[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 &R5M&IwL  
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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 pbzbh&Y  
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图片:2.jpg

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然后运行分析的结果如下： ks r5P~  
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Analysis of Tolerances A0]o/IBz
 
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File : E:\光学设计资料\zemax练习\f500.ZMX e{}o:r  
Title: f.f4<_v'h  
Date : TUE JUN 21 2011 PaDT)RrEM  
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Units are Millimeters. xw-q)u  
All changes are computed using linear differences. RdDcMZ  
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Paraxial Focus compensation only. = ]@xXVf/  
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WARNING: Solves should be removed prior to tolerancing. !<LS4s;  
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Mnemonics: q#a21~S<  
TFRN: Tolerance on curvature in fringes. X,N@`  
TTHI: Tolerance on thickness. UA9LI<Y  
TSDX: Tolerance on surface decentering in x. 5&kR1Bp#-  
TSDY: Tolerance on surface decentering in y. YHA[PF   
TSTX: Tolerance on surface tilt in x (degrees). |{[i M  
TSTY: Tolerance on surface tilt in y (degrees). `o3d@Vc  
TIRR: Tolerance on irregularity (fringes). yJL"uleRT  
TIND: Tolerance on Nd index of refraction. {S}@P~H=  
TEDX: Tolerance on element decentering in x. q kKABow  
TEDY: Tolerance on element decentering in y. Sy'>JHx  
TETX: Tolerance on element tilt in x (degrees). E\zhxiI  
TETY: Tolerance on element tilt in y (degrees). bn`zI~WS  
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WARNING: RAY AIMING IS OFF. Very loose tolerances may not be computed accurately. -,;Ep'  
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WARNING: Boundary constraints on compensators will be ignored. Imwx~eo  
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Criterion           : Geometric MTF average S&T at 30.0000 cycles per mm kW~F*  
Mode                : Sensitivities
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Sampling            : 2 ^pjez+  
Nominal Criterion   : 0.54403234 #Kl2K4  
Test Wavelength     : 0.6328 mq
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Fields: XY Symmetric Angle in degrees _tk5?9Ykn  
#      X-Field      Y-Field       Weight    VDX    VDY    VCX    VCY p~.@8r(  
1   0.000E+000   0.000E+000   1.000E+000  0.000  0.000  0.000  0.000 2T5xSpC  
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Sensitivity Analysis: &rl>{Uvq  
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                 |----------------- Minimum ----------------| |----------------- Maximum ----------------| *o[%?$8T  
Type                      Value      Criterion        Change          Value      Criterion        Change t0>{0 5  
Fringe tolerance on surface 1 `Ek!;u>  
TFRN   1            -1.00000000     0.54257256    -0.00145977     1.00000000     0.54548607     0.00145374 X w8il  
Change in Focus                :      -0.000000                            0.000000 nsT|,O  
Fringe tolerance on surface 2 ;Kf|a}m-  
TFRN   2            -1.00000000     0.54177471    -0.00225762     1.00000000     0.54627463     0.00224230 kOCxIJ!Xp=  
Change in Focus                :       0.000000                            0.000000 8w&rj-  
Fringe tolerance on surface 3 \uk#pL  
TFRN   3            -1.00000000     0.54779866     0.00376632     1.00000000     0.54022572    -0.00380662 FZ9<Q  
Change in Focus                :      -0.000000                            0.000000 R`Lm"5w  
Thickness tolerance on surface 1 qX(%Wn;n  
TTHI   1   3        -0.20000000     0.54321462    -0.00081772     0.20000000     0.54484759     0.00081525 [hL1PWKs  
Change in Focus                :       0.000000                            0.000000 +29\'w,  
Thickness tolerance on surface 2 ?I'-C?(t@1  
TTHI   2   3        -0.20000000     0.54478712     0.00075478     0.20000000     0.54327558    -0.00075675 2eU[*x  
Change in Focus                :       0.000000                           -0.000000 lX*;KHT)  
Decenter X tolerance on surfaces 1 through 3 m GhJn  
TEDX   1   3        -0.20000000     0.54401464   -1.7700E-005     0.20000000     0.54401464   -1.7700E-005 tFaE cP  
Change in Focus                :       0.000000                            0.000000 Zir`IQ$  
Decenter Y tolerance on surfaces 1 through 3 :\U3bkv+  
TEDY   1   3        -0.20000000     0.54401464   -1.7700E-005     0.20000000     0.54401464   -1.7700E-005 Hg`{9v  
Change in Focus                :       0.000000                            0.000000 H/k W :k  
Tilt X tolerance on surfaces 1 through 3 (degrees) .$0Ob<.  
TETX   1   3        -0.20000000     0.54897548     0.00494314     0.20000000     0.54897548     0.00494314 YfwJBzD  
Change in Focus                :       0.000000                            0.000000 rcZ SC3  
Tilt Y tolerance on surfaces 1 through 3 (degrees) M0SH-0T;Z  
TETY   1   3        -0.20000000     0.54897548     0.00494314     0.20000000     0.54897548     0.00494314 X u):.0I  
Change in Focus                :       0.000000                            0.000000 p'uz2
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Decenter X tolerance on surface 1 ~(j'a!#Vvk  
TSDX   1            -0.20000000     0.53999563    -0.00403671     0.20000000     0.53999563    -0.00403671 o#xg:m_py  
Change in Focus                :       0.000000                            0.000000 Yp]G)}'R  
Decenter Y tolerance on surface 1 3\n{,Q  
TSDY   1            -0.20000000     0.53999563    -0.00403671     0.20000000     0.53999563    -0.00403671 r^t{Ii~  
Change in Focus                :       0.000000                            0.000000 8 %j{4$  
Tilt X tolerance on surface (degrees) 1 s[q4K  
TSTX   1            -0.20000000     0.42678383    -0.11724851     0.20000000     0.42678383    -0.11724851 c@-K  
Change in Focus                :       0.000000                            0.000000 4nH91Z9=  
Tilt Y tolerance on surface (degrees) 1 k|3(dXLG  
TSTY   1            -0.20000000     0.42678383    -0.11724851     0.20000000     0.42678383    -0.11724851 1=Zw=ufqV  
Change in Focus                :       0.000000                            0.000000 \( <{)GpBi  
Decenter X tolerance on surface 2 9JV 3  
TSDX   2            -0.20000000     0.51705427    -0.02697807     0.20000000     0.51705427    -0.02697807 :bRR(sP  
Change in Focus                :       0.000000                            0.000000 Tud1xq  
Decenter Y tolerance on surface 2 h.$__Gs  
TSDY   2            -0.20000000     0.51705427    -0.02697807     0.20000000     0.51705427    -0.02697807 %hbLT{w  
Change in Focus                :       0.000000                            0.000000 +MZO%4  
Tilt X tolerance on surface (degrees) 2 /iy*3P,`  
TSTX   2            -0.20000000     0.35349910    -0.19053324     0.20000000     0.35349910    -0.19053324 5^K#Tj ;2  
Change in Focus                :       0.000000                            0.000000 ~H|LWCU)K8  
Tilt Y tolerance on surface (degrees) 2 
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TSTY   2            -0.20000000     0.35349910    -0.19053324     0.20000000     0.35349910    -0.19053324 SP*JleQN  
Change in Focus                :       0.000000                            0.000000 h ^h-pd  
Decenter X tolerance on surface 3 +;*(a3Gp  
TSDX   3            -0.20000000     0.53419039    -0.00984195     0.20000000     0.53419039    -0.00984195 0BB@E(*  
Change in Focus                :       0.000000                            0.000000 BZ+ mO  
Decenter Y tolerance on surface 3 r!$NZ2I  
TSDY   3            -0.20000000     0.53419039    -0.00984195     0.20000000     0.53419039    -0.00984195 tOg 8L2  
Change in Focus                :       0.000000                            0.000000 k!/_/^{  
Tilt X tolerance on surface (degrees) 3 46Q;F  
TSTX   3            -0.20000000     0.42861670    -0.11541563     0.20000000     0.42861670    -0.11541563 pLQSG}N  
Change in Focus                :       0.000000                            0.000000 zQ5jx5B":  
Tilt Y tolerance on surface (degrees) 3 z8(R.TB  
TSTY   3            -0.20000000     0.42861670    -0.11541563     0.20000000     0.42861670    -0.11541563 F|Dz]ar  
Change in Focus                :       0.000000                            0.000000 tnF9Vj[#%_  
Irregularity of surface 1 in fringes '?G[T28  
TIRR   1            -0.20000000     0.50973587    -0.03429647     0.20000000     0.57333868     0.02930634 3y=<w|4F  
Change in Focus                :       0.000000                            0.000000 Flujwh@rg  
Irregularity of surface 2 in fringes [du>ff  
TIRR   2            -0.20000000     0.53400904    -0.01002330     0.20000000     0.55360281     0.00957047 >3`ctbe  
Change in Focus                :       0.000000                            0.000000 |5IY`;+9  
Irregularity of surface 3 in fringes gQh Ccv  
TIRR   3            -0.20000000     0.58078982     0.03675748     0.20000000     0.49904394    -0.04498840 2v9s@k/k)6  
Change in Focus                :       0.000000                            0.000000 v^],loi<V  
Index tolerance on surface 1 G#n^@kc*,  
TIND   1            -0.00100000     0.52606778    -0.01796456     0.00100000     0.56121811     0.01718578 gLaO#cQ%  
Change in Focus                :       0.000000                            0.000000 nn)`eR&  
Index tolerance on surface 2 ^s@*ISY  
TIND   2            -0.00100000     0.55639086     0.01235852     0.00100000     0.53126361    -0.01276872 6l\UNG7  
Change in Focus                :       0.000000                           -0.000000 UI<PNQvo9  
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Worst offenders: wEfz2Eq  
Type                      Value      Criterion        Change (: TGev  
TSTY   2            -0.20000000     0.35349910    -0.19053324 9{%g-u\  
TSTY   2             0.20000000     0.35349910    -0.19053324 !UBDx$]^  
TSTX   2            -0.20000000     0.35349910    -0.19053324 y/}VtD  
TSTX   2             0.20000000     0.35349910    -0.19053324 a4jnu:e  
TSTY   1            -0.20000000     0.42678383    -0.11724851 L_~I
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TSTY   1             0.20000000     0.42678383    -0.11724851 pl#o!j(i  
TSTX   1            -0.20000000     0.42678383    -0.11724851 QK?2E  
TSTX   1             0.20000000     0.42678383    -0.11724851 7c
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TSTY   3            -0.20000000     0.42861670    -0.11541563 hdf8U  
TSTY   3             0.20000000     0.42861670    -0.11541563 *)NR$9lGv  
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Estimated Performance Changes based upon Root-Sum-Square method: zK>'tFU  
Nominal MTF                 :     0.54403234 XJJ[F|k~  
Estimated change            :    -0.36299231 l<aqiZSY  
Estimated MTF               :     0.18104003 HhWwc#B  
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Compensator Statistics: u_
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Change in back focus: 5S\][;u  
Minimum            :        -0.000000 Y*kh$E%<#  
Maximum            :         0.000000 Lf; ta  
Mean               :        -0.000000 @7Rt4}g  
Standard Deviation :         0.000000 3%[)!zKv  
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Monte Carlo Analysis: T+K` ^xv_L  
Number of trials: 20 UU.mdSL  
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Initial Statistics: Normal Distribution 4aalhy<j  
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  Trial       Criterion        Change wsf Hd<Z_  
      1     0.42804416    -0.11598818 )4!CR/ao  
Change in Focus                :      -0.400171 rysP)e  
      2     0.54384387    -0.00018847 + 9\:$wMN  
Change in Focus                :       1.018470 NoJnchiU  
      3     0.44510003    -0.09893230 +H[}T ]  
Change in Focus                :      -0.601922 iJ`%yg,  
      4     0.18154684    -0.36248550 agU%z:M{  
Change in Focus                :       0.920681 b:FEp'ZS  
      5     0.28665820    -0.25737414 ;!l*7}5X=  
Change in Focus                :       1.253875 'ZGT`'ri  
      6     0.21263372    -0.33139862 6z9R1&~%  
Change in Focus                :      -0.903878 a%Z4_ToLZ  
      7     0.40051424    -0.14351809 `W"a!,s2  
Change in Focus                :      -1.354815 Vq3]7l  
      8     0.48754161    -0.05649072 ]k'#g Z$  
Change in Focus                :       0.215922 4;BW  
      9     0.40357468    -0.14045766 =E [4H  
Change in Focus                :       0.281783 'w`SBYQ5  
     10     0.26315315    -0.28087919 .Bb$j=  
Change in Focus                :      -1.048393 Q$
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     11     0.26120585    -0.28282649 <[Tq7cO0  
Change in Focus                :       1.017611 Qb!!J4|!  
     12     0.24033815    -0.30369419 KjFZ  
Change in Focus                :      -0.109292 BKE\SWu  
     13     0.37164046    -0.17239188 ( oQ'4,
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Change in Focus                :      -0.692430 RNv{n mf  
     14     0.48597489    -0.05805744 bGZhUEq  
Change in Focus                :      -0.662040 DO7-=74=  
     15     0.21462327    -0.32940907 aUypt(dv  
Change in Focus                :       1.611296 xb4Pt`x)rS  
     16     0.43378226    -0.11025008 <Jwi~I=^  
Change in Focus                :      -0.640081 IvEMg2f}  
     17     0.39321881    -0.15081353 ]regi- LGU  
Change in Focus                :       0.914906 y2z{rd  
     18     0.20692530    -0.33710703 "XGD:>Q.  
Change in Focus                :       0.801607 h]kn%?fpmB  
     19     0.51374068    -0.03029165 42b.7E  
Change in Focus                :       0.947293 dV5P
hP>6  
     20     0.38013374    -0.16389860 DNm(:%)0  
Change in Focus                :       0.667010 q%OcLZ<,  
6uu^A9x  
Number of traceable Monte Carlo files generated: 20 ad"'O]  
x`]Ofr'  
Nominal     0.54403234 ^~ Ekg:`  
Best        0.54384387    Trial     2 M0cd-Dn  
Worst       0.18154684    Trial     4 %*$5!;  
Mean        0.35770970 zWy ,Om8P  
Std Dev     0.11156454 mSU@UD|'  
6N9 c<JC  
7V~ "x&Eu  
Compensator Statistics: P7's8K
OoS  
Change in back focus: &}v
R(y*#c  
Minimum            :        -1.354815 \:]DFZ=!  
Maximum            :         1.611296 f'1(y\_fb  
Mean               :         0.161872 ~c9>Nr9|`  
Standard Deviation :         0.869664 xU@1!%l@  
seu ~'s-  
90% >       0.20977951               j_!bT!8  
80% >       0.22748071               DW1@<X  
50% >       0.38667627               TNh=4xQ}  
20% >       0.46553746               x|.v{tQa  
10% >       0.50064115                Ba/RO36&c  
9GO}&7   
End of Run. 6tOCZ'f  
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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 0yn[L3x7  

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 i*X{^A73"  
/r276Q  
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                 Tp?-*K  
80% >       0.22748071                 dByjcTPA  
50% >       0.38667627                 -^Xy%  
20% >       0.46553746                 .$Y? W<  
10% >       0.50064115 1SUzzlRx  
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最后这个数值是MTF值呢，还是MTF的公差？ i E9\_MA  
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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？？？   Yrxk Kw#  
09d9S`cS\  
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  : W~ruN4q.  
90% >       0.20977951                 $a(`ve|  
80% >       0.22748071                 dv!r.  
50% >       0.38667627                 M0w/wt|  
20% >       0.46553746                 xu\eXx6H  
10% >       0.50064115 bL1m'^r  
....... BBnq_w"a  

;:]\KJm}?  
Y#HI;Y^RP  
这些数值都是MTF值

Criterion           : Geometric MTF average S&T at 30.0000 cycles per mm   R_N:#K.M  
Mode                : Sensitivities lzhqcL"  
Sampling            : 2 )T|L,Lp  
Nominal Criterion   : 0.54403234 j0mM>X HB  
Test Wavelength     : 0.6328 qCPmbg  
WZn.;  
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？ -{jdn%Y7CK  
ytAWOt}`  
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