[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 EL3X8H  
\v-I<"::  

图片:1.JPG

)HE{`yiLL  
P<&bAsje  
然后添加了默认公差分析，基本没变 l59\Lo:  
\)uA:v  

图片:2.jpg

D )`(b  
9Xg7=(#  
然后运行分析的结果如下： r?[[.zm"7  
hL/u5h%$  
Analysis of Tolerances 1gBLJ0q  
m0^ "fMV  
File : E:\光学设计资料\zemax练习\f500.ZMX ELnUpmv\  
Title: qZ[HILh!  
Date : TUE JUN 21 2011 *Lz'<=DLoW  
L%$-?O|  
Units are Millimeters. \`~YW<D  
All changes are computed using linear differences. L$O\fhO?  
E@k'uyIu  
Paraxial Focus compensation only. Q.Nw#r+m  
1-^D2B[-  
WARNING: Solves should be removed prior to tolerancing. /77cjesZ9  
D<FQVdP  
Mnemonics: EmO[-W|2  
TFRN: Tolerance on curvature in fringes.
]s5e
[iS  
TTHI: Tolerance on thickness. RjviHd#DXn  
TSDX: Tolerance on surface decentering in x. '"7b;%EN'  
TSDY: Tolerance on surface decentering in y. j~\FDcG*ed  
TSTX: Tolerance on surface tilt in x (degrees). N`I
XSE  
TSTY: Tolerance on surface tilt in y (degrees). ,_(=w.F   
TIRR: Tolerance on irregularity (fringes). ,8Q0AkG  
TIND: Tolerance on Nd index of refraction. /2T  W?a  
TEDX: Tolerance on element decentering in x. ".|8(Y  
TEDY: Tolerance on element decentering in y. 3 $%#n*  
TETX: Tolerance on element tilt in x (degrees). ~28{BY  
TETY: Tolerance on element tilt in y (degrees). 1WqCezI  
X4:84  
WARNING: RAY AIMING IS OFF. Very loose tolerances may not be computed accurately. B=>Xr!pM!  
DI;LhS*z  
WARNING: Boundary constraints on compensators will be ignored. p@Os  
zFFYl7]  
Criterion           : Geometric MTF average S&T at 30.0000 cycles per mm P]}:E+E<.I  
Mode                : Sensitivities -tWxBGSa@  
Sampling            : 2 lrHN6:x(Y4  
Nominal Criterion   : 0.54403234 AX+]Z$  
Test Wavelength     : 0.6328 BR@gJ(2  
}T}c%p  

`R (N3  
Fields: XY Symmetric Angle in degrees r`FTiPD.C  
#      X-Field      Y-Field       Weight    VDX    VDY    VCX    VCY g8Y)90 G  
1   0.000E+000   0.000E+000   1.000E+000  0.000  0.000  0.000  0.000 @~$=96^  
hA/Es?U]  
Sensitivity Analysis: |]q{qsy  
aW|=|K  
                 |----------------- Minimum ----------------| |----------------- Maximum ----------------| %<Qv?`B  
Type                      Value      Criterion        Change          Value      Criterion        Change T<nK/lp1t  
Fringe tolerance on surface 1 4$2HO`@uN  
TFRN   1            -1.00000000     0.54257256    -0.00145977     1.00000000     0.54548607     0.00145374 K(MZ!>{  
Change in Focus                :      -0.000000                            0.000000 `{w|2 [C3  
Fringe tolerance on surface 2 yP-$@Ry  
TFRN   2            -1.00000000     0.54177471    -0.00225762     1.00000000     0.54627463     0.00224230 (mi=I3A(  
Change in Focus                :       0.000000                            0.000000 i/8OC  
Fringe tolerance on surface 3 #>CWee;  
TFRN   3            -1.00000000     0.54779866     0.00376632     1.00000000     0.54022572    -0.00380662 ""V\hHdp  
Change in Focus                :      -0.000000                            0.000000 hP[/xe  
Thickness tolerance on surface 1 <|WXFjn  
TTHI   1   3        -0.20000000     0.54321462    -0.00081772     0.20000000     0.54484759     0.00081525 ^N ;TCn  
Change in Focus                :       0.000000                            0.000000 5A %TpJ  
Thickness tolerance on surface 2 =VWH8w.3  
TTHI   2   3        -0.20000000     0.54478712     0.00075478     0.20000000     0.54327558    -0.00075675 ;6]ag< Q  
Change in Focus                :       0.000000                           -0.000000 5K|`RzZ`B$  
Decenter X tolerance on surfaces 1 through 3 T9}dgf  
TEDX   1   3        -0.20000000     0.54401464   -1.7700E-005     0.20000000     0.54401464   -1.7700E-005 <[gN4x>'  
Change in Focus                :       0.000000                            0.000000 ,Wd+&|Q  
Decenter Y tolerance on surfaces 1 through 3 - sq=|  
TEDY   1   3        -0.20000000     0.54401464   -1.7700E-005     0.20000000     0.54401464   -1.7700E-005 b83m'`vRM  
Change in Focus                :       0.000000                            0.000000 +r"fv*g"  
Tilt X tolerance on surfaces 1 through 3 (degrees) FhEfW7]0,  
TETX   1   3        -0.20000000     0.54897548     0.00494314     0.20000000     0.54897548     0.00494314 #;P-*P  
Change in Focus                :       0.000000                            0.000000 !a%_A^t7  
Tilt Y tolerance on surfaces 1 through 3 (degrees) [m<8SOMG(  
TETY   1   3        -0.20000000     0.54897548     0.00494314     0.20000000     0.54897548     0.00494314 o|s|Wmx>u  
Change in Focus                :       0.000000                            0.000000 _>t6]?*  
Decenter X tolerance on surface 1 d<cQYI4V  
TSDX   1            -0.20000000     0.53999563    -0.00403671     0.20000000     0.53999563    -0.00403671 8X\":l:  
Change in Focus                :       0.000000                            0.000000 )5diX + k  
Decenter Y tolerance on surface 1 5S! !@P!,  
TSDY   1            -0.20000000     0.53999563    -0.00403671     0.20000000     0.53999563    -0.00403671 `Z@qWB<  
Change in Focus                :       0.000000                            0.000000 *u
>[  
Tilt X tolerance on surface (degrees) 1 y&F&Z3t  
TSTX   1            -0.20000000     0.42678383    -0.11724851     0.20000000     0.42678383    -0.11724851 7X/B9Hee  
Change in Focus                :       0.000000                            0.000000 ~MK%^5y?  
Tilt Y tolerance on surface (degrees) 1 :{#w-oC>6P  
TSTY   1            -0.20000000     0.42678383    -0.11724851     0.20000000     0.42678383    -0.11724851 ^7`gf  
Change in Focus                :       0.000000                            0.000000 SUoUXh^!w  
Decenter X tolerance on surface 2 NF*Z<$'%  
TSDX   2            -0.20000000     0.51705427    -0.02697807     0.20000000     0.51705427    -0.02697807 <)oW  
Change in Focus                :       0.000000                            0.000000 F{m?:A  
Decenter Y tolerance on surface 2 RDu{U(!  
TSDY   2            -0.20000000     0.51705427    -0.02697807     0.20000000     0.51705427    -0.02697807 A9y3B^\*  
Change in Focus                :       0.000000                            0.000000 D'_w *  
Tilt X tolerance on surface (degrees) 2 S1*xM  
TSTX   2            -0.20000000     0.35349910    -0.19053324     0.20000000     0.35349910    -0.19053324 Gl>*e|}  
Change in Focus                :       0.000000                            0.000000 Fau24-g  
Tilt Y tolerance on surface (degrees) 2 $?|$uMIafp  
TSTY   2            -0.20000000     0.35349910    -0.19053324     0.20000000     0.35349910    -0.19053324 JHsxaX;c  
Change in Focus                :       0.000000                            0.000000 K|wB0TiXP  
Decenter X tolerance on surface 3 {=T9_c  
TSDX   3            -0.20000000     0.53419039    -0.00984195     0.20000000     0.53419039    -0.00984195 U;Q?Rh-W  
Change in Focus                :       0.000000                            0.000000 ,D{D QJ(B  
Decenter Y tolerance on surface 3
AKUmh  
TSDY   3            -0.20000000     0.53419039    -0.00984195     0.20000000     0.53419039    -0.00984195 ks(BS k4  
Change in Focus                :       0.000000                            0.000000 ;v%f +  
Tilt X tolerance on surface (degrees) 3 |Y;[)s =q  
TSTX   3            -0.20000000     0.42861670    -0.11541563     0.20000000     0.42861670    -0.11541563 /qPhptV  
Change in Focus                :       0.000000                            0.000000 nW_cjYS%  
Tilt Y tolerance on surface (degrees) 3 zXv2plw(  
TSTY   3            -0.20000000     0.42861670    -0.11541563     0.20000000     0.42861670    -0.11541563 _G^Cc}X  
Change in Focus                :       0.000000                            0.000000 M_f.e!?  
Irregularity of surface 1 in fringes 1c*XmMB  
TIRR   1            -0.20000000     0.50973587    -0.03429647     0.20000000     0.57333868     0.02930634 yo!
Y%9  
Change in Focus                :       0.000000                            0.000000 C\gKJW^]y@  
Irregularity of surface 2 in fringes ')KuLVE}S  
TIRR   2            -0.20000000     0.53400904    -0.01002330     0.20000000     0.55360281     0.00957047 ?!$:I8T  
Change in Focus                :       0.000000                            0.000000 h=MEQ-3jg  
Irregularity of surface 3 in fringes RfzYoBN  
TIRR   3            -0.20000000     0.58078982     0.03675748     0.20000000     0.49904394    -0.04498840 <4%vl+qW  
Change in Focus                :       0.000000                            0.000000 Yp;?Zq9  
Index tolerance on surface 1 L}pj+xB  
TIND   1            -0.00100000     0.52606778    -0.01796456     0.00100000     0.56121811     0.01718578 _.^`DP>  
Change in Focus                :       0.000000                            0.000000 V5bB$tL}3  
Index tolerance on surface 2 F4=V*/7  
TIND   2            -0.00100000     0.55639086     0.01235852     0.00100000     0.53126361    -0.01276872 I@:"Qee  
Change in Focus                :       0.000000                           -0.000000 hf< [$B  
g0:{{w  
Worst offenders: ^D A<=C-[!  
Type                      Value      Criterion        Change :HkXsZ  
TSTY   2            -0.20000000     0.35349910    -0.19053324 L4or*C^3  
TSTY   2             0.20000000     0.35349910    -0.19053324 \U.js-  
TSTX   2            -0.20000000     0.35349910    -0.19053324 7(C:ty9  
TSTX   2             0.20000000     0.35349910    -0.19053324 V$3`y=8  
TSTY   1            -0.20000000     0.42678383    -0.11724851 nG0R1<  
TSTY   1             0.20000000     0.42678383    -0.11724851 u
Fn?U)  
TSTX   1            -0.20000000     0.42678383    -0.11724851 1;eWnb(  
TSTX   1             0.20000000     0.42678383    -0.11724851 'C) v?!19  
TSTY   3            -0.20000000     0.42861670    -0.11541563 CO`?M,x>  
TSTY   3             0.20000000     0.42861670    -0.11541563 QVo>Uit   
eD!mR3Ai@D  
Estimated Performance Changes based upon Root-Sum-Square method: z8cefD9F  
Nominal MTF                 :     0.54403234 B0D  
Estimated change            :    -0.36299231 BRXD
E7vw  
Estimated MTF               :     0.18104003 61](a;Di  
o2!wz8  
Compensator Statistics: <."KejXg-  
Change in back focus: __}ut+H^5p  
Minimum            :        -0.000000 -quJX;~  
Maximum            :         0.000000 *auT_*  
Mean               :        -0.000000 y%O^Zm1  
Standard Deviation :         0.000000 n0g8B  
"EwzuM8f  
Monte Carlo Analysis: 6B+?X5-6DH  
Number of trials: 20 Ko0?c.l  
l2ie\4dK@  
Initial Statistics: Normal Distribution
opTH6a  
wsB  
  Trial       Criterion        Change >R5A@0@d5  
      1     0.42804416    -0.11598818 3n~O&{  
Change in Focus                :      -0.400171 3^5h:OaT  
      2     0.54384387    -0.00018847 RK=Pm7L:`y  
Change in Focus                :       1.018470 ~RLWr.pK  
      3     0.44510003    -0.09893230 &4ndi=.#rg  
Change in Focus                :      -0.601922 uU%Z%O  
      4     0.18154684    -0.36248550 gegM&Xo  
Change in Focus                :       0.920681 '2 Y8  
      5     0.28665820    -0.25737414 0s79rJ  
Change in Focus                :       1.253875 (4?^X  
      6     0.21263372    -0.33139862 +\$c_9|C+  
Change in Focus                :      -0.903878 [w!
T  
      7     0.40051424    -0.14351809 g)=$zXWhP  
Change in Focus                :      -1.354815 41P0)o  
      8     0.48754161    -0.05649072 {{?MO{Mh*  
Change in Focus                :       0.215922 LcB+L](  
      9     0.40357468    -0.14045766 $0vWC#.A]  
Change in Focus                :       0.281783 :,fT^izew  
     10     0.26315315    -0.28087919 /GX
>L)  
Change in Focus                :      -1.048393 %a|Qw(4\  
     11     0.26120585    -0.28282649 w}#3 pU<<  
Change in Focus                :       1.017611 +~ Hb}0ry  
     12     0.24033815    -0.30369419 bDudETl  
Change in Focus                :      -0.109292 P j,H]  
     13     0.37164046    -0.17239188 ycSGv4 )  
Change in Focus                :      -0.692430 (EvYrm4  
     14     0.48597489    -0.05805744 'J3yJ{  
Change in Focus                :      -0.662040 _iCrQJ0"T  
     15     0.21462327    -0.32940907 P{9wJ<  
Change in Focus                :       1.611296 o.w/?  
     16     0.43378226    -0.11025008 >F:1a\c  
Change in Focus                :      -0.640081 (F 9P1Iq  
     17     0.39321881    -0.15081353 B9[vv;lzu  
Change in Focus                :       0.914906 q'a]D
J`  
     18     0.20692530    -0.33710703 o5 ~VT!'[  
Change in Focus                :       0.801607 UJQTArf  
     19     0.51374068    -0.03029165 4n@>gW  
Change in Focus                :       0.947293 bcjh3WP  
     20     0.38013374    -0.16389860 ']fyD3N  
Change in Focus                :       0.667010 Y0kcxpK/  
'3U,UD5EG  
Number of traceable Monte Carlo files generated: 20 X Db%-  
R-dv$z0  
Nominal     0.54403234 k{lo'  
Best        0.54384387    Trial     2 );AtFP0Y  
Worst       0.18154684    Trial     4 pfIK9>i  
Mean        0.35770970 _Dqi#0#40p  
Std Dev     0.11156454 \p(
0H6  
~Q Q1
ZP3  
VyNF)$'T  
Compensator Statistics: xu"-Uj1  
Change in back focus: G~.VW48{n  
Minimum            :        -1.354815 lH`c&LL-=!  
Maximum            :         1.611296 ROfV Y:,M  
Mean               :         0.161872 #K@!jh)y^  
Standard Deviation :         0.869664 "N_@q2zF  
T,a{mi.hNR  
90% >       0.20977951               J Q*~le*  
80% >       0.22748071               i( +Uvtgs  
50% >       0.38667627               7Dl^5q.|  
20% >       0.46553746               @oj_E0i3  
10% >       0.50064115                u81F^72U  
@ YWuW
F  
End of Run. QD^=;!  
y c<%f  
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 Q2]7|C  

图片:3.JPG

pp*MHM)x|q  
-:L7iOzgD  
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 R6>*n!*D@  
Bq
a_l|  
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                 )MM(HS  
80% >       0.22748071                 E
JaO"9 (  
50% >       0.38667627                 Rg~
[X5  
20% >       0.46553746                 :J5CmU$  
10% >       0.50064115 <@@@Pl!~  
Qcs0w(  
最后这个数值是MTF值呢，还是MTF的公差？ (jE[W:  
} /Iw]!lK2  
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？？？   1;MUemnx`  
,76nDXy`  
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  : zFqlTUD`t  
90% >       0.20977951                 rv\m0*\<  
80% >       0.22748071                 eI7FbOze  
50% >       0.38667627                 R"9^FQ13  
20% >       0.46553746                 $6evK~  
10% >       0.50064115 |ZAR!u&0  
....... AUm"^-@x#>  

' R!pc  
+y$%S4>0tp  
这些数值都是MTF值

Criterion           : Geometric MTF average S&T at 30.0000 cycles per mm   &Hb;; Ic(  
Mode                : Sensitivities B^;P:S<yG  
Sampling            : 2 b'!t\m  
Nominal Criterion   : 0.54403234 |,3>A@  
Test Wavelength     : 0.6328 h%9>js^~  
\{Qd  
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？ ))/NGa  
aG"j9A~ &  
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