolerance on surface (degrees) 2 w&f8AY)#]4  
TSTX   2            -0.20000000     0.35349910    -0.19053324     0.20000000     0.35349910    -0.19053324 s@OCj0'l  
Change in Focus                :       0.000000                            0.000000 qEX2K^y'4"  
Tilt Y tolerance on surface (degrees) 2 7
3
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TSTY   2            -0.20000000     0.35349910    -0.19053324     0.20000000     0.35349910    -0.19053324 L^yQb4$&M  
Change in Focus                :       0.000000                            0.000000 FVMR9~&+  
Decenter X tolerance on surface 3 18z{d9'F   
TSDX   3            -0.20000000     0.53419039    -0.00984195     0.20000000     0.53419039    -0.00984195 d?GfT$1  
Change in Focus                :       0.000000                            0.000000 YYr &Jcj  
Decenter Y tolerance on surface 3 kX
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TSDY   3            -0.20000000     0.53419039    -0.00984195     0.20000000     0.53419039    -0.00984195 9xP{#Qa  
Change in Focus                :       0.000000                            0.000000 5s8S;Pb]<  
Tilt X tolerance on surface (degrees) 3 A3*ti!X<6  
TSTX   3            -0.20000000     0.42861670    -0.11541563     0.20000000     0.42861670    -0.11541563 #`RYKQwB  
Change in Focus                :       0.000000                            0.000000 8jd<|nYnfc  
Tilt Y tolerance on surface (degrees) 3 B~^MhX +j  
TSTY   3            -0.20000000     0.42861670    -0.11541563     0.20000000     0.42861670    -0.11541563 gZ
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Change in Focus                :       0.000000                            0.000000 VQU[5C  
Irregularity of surface 1 in fringes g4<%t,(88E  
TIRR   1            -0.20000000     0.50973587    -0.03429647     0.20000000     0.57333868     0.02930634 %P0dY:L~  
Change in Focus                :       0.000000                            0.000000 JiEcPii  
Irregularity of surface 2 in fringes #B8`qFpQC  
TIRR   2            -0.20000000     0.53400904    -0.01002330     0.20000000     0.55360281     0.00957047 d#Sc4xuf  
Change in Focus                :       0.000000                            0.000000 q@F"fjWBr  
Irregularity of surface 3 in fringes [6K2V:6:  
TIRR   3            -0.20000000     0.58078982     0.03675748     0.20000000     0.49904394    -0.04498840 |Yh-`~~A"  
Change in Focus                :       0.000000                            0.000000 hhlQ!WV2  
Index tolerance on surface 1 q -M&f@Il  
TIND   1            -0.00100000     0.52606778    -0.01796456     0.00100000     0.56121811     0.01718578 OOQfa#~k  
Change in Focus                :       0.000000                            0.000000 {S%)GvrT  
Index tolerance on surface 2 il<D e]G  
TIND   2            -0.00100000     0.55639086     0.01235852     0.00100000     0.53126361    -0.01276872 _s><>LH~  
Change in Focus                :       0.000000                           -0.000000 '!Ps4ZTn_  
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Worst offenders: Wv_5sPqLW  
Type                      Value      Criterion        Change M$ep.<Z1|  
TSTY   2            -0.20000000     0.35349910    -0.19053324 7Ro7/PT(  
TSTY   2             0.20000000     0.35349910    -0.19053324 g-E!*K  
TSTX   2            -0.20000000     0.35349910    -0.19053324 KSIH1E  
TSTX   2             0.20000000     0.35349910    -0.19053324 VH4P|w[YF  
TSTY   1            -0.20000000     0.42678383    -0.11724851 |xZDc6HDW  
TSTY   1             0.20000000     0.42678383    -0.11724851 J_}&Btb)e  
TSTX   1            -0.20000000     0.42678383    -0.11724851 'G>Ejh@t  
TSTX   1             0.20000000     0.42678383    -0.11724851 LTp5T|O  
TSTY   3            -0.20000000     0.42861670    -0.11541563 ?=jmyDXH!  
TSTY   3             0.20000000     0.42861670    -0.11541563 VD/Wl2DK  
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Estimated Performance Changes based upon Root-Sum-Square method: GsqR8n=  
Nominal MTF                 :     0.54403234 @I\Z2-J  
Estimated change            :    -0.36299231 L$zT
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Estimated MTF               :     0.18104003 g-pDk*|I,Q  
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Compensator Statistics: r=n|MT^O  
Change in back focus: %2^C  
Minimum            :        -0.000000 2n?\tOm(V  
Maximum            :         0.000000 1@yXVD/  
Mean               :        -0.000000 _Ta9rDSP]  
Standard Deviation :         0.000000 to[EA6J8l  
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Monte Carlo Analysis: j$T2ff6  
Number of trials: 20 MVjc.^  
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Initial Statistics: Normal Distribution Tr)a6Cf  
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  Trial       Criterion        Change w!:u|  
      1     0.42804416    -0.11598818 {-^>) iJqt  
Change in Focus                :      -0.400171 1]A%lud4  
      2     0.54384387    -0.00018847 -4,qAnuMx  
Change in Focus                :       1.018470 4v3
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      3     0.44510003    -0.09893230 {5.,gb@6  
Change in Focus                :      -0.601922 j_&/^-;e  
      4     0.18154684    -0.36248550 cmt3ceCb  
Change in Focus                :       0.920681 9V?MJZ@aG  
      5     0.28665820    -0.25737414 c1wgb8  
Change in Focus                :       1.253875 L}nj#z4g  
      6     0.21263372    -0.33139862 2c5>0f  
Change in Focus                :      -0.903878 4I"QT(;  
      7     0.40051424    -0.14351809 cy)L%`(7  
Change in Focus                :      -1.354815 & ?/h5<  
      8     0.48754161    -0.05649072 gwThhwR  
Change in Focus                :       0.215922 }tft@,dIC  
      9     0.40357468    -0.14045766 2-o,4EfHVO  
Change in Focus                :       0.281783 P{(m:`N  
     10     0.26315315    -0.28087919 \b.2f+;3  
Change in Focus                :      -1.048393 #Q 2$
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     11     0.26120585    -0.28282649 ^>GL<1 1  
Change in Focus                :       1.017611 PHDKx+$  
     12     0.24033815    -0.30369419 1dfA 8=L,s  
Change in Focus                :      -0.109292 =)Ew6} W6  
     13     0.37164046    -0.17239188 GK95=?f~8;  
Change in Focus                :      -0.692430 F5:*;E;$  
     14     0.48597489    -0.05805744 m{pL< g^M  
Change in Focus                :      -0.662040 g.DgJX&i  
     15     0.21462327    -0.32940907 CEYHD?9k8  
Change in Focus                :       1.611296 XS9k&~)*  
     16     0.43378226    -0.11025008 uAzVa!)  
Change in Focus                :      -0.640081 n+zXt?{u  
     17     0.39321881    -0.15081353 BRoi`.b:  
Change in Focus                :       0.914906 =_%:9FnQ0  
     18     0.20692530    -0.33710703 BTjF^&`  
Change in Focus                :       0.801607 w#Nn(!VR  
     19     0.51374068    -0.03029165 +;Cq>1x,  
Change in Focus                :       0.947293 6 Y&OG>_\  
     20     0.38013374    -0.16389860 <FS/'[P  
Change in Focus                :       0.667010 WRVKh  
:U?P~HI  
Number of traceable Monte Carlo files generated: 20 jt3s;U*  
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Nominal     0.54403234 En5Bsz!  
Best        0.54384387    Trial     2 L2{tof  
Worst       0.18154684    Trial     4 Mk@_uPm  
Mean        0.35770970 1(q!.lPc  
Std Dev     0.11156454 2(\>PN-  
T:;e73  
htM5Nm[g  
Compensator Statistics: 5? c4aAn  
Change in back focus: U%gP2]t%cs  
Minimum            :        -1.354815 J4`08,  
Maximum            :         1.611296 >/e#Z h  
Mean               :         0.161872 ]YevO(  
Standard Deviation :         0.869664 \VtCkb  
N:L<ySJ7  
90% >       0.20977951               N_C\L2  
80% >       0.22748071               O;H/15j:sK  
50% >       0.38667627               v#-%_V>ph  
20% >       0.46553746               l*nSgUg  
10% >       0.50064115                Oo7n_h1  
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End of Run. Yo7ctwzdH;  
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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 ),
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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 #7Qn\C2  
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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                 Ma{|+\Q.Z  
80% >       0.22748071                 ](T*f'LN  
50% >       0.38667627                 q=96Ci_a  
20% >       0.46553746                 $]Fe9E?   
10% >       0.50064115 >TL0hBaaR  
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最后这个数值是MTF值呢，还是MTF的公差？ N|7._AR2  
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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？？？   Cs*u{O  
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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  : xJZbax[  
90% >       0.20977951                 %]  
80% >       0.22748071                 Af*^u|#  
50% >       0.38667627                 LI(Wu6*Y  
20% >       0.46553746                 v\f 41M7D  
10% >       0.50064115 sFB; /*C  
....... 7?cZ9^z`w  

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*S{%+1F  
这些数值都是MTF值

Criterion           : Geometric MTF average S&T at 30.0000 cycles per mm   0y|}}92:  
Mode                : Sensitivities SAXjB;VH6  
Sampling            : 2 rWSw1(sAA  
Nominal Criterion   : 0.54403234 }&;0:hw%  
Test Wavelength     : 0.6328 [)9bR1wh  
nvpdu)q<  
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？ UHweV:(|T  
K3'`!Ka*  
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