[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 2P9gS[Ub  
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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 0PIiG-o9  
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图片:2.jpg

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然后运行分析的结果如下： rYUhGm
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Analysis of Tolerances 9U1cH qV  
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File : E:\光学设计资料\zemax练习\f500.ZMX ]m}<0-0  
Title: C2RR(n=N^  
Date : TUE JUN 21 2011 2_@vSwC  
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Units are Millimeters. ~e,k71  
All changes are computed using linear differences. Qhlgu
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Paraxial Focus compensation only. .]+Z<5Fo  
:A%|'HxH3  
WARNING: Solves should be removed prior to tolerancing. Vy-N3L  
/Po't(-x  
Mnemonics: rblEyCR  
TFRN: Tolerance on curvature in fringes. A<ca9g3  
TTHI: Tolerance on thickness. f,GF3vu"  
TSDX: Tolerance on surface decentering in x. _^cDB1I?  
TSDY: Tolerance on surface decentering in y. 8z&7wO  
TSTX: Tolerance on surface tilt in x (degrees). rZ<n0w  
TSTY: Tolerance on surface tilt in y (degrees). .kWMr^ g  
TIRR: Tolerance on irregularity (fringes). $]:ycn9l  
TIND: Tolerance on Nd index of refraction. [4uTp[U!r  
TEDX: Tolerance on element decentering in x. ]jNv}{  
TEDY: Tolerance on element decentering in y. l \~w(8g<A  
TETX: Tolerance on element tilt in x (degrees). mY9^W2:  
TETY: Tolerance on element tilt in y (degrees). ()1\b  
#$p&J1   
WARNING: RAY AIMING IS OFF. Very loose tolerances may not be computed accurately. d~f_wN&r  
(S/f!Dk&3  
WARNING: Boundary constraints on compensators will be ignored. vto^[a6?  
UJ-IK|P.#  
Criterion           : Geometric MTF average S&T at 30.0000 cycles per mm BS<5b*wG  
Mode                : Sensitivities J#DYZ>}Y  
Sampling            : 2 Oga/  
Nominal Criterion   : 0.54403234 aw9/bp*N  
Test Wavelength     : 0.6328 l}-JtZ?[?  
Vae}:8'}  
8[  
Fields: XY Symmetric Angle in degrees n}?XFx!%  
#      X-Field      Y-Field       Weight    VDX    VDY    VCX    VCY  QDCu  
1   0.000E+000   0.000E+000   1.000E+000  0.000  0.000  0.000  0.000 XOsPKq  
5Ug.J{d  
Sensitivity Analysis: {+~}iF<%  
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                 |----------------- Minimum ----------------| |----------------- Maximum ----------------| g?,\bmHE  
Type                      Value      Criterion        Change          Value      Criterion        Change po@=$HK  
Fringe tolerance on surface 1 N"d M+  
TFRN   1            -1.00000000     0.54257256    -0.00145977     1.00000000     0.54548607     0.00145374 QkbXm[K.Z  
Change in Focus                :      -0.000000                            0.000000 xa+=9=<AQ  
Fringe tolerance on surface 2 1}1.5[4d  
TFRN   2            -1.00000000     0.54177471    -0.00225762     1.00000000     0.54627463     0.00224230 ?@"F\Bv<h  
Change in Focus                :       0.000000                            0.000000 P]]re,&R  
Fringe tolerance on surface 3 !d Ns3d  
TFRN   3            -1.00000000     0.54779866     0.00376632     1.00000000     0.54022572    -0.00380662  ismx evD  
Change in Focus                :      -0.000000                            0.000000 K|Sh  
Thickness tolerance on surface 1 O iRhp(  
TTHI   1   3        -0.20000000     0.54321462    -0.00081772     0.20000000     0.54484759     0.00081525 r;}%} /IX  
Change in Focus                :       0.000000                            0.000000 @=CN#D12  
Thickness tolerance on surface 2 +&?#Gdb  
TTHI   2   3        -0.20000000     0.54478712     0.00075478     0.20000000     0.54327558    -0.00075675
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Change in Focus                :       0.000000                           -0.000000
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Decenter X tolerance on surfaces 1 through 3 b1An2e[  
TEDX   1   3        -0.20000000     0.54401464   -1.7700E-005     0.20000000     0.54401464   -1.7700E-005 \;&WF1d`ac  
Change in Focus                :       0.000000                            0.000000 lYz{#UX}  
Decenter Y tolerance on surfaces 1 through 3 om6'%nXhn  
TEDY   1   3        -0.20000000     0.54401464   -1.7700E-005     0.20000000     0.54401464   -1.7700E-005 )+;Xfftz  
Change in Focus                :       0.000000                            0.000000 %JUD54bBt  
Tilt X tolerance on surfaces 1 through 3 (degrees) Z$qLY<aV  
TETX   1   3        -0.20000000     0.54897548     0.00494314     0.20000000     0.54897548     0.00494314 :x"Q[079  
Change in Focus                :       0.000000                            0.000000 E= 3Ui  
Tilt Y tolerance on surfaces 1 through 3 (degrees) 8T
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TETY   1   3        -0.20000000     0.54897548     0.00494314     0.20000000     0.54897548     0.00494314 HRX}r$  
Change in Focus                :       0.000000                            0.000000 fmqHWu*wG  
Decenter X tolerance on surface 1 ZDHm@,d  
TSDX   1            -0.20000000     0.53999563    -0.00403671     0.20000000     0.53999563    -0.00403671 $tKz|H)  
Change in Focus                :       0.000000                            0.000000 (jj=CLe  
Decenter Y tolerance on surface 1 ~z;G$jd  
TSDY   1            -0.20000000     0.53999563    -0.00403671     0.20000000     0.53999563    -0.00403671 WdQR^'b$  
Change in Focus                :       0.000000                            0.000000 n*twuB/P 1  
Tilt X tolerance on surface (degrees) 1 x-0O3IIE  
TSTX   1            -0.20000000     0.42678383    -0.11724851     0.20000000     0.42678383    -0.11724851 fpd4 v|(  
Change in Focus                :       0.000000                            0.000000 N]yh8"7X  
Tilt Y tolerance on surface (degrees) 1 yU ?TdM\  
TSTY   1            -0.20000000     0.42678383    -0.11724851     0.20000000     0.42678383    -0.11724851 Er@'X0n  
Change in Focus                :       0.000000                            0.000000 9j'(T:Zs  
Decenter X tolerance on surface 2 g!/O)X3  
TSDX   2            -0.20000000     0.51705427    -0.02697807     0.20000000     0.51705427    -0.02697807 l@
edR)n <  
Change in Focus                :       0.000000                            0.000000 pBo=omQV  
Decenter Y tolerance on surface 2 3a|I| NP  
TSDY   2            -0.20000000     0.51705427    -0.02697807     0.20000000     0.51705427    -0.02697807 "d1~(0=6<m  
Change in Focus                :       0.000000                            0.000000 eI20)t`j  
Tilt X tolerance on surface (degrees) 2 Z=c&</9e  
TSTX   2            -0.20000000     0.35349910    -0.19053324     0.20000000     0.35349910    -0.19053324 K
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Change in Focus                :       0.000000                            0.000000 .J?cV;:`  
Tilt Y tolerance on surface (degrees) 2 Ql2zC9C  
TSTY   2            -0.20000000     0.35349910    -0.19053324     0.20000000     0.35349910    -0.19053324 ~m`j=ot  
Change in Focus                :       0.000000                            0.000000 pi?$h"y7Q  
Decenter X tolerance on surface 3 i n$~(+  
TSDX   3            -0.20000000     0.53419039    -0.00984195     0.20000000     0.53419039    -0.00984195 mbSG  
Change in Focus                :       0.000000                            0.000000 yLpsK[)}\  
Decenter Y tolerance on surface 3 =Oyn<  
TSDY   3            -0.20000000     0.53419039    -0.00984195     0.20000000     0.53419039    -0.00984195 x-E@[=  
Change in Focus                :       0.000000                            0.000000 SM?r
ss.=  
Tilt X tolerance on surface (degrees) 3 mz-sazgV  
TSTX   3            -0.20000000     0.42861670    -0.11541563     0.20000000     0.42861670    -0.11541563 l~mC$>f  
Change in Focus                :       0.000000                            0.000000 9E`Laf  
Tilt Y tolerance on surface (degrees) 3 H\r- ;,&  
TSTY   3            -0.20000000     0.42861670    -0.11541563     0.20000000     0.42861670    -0.11541563 _bsAF^ ;  
Change in Focus                :       0.000000                            0.000000 7{W#i<W  
Irregularity of surface 1 in fringes -] @cUx  
TIRR   1            -0.20000000     0.50973587    -0.03429647     0.20000000     0.57333868     0.02930634 g \;,NW^  
Change in Focus                :       0.000000                            0.000000 Fy#y.jK9v  
Irregularity of surface 2 in fringes ~<.%sVwE  
TIRR   2            -0.20000000     0.53400904    -0.01002330     0.20000000     0.55360281     0.00957047 k-CW?=  
Change in Focus                :       0.000000                            0.000000 9-ei#|Vnt[  
Irregularity of surface 3 in fringes \+iZdZD  
TIRR   3            -0.20000000     0.58078982     0.03675748     0.20000000     0.49904394    -0.04498840 z^,P2kqK_  
Change in Focus                :       0.000000                            0.000000 bukdyo;l  
Index tolerance on surface 1 Nflw
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TIND   1            -0.00100000     0.52606778    -0.01796456     0.00100000     0.56121811     0.01718578 4tA`,}ywPq  
Change in Focus                :       0.000000                            0.000000 [8 I*lsS  
Index tolerance on surface 2 6<t<hP_3O  
TIND   2            -0.00100000     0.55639086     0.01235852     0.00100000     0.53126361    -0.01276872 >~}}*yp  
Change in Focus                :       0.000000                           -0.000000 H`T8ydNXa  
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Worst offenders: DeK&_)g| Z  
Type                      Value      Criterion        Change xoe/I[P]U  
TSTY   2            -0.20000000     0.35349910    -0.19053324 '.gLqm}%  
TSTY   2             0.20000000     0.35349910    -0.19053324 52P^0<Wq  
TSTX   2            -0.20000000     0.35349910    -0.19053324 Y@l>4q")  
TSTX   2             0.20000000     0.35349910    -0.19053324 8-5g6qAS  
TSTY   1            -0.20000000     0.42678383    -0.11724851 {3@"}Eh  
TSTY   1             0.20000000     0.42678383    -0.11724851 n_9Wrx328  
TSTX   1            -0.20000000     0.42678383    -0.11724851 vp|.x |@  
TSTX   1             0.20000000     0.42678383    -0.11724851 ,R$U(,>_0  
TSTY   3            -0.20000000     0.42861670    -0.11541563 tBjMm8lgb  
TSTY   3             0.20000000     0.42861670    -0.11541563 c&"OhzzJK'  
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Estimated Performance Changes based upon Root-Sum-Square method: 49!(Sa_]j  
Nominal MTF                 :     0.54403234 ,>3b|-C-  
Estimated change            :    -0.36299231 p!/ *(TT  
Estimated MTF               :     0.18104003 Nm{J=`  
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Compensator Statistics: 2J&J  
Change in back focus: U6IvN@ g  
Minimum            :        -0.000000 EUmbNV0u  
Maximum            :         0.000000 /P[@o  
Mean               :        -0.000000 dUc?>#TU  
Standard Deviation :         0.000000 WR zIK09@  
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Monte Carlo Analysis: 1 ~s$<  
Number of trials: 20 ;s^F:O  
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Initial Statistics: Normal Distribution {fxytiH8  
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  Trial       Criterion        Change [P3 Z"&  
      1     0.42804416    -0.11598818 g0k{b  
Change in Focus                :      -0.400171 {C'9?4&  
      2     0.54384387    -0.00018847 jRBKy8?[C  
Change in Focus                :       1.018470 *@E&O^%cO  
      3     0.44510003    -0.09893230 ,R*YI  
Change in Focus                :      -0.601922 4"et4Y7  
      4     0.18154684    -0.36248550 F*_ytL  
Change in Focus                :       0.920681 \Lz4ZZjSY  
      5     0.28665820    -0.25737414 |IZ
FWZd  
Change in Focus                :       1.253875 #eY?6Kjn  
      6     0.21263372    -0.33139862 }kF*I@:g  
Change in Focus                :      -0.903878 !{S HlS  
      7     0.40051424    -0.14351809 BDcA_=^R&  
Change in Focus                :      -1.354815 evE$$# 6R  
      8     0.48754161    -0.05649072 !glGW[r/7  
Change in Focus                :       0.215922 &\5%C\0Z<  
      9     0.40357468    -0.14045766 l~#%j( Yo  
Change in Focus                :       0.281783 t}fU 2Yb  
     10     0.26315315    -0.28087919 `7jdV
 
Change in Focus                :      -1.048393 FQBAt0  
     11     0.26120585    -0.28282649 </li<1  
Change in Focus                :       1.017611 (;2]`D [x  
     12     0.24033815    -0.30369419 0#!Z1:Y  
Change in Focus                :      -0.109292 .]LP327u  
     13     0.37164046    -0.17239188 2X`5YN;  
Change in Focus                :      -0.692430 7b hJt_`Q  
     14     0.48597489    -0.05805744 %)}y[ (  
Change in Focus                :      -0.662040 c.Do b?5  
     15     0.21462327    -0.32940907 &-(p~[|  
Change in Focus                :       1.611296 - %`iLu  
     16     0.43378226    -0.11025008 9~6~[z  
Change in Focus                :      -0.640081 D`@*udn=  
     17     0.39321881    -0.15081353 dL|*#e  
Change in Focus                :       0.914906 }
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     18     0.20692530    -0.33710703 0
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Change in Focus                :       0.801607 89l{h8R  
     19     0.51374068    -0.03029165
.WpvDDUK3  
Change in Focus                :       0.947293 r=:o$e  
     20     0.38013374    -0.16389860 }Oe9Zq  
Change in Focus                :       0.667010 5u^;7
1  
1'YksuYx6f  
Number of traceable Monte Carlo files generated: 20 )"H r3  
@W
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Nominal     0.54403234 ?vocI  
Best        0.54384387    Trial     2 ~,O}wT6q  
Worst       0.18154684    Trial     4 Z)dE#A_X  
Mean        0.35770970 (7?jjH^4  
Std Dev     0.11156454 hG qZB  

[a\>"I\[  
Bw*
6X`'Q  
Compensator Statistics: =7 ${bp!  
Change in back focus: .>+jtp}  
Minimum            :        -1.354815 UkgiSv+  
Maximum            :         1.611296 &J}w_BFww  
Mean               :         0.161872 &46Ro|XE`  
Standard Deviation :         0.869664 > @n?W"  
WG(%Pkowv
 
90% >       0.20977951               @Yzc?+x  
80% >       0.22748071              
"&N1$$  
50% >       0.38667627               QP1bm]QYA  
20% >       0.46553746               V8IEfU  
10% >       0.50064115                :P:OQ[$  
r^$WX@ t&  
End of Run. Bw8&Amxx:  
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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 7
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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 -8D$[@y(  
wwh)B92Y5  
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                 oiY&O]}  
80% >       0.22748071                 f0,,<ib.w
 
50% >       0.38667627                 c<J/I_!  
20% >       0.46553746                 UM QsYD)  
10% >       0.50064115 Lp}>WCams  
j/Rm~!q  
最后这个数值是MTF值呢，还是MTF的公差？ -yH8bm'0"  
H^\2,x Z  
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？？？   r:*0)UZlD  
WPzq?yK  
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  : ]$VYzE2e  
90% >       0.20977951                 ?tJyQT  
80% >       0.22748071                 %di]1vQ  
50% >       0.38667627                 .<Lbv5m  
20% >       0.46553746                 1JIo,7  
10% >       0.50064115 A"`^Abrm  
....... !7KSNwGu  

.-Xp]>f,  
CfWtCA  
这些数值都是MTF值

Criterion           : Geometric MTF average S&T at 30.0000 cycles per mm   >brf7h  
Mode                : Sensitivities nS53mLU)  
Sampling            : 2 #ZPU.NNT?  
Nominal Criterion   : 0.54403234 =ca<..yh[d  
Test Wavelength     : 0.6328 Gxtb@`f  
hSO(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？ 8+L,a_q-  
me#?
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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