[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 !
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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 Or2J  
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图片:2.jpg

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然后运行分析的结果如下： ;LhNz()b  
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Analysis of Tolerances ,5 ylrE  
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File : E:\光学设计资料\zemax练习\f500.ZMX q'  
Title: tw*n+{]hi  
Date : TUE JUN 21 2011 1k:s~m?!  
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Units are Millimeters. -:P`Rln  
All changes are computed using linear differences. o(|fapK.  

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Paraxial Focus compensation only. <:YD.zAh|  
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WARNING: Solves should be removed prior to tolerancing. f'-) 3T  
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Mnemonics: ;V:Cf/@@R  
TFRN: Tolerance on curvature in fringes. .zMM!l3  
TTHI: Tolerance on thickness. b~L8m4L  
TSDX: Tolerance on surface decentering in x. #R#o/@|  
TSDY: Tolerance on surface decentering in y. Sd\+f6x  
TSTX: Tolerance on surface tilt in x (degrees). %(v<aEQtt  
TSTY: Tolerance on surface tilt in y (degrees). Qk_Mx"  
TIRR: Tolerance on irregularity (fringes). J_tI]?jrU  
TIND: Tolerance on Nd index of refraction. &58TX[#  
TEDX: Tolerance on element decentering in x. giNyD4uO  
TEDY: Tolerance on element decentering in y. &l| :1  
TETX: Tolerance on element tilt in x (degrees). !J%m7A  
TETY: Tolerance on element tilt in y (degrees). jaOt"iU.B  
:{tj5P!S  
WARNING: RAY AIMING IS OFF. Very loose tolerances may not be computed accurately. "?Mf%u1R  
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WARNING: Boundary constraints on compensators will be ignored. B;6N.X(K  
(+=TKI<=  
Criterion           : Geometric MTF average S&T at 30.0000 cycles per mm 6z2_b wo  
Mode                : Sensitivities *]u
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Sampling            : 2 zm9_[0  
Nominal Criterion   : 0.54403234 xy.di
9  
Test Wavelength     : 0.6328 J ;e/S6l  
L3 VyW8Y  
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Fields: XY Symmetric Angle in degrees ,x.2kb  
#      X-Field      Y-Field       Weight    VDX    VDY    VCX    VCY ="Edt+a)t  
1   0.000E+000   0.000E+000   1.000E+000  0.000  0.000  0.000  0.000 lDd8dT-Q.  
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Sensitivity Analysis: cz6\qSh\,  
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                 |----------------- Minimum ----------------| |----------------- Maximum ----------------| ZR|cZH1}C  
Type                      Value      Criterion        Change          Value      Criterion        Change h4 X>  
Fringe tolerance on surface 1 R8K?!Z  
TFRN   1            -1.00000000     0.54257256    -0.00145977     1.00000000     0.54548607     0.00145374 =>Md>VM  
Change in Focus                :      -0.000000                            0.000000 rdY/QvP0=  
Fringe tolerance on surface 2 zV<vwIUrr  
TFRN   2            -1.00000000     0.54177471    -0.00225762     1.00000000     0.54627463     0.00224230 ^1 P@BRh  
Change in Focus                :       0.000000                            0.000000 s/=.a2\  
Fringe tolerance on surface 3 SA'c}gP  
TFRN   3            -1.00000000     0.54779866     0.00376632     1.00000000     0.54022572    -0.00380662 61}hB>TT:  
Change in Focus                :      -0.000000                            0.000000 |x ~<Dc>0*  
Thickness tolerance on surface 1 |n_es)A  
TTHI   1   3        -0.20000000     0.54321462    -0.00081772     0.20000000     0.54484759     0.00081525 "VfV;)]|w  
Change in Focus                :       0.000000                            0.000000 4qc0QA%  
Thickness tolerance on surface 2 3|FZ!8D  
TTHI   2   3        -0.20000000     0.54478712     0.00075478     0.20000000     0.54327558    -0.00075675 k.dQ;v}  
Change in Focus                :       0.000000                           -0.000000 *z{.9z`  
Decenter X tolerance on surfaces 1 through 3 'J=knjAT  
TEDX   1   3        -0.20000000     0.54401464   -1.7700E-005     0.20000000     0.54401464   -1.7700E-005 KW[Jft  
Change in Focus                :       0.000000                            0.000000 _H(:$=$Q  
Decenter Y tolerance on surfaces 1 through 3 s,2gd'  
TEDY   1   3        -0.20000000     0.54401464   -1.7700E-005     0.20000000     0.54401464   -1.7700E-005 B,]:<1l~  
Change in Focus                :       0.000000                            0.000000 fsxZQ=-PW
 
Tilt X tolerance on surfaces 1 through 3 (degrees) w'-J24>=  
TETX   1   3        -0.20000000     0.54897548     0.00494314     0.20000000     0.54897548     0.00494314 UJX=lh.o  
Change in Focus                :       0.000000                            0.000000 N+[ |"v  
Tilt Y tolerance on surfaces 1 through 3 (degrees) o3oA
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TETY   1   3        -0.20000000     0.54897548     0.00494314     0.20000000     0.54897548     0.00494314 t'F_1P^*
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Change in Focus                :       0.000000                            0.000000 1 iWe&I:  
Decenter X tolerance on surface 1 F|seBBu  
TSDX   1            -0.20000000     0.53999563    -0.00403671     0.20000000     0.53999563    -0.00403671 5%5z@Ka  
Change in Focus                :       0.000000                            0.000000 ; {P"~(S%  
Decenter Y tolerance on surface 1 2'8$
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TSDY   1            -0.20000000     0.53999563    -0.00403671     0.20000000     0.53999563    -0.00403671 O [81nlhS0  
Change in Focus                :       0.000000                            0.000000 7z?rx  
Tilt X tolerance on surface (degrees) 1 Owa]ax5  
TSTX   1            -0.20000000     0.42678383    -0.11724851     0.20000000     0.42678383    -0.11724851 c_33.i"I}  
Change in Focus                :       0.000000                            0.000000 Yiq8>|  
Tilt Y tolerance on surface (degrees) 1 G\S>H  
TSTY   1            -0.20000000     0.42678383    -0.11724851     0.20000000     0.42678383    -0.11724851 {m&8Viq1  
Change in Focus                :       0.000000                            0.000000 yM8<)6=  
Decenter X tolerance on surface 2  A`D^}F6  
TSDX   2            -0.20000000     0.51705427    -0.02697807     0.20000000     0.51705427    -0.02697807 i7m=V T  
Change in Focus                :       0.000000                            0.000000 #O |Z\|n  
Decenter Y tolerance on surface 2 V(Dn!Nz  
TSDY   2            -0.20000000     0.51705427    -0.02697807     0.20000000     0.51705427    -0.02697807 N]k(8K  
Change in Focus                :       0.000000                            0.000000 #78P_{#!  
Tilt X tolerance on surface (degrees) 2 9b0M'x'W5  
TSTX   2            -0.20000000     0.35349910    -0.19053324     0.20000000     0.35349910    -0.19053324 \"r*wa
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Change in Focus                :       0.000000                            0.000000 gmY*}d` 'f  
Tilt Y tolerance on surface (degrees) 2 N!`8-ap\^  
TSTY   2            -0.20000000     0.35349910    -0.19053324     0.20000000     0.35349910    -0.19053324 ;8G( l   
Change in Focus                :       0.000000                            0.000000 =>0+BD  
Decenter X tolerance on surface 3 .skR4f,h  
TSDX   3            -0.20000000     0.53419039    -0.00984195     0.20000000     0.53419039    -0.00984195 NB z3j
  
Change in Focus                :       0.000000                            0.000000 *F
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Decenter Y tolerance on surface 3 nn"Wn2ciS  
TSDY   3            -0.20000000     0.53419039    -0.00984195     0.20000000     0.53419039    -0.00984195 AxN.k  
Change in Focus                :       0.000000                            0.000000 SnhB$DG  
Tilt X tolerance on surface (degrees) 3 ?8d7/KZO  
TSTX   3            -0.20000000     0.42861670    -0.11541563     0.20000000     0.42861670    -0.11541563 bYKyR}e  
Change in Focus                :       0.000000                            0.000000 iuX82z`  
Tilt Y tolerance on surface (degrees) 3 BE;J/  
TSTY   3            -0.20000000     0.42861670    -0.11541563     0.20000000     0.42861670    -0.11541563 4+V+SD  
Change in Focus                :       0.000000                            0.000000 `xhiG9mz~  
Irregularity of surface 1 in fringes >}43xIRRCq  
TIRR   1            -0.20000000     0.50973587    -0.03429647     0.20000000     0.57333868     0.02930634 Cyb-}l  
Change in Focus                :       0.000000                            0.000000 B~_='0Gm[  
Irregularity of surface 2 in fringes ::xH C4tw  
TIRR   2            -0.20000000     0.53400904    -0.01002330     0.20000000     0.55360281     0.00957047 2ja@NT  
Change in Focus                :       0.000000                            0.000000 xz+Y1fYT  
Irregularity of surface 3 in fringes CTbz?Kn  
TIRR   3            -0.20000000     0.58078982     0.03675748     0.20000000     0.49904394    -0.04498840 e$E~@{[1)  
Change in Focus                :       0.000000                            0.000000 T/_JXK>W  
Index tolerance on surface 1 zKi5e+\  
TIND   1            -0.00100000     0.52606778    -0.01796456     0.00100000     0.56121811     0.01718578 Qr/8kWa0C  
Change in Focus                :       0.000000                            0.000000 z_dorDF8`>  
Index tolerance on surface 2 ">n38:?R  
TIND   2            -0.00100000     0.55639086     0.01235852     0.00100000     0.53126361    -0.01276872 &~u=vuX  
Change in Focus                :       0.000000                           -0.000000 L29,Y=n@  
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Worst offenders: pX:FXzYQ  
Type                      Value      Criterion        Change OZF^w[ `w  
TSTY   2            -0.20000000     0.35349910    -0.19053324 +7jr]kP9  
TSTY   2             0.20000000     0.35349910    -0.19053324 )TceNH  
TSTX   2            -0.20000000     0.35349910    -0.19053324 Q}J'S5%  
TSTX   2             0.20000000     0.35349910    -0.19053324 ]to"X7/
 
TSTY   1            -0.20000000     0.42678383    -0.11724851 i4Y_5  
TSTY   1             0.20000000     0.42678383    -0.11724851 0.}Um  
TSTX   1            -0.20000000     0.42678383    -0.11724851 ,_ XDCu @  
TSTX   1             0.20000000     0.42678383    -0.11724851 |EJ&s393&  
TSTY   3            -0.20000000     0.42861670    -0.11541563 VWlOMqL995  
TSTY   3             0.20000000     0.42861670    -0.11541563 s<I[)FQVr  
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Estimated Performance Changes based upon Root-Sum-Square method: qIwI
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Nominal MTF                 :     0.54403234 jhWNMu  
Estimated change            :    -0.36299231 _jw A_  
Estimated MTF               :     0.18104003 8+&] q#W3  
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Compensator Statistics: g& yR-  
Change in back focus: g<[_h(xDeG  
Minimum            :        -0.000000 p%A(
5DE  
Maximum            :         0.000000 !@ml^&hP  
Mean               :        -0.000000 GfAt-huL(  
Standard Deviation :         0.000000 Ojkbv  
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Monte Carlo Analysis: 8@)/a  
Number of trials: 20 kU8V,5  
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Initial Statistics: Normal Distribution 27-<q5q  
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  Trial       Criterion        Change Mj&f7IUO  
      1     0.42804416    -0.11598818 /;M0tP  
Change in Focus                :      -0.400171 R|T_9/#)  
      2     0.54384387    -0.00018847 %C= {\]-2~  
Change in Focus                :       1.018470 jfyV9)  
      3     0.44510003    -0.09893230 D?rQQxb  
Change in Focus                :      -0.601922 Y8I$JBO  
      4     0.18154684    -0.36248550 6&=xu|M<x=  
Change in Focus                :       0.920681 :\Z;FA@g(g  
      5     0.28665820    -0.25737414 h:[PO6GdX  
Change in Focus                :       1.253875 D-.XSIEMu  
      6     0.21263372    -0.33139862 b|T}mn  
Change in Focus                :      -0.903878 eR(PY{  
      7     0.40051424    -0.14351809 Q)}sX6TB  
Change in Focus                :      -1.354815 . `lcxC  
      8     0.48754161    -0.05649072 I"E5XVC);  
Change in Focus                :       0.215922 tw8@&8"  
      9     0.40357468    -0.14045766 tr2@{xb  
Change in Focus                :       0.281783 #F5O>9hA  
     10     0.26315315    -0.28087919 jxL5L[  
Change in Focus                :      -1.048393 >2gemTy  
     11     0.26120585    -0.28282649  Tx35~Z`0  
Change in Focus                :       1.017611 [{_JO+)+n  
     12     0.24033815    -0.30369419 QQKvy0?1  
Change in Focus                :      -0.109292 ZD1UMB0$4  
     13     0.37164046    -0.17239188 fmH$1C<  
Change in Focus                :      -0.692430 @b2{'#9]}  
     14     0.48597489    -0.05805744 8#
S|jBV  
Change in Focus                :      -0.662040 tFvti5  
     15     0.21462327    -0.32940907 TL+a_]3@  
Change in Focus                :       1.611296 __""!Yz  
     16     0.43378226    -0.11025008 F;jl0)fBR=  
Change in Focus                :      -0.640081 XpWqL9s_E  
     17     0.39321881    -0.15081353 {4&G\2<^^  
Change in Focus                :       0.914906 F]3iL^v  
     18     0.20692530    -0.33710703 |jW82L+!N%  
Change in Focus                :       0.801607 pB{Q
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     19     0.51374068    -0.03029165 JoA^9AYhR  
Change in Focus                :       0.947293 5tR<aIf  
     20     0.38013374    -0.16389860 /reSU 2  
Change in Focus                :       0.667010 .:c^G[CQ^9  
.eW}@1+[;  
Number of traceable Monte Carlo files generated: 20 |_aE~_  
8ON$M=Ze$  
Nominal     0.54403234 `9eE139V='  
Best        0.54384387    Trial     2 wo84V!"A  
Worst       0.18154684    Trial     4 H$Fz{[[u  
Mean        0.35770970 aYe,5
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Std Dev     0.11156454 0X#tt`;  
gOa'o<  
z>NRvx0  
Compensator Statistics: GAbX.9[V  
Change in back focus: Os9xZ  
Minimum            :        -1.354815 zl46E~"]x  
Maximum            :         1.611296 !l@IG C  
Mean               :         0.161872 DqrS5!C  
Standard Deviation :         0.869664 NFPW#-TF  
O'U0Y8HN  
90% >       0.20977951               L~Epd.,Dt  
80% >       0.22748071               r#rQ3&Vn  
50% >       0.38667627               Y1
txI  
20% >       0.46553746               "$PbpY  
10% >       0.50064115                Afo(! v  
!Pt|Hk dr  
End of Run. ;JA2n\iP,  
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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 p+#J;.  

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 S1wt>}w0$  
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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                 :D}x
T]  
80% >       0.22748071                  nsij
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50% >       0.38667627                 ;$&&tEh)  
20% >       0.46553746                 Yq4_ss'nB  
10% >       0.50064115 M' "S:  
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最后这个数值是MTF值呢，还是MTF的公差？ lLxKC7b  
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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？？？   $TtCVR  
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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  : |F-_YR  
90% >       0.20977951                 ZtlF]k:MV  
80% >       0.22748071                 Q[;!z1ur  
50% >       0.38667627                 o )GNV  
20% >       0.46553746                 oil s;*q  
10% >       0.50064115 X<Rh-1$8F  
....... UtIwrR[  

282 m^ 2  
Dp8YzWL2^  
这些数值都是MTF值

Criterion           : Geometric MTF average S&T at 30.0000 cycles per mm   KV k 36;$  
Mode                : Sensitivities /0
s1q  
Sampling            : 2 kG[u$[B  
Nominal Criterion   : 0.54403234 9w[7X"#n  
Test Wavelength     : 0.6328 AFGWlC#`  
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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？ d&&^_0O  
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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