[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 !q X7   
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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 ~LVa#  
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图片:2.jpg

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然后运行分析的结果如下： 0V^?~ex  
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Analysis of Tolerances l6&R g-  
by {~gu  
File : E:\光学设计资料\zemax练习\f500.ZMX 6V)#Yf  
Title: ((y+FJH  
Date : TUE JUN 21 2011 U+K_eEI0_I  
. &e,8  
Units are Millimeters. NM4 n  
All changes are computed using linear differences. dCHU* 7DS  
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Paraxial Focus compensation only. h41v}5!-  
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WARNING: Solves should be removed prior to tolerancing. *}?^)z7w  
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Mnemonics: R}0cO^V  
TFRN: Tolerance on curvature in fringes. =$m|M m[a  
TTHI: Tolerance on thickness. |$D^LY  
TSDX: Tolerance on surface decentering in x. D@2Tx  
TSDY: Tolerance on surface decentering in y. m,pDjf  
TSTX: Tolerance on surface tilt in x (degrees). FOZqN K  
TSTY: Tolerance on surface tilt in y (degrees). `:8
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TIRR: Tolerance on irregularity (fringes). { "/@,!9rJ  
TIND: Tolerance on Nd index of refraction. AIE)q]'Q  
TEDX: Tolerance on element decentering in x. A81kb  
TEDY: Tolerance on element decentering in y. X\h]N  
TETX: Tolerance on element tilt in x (degrees). ,xGlWH wrY  
TETY: Tolerance on element tilt in y (degrees). DzYno-]A]  

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WARNING: RAY AIMING IS OFF. Very loose tolerances may not be computed accurately. 9 Hm!B )Y  
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WARNING: Boundary constraints on compensators will be ignored. _uRgKoiy  
s?=J#WV1y  
Criterion           : Geometric MTF average S&T at 30.0000 cycles per mm XpM#0hm  
Mode                : Sensitivities ?J>^
X-z  
Sampling            : 2 Xdjxt?*  
Nominal Criterion   : 0.54403234 )q#b^( v  
Test Wavelength     : 0.6328  @]A4{  
I3SLR  
K$rH{dUM  
Fields: XY Symmetric Angle in degrees <uA|nYpp  
#      X-Field      Y-Field       Weight    VDX    VDY    VCX    VCY r:u5+A  
1   0.000E+000   0.000E+000   1.000E+000  0.000  0.000  0.000  0.000 rtY0?  
39u!j|VH  
Sensitivity Analysis: f$P pFSY4  
j88H3b
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                 |----------------- Minimum ----------------| |----------------- Maximum ----------------| TIS}'c'C  
Type                      Value      Criterion        Change          Value      Criterion        Change ;'nu9FU*O  
Fringe tolerance on surface 1 -0>@jfP^D  
TFRN   1            -1.00000000     0.54257256    -0.00145977     1.00000000     0.54548607     0.00145374 /9[nogP  
Change in Focus                :      -0.000000                            0.000000 ecr pv+  
Fringe tolerance on surface 2 [u~#F,_ow  
TFRN   2            -1.00000000     0.54177471    -0.00225762     1.00000000     0.54627463     0.00224230 B=9|g1e  
Change in Focus                :       0.000000                            0.000000 [/#;u*n  
Fringe tolerance on surface 3 w
KwireOs  
TFRN   3            -1.00000000     0.54779866     0.00376632     1.00000000     0.54022572    -0.00380662 YncY_Hu  
Change in Focus                :      -0.000000                            0.000000 /VJ[1o^  
Thickness tolerance on surface 1 6tP^_9njy  
TTHI   1   3        -0.20000000     0.54321462    -0.00081772     0.20000000     0.54484759     0.00081525 c/pT2/y  
Change in Focus                :       0.000000                            0.000000 #A?U_32z/2  
Thickness tolerance on surface 2 +`\C_i-  
TTHI   2   3        -0.20000000     0.54478712     0.00075478     0.20000000     0.54327558    -0.00075675 ]` 3;8,  
Change in Focus                :       0.000000                           -0.000000 O"Ar3>  
Decenter X tolerance on surfaces 1 through 3 Pg5 1}{  
TEDX   1   3        -0.20000000     0.54401464   -1.7700E-005     0.20000000     0.54401464   -1.7700E-005 Y0U:i.)  
Change in Focus                :       0.000000                            0.000000 W<kJ%42^j  
Decenter Y tolerance on surfaces 1 through 3 KO:o GUR  
TEDY   1   3        -0.20000000     0.54401464   -1.7700E-005     0.20000000     0.54401464   -1.7700E-005 3q<\ \8Y*  
Change in Focus                :       0.000000                            0.000000 L7 qim.J  
Tilt X tolerance on surfaces 1 through 3 (degrees) _t3n<  
TETX   1   3        -0.20000000     0.54897548     0.00494314     0.20000000     0.54897548     0.00494314 >?I[dYzut  
Change in Focus                :       0.000000                            0.000000 =`g+3 O;<  
Tilt Y tolerance on surfaces 1 through 3 (degrees) y\Zx{A[  
TETY   1   3        -0.20000000     0.54897548     0.00494314     0.20000000     0.54897548     0.00494314 {ImZ><xe/  
Change in Focus                :       0.000000                            0.000000 DN!:Rm uc  
Decenter X tolerance on surface 1 I lvjS^j  
TSDX   1            -0.20000000     0.53999563    -0.00403671     0.20000000     0.53999563    -0.00403671

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Change in Focus                :       0.000000                            0.000000 J,k9?nkY /  
Decenter Y tolerance on surface 1 a&|aK+^8;  
TSDY   1            -0.20000000     0.53999563    -0.00403671     0.20000000     0.53999563    -0.00403671 8{@#N:SY  
Change in Focus                :       0.000000                            0.000000 p.&FK'&[0  
Tilt X tolerance on surface (degrees) 1 :rwF5
 
TSTX   1            -0.20000000     0.42678383    -0.11724851     0.20000000     0.42678383    -0.11724851 ->:G+<  
Change in Focus                :       0.000000                            0.000000 f5^[`b3H  
Tilt Y tolerance on surface (degrees) 1 YG<?|AS/  
TSTY   1            -0.20000000     0.42678383    -0.11724851     0.20000000     0.42678383    -0.11724851 S_aml  
Change in Focus                :       0.000000                            0.000000 'Aai.PE:  
Decenter X tolerance on surface 2 |no '^  
TSDX   2            -0.20000000     0.51705427    -0.02697807     0.20000000     0.51705427    -0.02697807 =p:D_b  
Change in Focus                :       0.000000                            0.000000 #\o VbVq  
Decenter Y tolerance on surface 2 1+v)#Wj  
TSDY   2            -0.20000000     0.51705427    -0.02697807     0.20000000     0.51705427    -0.02697807 b4i=eI8  
Change in Focus                :       0.000000                            0.000000 6 C;??Y>b  
Tilt X tolerance on surface (degrees) 2 vY:A7yGW  
TSTX   2            -0.20000000     0.35349910    -0.19053324     0.20000000     0.35349910    -0.19053324 $ ^m_M.1  
Change in Focus                :       0.000000                            0.000000 nO2-fW:9]  
Tilt Y tolerance on surface (degrees) 2 a";(C,:0  
TSTY   2            -0.20000000     0.35349910    -0.19053324     0.20000000     0.35349910    -0.19053324 (+(YO\ng6  
Change in Focus                :       0.000000                            0.000000 &p`RKD  
Decenter X tolerance on surface 3 }n oI2.-#  
TSDX   3            -0.20000000     0.53419039    -0.00984195     0.20000000     0.53419039    -0.00984195 cYq<.A(hVj  
Change in Focus                :       0.000000                            0.000000 ;)~loa1\  
Decenter Y tolerance on surface 3 %jim] ]<S[  
TSDY   3            -0.20000000     0.53419039    -0.00984195     0.20000000     0.53419039    -0.00984195 RT4ns+J1  
Change in Focus                :       0.000000                            0.000000 Jah~h44&  
Tilt X tolerance on surface (degrees) 3 *EvnN:  
TSTX   3            -0.20000000     0.42861670    -0.11541563     0.20000000     0.42861670    -0.11541563 5L%A5C&|  
Change in Focus                :       0.000000                            0.000000 Gr}Lp  
Tilt Y tolerance on surface (degrees) 3 7;+:J;xf66  
TSTY   3            -0.20000000     0.42861670    -0.11541563     0.20000000     0.42861670    -0.11541563 *dL!)+:d  
Change in Focus                :       0.000000                            0.000000 sJ{NbN~`I  
Irregularity of surface 1 in fringes -!k"*P  
TIRR   1            -0.20000000     0.50973587    -0.03429647     0.20000000     0.57333868     0.02930634 8$BZbj%?hx  
Change in Focus                :       0.000000                            0.000000 =4 36/O`K  
Irregularity of surface 2 in fringes p
{[Ol  
TIRR   2            -0.20000000     0.53400904    -0.01002330     0.20000000     0.55360281     0.00957047 e>=P'  
Change in Focus                :       0.000000                            0.000000 t[XxLG*  
Irregularity of surface 3 in fringes rB~x]
5TH  
TIRR   3            -0.20000000     0.58078982     0.03675748     0.20000000     0.49904394    -0.04498840 D}r,t_]Eb  
Change in Focus                :       0.000000                            0.000000 $RfM}!7?  
Index tolerance on surface 1 S1.w^Ccy  
TIND   1            -0.00100000     0.52606778    -0.01796456     0.00100000     0.56121811     0.01718578 ^?VYE26  
Change in Focus                :       0.000000                            0.000000 {Ug?k<h7|  
Index tolerance on surface 2 Kzfa4C  
TIND   2            -0.00100000     0.55639086     0.01235852     0.00100000     0.53126361    -0.01276872 %tT&/F  
Change in Focus                :       0.000000                           -0.000000 KW]/u  
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Worst offenders: D9*GS_K2t  
Type                      Value      Criterion        Change ]g2Y/\)a  
TSTY   2            -0.20000000     0.35349910    -0.19053324 uhz:G~x
!  
TSTY   2             0.20000000     0.35349910    -0.19053324 |X,T>{V?y  
TSTX   2            -0.20000000     0.35349910    -0.19053324 $WI=a-;_e  
TSTX   2             0.20000000     0.35349910    -0.19053324 PF+v[h;,  
TSTY   1            -0.20000000     0.42678383    -0.11724851 DDsU6RyN  
TSTY   1             0.20000000     0.42678383    -0.11724851 SxdH%agM  
TSTX   1            -0.20000000     0.42678383    -0.11724851 A
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TSTX   1             0.20000000     0.42678383    -0.11724851 > SU2Jw  
TSTY   3            -0.20000000     0.42861670    -0.11541563 gBA UrY%]  
TSTY   3             0.20000000     0.42861670    -0.11541563 ]cdKd)  
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Estimated Performance Changes based upon Root-Sum-Square method: +1zCb=;!{  
Nominal MTF                 :     0.54403234 Pwn"!pk  
Estimated change            :    -0.36299231 7@NAky(  
Estimated MTF               :     0.18104003 gNY}`'~hr  
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Compensator Statistics: !/^i\)j>](  
Change in back focus: 2>Bx/QF@<  
Minimum            :        -0.000000 4mq+{c0  
Maximum            :         0.000000 k>I[U}h  
Mean               :        -0.000000 &=oW=g2  
Standard Deviation :         0.000000 S-&[Tp+
N  
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Monte Carlo Analysis: ~3<Li}W  
Number of trials: 20 8.3888  
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Initial Statistics: Normal Distribution t84(kzcC  
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  Trial       Criterion        Change k7yQEU  
      1     0.42804416    -0.11598818 ;+t~$5  
Change in Focus                :      -0.400171 P$?3\`U;  
      2     0.54384387    -0.00018847 @5+ JXD  
Change in Focus                :       1.018470 !VUxy  
      3     0.44510003    -0.09893230 fmC)]O%q  
Change in Focus                :      -0.601922 mZDL=
p  
      4     0.18154684    -0.36248550 ;$gZ?&  
Change in Focus                :       0.920681 (F@.o1No%  
      5     0.28665820    -0.25737414 (;T$[ru`  
Change in Focus                :       1.253875 Y>Lg
pO.  
      6     0.21263372    -0.33139862 zY6{ OP!#  
Change in Focus                :      -0.903878 a"uO0LOb  
      7     0.40051424    -0.14351809 @|! 9~F  
Change in Focus                :      -1.354815 STmn%&  
      8     0.48754161    -0.05649072 {Bk9]:'$5  
Change in Focus                :       0.215922 '~Uo+<v$w  
      9     0.40357468    -0.14045766 a=}JW]  
Change in Focus                :       0.281783 teh$W<C  
     10     0.26315315    -0.28087919 m2{3j[  
Change in Focus                :      -1.048393 q|,cMPS3  
     11     0.26120585    -0.28282649 gU1E6V-Jm  
Change in Focus                :       1.017611 o%_MTCANy  
     12     0.24033815    -0.30369419 M il ![A1  
Change in Focus                :      -0.109292 <Hw)},_*  
     13     0.37164046    -0.17239188 q y"VrR  
Change in Focus                :      -0.692430 a'=C/ s+  
     14     0.48597489    -0.05805744 <20rxOEnf  
Change in Focus                :      -0.662040 iy_'D
  
     15     0.21462327    -0.32940907 +rse,b&U(  
Change in Focus                :       1.611296 V9q
Za  
     16     0.43378226    -0.11025008 dXR70/  
Change in Focus                :      -0.640081 a-w=LpVM
 
     17     0.39321881    -0.15081353 kNqSBzg  
Change in Focus                :       0.914906 oo sbf#V  
     18     0.20692530    -0.33710703 >Hb>wlYR  
Change in Focus                :       0.801607 l1BbL5#1Q>  
     19     0.51374068    -0.03029165 %HOMX{~}#  
Change in Focus                :       0.947293 mv9k_7<  
     20     0.38013374    -0.16389860 wT/TQEgz  
Change in Focus                :       0.667010 z<2!|  
8l,`~jvU!*  
Number of traceable Monte Carlo files generated: 20 (`h$+p^-y  
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Nominal     0.54403234 H{Tt>k  
Best        0.54384387    Trial     2 3Jt_=!qlo  
Worst       0.18154684    Trial     4 V?"X0>]0  
Mean        0.35770970 g}HB|$P7  
Std Dev     0.11156454 oL?(; `"&  
e45gjjts  
9+<%74|,  
Compensator Statistics: BZAeg">3  
Change in back focus: nd)Z0%xo  
Minimum            :        -1.354815 A$*#n8,  
Maximum            :         1.611296 <WXO].^  
Mean               :         0.161872 h_Ky2IB$  
Standard Deviation :         0.869664 X"QIH|qx-  
~P&Brn"=Rs  
90% >       0.20977951               05eth  
80% >       0.22748071               a(}dF?M=  
50% >       0.38667627               VxD_:USIF  
20% >       0.46553746               C'8v\C9Ag  
10% >       0.50064115                @j +8M  
yh9fHN)F  
End of Run. o+
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W_k;jy_{9  
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 52+;j[ ]/O  

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 +Kc1a;  
4dy2m!  
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                 eF8!}|*N  
80% >       0.22748071                 xEK+NKTeV  
50% >       0.38667627                 0,)Ao8  
20% >       0.46553746                 y/'^r?  
10% >       0.50064115 ~50b$];y  
At5:X*vD  
最后这个数值是MTF值呢，还是MTF的公差？ o`^GUY}  
q/w U7P\%  
也就是说，这到底是有90%的产品MTF大于0.20977951还是90%的产品的MTF变化量大于0.20977951？？？   ~$g$31/  
]7WBoC8  
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  : puS'9Lpp  
90% >       0.20977951                 GCrh4rxgg  
80% >       0.22748071                 >HnD'y*  
50% >       0.38667627                 L@?Dmn'v  
20% >       0.46553746                 64}Oa+*s  
10% >       0.50064115 q`09   
....... );$Uf!v4  

=mCUuY#  
KdFQlQaj  
这些数值都是MTF值

Criterion           : Geometric MTF average S&T at 30.0000 cycles per mm   +8
[h&  
Mode                : Sensitivities #e&j]Q$Eh  
Sampling            : 2 TEB%y9  
Nominal Criterion   : 0.54403234 AEK* w4  
Test Wavelength     : 0.6328 H's67E/>*  


=KNg "|  
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？ 6luCi$bL  
)rhKWg  
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