[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 P,={ C6*  
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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 9;`E,w  
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图片:2.jpg

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然后运行分析的结果如下： b+e9Pi*\  
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Analysis of Tolerances 0^>b=a  
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File : E:\光学设计资料\zemax练习\f500.ZMX bSj-xxB]e  
Title: }ISc^W) t  
Date : TUE JUN 21 2011 ytyB:# J  
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Units are Millimeters. pra0:oHN  
All changes are computed using linear differences. a

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(svKq(X  
Paraxial Focus compensation only. vMeB2r<  
}5]7lGR  
WARNING: Solves should be removed prior to tolerancing. M992XXd  
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Mnemonics: JXF0}T)C  
TFRN: Tolerance on curvature in fringes. L^xh5{  
TTHI: Tolerance on thickness. _DLELcH Y  
TSDX: Tolerance on surface decentering in x. -xL^UcG0  
TSDY: Tolerance on surface decentering in y. s%i \z }/  
TSTX: Tolerance on surface tilt in x (degrees). v^3s?VD  
TSTY: Tolerance on surface tilt in y (degrees). f:KZP;/[c  
TIRR: Tolerance on irregularity (fringes). %abc-q  
TIND: Tolerance on Nd index of refraction.
$tB `dDj  
TEDX: Tolerance on element decentering in x. XS=f>e1<W  
TEDY: Tolerance on element decentering in y. 6d/1PGB  
TETX: Tolerance on element tilt in x (degrees). U%rq(`;  
TETY: Tolerance on element tilt in y (degrees). Fuy"JmeR  
=[nuesP'  
WARNING: RAY AIMING IS OFF. Very loose tolerances may not be computed accurately. &.[I}KH|B  
=2e{T J/  
WARNING: Boundary constraints on compensators will be ignored. <ZjT4><  
vE&K!k`  
Criterion           : Geometric MTF average S&T at 30.0000 cycles per mm =buarxk  
Mode                : Sensitivities rk &ME#<r  
Sampling            : 2 V)A7q9Bum  
Nominal Criterion   : 0.54403234 rr]-$]Q  
Test Wavelength     : 0.6328 U88gJ[$  
TW-^C;   
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Fields: XY Symmetric Angle in degrees 1'f&  
#      X-Field      Y-Field       Weight    VDX    VDY    VCX    VCY ;L[N.ZY!  
1   0.000E+000   0.000E+000   1.000E+000  0.000  0.000  0.000  0.000 TGHyBPJb  
)>,ndKT~  
Sensitivity Analysis: H @5dj}  
VWrb`p@  
                 |----------------- Minimum ----------------| |----------------- Maximum ----------------| W#kd[Wi  
Type                      Value      Criterion        Change          Value      Criterion        Change HsKq/Oyk  
Fringe tolerance on surface 1 5Zn:$?7  
TFRN   1            -1.00000000     0.54257256    -0.00145977     1.00000000     0.54548607     0.00145374 m\G
45%m  
Change in Focus                :      -0.000000                            0.000000 F+)g!NQZ  
Fringe tolerance on surface 2 Egmp8:nZl@  
TFRN   2            -1.00000000     0.54177471    -0.00225762     1.00000000     0.54627463     0.00224230 B["jndyr  
Change in Focus                :       0.000000                            0.000000 `t3w|%La}  
Fringe tolerance on surface 3 & tjL*/  
TFRN   3            -1.00000000     0.54779866     0.00376632     1.00000000     0.54022572    -0.00380662 lQ&J2H<
w  
Change in Focus                :      -0.000000                            0.000000 p# JPLCs  
Thickness tolerance on surface 1 Cs2kbG_  
TTHI   1   3        -0.20000000     0.54321462    -0.00081772     0.20000000     0.54484759     0.00081525 1>L8EImx]V  
Change in Focus                :       0.000000                            0.000000 )zkr[;j~`  
Thickness tolerance on surface 2 TeKU/&fkc  
TTHI   2   3        -0.20000000     0.54478712     0.00075478     0.20000000     0.54327558    -0.00075675 E8L\3V4  
Change in Focus                :       0.000000                           -0.000000 {9vMc  
Decenter X tolerance on surfaces 1 through 3 OmlM9cXm^4  
TEDX   1   3        -0.20000000     0.54401464   -1.7700E-005     0.20000000     0.54401464   -1.7700E-005 ;$3e
pP  
Change in Focus                :       0.000000                            0.000000 CbFO9q  
Decenter Y tolerance on surfaces 1 through 3 |_OoD9,M  
TEDY   1   3        -0.20000000     0.54401464   -1.7700E-005     0.20000000     0.54401464   -1.7700E-005 <l5s[  
Change in Focus                :       0.000000                            0.000000 )M*Sg?L  
Tilt X tolerance on surfaces 1 through 3 (degrees) 9r>iP L2H  
TETX   1   3        -0.20000000     0.54897548     0.00494314     0.20000000     0.54897548     0.00494314 'LYN{  
Change in Focus                :       0.000000                            0.000000 !uP8powO  
Tilt Y tolerance on surfaces 1 through 3 (degrees) :9f 9Z7M  
TETY   1   3        -0.20000000     0.54897548     0.00494314     0.20000000     0.54897548     0.00494314 Pq1j  
Change in Focus                :       0.000000                            0.000000 b9VI(s>  
Decenter X tolerance on surface 1 .EZ8yJj1Q  
TSDX   1            -0.20000000     0.53999563    -0.00403671     0.20000000     0.53999563    -0.00403671 +/ ?oyC+Z  
Change in Focus                :       0.000000                            0.000000 1dOB|  
Decenter Y tolerance on surface 1 `jec|i@oO  
TSDY   1            -0.20000000     0.53999563    -0.00403671     0.20000000     0.53999563    -0.00403671 .|@2Uf  
Change in Focus                :       0.000000                            0.000000 @H}{?-XyA  
Tilt X tolerance on surface (degrees) 1 6Ev+!!znu  
TSTX   1            -0.20000000     0.42678383    -0.11724851     0.20000000     0.42678383    -0.11724851 m -0}Pe9L  
Change in Focus                :       0.000000                            0.000000 9Zr6 KA{  
Tilt Y tolerance on surface (degrees) 1 x"A\Z-xxz  
TSTY   1            -0.20000000     0.42678383    -0.11724851     0.20000000     0.42678383    -0.11724851 KQ ^E\,@o  
Change in Focus                :       0.000000                            0.000000 4lI&y<F  
Decenter X tolerance on surface 2 LI>Bl  
TSDX   2            -0.20000000     0.51705427    -0.02697807     0.20000000     0.51705427    -0.02697807 ^UBzX;|p  
Change in Focus                :       0.000000                            0.000000 a:s$[+'Y  
Decenter Y tolerance on surface 2 =.l>Uw!  
TSDY   2            -0.20000000     0.51705427    -0.02697807     0.20000000     0.51705427    -0.02697807 2 ,krVb?<  
Change in Focus                :       0.000000                            0.000000 >sQf{uL  
Tilt X tolerance on surface (degrees) 2 qe/5'dw  
TSTX   2            -0.20000000     0.35349910    -0.19053324     0.20000000     0.35349910    -0.19053324 N'0nt]&a  
Change in Focus                :       0.000000                            0.000000 vhzz(UPUt  
Tilt Y tolerance on surface (degrees) 2 $."Fz x  
TSTY   2            -0.20000000     0.35349910    -0.19053324     0.20000000     0.35349910    -0.19053324 <) -]'@*c  
Change in Focus                :       0.000000                            0.000000 hqV_MeHv'  
Decenter X tolerance on surface 3 !&5|:96o  
TSDX   3            -0.20000000     0.53419039    -0.00984195     0.20000000     0.53419039    -0.00984195 [AYJ(H/  
Change in Focus                :       0.000000                            0.000000 Gn4XVzB`O  
Decenter Y tolerance on surface 3 `Om W#\  
TSDY   3            -0.20000000     0.53419039    -0.00984195     0.20000000     0.53419039    -0.00984195 _o&NbDH  
Change in Focus                :       0.000000                            0.000000 @2`nBtk  
Tilt X tolerance on surface (degrees) 3 %v
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TSTX   3            -0.20000000     0.42861670    -0.11541563     0.20000000     0.42861670    -0.11541563 jI~$iDdOfs  
Change in Focus                :       0.000000                            0.000000 .g94|P  
Tilt Y tolerance on surface (degrees) 3 goNDS5}  
TSTY   3            -0.20000000     0.42861670    -0.11541563     0.20000000     0.42861670    -0.11541563 >8&fFq  
Change in Focus                :       0.000000                            0.000000 n8JM 0 U-  
Irregularity of surface 1 in fringes 9*XT|B  
TIRR   1            -0.20000000     0.50973587    -0.03429647     0.20000000     0.57333868     0.02930634 C3~O6<,Jh  
Change in Focus                :       0.000000                            0.000000 FGeKhA 8jT  
Irregularity of surface 2 in fringes {REGoe=W%  
TIRR   2            -0.20000000     0.53400904    -0.01002330     0.20000000     0.55360281     0.00957047 h-
x~:$Z,  
Change in Focus                :       0.000000                            0.000000 ,eSpt#M  
Irregularity of surface 3 in fringes -j
1]H"-  
TIRR   3            -0.20000000     0.58078982     0.03675748     0.20000000     0.49904394    -0.04498840 Yp\Y]pym  
Change in Focus                :       0.000000                            0.000000 qRz /$|.  
Index tolerance on surface 1 A\v53AT  
TIND   1            -0.00100000     0.52606778    -0.01796456     0.00100000     0.56121811     0.01718578 olKM0K  
Change in Focus                :       0.000000                            0.000000 /m i&7C(6  
Index tolerance on surface 2 PEaZ3{-  
TIND   2            -0.00100000     0.55639086     0.01235852     0.00100000     0.53126361    -0.01276872 Oz
R<jCOS  
Change in Focus                :       0.000000                           -0.000000 Cxe(iwa.
 
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Worst offenders: #99=wn  
Type                      Value      Criterion        Change 6PC?*^v  
TSTY   2            -0.20000000     0.35349910    -0.19053324 d. ZfK  
TSTY   2             0.20000000     0.35349910    -0.19053324 "p+JME(  
TSTX   2            -0.20000000     0.35349910    -0.19053324 o_5[}d  
TSTX   2             0.20000000     0.35349910    -0.19053324 =J]M#6N0  
TSTY   1            -0.20000000     0.42678383    -0.11724851 Z$%!H7w  
TSTY   1             0.20000000     0.42678383    -0.11724851 /%)(Uz  
TSTX   1            -0.20000000     0.42678383    -0.11724851 1H-~+lf  
TSTX   1             0.20000000     0.42678383    -0.11724851 Ggy?5N7P  
TSTY   3            -0.20000000     0.42861670    -0.11541563 lXEnm-_  
TSTY   3             0.20000000     0.42861670    -0.11541563 mHa~c(x  
_xBhMu2f  
Estimated Performance Changes based upon Root-Sum-Square method: BB_(!omq[  
Nominal MTF                 :     0.54403234 ~Q5]?ZNX  
Estimated change            :    -0.36299231 c=
?Tu  
Estimated MTF               :     0.18104003 d= ?lPEzSA  
r%NzKPW'  
Compensator Statistics: F`,Hf Cb\  
Change in back focus: =#A/d`2 b  
Minimum            :        -0.000000 y\[q2M<  
Maximum            :         0.000000 U* uMMb}$  
Mean               :        -0.000000 |C5{[ z  
Standard Deviation :         0.000000 8VuLL<\|  
3o"l sly  
Monte Carlo Analysis: ej1WkaR8  
Number of trials: 20 S~&
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[;o>q;75Jz  
Initial Statistics: Normal Distribution m\E=I5*/  
CrG!8}  
  Trial       Criterion        Change P% 8U  
      1     0.42804416    -0.11598818 Z`|\%D%  
Change in Focus                :      -0.400171 q(4Ny<=,'K  
      2     0.54384387    -0.00018847 ]z
| 2  
Change in Focus                :       1.018470 J6ed  
      3     0.44510003    -0.09893230 hZ.](rD  
Change in Focus                :      -0.601922 TtQd#mSI\  
      4     0.18154684    -0.36248550 PO^#G@  
Change in Focus                :       0.920681 Zq H-]?)  
      5     0.28665820    -0.25737414 [xQ.qZ[h&  
Change in Focus                :       1.253875 66$hdT$  
      6     0.21263372    -0.33139862 ?6L8#"=  
Change in Focus                :      -0.903878 O1+yOef"k  
      7     0.40051424    -0.14351809 Xq"Es  
Change in Focus                :      -1.354815 8Qj1%Ri:U  
      8     0.48754161    -0.05649072 8@|{n`n]  
Change in Focus                :       0.215922 2=%]Ax"R  
      9     0.40357468    -0.14045766 `B,R+==G:  
Change in Focus                :       0.281783 mS49l  
     10     0.26315315    -0.28087919 -KfMKN~  
Change in Focus                :      -1.048393 IWI$@dng6  
     11     0.26120585    -0.28282649 z46Sh&+  
Change in Focus                :       1.017611 oq b(w+<  
     12     0.24033815    -0.30369419 !lA~;F  
Change in Focus                :      -0.109292 U-U(_W5&  
     13     0.37164046    -0.17239188 Vu
N#j<H  
Change in Focus                :      -0.692430 hzpl;Mj  
     14     0.48597489    -0.05805744 NLUO{'uUW  
Change in Focus                :      -0.662040 fu-,<m{  
     15     0.21462327    -0.32940907 Y"nz l]T  
Change in Focus                :       1.611296 J4 U]_|  
     16     0.43378226    -0.11025008 M a3}w-=;  
Change in Focus                :      -0.640081 3II*NANeg  
     17     0.39321881    -0.15081353 Z|)1ftcC  
Change in Focus                :       0.914906 c>Ri6=C  
     18     0.20692530    -0.33710703 Nus]]Iy-g  
Change in Focus                :       0.801607 bfpoX,:   
     19     0.51374068    -0.03029165 )n[=)"rf  
Change in Focus                :       0.947293 (m=1yj9  
     20     0.38013374    -0.16389860 U!E}(9 tb
 
Change in Focus                :       0.667010 _::ssnG3jT  
Der'45]*^  
Number of traceable Monte Carlo files generated: 20 v yt|x5  
@=Dc(5`[  
Nominal     0.54403234 ,p!IFS`  
Best        0.54384387    Trial     2 P^U.VXY}  
Worst       0.18154684    Trial     4 ,4B8?0sH|  
Mean        0.35770970 BWB}bq  
Std Dev     0.11156454 E]S:F3  
kpNp}b8']  
cmq4w&x/  
Compensator Statistics: Y]5MM:mI  
Change in back focus: 1s(i\&B  
Minimum            :        -1.354815 0O-"tP8o  
Maximum            :         1.611296 qG9j}[d'  
Mean               :         0.161872 Vl>KeZ+  
Standard Deviation :         0.869664 "5?1S-Vl  
02,.UqCz  
90% >       0.20977951               E}<i?;  
80% >       0.22748071               C@<gCMj,"  
50% >       0.38667627               ] ;CJ6gM~  
20% >       0.46553746               '/AX'U8Y  
10% >       0.50064115                ~k}O"{ y  
<Of-,PcCV  
End of Run. x"cB8bZ!$  
FJxb!-0&  
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 G)_Zls2;  

图片:3.JPG

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8U4In[4  
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 2iO{*cB
 
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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                 
#uCfXJ-  
80% >       0.22748071                 oJ/=&c  
50% >       0.38667627                 -%{+\x2  
20% >       0.46553746                 @U1t~f^  
10% >       0.50064115 9
>`dB  
*~b~y7C  
最后这个数值是MTF值呢，还是MTF的公差？ )ZFc5m^+u  
{ 9\/aXPS  
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？？？   9RkNRB)8  
xe3Jxo!U  
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  : Lc "{eP
Fh  
90% >       0.20977951                 vu*9(t)EC  
80% >       0.22748071                 eiRVw5g  
50% >       0.38667627                 \nL@P6X  
20% >       0.46553746                 IMpL+W.  
10% >       0.50064115 QXEZ?gx  
....... |W&K@g$  

rL?{+S]&^)  
n3 Rf:j^R  
这些数值都是MTF值

Criterion           : Geometric MTF average S&T at 30.0000 cycles per mm   '] _7Xa'  
Mode                : Sensitivities r'XWt]B+[  
Sampling            : 2 Qk@BM  
Nominal Criterion   : 0.54403234 s9fEx-!y  
Test Wavelength     : 0.6328 4FKgp|Y0  
%%h.`p1  
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？ [g+WL\1  
#ZHKq7  
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