[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 /$%apci8  
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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 E/Q[J.$o  
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图片:2.jpg

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然后运行分析的结果如下： K!).QB'  
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Analysis of Tolerances 2pQ zT  
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File : E:\光学设计资料\zemax练习\f500.ZMX Pn[-{nz  
Title: ~Ub'5
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Date : TUE JUN 21 2011 ,*+F
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Units are Millimeters. "S,,BjL  
All changes are computed using linear differences. gH,^XZe  
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Paraxial Focus compensation only. ?.LS_e_0  
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WARNING: Solves should be removed prior to tolerancing. o3#qp>R  
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Mnemonics: f0~<qT?:n  
TFRN: Tolerance on curvature in fringes. q3z<v:=1y  
TTHI: Tolerance on thickness. Z]@my,+Z;  
TSDX: Tolerance on surface decentering in x. "@xI  
TSDY: Tolerance on surface decentering in y. ||;V5iR
:  
TSTX: Tolerance on surface tilt in x (degrees). $>hPB[[  
TSTY: Tolerance on surface tilt in y (degrees). u<!8dQ8  
TIRR: Tolerance on irregularity (fringes). k-Hy>5;  
TIND: Tolerance on Nd index of refraction. +g(>]!swb  
TEDX: Tolerance on element decentering in x. 'P0:1
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TEDY: Tolerance on element decentering in y. }u5/  
TETX: Tolerance on element tilt in x (degrees). XT9]+b8(M  
TETY: Tolerance on element tilt in y (degrees). % r`hW\4{  
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WARNING: RAY AIMING IS OFF. Very loose tolerances may not be computed accurately. \uQ yp*P1s  
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WARNING: Boundary constraints on compensators will be ignored. 8d?r )/~  
6ey{+8  
Criterion           : Geometric MTF average S&T at 30.0000 cycles per mm --6C>iY[&u  
Mode                : Sensitivities !i,Eo-[Z  
Sampling            : 2 z\Hg@J&#  
Nominal Criterion   : 0.54403234 <wfPbzs-V  
Test Wavelength     : 0.6328 r7+"i9  

J$F 1sy  
5Tag-+  
Fields: XY Symmetric Angle in degrees WWhAm{m  
#      X-Field      Y-Field       Weight    VDX    VDY    VCX    VCY ~2PD%+e7]  
1   0.000E+000   0.000E+000   1.000E+000  0.000  0.000  0.000  0.000 y-6k<RN
 

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Sensitivity Analysis: {$-lXw4  
j#G4A%_  
                 |----------------- Minimum ----------------| |----------------- Maximum ----------------| S~()A*5  
Type                      Value      Criterion        Change          Value      Criterion        Change |J-Osi  
Fringe tolerance on surface 1 "yJFb=Xdq  
TFRN   1            -1.00000000     0.54257256    -0.00145977     1.00000000     0.54548607     0.00145374 Rsd~t_a1  
Change in Focus                :      -0.000000                            0.000000 ~Ap.#VIc'  
Fringe tolerance on surface 2 akATwSrU  
TFRN   2            -1.00000000     0.54177471    -0.00225762     1.00000000     0.54627463     0.00224230 q4=Gj`\43  
Change in Focus                :       0.000000                            0.000000 6|:K1bI)  
Fringe tolerance on surface 3 PvF3a`&r  
TFRN   3            -1.00000000     0.54779866     0.00376632     1.00000000     0.54022572    -0.00380662 ?*cr|G$r[  
Change in Focus                :      -0.000000                            0.000000 WVyk?SBw  
Thickness tolerance on surface 1 L|ZxB7xk  
TTHI   1   3        -0.20000000     0.54321462    -0.00081772     0.20000000     0.54484759     0.00081525 C$WUg<kcK'  
Change in Focus                :       0.000000                            0.000000 Nk?eVJ)  
Thickness tolerance on surface 2 6i'GM`>w  
TTHI   2   3        -0.20000000     0.54478712     0.00075478     0.20000000     0.54327558    -0.00075675 yhm
6%  
Change in Focus                :       0.000000                           -0.000000 %])U(  
Decenter X tolerance on surfaces 1 through 3 _}+Aw{7!r  
TEDX   1   3        -0.20000000     0.54401464   -1.7700E-005     0.20000000     0.54401464   -1.7700E-005 zW#P ~zS  
Change in Focus                :       0.000000                            0.000000 v+d} _rCT  
Decenter Y tolerance on surfaces 1 through 3 CGw,RNV  
TEDY   1   3        -0.20000000     0.54401464   -1.7700E-005     0.20000000     0.54401464   -1.7700E-005 3MX&%_wUhB  
Change in Focus                :       0.000000                            0.000000 g?B4b7II  
Tilt X tolerance on surfaces 1 through 3 (degrees) StLFq6BO  
TETX   1   3        -0.20000000     0.54897548     0.00494314     0.20000000     0.54897548     0.00494314 =Ot|d #_  
Change in Focus                :       0.000000                            0.000000 OD[q u  
Tilt Y tolerance on surfaces 1 through 3 (degrees) D[/h7Ha  
TETY   1   3        -0.20000000     0.54897548     0.00494314     0.20000000     0.54897548     0.00494314 RK)1@Tz7!  
Change in Focus                :       0.000000                            0.000000 5<U:Yy  
Decenter X tolerance on surface 1 2(I S*idq  
TSDX   1            -0.20000000     0.53999563    -0.00403671     0.20000000     0.53999563    -0.00403671 *I]/ [d  
Change in Focus                :       0.000000                            0.000000 h'lqj0  
Decenter Y tolerance on surface 1 DpQ\q;  
TSDY   1            -0.20000000     0.53999563    -0.00403671     0.20000000     0.53999563    -0.00403671 .w,$ TezGP  
Change in Focus                :       0.000000                            0.000000 N_wj,yF*  
Tilt X tolerance on surface (degrees) 1 B']-4X{SGa  
TSTX   1            -0.20000000     0.42678383    -0.11724851     0.20000000     0.42678383    -0.11724851 EDAtC  
Change in Focus                :       0.000000                            0.000000 56w uk [)  
Tilt Y tolerance on surface (degrees) 1 mHe[ NkY6  
TSTY   1            -0.20000000     0.42678383    -0.11724851     0.20000000     0.42678383    -0.11724851 :3b.`s(M  
Change in Focus                :       0.000000                            0.000000 bT>MZK8b  
Decenter X tolerance on surface 2 GHNw.<`l?  
TSDX   2            -0.20000000     0.51705427    -0.02697807     0.20000000     0.51705427    -0.02697807 2$r8^}Nj?  
Change in Focus                :       0.000000                            0.000000 ci 4K Nv;  
Decenter Y tolerance on surface 2 QjOO^6Fh  
TSDY   2            -0.20000000     0.51705427    -0.02697807     0.20000000     0.51705427    -0.02697807 )DB\du   
Change in Focus                :       0.000000                            0.000000 9*Q6/?v  
Tilt X tolerance on surface (degrees) 2 4SVIdSA  
TSTX   2            -0.20000000     0.35349910    -0.19053324     0.20000000     0.35349910    -0.19053324 dJv2tVm&'  
Change in Focus                :       0.000000                            0.000000 ~Uw;
6VXV1  
Tilt Y tolerance on surface (degrees) 2 ylm #Xa  
TSTY   2            -0.20000000     0.35349910    -0.19053324     0.20000000     0.35349910    -0.19053324 fHK.q({Qc  
Change in Focus                :       0.000000                            0.000000 :a/l9 m(  
Decenter X tolerance on surface 3 r[g  
TSDX   3            -0.20000000     0.53419039    -0.00984195     0.20000000     0.53419039    -0.00984195 ,I6li7V  
Change in Focus                :       0.000000                            0.000000 y0f:N U  
Decenter Y tolerance on surface 3 @U+#@6  
TSDY   3            -0.20000000     0.53419039    -0.00984195     0.20000000     0.53419039    -0.00984195 5o6X.sC8e  
Change in Focus                :       0.000000                            0.000000 3iM7c.f*/  
Tilt X tolerance on surface (degrees) 3 "7q!u,u  
TSTX   3            -0.20000000     0.42861670    -0.11541563     0.20000000     0.42861670    -0.11541563
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Change in Focus                :       0.000000                            0.000000 : &bJMzB  
Tilt Y tolerance on surface (degrees) 3 \VpN:RI  
TSTY   3            -0.20000000     0.42861670    -0.11541563     0.20000000     0.42861670    -0.11541563 Gg e X  
Change in Focus                :       0.000000                            0.000000 S=}1k,
I  
Irregularity of surface 1 in fringes iD*21c<kd  
TIRR   1            -0.20000000     0.50973587    -0.03429647     0.20000000     0.57333868     0.02930634 40%fOu,u`  
Change in Focus                :       0.000000                            0.000000 p$=Z0p4%LL  
Irregularity of surface 2 in fringes dd=ca0c7e  
TIRR   2            -0.20000000     0.53400904    -0.01002330     0.20000000     0.55360281     0.00957047 OUq%d8W  
Change in Focus                :       0.000000                            0.000000 ]ur?i{S,  
Irregularity of surface 3 in fringes 577
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TIRR   3            -0.20000000     0.58078982     0.03675748     0.20000000     0.49904394    -0.04498840 .Hnhd/ c  
Change in Focus                :       0.000000                            0.000000 B"YN+S
o  
Index tolerance on surface 1 9(3]t}J5 d  
TIND   1            -0.00100000     0.52606778    -0.01796456     0.00100000     0.56121811     0.01718578 xkCM*5:  
Change in Focus                :       0.000000                            0.000000 'ZJb`  
Index tolerance on surface 2 <?nz>vz  
TIND   2            -0.00100000     0.55639086     0.01235852     0.00100000     0.53126361    -0.01276872 qjObu\r  
Change in Focus                :       0.000000                           -0.000000 !YPwql(  
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Worst offenders: {]bmecz  
Type                      Value      Criterion        Change e |K_y~  
TSTY   2            -0.20000000     0.35349910    -0.19053324 jG~
-V<&  
TSTY   2             0.20000000     0.35349910    -0.19053324 Mw3$QRM  
TSTX   2            -0.20000000     0.35349910    -0.19053324 !2Gua1z!CJ  
TSTX   2             0.20000000     0.35349910    -0.19053324 qV9}N-sS  
TSTY   1            -0.20000000     0.42678383    -0.11724851 DIABR%0  
TSTY   1             0.20000000     0.42678383    -0.11724851 _@i-?Q  
TSTX   1            -0.20000000     0.42678383    -0.11724851 eC"k-a8j+  
TSTX   1             0.20000000     0.42678383    -0.11724851 |a#=o}R_  
TSTY   3            -0.20000000     0.42861670    -0.11541563 !Q WNHL  
TSTY   3             0.20000000     0.42861670    -0.11541563 NN#k^[i1  
K@<*m!%<2  
Estimated Performance Changes based upon Root-Sum-Square method: 3-btaG'P  
Nominal MTF                 :     0.54403234 wFF,rUV  
Estimated change            :    -0.36299231 #W6 6`{>  
Estimated MTF               :     0.18104003 JH| D  
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Compensator Statistics: ul3~!9F5F  
Change in back focus: !E&l=*lM.  
Minimum            :        -0.000000 \=D+7'3  
Maximum            :         0.000000 -RJ~Sky[  
Mean               :        -0.000000 >?1GJ5]\s  
Standard Deviation :         0.000000 Zb=;\l*&  
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Monte Carlo Analysis: ep~+]7\  
Number of trials: 20 #K0/ >W  
<THwl/a  
Initial Statistics: Normal Distribution oi]XSh[_s  
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  Trial       Criterion        Change 1.M<u)1GU  
      1     0.42804416    -0.11598818 /O<~n%< G  
Change in Focus                :      -0.400171 #8sy QWlG  
      2     0.54384387    -0.00018847 Mk~U/oq  
Change in Focus                :       1.018470 "b402"&  
      3     0.44510003    -0.09893230 tmOy"mq67  
Change in Focus                :      -0.601922 HU'w[r6a  
      4     0.18154684    -0.36248550 gyq6LRb  
Change in Focus                :       0.920681 ~r?tFE*+  
      5     0.28665820    -0.25737414 bfpeK>T  
Change in Focus                :       1.253875 Oe x  
      6     0.21263372    -0.33139862 r&Nh>6<&/  
Change in Focus                :      -0.903878 Q>\Ho'  
      7     0.40051424    -0.14351809 yH=<KYk  
Change in Focus                :      -1.354815
CcW3o"=4  
      8     0.48754161    -0.05649072 [0qswsV  
Change in Focus                :       0.215922 KAXjvZN1  
      9     0.40357468    -0.14045766 SOE-Kio=B  
Change in Focus                :       0.281783 pfu"vo(t_  
     10     0.26315315    -0.28087919 %f'=9pit  
Change in Focus                :      -1.048393 qtdkK LT  
     11     0.26120585    -0.28282649 U
#[T!E  
Change in Focus                :       1.017611 4lR+nmAZ  
     12     0.24033815    -0.30369419 FAL#p$y}  
Change in Focus                :      -0.109292 
.rG~\Ws  
     13     0.37164046    -0.17239188 G6
2;p#  
Change in Focus                :      -0.692430 rHjDf[5+  
     14     0.48597489    -0.05805744 Op8Gj `  
Change in Focus                :      -0.662040 +'SL5d*  
     15     0.21462327    -0.32940907 P5h
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Change in Focus                :       1.611296 j94~cYV  
     16     0.43378226    -0.11025008 xI<B)6D;f  
Change in Focus                :      -0.640081 4CchE15  
     17     0.39321881    -0.15081353 ;~DrsQb  
Change in Focus                :       0.914906 MM]0}65KG  
     18     0.20692530    -0.33710703 [TQYu:e  
Change in Focus                :       0.801607 ovOV&Zt  
     19     0.51374068    -0.03029165 5L<A7^j  
Change in Focus                :       0.947293 @{#'y4\>  
     20     0.38013374    -0.16389860 A4|7^Ay  
Change in Focus                :       0.667010 (1q
(6!  
50|nQ:u,  
Number of traceable Monte Carlo files generated: 20 9mp`LT  
H;NAS/OhS  
Nominal     0.54403234 "9dZ z/{  
Best        0.54384387    Trial     2 ;hODzfNkS  
Worst       0.18154684    Trial     4 g33Y$Xdk  
Mean        0.35770970 3 ^x&G?)  
Std Dev     0.11156454 v(R^LqE  
+|b#|>6  
K|\0jd)N  
Compensator Statistics: ;F*^c )  
Change in back focus: lK/4"&  
Minimum            :        -1.354815 TghT{h@  
Maximum            :         1.611296 wLiPkW  
Mean               :         0.161872 6W  
Standard Deviation :         0.869664 l%('5oz@\  
c$)>$&([  
90% >       0.20977951               a * CXg.i  
80% >       0.22748071               F'>yBDm*OM  
50% >       0.38667627               bf=\ED^  
20% >       0.46553746               H"A@Q.'  
10% >       0.50064115                ~3Pp}eO~V  
6iXV  
End of Run. '5*&  
O"|d~VQ  
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 9015PEO  

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 A@?-
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-6WSYpHV  
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                 Z!fbc#L6  
80% >       0.22748071                 #)48dW!n  
50% >       0.38667627                 Fo%`X[?  
20% >       0.46553746                 L})*ck
 
10% >       0.50064115 Uugq.'>  
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最后这个数值是MTF值呢，还是MTF的公差？ *V+,X  
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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？？？   ei=u$S.  

T$<'ZC  
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  : Y=<zR9f`  
90% >       0.20977951                 B !
rb*"[  
80% >       0.22748071                 L7xiq{t`Y  
50% >       0.38667627                 B(eiRr3  
20% >       0.46553746                 =dQF}-{!  
10% >       0.50064115 d:cOdm>,  
....... YT)1_>*\  

5*90t{#  
B_8JwMJu3  
这些数值都是MTF值

Criterion           : Geometric MTF average S&T at 30.0000 cycles per mm   20Jlf?  
Mode                : Sensitivities (5hUoDr!  
Sampling            : 2 #0^a-47PA<  
Nominal Criterion   : 0.54403234 l6MBnvi  
Test Wavelength     : 0.6328 .~^A!t  
1NrNTBI@  
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？ oXVx9dZ  
9sv#TT5V  
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