[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 O>~ozW&  
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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 KgCQ4w9  
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图片:2.jpg

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然后运行分析的结果如下： THXG~3J<  
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Analysis of Tolerances FfET45"l  
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File : E:\光学设计资料\zemax练习\f500.ZMX `&rt>Bk /  
Title: |mO4+:-~D+  
Date : TUE JUN 21 2011 x8v2mnk  
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Units are Millimeters. k5X& |L/  
All changes are computed using linear differences. D)my@W0,  
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Paraxial Focus compensation only. OY?x'h  
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WARNING: Solves should be removed prior to tolerancing. tPb$ua|  
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Mnemonics: 8E:d!?<^&I  
TFRN: Tolerance on curvature in fringes. F\"`^`(O  
TTHI: Tolerance on thickness. Bf-KCqC".  
TSDX: Tolerance on surface decentering in x. l^,"^vz  
TSDY: Tolerance on surface decentering in y. j1Q"s(  
TSTX: Tolerance on surface tilt in x (degrees). WdvXVF  
TSTY: Tolerance on surface tilt in y (degrees). $w@0}5Q  
TIRR: Tolerance on irregularity (fringes). Y8$,So>~  
TIND: Tolerance on Nd index of refraction. <JyF5  
TEDX: Tolerance on element decentering in x. ,^#{k!uaC{  
TEDY: Tolerance on element decentering in y. ]=EYju@  
TETX: Tolerance on element tilt in x (degrees). =SEgv;#KZ~  
TETY: Tolerance on element tilt in y (degrees). tXWhq  
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WARNING: RAY AIMING IS OFF. Very loose tolerances may not be computed accurately. '9R.$,N  
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WARNING: Boundary constraints on compensators will be ignored. =,4iMENm!  
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Criterion           : Geometric MTF average S&T at 30.0000 cycles per mm ?-HLP%C('  
Mode                : Sensitivities m+7/ebj{A  
Sampling            : 2 0qPbmLMK  
Nominal Criterion   : 0.54403234 zP(UaSXz/  
Test Wavelength     : 0.6328 %Uz 5Ve  
^zs]cFN#%  
6bXP{,}Gp  
Fields: XY Symmetric Angle in degrees bWe_<'N  
#      X-Field      Y-Field       Weight    VDX    VDY    VCX    VCY /`b(} m  
1   0.000E+000   0.000E+000   1.000E+000  0.000  0.000  0.000  0.000 *Mg. *N  
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Sensitivity Analysis: `YinhO:Z  
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                 |----------------- Minimum ----------------| |----------------- Maximum ----------------| c%bGVRhE  
Type                      Value      Criterion        Change          Value      Criterion        Change GqT0SP  
Fringe tolerance on surface 1 #XaTUT  
TFRN   1            -1.00000000     0.54257256    -0.00145977     1.00000000     0.54548607     0.00145374 MS~|F^g  
Change in Focus                :      -0.000000                            0.000000 <PayP3E
 
Fringe tolerance on surface 2 `c)//o  
TFRN   2            -1.00000000     0.54177471    -0.00225762     1.00000000     0.54627463     0.00224230 0M=U>g)  
Change in Focus                :       0.000000                            0.000000 Az
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Fringe tolerance on surface 3 eInx\/  
TFRN   3            -1.00000000     0.54779866     0.00376632     1.00000000     0.54022572    -0.00380662 km(Mv  
Change in Focus                :      -0.000000                            0.000000 hj_%'kk-A  
Thickness tolerance on surface 1 wj$J}F  
TTHI   1   3        -0.20000000     0.54321462    -0.00081772     0.20000000     0.54484759     0.00081525 42Vz6 k:  
Change in Focus                :       0.000000                            0.000000 CI~P3"`]  
Thickness tolerance on surface 2 XC D&Im  
TTHI   2   3        -0.20000000     0.54478712     0.00075478     0.20000000     0.54327558    -0.00075675 pFZ2(b&  
Change in Focus                :       0.000000                           -0.000000 7Y?=ijXXx\  
Decenter X tolerance on surfaces 1 through 3 ~}g"Fe  
TEDX   1   3        -0.20000000     0.54401464   -1.7700E-005     0.20000000     0.54401464   -1.7700E-005 .-[d6Pn
w  
Change in Focus                :       0.000000                            0.000000 rpZ^R}B%*v  
Decenter Y tolerance on surfaces 1 through 3 bhqs%B!:  
TEDY   1   3        -0.20000000     0.54401464   -1.7700E-005     0.20000000     0.54401464   -1.7700E-005 o_K. +^$  
Change in Focus                :       0.000000                            0.000000 Bn5O;I13  
Tilt X tolerance on surfaces 1 through 3 (degrees) 9PM\D@A{  
TETX   1   3        -0.20000000     0.54897548     0.00494314     0.20000000     0.54897548     0.00494314 Uo7V)I;o  
Change in Focus                :       0.000000                            0.000000 n> >!dg Og  
Tilt Y tolerance on surfaces 1 through 3 (degrees) @/w($w"  
TETY   1   3        -0.20000000     0.54897548     0.00494314     0.20000000     0.54897548     0.00494314 "0&+`7  
Change in Focus                :       0.000000                            0.000000 bc{ {a  
Decenter X tolerance on surface 1 ;Az9p h  
TSDX   1            -0.20000000     0.53999563    -0.00403671     0.20000000     0.53999563    -0.00403671 &QoV(%:]  
Change in Focus                :       0.000000                            0.000000 jYv`kt  
Decenter Y tolerance on surface 1 W_C#a'$  
TSDY   1            -0.20000000     0.53999563    -0.00403671     0.20000000     0.53999563    -0.00403671 x2KIGG^  
Change in Focus                :       0.000000                            0.000000 xXJl Qbs  
Tilt X tolerance on surface (degrees) 1 QQB\$[M!Z  
TSTX   1            -0.20000000     0.42678383    -0.11724851     0.20000000     0.42678383    -0.11724851 EzXGb  
Change in Focus                :       0.000000                            0.000000 rerl-T<3  
Tilt Y tolerance on surface (degrees) 1 ~ e4Pj`?=K  
TSTY   1            -0.20000000     0.42678383    -0.11724851     0.20000000     0.42678383    -0.11724851 .+'`A"$8  
Change in Focus                :       0.000000                            0.000000 &f:"p*=a\  
Decenter X tolerance on surface 2 SG)hrd  
TSDX   2            -0.20000000     0.51705427    -0.02697807     0.20000000     0.51705427    -0.02697807 T"NDL[*  
Change in Focus                :       0.000000                            0.000000 n&51_.@Q  
Decenter Y tolerance on surface 2 4Hk eXS.  
TSDY   2            -0.20000000     0.51705427    -0.02697807     0.20000000     0.51705427    -0.02697807 BfcpB)N&.K  
Change in Focus                :       0.000000                            0.000000 O=9mLI6  
Tilt X tolerance on surface (degrees) 2 !D_Qat  
TSTX   2            -0.20000000     0.35349910    -0.19053324     0.20000000     0.35349910    -0.19053324 -j6&W`  
Change in Focus                :       0.000000                            0.000000 _9^  
Tilt Y tolerance on surface (degrees) 2 lhyWlO  
TSTY   2            -0.20000000     0.35349910    -0.19053324     0.20000000     0.35349910    -0.19053324 RkrZncBgV<  
Change in Focus                :       0.000000                            0.000000 |@rPd=G^(/  
Decenter X tolerance on surface 3 4^Ke
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TSDX   3            -0.20000000     0.53419039    -0.00984195     0.20000000     0.53419039    -0.00984195 iEtnwSt  
Change in Focus                :       0.000000                            0.000000 [xTu29X.  
Decenter Y tolerance on surface 3 *gJ:irah  
TSDY   3            -0.20000000     0.53419039    -0.00984195     0.20000000     0.53419039    -0.00984195 ~ PO)>;  
Change in Focus                :       0.000000                            0.000000 *G<K@k  
Tilt X tolerance on surface (degrees) 3 3Pj 6(cf  
TSTX   3            -0.20000000     0.42861670    -0.11541563     0.20000000     0.42861670    -0.11541563 ~.FZF  
Change in Focus                :       0.000000                            0.000000 rhLm2q  
Tilt Y tolerance on surface (degrees) 3 s Y^#I  
TSTY   3            -0.20000000     0.42861670    -0.11541563     0.20000000     0.42861670    -0.11541563 +E{'A7im8=  
Change in Focus                :       0.000000                            0.000000 )_|;h2I  
Irregularity of surface 1 in fringes O e-FI+7  
TIRR   1            -0.20000000     0.50973587    -0.03429647     0.20000000     0.57333868     0.02930634  &Ow[  
Change in Focus                :       0.000000                            0.000000 u; c)Tt  
Irregularity of surface 2 in fringes E&}@P0^  
TIRR   2            -0.20000000     0.53400904    -0.01002330     0.20000000     0.55360281     0.00957047 #LGAvFA*_F  
Change in Focus                :       0.000000                            0.000000 rYp]RX>  
Irregularity of surface 3 in fringes L=ala1{O  
TIRR   3            -0.20000000     0.58078982     0.03675748     0.20000000     0.49904394    -0.04498840 Q*W`mFul  
Change in Focus                :       0.000000                            0.000000 v(=?ge YLo  
Index tolerance on surface 1 g3}K  
TIND   1            -0.00100000     0.52606778    -0.01796456     0.00100000     0.56121811     0.01718578 KfSI6 Y_  
Change in Focus                :       0.000000                            0.000000 jJ}3WJ  
Index tolerance on surface 2 LQ7.RK  
TIND   2            -0.00100000     0.55639086     0.01235852     0.00100000     0.53126361    -0.01276872 6@"lIKeP  
Change in Focus                :       0.000000                           -0.000000 th$?#4SbR  
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Worst offenders: *?'^Rc  
Type                      Value      Criterion        Change QO0#p1fom'  
TSTY   2            -0.20000000     0.35349910    -0.19053324 {z4v_[-2CF  
TSTY   2             0.20000000     0.35349910    -0.19053324 9]{(~=D7  
TSTX   2            -0.20000000     0.35349910    -0.19053324 IQ${2Dpg[  
TSTX   2             0.20000000     0.35349910    -0.19053324 r34q9NFT5  
TSTY   1            -0.20000000     0.42678383    -0.11724851 o
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TSTY   1             0.20000000     0.42678383    -0.11724851 /M}jF*5N  
TSTX   1            -0.20000000     0.42678383    -0.11724851 D*Cn!v$  
TSTX   1             0.20000000     0.42678383    -0.11724851 0/1Ay{ns  
TSTY   3            -0.20000000     0.42861670    -0.11541563 &!@7+'])  
TSTY   3             0.20000000     0.42861670    -0.11541563 X^?M4  
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Estimated Performance Changes based upon Root-Sum-Square method: b,Z\{M:f;F  
Nominal MTF                 :     0.54403234 :y>$N(.8f  
Estimated change            :    -0.36299231 b3>`%?A  
Estimated MTF               :     0.18104003 d".Xp4}f  
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Compensator Statistics: "sM 3NY  
Change in back focus: CJ@G8>  
Minimum            :        -0.000000
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Maximum            :         0.000000 Pjs L{,
 
Mean               :        -0.000000 7a,/DI2o  
Standard Deviation :         0.000000 u%o2BLx  
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Monte Carlo Analysis: 0Gq}x;8H&  
Number of trials: 20 1>KZ1Kf  
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Initial Statistics: Normal Distribution wM]j#  
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  Trial       Criterion        Change 6lp.0B  
      1     0.42804416    -0.11598818 ceW,A`J  
Change in Focus                :      -0.400171 >~nc7j u  
      2     0.54384387    -0.00018847 ^Yz.}a##w2  
Change in Focus                :       1.018470 I6q]bQ="  
      3     0.44510003    -0.09893230 ySS kw7  
Change in Focus                :      -0.601922 ?`,Rkg0fe  
      4     0.18154684    -0.36248550 Cwb}$=p'  
Change in Focus                :       0.920681 55mDLiA  
      5     0.28665820    -0.25737414 T6P9Icv?@7  
Change in Focus                :       1.253875 ^lt;K{  
      6     0.21263372    -0.33139862 SR+<v=i  
Change in Focus                :      -0.903878 62}rZVJq  
      7     0.40051424    -0.14351809 -W#-m'Lvu  
Change in Focus                :      -1.354815 q1|! oQ  
      8     0.48754161    -0.05649072 /C'dW  
Change in Focus                :       0.215922 `egyk)"aM  
      9     0.40357468    -0.14045766 ~h:/9q  
Change in Focus                :       0.281783 B{In "R8  
     10     0.26315315    -0.28087919 J:N4F.o&K  
Change in Focus                :      -1.048393 
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     11     0.26120585    -0.28282649 /5PV|onO  
Change in Focus                :       1.017611 ]0g$3  
     12     0.24033815    -0.30369419 i uNBw]  
Change in Focus                :      -0.109292 zFR=inI  
     13     0.37164046    -0.17239188 r"%uP[H  
Change in Focus                :      -0.692430 cAL*Md8+  
     14     0.48597489    -0.05805744 5Tb3Yy< .  
Change in Focus                :      -0.662040 !9n!:"(r  
     15     0.21462327    -0.32940907 5ree3 quh  
Change in Focus                :       1.611296 }"sZ)FE  
     16     0.43378226    -0.11025008 A`H&"A  
Change in Focus                :      -0.640081 %Ob#GA+  
     17     0.39321881    -0.15081353 Ja*k|Rz~  
Change in Focus                :       0.914906 bnm3 cR:h"  
     18     0.20692530    -0.33710703 "1-|ahW  
Change in Focus                :       0.801607 ';CL;A;  
     19     0.51374068    -0.03029165 kOQq
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Change in Focus                :       0.947293 7[b]%i  
     20     0.38013374    -0.16389860 b{Qg$ZJeR  
Change in Focus                :       0.667010 _:0)uR LS  
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Number of traceable Monte Carlo files generated: 20 W=$cQ(x4Z  
B(omD3jzN  
Nominal     0.54403234 _LOV&83O(  
Best        0.54384387    Trial     2 bsn.HT"5  
Worst       0.18154684    Trial     4 Zl:Z31  
Mean        0.35770970 Mzbbr57n  
Std Dev     0.11156454 JyfWy  
a9w1Z4  
^EG@tB $<  
Compensator Statistics: /F3bZ3F  
Change in back focus: Bl >)GX\l  
Minimum            :        -1.354815 gmU0/z3&  
Maximum            :         1.611296 1Ar6hA  
Mean               :         0.161872 ,)CRozC\}K  
Standard Deviation :         0.869664 Hy_}e"  
Z,? T`[4B  
90% >       0.20977951               RyJN=;5p  
80% >       0.22748071               n*HRGJ  
50% >       0.38667627               gOE3x^X*{  
20% >       0.46553746               !OO{qw(*g  
10% >       0.50064115                =LsW\.T6  
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End of Run. mHnHB.OL  
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这就有了些疑问，为什么我选择的补偿器是近轴焦点，而分析结果近轴焦点都不变化？？应该是变得。另外最后的蒙特卡洛分析，只有10%的大于0.5（我用的是MTF作为评价方式），可是我设计的MTF如图 l$:.bwXXO  

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 !GNLq.rQ  
X53TFRxnT  
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                 #2F 6}  
80% >       0.22748071                 e' `xU  
50% >       0.38667627                 (f5v{S6b(  
20% >       0.46553746                 aWLeyXsAu  
10% >       0.50064115 f>u{e~Q,  
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最后这个数值是MTF值呢，还是MTF的公差？ Dm3/i|Y  
bEXm@-ou  
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？？？   Wgh4DhAW  
%7_c|G1  
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  : oZO6J-ea  
90% >       0.20977951                 eNlE]W,=  
80% >       0.22748071                 TEZ^Ia  
50% >       0.38667627                 YJw9 d]  
20% >       0.46553746                 PUB|XgQDY:  
10% >       0.50064115 (o_fY.  
....... uQN8/Gy*J  

j%iz>  
y2V
9!  
这些数值都是MTF值

Criterion           : Geometric MTF average S&T at 30.0000 cycles per mm   b=a&!r5M  
Mode                : Sensitivities ?H7*?HV  
Sampling            : 2 oC>QJ(o,8  
Nominal Criterion   : 0.54403234 Ebp^-I9.d  
Test Wavelength     : 0.6328 9Ot;R?>(  
*=L3bBu?  
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？
~$>l@> xX  
9|dgmEd  
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