[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 t[0gN:s  
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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 [ tmJ6^s  
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图片:2.jpg

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然后运行分析的结果如下： K]Ed-Tz8QZ  
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Analysis of Tolerances Q<Utwk?nL  
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File : E:\光学设计资料\zemax练习\f500.ZMX M(SH3~  
Title: c1!h;(&  
Date : TUE JUN 21 2011 Q>= :$I  
\$GlB+ iCx  
Units are Millimeters. '6[0NuB  
All changes are computed using linear differences. \vojF\  
:C>slxY  
Paraxial Focus compensation only. mWCY%o@  
bi[vs|  
WARNING: Solves should be removed prior to tolerancing. Z*x Q"+
\  
o{nBtxZ"  
Mnemonics: YV 2T$#7u  
TFRN: Tolerance on curvature in fringes. qKZ~)B j  
TTHI: Tolerance on thickness.
ZShRE"`  
TSDX: Tolerance on surface decentering in x. ANi}q9SC  
TSDY: Tolerance on surface decentering in y. ,in`JM<o  
TSTX: Tolerance on surface tilt in x (degrees). $)z(4Ev  
TSTY: Tolerance on surface tilt in y (degrees). jSpmE  
TIRR: Tolerance on irregularity (fringes). <5?.
S{Z9
 
TIND: Tolerance on Nd index of refraction. 3S +.]v>  
TEDX: Tolerance on element decentering in x. MhWmY[  
TEDY: Tolerance on element decentering in y. (4x`/  
TETX: Tolerance on element tilt in x (degrees). oTT/;~I  
TETY: Tolerance on element tilt in y (degrees). "J3@Z,qW  
zc\e$MO  
WARNING: RAY AIMING IS OFF. Very loose tolerances may not be computed accurately. )Q&:$]  
q>o1kTI  
WARNING: Boundary constraints on compensators will be ignored. FdzsWm  
mp>,TOi~s7  
Criterion           : Geometric MTF average S&T at 30.0000 cycles per mm 6# ,2  
Mode                : Sensitivities dI{)^  
Sampling            : 2 $x
#Y\dpS  
Nominal Criterion   : 0.54403234 fg^$F9
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Test Wavelength     : 0.6328 ebp18_a|  
8v5cQ5Lc  

.G4(Ryh  
Fields: XY Symmetric Angle in degrees cZPv6c_w  
#      X-Field      Y-Field       Weight    VDX    VDY    VCX    VCY
?%{v1(  
1   0.000E+000   0.000E+000   1.000E+000  0.000  0.000  0.000  0.000 g
b(a`  
,*wa#[  
Sensitivity Analysis: [N'YFb3"O  
`o)rAD^e  
                 |----------------- Minimum ----------------| |----------------- Maximum ----------------| rAM{<  
Type                      Value      Criterion        Change          Value      Criterion        Change _cQTQ  
Fringe tolerance on surface 1 cxp>4[gH  
TFRN   1            -1.00000000     0.54257256    -0.00145977     1.00000000     0.54548607     0.00145374 6;"jq92in*  
Change in Focus                :      -0.000000                            0.000000 &r;-=ASYzV  
Fringe tolerance on surface 2 )Gh"(]-<  
TFRN   2            -1.00000000     0.54177471    -0.00225762     1.00000000     0.54627463     0.00224230 `XE8[XY  
Change in Focus                :       0.000000                            0.000000 4D0=3Vy  
Fringe tolerance on surface 3 ofC=S$wX  
TFRN   3            -1.00000000     0.54779866     0.00376632     1.00000000     0.54022572    -0.00380662 S[n;u-U  
Change in Focus                :      -0.000000                            0.000000 B_aLqB]U  
Thickness tolerance on surface 1 OB.TAoH:  
TTHI   1   3        -0.20000000     0.54321462    -0.00081772     0.20000000     0.54484759     0.00081525 xi %u)p  
Change in Focus                :       0.000000                            0.000000 ncuqo'r  
Thickness tolerance on surface 2 i<m1^a#C'  
TTHI   2   3        -0.20000000     0.54478712     0.00075478     0.20000000     0.54327558    -0.00075675 a;r,*zZ="  
Change in Focus                :       0.000000                           -0.000000 @6~r7/WD  
Decenter X tolerance on surfaces 1 through 3 &$
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TEDX   1   3        -0.20000000     0.54401464   -1.7700E-005     0.20000000     0.54401464   -1.7700E-005 xRuAt/aC  
Change in Focus                :       0.000000                            0.000000 {r yv7G  
Decenter Y tolerance on surfaces 1 through 3 96fbMP+7R  
TEDY   1   3        -0.20000000     0.54401464   -1.7700E-005     0.20000000     0.54401464   -1.7700E-005 fb0i6RC~&  
Change in Focus                :       0.000000                            0.000000 "eA4JL\%)  
Tilt X tolerance on surfaces 1 through 3 (degrees) yM`J+tq  
TETX   1   3        -0.20000000     0.54897548     0.00494314     0.20000000     0.54897548     0.00494314 PJ5~,4H-4  
Change in Focus                :       0.000000                            0.000000 K-cRNt  
Tilt Y tolerance on surfaces 1 through 3 (degrees) g\[?U9qN  
TETY   1   3        -0.20000000     0.54897548     0.00494314     0.20000000     0.54897548     0.00494314 |:7O  
Change in Focus                :       0.000000                            0.000000 \fj*.[,  
Decenter X tolerance on surface 1 7_xQa$U[  
TSDX   1            -0.20000000     0.53999563    -0.00403671     0.20000000     0.53999563    -0.00403671 7O',X Y  
Change in Focus                :       0.000000                            0.000000 =]X_wA;%  
Decenter Y tolerance on surface 1 e`27 ?  
TSDY   1            -0.20000000     0.53999563    -0.00403671     0.20000000     0.53999563    -0.00403671 0<d9al|J  
Change in Focus                :       0.000000                            0.000000 V+G.TI P  
Tilt X tolerance on surface (degrees) 1 gY9HEfB  
TSTX   1            -0.20000000     0.42678383    -0.11724851     0.20000000     0.42678383    -0.11724851 _r@ FWUZ  
Change in Focus                :       0.000000                            0.000000 He @d~9M  
Tilt Y tolerance on surface (degrees) 1 E4idEQ}H  
TSTY   1            -0.20000000     0.42678383    -0.11724851     0.20000000     0.42678383    -0.11724851 $Y& 8@/L  
Change in Focus                :       0.000000                            0.000000 D"UCe7  
Decenter X tolerance on surface 2 &Azfpv  
TSDX   2            -0.20000000     0.51705427    -0.02697807     0.20000000     0.51705427    -0.02697807 1U[Q)(P  
Change in Focus                :       0.000000                            0.000000 W@Et  
Decenter Y tolerance on surface 2 xn|M]E1)  
TSDY   2            -0.20000000     0.51705427    -0.02697807     0.20000000     0.51705427    -0.02697807 OMgFp|^  
Change in Focus                :       0.000000                            0.000000 $o2H#"  
Tilt X tolerance on surface (degrees) 2 m?G@#[ l  
TSTX   2            -0.20000000     0.35349910    -0.19053324     0.20000000     0.35349910    -0.19053324 .dM4B'OA?  
Change in Focus                :       0.000000                            0.000000 fhp\of/@ R  
Tilt Y tolerance on surface (degrees) 2 >|Yr14?7  
TSTY   2            -0.20000000     0.35349910    -0.19053324     0.20000000     0.35349910    -0.19053324 V9
Z  
Change in Focus                :       0.000000                            0.000000 zmaf@T
 
Decenter X tolerance on surface 3 WD.td  
TSDX   3            -0.20000000     0.53419039    -0.00984195     0.20000000     0.53419039    -0.00984195 'b1k0 9'  
Change in Focus                :       0.000000                            0.000000 >d2U=Yk!  
Decenter Y tolerance on surface 3 *f<+yF{=A  
TSDY   3            -0.20000000     0.53419039    -0.00984195     0.20000000     0.53419039    -0.00984195 Z'=:Bo{  
Change in Focus                :       0.000000                            0.000000 c"F3[mrff  
Tilt X tolerance on surface (degrees) 3 t*J*?Ma  
TSTX   3            -0.20000000     0.42861670    -0.11541563     0.20000000     0.42861670    -0.11541563 "Bn8WT2?  
Change in Focus                :       0.000000                            0.000000 m ioNMDG  
Tilt Y tolerance on surface (degrees) 3 2aj9:S  
TSTY   3            -0.20000000     0.42861670    -0.11541563     0.20000000     0.42861670    -0.11541563 w1>uD]  
Change in Focus                :       0.000000                            0.000000 &gGh%:`B  
Irregularity of surface 1 in fringes 9vX~gh{]~  
TIRR   1            -0.20000000     0.50973587    -0.03429647     0.20000000     0.57333868     0.02930634 A><w1-X&=o  
Change in Focus                :       0.000000                            0.000000 @s7ZfV??  
Irregularity of surface 2 in fringes P?WS=w*O0  
TIRR   2            -0.20000000     0.53400904    -0.01002330     0.20000000     0.55360281     0.00957047 f0!i<9<  
Change in Focus                :       0.000000                            0.000000 !g|)?XWc  
Irregularity of surface 3 in fringes R(.5Hs  
TIRR   3            -0.20000000     0.58078982     0.03675748     0.20000000     0.49904394    -0.04498840 f)'mpp^  
Change in Focus                :       0.000000                            0.000000 ^/c v
8M=  
Index tolerance on surface 1 my1FW,3  
TIND   1            -0.00100000     0.52606778    -0.01796456     0.00100000     0.56121811     0.01718578 K9G1>*  
Change in Focus                :       0.000000                            0.000000 g_8A1lt  
Index tolerance on surface 2 LeP;HP|  
TIND   2            -0.00100000     0.55639086     0.01235852     0.00100000     0.53126361    -0.01276872 ZRCm
'p3  
Change in Focus                :       0.000000                           -0.000000 o,(]w kF  
<?8aM7W7  
Worst offenders: yzI`&? P2  
Type                      Value      Criterion        Change ^qR2!fwm<  
TSTY   2            -0.20000000     0.35349910    -0.19053324 *.F^`]yz  
TSTY   2             0.20000000     0.35349910    -0.19053324 4{zz-4=  
TSTX   2            -0.20000000     0.35349910    -0.19053324 NAg9EaWja{  
TSTX   2             0.20000000     0.35349910    -0.19053324 ;zF3e&e(  
TSTY   1            -0.20000000     0.42678383    -0.11724851 o*5iHa(Qm  
TSTY   1             0.20000000     0.42678383    -0.11724851 E!Ljq3iT`  
TSTX   1            -0.20000000     0.42678383    -0.11724851 A  [c1E[  
TSTX   1             0.20000000     0.42678383    -0.11724851 p<[gzmU9\b  
TSTY   3            -0.20000000     0.42861670    -0.11541563 kMS&"/z  
TSTY   3             0.20000000     0.42861670    -0.11541563 P
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Estimated Performance Changes based upon Root-Sum-Square method: Xg4iH5!E  
Nominal MTF                 :     0.54403234 :o"9x,  
Estimated change            :    -0.36299231 ]0dj##5tJ  
Estimated MTF               :     0.18104003 t@"i/@8x$  
THN//}d  
Compensator Statistics: ,;D$d#\"  
Change in back focus: =%=lq0GF0  
Minimum            :        -0.000000 1U?,}w  
Maximum            :         0.000000 Py72:;wn  
Mean               :        -0.000000 fex<9'e  
Standard Deviation :         0.000000 Bz+zEXBC  
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Monte Carlo Analysis: ojva~mnFf  
Number of trials: 20 _/c1b>kcso  
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Initial Statistics: Normal Distribution aTWC
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xCTPsw]s  
  Trial       Criterion        Change [C-4*qOaa2  
      1     0.42804416    -0.11598818 fFe{oR   
Change in Focus                :      -0.400171 |d)*,O4s  
      2     0.54384387    -0.00018847 ;n\$'"K&;  
Change in Focus                :       1.018470 rWMG6+Scb  
      3     0.44510003    -0.09893230 1-=ZIHW  
Change in Focus                :      -0.601922 Y W9+.Dc`  
      4     0.18154684    -0.36248550 jL6ZHEi#d7  
Change in Focus                :       0.920681 iVSN>APe  
      5     0.28665820    -0.25737414 :5W8S6[o  
Change in Focus                :       1.253875 t@vVE{`  
      6     0.21263372    -0.33139862 G(;hJ'LT  
Change in Focus                :      -0.903878 `qs[a}%'>"  
      7     0.40051424    -0.14351809 qG)M8xk  
Change in Focus                :      -1.354815 qP k`e}D  
      8     0.48754161    -0.05649072 ^0tO2$  
Change in Focus                :       0.215922 7TU(~]Z  
      9     0.40357468    -0.14045766 \?_M_5Nb  
Change in Focus                :       0.281783 e0z(l/UB  
     10     0.26315315    -0.28087919 @{q:179w^  
Change in Focus                :      -1.048393 7cQFH@SC  
     11     0.26120585    -0.28282649 ~W..P:wG5  
Change in Focus                :       1.017611 omoD+  
     12     0.24033815    -0.30369419 .+d.~jHX  
Change in Focus                :      -0.109292 ]#sF pWI[N  
     13     0.37164046    -0.17239188 nRHxbE}::  
Change in Focus                :      -0.692430 =pk5'hBAi  
     14     0.48597489    -0.05805744 +5i~}Q!  
Change in Focus                :      -0.662040 FQh8(^(  
     15     0.21462327    -0.32940907 Z#NEa.]  
Change in Focus                :       1.611296 :9~LY
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     16     0.43378226    -0.11025008  DJJd_  
Change in Focus                :      -0.640081 1@:BUE;jZ  
     17     0.39321881    -0.15081353 ss0`9:z  
Change in Focus                :       0.914906 `k.0d`3(  
     18     0.20692530    -0.33710703 UFzC8  
Change in Focus                :       0.801607 /6{P ?)]pE  
     19     0.51374068    -0.03029165 93VbB[w~7F  
Change in Focus                :       0.947293 OpD%lRl  
     20     0.38013374    -0.16389860 ,CxIA^  
Change in Focus                :       0.667010 @#QaaR;4  
5HC5   
Number of traceable Monte Carlo files generated: 20 RRUv_sff  
"&%Lhyt  
Nominal     0.54403234 wTe 9OFv  
Best        0.54384387    Trial     2 ty\F~]Oo  
Worst       0.18154684    Trial     4 *!r"+?0gN  
Mean        0.35770970 #ZyY(S1.  
Std Dev     0.11156454 nKnQ%R  
5ktFL<^5T  
!O 0{ .k  
Compensator Statistics: J3QL%#  
Change in back focus: :|a$[g5  
Minimum            :        -1.354815 N`J]k B7  
Maximum            :         1.611296 XGb*LY+Db6  
Mean               :         0.161872 4DgH/Yo  
Standard Deviation :         0.869664 {\vcwMUzZ  
D k<NlH zp  
90% >       0.20977951               eq(1'?7]`G  
80% >       0.22748071               hw({>cH\  
50% >       0.38667627               v\2-%  
20% >       0.46553746               QV[#^1  
10% >       0.50064115                $d*PY_  
*X /i<  
End of Run. <nU8.?\?~  
| Di7,$c  
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 cV4]Y(9  

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 %n^ugm0B  
0uu)0:  
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                 h_Ssm{C\  
80% >       0.22748071                 z.|[g$F  
50% >       0.38667627                 pVM1%n:#  
20% >       0.46553746                 :F_>`{  
10% >       0.50064115 rZ&li/Z
 
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最后这个数值是MTF值呢，还是MTF的公差？ LYr9a(  
,Jx.Kj.,  
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？？？   U|<>xe*|%  
A;k#8&;  
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  : k2fJ  
90% >       0.20977951                 S(^YTb7  
80% >       0.22748071                 /q8B | (U  
50% >       0.38667627                 !? H:?  
20% >       0.46553746                 R+!oPWfb  
10% >       0.50064115 5s;@;V  
.......
H=w6  

4>2\{0r  
ThkCKM  
这些数值都是MTF值

Criterion           : Geometric MTF average S&T at 30.0000 cycles per mm   %%I:L~c  
Mode                : Sensitivities >;F}>_i  
Sampling            : 2 J`C 2}$ ~  
Nominal Criterion   : 0.54403234 s&+`>  
Test Wavelength     : 0.6328 dcTZL$  
/|#2ehE  
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？ I[gPW7&S@  
c6=XJvz  
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