[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 o<l4}~a  
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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 PLo.q|%  
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图片:2.jpg

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然后运行分析的结果如下： 1<59)RiO>  
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Analysis of Tolerances cS ];?tqrA  
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File : E:\光学设计资料\zemax练习\f500.ZMX p6}
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Title: 29Q5s$YD@  
Date : TUE JUN 21 2011 KI>7h.t  
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Units are Millimeters. J;T_9  
All changes are computed using linear differences. c@nl;u)n  
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Paraxial Focus compensation only. s:]rL&|  
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WARNING: Solves should be removed prior to tolerancing. Q}fAAZ&7h  
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Mnemonics: p Y>yJ)  
TFRN: Tolerance on curvature in fringes. @#Xzk?+  
TTHI: Tolerance on thickness. !^"hYp`  
TSDX: Tolerance on surface decentering in x. ]B,S<*h  
TSDY: Tolerance on surface decentering in y. ]&G5/]f  
TSTX: Tolerance on surface tilt in x (degrees). :Dr& {3>  
TSTY: Tolerance on surface tilt in y (degrees). ^~`8 - TE  
TIRR: Tolerance on irregularity (fringes). :sPku<1is  
TIND: Tolerance on Nd index of refraction. *10e)rzM  
TEDX: Tolerance on element decentering in x. =v;-{oN!  
TEDY: Tolerance on element decentering in y. \ I?;%  
TETX: Tolerance on element tilt in x (degrees). WVNQ}KY  
TETY: Tolerance on element tilt in y (degrees). nev*TYY?A  
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WARNING: RAY AIMING IS OFF. Very loose tolerances may not be computed accurately. HK[sHB&
 
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WARNING: Boundary constraints on compensators will be ignored. IYCKF/2o  
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Criterion           : Geometric MTF average S&T at 30.0000 cycles per mm ka>RAr J  
Mode                : Sensitivities xwRnrWd^6  
Sampling            : 2 G8;S`-D1a,  
Nominal Criterion   : 0.54403234 =AKW(v  
Test Wavelength     : 0.6328 =V,'f  
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Fields: XY Symmetric Angle in degrees 6=@n b3D%  
#      X-Field      Y-Field       Weight    VDX    VDY    VCX    VCY y1 }d(%  
1   0.000E+000   0.000E+000   1.000E+000  0.000  0.000  0.000  0.000 c~tSt.^WX  
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Sensitivity Analysis: U|Jo[4A  
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                 |----------------- Minimum ----------------| |----------------- Maximum ----------------| ,j

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Type                      Value      Criterion        Change          Value      Criterion        Change <m6Xh^Ko;  
Fringe tolerance on surface 1 \iL,l87  
TFRN   1            -1.00000000     0.54257256    -0.00145977     1.00000000     0.54548607     0.00145374 O?2
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Change in Focus                :      -0.000000                            0.000000 \YKh'|04  
Fringe tolerance on surface 2 tAC,'im:*  
TFRN   2            -1.00000000     0.54177471    -0.00225762     1.00000000     0.54627463     0.00224230 -pD&@Wlwak  
Change in Focus                :       0.000000                            0.000000 ROjjN W`W  
Fringe tolerance on surface 3 zgRP!q<9tt  
TFRN   3            -1.00000000     0.54779866     0.00376632     1.00000000     0.54022572    -0.00380662 9Y4N  
Change in Focus                :      -0.000000                            0.000000 $@Ay0GEI"  
Thickness tolerance on surface 1 LN
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TTHI   1   3        -0.20000000     0.54321462    -0.00081772     0.20000000     0.54484759     0.00081525 a[$.B2U  
Change in Focus                :       0.000000                            0.000000 SQ Fey~  
Thickness tolerance on surface 2 $3[cBX.=  
TTHI   2   3        -0.20000000     0.54478712     0.00075478     0.20000000     0.54327558    -0.00075675 DdQf%W8u  
Change in Focus                :       0.000000                           -0.000000 h#n8mtt&i  
Decenter X tolerance on surfaces 1 through 3 L$Leo6<3a  
TEDX   1   3        -0.20000000     0.54401464   -1.7700E-005     0.20000000     0.54401464   -1.7700E-005 6>L.)V  
Change in Focus                :       0.000000                            0.000000 j0%0yb{-^  
Decenter Y tolerance on surfaces 1 through 3 RYV6hp)|  
TEDY   1   3        -0.20000000     0.54401464   -1.7700E-005     0.20000000     0.54401464   -1.7700E-005 eFnsf}(Iy  
Change in Focus                :       0.000000                            0.000000 L
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Tilt X tolerance on surfaces 1 through 3 (degrees) $HXB !$d  
TETX   1   3        -0.20000000     0.54897548     0.00494314     0.20000000     0.54897548     0.00494314 2 Lamvf  
Change in Focus                :       0.000000                            0.000000 kR6 t .  
Tilt Y tolerance on surfaces 1 through 3 (degrees) (wlsn6h  
TETY   1   3        -0.20000000     0.54897548     0.00494314     0.20000000     0.54897548     0.00494314 XF7W'^  
Change in Focus                :       0.000000                            0.000000 !Q(xOc9>Ug  
Decenter X tolerance on surface 1 vl5n%m H>^  
TSDX   1            -0.20000000     0.53999563    -0.00403671     0.20000000     0.53999563    -0.00403671 cV{ZDq  
Change in Focus                :       0.000000                            0.000000 {''|iwLr  
Decenter Y tolerance on surface 1 O9|'8"AF  
TSDY   1            -0.20000000     0.53999563    -0.00403671     0.20000000     0.53999563    -0.00403671 VA%"IAl  
Change in Focus                :       0.000000                            0.000000 0o<qEo^  
Tilt X tolerance on surface (degrees) 1 r;XQ i  
TSTX   1            -0.20000000     0.42678383    -0.11724851     0.20000000     0.42678383    -0.11724851 YDNqWP7s  
Change in Focus                :       0.000000                            0.000000 $&C(oh$:  
Tilt Y tolerance on surface (degrees) 1 jccW8g~ ~  
TSTY   1            -0.20000000     0.42678383    -0.11724851     0.20000000     0.42678383    -0.11724851 9_Re,h  
Change in Focus                :       0.000000                            0.000000 @*DIB+K  
Decenter X tolerance on surface 2 da2[   
TSDX   2            -0.20000000     0.51705427    -0.02697807     0.20000000     0.51705427    -0.02697807 ]v{fFmL  
Change in Focus                :       0.000000                            0.000000 .?
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Decenter Y tolerance on surface 2 [Kj:~~`T   
TSDY   2            -0.20000000     0.51705427    -0.02697807     0.20000000     0.51705427    -0.02697807 Ft7a\vn*B  
Change in Focus                :       0.000000                            0.000000 )R^Cqo'  
Tilt X tolerance on surface (degrees) 2 @"I#b99  
TSTX   2            -0.20000000     0.35349910    -0.19053324     0.20000000     0.35349910    -0.19053324 +hg\DqO^M  
Change in Focus                :       0.000000                            0.000000 rEhf_[Dv  
Tilt Y tolerance on surface (degrees) 2 X}*o[;2G  
TSTY   2            -0.20000000     0.35349910    -0.19053324     0.20000000     0.35349910    -0.19053324 vaj66nV  
Change in Focus                :       0.000000                            0.000000 N4To#Q1w  
Decenter X tolerance on surface 3 KCk?)Qv  
TSDX   3            -0.20000000     0.53419039    -0.00984195     0.20000000     0.53419039    -0.00984195 2\w=U,;(  
Change in Focus                :       0.000000                            0.000000 u!uDu,y  
Decenter Y tolerance on surface 3 gx*rSS?=N  
TSDY   3            -0.20000000     0.53419039    -0.00984195     0.20000000     0.53419039    -0.00984195 PE
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Change in Focus                :       0.000000                            0.000000 &'7"i~pC  
Tilt X tolerance on surface (degrees) 3 ,z1!~gIal  
TSTX   3            -0.20000000     0.42861670    -0.11541563     0.20000000     0.42861670    -0.11541563 7I(t,AK
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Change in Focus                :       0.000000                            0.000000 UNQRtR/  
Tilt Y tolerance on surface (degrees) 3 JQ_gM._3  
TSTY   3            -0.20000000     0.42861670    -0.11541563     0.20000000     0.42861670    -0.11541563 ,0Zn hS)kq  
Change in Focus                :       0.000000                            0.000000 M_1Tx  
Irregularity of surface 1 in fringes v1C
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TIRR   1            -0.20000000     0.50973587    -0.03429647     0.20000000     0.57333868     0.02930634 grQnV' q  
Change in Focus                :       0.000000                            0.000000 "rGOw'!q>  
Irregularity of surface 2 in fringes <8)s  
TIRR   2            -0.20000000     0.53400904    -0.01002330     0.20000000     0.55360281     0.00957047 +^kxFQ(:  
Change in Focus                :       0.000000                            0.000000 rh`.$/^  
Irregularity of surface 3 in fringes [S]!+YBK  
TIRR   3            -0.20000000     0.58078982     0.03675748     0.20000000     0.49904394    -0.04498840 VxN64;|=  
Change in Focus                :       0.000000                            0.000000 Zva  
Index tolerance on surface 1 z"K( bw6  
TIND   1            -0.00100000     0.52606778    -0.01796456     0.00100000     0.56121811     0.01718578 h)_Gxe"x  
Change in Focus                :       0.000000                            0.000000 yK077zH_  
Index tolerance on surface 2 v1r_Z($  
TIND   2            -0.00100000     0.55639086     0.01235852     0.00100000     0.53126361    -0.01276872 U+;>S$  
Change in Focus                :       0.000000                           -0.000000 Iz)hz9k  
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Worst offenders: n`)7Y`hBhP  
Type                      Value      Criterion        Change "PyWo  
TSTY   2            -0.20000000     0.35349910    -0.19053324 d>, V  
TSTY   2             0.20000000     0.35349910    -0.19053324 ~"0@u  
TSTX   2            -0.20000000     0.35349910    -0.19053324 FxfL+}?Q  
TSTX   2             0.20000000     0.35349910    -0.19053324 KO|pJ3  
TSTY   1            -0.20000000     0.42678383    -0.11724851 HRV*x!|I  
TSTY   1             0.20000000     0.42678383    -0.11724851 umjhG6  
TSTX   1            -0.20000000     0.42678383    -0.11724851 :B=8_M  
TSTX   1             0.20000000     0.42678383    -0.11724851 wm=RD98  
TSTY   3            -0.20000000     0.42861670    -0.11541563 ns#~}2"d  
TSTY   3             0.20000000     0.42861670    -0.11541563 gKN}Of@^1  
Mi}I0yhVm  
Estimated Performance Changes based upon Root-Sum-Square method: ole|J  
Nominal MTF                 :     0.54403234 <'[Ku;m  
Estimated change            :    -0.36299231 *J_iXu|  
Estimated MTF               :     0.18104003 -~][0PVL9  
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Compensator Statistics: ZCQ<%f  
Change in back focus: l>~`;W  
Minimum            :        -0.000000 iS1Gb$?  
Maximum            :         0.000000 %f(S'<DhC  
Mean               :        -0.000000 MCeu0e^)  
Standard Deviation :         0.000000 "#pzZ)Zh  
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Monte Carlo Analysis: vJRnBq+y  
Number of trials: 20 ]jc_=I6)  
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Initial Statistics: Normal Distribution Y}LLOj@L  
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  Trial       Criterion        Change .G}k/`a  
      1     0.42804416    -0.11598818 dC`tN5  
Change in Focus                :      -0.400171 'Y!pY]Z  
      2     0.54384387    -0.00018847 7qg<[  
Change in Focus                :       1.018470 !:"-:O}>=,  
      3     0.44510003    -0.09893230 >BNw
 
Change in Focus                :      -0.601922 jJ aV  
      4     0.18154684    -0.36248550 CV&zi6  
Change in Focus                :       0.920681 fxDj+Q1p  
      5     0.28665820    -0.25737414 ?MC(}dF0  
Change in Focus                :       1.253875 5VR.o!h3I  
      6     0.21263372    -0.33139862 aDL)|>"Q  
Change in Focus                :      -0.903878 4\N_ G @  
      7     0.40051424    -0.14351809 5vTv$2@  
Change in Focus                :      -1.354815 2{ o0@  
      8     0.48754161    -0.05649072 fcRj  
Change in Focus                :       0.215922 B0oxCc/'sZ  
      9     0.40357468    -0.14045766 hq<5lE^  
Change in Focus                :       0.281783 MO[kr2T  
     10     0.26315315    -0.28087919 }:`5,b%Y_  
Change in Focus                :      -1.048393 bj@xqAGl  
     11     0.26120585    -0.28282649 4xm&pQo{V6  
Change in Focus                :       1.017611 [yw%ih)  
     12     0.24033815    -0.30369419 H9RGU~q4s[  
Change in Focus                :      -0.109292 k-"<{V  
     13     0.37164046    -0.17239188 Y4#y34We  
Change in Focus                :      -0.692430 {A|bBg1!  
     14     0.48597489    -0.05805744 $$JIBf8  
Change in Focus                :      -0.662040 vsKl#R B  
     15     0.21462327    -0.32940907 g96T*T  
Change in Focus                :       1.611296 L=,OZ9aA  
     16     0.43378226    -0.11025008 uBmxh%]C~  
Change in Focus                :      -0.640081 K@HQrv<  
     17     0.39321881    -0.15081353 cd!|Ne>fe  
Change in Focus                :       0.914906 x>%joKY[
 
     18     0.20692530    -0.33710703 nv"G;W  
Change in Focus                :       0.801607 =3*Jj`AV  
     19     0.51374068    -0.03029165 9x=3W?K:,  
Change in Focus                :       0.947293 ~r<p@k=.#0  
     20     0.38013374    -0.16389860 {FWyu5.  
Change in Focus                :       0.667010 :N

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Number of traceable Monte Carlo files generated: 20 K;x~&G0=  
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Nominal     0.54403234 W;q+,Io  
Best        0.54384387    Trial     2 ibJl;sJ
 
Worst       0.18154684    Trial     4 P@gtdi(Q  
Mean        0.35770970 B7HQR{t  
Std Dev     0.11156454 nq'M?c#E  
e*:}$u8a  
7 _g+^e-"  
Compensator Statistics: :#{-RU@PS  
Change in back focus: h*s`^W3
 
Minimum            :        -1.354815 y"vX~LR  
Maximum            :         1.611296 :.$"kXm^  
Mean               :         0.161872 3_W{T@T  
Standard Deviation :         0.869664 S[mM4et|  
h4(JUio  
90% >       0.20977951               Uky9zGa  
80% >       0.22748071               Ky kSFB  
50% >       0.38667627               /b#q*x-b  
20% >       0.46553746               txq~+'A:+  
10% >       0.50064115                *|YU]b;W  
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End of Run. <Ct_d Cc  
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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 Uk,g> LG
  

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 /^:2<y8Ha  
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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                 E0l_--  
80% >       0.22748071                 -
5bA $  
50% >       0.38667627                 `rb>K  
20% >       0.46553746                 tous#(&pK  
10% >       0.50064115 .DguR2KT  
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最后这个数值是MTF值呢，还是MTF的公差？ 5`-UMz<
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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？？？   Gy"%R-j7  
>#(n"RCHf  
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  : / |r
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90% >       0.20977951                 TUK"nKSZ`.  
80% >       0.22748071                 0%Ll  
50% >       0.38667627                 &[Xu!LP  
20% >       0.46553746                 7, } $u  
10% >       0.50064115 &[vw 0N-  
....... |SZo' 6  

bm~W EX  
M~e0lg8  
这些数值都是MTF值

Criterion           : Geometric MTF average S&T at 30.0000 cycles per mm   *D}0[|O  
Mode                : Sensitivities s9;#!7ms  
Sampling            : 2 :$;Fhf<5  
Nominal Criterion   : 0.54403234 1@48BN8cm'  
Test Wavelength     : 0.6328 z /KK)u(q  
H<hVTc{K  
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？ 6fH@wQ"wN  
5,qj7HZF  
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