[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 o/& IT(v  
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图片:1.JPG

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'X`W+=T$  
然后添加了默认公差分析，基本没变 lNTbd"}$:  
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图片:2.jpg

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然后运行分析的结果如下： x~K79Mya  
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Analysis of Tolerances 7xfS%'=y"  
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File : E:\光学设计资料\zemax练习\f500.ZMX YPA$38  
Title: #$F*.vQSs+  
Date : TUE JUN 21 2011 /Pg)@*~  
Q 9E.AN  
Units are Millimeters. gEw9<Y  
All changes are computed using linear differences. U2v;GIo$yU  
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Paraxial Focus compensation only. (6b0rqPF  
@Gy.p5J8  
WARNING: Solves should be removed prior to tolerancing. amQTPNI  
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Mnemonics: /!qP=ngw9  
TFRN: Tolerance on curvature in fringes. 7 D{%  
TTHI: Tolerance on thickness. ce; zn\  
TSDX: Tolerance on surface decentering in x. 0& ?L%Y  
TSDY: Tolerance on surface decentering in y. #T@k(Bz{L  
TSTX: Tolerance on surface tilt in x (degrees). Ul}<@d9: B  
TSTY: Tolerance on surface tilt in y (degrees). lS#^v#uS  
TIRR: Tolerance on irregularity (fringes). Ey=}bBx  
TIND: Tolerance on Nd index of refraction. 5>ktr)]  
TEDX: Tolerance on element decentering in x. B{p74 >  
TEDY: Tolerance on element decentering in y. dGz4`1(>  
TETX: Tolerance on element tilt in x (degrees). B#cN'1c  
TETY: Tolerance on element tilt in y (degrees). @4]{ZUV  
c _!!DEe7  
WARNING: RAY AIMING IS OFF. Very loose tolerances may not be computed accurately. iio-RT?!  
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WARNING: Boundary constraints on compensators will be ignored. qw>vu7/z  
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Criterion           : Geometric MTF average S&T at 30.0000 cycles per mm 4C;y2`C  
Mode                : Sensitivities 2+Oz$9`.  
Sampling            : 2 a6O <t;&  
Nominal Criterion   : 0.54403234 <lL
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Test Wavelength     : 0.6328 !Ce!D0Tx  
sZ;Gb^{Z  
X{<taD2~  
Fields: XY Symmetric Angle in degrees y,bDi9*|  
#      X-Field      Y-Field       Weight    VDX    VDY    VCX    VCY ! h92dH  
1   0.000E+000   0.000E+000   1.000E+000  0.000  0.000  0.000  0.000 upX@8WxR  
_pDfPLlY&  
Sensitivity Analysis: U<E]c 4*  
B|,d  
                 |----------------- Minimum ----------------| |----------------- Maximum ----------------| 1 -C~C]&  
Type                      Value      Criterion        Change          Value      Criterion        Change FCWk8/  
Fringe tolerance on surface 1 +S`cUn7  
TFRN   1            -1.00000000     0.54257256    -0.00145977     1.00000000     0.54548607     0.00145374 9!kp3x/`  
Change in Focus                :      -0.000000                            0.000000 <XtE|LG  
Fringe tolerance on surface 2 j%Xa8$  
TFRN   2            -1.00000000     0.54177471    -0.00225762     1.00000000     0.54627463     0.00224230 6> z{xYat  
Change in Focus                :       0.000000                            0.000000 yz5! >|EB  
Fringe tolerance on surface 3 L#
J2J$=  
TFRN   3            -1.00000000     0.54779866     0.00376632     1.00000000     0.54022572    -0.00380662 vU]n0)<KB  
Change in Focus                :      -0.000000                            0.000000 Y*\N{6$2  
Thickness tolerance on surface 1 7#NHPn  
TTHI   1   3        -0.20000000     0.54321462    -0.00081772     0.20000000     0.54484759     0.00081525 ~*9Ue@  
Change in Focus                :       0.000000                            0.000000 .U44p*I  
Thickness tolerance on surface 2 W0Y ,3;
0  
TTHI   2   3        -0.20000000     0.54478712     0.00075478     0.20000000     0.54327558    -0.00075675 x+;y0`oL  
Change in Focus                :       0.000000                           -0.000000 %g{)K)$,ui  
Decenter X tolerance on surfaces 1 through 3 1N:~5S}s>  
TEDX   1   3        -0.20000000     0.54401464   -1.7700E-005     0.20000000     0.54401464   -1.7700E-005 t`R{N1  
Change in Focus                :       0.000000                            0.000000 Q'JK *.l  
Decenter Y tolerance on surfaces 1 through 3 *'-t_F';  
TEDY   1   3        -0.20000000     0.54401464   -1.7700E-005     0.20000000     0.54401464   -1.7700E-005 e+D]9wM8  
Change in Focus                :       0.000000                            0.000000 "tK|/R+  
Tilt X tolerance on surfaces 1 through 3 (degrees) 57 Bx-  
TETX   1   3        -0.20000000     0.54897548     0.00494314     0.20000000     0.54897548     0.00494314 K
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Change in Focus                :       0.000000                            0.000000 qxsHhyB_n;  
Tilt Y tolerance on surfaces 1 through 3 (degrees) PxGw5:  
TETY   1   3        -0.20000000     0.54897548     0.00494314     0.20000000     0.54897548     0.00494314 GZKYRPg  
Change in Focus                :       0.000000                            0.000000 <;O^3_'  
Decenter X tolerance on surface 1 ^FkB/j  
TSDX   1            -0.20000000     0.53999563    -0.00403671     0.20000000     0.53999563    -0.00403671 :Fu7T1  
Change in Focus                :       0.000000                            0.000000 VX>j2Z'  
Decenter Y tolerance on surface 1 G%AO%II  
TSDY   1            -0.20000000     0.53999563    -0.00403671     0.20000000     0.53999563    -0.00403671 9I;~P &  
Change in Focus                :       0.000000                            0.000000 4*Gv0#dga  
Tilt X tolerance on surface (degrees) 1 ~G-W|>  
TSTX   1            -0.20000000     0.42678383    -0.11724851     0.20000000     0.42678383    -0.11724851 TA2ETvz^  
Change in Focus                :       0.000000                            0.000000
4y?n62N8$  
Tilt Y tolerance on surface (degrees) 1 &/ED.K  
TSTY   1            -0.20000000     0.42678383    -0.11724851     0.20000000     0.42678383    -0.11724851 yT5OFD|T  
Change in Focus                :       0.000000                            0.000000 S'kgpF"bm  
Decenter X tolerance on surface 2 BzkfB:wr  
TSDX   2            -0.20000000     0.51705427    -0.02697807     0.20000000     0.51705427    -0.02697807 gIusp917  
Change in Focus                :       0.000000                            0.000000 a]xGzv5  
Decenter Y tolerance on surface 2 `b]wyP  
TSDY   2            -0.20000000     0.51705427    -0.02697807     0.20000000     0.51705427    -0.02697807 VZ=:`)  
Change in Focus                :       0.000000                            0.000000 K~I?i/P=z  
Tilt X tolerance on surface (degrees) 2 6vR6=@(`>  
TSTX   2            -0.20000000     0.35349910    -0.19053324     0.20000000     0.35349910    -0.19053324 XWQ
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Change in Focus                :       0.000000                            0.000000 R=&-nC5e  
Tilt Y tolerance on surface (degrees) 2 !{+.)%d'g  
TSTY   2            -0.20000000     0.35349910    -0.19053324     0.20000000     0.35349910    -0.19053324 c@"FV,L>  
Change in Focus                :       0.000000                            0.000000  s2wDJ|  
Decenter X tolerance on surface 3 ,+4T7 UR  
TSDX   3            -0.20000000     0.53419039    -0.00984195     0.20000000     0.53419039    -0.00984195 JbS[(+o  
Change in Focus                :       0.000000                            0.000000 ;1{=t!z=  
Decenter Y tolerance on surface 3 QKB+mjMH#x  
TSDY   3            -0.20000000     0.53419039    -0.00984195     0.20000000     0.53419039    -0.00984195 *hJWuMfY,  
Change in Focus                :       0.000000                            0.000000 UcOP 0_/  
Tilt X tolerance on surface (degrees) 3 \w>Rmf'
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TSTX   3            -0.20000000     0.42861670    -0.11541563     0.20000000     0.42861670    -0.11541563 UB~-$\.  
Change in Focus                :       0.000000                            0.000000 :KA)4[#;W  
Tilt Y tolerance on surface (degrees) 3 $/tj<++W  
TSTY   3            -0.20000000     0.42861670    -0.11541563     0.20000000     0.42861670    -0.11541563 b;5j awG  
Change in Focus                :       0.000000                            0.000000 -,T!/E  
Irregularity of surface 1 in fringes wet[f{c  
TIRR   1            -0.20000000     0.50973587    -0.03429647     0.20000000     0.57333868     0.02930634 g,!.`[e'ex  
Change in Focus                :       0.000000                            0.000000 iLNUydiS  
Irregularity of surface 2 in fringes 1[u{y{9 q  
TIRR   2            -0.20000000     0.53400904    -0.01002330     0.20000000     0.55360281     0.00957047 doHE]gC2Uz  
Change in Focus                :       0.000000                            0.000000 PnInsf%;  
Irregularity of surface 3 in fringes KK2YT/K$SG  
TIRR   3            -0.20000000     0.58078982     0.03675748     0.20000000     0.49904394    -0.04498840 -]Su+/3(,  
Change in Focus                :       0.000000                            0.000000 JGTsVa2  
Index tolerance on surface 1 {wj%WSQj/y  
TIND   1            -0.00100000     0.52606778    -0.01796456     0.00100000     0.56121811     0.01718578 }2"W0ZdWD  
Change in Focus                :       0.000000                            0.000000 SZ9DT  
Index tolerance on surface 2 _ahp7-O  
TIND   2            -0.00100000     0.55639086     0.01235852     0.00100000     0.53126361    -0.01276872 AWx@Z7\z"g  
Change in Focus                :       0.000000                           -0.000000 W02z}"#  
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Worst offenders: KsE$^`  
Type                      Value      Criterion        Change v;9(FLtL  
TSTY   2            -0.20000000     0.35349910    -0.19053324 ;-@: }/  
TSTY   2             0.20000000     0.35349910    -0.19053324 o:W*#dt
 
TSTX   2            -0.20000000     0.35349910    -0.19053324 L6Brs"9B  
TSTX   2             0.20000000     0.35349910    -0.19053324 1zH?.-  
TSTY   1            -0.20000000     0.42678383    -0.11724851 :i& 9}\|,  
TSTY   1             0.20000000     0.42678383    -0.11724851 3*2~#dh=  
TSTX   1            -0.20000000     0.42678383    -0.11724851 9T5 F0?qd  
TSTX   1             0.20000000     0.42678383    -0.11724851 jOrfI-&.G  
TSTY   3            -0.20000000     0.42861670    -0.11541563 l&U$LN$*e  
TSTY   3             0.20000000     0.42861670    -0.11541563 0m4M@94  
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Estimated Performance Changes based upon Root-Sum-Square method: 4:NMZ `~  
Nominal MTF                 :     0.54403234 l5Ko9CG  
Estimated change            :    -0.36299231 8a)Brl}u  
Estimated MTF               :     0.18104003 H1B%}G*Ir-  
7x>^ip"7  
Compensator Statistics: T)7U+~nQ"  
Change in back focus: 5$'[R;r  
Minimum            :        -0.000000 b~:)d>s8wY  
Maximum            :         0.000000 OZe&p  
Mean               :        -0.000000 R@z`  
Standard Deviation :         0.000000 ;hO6 p  
BlU&=;#r5>  
Monte Carlo Analysis: !E?+1WDS0  
Number of trials: 20 nb=mY&q}~  
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Initial Statistics: Normal Distribution 'G>XI;g  
M.}J SDt  
  Trial       Criterion        Change P658 XKE  
      1     0.42804416    -0.11598818 !37I2*
+4  
Change in Focus                :      -0.400171 1uj~/M  
      2     0.54384387    -0.00018847 0Atha>w^o~  
Change in Focus                :       1.018470 SsW<,T  
      3     0.44510003    -0.09893230 7:pc%Ksq  
Change in Focus                :      -0.601922 }BI6dZ~2A  
      4     0.18154684    -0.36248550 {m~)~/z?  
Change in Focus                :       0.920681 R@jMFh;  
      5     0.28665820    -0.25737414 'q$Ym0nL  
Change in Focus                :       1.253875 QJ(%rvn3  
      6     0.21263372    -0.33139862 vu^mLc  
Change in Focus                :      -0.903878 z{ V;bi;  
      7     0.40051424    -0.14351809 G>0d^bx;E  
Change in Focus                :      -1.354815 oj Y.6w  
      8     0.48754161    -0.05649072 Q;y5E`G  
Change in Focus                :       0.215922 W0sL
MHq  
      9     0.40357468    -0.14045766 tB~#;:g  
Change in Focus                :       0.281783 }aE'  
     10     0.26315315    -0.28087919 8CUtY9.  
Change in Focus                :      -1.048393 iD|~$<9o  
     11     0.26120585    -0.28282649 /96lvn]8lO  
Change in Focus                :       1.017611 \}=T4w-e  
     12     0.24033815    -0.30369419 (:OMt2{r  
Change in Focus                :      -0.109292 R3_OCM_*  
     13     0.37164046    -0.17239188 p@f #fs  
Change in Focus                :      -0.692430 jGz~}&B  
     14     0.48597489    -0.05805744 GLecB
F+>F  
Change in Focus                :      -0.662040 4Xa]yA =  
     15     0.21462327    -0.32940907 u_' -vZ_  
Change in Focus                :       1.611296 iv+a5  
     16     0.43378226    -0.11025008 Q%d%Io\-t  
Change in Focus                :      -0.640081 "Ux(n
t  
     17     0.39321881    -0.15081353 u3O@ccJ;  
Change in Focus                :       0.914906 83Rs1}*  
     18     0.20692530    -0.33710703 H i8V=+  
Change in Focus                :       0.801607 B//*hH >F  
     19     0.51374068    -0.03029165 _d3Z~cH  
Change in Focus                :       0.947293 ^;a .;wR  
     20     0.38013374    -0.16389860 ( `bb1g
z  
Change in Focus                :       0.667010 M KW~rrR  
.uauSx/#4  
Number of traceable Monte Carlo files generated: 20 -F`GZ  
8=L"rekV_  
Nominal     0.54403234 Bh=t%#y|`  
Best        0.54384387    Trial     2 8j70X <R  
Worst       0.18154684    Trial     4 uXFI7vV6P  
Mean        0.35770970 _`;KmD&5  
Std Dev     0.11156454 Ot-P J i  
duEXp]f!  
|=YK2};  
Compensator Statistics: &Hp*A^M  
Change in back focus: 4y3c=L No  
Minimum            :        -1.354815 ^uUA41o`eJ  
Maximum            :         1.611296 
V? tH/P  
Mean               :         0.161872 zCo$YP#5_  
Standard Deviation :         0.869664 qqZ4K:oC,  
Gn^lF7yE  
90% >       0.20977951               ,}'
8. f  
80% >       0.22748071               PjBAf'  
50% >       0.38667627               W+Mw:,>*s  
20% >       0.46553746               4w ,&#L  
10% >       0.50064115                Pv2uZH(  
|s/N?/qi  
End of Run. Q >[>{N&\  
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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 0~BaQ, A@  

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 HoAg8siQ  
9;6)b0=$  
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                 P^F3,'N  
80% >       0.22748071                 EgPL+qL  
50% >       0.38667627                 jG&HPVr  
20% >       0.46553746                 [!;sp~  
10% >       0.50064115 VOr:G85*s  
8%;Wyqdf]  
最后这个数值是MTF值呢，还是MTF的公差？ }X8P5c!\  
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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？？？   .u ikte  
V Zbn@1  
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  : Qh
Tn9S:D  
90% >       0.20977951                 5ad@}7&  
80% >       0.22748071                 .EWjeVq  
50% >       0.38667627                 #+Bz$CO  
20% >       0.46553746                 DU,B  
10% >       0.50064115 R=Ig !s9  
....... 7Cz=;  

b(U5n"cdA  
$_'<kH-eP  
这些数值都是MTF值

Criterion           : Geometric MTF average S&T at 30.0000 cycles per mm   3zfiegY@wm  
Mode                : Sensitivities |Om][z  
Sampling            : 2 *h?}~!AjY  
Nominal Criterion   : 0.54403234 7,?ai6{  
Test Wavelength     : 0.6328 Y*lc ~X  
wS$ 'gKA6  
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？ (yEU9R$I"  
J7EWaXGbz  
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