[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 95DEuReKi  
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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 &W `xZyb3  
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图片:2.jpg

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然后运行分析的结果如下： lame/B&nc  
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Analysis of Tolerances ?KT{H(rU  
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File : E:\光学设计资料\zemax练习\f500.ZMX \P\Z<z7jy  
Title: qnm_#!&uHT  
Date : TUE JUN 21 2011 JAbUK[:K  
,d G.67  
Units are Millimeters. 1MelHW  
All changes are computed using linear differences. t=_^$M,yr  
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Paraxial Focus compensation only. ">A<%5F2  
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WARNING: Solves should be removed prior to tolerancing. &&ioGy}1  
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Mnemonics: n:j'0WW  
TFRN: Tolerance on curvature in fringes. _Hb;)9y  
TTHI: Tolerance on thickness. =TB_|`5;j  
TSDX: Tolerance on surface decentering in x. E-LkP;  
TSDY: Tolerance on surface decentering in y. !iXRt")  
TSTX: Tolerance on surface tilt in x (degrees). 3f;=#|l  
TSTY: Tolerance on surface tilt in y (degrees). 3;nOm =I  
TIRR: Tolerance on irregularity (fringes). -@TY8#O#-  
TIND: Tolerance on Nd index of refraction. jW/WG tz  
TEDX: Tolerance on element decentering in x. UK`A:N2[  
TEDY: Tolerance on element decentering in y. +`y(S}Z  
TETX: Tolerance on element tilt in x (degrees). 1/_g36\l$  
TETY: Tolerance on element tilt in y (degrees). z^Q'GBoBA  
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WARNING: RAY AIMING IS OFF. Very loose tolerances may not be computed accurately. m0HK1'  
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WARNING: Boundary constraints on compensators will be ignored. Dc9uq5l  
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Criterion           : Geometric MTF average S&T at 30.0000 cycles per mm tRjv-  
Mode                : Sensitivities Daf|.5>(@  
Sampling            : 2 UBvp32p  
Nominal Criterion   : 0.54403234 t;O)  
Test Wavelength     : 0.6328 K`*GZ+b|`  
"hkcN+=  
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Fields: XY Symmetric Angle in degrees %Ymi,o>  
#      X-Field      Y-Field       Weight    VDX    VDY    VCX    VCY ~o}:!y  
1   0.000E+000   0.000E+000   1.000E+000  0.000  0.000  0.000  0.000 )XI[hVUA  
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Sensitivity Analysis: vEv kC  
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                 |----------------- Minimum ----------------| |----------------- Maximum ----------------| gt kV=V  
Type                      Value      Criterion        Change          Value      Criterion        Change "~KDm(D  
Fringe tolerance on surface 1 XcR=4q|7  
TFRN   1            -1.00000000     0.54257256    -0.00145977     1.00000000     0.54548607     0.00145374 X+vKY  
Change in Focus                :      -0.000000                            0.000000 U?[ (  
Fringe tolerance on surface 2 W/'1ftn?D  
TFRN   2            -1.00000000     0.54177471    -0.00225762     1.00000000     0.54627463     0.00224230 *_V+K  
Change in Focus                :       0.000000                            0.000000 ]ua3I}_B6v  
Fringe tolerance on surface 3 ]HKt7 %,  
TFRN   3            -1.00000000     0.54779866     0.00376632     1.00000000     0.54022572    -0.00380662 ?d')#WnC  
Change in Focus                :      -0.000000                            0.000000 (qn=BPI  
Thickness tolerance on surface 1 o
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TTHI   1   3        -0.20000000     0.54321462    -0.00081772     0.20000000     0.54484759     0.00081525 d)%WaM%V  
Change in Focus                :       0.000000                            0.000000 +{UY9_~\3  
Thickness tolerance on surface 2 r"H::A  
TTHI   2   3        -0.20000000     0.54478712     0.00075478     0.20000000     0.54327558    -0.00075675 xd Z$|{,  
Change in Focus                :       0.000000                           -0.000000 /$^Tou/v  
Decenter X tolerance on surfaces 1 through 3 I{Du/"r#  
TEDX   1   3        -0.20000000     0.54401464   -1.7700E-005     0.20000000     0.54401464   -1.7700E-005
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Change in Focus                :       0.000000                            0.000000 '/Aq2  
Decenter Y tolerance on surfaces 1 through 3 An2>]\L  
TEDY   1   3        -0.20000000     0.54401464   -1.7700E-005     0.20000000     0.54401464   -1.7700E-005 {!,K[QwcI  
Change in Focus                :       0.000000                            0.000000 VKa+[  
Tilt X tolerance on surfaces 1 through 3 (degrees) x}G:n[B7_V  
TETX   1   3        -0.20000000     0.54897548     0.00494314     0.20000000     0.54897548     0.00494314 "t|)Kl  
Change in Focus                :       0.000000                            0.000000 >?g@Nt8  
Tilt Y tolerance on surfaces 1 through 3 (degrees) *ug~LK5Y.  
TETY   1   3        -0.20000000     0.54897548     0.00494314     0.20000000     0.54897548     0.00494314 O&!R7T  
Change in Focus                :       0.000000                            0.000000 CmEqo;Is  
Decenter X tolerance on surface 1 J[/WBVFDf  
TSDX   1            -0.20000000     0.53999563    -0.00403671     0.20000000     0.53999563    -0.00403671 xAmtm"  
Change in Focus                :       0.000000                            0.000000 8SRR)O[)}  
Decenter Y tolerance on surface 1 41 F;X{Br  
TSDY   1            -0.20000000     0.53999563    -0.00403671     0.20000000     0.53999563    -0.00403671 {C |R@S  
Change in Focus                :       0.000000                            0.000000 5xH=w:  
Tilt X tolerance on surface (degrees) 1 ~IhAO}1  
TSTX   1            -0.20000000     0.42678383    -0.11724851     0.20000000     0.42678383    -0.11724851 zs$r>rlO  
Change in Focus                :       0.000000                            0.000000 M7#!Y=  
Tilt Y tolerance on surface (degrees) 1 Vl.,e1)6  
TSTY   1            -0.20000000     0.42678383    -0.11724851     0.20000000     0.42678383    -0.11724851 C'R9Nn'  
Change in Focus                :       0.000000                            0.000000 jAJ='|[X\  
Decenter X tolerance on surface 2 I}f`iBG  
TSDX   2            -0.20000000     0.51705427    -0.02697807     0.20000000     0.51705427    -0.02697807 :{u`qi  
Change in Focus                :       0.000000                            0.000000 c~0kZA6  
Decenter Y tolerance on surface 2 xGs}hVlZiC  
TSDY   2            -0.20000000     0.51705427    -0.02697807     0.20000000     0.51705427    -0.02697807 &V4Zmn?UU  
Change in Focus                :       0.000000                            0.000000 ^*.[b  
Tilt X tolerance on surface (degrees) 2 A?R`~*Q5  
TSTX   2            -0.20000000     0.35349910    -0.19053324     0.20000000     0.35349910    -0.19053324 2 6#p,P  
Change in Focus                :       0.000000                            0.000000 Y ^^4n$  
Tilt Y tolerance on surface (degrees) 2 {FIzoR"  
TSTY   2            -0.20000000     0.35349910    -0.19053324     0.20000000     0.35349910    -0.19053324 P&`%VW3E  
Change in Focus                :       0.000000                            0.000000 i>
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Decenter X tolerance on surface 3 c5]Xqq,  
TSDX   3            -0.20000000     0.53419039    -0.00984195     0.20000000     0.53419039    -0.00984195 ?Y"%BS+pt  
Change in Focus                :       0.000000                            0.000000 0C4eer+D  
Decenter Y tolerance on surface 3 uq5?t  
TSDY   3            -0.20000000     0.53419039    -0.00984195     0.20000000     0.53419039    -0.00984195 XgxE M1(  
Change in Focus                :       0.000000                            0.000000 _CD~5EA:  
Tilt X tolerance on surface (degrees) 3 w8lrpbLh  
TSTX   3            -0.20000000     0.42861670    -0.11541563     0.20000000     0.42861670    -0.11541563 5 -i,Tx&:  
Change in Focus                :       0.000000                            0.000000 G ;j1zs  
Tilt Y tolerance on surface (degrees) 3 }M4d
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TSTY   3            -0.20000000     0.42861670    -0.11541563     0.20000000     0.42861670    -0.11541563 A6(Do]M  
Change in Focus                :       0.000000                            0.000000 @O"7@%nu  
Irregularity of surface 1 in fringes uFr12ZFgK  
TIRR   1            -0.20000000     0.50973587    -0.03429647     0.20000000     0.57333868     0.02930634 {-A|f  
Change in Focus                :       0.000000                            0.000000 vQrxx  
Irregularity of surface 2 in fringes
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TIRR   2            -0.20000000     0.53400904    -0.01002330     0.20000000     0.55360281     0.00957047 K0w}l" )A  
Change in Focus                :       0.000000                            0.000000 3.W[]zH/u  
Irregularity of surface 3 in fringes !}Xoqamm  
TIRR   3            -0.20000000     0.58078982     0.03675748     0.20000000     0.49904394    -0.04498840 u\LNJo| B  
Change in Focus                :       0.000000                            0.000000 PUQ",;&y1  
Index tolerance on surface 1 FjCGD4x1N  
TIND   1            -0.00100000     0.52606778    -0.01796456     0.00100000     0.56121811     0.01718578 .7Mf(1:  
Change in Focus                :       0.000000                            0.000000 )
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Index tolerance on surface 2 o z*;q]  
TIND   2            -0.00100000     0.55639086     0.01235852     0.00100000     0.53126361    -0.01276872 9NTNulD>P  
Change in Focus                :       0.000000                           -0.000000 ; Z:[LJd  
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Worst offenders: =l(euBb  
Type                      Value      Criterion        Change d(IJ-qJN  
TSTY   2            -0.20000000     0.35349910    -0.19053324 nJI2IPZ  
TSTY   2             0.20000000     0.35349910    -0.19053324 rrL.Y&DTK  
TSTX   2            -0.20000000     0.35349910    -0.19053324 _[rFnyC+0V  
TSTX   2             0.20000000     0.35349910    -0.19053324 ?]><#[?'L  
TSTY   1            -0.20000000     0.42678383    -0.11724851  IuY9Q8  
TSTY   1             0.20000000     0.42678383    -0.11724851 Nu7>G  
TSTX   1            -0.20000000     0.42678383    -0.11724851 OIKx:&uIk  
TSTX   1             0.20000000     0.42678383    -0.11724851 TcZ.5Oe6h#  
TSTY   3            -0.20000000     0.42861670    -0.11541563 XG|N$~N+2  
TSTY   3             0.20000000     0.42861670    -0.11541563 p]L]=-(qI  
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Estimated Performance Changes based upon Root-Sum-Square method: Y`~B> J  
Nominal MTF                 :     0.54403234 h,c*:  
Estimated change            :    -0.36299231 Kq[4I[+R  
Estimated MTF               :     0.18104003 "_/ih1z]
 
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Compensator Statistics: jG>W+lq  
Change in back focus: `W86]ut[  
Minimum            :        -0.000000 GDSV:]hL  
Maximum            :         0.000000 !hVbx#bXl  
Mean               :        -0.000000 Snk+Z
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Standard Deviation :         0.000000 $0$sM/%  
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Monte Carlo Analysis: ?^VPO%  
Number of trials: 20 6Vnq|;W3Zv  
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Initial Statistics: Normal Distribution 3sr_V~cZ9  
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  Trial       Criterion        Change qyM/p.mP  
      1     0.42804416    -0.11598818 6R45+<.  
Change in Focus                :      -0.400171 5x+]uABE  
      2     0.54384387    -0.00018847 h0<PQZJ  
Change in Focus                :       1.018470 i~h@}0WR"  
      3     0.44510003    -0.09893230 <Yki8  
Change in Focus                :      -0.601922 X['9;1Xr  
      4     0.18154684    -0.36248550 1AAyzAP9`  
Change in Focus                :       0.920681 ]5'$EAsuW  
      5     0.28665820    -0.25737414 ~N!HxQ  
Change in Focus                :       1.253875 Au,oX2$  
      6     0.21263372    -0.33139862 m*m),mZ"  
Change in Focus                :      -0.903878 '3S~QN  
      7     0.40051424    -0.14351809 ^fsMfB  
Change in Focus                :      -1.354815 d?7?tL2  
      8     0.48754161    -0.05649072 %:aXEjm@  
Change in Focus                :       0.215922 ^;EhKG  
      9     0.40357468    -0.14045766 { b$"SIg1E  
Change in Focus                :       0.281783 e|Ri  
     10     0.26315315    -0.28087919 T^ktfgXq  
Change in Focus                :      -1.048393 -;
9 }P  
     11     0.26120585    -0.28282649 b,Wm
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Change in Focus                :       1.017611 u%C oo  
     12     0.24033815    -0.30369419 ujV{AF`JfB  
Change in Focus                :      -0.109292 
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     13     0.37164046    -0.17239188 @jn&Wf?  
Change in Focus                :      -0.692430 LGt>=|=bj  
     14     0.48597489    -0.05805744 ~&RTLr#\*M  
Change in Focus                :      -0.662040 *I 1H  
     15     0.21462327    -0.32940907 _)45G"M  
Change in Focus                :       1.611296 sqKx?r72  
     16     0.43378226    -0.11025008 L('1NN2  
Change in Focus                :      -0.640081 DMUirA;  
     17     0.39321881    -0.15081353 [rx9gOOa&  
Change in Focus                :       0.914906 _V$'nz#>e  
     18     0.20692530    -0.33710703 7Bj,{9^aJ  
Change in Focus                :       0.801607 Z8E<^<|  
     19     0.51374068    -0.03029165 vK!`#W`X  
Change in Focus                :       0.947293 E !!,JnU  
     20     0.38013374    -0.16389860 x^K4&'</  
Change in Focus                :       0.667010 %}@iz(*}>  
8R*;8y_  
Number of traceable Monte Carlo files generated: 20 1gHe$dzXk  
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Nominal     0.54403234 R&|.Lvmc/  
Best        0.54384387    Trial     2 $!O@Z8B  
Worst       0.18154684    Trial     4 m]jA(  
Mean        0.35770970
>W>rhxU  
Std Dev     0.11156454 $0[T<]{/?  
DvH-M3  
"VZ1LVI  
Compensator Statistics: 5e7YM@ng  
Change in back focus: /V,xSK9.&  
Minimum            :        -1.354815 NQqw|3  
Maximum            :         1.611296 %"`p&aE:  
Mean               :         0.161872 8Qg{@#Wr  
Standard Deviation :         0.869664 ]r;rAOWVV  
B_d\eD  
90% >       0.20977951               =7V4{|ESfy  
80% >       0.22748071               TOHz3=  
50% >       0.38667627               J2qsZ  
20% >       0.46553746               ndD>Oc}"3  
10% >       0.50064115               
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End of Run. eu5te0{G  
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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 Gj?Zbl <  

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 ]+:yfDtZd  
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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                 4(\1z6?D  
80% >       0.22748071                 ^x&x|ckR!  
50% >       0.38667627                 "1s ]74  
20% >       0.46553746                 :kHk'.V1(  
10% >       0.50064115 St?mq
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最后这个数值是MTF值呢，还是MTF的公差？ 4>(K~v5;N  

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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？？？   k$v7@|Aw  
F,_cci`p  
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  : M-Nn \h$,  
90% >       0.20977951                 f].z.  
80% >       0.22748071                 =uwG.,lC  
50% >       0.38667627                 ^umHuAAE  
20% >       0.46553746                 Zo-Au  
10% >       0.50064115 \i~5H]?d  
....... *=z.H  *  

ziW[qH {  
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这些数值都是MTF值

Criterion           : Geometric MTF average S&T at 30.0000 cycles per mm   @7PE&3  
Mode                : Sensitivities ,/L_9wV-\  
Sampling            : 2 .>zkS*oX4z  
Nominal Criterion   : 0.54403234 b!37:V\#}  
Test Wavelength     : 0.6328 L3Q1az!Ct  
qj|B #dU  
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？ e;}5~dSi  
H"?-&>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