[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 VbjFQ@[l!  
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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 a/ZfPl0Ns[  
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图片:2.jpg

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然后运行分析的结果如下： *sTQ9 Kr  
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Analysis of Tolerances &Lw| t_y  
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File : E:\光学设计资料\zemax练习\f500.ZMX
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Title: 8c9_=8vw  
Date : TUE JUN 21 2011 :MVD83?4  
8Y9mB#X  
Units are Millimeters. TsQMwV_h  
All changes are computed using linear differences. G>Q{[m$  
7>nA;F 8_  
Paraxial Focus compensation only. 6=
 
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WARNING: Solves should be removed prior to tolerancing. S%4K-I  
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Mnemonics: 6Z$T&Ul{  
TFRN: Tolerance on curvature in fringes. ,Y*f]  
TTHI: Tolerance on thickness. Y9WH%  
TSDX: Tolerance on surface decentering in x. e\89;)  
TSDY: Tolerance on surface decentering in y. C}!|K0t?
 
TSTX: Tolerance on surface tilt in x (degrees). 7G/"!ePW6`  
TSTY: Tolerance on surface tilt in y (degrees). 
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TIRR: Tolerance on irregularity (fringes). ,MLPVDN*D  
TIND: Tolerance on Nd index of refraction. R:E`  
TEDX: Tolerance on element decentering in x. $j:0*Z=>  
TEDY: Tolerance on element decentering in y. it.l;L_nW  
TETX: Tolerance on element tilt in x (degrees). V{n
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TETY: Tolerance on element tilt in y (degrees). dG| iA]  
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WARNING: RAY AIMING IS OFF. Very loose tolerances may not be computed accurately. &(K*TB|Om  
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WARNING: Boundary constraints on compensators will be ignored. 7(jt:V6V  
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Criterion           : Geometric MTF average S&T at 30.0000 cycles per mm ' o5,P/6  
Mode                : Sensitivities .JzO f[g5  
Sampling            : 2 .(sT?M`\J  
Nominal Criterion   : 0.54403234 lY~xoHT;[  
Test Wavelength     : 0.6328 \
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=q._Qsj?fu  
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Fields: XY Symmetric Angle in degrees eq"~by[Uq  
#      X-Field      Y-Field       Weight    VDX    VDY    VCX    VCY 9+L! A  
1   0.000E+000   0.000E+000   1.000E+000  0.000  0.000  0.000  0.000 os>|LPv4  
d.{RZq2cp  
Sensitivity Analysis: A81kb  
X\h]N  
                 |----------------- Minimum ----------------| |----------------- Maximum ----------------| MW p^.  
Type                      Value      Criterion        Change          Value      Criterion        Change 4[6A~iC_  
Fringe tolerance on surface 1
"8-]6p3u  
TFRN   1            -1.00000000     0.54257256    -0.00145977     1.00000000     0.54548607     0.00145374 9 Hm!B )Y  
Change in Focus                :      -0.000000                            0.000000 TPkm~>zD.  
Fringe tolerance on surface 2 ;a68>5Lm*  
TFRN   2            -1.00000000     0.54177471    -0.00225762     1.00000000     0.54627463     0.00224230 s?=J#WV1y  
Change in Focus                :       0.000000                            0.000000 XpM#0hm  
Fringe tolerance on surface 3 ?J>^
X-z  
TFRN   3            -1.00000000     0.54779866     0.00376632     1.00000000     0.54022572    -0.00380662 Xdjxt?*  
Change in Focus                :      -0.000000                            0.000000 )q#b^( v  
Thickness tolerance on surface 1 }g3)z%Xe'[  
TTHI   1   3        -0.20000000     0.54321462    -0.00081772     0.20000000     0.54484759     0.00081525 I3SLR  
Change in Focus                :       0.000000                            0.000000 K$rH{dUM  
Thickness tolerance on surface 2 <uA|nYpp  
TTHI   2   3        -0.20000000     0.54478712     0.00075478     0.20000000     0.54327558    -0.00075675 r:u5+A  
Change in Focus                :       0.000000                           -0.000000 rtY0?  
Decenter X tolerance on surfaces 1 through 3 A}$A~g5Ap  
TEDX   1   3        -0.20000000     0.54401464   -1.7700E-005     0.20000000     0.54401464   -1.7700E-005 GwpJxiFgk  
Change in Focus                :       0.000000                            0.000000 (ttO O45  
Decenter Y tolerance on surfaces 1 through 3 _$1W:!f4  
TEDY   1   3        -0.20000000     0.54401464   -1.7700E-005     0.20000000     0.54401464   -1.7700E-005 /P,J);Y  
Change in Focus                :       0.000000                            0.000000 /9[nogP  
Tilt X tolerance on surfaces 1 through 3 (degrees) ecr pv+  
TETX   1   3        -0.20000000     0.54897548     0.00494314     0.20000000     0.54897548     0.00494314 [u~#F,_ow  
Change in Focus                :       0.000000                            0.000000 B=9|g1e  
Tilt Y tolerance on surfaces 1 through 3 (degrees) ')go/y`YK  
TETY   1   3        -0.20000000     0.54897548     0.00494314     0.20000000     0.54897548     0.00494314 ,cpPXcz?,  
Change in Focus                :       0.000000                            0.000000 YncY_Hu  
Decenter X tolerance on surface 1 lGs fs(  
TSDX   1            -0.20000000     0.53999563    -0.00403671     0.20000000     0.53999563    -0.00403671 8TuOf(qE  
Change in Focus                :       0.000000                            0.000000 #.) qQ8*(  
Decenter Y tolerance on surface 1 7XdLZ4ub  
TSDY   1            -0.20000000     0.53999563    -0.00403671     0.20000000     0.53999563    -0.00403671 u+S
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Change in Focus                :       0.000000                            0.000000 *!Xhy87%Z)  
Tilt X tolerance on surface (degrees) 1 ]F-{)j  
TSTX   1            -0.20000000     0.42678383    -0.11724851     0.20000000     0.42678383    -0.11724851 h(>4%hF  
Change in Focus                :       0.000000                            0.000000 r]2}S=[  
Tilt Y tolerance on surface (degrees) 1 lB,.TK  
TSTY   1            -0.20000000     0.42678383    -0.11724851     0.20000000     0.42678383    -0.11724851 [t,7H  
Change in Focus                :       0.000000                            0.000000 Nmp1[/{J  
Decenter X tolerance on surface 2 X1$0'usS  
TSDX   2            -0.20000000     0.51705427    -0.02697807     0.20000000     0.51705427    -0.02697807 i5|!MIY  
Change in Focus                :       0.000000                            0.000000 KbSIKj  
Decenter Y tolerance on surface 2 BLfoU_Z  
TSDY   2            -0.20000000     0.51705427    -0.02697807     0.20000000     0.51705427    -0.02697807 Cvq2UNz(R  
Change in Focus                :       0.000000                            0.000000 U2!9Tl9".  
Tilt X tolerance on surface (degrees) 2 z$;z&X$
j  
TSTX   2            -0.20000000     0.35349910    -0.19053324     0.20000000     0.35349910    -0.19053324 !x|Ok'izDL  
Change in Focus                :       0.000000                            0.000000 .|cQ0:B[  
Tilt Y tolerance on surface (degrees) 2 ?-J\~AXL  
TSTY   2            -0.20000000     0.35349910    -0.19053324     0.20000000     0.35349910    -0.19053324 Haiuf
)a  
Change in Focus                :       0.000000                            0.000000 @TsOc0?-  
Decenter X tolerance on surface 3 y~;Kf0~  
TSDX   3            -0.20000000     0.53419039    -0.00984195     0.20000000     0.53419039    -0.00984195 HJM-;C](  
Change in Focus                :       0.000000                            0.000000 O']-<E`1k  
Decenter Y tolerance on surface 3 N3i}>Q)B  
TSDY   3            -0.20000000     0.53419039    -0.00984195     0.20000000     0.53419039    -0.00984195 jFnq{Lt  
Change in Focus                :       0.000000                            0.000000 K6_{AuL}4  
Tilt X tolerance on surface (degrees) 3 ~-JkuRJ\  
TSTX   3            -0.20000000     0.42861670    -0.11541563     0.20000000     0.42861670    -0.11541563 `AQv\@wp  
Change in Focus                :       0.000000                            0.000000 Ql!$e
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Tilt Y tolerance on surface (degrees) 3 HBeOK  
TSTY   3            -0.20000000     0.42861670    -0.11541563     0.20000000     0.42861670    -0.11541563 umK~K!i  
Change in Focus                :       0.000000                            0.000000 <SOC  
Irregularity of surface 1 in fringes BY6QJkI9x  
TIRR   1            -0.20000000     0.50973587    -0.03429647     0.20000000     0.57333868     0.02930634 DTPYCG&%  
Change in Focus                :       0.000000                            0.000000 #%Uk}5;-  
Irregularity of surface 2 in fringes sZ7{_}B  
TIRR   2            -0.20000000     0.53400904    -0.01002330     0.20000000     0.55360281     0.00957047 !bS:!Il9=  
Change in Focus                :       0.000000                            0.000000 T/UhZ4(V  
Irregularity of surface 3 in fringes ]xbR:CYJ  
TIRR   3            -0.20000000     0.58078982     0.03675748     0.20000000     0.49904394    -0.04498840 rl[&s\[  
Change in Focus                :       0.000000                            0.000000 g&#.zJ[-  
Index tolerance on surface 1 K6{{\r  
TIND   1            -0.00100000     0.52606778    -0.01796456     0.00100000     0.56121811     0.01718578 z^O>'9#
 
Change in Focus                :       0.000000                            0.000000 vEOoG>'Zq  
Index tolerance on surface 2 >kd&>)9v  
TIND   2            -0.00100000     0.55639086     0.01235852     0.00100000     0.53126361    -0.01276872 &Nt4dp`qj  
Change in Focus                :       0.000000                           -0.000000 S2h?Q$e3  
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Worst offenders: 2/x+7F}w5  
Type                      Value      Criterion        Change s=#3f3  
TSTY   2            -0.20000000     0.35349910    -0.19053324 Zw`Xg@;xP  
TSTY   2             0.20000000     0.35349910    -0.19053324 mn)kd  
TSTX   2            -0.20000000     0.35349910    -0.19053324 C1Slx
!}  
TSTX   2             0.20000000     0.35349910    -0.19053324 vn9_tL&  
TSTY   1            -0.20000000     0.42678383    -0.11724851 ZV$qv=X  
TSTY   1             0.20000000     0.42678383    -0.11724851 sTU`@}}  
TSTX   1            -0.20000000     0.42678383    -0.11724851 *O+
G}_}  
TSTX   1             0.20000000     0.42678383    -0.11724851 Rku9? zf^  
TSTY   3            -0.20000000     0.42861670    -0.11541563 Yu>VW\Fb  
TSTY   3             0.20000000     0.42861670    -0.11541563 bT2b)nf  
XL1v&'HLV  
Estimated Performance Changes based upon Root-Sum-Square method: 49E<`f0  
Nominal MTF                 :     0.54403234 U5[xW  
Estimated change            :    -0.36299231 ^duNEu0*  
Estimated MTF               :     0.18104003 #%rXDGDS  
5^~%10=  
Compensator Statistics: Uo#%f+t  
Change in back focus: BC=U6>`/  
Minimum            :        -0.000000 ri<E[8\  
Maximum            :         0.000000 8A~5@  
Mean               :        -0.000000 )4vZIU#  
Standard Deviation :         0.000000 y+hC !-  
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Monte Carlo Analysis: Es/\/vF7]D  
Number of trials: 20 qM~ev E$%  
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Initial Statistics: Normal Distribution Fc%@
  
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  Trial       Criterion        Change s_}T-%\  
      1     0.42804416    -0.11598818 _@3@_GE  
Change in Focus                :      -0.400171 u[$ \ az7  
      2     0.54384387    -0.00018847
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Change in Focus                :       1.018470 q90eB6G0g  
      3     0.44510003    -0.09893230 Iww.Nd2  
Change in Focus                :      -0.601922 - &Aw]+  
      4     0.18154684    -0.36248550 T0J"Wr>WY  
Change in Focus                :       0.920681 na,j  
      5     0.28665820    -0.25737414 ]([:"j  
Change in Focus                :       1.253875 Hr |De8#f  
      6     0.21263372    -0.33139862 gJ6C&8tl  
Change in Focus                :      -0.903878 j'Z};3y  
      7     0.40051424    -0.14351809 B`3RyM"J@  
Change in Focus                :      -1.354815 _h",,"p#o  
      8     0.48754161    -0.05649072 G%_6"s  
Change in Focus                :       0.215922 #Cks&[!c  
      9     0.40357468    -0.14045766 <2Lcy&w_M  
Change in Focus                :       0.281783 Z6F>SL  
     10     0.26315315    -0.28087919 0*o)k6?q3  
Change in Focus                :      -1.048393 c%9wI*l  
     11     0.26120585    -0.28282649
k\W%^Z  
Change in Focus                :       1.017611 ;3wj(o0  
     12     0.24033815    -0.30369419 !r]
elX  
Change in Focus                :      -0.109292 _-$O6eZ  
     13     0.37164046    -0.17239188 ]V\qX+K  
Change in Focus                :      -0.692430 u4*7n-(  
     14     0.48597489    -0.05805744 %T4htZa  
Change in Focus                :      -0.662040 ?9hw]Q6r}  
     15     0.21462327    -0.32940907 /^v?Q9=Y  
Change in Focus                :       1.611296 m`l3@Z  
     16     0.43378226    -0.11025008 E~Eh'>Y(B  
Change in Focus                :      -0.640081 R{uq8NA- W  
     17     0.39321881    -0.15081353 gmkD'CX*A  
Change in Focus                :       0.914906 VDq4n;p1  
     18     0.20692530    -0.33710703 6UOV,`:m+  
Change in Focus                :       0.801607 H-$)@  
     19     0.51374068    -0.03029165 3
)ac   
Change in Focus                :       0.947293 G66A]FIg  
     20     0.38013374    -0.16389860 jsL\{I^>  
Change in Focus                :       0.667010 i
j&_>   
!m)P*Lw  
Number of traceable Monte Carlo files generated: 20 eV$pza  
eq+
t%  
Nominal     0.54403234 4X,fb`  
Best        0.54384387    Trial     2 ckFnQhW  
Worst       0.18154684    Trial     4 h$7rEs  
Mean        0.35770970 ^{\gD23  
Std Dev     0.11156454 PI@/jh  
A??(}F L  
h&d%#6mB  
Compensator Statistics: foY=?mbL  
Change in back focus: aVsA5t\zi  
Minimum            :        -1.354815  Gh;Ju[6  
Maximum            :         1.611296 9i4!^DM_  
Mean               :         0.161872 Pl(+&k`}  
Standard Deviation :         0.869664 IH|PdVNtg  
%HOMX{~}#  
90% >       0.20977951               am;)@<8~Q  
80% >       0.22748071               wT/TQEgz  
50% >       0.38667627               z<2!|  
20% >       0.46553746               ]l\'1-/  
10% >       0.50064115                ^3B)i=  
q2v:lSFY  
End of Run. PR rf$& u  
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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 U(#)[S,  

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 ILdRN  
Us4J[MW<  
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                 k;V4%O  
80% >       0.22748071                 }qUNXE@  
50% >       0.38667627                 bS 'a)  
20% >       0.46553746                 4m++>q  
10% >       0.50064115 .K![<eZ  
75Xi%mlE7  
最后这个数值是MTF值呢，还是MTF的公差？ "cerg?ix  
Q(lj&!?1k  
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？？？   VdpkE0  
?f+w:FO  
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  : KtHh--j`  
90% >       0.20977951                 D0PP   
80% >       0.22748071                 kgK7 T  
50% >       0.38667627                 ]M{SM`Ya  
20% >       0.46553746                 YP~d1BWvf  
10% >       0.50064115 ))!Z2PfD  
....... 5L|yF"TI#  

>8SX,  
[w~teX0!  
这些数值都是MTF值

Criterion           : Geometric MTF average S&T at 30.0000 cycles per mm   Mim 9C]h(  
Mode                : Sensitivities mMrvr9%  
Sampling            : 2 :<ujk  
Nominal Criterion   : 0.54403234 jb)z[!FbM  
Test Wavelength     : 0.6328 *~4uF  
GfQMdLy\Z  
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？ VbBZ\`b  
}'kk}2ej`  
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