[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 CXoiA"P  
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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 ;rL1[qwk  
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图片:2.jpg

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然后运行分析的结果如下： r]\[G6mE%  
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Analysis of Tolerances Q Rr9|p{  
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File : E:\光学设计资料\zemax练习\f500.ZMX S m=ln)G=  
Title:  }+/
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Date : TUE JUN 21 2011 Nes|4Z<  
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Units are Millimeters. 8lqmd1v  
All changes are computed using linear differences. 8b7I\J`  
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Paraxial Focus compensation only. 5X];?(VTsb  
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WARNING: Solves should be removed prior to tolerancing. 1qn/*9W}=  
5 8;OTDR!  
Mnemonics: X{!,j}  
TFRN: Tolerance on curvature in fringes. =m (u=|N3  
TTHI: Tolerance on thickness. rf+}J_  
TSDX: Tolerance on surface decentering in x. E,?IIRg&  
TSDY: Tolerance on surface decentering in y. 'NjeF&#6  
TSTX: Tolerance on surface tilt in x (degrees). 5GJkvZtFY  
TSTY: Tolerance on surface tilt in y (degrees). l> H'PP~  
TIRR: Tolerance on irregularity (fringes). ckP AH E@  
TIND: Tolerance on Nd index of refraction. SbL7e#!!  
TEDX: Tolerance on element decentering in x. %K\B)HR
 
TEDY: Tolerance on element decentering in y. oM@%2M_O(  
TETX: Tolerance on element tilt in x (degrees). X_Lt{mf  
TETY: Tolerance on element tilt in y (degrees). a|t{1]^w`  
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WARNING: RAY AIMING IS OFF. Very loose tolerances may not be computed accurately.
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WARNING: Boundary constraints on compensators will be ignored. }8"i~>>a  
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Criterion           : Geometric MTF average S&T at 30.0000 cycles per mm xp3^,x;\X  
Mode                : Sensitivities ]QHZ[C  
Sampling            : 2 TZ n2,N  
Nominal Criterion   : 0.54403234 ^e]O >CJ  
Test Wavelength     : 0.6328 MoiRAO  
Bmt8yR2  
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Fields: XY Symmetric Angle in degrees Z{#3-O<a+n  
#      X-Field      Y-Field       Weight    VDX    VDY    VCX    VCY k{X+Y6'ku  
1   0.000E+000   0.000E+000   1.000E+000  0.000  0.000  0.000  0.000 ^P [#
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#]Do_Z  
Sensitivity Analysis: *&_A4)  
D2o|.e<r  
                 |----------------- Minimum ----------------| |----------------- Maximum ----------------| {s6#h#U  
Type                      Value      Criterion        Change          Value      Criterion        Change u0?TMy.%  
Fringe tolerance on surface 1 r0&LjH&R  
TFRN   1            -1.00000000     0.54257256    -0.00145977     1.00000000     0.54548607     0.00145374 dn42'(p@G  
Change in Focus                :      -0.000000                            0.000000 Q-G8Fo%#,E  
Fringe tolerance on surface 2 2|RxowXZ"  
TFRN   2            -1.00000000     0.54177471    -0.00225762     1.00000000     0.54627463     0.00224230 Eoo[H2=^H  
Change in Focus                :       0.000000                            0.000000 ,_7m<(/f  
Fringe tolerance on surface 3 '_K`1&#U  
TFRN   3            -1.00000000     0.54779866     0.00376632     1.00000000     0.54022572    -0.00380662 _m a;b<I/<  
Change in Focus                :      -0.000000                            0.000000 g?j^d:  
Thickness tolerance on surface 1 w*@9:+  
TTHI   1   3        -0.20000000     0.54321462    -0.00081772     0.20000000     0.54484759     0.00081525 %M^Q{` :5  
Change in Focus                :       0.000000                            0.000000 ~% ]V,-4  
Thickness tolerance on surface 2 i6;rh-M?.  
TTHI   2   3        -0.20000000     0.54478712     0.00075478     0.20000000     0.54327558    -0.00075675 p!T
ac%D+k  
Change in Focus                :       0.000000                           -0.000000 ojj T  
Decenter X tolerance on surfaces 1 through 3 e+2lus,u6t  
TEDX   1   3        -0.20000000     0.54401464   -1.7700E-005     0.20000000     0.54401464   -1.7700E-005 :=q9ay  
Change in Focus                :       0.000000                            0.000000 hO
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Decenter Y tolerance on surfaces 1 through 3 =q"0GUei3  
TEDY   1   3        -0.20000000     0.54401464   -1.7700E-005     0.20000000     0.54401464   -1.7700E-005 T I ZkN6  
Change in Focus                :       0.000000                            0.000000 l9y%@7  
Tilt X tolerance on surfaces 1 through 3 (degrees) slr>6o%W`  
TETX   1   3        -0.20000000     0.54897548     0.00494314     0.20000000     0.54897548     0.00494314 FO]f 4@  
Change in Focus                :       0.000000                            0.000000 y^{4}^u-^  
Tilt Y tolerance on surfaces 1 through 3 (degrees) >: @\SU  
TETY   1   3        -0.20000000     0.54897548     0.00494314     0.20000000     0.54897548     0.00494314 !#olG}#[  
Change in Focus                :       0.000000                            0.000000 EjEXev<]  
Decenter X tolerance on surface 1 ^ 6t"A  
TSDX   1            -0.20000000     0.53999563    -0.00403671     0.20000000     0.53999563    -0.00403671 ~7\`qH  
Change in Focus                :       0.000000                            0.000000 lY|]  
Decenter Y tolerance on surface 1 &s\,+d0  
TSDY   1            -0.20000000     0.53999563    -0.00403671     0.20000000     0.53999563    -0.00403671 t[b(erO'  
Change in Focus                :       0.000000                            0.000000 rX`fjS*C  
Tilt X tolerance on surface (degrees) 1 ^:O*Sx.CA  
TSTX   1            -0.20000000     0.42678383    -0.11724851     0.20000000     0.42678383    -0.11724851 J04R,B  
Change in Focus                :       0.000000                            0.000000 geqx":gpx9  
Tilt Y tolerance on surface (degrees) 1 $'a]lR  
TSTY   1            -0.20000000     0.42678383    -0.11724851     0.20000000     0.42678383    -0.11724851 `"iPJw14  
Change in Focus                :       0.000000                            0.000000 j_zy"8Y{  
Decenter X tolerance on surface 2 QYBLU7  
TSDX   2            -0.20000000     0.51705427    -0.02697807     0.20000000     0.51705427    -0.02697807 7d_"4;K)  
Change in Focus                :       0.000000                            0.000000 = j l(Q  
Decenter Y tolerance on surface 2 ')fIa2dO/  
TSDY   2            -0.20000000     0.51705427    -0.02697807     0.20000000     0.51705427    -0.02697807 HE2t0sAYX  
Change in Focus                :       0.000000                            0.000000 Z\)P|#L$  
Tilt X tolerance on surface (degrees) 2 ]HG>Og  
TSTX   2            -0.20000000     0.35349910    -0.19053324     0.20000000     0.35349910    -0.19053324 ~~ty9;KYL  
Change in Focus                :       0.000000                            0.000000 c8cGIAOY)  
Tilt Y tolerance on surface (degrees) 2 |ew:}e: k<  
TSTY   2            -0.20000000     0.35349910    -0.19053324     0.20000000     0.35349910    -0.19053324 L#_QrR6Sny  
Change in Focus                :       0.000000                            0.000000 "MOmJYH  
Decenter X tolerance on surface 3 N,cj[6;T%  
TSDX   3            -0.20000000     0.53419039    -0.00984195     0.20000000     0.53419039    -0.00984195 MF::At[4  
Change in Focus                :       0.000000                            0.000000 1<M~
#  
Decenter Y tolerance on surface 3 ;/^O7KM-  
TSDY   3            -0.20000000     0.53419039    -0.00984195     0.20000000     0.53419039    -0.00984195 +
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Change in Focus                :       0.000000                            0.000000 f5nAD  
Tilt X tolerance on surface (degrees) 3 qMBEJ<o  
TSTX   3            -0.20000000     0.42861670    -0.11541563     0.20000000     0.42861670    -0.11541563 6<n+p'+n  
Change in Focus                :       0.000000                            0.000000 i}5+\t[Q  
Tilt Y tolerance on surface (degrees) 3 .Ag)/Xm(?  
TSTY   3            -0.20000000     0.42861670    -0.11541563     0.20000000     0.42861670    -0.11541563 Yd~Tzh  
Change in Focus                :       0.000000                            0.000000 8O*O5  
Irregularity of surface 1 in fringes \FyHIs  
TIRR   1            -0.20000000     0.50973587    -0.03429647     0.20000000     0.57333868     0.02930634 J8`vk#5  
Change in Focus                :       0.000000                            0.000000 gLg\W3TOi  
Irregularity of surface 2 in fringes 00A2[gO9  
TIRR   2            -0.20000000     0.53400904    -0.01002330     0.20000000     0.55360281     0.00957047 V4%7
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Change in Focus                :       0.000000                            0.000000 %vrUk;<35  
Irregularity of surface 3 in fringes 16N`xw+{  
TIRR   3            -0.20000000     0.58078982     0.03675748     0.20000000     0.49904394    -0.04498840 OgyHX>}bH  
Change in Focus                :       0.000000                            0.000000 !AL?bW  
Index tolerance on surface 1 `+WQ^dP@  
TIND   1            -0.00100000     0.52606778    -0.01796456     0.00100000     0.56121811     0.01718578 Jz_`dLL^w  
Change in Focus                :       0.000000                            0.000000 tpKQ$)ed  
Index tolerance on surface 2 ?eR^\-e  
TIND   2            -0.00100000     0.55639086     0.01235852     0.00100000     0.53126361    -0.01276872 @,q<][q  
Change in Focus                :       0.000000                           -0.000000 C5#$NV99p  
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Worst offenders: \,b_8^  
Type                      Value      Criterion        Change Uw>g^[V;  
TSTY   2            -0.20000000     0.35349910    -0.19053324 qIgb;=V  
TSTY   2             0.20000000     0.35349910    -0.19053324
7:S)J~s*O  
TSTX   2            -0.20000000     0.35349910    -0.19053324 |F>'7JJJ  
TSTX   2             0.20000000     0.35349910    -0.19053324 T(eNK c2  
TSTY   1            -0.20000000     0.42678383    -0.11724851 l8!n!sC[
,  
TSTY   1             0.20000000     0.42678383    -0.11724851 W#<ZaGsq  
TSTX   1            -0.20000000     0.42678383    -0.11724851 J,wpY$93  
TSTX   1             0.20000000     0.42678383    -0.11724851 If.h
A}  
TSTY   3            -0.20000000     0.42861670    -0.11541563 ]3yaIlpD1  
TSTY   3             0.20000000     0.42861670    -0.11541563 [Q20c<,  
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Estimated Performance Changes based upon Root-Sum-Square method: pS)/yMlVj  
Nominal MTF                 :     0.54403234 ?|we.{  
Estimated change            :    -0.36299231 fYZ)5xnj  
Estimated MTF               :     0.18104003 & Pzr)W(  
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Compensator Statistics: ;jpsH?3g
 
Change in back focus:  jQ?6I1o  
Minimum            :        -0.000000 nSV OS6  
Maximum            :         0.000000 [,p[%Dza  
Mean               :        -0.000000 vC!}%sxVw_  
Standard Deviation :         0.000000 ~G`(=\_0  
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Monte Carlo Analysis: 5?4jD]Z  
Number of trials: 20 Z&0*\.6S~  
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Initial Statistics: Normal Distribution  |<1  
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  Trial       Criterion        Change c27A)`   
      1     0.42804416    -0.11598818 q:ZF6o`Z83  
Change in Focus                :      -0.400171 o%=OBTh_  
      2     0.54384387    -0.00018847 wloQk(T<W  
Change in Focus                :       1.018470 &p#.m"Oon  
      3     0.44510003    -0.09893230 YXhxzH hPd  
Change in Focus                :      -0.601922 Q+'QJ7fw'|  
      4     0.18154684    -0.36248550 *J] }bX  
Change in Focus                :       0.920681 q~:k[@`.  
      5     0.28665820    -0.25737414 (y!<^Q  
Change in Focus                :       1.253875 ^iaG>rvA  
      6     0.21263372    -0.33139862 8!{F6DG  
Change in Focus                :      -0.903878 Kr'5iFK7  
      7     0.40051424    -0.14351809 o72G oUfs  
Change in Focus                :      -1.354815 =h9&`iwiu  
      8     0.48754161    -0.05649072 ht%:e?@i  
Change in Focus                :       0.215922 n$}Cj}eju  
      9     0.40357468    -0.14045766 juQQ  
Change in Focus                :       0.281783 p$ %D  
     10     0.26315315    -0.28087919 8(c,b  
Change in Focus                :      -1.048393 X8(, ,>_  
     11     0.26120585    -0.28282649 w{;esU  
Change in Focus                :       1.017611 !4B($]t  
     12     0.24033815    -0.30369419 t1)Qa(#]  
Change in Focus                :      -0.109292 *^q%b/f  
     13     0.37164046    -0.17239188 PYp<eo\  
Change in Focus                :      -0.692430 4=E9$.3a  
     14     0.48597489    -0.05805744 (\<#fkeH  
Change in Focus                :      -0.662040 0R%R2p'wG  
     15     0.21462327    -0.32940907  Lx:O Dd  
Change in Focus                :       1.611296 WS?"OTH.^\  
     16     0.43378226    -0.11025008 yQxzFy  
Change in Focus                :      -0.640081 Gn_rf"  
     17     0.39321881    -0.15081353 ,KHebv!  
Change in Focus                :       0.914906 b-rgiR$cg  
     18     0.20692530    -0.33710703 ?|t9@r  
Change in Focus                :       0.801607 t Tky  
     19     0.51374068    -0.03029165 ({}JvSn1  
Change in Focus                :       0.947293 pO.+hy  
     20     0.38013374    -0.16389860 fYuz39#*  
Change in Focus                :       0.667010 #PpmR_IX  
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Number of traceable Monte Carlo files generated: 20 prx)Cfv  
w{1DwCLKq  
Nominal     0.54403234 b]Xc5Dp{  
Best        0.54384387    Trial     2 3~7X2}qU  
Worst       0.18154684    Trial     4 t
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Mean        0.35770970 @3hA\3ot^  
Std Dev     0.11156454 ' ?3e1  
IOx9".  
&cEQ6('H  
Compensator Statistics: PO,mg?JG(  
Change in back focus: WML%yO\.;  
Minimum            :        -1.354815 %\5d?;  
Maximum            :         1.611296 O.%' 47A  
Mean               :         0.161872 Jf-4Q!  
Standard Deviation :         0.869664 6 ZutU ~HS  
al9L+ruR  
90% >       0.20977951               $s*\yam?|  
80% >       0.22748071               %4/>7 aB]Y  
50% >       0.38667627               E{m\LUd^ :  
20% >       0.46553746               U=4tJb
 
10% >       0.50064115               
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End of Run. t<Iy`r71  
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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 HD1+0<  

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 2nL[P#r  
dVh*  a  
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                 f,Z*o  
80% >       0.22748071                 `Bw>0%.  
50% >       0.38667627                 ;L<D-=  
20% >       0.46553746                 )=KD  
10% >       0.50064115 *] H8X=[x  
I ,j,Hz0  
最后这个数值是MTF值呢，还是MTF的公差？ ?
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KaEL*  
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？？？   v}vwk8  
U3R;'80 f  
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  : {V7W!0;!  
90% >       0.20977951                 l_2B  
80% >       0.22748071                 rGn6S&-  
50% >       0.38667627                 D\4pLm"!v  
20% >       0.46553746                 ]jB`"to*}  
10% >       0.50064115 ]B2%\}c  
....... 2FE13{+f  

Jyz*W!kI  
j*6>{_[  
这些数值都是MTF值

Criterion           : Geometric MTF average S&T at 30.0000 cycles per mm   _kZ&t_]  
Mode                : Sensitivities .gJv})Vi  
Sampling            : 2  r .`&z  
Nominal Criterion   : 0.54403234 U>-GM>  
Test Wavelength     : 0.6328 N
?{.}-Q  
e#<A\?  
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？
b(Nxk2uv  
}I"k=>Ycns  
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