[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 9QaEUy*,  
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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 #/'5N|?  
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图片:2.jpg

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然后运行分析的结果如下： ShAI6j  
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Analysis of Tolerances yZ t}Jnv  
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File : E:\光学设计资料\zemax练习\f500.ZMX #87:Or1  
Title: OHeVm-VC  
Date : TUE JUN 21 2011 K9co_n_L  
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Units are Millimeters. [xT2c.2__J  
All changes are computed using linear differences. ($^XF:#5  
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Paraxial Focus compensation only. /g3U,?qP  
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WARNING: Solves should be removed prior to tolerancing. GH2D5HVN  
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Mnemonics: ;L.@4b[lP  
TFRN: Tolerance on curvature in fringes. T69'ta32V  
TTHI: Tolerance on thickness. hPt(7E2ke~  
TSDX: Tolerance on surface decentering in x. wXf_2qB9  
TSDY: Tolerance on surface decentering in y. K1O0/2O  
TSTX: Tolerance on surface tilt in x (degrees). d_BO&k<+I  
TSTY: Tolerance on surface tilt in y (degrees). E 5PefD\m  
TIRR: Tolerance on irregularity (fringes). 6dO )]  
TIND: Tolerance on Nd index of refraction. GuMsw*{>  
TEDX: Tolerance on element decentering in x. SesJg~8  
TEDY: Tolerance on element decentering in y. 
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TETX: Tolerance on element tilt in x (degrees). 6P;JF%{J  
TETY: Tolerance on element tilt in y (degrees). P`wp`HI  
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WARNING: RAY AIMING IS OFF. Very loose tolerances may not be computed accurately. `i0RLGze  
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WARNING: Boundary constraints on compensators will be ignored. SEQ bw](ss  
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Criterion           : Geometric MTF average S&T at 30.0000 cycles per mm RrSo`q-h+  
Mode                : Sensitivities S/pTFlptCa  
Sampling            : 2 |S#)[83*3  
Nominal Criterion   : 0.54403234 N?0T3-/K  
Test Wavelength     : 0.6328 P X?!R4S  
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Fields: XY Symmetric Angle in degrees .Rxz;-VA  
#      X-Field      Y-Field       Weight    VDX    VDY    VCX    VCY l=%v  
1   0.000E+000   0.000E+000   1.000E+000  0.000  0.000  0.000  0.000 ipfiarT~)  
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Sensitivity Analysis: Qy |*[  
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                 |----------------- Minimum ----------------| |----------------- Maximum ----------------| nb0V~W  
Type                      Value      Criterion        Change          Value      Criterion        Change
;Ad$Q9)EE  
Fringe tolerance on surface 1 +9>t; Ty  
TFRN   1            -1.00000000     0.54257256    -0.00145977     1.00000000     0.54548607     0.00145374 _O~DJ"  
Change in Focus                :      -0.000000                            0.000000 jLc4D'  
Fringe tolerance on surface 2 gTZ1LJ  
TFRN   2            -1.00000000     0.54177471    -0.00225762     1.00000000     0.54627463     0.00224230 w$UWfL(  
Change in Focus                :       0.000000                            0.000000 <T JUKznO  
Fringe tolerance on surface 3 lCg'K(|"  
TFRN   3            -1.00000000     0.54779866     0.00376632     1.00000000     0.54022572    -0.00380662 j.X3SQb4G  
Change in Focus                :      -0.000000                            0.000000 rmutw~nHD  
Thickness tolerance on surface 1 W>036  
TTHI   1   3        -0.20000000     0.54321462    -0.00081772     0.20000000     0.54484759     0.00081525 C0;c'4(  
Change in Focus                :       0.000000                            0.000000 %{s<h6{R  
Thickness tolerance on surface 2 k_.%(ZE  
TTHI   2   3        -0.20000000     0.54478712     0.00075478     0.20000000     0.54327558    -0.00075675 n\&[^Q#b|  
Change in Focus                :       0.000000                           -0.000000 .0;Z:x_3  
Decenter X tolerance on surfaces 1 through 3 <m"Zk k  
TEDX   1   3        -0.20000000     0.54401464   -1.7700E-005     0.20000000     0.54401464   -1.7700E-005 S!cc%  
Change in Focus                :       0.000000                            0.000000 ;_)&#X,?(  
Decenter Y tolerance on surfaces 1 through 3 ]Ow A>fb  
TEDY   1   3        -0.20000000     0.54401464   -1.7700E-005     0.20000000     0.54401464   -1.7700E-005 )x
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Change in Focus                :       0.000000                            0.000000 +|MHiC  
Tilt X tolerance on surfaces 1 through 3 (degrees) D
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TETX   1   3        -0.20000000     0.54897548     0.00494314     0.20000000     0.54897548     0.00494314 HYf&0LT<11  
Change in Focus                :       0.000000                            0.000000 r`}')2  
Tilt Y tolerance on surfaces 1 through 3 (degrees) 7*]O]6rP  
TETY   1   3        -0.20000000     0.54897548     0.00494314     0.20000000     0.54897548     0.00494314 z/aZ
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Change in Focus                :       0.000000                            0.000000 =dz  iR_  
Decenter X tolerance on surface 1 EQXvEJ^  
TSDX   1            -0.20000000     0.53999563    -0.00403671     0.20000000     0.53999563    -0.00403671 U7(84k\j  
Change in Focus                :       0.000000                            0.000000 E\&~S+:Xp  
Decenter Y tolerance on surface 1
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TSDY   1            -0.20000000     0.53999563    -0.00403671     0.20000000     0.53999563    -0.00403671 BXyg ?  
Change in Focus                :       0.000000                            0.000000 J@w Q3#5a  
Tilt X tolerance on surface (degrees) 1 s,O:l0  
TSTX   1            -0.20000000     0.42678383    -0.11724851     0.20000000     0.42678383    -0.11724851 \&|)?'8rS  
Change in Focus                :       0.000000                            0.000000 .~qu,q7k~  
Tilt Y tolerance on surface (degrees) 1 X*6bsYbK-  
TSTY   1            -0.20000000     0.42678383    -0.11724851     0.20000000     0.42678383    -0.11724851 s0 hD;`cm  
Change in Focus                :       0.000000                            0.000000 > !k  
Decenter X tolerance on surface 2  chW 1UE  
TSDX   2            -0.20000000     0.51705427    -0.02697807     0.20000000     0.51705427    -0.02697807 3 4CqLPg8  
Change in Focus                :       0.000000                            0.000000 l -us j%\  
Decenter Y tolerance on surface 2 =B_v
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TSDY   2            -0.20000000     0.51705427    -0.02697807     0.20000000     0.51705427    -0.02697807 `)$'1,]u  
Change in Focus                :       0.000000                            0.000000 p=_K P9  
Tilt X tolerance on surface (degrees) 2 2bwf(  
TSTX   2            -0.20000000     0.35349910    -0.19053324     0.20000000     0.35349910    -0.19053324 zts%oIgV  
Change in Focus                :       0.000000                            0.000000 <z+5+h|^  
Tilt Y tolerance on surface (degrees) 2 < TJzp  
TSTY   2            -0.20000000     0.35349910    -0.19053324     0.20000000     0.35349910    -0.19053324 F1%-IBe  
Change in Focus                :       0.000000                            0.000000 :4|ubu  
Decenter X tolerance on surface 3 Mq;m+{B  
TSDX   3            -0.20000000     0.53419039    -0.00984195     0.20000000     0.53419039    -0.00984195 zLdi  
Change in Focus                :       0.000000                            0.000000 Hy~kHBIL  
Decenter Y tolerance on surface 3 CL oc  
TSDY   3            -0.20000000     0.53419039    -0.00984195     0.20000000     0.53419039    -0.00984195 W
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Change in Focus                :       0.000000                            0.000000 "pGSz%i-  
Tilt X tolerance on surface (degrees) 3 o8c4h<,  
TSTX   3            -0.20000000     0.42861670    -0.11541563     0.20000000     0.42861670    -0.11541563 [`^5Zb  
Change in Focus                :       0.000000                            0.000000 6jT+kq)  
Tilt Y tolerance on surface (degrees) 3 3:1 h:Yc<  
TSTY   3            -0.20000000     0.42861670    -0.11541563     0.20000000     0.42861670    -0.11541563 X@JrfvKv[d  
Change in Focus                :       0.000000                            0.000000 ib8@U}Vn1  
Irregularity of surface 1 in fringes QQ^P IQj  
TIRR   1            -0.20000000     0.50973587    -0.03429647     0.20000000     0.57333868     0.02930634 i
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Change in Focus                :       0.000000                            0.000000 *^+8_%;1  
Irregularity of surface 2 in fringes swEE >=  
TIRR   2            -0.20000000     0.53400904    -0.01002330     0.20000000     0.55360281     0.00957047 +Zgh[a  
Change in Focus                :       0.000000                            0.000000 }_m/3*x_  
Irregularity of surface 3 in fringes W=j  
TIRR   3            -0.20000000     0.58078982     0.03675748     0.20000000     0.49904394    -0.04498840 | wuUH  
Change in Focus                :       0.000000                            0.000000 >DqV^%2l  
Index tolerance on surface 1 uaN0X"  
TIND   1            -0.00100000     0.52606778    -0.01796456     0.00100000     0.56121811     0.01718578 H|&[,&M>  
Change in Focus                :       0.000000                            0.000000 ,q$'hYTaJ  
Index tolerance on surface 2 R+Q..9P  
TIND   2            -0.00100000     0.55639086     0.01235852     0.00100000     0.53126361    -0.01276872 <RQ
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Change in Focus                :       0.000000                           -0.000000 _s{on/u  
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Worst offenders: SJ4[n.tPI  
Type                      Value      Criterion        Change 5{?J5  
TSTY   2            -0.20000000     0.35349910    -0.19053324 ;G!JKg  
TSTY   2             0.20000000     0.35349910    -0.19053324 O3H dPQ  
TSTX   2            -0.20000000     0.35349910    -0.19053324 YmXh_bk  
TSTX   2             0.20000000     0.35349910    -0.19053324 HX\^ecZ#E  
TSTY   1            -0.20000000     0.42678383    -0.11724851 @}sxA9a  
TSTY   1             0.20000000     0.42678383    -0.11724851 ^]_[dqd  
TSTX   1            -0.20000000     0.42678383    -0.11724851 znm3b8ns  
TSTX   1             0.20000000     0.42678383    -0.11724851 p2Yc:9r9+A  
TSTY   3            -0.20000000     0.42861670    -0.11541563 &|cg`m  
TSTY   3             0.20000000     0.42861670    -0.11541563 I29aj
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Estimated Performance Changes based upon Root-Sum-Square method: Kxs_R#k  
Nominal MTF                 :     0.54403234 V80BO#Pk  
Estimated change            :    -0.36299231 'a8{YT4  
Estimated MTF               :     0.18104003 ! *Snx  
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Compensator Statistics: S+aXlb  
Change in back focus: 1yHlBeEC  
Minimum            :        -0.000000 )nncCUW  
Maximum            :         0.000000 BC|=-^(  
Mean               :        -0.000000 tS|gQUF17  
Standard Deviation :         0.000000 |T!ivd1G  
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Monte Carlo Analysis: 'vbrzI5m  
Number of trials: 20 1?k{jt~  
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Initial Statistics: Normal Distribution -2Bkun4Pt  
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  Trial       Criterion        Change 3-^z<*  
      1     0.42804416    -0.11598818 pGS!Nn;K2  
Change in Focus                :      -0.400171 `x
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      2     0.54384387    -0.00018847 ]Dj,8tf`H  
Change in Focus                :       1.018470 {,V.IDs8[  
      3     0.44510003    -0.09893230 C%#%_
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Change in Focus                :      -0.601922 8n_!WDD  
      4     0.18154684    -0.36248550 `cu W^/c  
Change in Focus                :       0.920681 ddR*&.Y!a  
      5     0.28665820    -0.25737414 LBO3){=J  
Change in Focus                :       1.253875 ~< ~PaP$=\  
      6     0.21263372    -0.33139862 (6b*
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Change in Focus                :      -0.903878 ^g^R[8  
      7     0.40051424    -0.14351809 &~9'7 n!  
Change in Focus                :      -1.354815 zn!H&!8&  
      8     0.48754161    -0.05649072 u`K)dH,  
Change in Focus                :       0.215922 W|C>X=zTi  
      9     0.40357468    -0.14045766 k9]M=eO  
Change in Focus                :       0.281783 OPi><8x  
     10     0.26315315    -0.28087919 gXrXVv<)yw  
Change in Focus                :      -1.048393 kBF.TGT[l  
     11     0.26120585    -0.28282649 DcjF$E  
Change in Focus                :       1.017611 32#|BBY  
     12     0.24033815    -0.30369419 (T
&rvE  
Change in Focus                :      -0.109292 :.2Tcq  
     13     0.37164046    -0.17239188 c:[z({
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Change in Focus                :      -0.692430 rf}@16O$'  
     14     0.48597489    -0.05805744 )(^L*  
Change in Focus                :      -0.662040 mI$<+S1!  
     15     0.21462327    -0.32940907
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Change in Focus                :       1.611296 %8U/!(.g  
     16     0.43378226    -0.11025008 ,tZJSfHB  
Change in Focus                :      -0.640081 pv LA:LW2  
     17     0.39321881    -0.15081353 }M
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Change in Focus                :       0.914906 |<:Owd=  
     18     0.20692530    -0.33710703 roiUVisq*  
Change in Focus                :       0.801607 B<V8:vOam  
     19     0.51374068    -0.03029165 .N:& {$o:  
Change in Focus                :       0.947293 =x_~7 Xc{  
     20     0.38013374    -0.16389860 IF>dsAAI<  
Change in Focus                :       0.667010 Njp?/r  
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Number of traceable Monte Carlo files generated: 20 Bsr;MVD  
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Nominal     0.54403234 /=y _#l  
Best        0.54384387    Trial     2 u*W6fg/"  
Worst       0.18154684    Trial     4 pgp@Zw)r)k  
Mean        0.35770970 te<lCD6  
Std Dev     0.11156454 {hP_"nN#  
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Compensator Statistics: ?.*^#>
-  
Change in back focus:  _klT  
Minimum            :        -1.354815 w!G
PPW(  
Maximum            :         1.611296 J>o%6D  
Mean               :         0.161872 f3[/zcm;  
Standard Deviation :         0.869664 Tgf\f%,h  
AlVBhR`  
90% >       0.20977951               *_qLLJg  
80% >       0.22748071               Z?@oe-mz  
50% >       0.38667627               M15jwR!:M  
20% >       0.46553746               i(hL6DLD  
10% >       0.50064115                F4b$  
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End of Run. z\kiYQ6kA  
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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 WP}NHz4H  

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 Z<Rhn  
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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                 IE0hC\C}  
80% >       0.22748071                 i^Ip+J+[  
50% >       0.38667627                 a0
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20% >       0.46553746                 d95 $w8>  
10% >       0.50064115  Qk)E:  
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最后这个数值是MTF值呢，还是MTF的公差？ !\hUjM+(}  
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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？？？   b
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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  : pe@j`Sm:Ej  
90% >       0.20977951                 {OGv1\ol&  
80% >       0.22748071                 uh 3yiDj@a  
50% >       0.38667627                  Y!*F-v@  
20% >       0.46553746                 wzNGL{3  
10% >       0.50064115 G~FAChI8![  
....... 4O1[D?)`x  

Puodsd  
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这些数值都是MTF值

Criterion           : Geometric MTF average S&T at 30.0000 cycles per mm   aA3KJa  
Mode                : Sensitivities p6|RV(?8  
Sampling            : 2 o@j)clf  
Nominal Criterion   : 0.54403234 YIZ+BVa  
Test Wavelength     : 0.6328 C[IY9s:Pf  
]aqg{XdGt  
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？ ,'c?^ $J|z  
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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