[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 ?-m
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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 $I40 hk  
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图片:2.jpg

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然后运行分析的结果如下： >*#clf;@p  
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Analysis of Tolerances bvY'=   
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File : E:\光学设计资料\zemax练习\f500.ZMX \*{tAF  
Title: t?JY@hT*  
Date : TUE JUN 21 2011 KLqn`m`O;  
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Units are Millimeters. 'BY{]{SL  
All changes are computed using linear differences. *~b3FLzq  
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Paraxial Focus compensation only.
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WARNING: Solves should be removed prior to tolerancing. n{oRmw-
 
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Mnemonics: 'Oyx X  
TFRN: Tolerance on curvature in fringes. V_Ow
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TTHI: Tolerance on thickness. H]v"_!(\  
TSDX: Tolerance on surface decentering in x. #P:o  
TSDY: Tolerance on surface decentering in y. XEd|<+P1  
TSTX: Tolerance on surface tilt in x (degrees). # 3{g6[Y  
TSTY: Tolerance on surface tilt in y (degrees). nNe`?TS?f  
TIRR: Tolerance on irregularity (fringes). ^<L;"jl%  
TIND: Tolerance on Nd index of refraction. -~z]ut<Z  
TEDX: Tolerance on element decentering in x. .O9A[s<  
TEDY: Tolerance on element decentering in y. ;DWtCtD  
TETX: Tolerance on element tilt in x (degrees). BPAz.K Q  
TETY: Tolerance on element tilt in y (degrees). _y~H#r9:  
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WARNING: RAY AIMING IS OFF. Very loose tolerances may not be computed accurately. >?b<)Q*<  
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WARNING: Boundary constraints on compensators will be ignored. slSQ\;CDA  
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Criterion           : Geometric MTF average S&T at 30.0000 cycles per mm Al?LO;$Pa?  
Mode                : Sensitivities wFr}]<=Mi  
Sampling            : 2 zPwU'TbF  
Nominal Criterion   : 0.54403234 W`zY\]  
Test Wavelength     : 0.6328 "52nT  
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Fields: XY Symmetric Angle in degrees rx^vh%/ Q!  
#      X-Field      Y-Field       Weight    VDX    VDY    VCX    VCY IEb"tsel  
1   0.000E+000   0.000E+000   1.000E+000  0.000  0.000  0.000  0.000 }Ip"j]h  
**I9Nw!IH  
Sensitivity Analysis: {4\hxyw  
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                 |----------------- Minimum ----------------| |----------------- Maximum ----------------| TF %8pIg>Z  
Type                      Value      Criterion        Change          Value      Criterion        Change m#[tY>Q[b  
Fringe tolerance on surface 1 z?~W]PWiZ  
TFRN   1            -1.00000000     0.54257256    -0.00145977     1.00000000     0.54548607     0.00145374 s(yVE  
Change in Focus                :      -0.000000                            0.000000 !6:q#B*  
Fringe tolerance on surface 2 %\=oy=f  
TFRN   2            -1.00000000     0.54177471    -0.00225762     1.00000000     0.54627463     0.00224230 !*8x>,/>  
Change in Focus                :       0.000000                            0.000000 g=?KpI-pn0  
Fringe tolerance on surface 3 G-FTyIP>'  
TFRN   3            -1.00000000     0.54779866     0.00376632     1.00000000     0.54022572    -0.00380662 ~;/\l=Xl  
Change in Focus                :      -0.000000                            0.000000 .F'fBT`$  
Thickness tolerance on surface 1 %I]?xe6  
TTHI   1   3        -0.20000000     0.54321462    -0.00081772     0.20000000     0.54484759     0.00081525 f3h&K}x  
Change in Focus                :       0.000000                            0.000000 R#Z1+&='  
Thickness tolerance on surface 2 _#c^z;!  
TTHI   2   3        -0.20000000     0.54478712     0.00075478     0.20000000     0.54327558    -0.00075675 13s0uyYU<m  
Change in Focus                :       0.000000                           -0.000000 9g" 1WZ!  
Decenter X tolerance on surfaces 1 through 3 %9|=\# G  
TEDX   1   3        -0.20000000     0.54401464   -1.7700E-005     0.20000000     0.54401464   -1.7700E-005 {b@rQCre7  
Change in Focus                :       0.000000                            0.000000 C7=Q!UK`\  
Decenter Y tolerance on surfaces 1 through 3 jjgY4<n  
TEDY   1   3        -0.20000000     0.54401464   -1.7700E-005     0.20000000     0.54401464   -1.7700E-005 7#Qa/[? D  
Change in Focus                :       0.000000                            0.000000 1m-"v:fT5D  
Tilt X tolerance on surfaces 1 through 3 (degrees) _`!@  
TETX   1   3        -0.20000000     0.54897548     0.00494314     0.20000000     0.54897548     0.00494314 zT}Qrf~  
Change in Focus                :       0.000000                            0.000000 9E{Bn#  
Tilt Y tolerance on surfaces 1 through 3 (degrees) \mZ\1wzn'{  
TETY   1   3        -0.20000000     0.54897548     0.00494314     0.20000000     0.54897548     0.00494314 ?i4}[q  
Change in Focus                :       0.000000                            0.000000 hA`>SkO  
Decenter X tolerance on surface 1 ZyqTtA!A  
TSDX   1            -0.20000000     0.53999563    -0.00403671     0.20000000     0.53999563    -0.00403671 `~( P  
Change in Focus                :       0.000000                            0.000000 \K 01F  
Decenter Y tolerance on surface 1 @URLFMFi  
TSDY   1            -0.20000000     0.53999563    -0.00403671     0.20000000     0.53999563    -0.00403671 SEY  
Change in Focus                :       0.000000                            0.000000 ki6`d?  
Tilt X tolerance on surface (degrees) 1 C]UBu-]#S  
TSTX   1            -0.20000000     0.42678383    -0.11724851     0.20000000     0.42678383    -0.11724851 %l@Q&)f8e  
Change in Focus                :       0.000000                            0.000000 to Ei4u)m  
Tilt Y tolerance on surface (degrees) 1 `+b>@2D_  
TSTY   1            -0.20000000     0.42678383    -0.11724851     0.20000000     0.42678383    -0.11724851 o"^}2^)_SR  
Change in Focus                :       0.000000                            0.000000 zx\N^R;Jq  
Decenter X tolerance on surface 2 4ei .-  
TSDX   2            -0.20000000     0.51705427    -0.02697807     0.20000000     0.51705427    -0.02697807 }+`W[h&u  
Change in Focus                :       0.000000                            0.000000 /2oTqEqaV  
Decenter Y tolerance on surface 2 Yt*M|0bL  
TSDY   2            -0.20000000     0.51705427    -0.02697807     0.20000000     0.51705427    -0.02697807 zY8"\ZB  
Change in Focus                :       0.000000                            0.000000 lh*m(  
Tilt X tolerance on surface (degrees) 2 @18@[ :d"  
TSTX   2            -0.20000000     0.35349910    -0.19053324     0.20000000     0.35349910    -0.19053324 d
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Change in Focus                :       0.000000                            0.000000 |0w'+HaE~N  
Tilt Y tolerance on surface (degrees) 2 G?QFF6)}!  
TSTY   2            -0.20000000     0.35349910    -0.19053324     0.20000000     0.35349910    -0.19053324 (H9%a-3  
Change in Focus                :       0.000000                            0.000000 -5\aL"?4  
Decenter X tolerance on surface 3  $JmL)r  
TSDX   3            -0.20000000     0.53419039    -0.00984195     0.20000000     0.53419039    -0.00984195 :o$ R@l  
Change in Focus                :       0.000000                            0.000000 |6B:tw/.  
Decenter Y tolerance on surface 3 O#A1)~  
TSDY   3            -0.20000000     0.53419039    -0.00984195     0.20000000     0.53419039    -0.00984195 bWv6gOPR3  
Change in Focus                :       0.000000                            0.000000 -mZo`  
Tilt X tolerance on surface (degrees) 3 q9qmz[  
TSTX   3            -0.20000000     0.42861670    -0.11541563     0.20000000     0.42861670    -0.11541563 $XFG1?L!  
Change in Focus                :       0.000000                            0.000000 )iy>sa{  
Tilt Y tolerance on surface (degrees) 3 e%G-+6  
TSTY   3            -0.20000000     0.42861670    -0.11541563     0.20000000     0.42861670    -0.11541563 8{Y ?;~G  
Change in Focus                :       0.000000                            0.000000 P<kTjG  
Irregularity of surface 1 in fringes &tZ?%sr  
TIRR   1            -0.20000000     0.50973587    -0.03429647     0.20000000     0.57333868     0.02930634 }Iub{30mp  
Change in Focus                :       0.000000                            0.000000 )T#;1qNB  
Irregularity of surface 2 in fringes U6X
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TIRR   2            -0.20000000     0.53400904    -0.01002330     0.20000000     0.55360281     0.00957047 ^iubqtT]  
Change in Focus                :       0.000000                            0.000000 S^)r,cC  
Irregularity of surface 3 in fringes *D<S \6=  
TIRR   3            -0.20000000     0.58078982     0.03675748     0.20000000     0.49904394    -0.04498840 uGl0z79  
Change in Focus                :       0.000000                            0.000000 oAWk<B(@  
Index tolerance on surface 1 aJMh>  
TIND   1            -0.00100000     0.52606778    -0.01796456     0.00100000     0.56121811     0.01718578 >^:g[6Sj  
Change in Focus                :       0.000000                            0.000000 o;Zoj}  
Index tolerance on surface 2 `#fOY$#XB  
TIND   2            -0.00100000     0.55639086     0.01235852     0.00100000     0.53126361    -0.01276872 CpS'2@6  
Change in Focus                :       0.000000                           -0.000000 ~B(]0:  
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Worst offenders: NOx&`OU
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Type                      Value      Criterion        Change G !1- 20  
TSTY   2            -0.20000000     0.35349910    -0.19053324 &t%CuU]/@  
TSTY   2             0.20000000     0.35349910    -0.19053324 SX^fh
.  
TSTX   2            -0.20000000     0.35349910    -0.19053324 5F2+o#*h  
TSTX   2             0.20000000     0.35349910    -0.19053324 8tA.d.8  
TSTY   1            -0.20000000     0.42678383    -0.11724851 NG'VlT  
TSTY   1             0.20000000     0.42678383    -0.11724851 o9wg<LP  
TSTX   1            -0.20000000     0.42678383    -0.11724851 CG9X3%xO%  
TSTX   1             0.20000000     0.42678383    -0.11724851 lha)'
 
TSTY   3            -0.20000000     0.42861670    -0.11541563 8fM}UZI  
TSTY   3             0.20000000     0.42861670    -0.11541563 xOT'4v&.  
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Estimated Performance Changes based upon Root-Sum-Square method: 42p6l  
Nominal MTF                 :     0.54403234 (dMFYL>YP  
Estimated change            :    -0.36299231 0*3 <}  
Estimated MTF               :     0.18104003 --.j&w  
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Compensator Statistics: IU$bP#<  
Change in back focus: C2<y(GU[Bh  
Minimum            :        -0.000000 f=K1ZD  
Maximum            :         0.000000 +crAkb}i  
Mean               :        -0.000000 IJ4"X#Q/  
Standard Deviation :         0.000000 MCh8Q|Yx4  
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Monte Carlo Analysis: WP]<\_r2  
Number of trials: 20 =AD/5E,3  
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Initial Statistics: Normal Distribution M8[YW|VkP  
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  Trial       Criterion        Change nrt0[E-&~  
      1     0.42804416    -0.11598818 rG\m]C3
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Change in Focus                :      -0.400171 MT6kJDyLu  
      2     0.54384387    -0.00018847 &]LwK5SR  
Change in Focus                :       1.018470 5?O/Aub  
      3     0.44510003    -0.09893230 Vj2GK"$v  
Change in Focus                :      -0.601922 =rBFMTllM  
      4     0.18154684    -0.36248550 ,xTbt4J  
Change in Focus                :       0.920681 #Ejly2C,  
      5     0.28665820    -0.25737414 vhL&az  
Change in Focus                :       1.253875 5)nv  
      6     0.21263372    -0.33139862 NWAF4i
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Change in Focus                :      -0.903878 DGd&x^C  
      7     0.40051424    -0.14351809 LpmspIPvf  
Change in Focus                :      -1.354815 B8_l+dXO  
      8     0.48754161    -0.05649072 a^=4'.ok  
Change in Focus                :       0.215922 chd${ j  
      9     0.40357468    -0.14045766 pM46I"  
Change in Focus                :       0.281783 VBH[aIW  
     10     0.26315315    -0.28087919 3Aj_,&X.@(  
Change in Focus                :      -1.048393 rqF PUp  
     11     0.26120585    -0.28282649 /6q/`vx@  
Change in Focus                :       1.017611 g$ 2M|Q  
     12     0.24033815    -0.30369419 /ruf1?\,R  
Change in Focus                :      -0.109292 ;! 9_5Ar%  
     13     0.37164046    -0.17239188 ! 4o
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Change in Focus                :      -0.692430 > T-O3/KN  
     14     0.48597489    -0.05805744 *z+\yfOO"  
Change in Focus                :      -0.662040 F}AbA pTv  
     15     0.21462327    -0.32940907 *$
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Change in Focus                :       1.611296 d|o"QYX  
     16     0.43378226    -0.11025008 l?R_wu,Q  
Change in Focus                :      -0.640081 aDOH3Ri0K!  
     17     0.39321881    -0.15081353 J<BdIKCma  
Change in Focus                :       0.914906 +.N;h-
'  
     18     0.20692530    -0.33710703 W@ Z=1y  
Change in Focus                :       0.801607 }cPV_^{  
     19     0.51374068    -0.03029165 >bZ#  
Change in Focus                :       0.947293 #KK(Z\;  
     20     0.38013374    -0.16389860 yBe/UFp+  
Change in Focus                :       0.667010 f.f4<_v'h  
PaDT)RrEM  
Number of traceable Monte Carlo files generated: 20 \6'A^cE/PX  
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Nominal     0.54403234 RdDcMZ  
Best        0.54384387    Trial     2 ZbrE m  
Worst       0.18154684    Trial     4 = ]@xXVf/  
Mean        0.35770970 ua[\npz5  
Std Dev     0.11156454 !<LS4s;  
qnS7z%H8  
;VuB8cnL`  
Compensator Statistics: 1(?J>{-lw  
Change in back focus: kp6x6%{K\  
Minimum            :        -1.354815 5&kR1Bp#-  
Maximum            :         1.611296  qN QsU  
Mean               :         0.161872 QVH_B+ Q  
Standard Deviation :         0.869664 -J30g\  
Q|1bF!#(1  
90% >       0.20977951               C\; 8l}t  
80% >       0.22748071               {S}@P~H=  
50% >       0.38667627               MYPcH\K$h  
20% >       0.46553746               *nc4X9  
10% >       0.50064115                {DK:"ep  
bn`zI~WS  
End of Run. S|J8:-  
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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 5QSmim  

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 d0=nAZZ  
G8s`<:9*  
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                 0 MIMs#  
80% >       0.22748071                 r?!xL\C\  
50% >       0.38667627                 m-89nOls  
20% >       0.46553746                 ,}tdfkZFYl  
10% >       0.50064115 Jg:-TK/  
mr!I}I7x&x  
最后这个数值是MTF值呢，还是MTF的公差？  nvPE N  
zy[=OX+  
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？？？   |T_Pz&-  
&HK
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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  : !)/iRw9re  
90% >       0.20977951                 <W51oO  
80% >       0.22748071                 gZ"{{#:}  
50% >       0.38667627                 id tQXwa  
20% >       0.46553746                 `Kc %S^C'  
10% >       0.50064115 sRyw\v-=P  
....... o`K^Wy~+k#  

Uaj`  
R;E"Qdt  
这些数值都是MTF值

Criterion           : Geometric MTF average S&T at 30.0000 cycles per mm   +/3 Z  
Mode                : Sensitivities cUZ!;*  
Sampling            : 2 T]nR=uK6LL  
Nominal Criterion   : 0.54403234 RC8)f8n  
Test Wavelength     : 0.6328 ~f=6?5.wa  
\buZ?  
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 5F4+  
$&=4.7Yt  
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