[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=u[ 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 *H/>96  
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图片:2.jpg

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然后运行分析的结果如下： boojq{cvYA  
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Analysis of Tolerances TdPd8ig8{  
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File : E:\光学设计资料\zemax练习\f500.ZMX d`/8Q9tQ  
Title: Ll KO(Q{"  
Date : TUE JUN 21 2011 ?;l@yx  
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Units are Millimeters. M@T{uo  
All changes are computed using linear differences. iDDJJ>F26  
#zP-,2!r  
Paraxial Focus compensation only. ^Q#_  
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WARNING: Solves should be removed prior to tolerancing. <6(0ZO%,C!  
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Mnemonics: :aOR@])>o  
TFRN: Tolerance on curvature in fringes. >*EZZ\eU!  
TTHI: Tolerance on thickness. DQ8/]Z{H  
TSDX: Tolerance on surface decentering in x. d}O\:\}y  
TSDY: Tolerance on surface decentering in y. b|
_e):V|  
TSTX: Tolerance on surface tilt in x (degrees). '#c#.O  
TSTY: Tolerance on surface tilt in y (degrees). Q>$B.z  
TIRR: Tolerance on irregularity (fringes). X
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TIND: Tolerance on Nd index of refraction. qiet<F  
TEDX: Tolerance on element decentering in x. fd4gB6>  
TEDY: Tolerance on element decentering in y. /Qst :q  
TETX: Tolerance on element tilt in x (degrees). I7_8oq\3D  
TETY: Tolerance on element tilt in y (degrees). 
'ayb`  
o%'1=d3R1Q  
WARNING: RAY AIMING IS OFF. Very loose tolerances may not be computed accurately. $R'?OK(`  
P6_Hz!vE  
WARNING: Boundary constraints on compensators will be ignored. frcX'M}%  
-L/%2 X  
Criterion           : Geometric MTF average S&T at 30.0000 cycles per mm H|aFs.SEQ  
Mode                : Sensitivities %fg6',2  
Sampling            : 2 #H7 SLQr\  
Nominal Criterion   : 0.54403234 y`j_]qvt  
Test Wavelength     : 0.6328 p*PzfSLN  
YH58p&up  
_jX,1+M  
Fields: XY Symmetric Angle in degrees 5=V"tQ&d9U  
#      X-Field      Y-Field       Weight    VDX    VDY    VCX    VCY *w;?&)8%  
1   0.000E+000   0.000E+000   1.000E+000  0.000  0.000  0.000  0.000 6-\Mf:%B  
>\K=)/W2  
Sensitivity Analysis: N&G'i.w/  
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                 |----------------- Minimum ----------------| |----------------- Maximum ----------------| yhgGvyD
 
Type                      Value      Criterion        Change          Value      Criterion        Change ovN3.0tAI  
Fringe tolerance on surface 1 fYuSfB+<  
TFRN   1            -1.00000000     0.54257256    -0.00145977     1.00000000     0.54548607     0.00145374 |]<#![!h
#  
Change in Focus                :      -0.000000                            0.000000 G$a@}9V  
Fringe tolerance on surface 2 &/[MWQ  
TFRN   2            -1.00000000     0.54177471    -0.00225762     1.00000000     0.54627463     0.00224230 N?m)u,6-l  
Change in Focus                :       0.000000                            0.000000 z#!<[**&  
Fringe tolerance on surface 3 vFL$wr  
TFRN   3            -1.00000000     0.54779866     0.00376632     1.00000000     0.54022572    -0.00380662 te[uAJ1 N  
Change in Focus                :      -0.000000                            0.000000 ga|<S@u?}  
Thickness tolerance on surface 1 m|fcWN[  
TTHI   1   3        -0.20000000     0.54321462    -0.00081772     0.20000000     0.54484759     0.00081525 2W0nA t  
Change in Focus                :       0.000000                            0.000000 P]m{\K  
Thickness tolerance on surface 2 s YTJ^Kd  
TTHI   2   3        -0.20000000     0.54478712     0.00075478     0.20000000     0.54327558    -0.00075675 KK 7}q<&i  
Change in Focus                :       0.000000                           -0.000000 1^^{;R7N  
Decenter X tolerance on surfaces 1 through 3 GI{EP&C  
TEDX   1   3        -0.20000000     0.54401464   -1.7700E-005     0.20000000     0.54401464   -1.7700E-005 7W}%ralkg  
Change in Focus                :       0.000000                            0.000000 lrc%GU):  
Decenter Y tolerance on surfaces 1 through 3 T[OI/
WuK  
TEDY   1   3        -0.20000000     0.54401464   -1.7700E-005     0.20000000     0.54401464   -1.7700E-005 wDi/oH/H  
Change in Focus                :       0.000000                            0.000000 5 v.&|[\k  
Tilt X tolerance on surfaces 1 through 3 (degrees) >&HW6 c  
TETX   1   3        -0.20000000     0.54897548     0.00494314     0.20000000     0.54897548     0.00494314 TNh&g.  
Change in Focus                :       0.000000                            0.000000 ~H#c-B  
Tilt Y tolerance on surfaces 1 through 3 (degrees) ,l AZ4  
TETY   1   3        -0.20000000     0.54897548     0.00494314     0.20000000     0.54897548     0.00494314 f~l pa7  
Change in Focus                :       0.000000                            0.000000 .pZYPKMaE  
Decenter X tolerance on surface 1 +8ib928E  
TSDX   1            -0.20000000     0.53999563    -0.00403671     0.20000000     0.53999563    -0.00403671 zq+2@"q  
Change in Focus                :       0.000000                            0.000000
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Decenter Y tolerance on surface 1 N'{Yhx u  
TSDY   1            -0.20000000     0.53999563    -0.00403671     0.20000000     0.53999563    -0.00403671 &p#PYs|H  
Change in Focus                :       0.000000                            0.000000 Ag T)J  
Tilt X tolerance on surface (degrees) 1 ,L  
TSTX   1            -0.20000000     0.42678383    -0.11724851     0.20000000     0.42678383    -0.11724851 kT   
Change in Focus                :       0.000000                            0.000000 zATOFV  
Tilt Y tolerance on surface (degrees) 1 |}^u<S8X  
TSTY   1            -0.20000000     0.42678383    -0.11724851     0.20000000     0.42678383    -0.11724851 #SHJ0+)o  
Change in Focus                :       0.000000                            0.000000 bX[ZVE(L  
Decenter X tolerance on surface 2 7>i
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TSDX   2            -0.20000000     0.51705427    -0.02697807     0.20000000     0.51705427    -0.02697807 i<m) s$u  
Change in Focus                :       0.000000                            0.000000 q;R&valn  
Decenter Y tolerance on surface 2 b`%u}^B {  
TSDY   2            -0.20000000     0.51705427    -0.02697807     0.20000000     0.51705427    -0.02697807 'r=2f6G>cP  
Change in Focus                :       0.000000                            0.000000 Wk^{Tn/]  
Tilt X tolerance on surface (degrees) 2 {_W8Qm`.  
TSTX   2            -0.20000000     0.35349910    -0.19053324     0.20000000     0.35349910    -0.19053324 :!Z|_y{b  
Change in Focus                :       0.000000                            0.000000 fp
h+05.%  
Tilt Y tolerance on surface (degrees) 2 nv0D4 t  
TSTY   2            -0.20000000     0.35349910    -0.19053324     0.20000000     0.35349910    -0.19053324 O*+HK1q7  
Change in Focus                :       0.000000                            0.000000 % dFz[b  
Decenter X tolerance on surface 3 bkR~>F]FAu  
TSDX   3            -0.20000000     0.53419039    -0.00984195     0.20000000     0.53419039    -0.00984195 F%zMhX'AG  
Change in Focus                :       0.000000                            0.000000 ?$)a[UnqX  
Decenter Y tolerance on surface 3 kqX%y  
TSDY   3            -0.20000000     0.53419039    -0.00984195     0.20000000     0.53419039    -0.00984195 hc$m1lLn  
Change in Focus                :       0.000000                            0.000000 ga KZ4#  
Tilt X tolerance on surface (degrees) 3 Ax|'uvVAPT  
TSTX   3            -0.20000000     0.42861670    -0.11541563     0.20000000     0.42861670    -0.11541563 3;b)pQ~6CJ  
Change in Focus                :       0.000000                            0.000000 _3u3b/%J?  
Tilt Y tolerance on surface (degrees) 3 dVq9'{[3  
TSTY   3            -0.20000000     0.42861670    -0.11541563     0.20000000     0.42861670    -0.11541563 yS K81`  
Change in Focus                :       0.000000                            0.000000 ?.ObHV*k  
Irregularity of surface 1 in fringes `B&E?x  
TIRR   1            -0.20000000     0.50973587    -0.03429647     0.20000000     0.57333868     0.02930634 P$Yw'3v/  
Change in Focus                :       0.000000                            0.000000 >mCH!ey  
Irregularity of surface 2 in fringes |,KsJ2hD  
TIRR   2            -0.20000000     0.53400904    -0.01002330     0.20000000     0.55360281     0.00957047 0 -M i q  
Change in Focus                :       0.000000                            0.000000 b!MN QGs  
Irregularity of surface 3 in fringes 9pi{)PDJ  
TIRR   3            -0.20000000     0.58078982     0.03675748     0.20000000     0.49904394    -0.04498840 +
5-|6  
Change in Focus                :       0.000000                            0.000000 F~fN7<9R  
Index tolerance on surface 1 S_*Gv O  
TIND   1            -0.00100000     0.52606778    -0.01796456     0.00100000     0.56121811     0.01718578 _nzT
d\L88  
Change in Focus                :       0.000000                            0.000000 l'Li!u  
Index tolerance on surface 2 |0p@'X1  
TIND   2            -0.00100000     0.55639086     0.01235852     0.00100000     0.53126361    -0.01276872 ?$I9/r  
Change in Focus                :       0.000000                           -0.000000 w?3ww7yf`  
5m@'( ]j  
Worst offenders: ,d!@5d&Zi  
Type                      Value      Criterion        Change D0 q42+5  
TSTY   2            -0.20000000     0.35349910    -0.19053324 +p _?ekV\  
TSTY   2             0.20000000     0.35349910    -0.19053324 ORqqzy +  
TSTX   2            -0.20000000     0.35349910    -0.19053324 ]ZR` 6|"VO  
TSTX   2             0.20000000     0.35349910    -0.19053324 r1.zURY  
TSTY   1            -0.20000000     0.42678383    -0.11724851 v:!TqfI  
TSTY   1             0.20000000     0.42678383    -0.11724851 V]]!0ugvk(  
TSTX   1            -0.20000000     0.42678383    -0.11724851 Nz"K`C>/  
TSTX   1             0.20000000     0.42678383    -0.11724851 SG~HzQ\%  
TSTY   3            -0.20000000     0.42861670    -0.11541563 V"gKk$j7  
TSTY   3             0.20000000     0.42861670    -0.11541563 $M,Q"QL  
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Estimated Performance Changes based upon Root-Sum-Square method: q|klsup  
Nominal MTF                 :     0.54403234 L|D9+u L  
Estimated change            :    -0.36299231 F;/^5T3wI  
Estimated MTF               :     0.18104003 Wd+kjI\  
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Compensator Statistics: fhdqes])  
Change in back focus:
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Minimum            :        -0.000000 A3HNMz  
Maximum            :         0.000000 E>E^t=;[  
Mean               :        -0.000000 AL&<SxuP  
Standard Deviation :         0.000000 dA2@PKK  
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Monte Carlo Analysis: 2S:B%cj9m  
Number of trials: 20 G.N`  
3ohHBo  
Initial Statistics: Normal Distribution v9TIEmZ  
oFt_ yU-  
  Trial       Criterion        Change R:'&>.AUw  
      1     0.42804416    -0.11598818 _h,X3P  
Change in Focus                :      -0.400171 %y_pF?2@q  
      2     0.54384387    -0.00018847 xU{0rM"  
Change in Focus                :       1.018470 +|<bb8
%  
      3     0.44510003    -0.09893230 D;48VK/Q  
Change in Focus                :      -0.601922 >#;_Ebl@  
      4     0.18154684    -0.36248550 L*p7|rq$"  
Change in Focus                :       0.920681 zLxuxf~4@  
      5     0.28665820    -0.25737414 DHhty qm  
Change in Focus                :       1.253875 b9wC:NgQx  
      6     0.21263372    -0.33139862 iYdg1  
Change in Focus                :      -0.903878 1o
_Zw.  
      7     0.40051424    -0.14351809 z#n+iC$9  
Change in Focus                :      -1.354815  SN}3  
      8     0.48754161    -0.05649072 1n*"C!q  
Change in Focus                :       0.215922 5,O:"3>c  
      9     0.40357468    -0.14045766 K0@bh/i/^  
Change in Focus                :       0.281783 hp7ni1V  
     10     0.26315315    -0.28087919 "WPWMQ+  
Change in Focus                :      -1.048393 P3a]*>.,  
     11     0.26120585    -0.28282649 cF iTanu  
Change in Focus                :       1.017611 Dl\0xcE
  
     12     0.24033815    -0.30369419 >$3 =yw%  
Change in Focus                :      -0.109292 zT!.5qd  
     13     0.37164046    -0.17239188 ?}uvpB1}  
Change in Focus                :      -0.692430 *y+K{ fM1  
     14     0.48597489    -0.05805744 .345%j  
Change in Focus                :      -0.662040 J!Rq
m!)q  
     15     0.21462327    -0.32940907 d;3f80Kd*  
Change in Focus                :       1.611296
Q/HEWk  
     16     0.43378226    -0.11025008 l4I',79l  
Change in Focus                :      -0.640081 8@6*d.
+e  
     17     0.39321881    -0.15081353 8[ ZuVJ]  
Change in Focus                :       0.914906 C.}ho.} r  
     18     0.20692530    -0.33710703 !0Ak)Q]e'  
Change in Focus                :       0.801607 gA5DEit  
     19     0.51374068    -0.03029165 e-xT.RnQ  
Change in Focus                :       0.947293 O|9Nl*rXz  
     20     0.38013374    -0.16389860 )wEXCXr!  
Change in Focus                :       0.667010 ^g<Lu/5w  
Sl \EPKZD  
Number of traceable Monte Carlo files generated: 20 Tjj27+y*\  
l{kacfk#  
Nominal     0.54403234 b$*G&d5  
Best        0.54384387    Trial     2 G 8tK"LC  
Worst       0.18154684    Trial     4 >;s2V_d  
Mean        0.35770970 "`pg+t&  
Std Dev     0.11156454 sI#h&V,9  
?Qpi(Czbpq  

S!iDPl~  
Compensator Statistics: # M Y4Mr  
Change in back focus: 3m~3l d  
Minimum            :        -1.354815 ;>]dwsA*P  
Maximum            :         1.611296 [H2su|rBI`  
Mean               :         0.161872 &k(tDP  
Standard Deviation :         0.869664 y7z ,I  
1bCS4fs^>  
90% >       0.20977951               \x_$Pu
 
80% >       0.22748071               v=IcVHuf  
50% >       0.38667627               $7Tj<;TV  
20% >       0.46553746               Xs2B:`,hh  
10% >       0.50064115                K=P LOC5  
C+C1(b;1  
End of Run. EYZ,GT-I  
B+'w'e$6  
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 xfqu=z8X  

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 Y~OyoNu2  
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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                 A)TO<dl  
80% >       0.22748071                 (/J %Huy  
50% >       0.38667627                 7+J<N@.d  
20% >       0.46553746                 .@f)#2  
10% >       0.50064115 J2$=H1-  
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最后这个数值是MTF值呢，还是MTF的公差？ rK cr1VFy  
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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？？？   8
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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  : u:O6MO9^  
90% >       0.20977951                 ~qmu?5  
80% >       0.22748071                 v_ W03\  
50% >       0.38667627                 rlVo}kc7:  
20% >       0.46553746                 ^Dhu8C(  
10% >       0.50064115 e.^Y4(  
....... 'l3K*lck  

wPU<jAQyp  
wa4(tM2  
这些数值都是MTF值

Criterion           : Geometric MTF average S&T at 30.0000 cycles per mm   NQ(}rr'.  
Mode                : Sensitivities S4Vv _k-&  
Sampling            : 2 zx{O/v KG  
Nominal Criterion   : 0.54403234 \dag~b<  
Test Wavelength     : 0.6328 {1ic*cZS  
35[8XD  
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？ lAwOp  
vK\;CSk  
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