[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 M2@;RZ(|  
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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 y=aV=qD  
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图片:2.jpg

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然后运行分析的结果如下： !aNh!  
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Analysis of Tolerances 8TWTbQ  
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File : E:\光学设计资料\zemax练习\f500.ZMX _xrwu;o0}  
Title: U)D[]BVg  
Date : TUE JUN 21 2011 A:# k  
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Units are Millimeters. )TJS4?  
All changes are computed using linear differences. Rc[0aj:  
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Paraxial Focus compensation only. 2.lgT|p  
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WARNING: Solves should be removed prior to tolerancing. }Hcx=}j  
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Mnemonics: v]"L]/"  
TFRN: Tolerance on curvature in fringes. k<j"~S1  
TTHI: Tolerance on thickness. |<qs  
TSDX: Tolerance on surface decentering in x. 6bO~/mpWT~  
TSDY: Tolerance on surface decentering in y. x_MJJ(q8g  
TSTX: Tolerance on surface tilt in x (degrees). Ev9>@~^  
TSTY: Tolerance on surface tilt in y (degrees). A??@AP[7M  
TIRR: Tolerance on irregularity (fringes). 3 hKBc0  
TIND: Tolerance on Nd index of refraction. K@u&(}  
TEDX: Tolerance on element decentering in x. .Zmp,  
TEDY: Tolerance on element decentering in y. ,Zf 9RM  
TETX: Tolerance on element tilt in x (degrees). ..W-76{  
TETY: Tolerance on element tilt in y (degrees). aP-<4u
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Sq2P-y!w  
WARNING: RAY AIMING IS OFF. Very loose tolerances may not be computed accurately. FjFMR 63  
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WARNING: Boundary constraints on compensators will be ignored. 3Q By\1h.  
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Criterion           : Geometric MTF average S&T at 30.0000 cycles per mm #{J,kcxS  
Mode                : Sensitivities qu|i;WZE  
Sampling            : 2 DcD{*t?x  
Nominal Criterion   : 0.54403234 e Y$qV}  
Test Wavelength     : 0.6328 h9s >LY  
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Fields: XY Symmetric Angle in degrees (bp9Pjw  
#      X-Field      Y-Field       Weight    VDX    VDY    VCX    VCY ,&^3Z  
1   0.000E+000   0.000E+000   1.000E+000  0.000  0.000  0.000  0.000 39i
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MGpt}|t-  
Sensitivity Analysis: jXg  
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                 |----------------- Minimum ----------------| |----------------- Maximum ----------------| b1#dz]  
Type                      Value      Criterion        Change          Value      Criterion        Change XMIbUbUk-  
Fringe tolerance on surface 1 'jg3  
TFRN   1            -1.00000000     0.54257256    -0.00145977     1.00000000     0.54548607     0.00145374 v`PY>c6~  
Change in Focus                :      -0.000000                            0.000000 Me5{_n  
Fringe tolerance on surface 2 K=::)/{P  
TFRN   2            -1.00000000     0.54177471    -0.00225762     1.00000000     0.54627463     0.00224230 AyKMhac  
Change in Focus                :       0.000000                            0.000000 uQ1@b-e`5  
Fringe tolerance on surface 3 &53]sFZ  
TFRN   3            -1.00000000     0.54779866     0.00376632     1.00000000     0.54022572    -0.00380662 <O<LYN+(  
Change in Focus                :      -0.000000                            0.000000 u+m,b76  
Thickness tolerance on surface 1 fxcc<h4  
TTHI   1   3        -0.20000000     0.54321462    -0.00081772     0.20000000     0.54484759     0.00081525 4,Ic}CvM  
Change in Focus                :       0.000000                            0.000000 ~&dyRtW
4  
Thickness tolerance on surface 2 [Nm4sI11  
TTHI   2   3        -0.20000000     0.54478712     0.00075478     0.20000000     0.54327558    -0.00075675 kRJ4-n^@><  
Change in Focus                :       0.000000                           -0.000000 l|2D/K5  
Decenter X tolerance on surfaces 1 through 3 :M3oUE{  
TEDX   1   3        -0.20000000     0.54401464   -1.7700E-005     0.20000000     0.54401464   -1.7700E-005 D/ybFk  
Change in Focus                :       0.000000                            0.000000 rqPo)AL  
Decenter Y tolerance on surfaces 1 through 3 sic"pn],U  
TEDY   1   3        -0.20000000     0.54401464   -1.7700E-005     0.20000000     0.54401464   -1.7700E-005 <xpph t<  
Change in Focus                :       0.000000                            0.000000 e}Vw!w  
Tilt X tolerance on surfaces 1 through 3 (degrees)  uF|3/x=  
TETX   1   3        -0.20000000     0.54897548     0.00494314     0.20000000     0.54897548     0.00494314 p{A}pnjf  
Change in Focus                :       0.000000                            0.000000 ,_.I\
EY[  
Tilt Y tolerance on surfaces 1 through 3 (degrees) CqMhk  
TETY   1   3        -0.20000000     0.54897548     0.00494314     0.20000000     0.54897548     0.00494314 g#]" hn  
Change in Focus                :       0.000000                            0.000000 N?Q+>
 
Decenter X tolerance on surface 1 yOU(2"8p  
TSDX   1            -0.20000000     0.53999563    -0.00403671     0.20000000     0.53999563    -0.00403671 7c
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Change in Focus                :       0.000000                            0.000000 r|Z3$J{^"  
Decenter Y tolerance on surface 1 ^nJyo:DO;  
TSDY   1            -0.20000000     0.53999563    -0.00403671     0.20000000     0.53999563    -0.00403671 !^#jwRpeN  
Change in Focus                :       0.000000                            0.000000 1@48BN8cm'  
Tilt X tolerance on surface (degrees) 1 z /KK)u(q  
TSTX   1            -0.20000000     0.42678383    -0.11724851     0.20000000     0.42678383    -0.11724851 $,=6[T!z+e  
Change in Focus                :       0.000000                            0.000000 !%+2Yifna  
Tilt Y tolerance on surface (degrees) 1 !)"%),>}o  
TSTY   1            -0.20000000     0.42678383    -0.11724851     0.20000000     0.42678383    -0.11724851 'VyM{:8  
Change in Focus                :       0.000000                            0.000000 Y`7~Am/r;&  
Decenter X tolerance on surface 2 :K`ESq!8u  
TSDX   2            -0.20000000     0.51705427    -0.02697807     0.20000000     0.51705427    -0.02697807 EKEjv|_)  
Change in Focus                :       0.000000                            0.000000 ZX!r1*c 6  
Decenter Y tolerance on surface 2 h!~3Dw>,N  
TSDY   2            -0.20000000     0.51705427    -0.02697807     0.20000000     0.51705427    -0.02697807 3`d
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Change in Focus                :       0.000000                            0.000000 5Wyz=+?m|  
Tilt X tolerance on surface (degrees) 2 [Aj Q#;#Q  
TSTX   2            -0.20000000     0.35349910    -0.19053324     0.20000000     0.35349910    -0.19053324 N7'OPTKt&  
Change in Focus                :       0.000000                            0.000000 1wzqGmjmt  
Tilt Y tolerance on surface (degrees) 2 Wt)Drv{@ {  
TSTY   2            -0.20000000     0.35349910    -0.19053324     0.20000000     0.35349910    -0.19053324 d2oh/j6`TA  
Change in Focus                :       0.000000                            0.000000 +a&p$\  
Decenter X tolerance on surface 3 0iULCK  
TSDX   3            -0.20000000     0.53419039    -0.00984195     0.20000000     0.53419039    -0.00984195 LTNj| u  
Change in Focus                :       0.000000                            0.000000 9I1tN  
Decenter Y tolerance on surface 3 IdYzgDH  
TSDY   3            -0.20000000     0.53419039    -0.00984195     0.20000000     0.53419039    -0.00984195 S6}@I ,Q  
Change in Focus                :       0.000000                            0.000000 "|;:>{JC  
Tilt X tolerance on surface (degrees) 3 Hsih[f  
TSTX   3            -0.20000000     0.42861670    -0.11541563     0.20000000     0.42861670    -0.11541563 }kw/W#)J  
Change in Focus                :       0.000000                            0.000000 f|^dD`  
Tilt Y tolerance on surface (degrees) 3 IG(?xf\C  
TSTY   3            -0.20000000     0.42861670    -0.11541563     0.20000000     0.42861670    -0.11541563 t+5E#!y  
Change in Focus                :       0.000000                            0.000000 o7mZzzP  
Irregularity of surface 1 in fringes 6x"Q  
TIRR   1            -0.20000000     0.50973587    -0.03429647     0.20000000     0.57333868     0.02930634 Gl1jxxd  
Change in Focus                :       0.000000                            0.000000 $0bjKy  
Irregularity of surface 2 in fringes <;E
 
TIRR   2            -0.20000000     0.53400904    -0.01002330     0.20000000     0.55360281     0.00957047 S3L~~X/=  
Change in Focus                :       0.000000                            0.000000 ;a-$D]Db  
Irregularity of surface 3 in fringes V"p!Bf  
TIRR   3            -0.20000000     0.58078982     0.03675748     0.20000000     0.49904394    -0.04498840 4}`  
Change in Focus                :       0.000000                            0.000000 z0|&W&&D  
Index tolerance on surface 1 GN KF&M  
TIND   1            -0.00100000     0.52606778    -0.01796456     0.00100000     0.56121811     0.01718578 "ZTTg>r  
Change in Focus                :       0.000000                            0.000000 .(pN5JI*  
Index tolerance on surface 2 /C/id)h>  
TIND   2            -0.00100000     0.55639086     0.01235852     0.00100000     0.53126361    -0.01276872 pO8ePc@=D  
Change in Focus                :       0.000000                           -0.000000 jTLSdul+  
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Worst offenders: 83;NIE;  
Type                      Value      Criterion        Change SQeRSz8bK4  
TSTY   2            -0.20000000     0.35349910    -0.19053324 nW;g2
8  
TSTY   2             0.20000000     0.35349910    -0.19053324 D;UV&.$'v  
TSTX   2            -0.20000000     0.35349910    -0.19053324 dt~YW  
TSTX   2             0.20000000     0.35349910    -0.19053324 nXjP
x@  
TSTY   1            -0.20000000     0.42678383    -0.11724851 kId n6 Wx,  
TSTY   1             0.20000000     0.42678383    -0.11724851 5K|"\  
TSTX   1            -0.20000000     0.42678383    -0.11724851 h"H2z1$  
TSTX   1             0.20000000     0.42678383    -0.11724851 W8lx~:v  
TSTY   3            -0.20000000     0.42861670    -0.11541563 ,f1q)Qf  
TSTY   3             0.20000000     0.42861670    -0.11541563 AfG/JWSo}  
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Estimated Performance Changes based upon Root-Sum-Square method: p{PE@KO:  
Nominal MTF                 :     0.54403234 C7H/N<VAq  
Estimated change            :    -0.36299231 }(egMx;"3J  
Estimated MTF               :     0.18104003 }K8/-d6  
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Compensator Statistics: g;ZxvR)ZJk  
Change in back focus: 1SrJ6W @j[  
Minimum            :        -0.000000 CgzD$`~  
Maximum            :         0.000000 }du XC[6  
Mean               :        -0.000000 wH~kTU2br  
Standard Deviation :         0.000000 YC_1Ks  
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Monte Carlo Analysis: RT>{*E<I  
Number of trials: 20 V138d?Mm  
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Initial Statistics: Normal Distribution G;f/Tch  
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  Trial       Criterion        Change F @Te@n  
      1     0.42804416    -0.11598818 "*,XL uv>  
Change in Focus                :      -0.400171 %F kMv  
      2     0.54384387    -0.00018847 L28*1]\Jh  
Change in Focus                :       1.018470 t%530EB3  
      3     0.44510003    -0.09893230 M>M`baM1  
Change in Focus                :      -0.601922 zD3mX<sw  
      4     0.18154684    -0.36248550 &YDK (&>  
Change in Focus                :       0.920681 ,t)x{I;C)  
      5     0.28665820    -0.25737414 1xv8gC:6  
Change in Focus                :       1.253875 2>*%q%81  
      6     0.21263372    -0.33139862 ;(
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Change in Focus                :      -0.903878 3_q3Bk  
      7     0.40051424    -0.14351809 CR2_;x:0  
Change in Focus                :      -1.354815 y<
b{Ji e  
      8     0.48754161    -0.05649072 nYbhy}y  
Change in Focus                :       0.215922 [b:e:P 2  
      9     0.40357468    -0.14045766 GWvH[0  
Change in Focus                :       0.281783 R0oKbs{  
     10     0.26315315    -0.28087919 ;W>Y:NCrp  
Change in Focus                :      -1.048393 G<M:Ak+~  
     11     0.26120585    -0.28282649 t'm;:J1  
Change in Focus                :       1.017611 ^[15&T5  
     12     0.24033815    -0.30369419 nNXgW  
Change in Focus                :      -0.109292 oA1a/[#  
     13     0.37164046    -0.17239188 #M A4  
Change in Focus                :      -0.692430 vky.^  
     14     0.48597489    -0.05805744 fr!Pj(Q1  
Change in Focus                :      -0.662040 GJqE!I,.  
     15     0.21462327    -0.32940907 b~-%c_  
Change in Focus                :       1.611296 xUfbW;;]UU  
     16     0.43378226    -0.11025008 |pa$*/!NT  
Change in Focus                :      -0.640081 sZ?mP;Q  
     17     0.39321881    -0.15081353 lDmtQk-SN  
Change in Focus                :       0.914906 9M"].~iNE  
     18     0.20692530    -0.33710703 S.!UPkWH  
Change in Focus                :       0.801607 j5I`a 1j`  
     19     0.51374068    -0.03029165 Hi]cxD*`  
Change in Focus                :       0.947293 :6q]F<oK  
     20     0.38013374    -0.16389860 .CSS}4  
Change in Focus                :       0.667010 2c?qV  
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Number of traceable Monte Carlo files generated: 20 TY(bPq  
xJ2*LM-  
Nominal     0.54403234 z#F.xVg'  
Best        0.54384387    Trial     2 q64k7<C,  
Worst       0.18154684    Trial     4 fh^lO ^  
Mean        0.35770970 rxme(9M  
Std Dev     0.11156454 vy,&N^P  

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^uJU}v:  
Compensator Statistics: p\{-t84n  
Change in back focus: n[YEOkiG  
Minimum            :        -1.354815 Tlj:%yK2  
Maximum            :         1.611296 E\m5%bK\B  
Mean               :         0.161872 KgN)JD>  
Standard Deviation :         0.869664 nADX0KI  
N8`?t5  
90% >       0.20977951               8QK5z;E2~  
80% >       0.22748071               H'F6$ypoS  
50% >       0.38667627               ^s.V;R  
20% >       0.46553746               M/Pme&%  
10% >       0.50064115                7w;O}ax
I  
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End of Run.
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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 wM[~2C=vx  

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 %<8nF5  
W(RF n`g\  
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                 NvjJb-u  
80% >       0.22748071                 :T3/yd62N  
50% >       0.38667627                 \RQ='/H*  
20% >       0.46553746                 eK/?%t  
10% >       0.50064115 aj,)P3DJu  
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最后这个数值是MTF值呢，还是MTF的公差？ 9s +z B  
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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？？？   vhr+g 'tf  
mYB`)M*Y  
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  : /L) 9tt.  
90% >       0.20977951                 w`yx=i#  
80% >       0.22748071                 x;$|#]+  
50% >       0.38667627                 j~ym<-[{a  
20% >       0.46553746                 (b/d0HCND  
10% >       0.50064115 [h}K$q  
....... .PVLWW  

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EHf)^]Z  
这些数值都是MTF值

Criterion           : Geometric MTF average S&T at 30.0000 cycles per mm   hN4VlNKu  
Mode                : Sensitivities ;bHfn-X  
Sampling            : 2 .K9l*-e[=  
Nominal Criterion   : 0.54403234 dt-K  
Test Wavelength     : 0.6328 OCx5/ 88X  
rnvQ<671W  
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？ }'`xu9<  
4;\Y?M}g?  
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