[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 "~'b
 
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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 h<$MyN4]g  
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图片:2.jpg

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然后运行分析的结果如下： i-6Z"b{  
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Analysis of Tolerances MG.` r{5  
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File : E:\光学设计资料\zemax练习\f500.ZMX <u2}i<#  
Title: DY`kx2e!  
Date : TUE JUN 21 2011 wp&=$Aa)'  
soQ1X@"0  
Units are Millimeters. b9l;a+]d  
All changes are computed using linear differences. Y=Kc'x[,Zj  
P?k0zwOlBl  
Paraxial Focus compensation only. `^)jLuyu  
_fKou2$yz  
WARNING: Solves should be removed prior to tolerancing. V;v8=1t!  
[EKQR>s)  
Mnemonics: ]?(-[  
TFRN: Tolerance on curvature in fringes. s=;uc]9g  
TTHI: Tolerance on thickness. qw^uPs7Uw  
TSDX: Tolerance on surface decentering in x. [C'JH//q*t  
TSDY: Tolerance on surface decentering in y. _WRFsDZ'  
TSTX: Tolerance on surface tilt in x (degrees). 5rU[Tir  
TSTY: Tolerance on surface tilt in y (degrees). aJ>65RJ^=  
TIRR: Tolerance on irregularity (fringes). jEZMUqGY!  
TIND: Tolerance on Nd index of refraction. GaK-t*Q  
TEDX: Tolerance on element decentering in x. h%uZYsK  
TEDY: Tolerance on element decentering in y. `9BROZnq  
TETX: Tolerance on element tilt in x (degrees). ATK_DEAu  
TETY: Tolerance on element tilt in y (degrees). Kkm>e{0)AY  
BW$"`T@c6~  
WARNING: RAY AIMING IS OFF. Very loose tolerances may not be computed accurately. MB~=f[cUnd  
XzE
c2)0'v  
WARNING: Boundary constraints on compensators will be ignored. 0"pAN[=K@  
GJ_7h_4  
Criterion           : Geometric MTF average S&T at 30.0000 cycles per mm 0|{u{w@!`  
Mode                : Sensitivities c"B{/;A  
Sampling            : 2 73/P&hT  
Nominal Criterion   : 0.54403234 5?]hd*8  
Test Wavelength     : 0.6328 24z< gO  
75XJL;W #  
']2E {V  
Fields: XY Symmetric Angle in degrees Gz,i~XX  
#      X-Field      Y-Field       Weight    VDX    VDY    VCX    VCY xe^Gs]fm  
1   0.000E+000   0.000E+000   1.000E+000  0.000  0.000  0.000  0.000 7+\+DujE$  
~?K~L~f5  
Sensitivity Analysis: e,W%uH>X  
OCBgR4I  
                 |----------------- Minimum ----------------| |----------------- Maximum ----------------| n(;|q&3  
Type                      Value      Criterion        Change          Value      Criterion        Change SAy=WV  
Fringe tolerance on surface 1 EK6:~  
TFRN   1            -1.00000000     0.54257256    -0.00145977     1.00000000     0.54548607     0.00145374 0Ziw_S\d&s  
Change in Focus                :      -0.000000                            0.000000 K/IWH[  
Fringe tolerance on surface 2 HTX?,C_  
TFRN   2            -1.00000000     0.54177471    -0.00225762     1.00000000     0.54627463     0.00224230 ]~'5\58sP  
Change in Focus                :       0.000000                            0.000000 2AT5  
Fringe tolerance on surface 3 b4[bL2J$h1  
TFRN   3            -1.00000000     0.54779866     0.00376632     1.00000000     0.54022572    -0.00380662 LG9+y  
Change in Focus                :      -0.000000                            0.000000 A#EDkU,  
Thickness tolerance on surface 1 old(i:2  
TTHI   1   3        -0.20000000     0.54321462    -0.00081772     0.20000000     0.54484759     0.00081525 J  IUx  
Change in Focus                :       0.000000                            0.000000 `p2+&&]S  
Thickness tolerance on surface 2 *Q?tl\E  
TTHI   2   3        -0.20000000     0.54478712     0.00075478     0.20000000     0.54327558    -0.00075675 ;$.J3!  
Change in Focus                :       0.000000                           -0.000000 3G}x;Cp\D  
Decenter X tolerance on surfaces 1 through 3 u)}$~E>  
TEDX   1   3        -0.20000000     0.54401464   -1.7700E-005     0.20000000     0.54401464   -1.7700E-005 (k5We!4[1  
Change in Focus                :       0.000000                            0.000000 L^@'q6*}  
Decenter Y tolerance on surfaces 1 through 3 ~A'!2  
TEDY   1   3        -0.20000000     0.54401464   -1.7700E-005     0.20000000     0.54401464   -1.7700E-005 F\KjEl0  
Change in Focus                :       0.000000                            0.000000 4T|b Cs?e  
Tilt X tolerance on surfaces 1 through 3 (degrees) c;Pe/d  
TETX   1   3        -0.20000000     0.54897548     0.00494314     0.20000000     0.54897548     0.00494314 M2OIBH4!  
Change in Focus                :       0.000000                            0.000000 a_f
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Tilt Y tolerance on surfaces 1 through 3 (degrees) PgtJ3oq[}  
TETY   1   3        -0.20000000     0.54897548     0.00494314     0.20000000     0.54897548     0.00494314 ON=@O  
Change in Focus                :       0.000000                            0.000000 "{@A5A  
Decenter X tolerance on surface 1 kMi/>gpQ  
TSDX   1            -0.20000000     0.53999563    -0.00403671     0.20000000     0.53999563    -0.00403671 K1 EynU I  
Change in Focus                :       0.000000                            0.000000 9g'LkP  
Decenter Y tolerance on surface 1 g{OwuAC_  
TSDY   1            -0.20000000     0.53999563    -0.00403671     0.20000000     0.53999563    -0.00403671 l;R%= P?'F  
Change in Focus                :       0.000000                            0.000000 <D<4BnZ(  
Tilt X tolerance on surface (degrees) 1 I*{4rDt  
TSTX   1            -0.20000000     0.42678383    -0.11724851     0.20000000     0.42678383    -0.11724851 CZud& <  
Change in Focus                :       0.000000                            0.000000 \^L`7cBL  
Tilt Y tolerance on surface (degrees) 1 8m2Tk\;:  
TSTY   1            -0.20000000     0.42678383    -0.11724851     0.20000000     0.42678383    -0.11724851 ,?8qpEG~#+  
Change in Focus                :       0.000000                            0.000000 >s>1[W@*  
Decenter X tolerance on surface 2 b=yx7v"r  
TSDX   2            -0.20000000     0.51705427    -0.02697807     0.20000000     0.51705427    -0.02697807 8!O5quEc  
Change in Focus                :       0.000000                            0.000000 8@i7pBl@  
Decenter Y tolerance on surface 2 ,k )w6)  
TSDY   2            -0.20000000     0.51705427    -0.02697807     0.20000000     0.51705427    -0.02697807 iU$] {c2;A  
Change in Focus                :       0.000000                            0.000000 re/@D@%  
Tilt X tolerance on surface (degrees) 2 :ubV};  
TSTX   2            -0.20000000     0.35349910    -0.19053324     0.20000000     0.35349910    -0.19053324 S?1AFI9{   
Change in Focus                :       0.000000                            0.000000 k1w_[w[  
Tilt Y tolerance on surface (degrees) 2 #hfXZVD  
TSTY   2            -0.20000000     0.35349910    -0.19053324     0.20000000     0.35349910    -0.19053324 *X'Y$x>f  
Change in Focus                :       0.000000                            0.000000 F U_jGwD  
Decenter X tolerance on surface 3 }zkHJxZgE  
TSDX   3            -0.20000000     0.53419039    -0.00984195     0.20000000     0.53419039    -0.00984195 Tl(^  
Change in Focus                :       0.000000                            0.000000 }\tdcTMgS  
Decenter Y tolerance on surface 3 QdT}wkX  
TSDY   3            -0.20000000     0.53419039    -0.00984195     0.20000000     0.53419039    -0.00984195 =mS\i663  
Change in Focus                :       0.000000                            0.000000 SQBa;hvgM  
Tilt X tolerance on surface (degrees) 3 0 HGM4[)=  
TSTX   3            -0.20000000     0.42861670    -0.11541563     0.20000000     0.42861670    -0.11541563 hn5h\M?  
Change in Focus                :       0.000000                            0.000000 RQ vft  
Tilt Y tolerance on surface (degrees) 3 2`7==?  
TSTY   3            -0.20000000     0.42861670    -0.11541563     0.20000000     0.42861670    -0.11541563 5]KW^sL  
Change in Focus                :       0.000000                            0.000000 z:8eEq3w  
Irregularity of surface 1 in fringes H$=e -L`@  
TIRR   1            -0.20000000     0.50973587    -0.03429647     0.20000000     0.57333868     0.02930634 )Xk0VDNp$/  
Change in Focus                :       0.000000                            0.000000 .`HYA*8_  
Irregularity of surface 2 in fringes .{ocV#{
s  
TIRR   2            -0.20000000     0.53400904    -0.01002330     0.20000000     0.55360281     0.00957047 R)_%i<nq\  
Change in Focus                :       0.000000                            0.000000 ~zHjMo2  
Irregularity of surface 3 in fringes F_w Z"e6  
TIRR   3            -0.20000000     0.58078982     0.03675748     0.20000000     0.49904394    -0.04498840 )WRLBFi
3  
Change in Focus                :       0.000000                            0.000000 R<\F:9  
Index tolerance on surface 1 C7rNV0.Fq  
TIND   1            -0.00100000     0.52606778    -0.01796456     0.00100000     0.56121811     0.01718578 q*U*Fu+  
Change in Focus                :       0.000000                            0.000000 ~HTmO;HNf"  
Index tolerance on surface 2 'n{Nvt.c  
TIND   2            -0.00100000     0.55639086     0.01235852     0.00100000     0.53126361    -0.01276872 `|6'9  
Change in Focus                :       0.000000                           -0.000000 :o|\"3  
1C<uz29  
Worst offenders: AqWUwK9T  
Type                      Value      Criterion        Change -}nxJH)  
TSTY   2            -0.20000000     0.35349910    -0.19053324 >6NRi/[  
TSTY   2             0.20000000     0.35349910    -0.19053324 }#L^!\V}  
TSTX   2            -0.20000000     0.35349910    -0.19053324 ,F79xx9ufg  
TSTX   2             0.20000000     0.35349910    -0.19053324 61SlVec*o8  
TSTY   1            -0.20000000     0.42678383    -0.11724851 Z>QF#."m  
TSTY   1             0.20000000     0.42678383    -0.11724851 2/vMoVT,  
TSTX   1            -0.20000000     0.42678383    -0.11724851 
f[@77m*  
TSTX   1             0.20000000     0.42678383    -0.11724851 x.7]/)  
TSTY   3            -0.20000000     0.42861670    -0.11541563 _wTOmz%|R  
TSTY   3             0.20000000     0.42861670    -0.11541563 v=0(~<7B  
6N!Q:x^4(T  
Estimated Performance Changes based upon Root-Sum-Square method: \]</w5 Pi,  
Nominal MTF                 :     0.54403234 C`$n[kCJ  
Estimated change            :    -0.36299231 kh {p%<r{  
Estimated MTF               :     0.18104003 $w)!3c4  
Wr<j!>J6Ki  
Compensator Statistics: iIMd!Q.)@  
Change in back focus: n,jKmA  
Minimum            :        -0.000000 p2ogn}`  
Maximum            :         0.000000 T ?$:'XJ  
Mean               :        -0.000000 s%qF/70'  
Standard Deviation :         0.000000 !Y$h"<M  
W}m)cn3@  
Monte Carlo Analysis: @OV|]u  
Number of trials: 20 k_sg ?(-!o  
5*j?E  
Initial Statistics: Normal Distribution `7[EKOJ3g  
,=UK}*e"  
  Trial       Criterion        Change rX4j*u2u  
      1     0.42804416    -0.11598818 U}6B*Xx'  
Change in Focus                :      -0.400171 
k,85Y$`'  
      2     0.54384387    -0.00018847 Fpm|_f7  
Change in Focus                :       1.018470 syWG'(>  
      3     0.44510003    -0.09893230 ",^Mxm{  
Change in Focus                :      -0.601922 Sx708`/Ep  
      4     0.18154684    -0.36248550 |uX,5Q#6  
Change in Focus                :       0.920681 W?qmp|YD  
      5     0.28665820    -0.25737414 5 xppKt  
Change in Focus                :       1.253875 M^O2\G#B  
      6     0.21263372    -0.33139862 =8t]\Y?  
Change in Focus                :      -0.903878 :# .<[  
      7     0.40051424    -0.14351809 [Yo,*,y31  
Change in Focus                :      -1.354815 9Xj7~,  
      8     0.48754161    -0.05649072 RZHd9v$  
Change in Focus                :       0.215922 N9jH\0nG  
      9     0.40357468    -0.14045766 T;L>;E>B  
Change in Focus                :       0.281783 x,rlrxI  
     10     0.26315315    -0.28087919 '_GrD>P)-  
Change in Focus                :      -1.048393 wj,:"ESb4  
     11     0.26120585    -0.28282649 >d,jKlh^.%  
Change in Focus                :       1.017611 T+*%?2>q"  
     12     0.24033815    -0.30369419 v:!Z=I}>  
Change in Focus                :      -0.109292 byLft1  
     13     0.37164046    -0.17239188 { &"CH]r  
Change in Focus                :      -0.692430 GO__$%~  
     14     0.48597489    -0.05805744 B.dH(um  
Change in Focus                :      -0.662040 N.\- 8?>  
     15     0.21462327    -0.32940907 {_`^R>"\&w  
Change in Focus                :       1.611296 4?ICy/,U-  
     16     0.43378226    -0.11025008 bL'aB{s  
Change in Focus                :      -0.640081 S'4(0j  
     17     0.39321881    -0.15081353 Jz7!4mu  
Change in Focus                :       0.914906 )\eI;8  
     18     0.20692530    -0.33710703 t/cY=Wp  
Change in Focus                :       0.801607 1`(tf6op  
     19     0.51374068    -0.03029165 lwrCpD.  
Change in Focus                :       0.947293 =<{np  
     20     0.38013374    -0.16389860 ?$*SjZt  
Change in Focus                :       0.667010 j/fzzI0@  
6G #}Q/  
Number of traceable Monte Carlo files generated: 20 cl]Mi "3_  
kS_(wpA  
Nominal     0.54403234 =T(6#"  
Best        0.54384387    Trial     2 *VFf.aPwYi  
Worst       0.18154684    Trial     4 r[BVvX/,F  
Mean        0.35770970 x[$z({Yf  
Std Dev     0.11156454 vgsJeV`}I  
[P&7i57  
1DE1.1  
Compensator Statistics: ]L9s%]o  
Change in back focus: MCS8y+QK  
Minimum            :        -1.354815 KVn []@#  
Maximum            :         1.611296 #73F} tZ^  
Mean               :         0.161872 5Ow[~p"l<  
Standard Deviation :         0.869664 tnPv70m  
d/[; `ZD+  
90% >       0.20977951               :c8&N-`  
80% >       0.22748071               |y0(Q V  
50% >       0.38667627               |N%fMPKa  
20% >       0.46553746               ~yH?=:>U  
10% >       0.50064115                :-/M?
,Q"  
-(  
End of Run. 9aze>nxh.  
.NYbi@bk(<  
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 ldiD2 Q  

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 t m7^yn:  
SKkUU^\#R`  
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                 EfCx`3~EX  
80% >       0.22748071                 B{'( L|  
50% >       0.38667627                 Q9Kve3u-i  
20% >       0.46553746                 }]lr>"~y}  
10% >       0.50064115 {q`jDDM  
??M"6k  
最后这个数值是MTF值呢，还是MTF的公差？ ZWc]$H?  
qz0;p=$8Z  
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？？？   .J)I | '  
+n{#V;J  
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  : wQ^EYKD  
90% >       0.20977951                 gp>3I!bo[K  
80% >       0.22748071                 B* ?]H*K  
50% >       0.38667627                 ar__ Pf6r  
20% >       0.46553746                 )wC?T  
10% >       0.50064115 B:'J`M"N  
....... yXSFjcoB  

Y$Zx,  
mq@6Q\Z+  
这些数值都是MTF值

Criterion           : Geometric MTF average S&T at 30.0000 cycles per mm   zk$FkbX  
Mode                : Sensitivities ojcA<60 '  
Sampling            : 2 7m4ao
K  
Nominal Criterion   : 0.54403234 4!Fo$9  
Test Wavelength     : 0.6328 |iakz|])  
[xSF6  
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？ cz >V8  
2;k*@k-t  
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