[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 Q5T(nEA  
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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 L]a|vp  
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图片:2.jpg

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然后运行分析的结果如下： ?xf~!D  
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Analysis of Tolerances QJ6f EV$~  
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File : E:\光学设计资料\zemax练习\f500.ZMX ~vkud+r  
Title: $$/S8LmmK  
Date : TUE JUN 21 2011 "vvFq ,c  
tl2Lq0  
Units are Millimeters. vkh;qPD  
All changes are computed using linear differences. L7[X|zmy*x  
 aeQ{_SK  
Paraxial Focus compensation only. ),z,LU Yf  
<6gU2@1  
WARNING: Solves should be removed prior to tolerancing. s>V*=#L  
8Q+TE;  
Mnemonics: :nTkg[49pJ  
TFRN: Tolerance on curvature in fringes. *Y^5M"AB_  
TTHI: Tolerance on thickness. CVi<~7Am\  
TSDX: Tolerance on surface decentering in x. MEDskvBG  
TSDY: Tolerance on surface decentering in y. CcbWW4 )  
TSTX: Tolerance on surface tilt in x (degrees). KS8\F0q  
TSTY: Tolerance on surface tilt in y (degrees). c '/2F0y  
TIRR: Tolerance on irregularity (fringes). \y<+Fac1S  
TIND: Tolerance on Nd index of refraction. r]xdhR5  
TEDX: Tolerance on element decentering in x. baA HP"  
TEDY: Tolerance on element decentering in y. "P9wT)J_  
TETX: Tolerance on element tilt in x (degrees).  z, :+Oc  
TETY: Tolerance on element tilt in y (degrees). ]q@rGD85K  
s;~J2h[  
WARNING: RAY AIMING IS OFF. Very loose tolerances may not be computed accurately. xXl$Mp7  
d8 3+6d  
WARNING: Boundary constraints on compensators will be ignored. p3i qW,[@  
P2s^=J0@  
Criterion           : Geometric MTF average S&T at 30.0000 cycles per mm 6S` ,j  
Mode                : Sensitivities 8j({=xb
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Sampling            : 2 kemr@_  
Nominal Criterion   : 0.54403234 !NQf< ch  
Test Wavelength     : 0.6328 P1vF{e  
0^_)OsFA  
t(Cq(.u`:  
Fields: XY Symmetric Angle in degrees a?f5(qW3  
#      X-Field      Y-Field       Weight    VDX    VDY    VCX    VCY r5<e}t-  
1   0.000E+000   0.000E+000   1.000E+000  0.000  0.000  0.000  0.000 ]&; G\9$y  
=D;UMSf  
Sensitivity Analysis: xNkwTDN5  
.'+|>6eU  
                 |----------------- Minimum ----------------| |----------------- Maximum ----------------| *&~sr  
Type                      Value      Criterion        Change          Value      Criterion        Change s7X~OF(#  
Fringe tolerance on surface 1 CgaB)`.  
TFRN   1            -1.00000000     0.54257256    -0.00145977     1.00000000     0.54548607     0.00145374 :5n"N5Go  
Change in Focus                :      -0.000000                            0.000000 RJ7/I/yD|  
Fringe tolerance on surface 2  $Adp  
TFRN   2            -1.00000000     0.54177471    -0.00225762     1.00000000     0.54627463     0.00224230 mDe+ M{/  
Change in Focus                :       0.000000                            0.000000 \^^hG5f  
Fringe tolerance on surface 3 ;Ln7_  
TFRN   3            -1.00000000     0.54779866     0.00376632     1.00000000     0.54022572    -0.00380662 rA&#>R`  
Change in Focus                :      -0.000000                            0.000000 KD<; ?oN<O  
Thickness tolerance on surface 1 5Rt0h$_J  
TTHI   1   3        -0.20000000     0.54321462    -0.00081772     0.20000000     0.54484759     0.00081525 EUYa =-  
Change in Focus                :       0.000000                            0.000000 cnjj) c  
Thickness tolerance on surface 2 RF\1.HJG  
TTHI   2   3        -0.20000000     0.54478712     0.00075478     0.20000000     0.54327558    -0.00075675 yQQDGFTb!=  
Change in Focus                :       0.000000                           -0.000000 2e D\_IW  
Decenter X tolerance on surfaces 1 through 3 y("0Xve  
TEDX   1   3        -0.20000000     0.54401464   -1.7700E-005     0.20000000     0.54401464   -1.7700E-005 'KIi!pA.  
Change in Focus                :       0.000000                            0.000000 _|Kv~\G!  
Decenter Y tolerance on surfaces 1 through 3 Z-;uzx  
TEDY   1   3        -0.20000000     0.54401464   -1.7700E-005     0.20000000     0.54401464   -1.7700E-005 4<K ,w{
I  
Change in Focus                :       0.000000                            0.000000 eG2qOq$[  
Tilt X tolerance on surfaces 1 through 3 (degrees) Rh-8//&vZ/  
TETX   1   3        -0.20000000     0.54897548     0.00494314     0.20000000     0.54897548     0.00494314 %<#$:Qb.  
Change in Focus                :       0.000000                            0.000000 IbNTdg]/F`  
Tilt Y tolerance on surfaces 1 through 3 (degrees) <LA`PbQa  
TETY   1   3        -0.20000000     0.54897548     0.00494314     0.20000000     0.54897548     0.00494314 m@ 'I|!^  
Change in Focus                :       0.000000                            0.000000 7 +W?Qo  
Decenter X tolerance on surface 1 +#*z"a`  
TSDX   1            -0.20000000     0.53999563    -0.00403671     0.20000000     0.53999563    -0.00403671 qytGs@p_  
Change in Focus                :       0.000000                            0.000000 H?r;S 5)c  
Decenter Y tolerance on surface 1 J\8l%4q3  
TSDY   1            -0.20000000     0.53999563    -0.00403671     0.20000000     0.53999563    -0.00403671 '<E8<b
i  
Change in Focus                :       0.000000                            0.000000 RX<^MzCDV  
Tilt X tolerance on surface (degrees) 1 MZ+IorZl  
TSTX   1            -0.20000000     0.42678383    -0.11724851     0.20000000     0.42678383    -0.11724851 SO jDtZ  
Change in Focus                :       0.000000                            0.000000 }_D5, k  
Tilt Y tolerance on surface (degrees) 1 (NWN&  
TSTY   1            -0.20000000     0.42678383    -0.11724851     0.20000000     0.42678383    -0.11724851 T4, Zc  
Change in Focus                :       0.000000                            0.000000 (Vv[  
Decenter X tolerance on surface 2 \?ws0Ax  
TSDX   2            -0.20000000     0.51705427    -0.02697807     0.20000000     0.51705427    -0.02697807 p<nBS"/  
Change in Focus                :       0.000000                            0.000000 Q Fqv,B\<  
Decenter Y tolerance on surface 2 %D6Wlf+^n  
TSDY   2            -0.20000000     0.51705427    -0.02697807     0.20000000     0.51705427    -0.02697807 h.+&=s!Nsy  
Change in Focus                :       0.000000                            0.000000 F'_8pD7  
Tilt X tolerance on surface (degrees) 2 <TROs!x$a  
TSTX   2            -0.20000000     0.35349910    -0.19053324     0.20000000     0.35349910    -0.19053324 HG6{`
i  
Change in Focus                :       0.000000                            0.000000 u2\qg;dP  
Tilt Y tolerance on surface (degrees) 2 |JQP7z6j]  
TSTY   2            -0.20000000     0.35349910    -0.19053324     0.20000000     0.35349910    -0.19053324 <"Cwy0V kp  
Change in Focus                :       0.000000                            0.000000 3jdB8a]T_  
Decenter X tolerance on surface 3 ?GfA;O  
TSDX   3            -0.20000000     0.53419039    -0.00984195     0.20000000     0.53419039    -0.00984195 JfINAaboi  
Change in Focus                :       0.000000                            0.000000 $0C/S5b  
Decenter Y tolerance on surface 3 *A9{H>Vq  
TSDY   3            -0.20000000     0.53419039    -0.00984195     0.20000000     0.53419039    -0.00984195 3#ZKuGg=  
Change in Focus                :       0.000000                            0.000000 n&78~@H  
Tilt X tolerance on surface (degrees) 3 _89G2)U=C  
TSTX   3            -0.20000000     0.42861670    -0.11541563     0.20000000     0.42861670    -0.11541563 $u.T1v  
Change in Focus                :       0.000000                            0.000000 : MmXH&yR  
Tilt Y tolerance on surface (degrees) 3 t-'GRme  
TSTY   3            -0.20000000     0.42861670    -0.11541563     0.20000000     0.42861670    -0.11541563 m%(JRh  
Change in Focus                :       0.000000                            0.000000 nMvIL2:3  
Irregularity of surface 1 in fringes v#2qwd3x  
TIRR   1            -0.20000000     0.50973587    -0.03429647     0.20000000     0.57333868     0.02930634 9wJmX<Rm  
Change in Focus                :       0.000000                            0.000000 U8Jj(]},_  
Irregularity of surface 2 in fringes tU2;Wb!Y  
TIRR   2            -0.20000000     0.53400904    -0.01002330     0.20000000     0.55360281     0.00957047 y#0Z[[I0  
Change in Focus                :       0.000000                            0.000000 j1CD;9i)%  
Irregularity of surface 3 in fringes e Em0c]]9  
TIRR   3            -0.20000000     0.58078982     0.03675748     0.20000000     0.49904394    -0.04498840 %}5"5\Zz  
Change in Focus                :       0.000000                            0.000000 _~q^YZ  
Index tolerance on surface 1 )Nd:PnA  
TIND   1            -0.00100000     0.52606778    -0.01796456     0.00100000     0.56121811     0.01718578 EUS]Se2  
Change in Focus                :       0.000000                            0.000000 RSeezP6#  
Index tolerance on surface 2 0J-ux"kfI  
TIND   2            -0.00100000     0.55639086     0.01235852     0.00100000     0.53126361    -0.01276872 %,q#f#  
Change in Focus                :       0.000000                           -0.000000 >A "aOV>K  
ul&7hHp_u%  
Worst offenders:
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Type                      Value      Criterion        Change 54j $A  
TSTY   2            -0.20000000     0.35349910    -0.19053324 \>dG
'  
TSTY   2             0.20000000     0.35349910    -0.19053324 5DUPsV  
TSTX   2            -0.20000000     0.35349910    -0.19053324 HUI!IOh  
TSTX   2             0.20000000     0.35349910    -0.19053324 HliY  
TSTY   1            -0.20000000     0.42678383    -0.11724851 mpAh'f4$*  
TSTY   1             0.20000000     0.42678383    -0.11724851 :6iq{XV^  
TSTX   1            -0.20000000     0.42678383    -0.11724851 m:7bynT{  
TSTX   1             0.20000000     0.42678383    -0.11724851 x G"p.  
TSTY   3            -0.20000000     0.42861670    -0.11541563 % 7:  
TSTY   3             0.20000000     0.42861670    -0.11541563 XArLL5_L  
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Estimated Performance Changes based upon Root-Sum-Square method: En_8H[<%  
Nominal MTF                 :     0.54403234 eajL[W^>  
Estimated change            :    -0.36299231 #(4hX6?5AI  
Estimated MTF               :     0.18104003 Gukq}ZQd  
u)MA#p {  
Compensator Statistics: b#^D8_9
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Change in back focus: t\0JNi$2  
Minimum            :        -0.000000 t!N>0]:mo  
Maximum            :         0.000000 u8=|{)yL  
Mean               :        -0.000000 emO!6]0gJ  
Standard Deviation :         0.000000
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Monte Carlo Analysis: \bE~iz3b9  
Number of trials: 20 xGPv3TLH^  
xB[# a*  
Initial Statistics: Normal Distribution #2=30  
h {btT  
  Trial       Criterion        Change K)Ka"H  
      1     0.42804416    -0.11598818 PxY"{-iAM  
Change in Focus                :      -0.400171 $a1.c;NE'  
      2     0.54384387    -0.00018847 }]@ "t)"  
Change in Focus                :       1.018470 Hc!_o`[{l  
      3     0.44510003    -0.09893230 $5O&[/L  
Change in Focus                :      -0.601922 ?-i&6i6Y  
      4     0.18154684    -0.36248550 9r}}
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Change in Focus                :       0.920681 7T78S&g  
      5     0.28665820    -0.25737414 JH9CN  
Change in Focus                :       1.253875 tO
$M[P=b  
      6     0.21263372    -0.33139862 !;oBvE7Kh  
Change in Focus                :      -0.903878 $^F2  
      7     0.40051424    -0.14351809 i ib-\j4d  
Change in Focus                :      -1.354815 kY&j~R[C  
      8     0.48754161    -0.05649072 C%h_!z":  
Change in Focus                :       0.215922 iLei-\w6y  
      9     0.40357468    -0.14045766 I.x>mN-0  
Change in Focus                :       0.281783 p};<l@  
     10     0.26315315    -0.28087919 5O*$#C;c  
Change in Focus                :      -1.048393 qr1^i1%\  
     11     0.26120585    -0.28282649 IYPI5qCR  
Change in Focus                :       1.017611 )^AO?MW  
     12     0.24033815    -0.30369419 xNU}uW>>T  
Change in Focus                :      -0.109292 >d|W>|8e  
     13     0.37164046    -0.17239188 =s<QN*zJB0  
Change in Focus                :      -0.692430 IFe[3mB5  
     14     0.48597489    -0.05805744 _1QNO#X  
Change in Focus                :      -0.662040 bcg)K`'N  
     15     0.21462327    -0.32940907 JM0)x}]+  
Change in Focus                :       1.611296 IAQ=d4V&  
     16     0.43378226    -0.11025008 ,;;~dfHm  
Change in Focus                :      -0.640081 pK%'S  
     17     0.39321881    -0.15081353 [a2/`ywdV  
Change in Focus                :       0.914906 }z6HxB]$  
     18     0.20692530    -0.33710703 ZO}*^  
Change in Focus                :       0.801607 $onliW|  
     19     0.51374068    -0.03029165 ?IWS  
Change in Focus                :       0.947293 dx#N)?  
     20     0.38013374    -0.16389860 6$Y1[  
Change in Focus                :       0.667010 7Uh}|6PU  
X^`ld&^*({  
Number of traceable Monte Carlo files generated: 20 ~Km8-b(&  
W\/0&H\i  
Nominal     0.54403234 x.aUuC,$x  
Best        0.54384387    Trial     2 Mmn[ol
  
Worst       0.18154684    Trial     4 `*B8IT)  
Mean        0.35770970 j"]%6RwM]  
Std Dev     0.11156454 ;
6Z?O_zp4  
|?8wyP  
Wl{Vz  
Compensator Statistics: ?k-IS5G  
Change in back focus: gNJ\*]SY  
Minimum            :        -1.354815 QLn5:&  
Maximum            :         1.611296 UqH7ec  
Mean               :         0.161872 Pj$a$C`Z  
Standard Deviation :         0.869664 *)Y;`Yg$  
BFY~::<b  
90% >       0.20977951               5|Uub,  
80% >       0.22748071               W cnYD)  
50% >       0.38667627               6 J#C  
20% >       0.46553746               ZD*>i=S  
10% >       0.50064115                c?|/c9f  
a v/=x  
End of Run. ^^Y0 \3.  
cIH`,bR  
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$v@Tvnre  

图片:3.JPG

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m1TPy-|1  
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 }k%>%xQ.  
6eb5q/  
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                 luV%_[F  
80% >       0.22748071                 am`eist:  
50% >       0.38667627                 L%fWa2P'  
20% >       0.46553746                 }D0j%~&"e  
10% >       0.50064115 z%b3/rx  
a"~W1|JC"  
最后这个数值是MTF值呢，还是MTF的公差？ z8A`BVqI  
ow+
NT  
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？？？   h1,J<B@  
Y~Zg^x2  
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  : ("wPkm^  
90% >       0.20977951                
|(Io(e  
80% >       0.22748071                 BYP,}yzA  
50% >       0.38667627                 ?^0#:QevC  
20% >       0.46553746                 -H{c@hl  
10% >       0.50064115 m&b!\"0  
....... ptYQP^6S[  

L2AZ0E"ub  
[96|xe\s  
这些数值都是MTF值

Criterion           : Geometric MTF average S&T at 30.0000 cycles per mm   O zY&^:>  
Mode                : Sensitivities %F1 Ce/  
Sampling            : 2 w9l)=[s=  
Nominal Criterion   : 0.54403234 xs+MvXTC  
Test Wavelength     : 0.6328 (T!Q
 
n+j'FfSz  
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？ YM/^-[k3  
=AGsW  
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