[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 /fV;^=:8c  
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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 0>Z_*U~6  
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图片:2.jpg

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然后运行分析的结果如下： 8E]F$.6U  
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Analysis of Tolerances TBU&6M>{3  
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File : E:\光学设计资料\zemax练习\f500.ZMX K0Fh%Y4)QH  
Title: l0A&9g*l2  
Date : TUE JUN 21 2011 W-zP/]Dh  
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Units are Millimeters. %&t<K3&Yh  
All changes are computed using linear differences. ~Vjl7G\7i  
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Paraxial Focus compensation only. h2;F
 
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WARNING: Solves should be removed prior to tolerancing. WlBc.kFck  
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Mnemonics: ,]c 1A$Sr0  
TFRN: Tolerance on curvature in fringes. '}bgLv  
TTHI: Tolerance on thickness. "vE4E|  
TSDX: Tolerance on surface decentering in x. x39<6_?G  
TSDY: Tolerance on surface decentering in y. ZSd4z:/  
TSTX: Tolerance on surface tilt in x (degrees). 2WxQ(:d=  
TSTY: Tolerance on surface tilt in y (degrees). 9\JF`ff_  
TIRR: Tolerance on irregularity (fringes). JbQ) sp  
TIND: Tolerance on Nd index of refraction. #';:2Nyq  
TEDX: Tolerance on element decentering in x. +pn N!:q  
TEDY: Tolerance on element decentering in y. Whf.fK  
TETX: Tolerance on element tilt in x (degrees). hv_XP,1K  
TETY: Tolerance on element tilt in y (degrees). IG9VdDj  
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WARNING: RAY AIMING IS OFF. Very loose tolerances may not be computed accurately. zi*R`;_`,  
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WARNING: Boundary constraints on compensators will be ignored. LvUj9eVb/L  
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Criterion           : Geometric MTF average S&T at 30.0000 cycles per mm gn".u!9j  
Mode                : Sensitivities PGV/ h  
Sampling            : 2 Bad:no\W  
Nominal Criterion   : 0.54403234 2{G:=U  
Test Wavelength     : 0.6328 F,)%?<!I  
ZlzjVU/E  
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Fields: XY Symmetric Angle in degrees ;&-k#PE]/H  
#      X-Field      Y-Field       Weight    VDX    VDY    VCX    VCY \<TXS
)w]  
1   0.000E+000   0.000E+000   1.000E+000  0.000  0.000  0.000  0.000 !LN?PKJ  
h/hmlnOQl  
Sensitivity Analysis: t$#j
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                 |----------------- Minimum ----------------| |----------------- Maximum ----------------| p hzKm9  
Type                      Value      Criterion        Change          Value      Criterion        Change s 3f-7f<  
Fringe tolerance on surface 1 /?F/9hL  
TFRN   1            -1.00000000     0.54257256    -0.00145977     1.00000000     0.54548607     0.00145374 vbe
|hO""  
Change in Focus                :      -0.000000                            0.000000 3c6b6  
Fringe tolerance on surface 2 0eu$ W  
TFRN   2            -1.00000000     0.54177471    -0.00225762     1.00000000     0.54627463     0.00224230 !*bMa8]*  
Change in Focus                :       0.000000                            0.000000 .I0qGg  
Fringe tolerance on surface 3 0Bi.6r  
TFRN   3            -1.00000000     0.54779866     0.00376632     1.00000000     0.54022572    -0.00380662 @Y<bwv  
Change in Focus                :      -0.000000                            0.000000 v"XGCi91L  
Thickness tolerance on surface 1 @wo(tf=@P  
TTHI   1   3        -0.20000000     0.54321462    -0.00081772     0.20000000     0.54484759     0.00081525 WQL\y3f5  
Change in Focus                :       0.000000                            0.000000 iq( E'`d  
Thickness tolerance on surface 2 D}8[bWF  
TTHI   2   3        -0.20000000     0.54478712     0.00075478     0.20000000     0.54327558    -0.00075675 /Uy"M:|V1  
Change in Focus                :       0.000000                           -0.000000 QD*35Y!d  
Decenter X tolerance on surfaces 1 through 3 (~wqa 3  
TEDX   1   3        -0.20000000     0.54401464   -1.7700E-005     0.20000000     0.54401464   -1.7700E-005 bU:EqW\(^  
Change in Focus                :       0.000000                            0.000000 Jx7C'~,J  
Decenter Y tolerance on surfaces 1 through 3 64G[|" j D  
TEDY   1   3        -0.20000000     0.54401464   -1.7700E-005     0.20000000     0.54401464   -1.7700E-005 ={d>iByq  
Change in Focus                :       0.000000                            0.000000 (I{rLS!o,L  
Tilt X tolerance on surfaces 1 through 3 (degrees) 2:7zG"$  
TETX   1   3        -0.20000000     0.54897548     0.00494314     0.20000000     0.54897548     0.00494314 ,-d0b0  
Change in Focus                :       0.000000                            0.000000 PV\+P6aIb  
Tilt Y tolerance on surfaces 1 through 3 (degrees) MWpQ^dL_  
TETY   1   3        -0.20000000     0.54897548     0.00494314     0.20000000     0.54897548     0.00494314 6vNrBB  
Change in Focus                :       0.000000                            0.000000 p=GBUII #  
Decenter X tolerance on surface 1 6BbGA*%{  
TSDX   1            -0.20000000     0.53999563    -0.00403671     0.20000000     0.53999563    -0.00403671 +&( Mgbna  
Change in Focus                :       0.000000                            0.000000 yt=3sq  
Decenter Y tolerance on surface 1 p,>5\Zre
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TSDY   1            -0.20000000     0.53999563    -0.00403671     0.20000000     0.53999563    -0.00403671 >TnTnFWX  
Change in Focus                :       0.000000                            0.000000 i}mVQ\j5  
Tilt X tolerance on surface (degrees) 1 Zrk4*/ VY  
TSTX   1            -0.20000000     0.42678383    -0.11724851     0.20000000     0.42678383    -0.11724851 v|%Z+w  
Change in Focus                :       0.000000                            0.000000 T;y>>_,  
Tilt Y tolerance on surface (degrees) 1 -$jEfi4I  
TSTY   1            -0.20000000     0.42678383    -0.11724851     0.20000000     0.42678383    -0.11724851 dDGgvi|[Mz  
Change in Focus                :       0.000000                            0.000000 vAh6+K.e  
Decenter X tolerance on surface 2 p&bROuw<T  
TSDX   2            -0.20000000     0.51705427    -0.02697807     0.20000000     0.51705427    -0.02697807 9- YwkK#z  
Change in Focus                :       0.000000                            0.000000 'H&2HXw&2  
Decenter Y tolerance on surface 2 F{Jw^\  
TSDY   2            -0.20000000     0.51705427    -0.02697807     0.20000000     0.51705427    -0.02697807 +)<wDDC_  
Change in Focus                :       0.000000                            0.000000 7- ] as$  
Tilt X tolerance on surface (degrees) 2 f~y%%+{p  
TSTX   2            -0.20000000     0.35349910    -0.19053324     0.20000000     0.35349910    -0.19053324 w?wG(+X7  
Change in Focus                :       0.000000                            0.000000 y7 3VFb  
Tilt Y tolerance on surface (degrees) 2 ;q:zT\A  
TSTY   2            -0.20000000     0.35349910    -0.19053324     0.20000000     0.35349910    -0.19053324 `V]5sE]G
 
Change in Focus                :       0.000000                            0.000000 3
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Decenter X tolerance on surface 3 4c$ zKqz  
TSDX   3            -0.20000000     0.53419039    -0.00984195     0.20000000     0.53419039    -0.00984195 PQnF  
Change in Focus                :       0.000000                            0.000000 ,)Ju[
 
Decenter Y tolerance on surface 3 1#*a:F&re  
TSDY   3            -0.20000000     0.53419039    -0.00984195     0.20000000     0.53419039    -0.00984195 Ov4y%Pj  
Change in Focus                :       0.000000                            0.000000 O[s{ Gk'>  
Tilt X tolerance on surface (degrees) 3 7/ysVWt  
TSTX   3            -0.20000000     0.42861670    -0.11541563     0.20000000     0.42861670    -0.11541563 !QHFg-=7  
Change in Focus                :       0.000000                            0.000000 ?NR A:t(}  
Tilt Y tolerance on surface (degrees) 3 0Lc9M-Lg  
TSTY   3            -0.20000000     0.42861670    -0.11541563     0.20000000     0.42861670    -0.11541563 !?
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Change in Focus                :       0.000000                            0.000000 v'qG26
  
Irregularity of surface 1 in fringes i2YuOV!  
TIRR   1            -0.20000000     0.50973587    -0.03429647     0.20000000     0.57333868     0.02930634 'EF9Zt8  
Change in Focus                :       0.000000                            0.000000 ') gi%  
Irregularity of surface 2 in fringes d`nVc50  
TIRR   2            -0.20000000     0.53400904    -0.01002330     0.20000000     0.55360281     0.00957047 RwPN gRF  
Change in Focus                :       0.000000                            0.000000 P8>d6;o($  
Irregularity of surface 3 in fringes 9
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TIRR   3            -0.20000000     0.58078982     0.03675748     0.20000000     0.49904394    -0.04498840 e8]\U/
 
Change in Focus                :       0.000000                            0.000000 ng:9 l3x  
Index tolerance on surface 1 L%K\C  
TIND   1            -0.00100000     0.52606778    -0.01796456     0.00100000     0.56121811     0.01718578 S\5bmvqP"  
Change in Focus                :       0.000000                            0.000000 04'~ta(t  
Index tolerance on surface 2 H]p!\H  
TIND   2            -0.00100000     0.55639086     0.01235852     0.00100000     0.53126361    -0.01276872 WObvbaK  
Change in Focus                :       0.000000                           -0.000000 .0iQad&duh  
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Worst offenders: \"^w'ng  
Type                      Value      Criterion        Change ]Nl=wZ#`  
TSTY   2            -0.20000000     0.35349910    -0.19053324 !z<%GQ CT  
TSTY   2             0.20000000     0.35349910    -0.19053324 {Jx4xpvPo  
TSTX   2            -0.20000000     0.35349910    -0.19053324 U{z9>  
TSTX   2             0.20000000     0.35349910    -0.19053324 'u_t<F]b  
TSTY   1            -0.20000000     0.42678383    -0.11724851 I8/DR z$A  
TSTY   1             0.20000000     0.42678383    -0.11724851 ryCI>vJz  
TSTX   1            -0.20000000     0.42678383    -0.11724851 kRD%b[*d  
TSTX   1             0.20000000     0.42678383    -0.11724851 pN9A{v(  
TSTY   3            -0.20000000     0.42861670    -0.11541563 D <&X_  
TSTY   3             0.20000000     0.42861670    -0.11541563 {R61cD,n  
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Estimated Performance Changes based upon Root-Sum-Square method: *l;B\=KR  
Nominal MTF                 :     0.54403234 t{FlB!jv  
Estimated change            :    -0.36299231 x{,q]u /  
Estimated MTF               :     0.18104003 S_v'hlrrT  

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Compensator Statistics: vR=6pl$|~~  
Change in back focus: l)w Hl%p  
Minimum            :        -0.000000 2aB^WY'tC  
Maximum            :         0.000000 d/|D<Sb[s  
Mean               :        -0.000000 ;3@YZM'wt  
Standard Deviation :         0.000000 OhmQ,  
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Monte Carlo Analysis: f<*Js)k  
Number of trials: 20 P=+nB*hG  
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Initial Statistics: Normal Distribution b0A1hb[|  
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  Trial       Criterion        Change J}@z_^|"mJ  
      1     0.42804416    -0.11598818 ~$f;U  
Change in Focus                :      -0.400171 jfx8EbQ  
      2     0.54384387    -0.00018847 =w5O&(  
Change in Focus                :       1.018470 M$d%p6Cv  
      3     0.44510003    -0.09893230 NeBsv= [-  
Change in Focus                :      -0.601922 OXi@c;F  
      4     0.18154684    -0.36248550 "zY](P  
Change in Focus                :       0.920681 5"]~oPK  
      5     0.28665820    -0.25737414 U{$1[,f  
Change in Focus                :       1.253875 c.f"Gv  
      6     0.21263372    -0.33139862 Q
33"u/-v  
Change in Focus                :      -0.903878 RQB]/D\BO  
      7     0.40051424    -0.14351809 $DC*i-}qFg  
Change in Focus                :      -1.354815 7GSV  
      8     0.48754161    -0.05649072 X_G| hx  
Change in Focus                :       0.215922 |R@~-Ht  
      9     0.40357468    -0.14045766 *;U'[H3Q  
Change in Focus                :       0.281783 +"}=d3E6  
     10     0.26315315    -0.28087919 ?D)<,  
Change in Focus                :      -1.048393 ]cC[-F[  
     11     0.26120585    -0.28282649 Z,;cCxE  
Change in Focus                :       1.017611 Hiv!BV|  
     12     0.24033815    -0.30369419 5,;`$'?a%  
Change in Focus                :      -0.109292 ;.Ie#Vr1N  
     13     0.37164046    -0.17239188 N+)?$[  
Change in Focus                :      -0.692430 ,j ',x\  
     14     0.48597489    -0.05805744 <{:  
Change in Focus                :      -0.662040 <0.$'M~E  
     15     0.21462327    -0.32940907 bo=ZM9  
Change in Focus                :       1.611296 e{9jn>\,a  
     16     0.43378226    -0.11025008 J3b4cxm  
Change in Focus                :      -0.640081 1b>C
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     17     0.39321881    -0.15081353 o}'bv  
Change in Focus                :       0.914906 omf Rs  
     18     0.20692530    -0.33710703 H{
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Change in Focus                :       0.801607 )Vk6;__  
     19     0.51374068    -0.03029165 (9mMkU=  
Change in Focus                :       0.947293 F;!2(sPS  
     20     0.38013374    -0.16389860 DtWwGC  
Change in Focus                :       0.667010 ^t*x*m8  
25|8nfeC5  
Number of traceable Monte Carlo files generated: 20 m&oi8 P-6  
F'?I-jtI  
Nominal     0.54403234 @C-dG7U.P  
Best        0.54384387    Trial     2 nCvPB/-  
Worst       0.18154684    Trial     4 YEx)"t8E  
Mean        0.35770970 ;#)mLsl  
Std Dev     0.11156454 ^Ori| 4}'  
1fL<&G  
jSQ9.%4  
Compensator Statistics: -(JUd4#  
Change in back focus: zMK](o1Vj  
Minimum            :        -1.354815 W:VP1 :  
Maximum            :         1.611296 8g7,2f/ }  
Mean               :         0.161872 Zx?b<"k  
Standard Deviation :         0.869664 M}"r#Plq  
?68uS;  
90% >       0.20977951               `wTlyS3[  
80% >       0.22748071               tue/4Q#7  
50% >       0.38667627               W {.78Zi9K  
20% >       0.46553746               }98>5%Uv  
10% >       0.50064115                VnJMmMM  
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End of Run. l t]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 $ 'QdFkOr  

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 :Px\qh}K  
3|@t%K  
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                 qZG-Lh  
80% >       0.22748071                 U=o Z.\  
50% >       0.38667627                 x|apQ6  
20% >       0.46553746                 Z[,`"}}hv=  
10% >       0.50064115 +6%7CC6  
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最后这个数值是MTF值呢，还是MTF的公差？ /.Wc
_/  
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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？？？   |qL;Nu,d  
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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  : nR#a)et  
90% >       0.20977951                 A9.;>8!u  
80% >       0.22748071                 +"G(  
50% >       0.38667627                 kt5YgW  
20% >       0.46553746                 |<7i|J  
10% >       0.50064115 .k|-Ks|d|  
....... j?d!}v  

'NRN_c9  
0I649
9FQ  
这些数值都是MTF值

Criterion           : Geometric MTF average S&T at 30.0000 cycles per mm   4E,hcu  
Mode                : Sensitivities 939]8BERt  
Sampling            : 2 /6A:J]Q_  
Nominal Criterion   : 0.54403234 B1up^(?  
Test Wavelength     : 0.6328 'XG:1Bpm  
wZ}n3R,   
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？ pXGK:ceFu  
[]sB^UT  
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