[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 Oi l>bv8  
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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 Z(U&0GH`  
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图片:2.jpg

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然后运行分析的结果如下： !M3Iu
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Analysis of Tolerances hhYo9jTHW  
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File : E:\光学设计资料\zemax练习\f500.ZMX |Zkcs]8M!  
Title: h1)p{5}H  
Date : TUE JUN 21 2011 i.K}(bo;b  
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Units are Millimeters. YMqL,&Q{1  
All changes are computed using linear differences. azOp53zR  
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Paraxial Focus compensation only. 5zEl`h  
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WARNING: Solves should be removed prior to tolerancing. F!aYK2  
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Mnemonics: p'xj:bB  
TFRN: Tolerance on curvature in fringes. hkW"D<ii-  
TTHI: Tolerance on thickness. :4)mv4Q  
TSDX: Tolerance on surface decentering in x. TzX>d<x  
TSDY: Tolerance on surface decentering in y. 5'oWd e  
TSTX: Tolerance on surface tilt in x (degrees). G?jY>;P)  
TSTY: Tolerance on surface tilt in y (degrees). Z\dILt:#z  
TIRR: Tolerance on irregularity (fringes). NK"y@)%0  
TIND: Tolerance on Nd index of refraction. : PQA9U|  
TEDX: Tolerance on element decentering in x. 3OM\R%M  
TEDY: Tolerance on element decentering in y. i<%(Z[9Lk  
TETX: Tolerance on element tilt in x (degrees). /vU9eh"%  
TETY: Tolerance on element tilt in y (degrees). Do2y7,jv  
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WARNING: RAY AIMING IS OFF. Very loose tolerances may not be computed accurately. .l#Pmd!  
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WARNING: Boundary constraints on compensators will be ignored. mv30xcc  
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Criterion           : Geometric MTF average S&T at 30.0000 cycles per mm Zsf<)Vx  
Mode                : Sensitivities ugMJ}IGq  
Sampling            : 2 QW~o+N~~  
Nominal Criterion   : 0.54403234 +.>O%pNj  
Test Wavelength     : 0.6328 KZD&Ih(vC  
M5P63=1+  
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Fields: XY Symmetric Angle in degrees hi.{  
#      X-Field      Y-Field       Weight    VDX    VDY    VCX    VCY 3c-ve$8u~  
1   0.000E+000   0.000E+000   1.000E+000  0.000  0.000  0.000  0.000 xES+m/?KlZ  
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Sensitivity Analysis: hpAIIgn  
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                 |----------------- Minimum ----------------| |----------------- Maximum ----------------| fnB-?8K<  
Type                      Value      Criterion        Change          Value      Criterion        Change gb@!Co3  
Fringe tolerance on surface 1 )FU4iN)ei  
TFRN   1            -1.00000000     0.54257256    -0.00145977     1.00000000     0.54548607     0.00145374 S!.xmc\  
Change in Focus                :      -0.000000                            0.000000 &s] s]V)  
Fringe tolerance on surface 2 1f}S:Z  
TFRN   2            -1.00000000     0.54177471    -0.00225762     1.00000000     0.54627463     0.00224230 [a+?z6qI\}  
Change in Focus                :       0.000000                            0.000000 +S3'ms  
Fringe tolerance on surface 3 c~$ipX
  
TFRN   3            -1.00000000     0.54779866     0.00376632     1.00000000     0.54022572    -0.00380662 tgrQ$Yjk  
Change in Focus                :      -0.000000                            0.000000 -R&h?ec  
Thickness tolerance on surface 1 XWB>' UDQ#  
TTHI   1   3        -0.20000000     0.54321462    -0.00081772     0.20000000     0.54484759     0.00081525 YW/<. 0rI  
Change in Focus                :       0.000000                            0.000000 BE3~f6 `  
Thickness tolerance on surface 2 e3(0L I  
TTHI   2   3        -0.20000000     0.54478712     0.00075478     0.20000000     0.54327558    -0.00075675 L^ +0K}eD  
Change in Focus                :       0.000000                           -0.000000 *w@>zkB
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Decenter X tolerance on surfaces 1 through 3 Dvx"4EA{7{  
TEDX   1   3        -0.20000000     0.54401464   -1.7700E-005     0.20000000     0.54401464   -1.7700E-005 4J I;NN  
Change in Focus                :       0.000000                            0.000000 `w~ 9/sty  
Decenter Y tolerance on surfaces 1 through 3 0Fi
7|
  
TEDY   1   3        -0.20000000     0.54401464   -1.7700E-005     0.20000000     0.54401464   -1.7700E-005 ~t#'X8.)  
Change in Focus                :       0.000000                            0.000000 }8r+&e  
Tilt X tolerance on surfaces 1 through 3 (degrees) KTf!Pf?g  
TETX   1   3        -0.20000000     0.54897548     0.00494314     0.20000000     0.54897548     0.00494314 *[vf47)r!  
Change in Focus                :       0.000000                            0.000000 />f`X+d  
Tilt Y tolerance on surfaces 1 through 3 (degrees) kg !@i7  
TETY   1   3        -0.20000000     0.54897548     0.00494314     0.20000000     0.54897548     0.00494314 v`v+M4upC  
Change in Focus                :       0.000000                            0.000000 4|XE f,  
Decenter X tolerance on surface 1 | sQ5`lV?  
TSDX   1            -0.20000000     0.53999563    -0.00403671     0.20000000     0.53999563    -0.00403671  OSSMIPr  
Change in Focus                :       0.000000                            0.000000 5[Q44$a{  
Decenter Y tolerance on surface 1 8PQ$X2)  
TSDY   1            -0.20000000     0.53999563    -0.00403671     0.20000000     0.53999563    -0.00403671 ?G8 D6  
Change in Focus                :       0.000000                            0.000000 Sfvi|kZX  
Tilt X tolerance on surface (degrees) 1 IE,g  
TSTX   1            -0.20000000     0.42678383    -0.11724851     0.20000000     0.42678383    -0.11724851 1TbKnmTx  
Change in Focus                :       0.000000                            0.000000 jj.yB#T  
Tilt Y tolerance on surface (degrees) 1 aC%0jJ<eo  
TSTY   1            -0.20000000     0.42678383    -0.11724851     0.20000000     0.42678383    -0.11724851 />$)o7U`+  
Change in Focus                :       0.000000                            0.000000 :$94y{  
Decenter X tolerance on surface 2 H
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TSDX   2            -0.20000000     0.51705427    -0.02697807     0.20000000     0.51705427    -0.02697807 b
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Change in Focus                :       0.000000                            0.000000 G1P m!CM=  
Decenter Y tolerance on surface 2 moc_}(  
TSDY   2            -0.20000000     0.51705427    -0.02697807     0.20000000     0.51705427    -0.02697807 ?=PQQx2_*u  
Change in Focus                :       0.000000                            0.000000 MJ7!f+!5  
Tilt X tolerance on surface (degrees) 2 rc;| ,\  
TSTX   2            -0.20000000     0.35349910    -0.19053324     0.20000000     0.35349910    -0.19053324 $jw!DrE  
Change in Focus                :       0.000000                            0.000000 g8vN^nQf[  
Tilt Y tolerance on surface (degrees) 2 u' r;-|7  
TSTY   2            -0.20000000     0.35349910    -0.19053324     0.20000000     0.35349910    -0.19053324 DU[UGJg  
Change in Focus                :       0.000000                            0.000000 -6  
Decenter X tolerance on surface 3 6.By)L  
TSDX   3            -0.20000000     0.53419039    -0.00984195     0.20000000     0.53419039    -0.00984195 QY{f=  
Change in Focus                :       0.000000                            0.000000 ^Yn6kF  
Decenter Y tolerance on surface 3 2&=;$2?}  
TSDY   3            -0.20000000     0.53419039    -0.00984195     0.20000000     0.53419039    -0.00984195 "3\)@  
Change in Focus                :       0.000000                            0.000000 "@Te!.~A.  
Tilt X tolerance on surface (degrees) 3 b"f4}b  
TSTX   3            -0.20000000     0.42861670    -0.11541563     0.20000000     0.42861670    -0.11541563 b$B5sKQ  
Change in Focus                :       0.000000                            0.000000 9MGA#a  
Tilt Y tolerance on surface (degrees) 3 TuX#;!p6  
TSTY   3            -0.20000000     0.42861670    -0.11541563     0.20000000     0.42861670    -0.11541563 FoEZ1O<  
Change in Focus                :       0.000000                            0.000000 zlXkD~GV  
Irregularity of surface 1 in fringes "+)ey>_  
TIRR   1            -0.20000000     0.50973587    -0.03429647     0.20000000     0.57333868     0.02930634 s2d;601*b  
Change in Focus                :       0.000000                            0.000000 YjsaTdZ!&  
Irregularity of surface 2 in fringes 9|OQHy  
TIRR   2            -0.20000000     0.53400904    -0.01002330     0.20000000     0.55360281     0.00957047 q
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Change in Focus                :       0.000000                            0.000000 Tl25t^Y  
Irregularity of surface 3 in fringes ZegsV|  
TIRR   3            -0.20000000     0.58078982     0.03675748     0.20000000     0.49904394    -0.04498840 A70_hhP  
Change in Focus                :       0.000000                            0.000000 KK7Y"~ 9&-  
Index tolerance on surface 1 AWf zMJ;VS  
TIND   1            -0.00100000     0.52606778    -0.01796456     0.00100000     0.56121811     0.01718578 Z0-W%W  
Change in Focus                :       0.000000                            0.000000 a_pkUOu6  
Index tolerance on surface 2 [#)$BXG~y  
TIND   2            -0.00100000     0.55639086     0.01235852     0.00100000     0.53126361    -0.01276872 d/* [t!  
Change in Focus                :       0.000000                           -0.000000 Fl|u0SY  
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Worst offenders: HPU7 `b4  
Type                      Value      Criterion        Change H]}- U8}sp  
TSTY   2            -0.20000000     0.35349910    -0.19053324 R?I(f(ib   
TSTY   2             0.20000000     0.35349910    -0.19053324 0gt/JI($  
TSTX   2            -0.20000000     0.35349910    -0.19053324 5V%K'a(  
TSTX   2             0.20000000     0.35349910    -0.19053324 ^]Gt<_  
TSTY   1            -0.20000000     0.42678383    -0.11724851  snN1  
TSTY   1             0.20000000     0.42678383    -0.11724851 w0Us8JNGz  
TSTX   1            -0.20000000     0.42678383    -0.11724851 a+J :1'  
TSTX   1             0.20000000     0.42678383    -0.11724851 &<v#^2S3  
TSTY   3            -0.20000000     0.42861670    -0.11541563 (hmasy6hM  
TSTY   3             0.20000000     0.42861670    -0.11541563 Ar>Om!]=v  
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Estimated Performance Changes based upon Root-Sum-Square method: v 7Pv&|  
Nominal MTF                 :     0.54403234 <H#D/?n5  
Estimated change            :    -0.36299231 *h]qh20t  
Estimated MTF               :     0.18104003 9l(e:_`_  
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Compensator Statistics: Y`c\{&M6  
Change in back focus: %PyU3  
Minimum            :        -0.000000 C~6aX/:  
Maximum            :         0.000000 hbN*_[  
Mean               :        -0.000000 ~A"ODLgU9  
Standard Deviation :         0.000000 N*@bJ*0  
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Monte Carlo Analysis: a0AI
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Number of trials: 20 <Oy%  
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Initial Statistics: Normal Distribution i8A5m@,G  
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  Trial       Criterion        Change #%+IU  
      1     0.42804416    -0.11598818 I80.|KIv  
Change in Focus                :      -0.400171 qjTz]'^BpM  
      2     0.54384387    -0.00018847 ! 4i  
Change in Focus                :       1.018470 N}s[0s  
      3     0.44510003    -0.09893230 r:YAn^Lg  
Change in Focus                :      -0.601922 S0"OU0`N  
      4     0.18154684    -0.36248550 T@k&YJ  
Change in Focus                :       0.920681 ty/jTo}  
      5     0.28665820    -0.25737414 \`4}h[  
Change in Focus                :       1.253875 n>!E ]  
      6     0.21263372    -0.33139862 +IJpqFH  
Change in Focus                :      -0.903878 9}3W0F;  
      7     0.40051424    -0.14351809 zW+Y{^hf  
Change in Focus                :      -1.354815 MA"iM+Ar  
      8     0.48754161    -0.05649072 v "oO  
Change in Focus                :       0.215922 a}e7Q<cGj  
      9     0.40357468    -0.14045766 \'1%"JWK   
Change in Focus                :       0.281783 .R:eN&Y8y  
     10     0.26315315    -0.28087919 ,j2qY'wi  
Change in Focus                :      -1.048393 A6#ob
  
     11     0.26120585    -0.28282649 {feS-.Khv  
Change in Focus                :       1.017611 ,riwxl5*E/  
     12     0.24033815    -0.30369419 h2,AcM  
Change in Focus                :      -0.109292 I,?bZ&@8  
     13     0.37164046    -0.17239188 u}#rS%SF*  
Change in Focus                :      -0.692430 9lny[{9  
     14     0.48597489    -0.05805744 g]jtVQH']  
Change in Focus                :      -0.662040 cL=P((<K?  
     15     0.21462327    -0.32940907 0aGfz=V&  
Change in Focus                :       1.611296 >} aykz*g  
     16     0.43378226    -0.11025008 ]kKf4SJZFU  
Change in Focus                :      -0.640081 fpoH7Jd V  
     17     0.39321881    -0.15081353 t7-sCC0  
Change in Focus                :       0.914906 U7:~@eYy  
     18     0.20692530    -0.33710703 @W^g(I(w  
Change in Focus                :       0.801607
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     19     0.51374068    -0.03029165 FeCQGT  
Change in Focus                :       0.947293 3ON]c13  
     20     0.38013374    -0.16389860 $H5PB' b  
Change in Focus                :       0.667010 `cZG&R  
SxQ|1:i%  
Number of traceable Monte Carlo files generated: 20 : l]>nF4  
;z%& 3u/  
Nominal     0.54403234 o AQ92~b  
Best        0.54384387    Trial     2 %/'[GC'y!  
Worst       0.18154684    Trial     4 Ke,-8e#Q  
Mean        0.35770970 "~FXmKcX  
Std Dev     0.11156454 oWJ}]ip  
w7%N=hL1
 
~2"
|4  
Compensator Statistics: kZn!]TseN  
Change in back focus: MjG.Ili$m  
Minimum            :        -1.354815 ;1eu8N8  
Maximum            :         1.611296 H) (K  
Mean               :         0.161872 wmoOp;C  
Standard Deviation :         0.869664 sIELkF?.  
E}a3.6)p  
90% >       0.20977951               $_)f|\s  
80% >       0.22748071               A+[wH(  
50% >       0.38667627               I>P</TE7  
20% >       0.46553746               e3[Q
M  
10% >       0.50064115                g%\e80~1(  
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End of Run. j^64:3  
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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 h[B Ft{x  

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 s)To#  
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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                 Wh4lz~D\@  
80% >       0.22748071                 |L+GM"hg  
50% >       0.38667627                 pF8'S{y  
20% >       0.46553746                 $iF7hyZ  
10% >       0.50064115 1w5p*U0 ;  
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最后这个数值是MTF值呢，还是MTF的公差？ k}<mmKB  
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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？？？   C3memimN  
9PR&/Q F5  
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  : u4Xrvfb,  
90% >       0.20977951                 1f~DUku=  
80% >       0.22748071                 vu*08<M~i|  
50% >       0.38667627                 \C>I6{  
20% >       0.46553746                 t[DXG2&  
10% >       0.50064115 H-S28%.  
....... 9EH%[wfv  

.vb*|So  
3|~(9b{+  
这些数值都是MTF值

Criterion           : Geometric MTF average S&T at 30.0000 cycles per mm   uL1-@D,  
Mode                : Sensitivities @F=4B0=  
Sampling            : 2 `zTVup&  
Nominal Criterion   : 0.54403234 le1'r>E$  
Test Wavelength     : 0.6328 T}zOM%]]  
~Ipl'cE  
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？ z5Po,@W  
4s3n|6v  
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