[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 PCES&|*rf  
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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 *Vc}W  
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图片:2.jpg

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然后运行分析的结果如下： u_uC78`p  
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Analysis of Tolerances ;[|x5o/<  
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File : E:\光学设计资料\zemax练习\f500.ZMX !is8`8F8  
Title: u%T.XgY=j  
Date : TUE JUN 21 2011 _Q7)FK  
RpreW7B_Q*  
Units are Millimeters. a E#s#Kv   
All changes are computed using linear differences. R%ddB D\?  
=\q3;5[  
Paraxial Focus compensation only. 'r-a:8:t^  
FY VcL*  
WARNING: Solves should be removed prior to tolerancing. uW[<?sFG  
co;2s-X  
Mnemonics: m7eO T  
TFRN: Tolerance on curvature in fringes. #)\KV7f!;  
TTHI: Tolerance on thickness. "c}bqoN  
TSDX: Tolerance on surface decentering in x. f>RPh bq|  
TSDY: Tolerance on surface decentering in y. DF-og*V  
TSTX: Tolerance on surface tilt in x (degrees). UH)A n:9  
TSTY: Tolerance on surface tilt in y (degrees). & MAIm56~  
TIRR: Tolerance on irregularity (fringes). s*S@}l  
TIND: Tolerance on Nd index of refraction. >si
<VCO  
TEDX: Tolerance on element decentering in x. $1w8GI\J  
TEDY: Tolerance on element decentering in y. KLoHjBq  
TETX: Tolerance on element tilt in x (degrees). j\W+wnAgk  
TETY: Tolerance on element tilt in y (degrees). &)wQ|{P~k  
fc M~4yP?  
WARNING: RAY AIMING IS OFF. Very loose tolerances may not be computed accurately. Sd{>(YWx~  
6#.R'O  
WARNING: Boundary constraints on compensators will be ignored. ,,i;6q_f  
SX;
FBO(p  
Criterion           : Geometric MTF average S&T at 30.0000 cycles per mm jdhhvo
Q  
Mode                : Sensitivities LDbo  
Sampling            : 2 te:@F]A  
Nominal Criterion   : 0.54403234 rMI:zFS  
Test Wavelength     : 0.6328 /at#[Pw~01  
D L$P  
Qz $1_vO  
Fields: XY Symmetric Angle in degrees DTJ~.  
#      X-Field      Y-Field       Weight    VDX    VDY    VCX    VCY 2Qn%p[#n  
1   0.000E+000   0.000E+000   1.000E+000  0.000  0.000  0.000  0.000 c|I{U[(U  
Ao0F?2|  
Sensitivity Analysis: z/;NoQ-  
"F0,S~tZZ  
                 |----------------- Minimum ----------------| |----------------- Maximum ----------------| b|4h2iuM  
Type                      Value      Criterion        Change          Value      Criterion        Change NjMo"1d  
Fringe tolerance on surface 1 P$qIB[Xi  
TFRN   1            -1.00000000     0.54257256    -0.00145977     1.00000000     0.54548607     0.00145374 N<?RN;M  
Change in Focus                :      -0.000000                            0.000000 PI }A')Nq.  
Fringe tolerance on surface 2 X3'z'
5  
TFRN   2            -1.00000000     0.54177471    -0.00225762     1.00000000     0.54627463     0.00224230 g6nB
u  
Change in Focus                :       0.000000                            0.000000 SA}]ZK P  
Fringe tolerance on surface 3 x; :[0(st}  
TFRN   3            -1.00000000     0.54779866     0.00376632     1.00000000     0.54022572    -0.00380662 =_TCtH  
Change in Focus                :      -0.000000                            0.000000 Rh:\/31~  
Thickness tolerance on surface 1 V-t!  
TTHI   1   3        -0.20000000     0.54321462    -0.00081772     0.20000000     0.54484759     0.00081525 7|H !(a'  
Change in Focus                :       0.000000                            0.000000 G`w7dn;&  
Thickness tolerance on surface 2 ]x~H"<V  
TTHI   2   3        -0.20000000     0.54478712     0.00075478     0.20000000     0.54327558    -0.00075675 V}3.K\7  
Change in Focus                :       0.000000                           -0.000000 <~f/T]E,  
Decenter X tolerance on surfaces 1 through 3 YsDn?pD@  
TEDX   1   3        -0.20000000     0.54401464   -1.7700E-005     0.20000000     0.54401464   -1.7700E-005 (3W
<yAM+  
Change in Focus                :       0.000000                            0.000000 .vwOp*3\  
Decenter Y tolerance on surfaces 1 through 3 #O
G_OI  
TEDY   1   3        -0.20000000     0.54401464   -1.7700E-005     0.20000000     0.54401464   -1.7700E-005 MTa.Ubs  
Change in Focus                :       0.000000                            0.000000 jH\@Oc;7  
Tilt X tolerance on surfaces 1 through 3 (degrees)  x@Q}sW92  
TETX   1   3        -0.20000000     0.54897548     0.00494314     0.20000000     0.54897548     0.00494314 y%iN9 -t  
Change in Focus                :       0.000000                            0.000000 c6Wy1d^  
Tilt Y tolerance on surfaces 1 through 3 (degrees) ij%\ld9kd  
TETY   1   3        -0.20000000     0.54897548     0.00494314     0.20000000     0.54897548     0.00494314 8r+R~{  
Change in Focus                :       0.000000                            0.000000 Z1*y$=D?3[  
Decenter X tolerance on surface 1 CkIICx  
TSDX   1            -0.20000000     0.53999563    -0.00403671     0.20000000     0.53999563    -0.00403671 :fo%)_Jc!  
Change in Focus                :       0.000000                            0.000000 ;Q-(tGd  
Decenter Y tolerance on surface 1 % &{>oEQ  
TSDY   1            -0.20000000     0.53999563    -0.00403671     0.20000000     0.53999563    -0.00403671 WCU[]A  
Change in Focus                :       0.000000                            0.000000 C S+6!F]  
Tilt X tolerance on surface (degrees) 1 evZ{~v&/  
TSTX   1            -0.20000000     0.42678383    -0.11724851     0.20000000     0.42678383    -0.11724851 !*N#}6Jd  
Change in Focus                :       0.000000                            0.000000 F@&q4whaVD  
Tilt Y tolerance on surface (degrees) 1 "o%N`Xlx  
TSTY   1            -0.20000000     0.42678383    -0.11724851     0.20000000     0.42678383    -0.11724851 _ 4pBJOJQ6  
Change in Focus                :       0.000000                            0.000000 X8F _Mb*  
Decenter X tolerance on surface 2 HuCH`|v-  
TSDX   2            -0.20000000     0.51705427    -0.02697807     0.20000000     0.51705427    -0.02697807 .-fJ\`^mi  
Change in Focus                :       0.000000                            0.000000 ;PGC9v%i  
Decenter Y tolerance on surface 2 ^uC1\!Q1  
TSDY   2            -0.20000000     0.51705427    -0.02697807     0.20000000     0.51705427    -0.02697807 Rm"lRkY4I[  
Change in Focus                :       0.000000                            0.000000 F< Qjoaz  
Tilt X tolerance on surface (degrees) 2 miEfxim  
TSTX   2            -0.20000000     0.35349910    -0.19053324     0.20000000     0.35349910    -0.19053324 _qM'm^z5  
Change in Focus                :       0.000000                            0.000000 MiAXbo#\  
Tilt Y tolerance on surface (degrees) 2 \2pJ ]  
TSTY   2            -0.20000000     0.35349910    -0.19053324     0.20000000     0.35349910    -0.19053324 &
A]*"lt|w  
Change in Focus                :       0.000000                            0.000000 l8n#sGA%  
Decenter X tolerance on surface 3 >\[sNCkf  
TSDX   3            -0.20000000     0.53419039    -0.00984195     0.20000000     0.53419039    -0.00984195 I3p ~pt2  
Change in Focus                :       0.000000                            0.000000 DBbmM*r  
Decenter Y tolerance on surface 3 =^O84Cp 6  
TSDY   3            -0.20000000     0.53419039    -0.00984195     0.20000000     0.53419039    -0.00984195 1KAA(W;nq  
Change in Focus                :       0.000000                            0.000000 E.t9F3
  
Tilt X tolerance on surface (degrees) 3 ngn%"xYX  
TSTX   3            -0.20000000     0.42861670    -0.11541563     0.20000000     0.42861670    -0.11541563 v`bX#\It  
Change in Focus                :       0.000000                            0.000000 pNCk~OM  
Tilt Y tolerance on surface (degrees) 3 rN8 ZQiJC  
TSTY   3            -0.20000000     0.42861670    -0.11541563     0.20000000     0.42861670    -0.11541563 !G Z2|~f9  
Change in Focus                :       0.000000                            0.000000 p~DlZk"  
Irregularity of surface 1 in fringes X Oc0j9Oa  
TIRR   1            -0.20000000     0.50973587    -0.03429647     0.20000000     0.57333868     0.02930634 ,m9Nd "6\  
Change in Focus                :       0.000000                            0.000000 tbl!{Qwx  
Irregularity of surface 2 in fringes TdG[b1xN  
TIRR   2            -0.20000000     0.53400904    -0.01002330     0.20000000     0.55360281     0.00957047 ycIT=AFYqd  
Change in Focus                :       0.000000                            0.000000 _|x%M}O},  
Irregularity of surface 3 in fringes _)ZAf%f?  
TIRR   3            -0.20000000     0.58078982     0.03675748     0.20000000     0.49904394    -0.04498840 0A/GWSmF  
Change in Focus                :       0.000000                            0.000000 j"yL6Q9P  
Index tolerance on surface 1 3@\vU~=P:  
TIND   1            -0.00100000     0.52606778    -0.01796456     0.00100000     0.56121811     0.01718578 7f~DD8R  
Change in Focus                :       0.000000                            0.000000 -|:7<$2#I  
Index tolerance on surface 2 C5*j0}  
TIND   2            -0.00100000     0.55639086     0.01235852     0.00100000     0.53126361    -0.01276872 UdT~h  
Change in Focus                :       0.000000                           -0.000000 hnmFhJ !g  
L5]*ZCDv  
Worst offenders: (<=qW_iW  
Type                      Value      Criterion        Change m{I_E G  
TSTY   2            -0.20000000     0.35349910    -0.19053324 [}+0NGgR  
TSTY   2             0.20000000     0.35349910    -0.19053324 LdDkd(k  
TSTX   2            -0.20000000     0.35349910    -0.19053324 'h([Y8p{  
TSTX   2             0.20000000     0.35349910    -0.19053324 p$0;~1vH  
TSTY   1            -0.20000000     0.42678383    -0.11724851 M%1-fd  
TSTY   1             0.20000000     0.42678383    -0.11724851 rX{QgyY&  
TSTX   1            -0.20000000     0.42678383    -0.11724851 T<mk98CdE  
TSTX   1             0.20000000     0.42678383    -0.11724851 3-FS} {,  
TSTY   3            -0.20000000     0.42861670    -0.11541563
b'St14_  
TSTY   3             0.20000000     0.42861670    -0.11541563 kS8srT /H  
GL.& g{$#+  
Estimated Performance Changes based upon Root-Sum-Square method: Bz }Kdyur  
Nominal MTF                 :     0.54403234 <~u.:x@ R  
Estimated change            :    -0.36299231 |Gzd|$%Oq  
Estimated MTF               :     0.18104003 P5%DvZB$w  
na?
jCq9C  
Compensator Statistics: Gg{@]9  
Change in back focus: (IAl$IP63s  
Minimum            :        -0.000000 7E%ehM6Y  
Maximum            :         0.000000 \#lh b  
Mean               :        -0.000000 mdoy1a  
Standard Deviation :         0.000000 6Bo~7gnc  
=5+M]y E<  
Monte Carlo Analysis: "mSDL:$  
Number of trials: 20 LGgEq-  
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Initial Statistics: Normal Distribution !3-mPG< ]  
9 %,_G.  
  Trial       Criterion        Change EN+WEMro  
      1     0.42804416    -0.11598818 _r+9S.z  
Change in Focus                :      -0.400171 i/,G=yA  
      2     0.54384387    -0.00018847 YL;ZZ2A  
Change in Focus                :       1.018470 }^pnwo9vV  
      3     0.44510003    -0.09893230 Z>7Oez>  
Change in Focus                :      -0.601922 \V7Hi\)  
      4     0.18154684    -0.36248550 fp:j~a>E  
Change in Focus                :       0.920681 [f:>tRdH  
      5     0.28665820    -0.25737414 uY5f mM9  
Change in Focus                :       1.253875 VVYQIR]!yk  
      6     0.21263372    -0.33139862 SrN0f0  
Change in Focus                :      -0.903878 13}=;4O  
      7     0.40051424    -0.14351809 @J!)o d  
Change in Focus                :      -1.354815 Fu^^Jex  
      8     0.48754161    -0.05649072 ) Z0  
Change in Focus                :       0.215922 +0^N#0)  
      9     0.40357468    -0.14045766 $lU~3I)  
Change in Focus                :       0.281783 ;TEZD70r  
     10     0.26315315    -0.28087919 "Y7RvL!U  
Change in Focus                :      -1.048393 +G7A.d`V}  
     11     0.26120585    -0.28282649 F<Z"W}I+6  
Change in Focus                :       1.017611 n'ZlIh  
     12     0.24033815    -0.30369419 /:z}WAW  
Change in Focus                :      -0.109292 Yz
hZ%:8  
     13     0.37164046    -0.17239188  &j2L-)  
Change in Focus                :      -0.692430 X`.4byqdK  
     14     0.48597489    -0.05805744 L_<&oq  
Change in Focus                :      -0.662040 ?$U
k[  
     15     0.21462327    -0.32940907 c42p>}P[  
Change in Focus                :       1.611296 Wa2V Z  
     16     0.43378226    -0.11025008 )fA9,yNJ3  
Change in Focus                :      -0.640081 R 7xV{o  
     17     0.39321881    -0.15081353 OJbY\U  
Change in Focus                :       0.914906 fdck/|`t  
     18     0.20692530    -0.33710703 vJtQ&,zG  
Change in Focus                :       0.801607 l!~8  
     19     0.51374068    -0.03029165 ]\+bx=  
Change in Focus                :       0.947293 Q'7o_[o/  
     20     0.38013374    -0.16389860 mu=u!by.E  
Change in Focus                :       0.667010 nC_
<pq^tr  
SXwgn >  
Number of traceable Monte Carlo files generated: 20 bpzB}nEp  
K%2,z3ps  
Nominal     0.54403234 1[} =,uaM  
Best        0.54384387    Trial     2 Kcsje_I-M  
Worst       0.18154684    Trial     4 (|(Y;%>-v  
Mean        0.35770970 YV.*8'*  
Std Dev     0.11156454 z]gxkol\  
{pd%
I  
VB
IPB  
Compensator Statistics: 0 m";=:(w  
Change in back focus: 0aQNdi)b  
Minimum            :        -1.354815 i._d^lR\t  
Maximum            :         1.611296 sN5x\9U  
Mean               :         0.161872 xZGR<+t  
Standard Deviation :         0.869664 y!blp>V6  
e4khReF;  
90% >       0.20977951               D7sw;{n
s  
80% >       0.22748071               o:f=dBmoX  
50% >       0.38667627               3|/ ;`KfQ  
20% >       0.46553746               A;SRm<,  
10% >       0.50064115                <!5N=-  
cK@O)Ko}  
End of Run. Z!wDh_  
&|n*&@fF  
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 O JvEq@  

图片:3.JPG

dQ/Xs.8  
sFC1PdSk4T  
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 BL]!j#''KE  
MCz+l0  
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                 zh*NRN  
80% >       0.22748071                 `\e@O#,^yI  
50% >       0.38667627                 2=["jP!B  
20% >       0.46553746                 Ev*HH+:b>  
10% >       0.50064115 T(J&v|FK  
"84.qgYaG  
最后这个数值是MTF值呢，还是MTF的公差？ _4[kg)#+  
Qnr' KbK  
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？？？   EBK\.[  
"=P@x|I  
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  : >Pbd#*  
90% >       0.20977951                 ^t9"!K  
80% >       0.22748071                 i aP+Vab  
50% >       0.38667627                 X
$PT-~!a  
20% >       0.46553746                 8.]dThaq  
10% >       0.50064115
9I^_
n+E  
....... %DzS~5$G  

i"sVk8+o!  
n#Z6d`  
这些数值都是MTF值

Criterion           : Geometric MTF average S&T at 30.0000 cycles per mm   %Ljc#AVg  
Mode                : Sensitivities bF?EuL  
Sampling            : 2 r`28fC  
Nominal Criterion   : 0.54403234 4lvo9R
 
Test Wavelength     : 0.6328 (VwS9:`
  
.eq-i>  
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？ 5 BcuLRId:  
3)42EM'9(  
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