[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 B_1u<00kg  
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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 /R?uxhV  
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图片:2.jpg

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然后运行分析的结果如下： tG&B D\  
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Analysis of Tolerances EnAw8Gm*  
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File : E:\光学设计资料\zemax练习\f500.ZMX KPrxw }P  
Title: l$@lk?dc  
Date : TUE JUN 21 2011 5,fzB~$TX(  
`2+52q<FO  
Units are Millimeters. JB}h}nb  
All changes are computed using linear differences. e;\c=J,eE  
Qc/J"<Lx  
Paraxial Focus compensation only. <T9m.:l  
Unk+@$E&  
WARNING: Solves should be removed prior to tolerancing. `&
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z<XS"4l?W  
Mnemonics: dg<fUQ  
TFRN: Tolerance on curvature in fringes. _JB3+0@  
TTHI: Tolerance on thickness. %8}w!2D S  
TSDX: Tolerance on surface decentering in x. =,9'O/br  
TSDY: Tolerance on surface decentering in y. 3mpjSL  
TSTX: Tolerance on surface tilt in x (degrees). $l0w{m!P  
TSTY: Tolerance on surface tilt in y (degrees). 2sq<"TlQXI  
TIRR: Tolerance on irregularity (fringes). M6n.uho/  
TIND: Tolerance on Nd index of refraction. ~0:c{v;4  
TEDX: Tolerance on element decentering in x. cViCWc2  
TEDY: Tolerance on element decentering in y. WVFy ZpB  
TETX: Tolerance on element tilt in x (degrees). A}O9e  
TETY: Tolerance on element tilt in y (degrees). U{m:{'np(H  
;trR'~  
WARNING: RAY AIMING IS OFF. Very loose tolerances may not be computed accurately. Nzt1JHRS  
o^J&c_U\3'  
WARNING: Boundary constraints on compensators will be ignored. kv2:rmv  
o$;x[US  
Criterion           : Geometric MTF average S&T at 30.0000 cycles per mm ".=EAXVU  
Mode                : Sensitivities m\Nc}P_"p  
Sampling            : 2 A
2 )%+  
Nominal Criterion   : 0.54403234 0}!lN
{m?  
Test Wavelength     : 0.6328 b?,y%D)'  
~KvCb3~X  
F*u;'K  
Fields: XY Symmetric Angle in degrees S6I8zk)Z4  
#      X-Field      Y-Field       Weight    VDX    VDY    VCX    VCY "Y6mM_flq  
1   0.000E+000   0.000E+000   1.000E+000  0.000  0.000  0.000  0.000 r6<}S(  
m5*RB1  
Sensitivity Analysis:  }P#gXG  
 su$juI{  
                 |----------------- Minimum ----------------| |----------------- Maximum ----------------| UNae&Zir  
Type                      Value      Criterion        Change          Value      Criterion        Change X8TZePh  
Fringe tolerance on surface 1 v'=APl+_  
TFRN   1            -1.00000000     0.54257256    -0.00145977     1.00000000     0.54548607     0.00145374  73X]|fy  
Change in Focus                :      -0.000000                            0.000000 9IMcp~zX  
Fringe tolerance on surface 2 $fO*229As  
TFRN   2            -1.00000000     0.54177471    -0.00225762     1.00000000     0.54627463     0.00224230 D=$<Ex^p  
Change in Focus                :       0.000000                            0.000000 wXnt3)e  
Fringe tolerance on surface 3 Dc2eY.  
TFRN   3            -1.00000000     0.54779866     0.00376632     1.00000000     0.54022572    -0.00380662 oB@C-(M  
Change in Focus                :      -0.000000                            0.000000 VdgPb (  
Thickness tolerance on surface 1 hJM0A3(Cm  
TTHI   1   3        -0.20000000     0.54321462    -0.00081772     0.20000000     0.54484759     0.00081525 wH.'E
C  
Change in Focus                :       0.000000                            0.000000 9#7zjrB  
Thickness tolerance on surface 2 >F v8 -  
TTHI   2   3        -0.20000000     0.54478712     0.00075478     0.20000000     0.54327558    -0.00075675 6fiJ' j@  
Change in Focus                :       0.000000                           -0.000000 kp|reKM/  
Decenter X tolerance on surfaces 1 through 3 <Lt$qV-#  
TEDX   1   3        -0.20000000     0.54401464   -1.7700E-005     0.20000000     0.54401464   -1.7700E-005 #,Y}  
Change in Focus                :       0.000000                            0.000000 C}Q2UK-:  
Decenter Y tolerance on surfaces 1 through 3 qZ.\GHS  
TEDY   1   3        -0.20000000     0.54401464   -1.7700E-005     0.20000000     0.54401464   -1.7700E-005 L $
~Id  
Change in Focus                :       0.000000                            0.000000 l/5/|UE9  
Tilt X tolerance on surfaces 1 through 3 (degrees) S/|8'x{<  
TETX   1   3        -0.20000000     0.54897548     0.00494314     0.20000000     0.54897548     0.00494314 bYfcn]N  
Change in Focus                :       0.000000                            0.000000 Sy
b:i(Y  
Tilt Y tolerance on surfaces 1 through 3 (degrees) idq= US  
TETY   1   3        -0.20000000     0.54897548     0.00494314     0.20000000     0.54897548     0.00494314 YH
9BJ  
Change in Focus                :       0.000000                            0.000000 pWqahrWh  
Decenter X tolerance on surface 1 ~F-,Q_|-  
TSDX   1            -0.20000000     0.53999563    -0.00403671     0.20000000     0.53999563    -0.00403671 Fei$94a  
Change in Focus                :       0.000000                            0.000000 L[^e<I  
Decenter Y tolerance on surface 1 3ba"[C|  
TSDY   1            -0.20000000     0.53999563    -0.00403671     0.20000000     0.53999563    -0.00403671 (~~=<0S  
Change in Focus                :       0.000000                            0.000000 N'StT$(  
Tilt X tolerance on surface (degrees) 1 6=FuH@Q&  
TSTX   1            -0.20000000     0.42678383    -0.11724851     0.20000000     0.42678383    -0.11724851 h?b{{  
Change in Focus                :       0.000000                            0.000000 R;%iu0  
Tilt Y tolerance on surface (degrees) 1 P-C_sj A7  
TSTY   1            -0.20000000     0.42678383    -0.11724851     0.20000000     0.42678383    -0.11724851 sQkP@Y  
Change in Focus                :       0.000000                            0.000000 U"Y$7
~  
Decenter X tolerance on surface 2 Tr8+E;;  
TSDX   2            -0.20000000     0.51705427    -0.02697807     0.20000000     0.51705427    -0.02697807 7?
4>'  
Change in Focus                :       0.000000                            0.000000 2WoB;=  
Decenter Y tolerance on surface 2 8{RiaF8  
TSDY   2            -0.20000000     0.51705427    -0.02697807     0.20000000     0.51705427    -0.02697807 KK?}`o  
Change in Focus                :       0.000000                            0.000000 [":x   
Tilt X tolerance on surface (degrees) 2 5R4 dN=L*1  
TSTX   2            -0.20000000     0.35349910    -0.19053324     0.20000000     0.35349910    -0.19053324 ZO,]h9?4  
Change in Focus                :       0.000000                            0.000000 Ugn"w E  
Tilt Y tolerance on surface (degrees) 2 KLk37IY2\  
TSTY   2            -0.20000000     0.35349910    -0.19053324     0.20000000     0.35349910    -0.19053324 $I'ES#8P6  
Change in Focus                :       0.000000                            0.000000 cG<?AR?wDT  
Decenter X tolerance on surface 3 1DX=\BWp  
TSDX   3            -0.20000000     0.53419039    -0.00984195     0.20000000     0.53419039    -0.00984195 c09uCito  
Change in Focus                :       0.000000                            0.000000 q#Bdq8  
Decenter Y tolerance on surface 3 xc!"?&\*  
TSDY   3            -0.20000000     0.53419039    -0.00984195     0.20000000     0.53419039    -0.00984195 ;tHF$1!J  
Change in Focus                :       0.000000                            0.000000 /1Eg6hf9B  
Tilt X tolerance on surface (degrees) 3 C$P3&k#W  
TSTX   3            -0.20000000     0.42861670    -0.11541563     0.20000000     0.42861670    -0.11541563 w/&#UsEIr  
Change in Focus                :       0.000000                            0.000000 )9*WmFc+#  
Tilt Y tolerance on surface (degrees) 3 V\ |b#?KL  
TSTY   3            -0.20000000     0.42861670    -0.11541563     0.20000000     0.42861670    -0.11541563 B>R6j}rh'k  
Change in Focus                :       0.000000                            0.000000 |Qm 7x[i  
Irregularity of surface 1 in fringes ?h{&  
TIRR   1            -0.20000000     0.50973587    -0.03429647     0.20000000     0.57333868     0.02930634 <
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Change in Focus                :       0.000000                            0.000000 ^71sIf;+
 
Irregularity of surface 2 in fringes <v\
|@@X  
TIRR   2            -0.20000000     0.53400904    -0.01002330     0.20000000     0.55360281     0.00957047 "m!Cl-+u  
Change in Focus                :       0.000000                            0.000000 UZyo:*yB  
Irregularity of surface 3 in fringes wDsEx!\#  
TIRR   3            -0.20000000     0.58078982     0.03675748     0.20000000     0.49904394    -0.04498840 `0L!F"W  
Change in Focus                :       0.000000                            0.000000 ,QK>e;:Be  
Index tolerance on surface 1 n7S[ F3  
TIND   1            -0.00100000     0.52606778    -0.01796456     0.00100000     0.56121811     0.01718578 d+_qBp  
Change in Focus                :       0.000000                            0.000000 %l>^q`p  
Index tolerance on surface 2 qwN-VCj  
TIND   2            -0.00100000     0.55639086     0.01235852     0.00100000     0.53126361    -0.01276872 xHf l>C'  
Change in Focus                :       0.000000                           -0.000000 'p<(6*,"  
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Worst offenders: 4FYws5]$  
Type                      Value      Criterion        Change s>kzt1,x  
TSTY   2            -0.20000000     0.35349910    -0.19053324 q|S }5  
TSTY   2             0.20000000     0.35349910    -0.19053324 NJ|8##Z>  
TSTX   2            -0.20000000     0.35349910    -0.19053324 km *$;Nli  
TSTX   2             0.20000000     0.35349910    -0.19053324 8 }-"&-X  
TSTY   1            -0.20000000     0.42678383    -0.11724851 6JJ%`Uojh  
TSTY   1             0.20000000     0.42678383    -0.11724851 }%%| '8  
TSTX   1            -0.20000000     0.42678383    -0.11724851 4YKb~1qkk  
TSTX   1             0.20000000     0.42678383    -0.11724851 "]sr4Jg=  
TSTY   3            -0.20000000     0.42861670    -0.11541563 3o z]  
TSTY   3             0.20000000     0.42861670    -0.11541563 _Ab|<!a/R  
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Estimated Performance Changes based upon Root-Sum-Square method: $} ~:x_[  
Nominal MTF                 :     0.54403234 K(hqDif*6  
Estimated change            :    -0.36299231 -\>Xtix^-c  
Estimated MTF               :     0.18104003 NKRNEq!  
NO'-HKHj  
Compensator Statistics: BwbvZfV|  
Change in back focus: u{HB5QqK  
Minimum            :        -0.000000 9'}m797I'  
Maximum            :         0.000000 p 5P<3(  
Mean               :        -0.000000 *vht</?J  
Standard Deviation :         0.000000 D{c`H}/`  
MwiT1sB~  
Monte Carlo Analysis: 0rF{"HM~  
Number of trials: 20 ~/QzL.S;p  
=*}|y;I  
Initial Statistics: Normal Distribution JPmW0wM  
HuG|BjP  
  Trial       Criterion        Change )wmXicURC  
      1     0.42804416    -0.11598818 x#U?~6.6  
Change in Focus                :      -0.400171 ]GRPxh  
      2     0.54384387    -0.00018847 k{uc%6s  
Change in Focus                :       1.018470 [9X1;bO#f  
      3     0.44510003    -0.09893230 \!`*F:7]-  
Change in Focus                :      -0.601922 +[:}<^p?cG  
      4     0.18154684    -0.36248550 /,wG$b+  
Change in Focus                :       0.920681 xCGvLvFn  
      5     0.28665820    -0.25737414 evq*&.6\  
Change in Focus                :       1.253875 p^NYJV  
      6     0.21263372    -0.33139862 Wo\NX05-?  
Change in Focus                :      -0.903878 iYR8sg[' #  
      7     0.40051424    -0.14351809 bq]af.o*  
Change in Focus                :      -1.354815 F?3a22Zg#  
      8     0.48754161    -0.05649072 8MV=?  
Change in Focus                :       0.215922 D}Z].c@E  
      9     0.40357468    -0.14045766 't2"CPZ  
Change in Focus                :       0.281783 FSC74N/  
     10     0.26315315    -0.28087919 [/6IEt3}B  
Change in Focus                :      -1.048393 hK?uGt d?  
     11     0.26120585    -0.28282649 Xrc0RWXB8  
Change in Focus                :       1.017611 A6= Um%T  
     12     0.24033815    -0.30369419 hK3?m.>"g  
Change in Focus                :      -0.109292 1:XT r  
     13     0.37164046    -0.17239188 NJwcb=*  
Change in Focus                :      -0.692430 Jk 0;<2j  
     14     0.48597489    -0.05805744 ^|(F|Z  
Change in Focus                :      -0.662040 Z#%4QIz?  
     15     0.21462327    -0.32940907 !Hxx6/  
Change in Focus                :       1.611296 ',v -&1R  
     16     0.43378226    -0.11025008 Kb#py
6  
Change in Focus                :      -0.640081 ]&jXD=a"  
     17     0.39321881    -0.15081353 `#E1FB2M  
Change in Focus                :       0.914906 PohG y  
     18     0.20692530    -0.33710703 9H`Q |7g(5  
Change in Focus                :       0.801607 fMy7pXa_  
     19     0.51374068    -0.03029165 )L<NW{  
Change in Focus                :       0.947293 PH^AT<
U:T  
     20     0.38013374    -0.16389860 9Y3_.qa(.  
Change in Focus                :       0.667010 glm29hF  
M1-n  
Number of traceable Monte Carlo files generated: 20 r1}YN<+,s  
ez@`&cJ7  
Nominal     0.54403234 H_un3x1  
Best        0.54384387    Trial     2 GFB(c  
Worst       0.18154684    Trial     4 [8v v[n/  
Mean        0.35770970 )k&<D*5s  
Std Dev     0.11156454 mR)Xq=  
[2"a~o\  
(Z fY/  
Compensator Statistics: F2saGpGH  
Change in back focus: TmxhP nJ~  
Minimum            :        -1.354815 c_"]AhV~Mg  
Maximum            :         1.611296 V>>"nf,YO  
Mean               :         0.161872 |Ah'KpL8W  
Standard Deviation :         0.869664 ?Id3#+-O  
@FKm
_q  
90% >       0.20977951               W1dpKv  
80% >       0.22748071               mmE\=i~  
50% >       0.38667627               g 4G&  
20% >       0.46553746               <lopk('7  
10% >       0.50064115                .B_LQ;0:   
;'~U5Po8  
End of Run. ]%>7OH'  
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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 M_lQ^7/  

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 4jbqV  
[#hpWNez(>  
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                 ^EtBo7^t  
80% >       0.22748071                 ?|,dHqh{nM  
50% >       0.38667627                 4
gD;XNrV  
20% >       0.46553746                 0ndk=V  
10% >       0.50064115 @G'&7-(h*  
p}}pq~EH/  
最后这个数值是MTF值呢，还是MTF的公差？ 0SS,fs<w3  
9d kuvk}:  
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？？？   =f~8"j  
qe
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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  : x=I|O;"><  
90% >       0.20977951                 CT0 ~  
80% >       0.22748071                 wZnv*t_  
50% >       0.38667627                 k.n-JS  
20% >       0.46553746                 z)_h"y?H{%  
10% >       0.50064115 }7HR<%<7  
....... 0ZAT;eaB  

b#[EkI 0@  
5H^"  
这些数值都是MTF值

Criterion           : Geometric MTF average S&T at 30.0000 cycles per mm   ;r3Xh)k;  
Mode                : Sensitivities 9#MY(Hr  
Sampling            : 2 oYR OGU  
Nominal Criterion   : 0.54403234 _O;2.M%@  
Test Wavelength     : 0.6328 9g~"Y[ ]  
:406Oa  
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？ ~]V}wZt>h  
]9PQKC2&  
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