[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 m&(%&}g  
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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#=#aKW.  
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图片:2.jpg

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然后运行分析的结果如下： ;HD 4~3  

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Analysis of Tolerances ir( -$*J  
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File : E:\光学设计资料\zemax练习\f500.ZMX $cp16  
Title: .x\/XlM  
Date : TUE JUN 21 2011 %Q>~7P  
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Units are Millimeters. {7j6$.7J$&  
All changes are computed using linear differences. Q 37V!  
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Paraxial Focus compensation only. \Nh^Ig
 
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WARNING: Solves should be removed prior to tolerancing. fwar8 i1  
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Mnemonics: |e.3FjTH  
TFRN: Tolerance on curvature in fringes. '? !7 Be  
TTHI: Tolerance on thickness. w
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TSDX: Tolerance on surface decentering in x. P|!/mu]  
TSDY: Tolerance on surface decentering in y. Q8M:7#ySji  
TSTX: Tolerance on surface tilt in x (degrees). Ah8^^h|TPJ  
TSTY: Tolerance on surface tilt in y (degrees). r P<d[u  
TIRR: Tolerance on irregularity (fringes). `CTkx?e[  
TIND: Tolerance on Nd index of refraction. Y3sNr)qss  
TEDX: Tolerance on element decentering in x. 6@,'m  
TEDY: Tolerance on element decentering in y. TV[6+i*#  
TETX: Tolerance on element tilt in x (degrees). zO7lsx2=  
TETY: Tolerance on element tilt in y (degrees). 2s]]!{Z#  
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WARNING: RAY AIMING IS OFF. Very loose tolerances may not be computed accurately. !`d832  
inq4CGY  
WARNING: Boundary constraints on compensators will be ignored. nEZ-h7lzl(  
/o}0oo5B  
Criterion           : Geometric MTF average S&T at 30.0000 cycles per mm A{u\8-u  
Mode                : Sensitivities m`1
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Sampling            : 2 nJM9c[Ou^H  
Nominal Criterion   : 0.54403234 *BP\6"X  
Test Wavelength     : 0.6328 -h^} jP8  
E-7a`S  
jmZ|b6  
Fields: XY Symmetric Angle in degrees #4|i@0n}D  
#      X-Field      Y-Field       Weight    VDX    VDY    VCX    VCY >8Yrmq  
1   0.000E+000   0.000E+000   1.000E+000  0.000  0.000  0.000  0.000 D^T7pO  
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Sensitivity Analysis: eA~_)-Z-  
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                 |----------------- Minimum ----------------| |----------------- Maximum ----------------| :n%sU*'T  
Type                      Value      Criterion        Change          Value      Criterion        Change (VF4FC  
Fringe tolerance on surface 1 y1jGf83  
TFRN   1            -1.00000000     0.54257256    -0.00145977     1.00000000     0.54548607     0.00145374 9DP75 ti  
Change in Focus                :      -0.000000                            0.000000 Pc\4QvQ8  
Fringe tolerance on surface 2 b`={s  
TFRN   2            -1.00000000     0.54177471    -0.00225762     1.00000000     0.54627463     0.00224230 dBD4ogo1  
Change in Focus                :       0.000000                            0.000000 v#YS`];B  
Fringe tolerance on surface 3 ovBd%wJ 0  
TFRN   3            -1.00000000     0.54779866     0.00376632     1.00000000     0.54022572    -0.00380662 f>, Qhl  
Change in Focus                :      -0.000000                            0.000000 0o^#Fmuz  
Thickness tolerance on surface 1 Al-%j- j@-  
TTHI   1   3        -0.20000000     0.54321462    -0.00081772     0.20000000     0.54484759     0.00081525 -T>wi J  
Change in Focus                :       0.000000                            0.000000 xZ{|D  
Thickness tolerance on surface 2 .of:#~  
TTHI   2   3        -0.20000000     0.54478712     0.00075478     0.20000000     0.54327558    -0.00075675 \`iW__  
Change in Focus                :       0.000000                           -0.000000 I!i#=  
Decenter X tolerance on surfaces 1 through 3 JEkIbf?=r  
TEDX   1   3        -0.20000000     0.54401464   -1.7700E-005     0.20000000     0.54401464   -1.7700E-005 J9KLO=  
Change in Focus                :       0.000000                            0.000000 l4BO@  
Decenter Y tolerance on surfaces 1 through 3 Hh'14n&W  
TEDY   1   3        -0.20000000     0.54401464   -1.7700E-005     0.20000000     0.54401464   -1.7700E-005 =~2 Uv>YG  
Change in Focus                :       0.000000                            0.000000 \]e w@C  
Tilt X tolerance on surfaces 1 through 3 (degrees) kl{OO%jZ  
TETX   1   3        -0.20000000     0.54897548     0.00494314     0.20000000     0.54897548     0.00494314 `b'|FKc]  
Change in Focus                :       0.000000                            0.000000 C,e$g
 
Tilt Y tolerance on surfaces 1 through 3 (degrees) fKK-c9F  
TETY   1   3        -0.20000000     0.54897548     0.00494314     0.20000000     0.54897548     0.00494314 tEs[zo+DR-  
Change in Focus                :       0.000000                            0.000000 (A<sFw?  
Decenter X tolerance on surface 1 L|xen*O  
TSDX   1            -0.20000000     0.53999563    -0.00403671     0.20000000     0.53999563    -0.00403671 3x;y}:wQa  
Change in Focus                :       0.000000                            0.000000 @ 6VH%  
Decenter Y tolerance on surface 1 PAWr1]DI  
TSDY   1            -0.20000000     0.53999563    -0.00403671     0.20000000     0.53999563    -0.00403671 #o |&MV_j  
Change in Focus                :       0.000000                            0.000000 QIz N
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Tilt X tolerance on surface (degrees) 1 hZ/  
TSTX   1            -0.20000000     0.42678383    -0.11724851     0.20000000     0.42678383    -0.11724851 )k%drdY{J'  
Change in Focus                :       0.000000                            0.000000 .)pRB7O3  
Tilt Y tolerance on surface (degrees) 1 Hn]n]wsLy  
TSTY   1            -0.20000000     0.42678383    -0.11724851     0.20000000     0.42678383    -0.11724851 kG7,1teMk  
Change in Focus                :       0.000000                            0.000000 Y`_X@Q  
Decenter X tolerance on surface 2 :8!3*C-=  
TSDX   2            -0.20000000     0.51705427    -0.02697807     0.20000000     0.51705427    -0.02697807 GbrPtu2{@V  
Change in Focus                :       0.000000                            0.000000 zxmI/]3+/  
Decenter Y tolerance on surface 2 PC(iqL8r  
TSDY   2            -0.20000000     0.51705427    -0.02697807     0.20000000     0.51705427    -0.02697807 87E3p
e  
Change in Focus                :       0.000000                            0.000000 `h{mj|~  
Tilt X tolerance on surface (degrees) 2 $Aoqtz d\  
TSTX   2            -0.20000000     0.35349910    -0.19053324     0.20000000     0.35349910    -0.19053324 1
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Change in Focus                :       0.000000                            0.000000 ydFhw}1>  
Tilt Y tolerance on surface (degrees) 2 Y>!W&Gtu  
TSTY   2            -0.20000000     0.35349910    -0.19053324     0.20000000     0.35349910    -0.19053324 e8uIh[+ 0  
Change in Focus                :       0.000000                            0.000000 GBOmVQ $Hb  
Decenter X tolerance on surface 3 .p*D[o2 9  
TSDX   3            -0.20000000     0.53419039    -0.00984195     0.20000000     0.53419039    -0.00984195 $=QO_t)?  
Change in Focus                :       0.000000                            0.000000 &Or=_5Y`  
Decenter Y tolerance on surface 3 *SG2k .$  
TSDY   3            -0.20000000     0.53419039    -0.00984195     0.20000000     0.53419039    -0.00984195 !U~#H_  
Change in Focus                :       0.000000                            0.000000 L<>NL$CrN  
Tilt X tolerance on surface (degrees) 3 Gy7x?  
TSTX   3            -0.20000000     0.42861670    -0.11541563     0.20000000     0.42861670    -0.11541563 t }C ^E  
Change in Focus                :       0.000000                            0.000000 yNf=Kl  
Tilt Y tolerance on surface (degrees) 3 teNQUIe-  
TSTY   3            -0.20000000     0.42861670    -0.11541563     0.20000000     0.42861670    -0.11541563 \kGtYkctZ  
Change in Focus                :       0.000000                            0.000000 Hh=::Bi  
Irregularity of surface 1 in fringes EKJ4_kkjM  
TIRR   1            -0.20000000     0.50973587    -0.03429647     0.20000000     0.57333868     0.02930634 yzzre>F  
Change in Focus                :       0.000000                            0.000000 8GRrf2  
Irregularity of surface 2 in fringes W]MJ!4  
TIRR   2            -0.20000000     0.53400904    -0.01002330     0.20000000     0.55360281     0.00957047 '# 2J?f'  
Change in Focus                :       0.000000                            0.000000 v5ddb)  
Irregularity of surface 3 in fringes gbv[*R{<%  
TIRR   3            -0.20000000     0.58078982     0.03675748     0.20000000     0.49904394    -0.04498840 naCI55Wx  
Change in Focus                :       0.000000                            0.000000 {%~Ec4r  
Index tolerance on surface 1 ;mKU>F<V  
TIND   1            -0.00100000     0.52606778    -0.01796456     0.00100000     0.56121811     0.01718578 x
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Change in Focus                :       0.000000                            0.000000 ?(UXK hs  
Index tolerance on surface 2 T eTOj|  
TIND   2            -0.00100000     0.55639086     0.01235852     0.00100000     0.53126361    -0.01276872 _q}%!#4  
Change in Focus                :       0.000000                           -0.000000 $ttr_4=  
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Worst offenders: eZkz 1j~  
Type                      Value      Criterion        Change -2Cf)>`v  
TSTY   2            -0.20000000     0.35349910    -0.19053324 o5@P>\u>  
TSTY   2             0.20000000     0.35349910    -0.19053324 \I{A33i2w  
TSTX   2            -0.20000000     0.35349910    -0.19053324 6Tmb@<I_  
TSTX   2             0.20000000     0.35349910    -0.19053324 6]49kHgMhe  
TSTY   1            -0.20000000     0.42678383    -0.11724851 RWcQT`  
TSTY   1             0.20000000     0.42678383    -0.11724851 ,/U9v~  
TSTX   1            -0.20000000     0.42678383    -0.11724851 8=AKOOU7>  
TSTX   1             0.20000000     0.42678383    -0.11724851 u)]sJ1p  
TSTY   3            -0.20000000     0.42861670    -0.11541563 [zd-=.:+M[  
TSTY   3             0.20000000     0.42861670    -0.11541563 3YF]o9  
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Estimated Performance Changes based upon Root-Sum-Square method: IoX9yGq  
Nominal MTF                 :     0.54403234 \uIC<#o"N  
Estimated change            :    -0.36299231 y9 '3vZ  
Estimated MTF               :     0.18104003 ADUI@#vk  
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Compensator Statistics: p{PYUW"?^  
Change in back focus: 3!UP>,!  
Minimum            :        -0.000000 -^"?a]B  
Maximum            :         0.000000 :m)?+  
Mean               :        -0.000000 ]}c=U@D,9  
Standard Deviation :         0.000000 
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Monte Carlo Analysis: 9}_f\Bs  
Number of trials: 20 )fr\V."  
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Initial Statistics: Normal Distribution bv];Gk*Z-  
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  Trial       Criterion        Change 2p[3Ap  
      1     0.42804416    -0.11598818 |mA*[?ye@  
Change in Focus                :      -0.400171 yln.E vJjD  
      2     0.54384387    -0.00018847 l0_O<  
Change in Focus                :       1.018470 WR1,J0UU6  
      3     0.44510003    -0.09893230 Lj,%pzJ  
Change in Focus                :      -0.601922 T ua @w+  
      4     0.18154684    -0.36248550 l!'iLq"K(  
Change in Focus                :       0.920681 ~'mhC46d  
      5     0.28665820    -0.25737414 y~ LVK8  
Change in Focus                :       1.253875 ,FO|'l  
      6     0.21263372    -0.33139862 bm?TMhC  
Change in Focus                :      -0.903878 AV! cCQ  
      7     0.40051424    -0.14351809 gC 4#!P  
Change in Focus                :      -1.354815 x{5*%}lX8  
      8     0.48754161    -0.05649072 .[A
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Change in Focus                :       0.215922 Ey%NqOs0#  
      9     0.40357468    -0.14045766 ?K#$81;[  
Change in Focus                :       0.281783 [%Xfl7;Wh  
     10     0.26315315    -0.28087919 rJwJ5U  
Change in Focus                :      -1.048393 {}e IpK,+  
     11     0.26120585    -0.28282649 v$Z1
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Change in Focus                :       1.017611 h^,a 1'  
     12     0.24033815    -0.30369419 #YdU,y=B  
Change in Focus                :      -0.109292 | w -W=v  
     13     0.37164046    -0.17239188 MG>;|*$%  
Change in Focus                :      -0.692430 (%, '  
     14     0.48597489    -0.05805744 Yd'ke,Je  
Change in Focus                :      -0.662040 "Xc=<r
X  
     15     0.21462327    -0.32940907 rK
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Change in Focus                :       1.611296 IuD<lMeJJ  
     16     0.43378226    -0.11025008 2T5ZbXc+x  
Change in Focus                :      -0.640081 9m4|1)  
     17     0.39321881    -0.15081353 /.bwwj_;  
Change in Focus                :       0.914906 L4%LE/t|e  
     18     0.20692530    -0.33710703 ^lj>v}4fkW  
Change in Focus                :       0.801607 i9tM]/SP  
     19     0.51374068    -0.03029165 {wySH[V  
Change in Focus                :       0.947293 uyIA]OtyN  
     20     0.38013374    -0.16389860 jT',+  
Change in Focus                :       0.667010 va<pHSX&I@  
db|$7]!w  
Number of traceable Monte Carlo files generated: 20 Ns(F%zkm  
8pk">"#s  
Nominal     0.54403234 /FY_LM  
Best        0.54384387    Trial     2 8wOPpdc
 
Worst       0.18154684    Trial     4 >E3OYa?G  
Mean        0.35770970 we3t,?`rk7  
Std Dev     0.11156454 v3Kqs:"\  
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{;r5]wimb  
Compensator Statistics: F
44")fY  
Change in back focus: !v=ha%w{  
Minimum            :        -1.354815 aoN[mV'  
Maximum            :         1.611296 }J1#UH_E  
Mean               :         0.161872 t)h3GM  
Standard Deviation :         0.869664 qI9 BAs1~}  
:O2N'vl47A  
90% >       0.20977951               KMa?2cJH#  
80% >       0.22748071               3;AAC (X  
50% >       0.38667627               ?FyA2q!  
20% >       0.46553746               `fXcW)  
10% >       0.50064115                #"l=Lv  
L`6`NYR  
End of Run. Wp $\>  
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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 eo!{rs@f  

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 G6FknYj  
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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                 {=TD^>?  
80% >       0.22748071                 %%*t{0!H+  
50% >       0.38667627                 h<[o;E  
20% >       0.46553746                 Xcb\N  
10% >       0.50064115 ,{$:Q}`  
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最后这个数值是MTF值呢，还是MTF的公差？ "[76>\'H  
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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？？？   mhL,:UE  
6:Ra3!V"v  
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  : 8wMu^3r  
90% >       0.20977951                 u6j\@U6I  
80% >       0.22748071                 8K=sx@l  
50% >       0.38667627                 '#L.w6<B  
20% >       0.46553746                 -AWL :<  
10% >       0.50064115 LR|LP)I  
....... bVaydJ*  

;rC)*=4#  
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这些数值都是MTF值

Criterion           : Geometric MTF average S&T at 30.0000 cycles per mm   &]~Vft l  
Mode                : Sensitivities qRC-+k:  
Sampling            : 2 +X#JCLD  
Nominal Criterion   : 0.54403234 tj7{[3~-[  
Test Wavelength     : 0.6328 0Rgo#`7l  
WCJ$S\#  
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？ l.gt+
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Bg3`w__l;  
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