[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 hK+Iow-  
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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 ^fLePsmd  
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图片:2.jpg

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然后运行分析的结果如下： d (Fb_  
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Analysis of Tolerances
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File : E:\光学设计资料\zemax练习\f500.ZMX X;7gh>Q'4  
Title: 1Z +3=$P  
Date : TUE JUN 21 2011 *N .f_s  
8"4&IX  
Units are Millimeters. n# %mL<  
All changes are computed using linear differences. gsn3]^X  
$/aZ/O)F  
Paraxial Focus compensation only. Y{TzN%|LV  
X=Q)R1~6v  
WARNING: Solves should be removed prior to tolerancing. F#X&Tb{  
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Mnemonics: coHzbD~#H  
TFRN: Tolerance on curvature in fringes. +s:!\(BM  
TTHI: Tolerance on thickness. "r!O9X6  
TSDX: Tolerance on surface decentering in x. ;/fZh:V2  
TSDY: Tolerance on surface decentering in y. ,%#FK|  
TSTX: Tolerance on surface tilt in x (degrees). 9pKN^FX,76  
TSTY: Tolerance on surface tilt in y (degrees). Bf$YwoZov  
TIRR: Tolerance on irregularity (fringes). WHQg6r  
TIND: Tolerance on Nd index of refraction. )z/+!y  
TEDX: Tolerance on element decentering in x. bb#F2r4  
TEDY: Tolerance on element decentering in y. hBf0kl  
TETX: Tolerance on element tilt in x (degrees). 5Xu2MY=  
TETY: Tolerance on element tilt in y (degrees). I @TR|  
%O`e!p  
WARNING: RAY AIMING IS OFF. Very loose tolerances may not be computed accurately. D9M<>Xz)  
#1i&!et&/  
WARNING: Boundary constraints on compensators will be ignored. %|$h<~  
k/A8|  
Criterion           : Geometric MTF average S&T at 30.0000 cycles per mm @vd
BA hXk  
Mode                : Sensitivities =EI>@Y"  
Sampling            : 2 GsG.9nd  
Nominal Criterion   : 0.54403234 \kU0D  
Test Wavelength     : 0.6328 sK8=PZ\  
>M{=qs  
n`Pwo&  
Fields: XY Symmetric Angle in degrees )$XW~oA'  
#      X-Field      Y-Field       Weight    VDX    VDY    VCX    VCY `0Y`]kSY+  
1   0.000E+000   0.000E+000   1.000E+000  0.000  0.000  0.000  0.000 :DTKZ9>2D  
7U>Xi'?  
Sensitivity Analysis: DT`TA#O  
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                 |----------------- Minimum ----------------| |----------------- Maximum ----------------| C?jk#T  
Type                      Value      Criterion        Change          Value      Criterion        Change MaDdiyeC  
Fringe tolerance on surface 1 &<}vs`W  
TFRN   1            -1.00000000     0.54257256    -0.00145977     1.00000000     0.54548607     0.00145374 j^#4!Ue  
Change in Focus                :      -0.000000                            0.000000 DD`Bl1)  
Fringe tolerance on surface 2 e^)+bmh  
TFRN   2            -1.00000000     0.54177471    -0.00225762     1.00000000     0.54627463     0.00224230 @
sUYjB  
Change in Focus                :       0.000000                            0.000000 T8( \:v
 
Fringe tolerance on surface 3 *Y"Kbn6  
TFRN   3            -1.00000000     0.54779866     0.00376632     1.00000000     0.54022572    -0.00380662 o$]wd*+  
Change in Focus                :      -0.000000                            0.000000 | +osEHC  
Thickness tolerance on surface 1 36mp+}R#  
TTHI   1   3        -0.20000000     0.54321462    -0.00081772     0.20000000     0.54484759     0.00081525 od=%8z  
Change in Focus                :       0.000000                            0.000000 6%bZZTP`  
Thickness tolerance on surface 2 v?e@`;- <  
TTHI   2   3        -0.20000000     0.54478712     0.00075478     0.20000000     0.54327558    -0.00075675 .?T,>#R  
Change in Focus                :       0.000000                           -0.000000 yd#SB)&  
Decenter X tolerance on surfaces 1 through 3 qdkhfm2(K
 
TEDX   1   3        -0.20000000     0.54401464   -1.7700E-005     0.20000000     0.54401464   -1.7700E-005 Vmq:As^a  
Change in Focus                :       0.000000                            0.000000 .J0s_[  
Decenter Y tolerance on surfaces 1 through 3 )Qe<XJH!  
TEDY   1   3        -0.20000000     0.54401464   -1.7700E-005     0.20000000     0.54401464   -1.7700E-005 04ZP\  
Change in Focus                :       0.000000                            0.000000 qxKW%{6o  
Tilt X tolerance on surfaces 1 through 3 (degrees) coa+@g,w7#  
TETX   1   3        -0.20000000     0.54897548     0.00494314     0.20000000     0.54897548     0.00494314 lrqu%:q  
Change in Focus                :       0.000000                            0.000000 72uARF  
Tilt Y tolerance on surfaces 1 through 3 (degrees) a6\0XVU  
TETY   1   3        -0.20000000     0.54897548     0.00494314     0.20000000     0.54897548     0.00494314 ctI
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Change in Focus                :       0.000000                            0.000000 O# n<`;W  
Decenter X tolerance on surface 1 /Kcp9Qx  
TSDX   1            -0.20000000     0.53999563    -0.00403671     0.20000000     0.53999563    -0.00403671 3@#WYvD  
Change in Focus                :       0.000000                            0.000000 }8 V/Cd9  
Decenter Y tolerance on surface 1 gR7in!8  
TSDY   1            -0.20000000     0.53999563    -0.00403671     0.20000000     0.53999563    -0.00403671 \4$V;C/n,  
Change in Focus                :       0.000000                            0.000000 ]fxYSm  
Tilt X tolerance on surface (degrees) 1 []^fb,5a  
TSTX   1            -0.20000000     0.42678383    -0.11724851     0.20000000     0.42678383    -0.11724851 }7?n\I+n"  
Change in Focus                :       0.000000                            0.000000 =PU!hZj"L  
Tilt Y tolerance on surface (degrees) 1 RuyqB>[o  
TSTY   1            -0.20000000     0.42678383    -0.11724851     0.20000000     0.42678383    -0.11724851 CK[w0VCT  
Change in Focus                :       0.000000                            0.000000 C_CUk d[  
Decenter X tolerance on surface 2 '" MT$MrT  
TSDX   2            -0.20000000     0.51705427    -0.02697807     0.20000000     0.51705427    -0.02697807 R( 2,1f=d  
Change in Focus                :       0.000000                            0.000000 vndD#/lXq  
Decenter Y tolerance on surface 2 ;iA6[uz  
TSDY   2            -0.20000000     0.51705427    -0.02697807     0.20000000     0.51705427    -0.02697807 73C7g< Mx  
Change in Focus                :       0.000000                            0.000000 'Cr2& dy  
Tilt X tolerance on surface (degrees) 2 O4`am:@  
TSTX   2            -0.20000000     0.35349910    -0.19053324     0.20000000     0.35349910    -0.19053324 [f
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Change in Focus                :       0.000000                            0.000000 ^@91BY  
Tilt Y tolerance on surface (degrees) 2 fHFy5j0H  
TSTY   2            -0.20000000     0.35349910    -0.19053324     0.20000000     0.35349910    -0.19053324 2TQyQ%  
Change in Focus                :       0.000000                            0.000000 PMOyZ3  
Decenter X tolerance on surface 3 hYvWD.c}  
TSDX   3            -0.20000000     0.53419039    -0.00984195     0.20000000     0.53419039    -0.00984195 \S5YS2,P  
Change in Focus                :       0.000000                            0.000000 {Q?\%4>2  
Decenter Y tolerance on surface 3 }N^3P0XjYq  
TSDY   3            -0.20000000     0.53419039    -0.00984195     0.20000000     0.53419039    -0.00984195 _P].Z
8  
Change in Focus                :       0.000000                            0.000000 \US'tF)/  
Tilt X tolerance on surface (degrees) 3 Z [[AmxE'l  
TSTX   3            -0.20000000     0.42861670    -0.11541563     0.20000000     0.42861670    -0.11541563 Nw3K@Ge  
Change in Focus                :       0.000000                            0.000000 FdwlRuG  
Tilt Y tolerance on surface (degrees) 3 %"yy8~|  
TSTY   3            -0.20000000     0.42861670    -0.11541563     0.20000000     0.42861670    -0.11541563 Hl|EySno  
Change in Focus                :       0.000000                            0.000000 6gy
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Irregularity of surface 1 in fringes xZ=6  
TIRR   1            -0.20000000     0.50973587    -0.03429647     0.20000000     0.57333868     0.02930634 rjaG{ i  
Change in Focus                :       0.000000                            0.000000 bM@8[&ta  
Irregularity of surface 2 in fringes XEX-NE"]  
TIRR   2            -0.20000000     0.53400904    -0.01002330     0.20000000     0.55360281     0.00957047 `4Db( ~
  
Change in Focus                :       0.000000                            0.000000 xZE%Gf_U  
Irregularity of surface 3 in fringes ?z{Z!Bt?=)  
TIRR   3            -0.20000000     0.58078982     0.03675748     0.20000000     0.49904394    -0.04498840 zn+5pn&?  
Change in Focus                :       0.000000                            0.000000 U"T>L  
Index tolerance on surface 1 ,$oz1,Q/  
TIND   1            -0.00100000     0.52606778    -0.01796456     0.00100000     0.56121811     0.01718578 sKCfI]  
Change in Focus                :       0.000000                            0.000000 ]ykMh  
Index tolerance on surface 2 7 'B9z/  
TIND   2            -0.00100000     0.55639086     0.01235852     0.00100000     0.53126361    -0.01276872 sjW;Nsp  
Change in Focus                :       0.000000                           -0.000000 'uBagd>*  
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Worst offenders: +M s`C)f  
Type                      Value      Criterion        Change |V dr/'  
TSTY   2            -0.20000000     0.35349910    -0.19053324 (~U1X
4  
TSTY   2             0.20000000     0.35349910    -0.19053324 h.t2;O,b  
TSTX   2            -0.20000000     0.35349910    -0.19053324 ^630%YO  
TSTX   2             0.20000000     0.35349910    -0.19053324 e$Npo<u  
TSTY   1            -0.20000000     0.42678383    -0.11724851 TBU.%3dEyI  
TSTY   1             0.20000000     0.42678383    -0.11724851 QnMN8Q9  
TSTX   1            -0.20000000     0.42678383    -0.11724851 $`'%1;y@  
TSTX   1             0.20000000     0.42678383    -0.11724851 p E56CM  
TSTY   3            -0.20000000     0.42861670    -0.11541563 IpYw
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TSTY   3             0.20000000     0.42861670    -0.11541563 hsJS(qEh.'  
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Estimated Performance Changes based upon Root-Sum-Square method: (X|`|Y  
Nominal MTF                 :     0.54403234 XEpwk,8*g  
Estimated change            :    -0.36299231 \L]T|]}(  
Estimated MTF               :     0.18104003 u.!<)VIJx  
R=m9[TgBm  
Compensator Statistics: Su>UXuNdE#  
Change in back focus: |]
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Minimum            :        -0.000000 tj<0q<is  
Maximum            :         0.000000 6>e YG<y{  
Mean               :        -0.000000 oc0z1u  
Standard Deviation :         0.000000 
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Monte Carlo Analysis: dt1,!sHn  
Number of trials: 20 <&87aDYz  
IA(+}V  
Initial Statistics: Normal Distribution "v[?`<53^l  
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  Trial       Criterion        Change i9B1/?^W&  
      1     0.42804416    -0.11598818 a";xG,U
 
Change in Focus                :      -0.400171 'i7!"Y6>  
      2     0.54384387    -0.00018847 R)u ${  
Change in Focus                :       1.018470 EwuBL6kN  
      3     0.44510003    -0.09893230
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Change in Focus                :      -0.601922 QVJvuiUh  
      4     0.18154684    -0.36248550 Ng;Fhv
+  
Change in Focus                :       0.920681 1v"r8=Wt  
      5     0.28665820    -0.25737414 4K<T_B/  
Change in Focus                :       1.253875 L\/YS;Y  
      6     0.21263372    -0.33139862 P%^\<#Ya7  
Change in Focus                :      -0.903878 w@Gk#  
      7     0.40051424    -0.14351809 (U@uJ  
Change in Focus                :      -1.354815 63Dm{ 2i}F  
      8     0.48754161    -0.05649072 ^[u*m%UB  
Change in Focus                :       0.215922 otSF8[  
      9     0.40357468    -0.14045766 lk. ;  
Change in Focus                :       0.281783 2Hj;o  
     10     0.26315315    -0.28087919 t1%<l  
Change in Focus                :      -1.048393 > qDHb'  
     11     0.26120585    -0.28282649 %n<.)R  
Change in Focus                :       1.017611 j[q$;uSD  
     12     0.24033815    -0.30369419 !tr /$  
Change in Focus                :      -0.109292 )9mUE*[  
     13     0.37164046    -0.17239188 AfOq?V  
Change in Focus                :      -0.692430 69tT'U3vb$  
     14     0.48597489    -0.05805744 Kj`sq":Je0  
Change in Focus                :      -0.662040 *d/,Y-tl  
     15     0.21462327    -0.32940907 {I~[a#^  
Change in Focus                :       1.611296 J"W+9sI0  
     16     0.43378226    -0.11025008 q1O}dSPwX  
Change in Focus                :      -0.640081 GP._C=]?c  
     17     0.39321881    -0.15081353 Vo-]&u&cr  
Change in Focus                :       0.914906 *iW$>Yjb  
     18     0.20692530    -0.33710703 WKB@9Vfju  
Change in Focus                :       0.801607 Qx%]u8s  
     19     0.51374068    -0.03029165 r")zR,  
Change in Focus                :       0.947293 sxBRg=  
     20     0.38013374    -0.16389860 xgQ]#{tG  
Change in Focus                :       0.667010 sJ(q.FRM'  
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Number of traceable Monte Carlo files generated: 20 W2([vRT  
W=)wiRQm  
Nominal     0.54403234 Z<t(h=?  
Best        0.54384387    Trial     2 }bxx]rDl  
Worst       0.18154684    Trial     4 xFcRp2W9R  
Mean        0.35770970 -$J%.fdPs  
Std Dev     0.11156454 ;zl/  
`'^&* 7,  
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Compensator Statistics: 7L=V{,,v  
Change in back focus: .
Iret:  
Minimum            :        -1.354815 UIl^s8/  
Maximum            :         1.611296 8*V8B=q}K  
Mean               :         0.161872 >X(,(mKi  
Standard Deviation :         0.869664 At#'q>Dn  
LpJ_HU7@lk  
90% >       0.20977951               95G*i;E  
80% >       0.22748071               }M I9?\"q  
50% >       0.38667627               i%R2#F7I  
20% >       0.46553746               BkTGH.4G%  
10% >       0.50064115                bCmhlSNi  
D(]])4  
End of Run. g}hR q%  
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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 }Pj3O~z  

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 X[cSmkp7  
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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                 ]]s_ 8u3  
80% >       0.22748071                 yD`{9'L -  
50% >       0.38667627                 #N|)hBz9-  
20% >       0.46553746                 [UI4YZu}  
10% >       0.50064115 [)`9euR%  
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最后这个数值是MTF值呢，还是MTF的公差？ xa#:oKF3  
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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？？？   a$MMp=p  
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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  : 1y_{#,{>  
90% >       0.20977951                 ClVMZ  
80% >       0.22748071                 tq@<8?  
50% >       0.38667627                 $F G4wA  
20% >       0.46553746                 PpU : 4;en  
10% >       0.50064115 \s<iM2]Kl  
....... X/i8$yqv  

o|alL-  
":"M/v%F  
这些数值都是MTF值

Criterion           : Geometric MTF average S&T at 30.0000 cycles per mm   }(M<sEK~  
Mode                : Sensitivities  T X6Ydd  
Sampling            : 2 3O#7OL68v  
Nominal Criterion   : 0.54403234 2[M:WZ.1  
Test Wavelength     : 0.6328 Cn28&$:J  
L?9Vz&8]  
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？ _|tg#i|Om  
1Kc*MS  
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