[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 #uvJH8)D  
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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 uH{'gd,q8  
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图片:2.jpg

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然后运行分析的结果如下： ;sQbn|=e"  
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Analysis of Tolerances _/x&<,3  
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File : E:\光学设计资料\zemax练习\f500.ZMX t
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Title: Wc4vCVw  
Date : TUE JUN 21 2011 avNLV  
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Units are Millimeters. esq<xuZM4  
All changes are computed using linear differences. #x)}29%e#  
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Paraxial Focus compensation only. UxqWnHH.`  
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WARNING: Solves should be removed prior to tolerancing. -u6#-}S
  
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Mnemonics: g [L  
TFRN: Tolerance on curvature in fringes. r*d Q5 _  
TTHI: Tolerance on thickness. [m#NfA:h,  
TSDX: Tolerance on surface decentering in x. xZ ;bMxZ  
TSDY: Tolerance on surface decentering in y. ntHT  
TSTX: Tolerance on surface tilt in x (degrees). H@W0gK(cS;  
TSTY: Tolerance on surface tilt in y (degrees). 6VR[)T%  
TIRR: Tolerance on irregularity (fringes). n7iE8SK|k  
TIND: Tolerance on Nd index of refraction. &o.iUk  
TEDX: Tolerance on element decentering in x. -Bv12ymLG  
TEDY: Tolerance on element decentering in y. d]7*mzw^j  
TETX: Tolerance on element tilt in x (degrees). mxL;;-  
TETY: Tolerance on element tilt in y (degrees). 0xP:9rm  
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WARNING: RAY AIMING IS OFF. Very loose tolerances may not be computed accurately. DTy/jaK  
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WARNING: Boundary constraints on compensators will be ignored. }tR'Hz2  
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Criterion           : Geometric MTF average S&T at 30.0000 cycles per mm d}% (jJ(I  
Mode                : Sensitivities ptR  
Sampling            : 2 {3 o%d:  
Nominal Criterion   : 0.54403234 IwRQL%  
Test Wavelength     : 0.6328 <.$,`m,  
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6Ct0hk4  
Fields: XY Symmetric Angle in degrees %UG/ak%
z  
#      X-Field      Y-Field       Weight    VDX    VDY    VCX    VCY ZR mPP  
1   0.000E+000   0.000E+000   1.000E+000  0.000  0.000  0.000  0.000 ..$>7y}  
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Sensitivity Analysis: !E0fGh  
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                 |----------------- Minimum ----------------| |----------------- Maximum ----------------| x!+Z{x  
Type                      Value      Criterion        Change          Value      Criterion        Change Wa, 7P2
r  
Fringe tolerance on surface 1 pn*d[M|k  
TFRN   1            -1.00000000     0.54257256    -0.00145977     1.00000000     0.54548607     0.00145374 _LsYMUe  
Change in Focus                :      -0.000000                            0.000000 6o(lObfo  
Fringe tolerance on surface 2 D;C5,rNt  
TFRN   2            -1.00000000     0.54177471    -0.00225762     1.00000000     0.54627463     0.00224230 D(@SnI+  
Change in Focus                :       0.000000                            0.000000 6vWii)O.D  
Fringe tolerance on surface 3 \7DCwu[0M  
TFRN   3            -1.00000000     0.54779866     0.00376632     1.00000000     0.54022572    -0.00380662 Rk{$S"8S_  
Change in Focus                :      -0.000000                            0.000000 kaC+I"4c  
Thickness tolerance on surface 1 )|:8zDuJ  
TTHI   1   3        -0.20000000     0.54321462    -0.00081772     0.20000000     0.54484759     0.00081525 ck~ '`<7  
Change in Focus                :       0.000000                            0.000000 ir+8:./6  
Thickness tolerance on surface 2 Bxt_a.LthH  
TTHI   2   3        -0.20000000     0.54478712     0.00075478     0.20000000     0.54327558    -0.00075675 Di])<V  
Change in Focus                :       0.000000                           -0.000000 )u Qvt-  
Decenter X tolerance on surfaces 1 through 3 >vxWx[fRu  
TEDX   1   3        -0.20000000     0.54401464   -1.7700E-005     0.20000000     0.54401464   -1.7700E-005 1O4D+0@  
Change in Focus                :       0.000000                            0.000000 &m4f1ZO*  
Decenter Y tolerance on surfaces 1 through 3 o{g@Nk'f  
TEDY   1   3        -0.20000000     0.54401464   -1.7700E-005     0.20000000     0.54401464   -1.7700E-005 8E=vR 8  
Change in Focus                :       0.000000                            0.000000 ,i;9[4QMX  
Tilt X tolerance on surfaces 1 through 3 (degrees) R/rcXX7%  
TETX   1   3        -0.20000000     0.54897548     0.00494314     0.20000000     0.54897548     0.00494314 *V<)p%l.  
Change in Focus                :       0.000000                            0.000000 <L%HG  
Tilt Y tolerance on surfaces 1 through 3 (degrees) x' ?.~  
TETY   1   3        -0.20000000     0.54897548     0.00494314     0.20000000     0.54897548     0.00494314 /t5g"n3  
Change in Focus                :       0.000000                            0.000000 J]\s*,C&  
Decenter X tolerance on surface 1 IY~ {)X  
TSDX   1            -0.20000000     0.53999563    -0.00403671     0.20000000     0.53999563    -0.00403671 aYR\<02  
Change in Focus                :       0.000000                            0.000000 hsz$S:am  
Decenter Y tolerance on surface 1 ID+,[TM`  
TSDY   1            -0.20000000     0.53999563    -0.00403671     0.20000000     0.53999563    -0.00403671 JkJhfFV  
Change in Focus                :       0.000000                            0.000000 VAt>ji7c  
Tilt X tolerance on surface (degrees) 1 dkETM,
 
TSTX   1            -0.20000000     0.42678383    -0.11724851     0.20000000     0.42678383    -0.11724851 g\qX7nIH?  
Change in Focus                :       0.000000                            0.000000 XWc|[>iO  
Tilt Y tolerance on surface (degrees) 1 R rxRa[{Z  
TSTY   1            -0.20000000     0.42678383    -0.11724851     0.20000000     0.42678383    -0.11724851 }il%AAI9}r  
Change in Focus                :       0.000000                            0.000000 /LSq%~UF  
Decenter X tolerance on surface 2 XCV0.u|  
TSDX   2            -0.20000000     0.51705427    -0.02697807     0.20000000     0.51705427    -0.02697807 L#[HnsLp_  
Change in Focus                :       0.000000                            0.000000 65uZLsQ  
Decenter Y tolerance on surface 2 01-p `H+  
TSDY   2            -0.20000000     0.51705427    -0.02697807     0.20000000     0.51705427    -0.02697807 )'w]YIv9  
Change in Focus                :       0.000000                            0.000000 @H3|u`6V  
Tilt X tolerance on surface (degrees) 2 2,+@#q  
TSTX   2            -0.20000000     0.35349910    -0.19053324     0.20000000     0.35349910    -0.19053324 .5Q5\qc=  
Change in Focus                :       0.000000                            0.000000 7/4~>D&-b  
Tilt Y tolerance on surface (degrees) 2 %odw+PhO  
TSTY   2            -0.20000000     0.35349910    -0.19053324     0.20000000     0.35349910    -0.19053324 l#mtND3  
Change in Focus                :       0.000000                            0.000000 vW9^hbdx  
Decenter X tolerance on surface 3 $`ON!,oa  
TSDX   3            -0.20000000     0.53419039    -0.00984195     0.20000000     0.53419039    -0.00984195 RLv&,$$0  
Change in Focus                :       0.000000                            0.000000
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Decenter Y tolerance on surface 3 1o(+rR<h9  
TSDY   3            -0.20000000     0.53419039    -0.00984195     0.20000000     0.53419039    -0.00984195 |_!PD$i-  
Change in Focus                :       0.000000                            0.000000 `Nkx7Z~w:  
Tilt X tolerance on surface (degrees) 3 nIG[{gGX  
TSTX   3            -0.20000000     0.42861670    -0.11541563     0.20000000     0.42861670    -0.11541563 `Uu^I   
Change in Focus                :       0.000000                            0.000000 _Wq7U1v
`  
Tilt Y tolerance on surface (degrees) 3 HE9. k.sS  
TSTY   3            -0.20000000     0.42861670    -0.11541563     0.20000000     0.42861670    -0.11541563 -v;iMEZ)  
Change in Focus                :       0.000000                            0.000000 9tW3!O^_  
Irregularity of surface 1 in fringes 1a \=0=[  
TIRR   1            -0.20000000     0.50973587    -0.03429647     0.20000000     0.57333868     0.02930634 Pxap;;\  
Change in Focus                :       0.000000                            0.000000 o@Dk%LxP  
Irregularity of surface 2 in fringes F>p%2II/  
TIRR   2            -0.20000000     0.53400904    -0.01002330     0.20000000     0.55360281     0.00957047 AsV8k_qZL  
Change in Focus                :       0.000000                            0.000000 <?{ SU   
Irregularity of surface 3 in fringes B[C7G7<B  
TIRR   3            -0.20000000     0.58078982     0.03675748     0.20000000     0.49904394    -0.04498840 0m qSA  
Change in Focus                :       0.000000                            0.000000 9 Wxq)  
Index tolerance on surface 1 4mki&\lw`  
TIND   1            -0.00100000     0.52606778    -0.01796456     0.00100000     0.56121811     0.01718578 AviT+^7E  
Change in Focus                :       0.000000                            0.000000 .n?5}s+q  
Index tolerance on surface 2 ^Z#<tN;  
TIND   2            -0.00100000     0.55639086     0.01235852     0.00100000     0.53126361    -0.01276872 SZN
FE  
Change in Focus                :       0.000000                           -0.000000 3 t~X:  
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Worst offenders: s9^"wN YQ  
Type                      Value      Criterion        Change T[`QO`\5O  
TSTY   2            -0.20000000     0.35349910    -0.19053324 0;.e#(`-  
TSTY   2             0.20000000     0.35349910    -0.19053324 aMe%#cLI  
TSTX   2            -0.20000000     0.35349910    -0.19053324 PGC07U:B  
TSTX   2             0.20000000     0.35349910    -0.19053324 Yk(NZ3O  
TSTY   1            -0.20000000     0.42678383    -0.11724851 K+(
m'3`  
TSTY   1             0.20000000     0.42678383    -0.11724851 y}s 0J K  
TSTX   1            -0.20000000     0.42678383    -0.11724851 :==UDVP  
TSTX   1             0.20000000     0.42678383    -0.11724851 fo/((
)  
TSTY   3            -0.20000000     0.42861670    -0.11541563 Lqy|DJ%  
TSTY   3             0.20000000     0.42861670    -0.11541563 ={e#lC  
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Estimated Performance Changes based upon Root-Sum-Square method: o
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Nominal MTF                 :     0.54403234 1"87EP   
Estimated change            :    -0.36299231 P#M<CG9  
Estimated MTF               :     0.18104003 ,i1fv "  
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Compensator Statistics: -Hl\j(D7  
Change in back focus: ?etj.\q6  
Minimum            :        -0.000000 Iwd"f  
Maximum            :         0.000000 B{=,VwaP_  
Mean               :        -0.000000 0O@[on;Bd  
Standard Deviation :         0.000000 f?oI'5R41  
+ xkMW%e<  
Monte Carlo Analysis: G5C#i7cpm  
Number of trials: 20 4jI*Y6Wkz  
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Initial Statistics: Normal Distribution sZ\i(eIU  
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  Trial       Criterion        Change >QbI)if`1  
      1     0.42804416    -0.11598818 zXA= se0U  
Change in Focus                :      -0.400171 2l;ge>DJ  
      2     0.54384387    -0.00018847 QZeb+r  
Change in Focus                :       1.018470 &QHA_+88W  
      3     0.44510003    -0.09893230 IrVM|8vT3  
Change in Focus                :      -0.601922 vErbX3RY2  
      4     0.18154684    -0.36248550 _ ;v_L  
Change in Focus                :       0.920681 -F~9f>  
      5     0.28665820    -0.25737414 mAtG&my)  
Change in Focus                :       1.253875 0.3[=a43  
      6     0.21263372    -0.33139862 ** "s~  
Change in Focus                :      -0.903878 60SenHKles  
      7     0.40051424    -0.14351809 -b
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Change in Focus                :      -1.354815 0o\=0bH&s  
      8     0.48754161    -0.05649072 xfZ9&g  
Change in Focus                :       0.215922 Wl^/=I4p#  
      9     0.40357468    -0.14045766 p5D3J[?N  
Change in Focus                :       0.281783 %E=,H?9&>  
     10     0.26315315    -0.28087919 lqwJ F &  
Change in Focus                :      -1.048393 2R~=@  
     11     0.26120585    -0.28282649 !3gpiQH{  
Change in Focus                :       1.017611 ui:>eYv  
     12     0.24033815    -0.30369419 R _~m\P  
Change in Focus                :      -0.109292 +RKE|*y  
     13     0.37164046    -0.17239188 #6#BSZ E  
Change in Focus                :      -0.692430 Qc)RrqYNGF  
     14     0.48597489    -0.05805744 1Rb<(%   
Change in Focus                :      -0.662040 =Am*$wGI  
     15     0.21462327    -0.32940907 )r-|T&Sn  
Change in Focus                :       1.611296 5<>R dLo  
     16     0.43378226    -0.11025008 88X*:Kf?:  
Change in Focus                :      -0.640081 qhHRR/p  
     17     0.39321881    -0.15081353 B[k+#YYY  
Change in Focus                :       0.914906 &bRxy`ZH  
     18     0.20692530    -0.33710703 _yXeX  
Change in Focus                :       0.801607 vo^9qSX f  
     19     0.51374068    -0.03029165 ^?l-YnQqm?  
Change in Focus                :       0.947293 ;Bc<u[G  
     20     0.38013374    -0.16389860 :j50]zLy{  
Change in Focus                :       0.667010 Z~.]ZWj-  
QK/+*hr;  
Number of traceable Monte Carlo files generated: 20 %v6]>FNP'3  
WSX@0A.&)  
Nominal     0.54403234 F<'l'AsC-  
Best        0.54384387    Trial     2 3qd-,qC  
Worst       0.18154684    Trial     4 >ehWjL`8  
Mean        0.35770970 @):NNbtA  
Std Dev     0.11156454 M`,Z#)Af  
. I9] `Q  
=xQfgj  
Compensator Statistics: )@&?i.  
Change in back focus: ]> "/<"  
Minimum            :        -1.354815 s%?p%2&RA  
Maximum            :         1.611296 n
fPl#]ef*  
Mean               :         0.161872 f4;8?  
Standard Deviation :         0.869664 OgpH{"  
yqc(32rF!  
90% >       0.20977951               i)^ZH#Gp  
80% >       0.22748071               x~Esu}x7  
50% >       0.38667627               ~{tZ;YZ  
20% >       0.46553746               ="nrq&2  
10% >       0.50064115                d+| !6  
SbNUX  
End of Run. )|1JcnNSa  
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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 o_^d>Klb8  

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 )jZ=/xG  
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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                 T@WMT,J6j  
80% >       0.22748071                 Z|GkM5QH:  
50% >       0.38667627                 j7 3@Yi%  
20% >       0.46553746                 P&^7wud-sb  
10% >       0.50064115 #E@i@'T  
(`Mz.VN  
最后这个数值是MTF值呢，还是MTF的公差？ A)\DPLAG  
Bx!` UdRn  
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？？？   ~,1q :Kue  
%$KO]   
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  : 8l0 (6x$  
90% >       0.20977951                 a6P.Zf7  
80% >       0.22748071                 3kY4V*9@-  
50% >       0.38667627                 -~f.>@Wb  
20% >       0.46553746                 Ghc0{M<  
10% >       0.50064115 R2W_/fsG  
....... p>S/6 [X  

,eCXT=6  
t7FQ.E,T  
这些数值都是MTF值

Criterion           : Geometric MTF average S&T at 30.0000 cycles per mm   ;bE6Y]"Rz  
Mode                : Sensitivities G9Tix\SpF  
Sampling            : 2 #jiqRhm  
Nominal Criterion   : 0.54403234 )A=g# D#  
Test Wavelength     : 0.6328 +9CUnRv  
q(^J7M)  
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？ uf]$@6)  
pUGfm  
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