[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 Fw!wSzsk3  
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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 %4#,y(dO  
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图片:2.jpg

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然后运行分析的结果如下： OU;R;=/]  
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Analysis of Tolerances 1{N73]-M:  
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File : E:\光学设计资料\zemax练习\f500.ZMX Bw-<xwD  
Title: \F]X!#&+  
Date : TUE JUN 21 2011 pKDP1S#<  
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Units are Millimeters. '>[l1<d!G  
All changes are computed using linear differences. ( zQ)EHRD  
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Paraxial Focus compensation only. Le3H!9lbc  
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WARNING: Solves should be removed prior to tolerancing. 7Q,9j.  
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Mnemonics: hn9'M!*:O  
TFRN: Tolerance on curvature in fringes. ;AV[bjRE\  
TTHI: Tolerance on thickness. n>]`8+a~%X  
TSDX: Tolerance on surface decentering in x. } ).rD  
TSDY: Tolerance on surface decentering in y. )1Rn;(j9Re  
TSTX: Tolerance on surface tilt in x (degrees). oTOr,Mn0\6  
TSTY: Tolerance on surface tilt in y (degrees). 5wM*(H^c[  
TIRR: Tolerance on irregularity (fringes). x`8rR
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TIND: Tolerance on Nd index of refraction. rU?sUm,ch  
TEDX: Tolerance on element decentering in x. R?"sM<3`e  
TEDY: Tolerance on element decentering in y. "]M:+mH{]  
TETX: Tolerance on element tilt in x (degrees). l`9<mL  
TETY: Tolerance on element tilt in y (degrees). *,$cW,LN  
1iWo*+5  
WARNING: RAY AIMING IS OFF. Very loose tolerances may not be computed accurately. )N[9r{3  
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WARNING: Boundary constraints on compensators will be ignored. [{.e1s<EK  
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Criterion           : Geometric MTF average S&T at 30.0000 cycles per mm 61|uvTX  
Mode                : Sensitivities &u5OL?>  
Sampling            : 2 AR9D;YfR~  
Nominal Criterion   : 0.54403234 tfzIem  
Test Wavelength     : 0.6328 :^7P. lhK  
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a12Q/K  
Fields: XY Symmetric Angle in degrees H/8H`9S$  
#      X-Field      Y-Field       Weight    VDX    VDY    VCX    VCY :s8^nEK  
1   0.000E+000   0.000E+000   1.000E+000  0.000  0.000  0.000  0.000 ; MU8@?yN  
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Sensitivity Analysis: V1Yab#  
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                 |----------------- Minimum ----------------| |----------------- Maximum ----------------| ~WH4D+  
Type                      Value      Criterion        Change          Value      Criterion        Change oRl~x^[%[-  
Fringe tolerance on surface 1 t']d_Vcza  
TFRN   1            -1.00000000     0.54257256    -0.00145977     1.00000000     0.54548607     0.00145374 +<5q8{]Pk  
Change in Focus                :      -0.000000                            0.000000 yuyI)ebC  
Fringe tolerance on surface 2 @<]sW*s  
TFRN   2            -1.00000000     0.54177471    -0.00225762     1.00000000     0.54627463     0.00224230 D$C>ZF  
Change in Focus                :       0.000000                            0.000000 3vx5dUgl,  
Fringe tolerance on surface 3 \Eq,4-q  
TFRN   3            -1.00000000     0.54779866     0.00376632     1.00000000     0.54022572    -0.00380662 [ kI|Thx  
Change in Focus                :      -0.000000                            0.000000 f681i(q"  
Thickness tolerance on surface 1 &L3OP@;  
TTHI   1   3        -0.20000000     0.54321462    -0.00081772     0.20000000     0.54484759     0.00081525 4DhG
p  
Change in Focus                :       0.000000                            0.000000 E`#m0Q(8  
Thickness tolerance on surface 2 I'&#pOB  
TTHI   2   3        -0.20000000     0.54478712     0.00075478     0.20000000     0.54327558    -0.00075675 NfG<!  
Change in Focus                :       0.000000                           -0.000000 ?f@g1jJP  
Decenter X tolerance on surfaces 1 through 3 32yGIR
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TEDX   1   3        -0.20000000     0.54401464   -1.7700E-005     0.20000000     0.54401464   -1.7700E-005 ?y1
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Change in Focus                :       0.000000                            0.000000 p,_,o3@~  
Decenter Y tolerance on surfaces 1 through 3 0p6  
TEDY   1   3        -0.20000000     0.54401464   -1.7700E-005     0.20000000     0.54401464   -1.7700E-005 u6hDjN  
Change in Focus                :       0.000000                            0.000000 >*DR>U  
Tilt X tolerance on surfaces 1 through 3 (degrees) >uVo'S.  
TETX   1   3        -0.20000000     0.54897548     0.00494314     0.20000000     0.54897548     0.00494314 q18IqY*Lo  
Change in Focus                :       0.000000                            0.000000 0ws1S(pq  
Tilt Y tolerance on surfaces 1 through 3 (degrees) cd_\?7  
TETY   1   3        -0.20000000     0.54897548     0.00494314     0.20000000     0.54897548     0.00494314 YU=Q`y[k  
Change in Focus                :       0.000000                            0.000000 Ul"9zTH  
Decenter X tolerance on surface 1 MBy0Ky  
TSDX   1            -0.20000000     0.53999563    -0.00403671     0.20000000     0.53999563    -0.00403671 ze* =7  
Change in Focus                :       0.000000                            0.000000 0,1x- yD  
Decenter Y tolerance on surface 1 F@m]Imn5Dx  
TSDY   1            -0.20000000     0.53999563    -0.00403671     0.20000000     0.53999563    -0.00403671 :H9\nU1  
Change in Focus                :       0.000000                            0.000000 +ucj>g1(#  
Tilt X tolerance on surface (degrees) 1 pib i#  
TSTX   1            -0.20000000     0.42678383    -0.11724851     0.20000000     0.42678383    -0.11724851 ~Mk{
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Change in Focus                :       0.000000                            0.000000 _~q!
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Tilt Y tolerance on surface (degrees) 1 )OjTn"  
TSTY   1            -0.20000000     0.42678383    -0.11724851     0.20000000     0.42678383    -0.11724851 ?D 8<}~Do  
Change in Focus                :       0.000000                            0.000000 JmMB=} <  
Decenter X tolerance on surface 2 @9,=|kxK  
TSDX   2            -0.20000000     0.51705427    -0.02697807     0.20000000     0.51705427    -0.02697807 R/!lDv!  
Change in Focus                :       0.000000                            0.000000 T@K= *p  
Decenter Y tolerance on surface 2 \X3Q,\H @  
TSDY   2            -0.20000000     0.51705427    -0.02697807     0.20000000     0.51705427    -0.02697807 Uh6LU5  
Change in Focus                :       0.000000                            0.000000 Vq8G( <77  
Tilt X tolerance on surface (degrees) 2 }~W:3A{7;  
TSTX   2            -0.20000000     0.35349910    -0.19053324     0.20000000     0.35349910    -0.19053324 :/rl \woA>  
Change in Focus                :       0.000000                            0.000000 zN3[W`q+m  
Tilt Y tolerance on surface (degrees) 2 eBlWwUy*6f  
TSTY   2            -0.20000000     0.35349910    -0.19053324     0.20000000     0.35349910    -0.19053324 dO?zLc0f  
Change in Focus                :       0.000000                            0.000000 /l.:GH36f  
Decenter X tolerance on surface 3 '3%JhG)#  
TSDX   3            -0.20000000     0.53419039    -0.00984195     0.20000000     0.53419039    -0.00984195 ;_$Q~X  
Change in Focus                :       0.000000                            0.000000 5OHg%
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Decenter Y tolerance on surface 3 *}F>c3x]  
TSDY   3            -0.20000000     0.53419039    -0.00984195     0.20000000     0.53419039    -0.00984195 @`Fv}RY{  
Change in Focus                :       0.000000                            0.000000 b#uNdq3  
Tilt X tolerance on surface (degrees) 3 |}^me7C,[  
TSTX   3            -0.20000000     0.42861670    -0.11541563     0.20000000     0.42861670    -0.11541563 B#Q` !B4v  
Change in Focus                :       0.000000                            0.000000 fL xGaOT  
Tilt Y tolerance on surface (degrees) 3 Uu_g_b:z  
TSTY   3            -0.20000000     0.42861670    -0.11541563     0.20000000     0.42861670    -0.11541563 I |PEC-(  
Change in Focus                :       0.000000                            0.000000 ni2GZ<1j  
Irregularity of surface 1 in fringes Q!9
 
TIRR   1            -0.20000000     0.50973587    -0.03429647     0.20000000     0.57333868     0.02930634 GG0H3MSc  
Change in Focus                :       0.000000                            0.000000 bEQy5AX  
Irregularity of surface 2 in fringes <bSG|VqnH  
TIRR   2            -0.20000000     0.53400904    -0.01002330     0.20000000     0.55360281     0.00957047 jF$bCbAUce  
Change in Focus                :       0.000000                            0.000000
DB~3(r?K  
Irregularity of surface 3 in fringes ^"dVz.  
TIRR   3            -0.20000000     0.58078982     0.03675748     0.20000000     0.49904394    -0.04498840 lF*}l  
Change in Focus                :       0.000000                            0.000000 eeVDU$*e=  
Index tolerance on surface 1 pwF+ZNo  
TIND   1            -0.00100000     0.52606778    -0.01796456     0.00100000     0.56121811     0.01718578 uBp,_V?  
Change in Focus                :       0.000000                            0.000000 hD>]\u  
Index tolerance on surface 2 %IA1Y>`  
TIND   2            -0.00100000     0.55639086     0.01235852     0.00100000     0.53126361    -0.01276872 8=K%7:b  
Change in Focus                :       0.000000                           -0.000000 a/\SPXQ/9  
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Worst offenders: -R]Iu\  
Type                      Value      Criterion        Change V),wDyi  
TSTY   2            -0.20000000     0.35349910    -0.19053324 GyC/39<P  
TSTY   2             0.20000000     0.35349910    -0.19053324
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TSTX   2            -0.20000000     0.35349910    -0.19053324 '2S/FO
b  
TSTX   2             0.20000000     0.35349910    -0.19053324 =,BDd$e  
TSTY   1            -0.20000000     0.42678383    -0.11724851 ]KQv]'  
TSTY   1             0.20000000     0.42678383    -0.11724851 opXxtYC@  
TSTX   1            -0.20000000     0.42678383    -0.11724851 IdS=lN$  
TSTX   1             0.20000000     0.42678383    -0.11724851 k~0#Iy_{M  
TSTY   3            -0.20000000     0.42861670    -0.11541563 o5@d1A  
TSTY   3             0.20000000     0.42861670    -0.11541563 _ez*dE%  
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Estimated Performance Changes based upon Root-Sum-Square method: Ao )\/AR'  
Nominal MTF                 :     0.54403234 o&t*[#  
Estimated change            :    -0.36299231 &%UZ"CcA  
Estimated MTF               :     0.18104003 q"48U.}T  
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Compensator Statistics: |Q(3rcOrV"  
Change in back focus: 4-CGe  
Minimum            :        -0.000000 }>5R9  
Maximum            :         0.000000 bJ"}-s+Dx  
Mean               :        -0.000000 .9u0WP95  
Standard Deviation :         0.000000 9xN`  
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Monte Carlo Analysis: lt{Df~c  
Number of trials: 20 )krBjF.$  
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Initial Statistics: Normal Distribution 8I}
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  Trial       Criterion        Change {'-^CoR  
      1     0.42804416    -0.11598818 S`Xx('!/|  
Change in Focus                :      -0.400171 b$
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      2     0.54384387    -0.00018847 ^, &'  
Change in Focus                :       1.018470 Akdx1h,  
      3     0.44510003    -0.09893230 c(kYCVc   
Change in Focus                :      -0.601922 {/|tVc63  
      4     0.18154684    -0.36248550 OcE,E6LD  
Change in Focus                :       0.920681 wX4gy
r  
      5     0.28665820    -0.25737414 dHkI9;  
Change in Focus                :       1.253875 {.j030Q  
      6     0.21263372    -0.33139862 BMo2t'L  
Change in Focus                :      -0.903878 1)H;}%[  
      7     0.40051424    -0.14351809 .T1n"TfsGO  
Change in Focus                :      -1.354815 G@3Jw[t  
      8     0.48754161    -0.05649072 =E$B0^_2RC  
Change in Focus                :       0.215922 pkE4"M!3=  
      9     0.40357468    -0.14045766 P8X59^cJ  
Change in Focus                :       0.281783 @iU(4eX  
     10     0.26315315    -0.28087919 C"0vMUZ  
Change in Focus                :      -1.048393 RhWW61!"  
     11     0.26120585    -0.28282649 zEKVyZd*{  
Change in Focus                :       1.017611 U+Vb#U7;  
     12     0.24033815    -0.30369419 }0C v J4  
Change in Focus                :      -0.109292 #Y0ru9
  
     13     0.37164046    -0.17239188 Gn%"B6  
Change in Focus                :      -0.692430 ja4zLf(<  
     14     0.48597489    -0.05805744 >rYkVlv  
Change in Focus                :      -0.662040 ;LC?3.  
     15     0.21462327    -0.32940907 ]-sgzM]q  
Change in Focus                :       1.611296 :CsrcT=  
     16     0.43378226    -0.11025008 [;Jq=G8&t  
Change in Focus                :      -0.640081
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     17     0.39321881    -0.15081353 k#n%at.g  
Change in Focus                :       0.914906 oh7tE$"c  
     18     0.20692530    -0.33710703 eGLB,29g
 
Change in Focus                :       0.801607 Os/?iGlD*E  
     19     0.51374068    -0.03029165 0}"'A[xE  
Change in Focus                :       0.947293 :rU,7`sE/  
     20     0.38013374    -0.16389860 L%<DLe^P`l  
Change in Focus                :       0.667010 \b}%A&Ij  
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Number of traceable Monte Carlo files generated: 20 Ki>XLX,er=  
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Nominal     0.54403234 (
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Best        0.54384387    Trial     2 s~m]>^?8MR  
Worst       0.18154684    Trial     4 KJv[z  
Mean        0.35770970 y"|gC!V}  
Std Dev     0.11156454 %R<xe.X  
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`PT'Lakf;3  
Compensator Statistics: ; Kh!OBZFo  
Change in back focus: WFTwFm6  
Minimum            :        -1.354815 8 q>  
Maximum            :         1.611296  L
+CPT  
Mean               :         0.161872 9w6 uoM  
Standard Deviation :         0.869664 Wjli(sT#-  
VV/aec8  
90% >       0.20977951               '?
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80% >       0.22748071               )|GYxG;8C  
50% >       0.38667627               rYM@e  
20% >       0.46553746               ~ \b~
 
10% >       0.50064115                7#7AK}  
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End of Run. %Iiu#- 'B  
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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 }/4),W@<  

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 BZ(DP_}&D  
4Ik'beZqK  
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                 Xpt9$=d  
80% >       0.22748071                 7* [  
50% >       0.38667627                 0\,!  
20% >       0.46553746                 -!V{wD3,B  
10% >       0.50064115 yMC6 Gvp  
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最后这个数值是MTF值呢，还是MTF的公差？ 5hh6;)  
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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？？？   C{+JrHV%h  
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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  : a5/Dz&>j6
 
90% >       0.20977951                 >>"@0tO  
80% >       0.22748071                 3g5r}Ug  
50% >       0.38667627                 ruyQ}b:zS  
20% >       0.46553746                 bUds E1f  
10% >       0.50064115 ,el[A`b  
....... xE$lx:C"FU  

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u^#e7u  
这些数值都是MTF值

Criterion           : Geometric MTF average S&T at 30.0000 cycles per mm   M4CC&?6\  
Mode                : Sensitivities SU6Aq?`@  
Sampling            : 2 1L!jI2~x}  
Nominal Criterion   : 0.54403234 +_u~Np  
Test Wavelength     : 0.6328 }qWB=,8HQ  
pU[yr'D.r  
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？ 8V9OMOt!  
yy&L&v'  
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