[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 71k!k&Im  
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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 x !#Ma  


90  

图片:2.jpg

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然后运行分析的结果如下： JwN}Jm  
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Analysis of Tolerances nwa\Lrh  
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File : E:\光学设计资料\zemax练习\f500.ZMX XAjd %Xv<  
Title: d u.HSXK  
Date : TUE JUN 21 2011 (w5u*hx  
{c v;w  
Units are Millimeters. K(-G: |  
All changes are computed using linear differences. %/{IssCR7  
@Ufa-h5"(  
Paraxial Focus compensation only. VKq0<+M  
bWGyLo,  
WARNING: Solves should be removed prior to tolerancing. _v1bTg"?  
(\Rwf}gyR  
Mnemonics: Xtuhcdzu[  
TFRN: Tolerance on curvature in fringes. ??|d=4g\  
TTHI: Tolerance on thickness. R^jlEt\&P  
TSDX: Tolerance on surface decentering in x. *hv=~A $q  
TSDY: Tolerance on surface decentering in y. 9b?
i G  
TSTX: Tolerance on surface tilt in x (degrees). f:_=5e +
  
TSTY: Tolerance on surface tilt in y (degrees). l\K%  
TIRR: Tolerance on irregularity (fringes). *e(:["v  
TIND: Tolerance on Nd index of refraction. Of1IdE6~  
TEDX: Tolerance on element decentering in x. ;):8yBMk  
TEDY: Tolerance on element decentering in y. lr9=OlH  
TETX: Tolerance on element tilt in x (degrees). z[WC7hvU  
TETY: Tolerance on element tilt in y (degrees). IkSX\*  
{F;,7Kn+l  
WARNING: RAY AIMING IS OFF. Very loose tolerances may not be computed accurately. ^dFhg_GhF  
gsW=3m&`  
WARNING: Boundary constraints on compensators will be ignored. wY' "ab  
XxmJP5  
Criterion           : Geometric MTF average S&T at 30.0000 cycles per mm @)9REA(
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Mode                : Sensitivities 5gO/-Zj  
Sampling            : 2 JzHqNUn*M  
Nominal Criterion   : 0.54403234 fp9rO}##  
Test Wavelength     : 0.6328 =YWT|%^uX  
zx ct(  
G1kDM.L  
Fields: XY Symmetric Angle in degrees 9OPK4-  
#      X-Field      Y-Field       Weight    VDX    VDY    VCX    VCY }$^]dn@  
1   0.000E+000   0.000E+000   1.000E+000  0.000  0.000  0.000  0.000
$8jaapNm@  
a`DWpc~  
Sensitivity Analysis: P;j&kuW|zL  
u@AI&[Z  
                 |----------------- Minimum ----------------| |----------------- Maximum ----------------| {?w"hjy  
Type                      Value      Criterion        Change          Value      Criterion        Change 7*+Km'=M  
Fringe tolerance on surface 1 S  <2}8D  
TFRN   1            -1.00000000     0.54257256    -0.00145977     1.00000000     0.54548607     0.00145374 cN62M=**  
Change in Focus                :      -0.000000                            0.000000 L_E^}^1!  
Fringe tolerance on surface 2 +H41]W6  
TFRN   2            -1.00000000     0.54177471    -0.00225762     1.00000000     0.54627463     0.00224230 <#zwKTmK1  
Change in Focus                :       0.000000                            0.000000 :M@MmpPh  
Fringe tolerance on surface 3 #]@9qPyn  
TFRN   3            -1.00000000     0.54779866     0.00376632     1.00000000     0.54022572    -0.00380662 NPS.6qY  
Change in Focus                :      -0.000000                            0.000000 Kl2}o|b   
Thickness tolerance on surface 1 Tj Mb>w9  
TTHI   1   3        -0.20000000     0.54321462    -0.00081772     0.20000000     0.54484759     0.00081525 /j11,O?72  
Change in Focus                :       0.000000                            0.000000 PXa5g5!  
Thickness tolerance on surface 2 A_@I_V$  
TTHI   2   3        -0.20000000     0.54478712     0.00075478     0.20000000     0.54327558    -0.00075675 *nLIXnm  
Change in Focus                :       0.000000                           -0.000000 {W-5:~?"  
Decenter X tolerance on surfaces 1 through 3 -<|Y1PQ  
TEDX   1   3        -0.20000000     0.54401464   -1.7700E-005     0.20000000     0.54401464   -1.7700E-005 q1H~ |1  
Change in Focus                :       0.000000                            0.000000 :MK=h;5Z  
Decenter Y tolerance on surfaces 1 through 3 R_7 6W&  
TEDY   1   3        -0.20000000     0.54401464   -1.7700E-005     0.20000000     0.54401464   -1.7700E-005 i[PvDv"n  
Change in Focus                :       0.000000                            0.000000 o\&~CW~@~  
Tilt X tolerance on surfaces 1 through 3 (degrees) C9o$9 l+B  
TETX   1   3        -0.20000000     0.54897548     0.00494314     0.20000000     0.54897548     0.00494314 WPtMds4  
Change in Focus                :       0.000000                            0.000000 Og=[4?Kpk  
Tilt Y tolerance on surfaces 1 through 3 (degrees) {wcO[bN  
TETY   1   3        -0.20000000     0.54897548     0.00494314     0.20000000     0.54897548     0.00494314 J6DnPaw-G  
Change in Focus                :       0.000000                            0.000000 FtN}]@F  
Decenter X tolerance on surface 1 :"VujvFX  
TSDX   1            -0.20000000     0.53999563    -0.00403671     0.20000000     0.53999563    -0.00403671 6eM6[  
Change in Focus                :       0.000000                            0.000000 z*RSMfRW  
Decenter Y tolerance on surface 1 c!mG1lwD.  
TSDY   1            -0.20000000     0.53999563    -0.00403671     0.20000000     0.53999563    -0.00403671 <8f(eP\*F  
Change in Focus                :       0.000000                            0.000000 >'N!dM.+9  
Tilt X tolerance on surface (degrees) 1 {H+?z<BF<  
TSTX   1            -0.20000000     0.42678383    -0.11724851     0.20000000     0.42678383    -0.11724851 y86
))  
Change in Focus                :       0.000000                            0.000000 ("OAPr\2dw  
Tilt Y tolerance on surface (degrees) 1 Ey'J]KVW  
TSTY   1            -0.20000000     0.42678383    -0.11724851     0.20000000     0.42678383    -0.11724851 I'dj.  
Change in Focus                :       0.000000                            0.000000 <>]1Y$^Y
 
Decenter X tolerance on surface 2 _AprkI_  
TSDX   2            -0.20000000     0.51705427    -0.02697807     0.20000000     0.51705427    -0.02697807 8`*`nQhWa  
Change in Focus                :       0.000000                            0.000000 ujx@@N  
Decenter Y tolerance on surface 2 V`[P4k+b   
TSDY   2            -0.20000000     0.51705427    -0.02697807     0.20000000     0.51705427    -0.02697807 kffZElV  
Change in Focus                :       0.000000                            0.000000 ,7<DGI_y  
Tilt X tolerance on surface (degrees) 2 vGMJ^q  
TSTX   2            -0.20000000     0.35349910    -0.19053324     0.20000000     0.35349910    -0.19053324 -3` "E%9  
Change in Focus                :       0.000000                            0.000000 _|X7 n~  
Tilt Y tolerance on surface (degrees) 2 {M[~E|@D  
TSTY   2            -0.20000000     0.35349910    -0.19053324     0.20000000     0.35349910    -0.19053324 R
5~gH6K|  
Change in Focus                :       0.000000                            0.000000 .9OFryo  
Decenter X tolerance on surface 3 #sZIDn J#  
TSDX   3            -0.20000000     0.53419039    -0.00984195     0.20000000     0.53419039    -0.00984195 7lR<@$q  
Change in Focus                :       0.000000                            0.000000 JD
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Decenter Y tolerance on surface 3 2 Kla8  
TSDY   3            -0.20000000     0.53419039    -0.00984195     0.20000000     0.53419039    -0.00984195 \"'
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Change in Focus                :       0.000000                            0.000000 b~*i91)\  
Tilt X tolerance on surface (degrees) 3 qi&D+~Gv!  
TSTX   3            -0.20000000     0.42861670    -0.11541563     0.20000000     0.42861670    -0.11541563 ZjS(ad*.2  
Change in Focus                :       0.000000                            0.000000 srK53vKMHW  
Tilt Y tolerance on surface (degrees) 3 IM=+3W;ak  
TSTY   3            -0.20000000     0.42861670    -0.11541563     0.20000000     0.42861670    -0.11541563 x#mtS-sw2Q  
Change in Focus                :       0.000000                            0.000000 )&,K94  
Irregularity of surface 1 in fringes N xFUO0O3  
TIRR   1            -0.20000000     0.50973587    -0.03429647     0.20000000     0.57333868     0.02930634 1[s0Lz  
Change in Focus                :       0.000000                            0.000000 g_vm&~U/'  
Irregularity of surface 2 in fringes Tm_8<$ 7  
TIRR   2            -0.20000000     0.53400904    -0.01002330     0.20000000     0.55360281     0.00957047 \_9rr6^"  
Change in Focus                :       0.000000                            0.000000 m6i%DE  
Irregularity of surface 3 in fringes pv&^D,H,  
TIRR   3            -0.20000000     0.58078982     0.03675748     0.20000000     0.49904394    -0.04498840 &\^rQi/tf  
Change in Focus                :       0.000000                            0.000000 3fp> 4;ym'  
Index tolerance on surface 1 HxIoA  
TIND   1            -0.00100000     0.52606778    -0.01796456     0.00100000     0.56121811     0.01718578 3cixQzb}u  
Change in Focus                :       0.000000                            0.000000 nvt$F%+  
Index tolerance on surface 2 TF\sP8>V  
TIND   2            -0.00100000     0.55639086     0.01235852     0.00100000     0.53126361    -0.01276872 W Y:s gG  
Change in Focus                :       0.000000                           -0.000000 "r..  
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Worst offenders: Y@%`ZPJ  
Type                      Value      Criterion        Change K&dT(U  
TSTY   2            -0.20000000     0.35349910    -0.19053324 NAJVr}4f  
TSTY   2             0.20000000     0.35349910    -0.19053324 h/K@IAd  
TSTX   2            -0.20000000     0.35349910    -0.19053324 }Eh*xOta  
TSTX   2             0.20000000     0.35349910    -0.19053324
-zKxf@"  
TSTY   1            -0.20000000     0.42678383    -0.11724851 =EpJZt  
TSTY   1             0.20000000     0.42678383    -0.11724851 7$7n71o  
TSTX   1            -0.20000000     0.42678383    -0.11724851 ?Ht=[l=  
TSTX   1             0.20000000     0.42678383    -0.11724851 \|t{e8}  
TSTY   3            -0.20000000     0.42861670    -0.11541563 7W|Zq6pi  
TSTY   3             0.20000000     0.42861670    -0.11541563 smup,RNZRX  
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Estimated Performance Changes based upon Root-Sum-Square method:
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Nominal MTF                 :     0.54403234 0 iRR{a<  
Estimated change            :    -0.36299231 Qqq <e  
Estimated MTF               :     0.18104003 V!&P(YO:  
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Compensator Statistics: g
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Change in back focus: 3sbK7,4  
Minimum            :        -0.000000 n8u*JeN  
Maximum            :         0.000000 3?`"  
Mean               :        -0.000000 7
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Standard Deviation :         0.000000 Jhy(x1%  
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Monte Carlo Analysis: "U8S81'  
Number of trials: 20 ; )llt G  
af'@h:  
Initial Statistics: Normal Distribution m@\ZHbq  
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  Trial       Criterion        Change Gx'TkU=  
      1     0.42804416    -0.11598818 l r~gG3  
Change in Focus                :      -0.400171 @;Y~frT  
      2     0.54384387    -0.00018847 o`6|ba  
Change in Focus                :       1.018470 cj g.lzYH  
      3     0.44510003    -0.09893230 Vz"u>BP3~  
Change in Focus                :      -0.601922 /;oqf4MF  
      4     0.18154684    -0.36248550 8\Hr5FqB(  
Change in Focus                :       0.920681 ST;t, D:  
      5     0.28665820    -0.25737414 !#}7{  
Change in Focus                :       1.253875 wa:0X)KC
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      6     0.21263372    -0.33139862 1*UNsEr  
Change in Focus                :      -0.903878 4!%F\c46  
      7     0.40051424    -0.14351809 d8OL!Rk  
Change in Focus                :      -1.354815
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      8     0.48754161    -0.05649072 DWm SC}{.  
Change in Focus                :       0.215922 XUmR{A  
      9     0.40357468    -0.14045766 d,9`<1{9  
Change in Focus                :       0.281783 >EP(~G3u  
     10     0.26315315    -0.28087919 |B^G:7c  
Change in Focus                :      -1.048393 E\th%q,mG  
     11     0.26120585    -0.28282649 lZWX7FO'  
Change in Focus                :       1.017611 L*]0"E  
     12     0.24033815    -0.30369419 vAi$[p*im  
Change in Focus                :      -0.109292 P8I*dvu _  
     13     0.37164046    -0.17239188 >/^#Drwb!i  
Change in Focus                :      -0.692430 \40YGFO  
     14     0.48597489    -0.05805744 c/aup  
Change in Focus                :      -0.662040
0rE(p2  
     15     0.21462327    -0.32940907 )/|6'L-2  
Change in Focus                :       1.611296 Vrp[r *V@E  
     16     0.43378226    -0.11025008 g^~Kze  
Change in Focus                :      -0.640081 
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     17     0.39321881    -0.15081353 W?XizTW  
Change in Focus                :       0.914906 7r 0,> 3"  
     18     0.20692530    -0.33710703 z" QJhCh7  
Change in Focus                :       0.801607 ig_2={Q@  
     19     0.51374068    -0.03029165 11UB4CA  
Change in Focus                :       0.947293 kXc25y'blP  
     20     0.38013374    -0.16389860 EKZVF`L  
Change in Focus                :       0.667010 Z|*!y]W
e  
vkcRm`.  
Number of traceable Monte Carlo files generated: 20 n(vDytrj;  
\2kPq>hu  
Nominal     0.54403234 B'weok  
Best        0.54384387    Trial     2 !GK$
[9  
Worst       0.18154684    Trial     4 r\M9_s8  
Mean        0.35770970 ]v29 Rx  
Std Dev     0.11156454 " I
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=f7r69I"  
,mFsM!|  
Compensator Statistics: ;4#D,zlO^  
Change in back focus: 3,eIB(  
Minimum            :        -1.354815 [L~@uAMw:  
Maximum            :         1.611296 0$P/jt  
Mean               :         0.161872 #kmh:P  
Standard Deviation :         0.869664 lU2c_4  
d- E4~)Qy  
90% >       0.20977951               oC|WBS  
80% >       0.22748071               E]} n(  
50% >       0.38667627               C>QIrZu
  
20% >       0.46553746               &KC!*}<tx  
10% >       0.50064115                SpSnoVI  
{]}s#vvy  
End of Run. rOfK~g,X  
W WG /k17  
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 T-" I9kM  

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 -9Ws=r0R  
wts:65~  
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                 15H6:_+=0  
80% >       0.22748071                 ~Pf5ORoe  
50% >       0.38667627                 `)>7)={  
20% >       0.46553746                 6vy7l(%  
10% >       0.50064115 x5si70BKC/  
%@J1]E;  
最后这个数值是MTF值呢，还是MTF的公差？ ]F*3"y?)2  
i76 Yo5  
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？？？   c+' =hR[  
oR#:NtX
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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  : dWRrG-'  
90% >       0.20977951                 7YIK9edP  
80% >       0.22748071                 M~T.n)x2  
50% >       0.38667627                 {==pZpyyh  
20% >       0.46553746                 i^z`"3#LE  
10% >       0.50064115 B)SLG]72f  
....... }qPhx6nP  

j0-McLc  
x<(b|2qf  
这些数值都是MTF值

Criterion           : Geometric MTF average S&T at 30.0000 cycles per mm   Sq]
pQ8  
Mode                : Sensitivities <_S@6?  
Sampling            : 2 %"3 )TN4  
Nominal Criterion   : 0.54403234 H
. ,;-  
Test Wavelength     : 0.6328 | FM }  
#} ,x @]
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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？ &]p}+{ (>  
8^ep/b&|  
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