[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 &fWYQ'\>  
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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 t=oTU,<  
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图片:2.jpg

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然后运行分析的结果如下： I@9k+JB
  
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Analysis of Tolerances zMQ|j_l9E  
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File : E:\光学设计资料\zemax练习\f500.ZMX :ift{XR'  
Title: 3Q"4-pd  
Date : TUE JUN 21 2011 d ;W(Vm6  
{,rVA(I@  
Units are Millimeters. u6(>?r-  
All changes are computed using linear differences. L(!mm  
zSFqy'b.M-  
Paraxial Focus compensation only. S\O6B1<:  
=!%+ sem  
WARNING: Solves should be removed prior to tolerancing. y~\K~qjd  
(j;6}@  
Mnemonics: ?krgZ;Jj  
TFRN: Tolerance on curvature in fringes. y}bE'Od  
TTHI: Tolerance on thickness. H:HJHd"W  
TSDX: Tolerance on surface decentering in x. H|iY<7@  
TSDY: Tolerance on surface decentering in y. 4aQb+t,  
TSTX: Tolerance on surface tilt in x (degrees). 13nXvYo'  
TSTY: Tolerance on surface tilt in y (degrees). W!BIz&SY:-  
TIRR: Tolerance on irregularity (fringes). m*S[oy&  
TIND: Tolerance on Nd index of refraction. zbDM+;  
TEDX: Tolerance on element decentering in x. yy6?16@  
TEDY: Tolerance on element decentering in y. ard<T}|N  
TETX: Tolerance on element tilt in x (degrees). SlZ>N$E  
TETY: Tolerance on element tilt in y (degrees). *!*J5/b  
4W''j[Y/  
WARNING: RAY AIMING IS OFF. Very loose tolerances may not be computed accurately. Ih.6"ISK}  
a jCx"J  
WARNING: Boundary constraints on compensators will be ignored. ;9hi2_luV  
C%csQ m  
Criterion           : Geometric MTF average S&T at 30.0000 cycles per mm DEw_dOJ(  
Mode                : Sensitivities +L86w7  
Sampling            : 2 >9.xFiq<  
Nominal Criterion   : 0.54403234 ^^I3%6UY  
Test Wavelength     : 0.6328 *XK9-%3  
I(dMiL  
!be6}  
Fields: XY Symmetric Angle in degrees hd2 X/"  
#      X-Field      Y-Field       Weight    VDX    VDY    VCX    VCY .hxcx>%  
1   0.000E+000   0.000E+000   1.000E+000  0.000  0.000  0.000  0.000 f:h.O# d>  
kMHupROj  
Sensitivity Analysis: =U5lPsiv,3  
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                 |----------------- Minimum ----------------| |----------------- Maximum ----------------| 89@e &h*  
Type                      Value      Criterion        Change          Value      Criterion        Change 0}UJP   
Fringe tolerance on surface 1 ,rp-`E5ap  
TFRN   1            -1.00000000     0.54257256    -0.00145977     1.00000000     0.54548607     0.00145374 ~\%MJ3  
Change in Focus                :      -0.000000                            0.000000 I9`R LSn  
Fringe tolerance on surface 2 =;/4j'1}9  
TFRN   2            -1.00000000     0.54177471    -0.00225762     1.00000000     0.54627463     0.00224230 jy] hP?QG  
Change in Focus                :       0.000000                            0.000000 @JWoF^U  
Fringe tolerance on surface 3 D %`64R  
TFRN   3            -1.00000000     0.54779866     0.00376632     1.00000000     0.54022572    -0.00380662 bg'B^E3  
Change in Focus                :      -0.000000                            0.000000 _|S>,D'  
Thickness tolerance on surface 1 XLK#=YTI  
TTHI   1   3        -0.20000000     0.54321462    -0.00081772     0.20000000     0.54484759     0.00081525 ,))UQ7N  
Change in Focus                :       0.000000                            0.000000 .Y%)&  
Thickness tolerance on surface 2 p0xd c3  
TTHI   2   3        -0.20000000     0.54478712     0.00075478     0.20000000     0.54327558    -0.00075675 Ok+zUA[Wu  
Change in Focus                :       0.000000                           -0.000000 rdsm /^,s  
Decenter X tolerance on surfaces 1 through 3 av(d0E}}b  
TEDX   1   3        -0.20000000     0.54401464   -1.7700E-005     0.20000000     0.54401464   -1.7700E-005 \vB-0w  
Change in Focus                :       0.000000                            0.000000 IPU'M*|Q  
Decenter Y tolerance on surfaces 1 through 3 )K8k3]y&  
TEDY   1   3        -0.20000000     0.54401464   -1.7700E-005     0.20000000     0.54401464   -1.7700E-005 4'W|'4'b  
Change in Focus                :       0.000000                            0.000000 fn zj@_{|  
Tilt X tolerance on surfaces 1 through 3 (degrees) zn T85#]\@  
TETX   1   3        -0.20000000     0.54897548     0.00494314     0.20000000     0.54897548     0.00494314 %:n1S]Vr  
Change in Focus                :       0.000000                            0.000000 &X +Qi  
Tilt Y tolerance on surfaces 1 through 3 (degrees) l[O!_bH  
TETY   1   3        -0.20000000     0.54897548     0.00494314     0.20000000     0.54897548     0.00494314 {R7>-Y[4)2  
Change in Focus                :       0.000000                            0.000000 .#
uRJo%8  
Decenter X tolerance on surface 1 WYQJ+z5  
TSDX   1            -0.20000000     0.53999563    -0.00403671     0.20000000     0.53999563    -0.00403671 {_1^ GIIS  
Change in Focus                :       0.000000                            0.000000 /LM*nN$%  
Decenter Y tolerance on surface 1 ~y}M GUEC  
TSDY   1            -0.20000000     0.53999563    -0.00403671     0.20000000     0.53999563    -0.00403671 8u$Krq  
Change in Focus                :       0.000000                            0.000000 ObIi$uJX  
Tilt X tolerance on surface (degrees) 1 FDaHsiI:  
TSTX   1            -0.20000000     0.42678383    -0.11724851     0.20000000     0.42678383    -0.11724851 %Yg;s'F>#q  
Change in Focus                :       0.000000                            0.000000 }(AUe5aw`G  
Tilt Y tolerance on surface (degrees) 1 aW7{T6
.,  
TSTY   1            -0.20000000     0.42678383    -0.11724851     0.20000000     0.42678383    -0.11724851 ;^:9huN  
Change in Focus                :       0.000000                            0.000000 p3:x\P<|  
Decenter X tolerance on surface 2 .9Bimhc6K  
TSDX   2            -0.20000000     0.51705427    -0.02697807     0.20000000     0.51705427    -0.02697807 :4h4vp<  
Change in Focus                :       0.000000                            0.000000 ?#xNz=V  
Decenter Y tolerance on surface 2 v#.FK:u}  
TSDY   2            -0.20000000     0.51705427    -0.02697807     0.20000000     0.51705427    -0.02697807 xDu11W+g  
Change in Focus                :       0.000000                            0.000000 kL^
;^!Nt  
Tilt X tolerance on surface (degrees) 2 H*3f8A&@s  
TSTX   2            -0.20000000     0.35349910    -0.19053324     0.20000000     0.35349910    -0.19053324 d3T|N\(DL  
Change in Focus                :       0.000000                            0.000000 >U^AIaW  
Tilt Y tolerance on surface (degrees) 2 {nT !|S)$  
TSTY   2            -0.20000000     0.35349910    -0.19053324     0.20000000     0.35349910    -0.19053324 v@;:aN  
Change in Focus                :       0.000000                            0.000000 p2
PD';"  
Decenter X tolerance on surface 3 .s|n}{D_i  
TSDX   3            -0.20000000     0.53419039    -0.00984195     0.20000000     0.53419039    -0.00984195 6g!#"=ls;  
Change in Focus                :       0.000000                            0.000000 FpE83}@".w  
Decenter Y tolerance on surface 3 9Ps:]Kp!vN  
TSDY   3            -0.20000000     0.53419039    -0.00984195     0.20000000     0.53419039    -0.00984195 #6_?7 (X  
Change in Focus                :       0.000000                            0.000000 3O<<XXar  
Tilt X tolerance on surface (degrees) 3 /a6\G.C5  
TSTX   3            -0.20000000     0.42861670    -0.11541563     0.20000000     0.42861670    -0.11541563 ~)D2U:"^xm  
Change in Focus                :       0.000000                            0.000000 z.eqOPW  
Tilt Y tolerance on surface (degrees) 3 Ly\$?3h  
TSTY   3            -0.20000000     0.42861670    -0.11541563     0.20000000     0.42861670    -0.11541563 C/e`O|G  
Change in Focus                :       0.000000                            0.000000 a
=gTGG"9  
Irregularity of surface 1 in fringes ?]f+)tCMs  
TIRR   1            -0.20000000     0.50973587    -0.03429647     0.20000000     0.57333868     0.02930634 -B$oq8)n*  
Change in Focus                :       0.000000                            0.000000 <\?ySto  
Irregularity of surface 2 in fringes ~R/7J{Sg  
TIRR   2            -0.20000000     0.53400904    -0.01002330     0.20000000     0.55360281     0.00957047 4QK([q  
Change in Focus                :       0.000000                            0.000000 4pkc9\  
Irregularity of surface 3 in fringes &qFdP'E;$  
TIRR   3            -0.20000000     0.58078982     0.03675748     0.20000000     0.49904394    -0.04498840 [X)+(-J  
Change in Focus                :       0.000000                            0.000000 ;=hl!CB  
Index tolerance on surface 1 8nQlmWpJ  
TIND   1            -0.00100000     0.52606778    -0.01796456     0.00100000     0.56121811     0.01718578 Gp$[u4-6M6  
Change in Focus                :       0.000000                            0.000000 ~*Ve>4  
Index tolerance on surface 2 eg)=^b  
TIND   2            -0.00100000     0.55639086     0.01235852     0.00100000     0.53126361    -0.01276872 C;wN>HE  
Change in Focus                :       0.000000                           -0.000000 JJ,Fh .  
.%3bXK+F  
Worst offenders: ~.AUy%$_g+  
Type                      Value      Criterion        Change b`E0tZcJ  
TSTY   2            -0.20000000     0.35349910    -0.19053324 R+gh 2 6e  
TSTY   2             0.20000000     0.35349910    -0.19053324 o&g=Z4jj<  
TSTX   2            -0.20000000     0.35349910    -0.19053324 5wRDH1z@{  
TSTX   2             0.20000000     0.35349910    -0.19053324 ;e()|  
TSTY   1            -0.20000000     0.42678383    -0.11724851 (SoV2[|  
TSTY   1             0.20000000     0.42678383    -0.11724851 k$}XZ,Q  
TSTX   1            -0.20000000     0.42678383    -0.11724851 1@E<5rp o  
TSTX   1             0.20000000     0.42678383    -0.11724851 dI-=0v-|  
TSTY   3            -0.20000000     0.42861670    -0.11541563 CBs0>M/  
TSTY   3             0.20000000     0.42861670    -0.11541563 5)V J  
 nq8mzI  
Estimated Performance Changes based upon Root-Sum-Square method: I5Foh|)  
Nominal MTF                 :     0.54403234 Q0,]Q ]_  
Estimated change            :    -0.36299231 FM0)/6I'x  
Estimated MTF               :     0.18104003 ~y_TT5+3  
xv's52x  
Compensator Statistics: ]0xbvJ8oK  
Change in back focus: e<l Wel  
Minimum            :        -0.000000 %#02Z%?%  
Maximum            :         0.000000 c_O|?1  
Mean               :        -0.000000 g$?B!!qT  
Standard Deviation :         0.000000 X82sw>Y  
Dq*>+1eW2  
Monte Carlo Analysis: +=|Q'V  
Number of trials: 20 /Y:_qsO1  
sJ7r9O`x  
Initial Statistics: Normal Distribution %&4sHDP  
+G?4Wc1  
  Trial       Criterion        Change 8G1Tpn  
      1     0.42804416    -0.11598818 5ts8o&|   
Change in Focus                :      -0.400171 Vg\EAs>f  
      2     0.54384387    -0.00018847 KZ`d3ad  
Change in Focus                :       1.018470 7}%3Aw6]S  
      3     0.44510003    -0.09893230 k:Uyez  
Change in Focus                :      -0.601922 %K;,qS'N_  
      4     0.18154684    -0.36248550 %xyt4}-)m  
Change in Focus                :       0.920681 g*
b%  
      5     0.28665820    -0.25737414 ToCB*GlL  
Change in Focus                :       1.253875 st|$Fu  
      6     0.21263372    -0.33139862 IJs*zzR  
Change in Focus                :      -0.903878 g/mVd;#o  
      7     0.40051424    -0.14351809 JQ%e'  
Change in Focus                :      -1.354815 W
A8Qt\Q  
      8     0.48754161    -0.05649072 7cr+a4T33  
Change in Focus                :       0.215922 lK9us  
      9     0.40357468    -0.14045766 ]b.@i&M  
Change in Focus                :       0.281783 gr4Hh/V
 
     10     0.26315315    -0.28087919 Od>Ta_  
Change in Focus                :      -1.048393 O=MO M  
     11     0.26120585    -0.28282649 ]3NH[&+  
Change in Focus                :       1.017611 )mB+#T<k-  
     12     0.24033815    -0.30369419 %TPnC'2  
Change in Focus                :      -0.109292 |5Mhrb4.  
     13     0.37164046    -0.17239188 %QVX1\>]  
Change in Focus                :      -0.692430 /.aZXC$]  
     14     0.48597489    -0.05805744 9&g//JlD  
Change in Focus                :      -0.662040 vZTX3c:,1  
     15     0.21462327    -0.32940907 /wKW  
Change in Focus                :       1.611296 :7e2O!zH_  
     16     0.43378226    -0.11025008 {|^9y]VFu  
Change in Focus                :      -0.640081 82YTd(yB
 
     17     0.39321881    -0.15081353 8 %Lq~lk  
Change in Focus                :       0.914906 :tedtV~  
     18     0.20692530    -0.33710703 AVOzx00U  
Change in Focus                :       0.801607 f%an<>j^w  
     19     0.51374068    -0.03029165 TC
X*$ac"  
Change in Focus                :       0.947293 f:B+R  
     20     0.38013374    -0.16389860 E O52 E|  
Change in Focus                :       0.667010 .D-}2<z  
Nw+0b4{  
Number of traceable Monte Carlo files generated: 20 
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}wC pr.@  
Nominal     0.54403234 aM9^V MOb  
Best        0.54384387    Trial     2 kmi[u8iXD_  
Worst       0.18154684    Trial     4 SWz+.W{KQ"  
Mean        0.35770970 NC>rZS]  
Std Dev     0.11156454 {e/12q  
q+
19EJ(  
wlAlIvIT  
Compensator Statistics: yXh=~:1~  
Change in back focus: ivb&J4?y  
Minimum            :        -1.354815 >e/;  
Maximum            :         1.611296 w+=>b  
Mean               :         0.161872 !<h*\%;  
Standard Deviation :         0.869664 !Z YMks4  
!?DPI)  
90% >       0.20977951               <dV|N$WV  
80% >       0.22748071               _.' j'j%  
50% >       0.38667627               ~x)Awdlu  
20% >       0.46553746               `ihlKFX  
10% >       0.50064115                W|NzdxCY  
f` 2W}|(jA  
End of Run. O/e5LA  
`l9Pk\X[  
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 I?G m  

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 YjdCCju  
fZ`b~ZBwIj  
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                 luAC
dC  
80% >       0.22748071                 qZ
'&zB)  
50% >       0.38667627                 #K.OJJaG  
20% >       0.46553746                 OCnQSkj  
10% >       0.50064115 _<yGen-  
5<wIJ5t  
最后这个数值是MTF值呢，还是MTF的公差？ }b)7gd=  
O68/Hf1W  
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？？？   0-M.>fwZ=  
W&#Ps6)8  
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  : En-BT0o  
90% >       0.20977951                 t$+[(}@+  
80% >       0.22748071                 QE8;Jk-  
50% >       0.38667627                 *O6q=yg;K:  
20% >       0.46553746                 N;N,5rxV  
10% >       0.50064115 93I.Wp_{  
....... cl3@+v1  

mtfEK3?2*  
]1YyP  
这些数值都是MTF值

Criterion           : Geometric MTF average S&T at 30.0000 cycles per mm   cow]qe6K  
Mode                : Sensitivities d4(!9O.\  
Sampling            : 2 -%I 0Q  
Nominal Criterion   : 0.54403234 #0*OkZMt  
Test Wavelength     : 0.6328 (>.+tq}  
JY6&CL`C  
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？ &uX|Ksq  
1ig#|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