[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 P_M!h~  
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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 AHLXmQl  
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图片:2.jpg

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然后运行分析的结果如下： s18A  
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Analysis of Tolerances et`rPK~m  
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File : E:\光学设计资料\zemax练习\f500.ZMX ~&+8m=   
Title: uHyc7^X>  
Date : TUE JUN 21 2011 H(Ad"1~.#  
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Units are Millimeters. \}7xgQ>oV  
All changes are computed using linear differences. Vc "+|^  
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Paraxial Focus compensation only. L>,xG.oG  
:tLMh08h  
WARNING: Solves should be removed prior to tolerancing. ;-kg3fGB1Q  
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Mnemonics: h ?+vH{}j  
TFRN: Tolerance on curvature in fringes. <&}N[  
TTHI: Tolerance on thickness. qWI8 >my11  
TSDX: Tolerance on surface decentering in x. r5uX?^mJ0  
TSDY: Tolerance on surface decentering in y. +<c(;Ucl?  
TSTX: Tolerance on surface tilt in x (degrees). IHe?/oUL"b  
TSTY: Tolerance on surface tilt in y (degrees). iMp_1EXe  
TIRR: Tolerance on irregularity (fringes). <*djtO  
TIND: Tolerance on Nd index of refraction. *0%G`Q  
TEDX: Tolerance on element decentering in x. 'zYx4&s  
TEDY: Tolerance on element decentering in y. Qh4Z{c@  
TETX: Tolerance on element tilt in x (degrees). QeD ;GzG  
TETY: Tolerance on element tilt in y (degrees). N1'$;9 c  
e:=+~F(f  
WARNING: RAY AIMING IS OFF. Very loose tolerances may not be computed accurately. Rhh.fV3  
:z+l=d:4  
WARNING: Boundary constraints on compensators will be ignored. (EOYJHZB!  
q]m$%>  
Criterion           : Geometric MTF average S&T at 30.0000 cycles per mm  lmB+S  
Mode                : Sensitivities x]|-2t  
Sampling            : 2 @86I|cY  
Nominal Criterion   : 0.54403234 5<|X++y}8)  
Test Wavelength     : 0.6328 ~ 6Hi"
w  
DgC;1U'  
\v([,tiW%  
Fields: XY Symmetric Angle in degrees ~a.ei^r  
#      X-Field      Y-Field       Weight    VDX    VDY    VCX    VCY rNX]tp{j  
1   0.000E+000   0.000E+000   1.000E+000  0.000  0.000  0.000  0.000 )dI `yf  
XE :JL_  
Sensitivity Analysis: 9AZpvQ  
!a9/8U_>XF  
                 |----------------- Minimum ----------------| |----------------- Maximum ----------------| GhY MO6Q4  
Type                      Value      Criterion        Change          Value      Criterion        Change =7<g;u  
Fringe tolerance on surface 1 YRJw,xl  
TFRN   1            -1.00000000     0.54257256    -0.00145977     1.00000000     0.54548607     0.00145374 s;YuB#Z  
Change in Focus                :      -0.000000                            0.000000 lNqF@eCT9  
Fringe tolerance on surface 2 LT)G"U~  
TFRN   2            -1.00000000     0.54177471    -0.00225762     1.00000000     0.54627463     0.00224230 66Xo3o  
Change in Focus                :       0.000000                            0.000000 $jv/00:&  
Fringe tolerance on surface 3 Cb;49;q  
TFRN   3            -1.00000000     0.54779866     0.00376632     1.00000000     0.54022572    -0.00380662 1WLaJ%Fv  
Change in Focus                :      -0.000000                            0.000000 N(L?F):fT  
Thickness tolerance on surface 1 33b 3v\N  
TTHI   1   3        -0.20000000     0.54321462    -0.00081772     0.20000000     0.54484759     0.00081525 VAZ6;3@cd  
Change in Focus                :       0.000000                            0.000000 $rmfE  
Thickness tolerance on surface 2 ]jwF[D  
TTHI   2   3        -0.20000000     0.54478712     0.00075478     0.20000000     0.54327558    -0.00075675 PkxhR;4  
Change in Focus                :       0.000000                           -0.000000 "9yQDS:  
Decenter X tolerance on surfaces 1 through 3 _0qp!-l}  
TEDX   1   3        -0.20000000     0.54401464   -1.7700E-005     0.20000000     0.54401464   -1.7700E-005 i@STo7=  
Change in Focus                :       0.000000                            0.000000 l*<RKY8  
Decenter Y tolerance on surfaces 1 through 3 Fs;_z9ej-u  
TEDY   1   3        -0.20000000     0.54401464   -1.7700E-005     0.20000000     0.54401464   -1.7700E-005 OqA#4h4^  
Change in Focus                :       0.000000                            0.000000 ;Fm7!@u^0  
Tilt X tolerance on surfaces 1 through 3 (degrees) e'1}5Ky  
TETX   1   3        -0.20000000     0.54897548     0.00494314     0.20000000     0.54897548     0.00494314 %P-z3 0FHp  
Change in Focus                :       0.000000                            0.000000 by0M(h  
Tilt Y tolerance on surfaces 1 through 3 (degrees) 0?8{q{ o+  
TETY   1   3        -0.20000000     0.54897548     0.00494314     0.20000000     0.54897548     0.00494314 eh}{\P  
Change in Focus                :       0.000000                            0.000000 t5jZ8&M5]  
Decenter X tolerance on surface 1 8K0@*0  
TSDX   1            -0.20000000     0.53999563    -0.00403671     0.20000000     0.53999563    -0.00403671 0|@*`-:VO  
Change in Focus                :       0.000000                            0.000000 K,L  
Decenter Y tolerance on surface 1 N?krlR  
TSDY   1            -0.20000000     0.53999563    -0.00403671     0.20000000     0.53999563    -0.00403671 x9VR>ux&  
Change in Focus                :       0.000000                            0.000000 ^K n{L  
Tilt X tolerance on surface (degrees) 1 %oqC5O6  
TSTX   1            -0.20000000     0.42678383    -0.11724851     0.20000000     0.42678383    -0.11724851  w#\*{EN  
Change in Focus                :       0.000000                            0.000000 khtYn.eaL  
Tilt Y tolerance on surface (degrees) 1 ([L5i&DT  
TSTY   1            -0.20000000     0.42678383    -0.11724851     0.20000000     0.42678383    -0.11724851 \-~TW4dYe  
Change in Focus                :       0.000000                            0.000000 &Ew{{t;"  
Decenter X tolerance on surface 2 7Q3a0`
Iq  
TSDX   2            -0.20000000     0.51705427    -0.02697807     0.20000000     0.51705427    -0.02697807 V50FX}i  
Change in Focus                :       0.000000                            0.000000 !`?*zf  
Decenter Y tolerance on surface 2 kA%"-$3  
TSDY   2            -0.20000000     0.51705427    -0.02697807     0.20000000     0.51705427    -0.02697807 HCTjFW>C  
Change in Focus                :       0.000000                            0.000000 86N"EuH$  
Tilt X tolerance on surface (degrees) 2 COk;z.Kn  
TSTX   2            -0.20000000     0.35349910    -0.19053324     0.20000000     0.35349910    -0.19053324 |]8Hh>  
Change in Focus                :       0.000000                            0.000000 ]S#m o  
Tilt Y tolerance on surface (degrees) 2 4` zfrT^  
TSTY   2            -0.20000000     0.35349910    -0.19053324     0.20000000     0.35349910    -0.19053324 UuvI?D  
Change in Focus                :       0.000000                            0.000000 Km9Y_`?  
Decenter X tolerance on surface 3 Y>i?nC%*  
TSDX   3            -0.20000000     0.53419039    -0.00984195     0.20000000     0.53419039    -0.00984195 }D>nXh
O&  
Change in Focus                :       0.000000                            0.000000 `cBV+00YS  
Decenter Y tolerance on surface 3 &?mJL0fy  
TSDY   3            -0.20000000     0.53419039    -0.00984195     0.20000000     0.53419039    -0.00984195 vkQkU,q  
Change in Focus                :       0.000000                            0.000000 ;.4A,7w#  
Tilt X tolerance on surface (degrees) 3 b
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TSTX   3            -0.20000000     0.42861670    -0.11541563     0.20000000     0.42861670    -0.11541563 '8b/TL  
Change in Focus                :       0.000000                            0.000000 pk0Cx  
Tilt Y tolerance on surface (degrees) 3 1hn4YcHb  
TSTY   3            -0.20000000     0.42861670    -0.11541563     0.20000000     0.42861670    -0.11541563 "=97:H{!  
Change in Focus                :       0.000000                            0.000000 PtT=HvP!k  
Irregularity of surface 1 in fringes Vx6/Rehj  
TIRR   1            -0.20000000     0.50973587    -0.03429647     0.20000000     0.57333868     0.02930634 nR1QS_@{L  
Change in Focus                :       0.000000                            0.000000 1IRlFC  
Irregularity of surface 2 in fringes (d2|r)O  
TIRR   2            -0.20000000     0.53400904    -0.01002330     0.20000000     0.55360281     0.00957047 >u:t2DxE  
Change in Focus                :       0.000000                            0.000000 s]z-d!G  
Irregularity of surface 3 in fringes )|?s!rw +  
TIRR   3            -0.20000000     0.58078982     0.03675748     0.20000000     0.49904394    -0.04498840  DlWnz-  
Change in Focus                :       0.000000                            0.000000 }+fMYgw  
Index tolerance on surface 1 8~>5k  
TIND   1            -0.00100000     0.52606778    -0.01796456     0.00100000     0.56121811     0.01718578 l].Gz`L
 
Change in Focus                :       0.000000                            0.000000 L| uoFG{  
Index tolerance on surface 2 NY`$D}Bi  
TIND   2            -0.00100000     0.55639086     0.01235852     0.00100000     0.53126361    -0.01276872 :"4Pr/}rT  
Change in Focus                :       0.000000                           -0.000000 5}uH;E)4  
wtY*{m2  
Worst offenders: 8- U1Y  
Type                      Value      Criterion        Change "X }@VT=  
TSTY   2            -0.20000000     0.35349910    -0.19053324 4G4[IAu_  
TSTY   2             0.20000000     0.35349910    -0.19053324 feH|sz`e  
TSTX   2            -0.20000000     0.35349910    -0.19053324 t<|S7EqIL  
TSTX   2             0.20000000     0.35349910    -0.19053324 )d\u_m W^  
TSTY   1            -0.20000000     0.42678383    -0.11724851 DFKumw>!  
TSTY   1             0.20000000     0.42678383    -0.11724851 g5 J[ut  
TSTX   1            -0.20000000     0.42678383    -0.11724851 i]@QxzCSF  
TSTX   1             0.20000000     0.42678383    -0.11724851 ymxYE#q  
TSTY   3            -0.20000000     0.42861670    -0.11541563 [8o!X)  
TSTY   3             0.20000000     0.42861670    -0.11541563 ?/@~d  
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Estimated Performance Changes based upon Root-Sum-Square method: lStYfO:<'v  
Nominal MTF                 :     0.54403234 "XEKoeG{  
Estimated change            :    -0.36299231 `T gwa  
Estimated MTF               :     0.18104003 w,t>M_(N  
Sf2pU!5n^  
Compensator Statistics: <{"]&bl  
Change in back focus: ;gC.fpu  
Minimum            :        -0.000000 RiY9[ec2  
Maximum            :         0.000000 9,4Lb]  
Mean               :        -0.000000 Sj$XRkbj:  
Standard Deviation :         0.000000 8d90B9  
FM)Es&p&  
Monte Carlo Analysis: wap@q6fz<  
Number of trials: 20 &3Q!'pJJ  
[=63xPxs.  
Initial Statistics: Normal Distribution S|{'.XG  
}CiB+  
  Trial       Criterion        Change /WlpRf%  
      1     0.42804416    -0.11598818 0 s
-IW  
Change in Focus                :      -0.400171 @o[C Xrz  
      2     0.54384387    -0.00018847 @C]
Q;>^|  
Change in Focus                :       1.018470 t_-1sWeA!  
      3     0.44510003    -0.09893230 L@"1d.k_  
Change in Focus                :      -0.601922 Yy$GfjJtL]  
      4     0.18154684    -0.36248550 TfD]`v`]   
Change in Focus                :       0.920681 ;<JyA3i^V,  
      5     0.28665820    -0.25737414 p@H3NX  
Change in Focus                :       1.253875 b>B.3E\Pc  
      6     0.21263372    -0.33139862 ^=H. .pr  
Change in Focus                :      -0.903878 ~JJuM  
      7     0.40051424    -0.14351809 |hp_<F9.  
Change in Focus                :      -1.354815 kIb)I(n  
      8     0.48754161    -0.05649072 \a|FhhI  
Change in Focus                :       0.215922 h@5mVTb}i  
      9     0.40357468    -0.14045766 = h _>OA  
Change in Focus                :       0.281783 j{i3lGaN  
     10     0.26315315    -0.28087919 .#M'  
Change in Focus                :      -1.048393 MT8BP)C  
     11     0.26120585    -0.28282649 I.f)rMl+h  
Change in Focus                :       1.017611 z$VA]tI(  
     12     0.24033815    -0.30369419 Q -!,yCu  
Change in Focus                :      -0.109292 hP=^JH  
     13     0.37164046    -0.17239188 :|s!_G<  
Change in Focus                :      -0.692430 w"Q6'/P  
     14     0.48597489    -0.05805744 D;pfogK @  
Change in Focus                :      -0.662040 ^^u{W|'CaH  
     15     0.21462327    -0.32940907 -'j_JJ  
Change in Focus                :       1.611296 :N\j@yJK  
     16     0.43378226    -0.11025008 woctnT%"Q/  
Change in Focus                :      -0.640081 'l%b5:  
     17     0.39321881    -0.15081353 7X h'VOljB  
Change in Focus                :       0.914906 x<m{B@3T  
     18     0.20692530    -0.33710703 gEVN;G'B<=  
Change in Focus                :       0.801607 }tvLe3O  
     19     0.51374068    -0.03029165 }
klET   
Change in Focus                :       0.947293 i@=0fHiZQ  
     20     0.38013374    -0.16389860 bbDl?m&bq  
Change in Focus                :       0.667010 *o}LI6_u  
W6_~.m"b  
Number of traceable Monte Carlo files generated: 20 z|w@eQ",  
1Na*7|  
Nominal     0.54403234 Y:GSjq  
Best        0.54384387    Trial     2 2S~cW./#fX  
Worst       0.18154684    Trial     4 qq%\  
Mean        0.35770970 FKTdQg|NZ  
Std Dev     0.11156454 N$8do?  
uSeRn@  
SLzxFuV  
Compensator Statistics: ?#OGH`ZvkI  
Change in back focus: 6qW/Td|g  
Minimum            :        -1.354815 ?;s}GpEY:  
Maximum            :         1.611296 K%Dksx7ow  
Mean               :         0.161872 wT;3>%Mtr  
Standard Deviation :         0.869664 N7S?m@  
[0M2`x4`  
90% >       0.20977951               ,G";ny[$  
80% >       0.22748071               cs'ylGH  
50% >       0.38667627               ' }G!D  
20% >       0.46553746               "pP
5;*^f  
10% >       0.50064115                NQ7j{dJ?  
aR3R,6ec  
End of Run. dKs^Dq  
<M(Jqb cWa  
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 2~:jg1  

图片:3.JPG

ikr|P&e#u  
dQ&S&SW  
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 c4]/{!4 Q  
O}4(v#  
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                 "qE
i$a&]  
80% >       0.22748071                 /:]`TlAb,  
50% >       0.38667627                 ;DMv?-H  
20% >       0.46553746                 |aH;@V  
10% >       0.50064115 _%g}d/v}pO  
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最后这个数值是MTF值呢，还是MTF的公差？ `;[j`v8O  
y`"~zq0D  
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[mo PD5  
8&15kA  
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  : !:Lb^C;/  
90% >       0.20977951                 jd;=5(2  
80% >       0.22748071                 4;;F(yk8  
50% >       0.38667627                 YQ>P{I%J  
20% >       0.46553746                 6[BQx)7T  
10% >       0.50064115 9wLV\>i  
....... bK `'zi  

p#}38`  
\m!swYy  
这些数值都是MTF值

Criterion           : Geometric MTF average S&T at 30.0000 cycles per mm   w5"C<5^  
Mode                : Sensitivities 2BOe,giy  
Sampling            : 2 Z(AI]wk3<  
Nominal Criterion   : 0.54403234 ADRjCk}I
 
Test Wavelength     : 0.6328 -A}*Aa'\  
~o`I[-g)  
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？ bL5z%bV  
Ee>P*7*jB  
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