[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 z'k@$@:0XD  
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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 7JLjA\k
  
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图片:2.jpg

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然后运行分析的结果如下： p+xjYU4^C  
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Analysis of Tolerances g6;a2  
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File : E:\光学设计资料\zemax练习\f500.ZMX c(lG_"q6  
Title: ~s) `y2Y  
Date : TUE JUN 21 2011 &MP +  
WCwM+D  
Units are Millimeters. *o#P)H  
All changes are computed using linear differences.

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Paraxial Focus compensation only. ac/<N%  
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WARNING: Solves should be removed prior to tolerancing. 7DWHADr  
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Mnemonics: hixG/%aO  
TFRN: Tolerance on curvature in fringes. je5GZFQw  
TTHI: Tolerance on thickness.
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TSDX: Tolerance on surface decentering in x. ITBa ^P  
TSDY: Tolerance on surface decentering in y. =.t3|5U8  
TSTX: Tolerance on surface tilt in x (degrees). pLsWy&G  
TSTY: Tolerance on surface tilt in y (degrees). [Qn$i/`J  
TIRR: Tolerance on irregularity (fringes). Ydh+iLjhx  
TIND: Tolerance on Nd index of refraction. h0zv@,u  
TEDX: Tolerance on element decentering in x. ]Jx_bs
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TEDY: Tolerance on element decentering in y. M IR))j;  
TETX: Tolerance on element tilt in x (degrees). kZ<"hsh,Y'  
TETY: Tolerance on element tilt in y (degrees). V})b.\"F  
p JM&R<i:  
WARNING: RAY AIMING IS OFF. Very loose tolerances may not be computed accurately. ]"VxEpqhM  
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WARNING: Boundary constraints on compensators will be ignored. :o}LJc)|  
rFG_CC2  
Criterion           : Geometric MTF average S&T at 30.0000 cycles per mm }"6 PM)s  
Mode                : Sensitivities 9=p/'d8  
Sampling            : 2 ,2`F
SL%J  
Nominal Criterion   : 0.54403234 1t< nm)  
Test Wavelength     : 0.6328 #A9rI;"XI  
9"b =W@  
s=83a{#K  
Fields: XY Symmetric Angle in degrees xA]}/*  
#      X-Field      Y-Field       Weight    VDX    VDY    VCX    VCY k/2TvEV3=  
1   0.000E+000   0.000E+000   1.000E+000  0.000  0.000  0.000  0.000 2#`9OLu8X  
n>?eTlO3  
Sensitivity Analysis: %p8#pt\$7  
!A&>Eeai  
                 |----------------- Minimum ----------------| |----------------- Maximum ----------------| 9?4:},FRmE  
Type                      Value      Criterion        Change          Value      Criterion        Change _REAzxeS  
Fringe tolerance on surface 1 P,={ C6*  
TFRN   1            -1.00000000     0.54257256    -0.00145977     1.00000000     0.54548607     0.00145374 Y3?)*kz%  
Change in Focus                :      -0.000000                            0.000000 xw~3x*{  
Fringe tolerance on surface 2 L_Lhmtm}m  
TFRN   2            -1.00000000     0.54177471    -0.00225762     1.00000000     0.54627463     0.00224230 I9O%/^5^[w  
Change in Focus                :       0.000000                            0.000000 -~WDv[[  
Fringe tolerance on surface 3 (Kb_/  
TFRN   3            -1.00000000     0.54779866     0.00376632     1.00000000     0.54022572    -0.00380662 p{oc}dWin  
Change in Focus                :      -0.000000                            0.000000
wlw`%z-B2  
Thickness tolerance on surface 1 YzeNr*  
TTHI   1   3        -0.20000000     0.54321462    -0.00081772     0.20000000     0.54484759     0.00081525 +vO;J  
Change in Focus                :       0.000000                            0.000000 ((mR'A|`  
Thickness tolerance on surface 2 1Y(NxC0P=g  
TTHI   2   3        -0.20000000     0.54478712     0.00075478     0.20000000     0.54327558    -0.00075675 *8I &|)x  
Change in Focus                :       0.000000                           -0.000000
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Decenter X tolerance on surfaces 1 through 3 r Zg(%6@  
TEDX   1   3        -0.20000000     0.54401464   -1.7700E-005     0.20000000     0.54401464   -1.7700E-005 f7oJ6'K  
Change in Focus                :       0.000000                            0.000000 l$g \t]  
Decenter Y tolerance on surfaces 1 through 3  -wQ@z6R  
TEDY   1   3        -0.20000000     0.54401464   -1.7700E-005     0.20000000     0.54401464   -1.7700E-005 {Xv0=P  
Change in Focus                :       0.000000                            0.000000 5LJ0V  
Tilt X tolerance on surfaces 1 through 3 (degrees) /xw}]Fa5  
TETX   1   3        -0.20000000     0.54897548     0.00494314     0.20000000     0.54897548     0.00494314 u{%dm5  
Change in Focus                :       0.000000                            0.000000 >h{)7Hv  
Tilt Y tolerance on surfaces 1 through 3 (degrees) /<T3^/ '  
TETY   1   3        -0.20000000     0.54897548     0.00494314     0.20000000     0.54897548     0.00494314 (e_l1O?  
Change in Focus                :       0.000000                            0.000000 !YENJJ  
Decenter X tolerance on surface 1 w,eW?b  
TSDX   1            -0.20000000     0.53999563    -0.00403671     0.20000000     0.53999563    -0.00403671 );=0cnr3  
Change in Focus                :       0.000000                            0.000000 ^:Fj+d  
Decenter Y tolerance on surface 1 H_>9'(  
TSDY   1            -0.20000000     0.53999563    -0.00403671     0.20000000     0.53999563    -0.00403671 ,C}s8|@k  
Change in Focus                :       0.000000                            0.000000 h8hyQd$!  
Tilt X tolerance on surface (degrees) 1 Ff&kK5}q  
TSTX   1            -0.20000000     0.42678383    -0.11724851     0.20000000     0.42678383    -0.11724851 *~Sv\L  
Change in Focus                :       0.000000                            0.000000 }0AoV&75  
Tilt Y tolerance on surface (degrees) 1 \%|%C  
TSTY   1            -0.20000000     0.42678383    -0.11724851     0.20000000     0.42678383    -0.11724851 g<g$c<sm  
Change in Focus                :       0.000000                            0.000000 3#N`n |UgC  
Decenter X tolerance on surface 2 PpezWo)9  
TSDX   2            -0.20000000     0.51705427    -0.02697807     0.20000000     0.51705427    -0.02697807 aI_[h v  
Change in Focus                :       0.000000                            0.000000 *NCkC ~4  
Decenter Y tolerance on surface 2 dry>TXG*  
TSDY   2            -0.20000000     0.51705427    -0.02697807     0.20000000     0.51705427    -0.02697807 KtD XB>  
Change in Focus                :       0.000000                            0.000000 qijQRxS  
Tilt X tolerance on surface (degrees) 2 #MUY!  
TSTX   2            -0.20000000     0.35349910    -0.19053324     0.20000000     0.35349910    -0.19053324 7\[)5j  
Change in Focus                :       0.000000                            0.000000 xv~Sk2Z+d  
Tilt Y tolerance on surface (degrees) 2 *>E_lWW.  
TSTY   2            -0.20000000     0.35349910    -0.19053324     0.20000000     0.35349910    -0.19053324 6 l7iX]  
Change in Focus                :       0.000000                            0.000000 tP4z#0r2  
Decenter X tolerance on surface 3 G>,43S!<  
TSDX   3            -0.20000000     0.53419039    -0.00984195     0.20000000     0.53419039    -0.00984195 !p!^[/9"c  
Change in Focus                :       0.000000                            0.000000 [,sm]/Xlc  
Decenter Y tolerance on surface 3 6o&ZS @  
TSDY   3            -0.20000000     0.53419039    -0.00984195     0.20000000     0.53419039    -0.00984195 }h1y^fuGi  
Change in Focus                :       0.000000                            0.000000 $V,ZH* g  
Tilt X tolerance on surface (degrees) 3 ]DjnzClx  
TSTX   3            -0.20000000     0.42861670    -0.11541563     0.20000000     0.42861670    -0.11541563 <RuLIu  
Change in Focus                :       0.000000                            0.000000 SA%uGkm:e  
Tilt Y tolerance on surface (degrees) 3 m2[]`Ir^@  
TSTY   3            -0.20000000     0.42861670    -0.11541563     0.20000000     0.42861670    -0.11541563 L [&|<<c  
Change in Focus                :       0.000000                            0.000000 jwmPy)X|s\  
Irregularity of surface 1 in fringes w_#C8}2  
TIRR   1            -0.20000000     0.50973587    -0.03429647     0.20000000     0.57333868     0.02930634 >!
bw8lVV  
Change in Focus                :       0.000000                            0.000000 SvQ!n4 $  
Irregularity of surface 2 in fringes :QIf0*.O  
TIRR   2            -0.20000000     0.53400904    -0.01002330     0.20000000     0.55360281     0.00957047 Vp&"[rC_z  
Change in Focus                :       0.000000                            0.000000 _6-N+FI  
Irregularity of surface 3 in fringes S4VM(~,o  
TIRR   3            -0.20000000     0.58078982     0.03675748     0.20000000     0.49904394    -0.04498840 wizLA0W  
Change in Focus                :       0.000000                            0.000000 X}g"_wN,g>  
Index tolerance on surface 1 X3'd~!a)  
TIND   1            -0.00100000     0.52606778    -0.01796456     0.00100000     0.56121811     0.01718578 >?[?W|k7V  
Change in Focus                :       0.000000                            0.000000 [*1:?mD$  
Index tolerance on surface 2 ;:/C.%d  
TIND   2            -0.00100000     0.55639086     0.01235852     0.00100000     0.53126361    -0.01276872 Zi{vEI]  
Change in Focus                :       0.000000                           -0.000000 y+h/jEbM</  
sKC(xO@L;`  
Worst offenders: }kSP p  
Type                      Value      Criterion        Change 80K"u[  
TSTY   2            -0.20000000     0.35349910    -0.19053324 %k @4}M>  
TSTY   2             0.20000000     0.35349910    -0.19053324 JqV}$E"M2  
TSTX   2            -0.20000000     0.35349910    -0.19053324 {01^xn.  
TSTX   2             0.20000000     0.35349910    -0.19053324 !m8T< LtMl  
TSTY   1            -0.20000000     0.42678383    -0.11724851 kn+@)3W:*  
TSTY   1             0.20000000     0.42678383    -0.11724851 'EC0|IT)c  
TSTX   1            -0.20000000     0.42678383    -0.11724851 |lN=q44I  
TSTX   1             0.20000000     0.42678383    -0.11724851 ?(M$r\\  
TSTY   3            -0.20000000     0.42861670    -0.11541563 Y>x3`f]  
TSTY   3             0.20000000     0.42861670    -0.11541563 oiOu169]  
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Estimated Performance Changes based upon Root-Sum-Square method: Vi#[kn'
 
Nominal MTF                 :     0.54403234 poy_?7G  
Estimated change            :    -0.36299231 A<IV"bo  
Estimated MTF               :     0.18104003 WO$8j2!~#  
a:KL{e[  
Compensator Statistics: g){gF(  
Change in back focus: 4lI&y<F  
Minimum            :        -0.000000 NR"C@3kD]o  
Maximum            :         0.000000 A@Cvx7X  
Mean               :        -0.000000 r`i.h ^2De  
Standard Deviation :         0.000000 A4/gVi|  
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Monte Carlo Analysis: Z/q'^PB p  
Number of trials: 20 >M^:x-mib  
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Initial Statistics: Normal Distribution {vk%&{D0)  
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  Trial       Criterion        Change eQ,VK`7X  
      1     0.42804416    -0.11598818 oJ|m/i)  
Change in Focus                :      -0.400171 WR_B:%W.  
      2     0.54384387    -0.00018847 _&[-< cu  
Change in Focus                :       1.018470 }!"Cvu  
      3     0.44510003    -0.09893230 Oj8D+sC{  
Change in Focus                :      -0.601922 Gp=V%w\FDW  
      4     0.18154684    -0.36248550 8! /ue.T  
Change in Focus                :       0.920681 ^4xl4nbx  
      5     0.28665820    -0.25737414 0}M'>  
Change in Focus                :       1.253875 2InM(p7j~K  
      6     0.21263372    -0.33139862 fKO@Q
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Change in Focus                :      -0.903878 ?Zb3M  
      7     0.40051424    -0.14351809 S5r.so
 
Change in Focus                :      -1.354815
j
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      8     0.48754161    -0.05649072 BU|)lU5)z  
Change in Focus                :       0.215922 MRT<hB  
      9     0.40357468    -0.14045766 J+wnrGoK  
Change in Focus                :       0.281783 b5?kgY  
     10     0.26315315    -0.28087919 fcy4?SQ.<i  
Change in Focus                :      -1.048393 ;zd.KaS  
     11     0.26120585    -0.28282649 \+&)9 !K  
Change in Focus                :       1.017611 5mZwg(si  
     12     0.24033815    -0.30369419 'j!n   
Change in Focus                :      -0.109292 s[VYd:}se  
     13     0.37164046    -0.17239188 !_oR/)  
Change in Focus                :      -0.692430 J&B5Ll  
     14     0.48597489    -0.05805744 @z:E]O}  
Change in Focus                :      -0.662040 &8I*N6p:%/  
     15     0.21462327    -0.32940907 ,$U~<Zd  
Change in Focus                :       1.611296 uo;m  
     16     0.43378226    -0.11025008 W$W w/mcl+  
Change in Focus                :      -0.640081 Tl#2w=  
     17     0.39321881    -0.15081353 wk'&n^_br  
Change in Focus                :       0.914906 U }I#;*F  
     18     0.20692530    -0.33710703 2B
5Ez,'#x  
Change in Focus                :       0.801607 }}bMq.Q'  
     19     0.51374068    -0.03029165 u|k_OUTq  
Change in Focus                :       0.947293 B ]sVlbt  
     20     0.38013374    -0.16389860 oE2VJKs<B  
Change in Focus                :       0.667010 gSf>+|  
74&{GCL  
Number of traceable Monte Carlo files generated: 20 4~8-^^  
r]]:/pw?t  
Nominal     0.54403234 HVzkS|^F  
Best        0.54384387    Trial     2 F{_,IQ]U  
Worst       0.18154684    Trial     4 [.w`r>kZI  
Mean        0.35770970 F!w|5,)  
Std Dev     0.11156454 ^/#8 "  
0uIBaW3
s  
3{$>-d  
Compensator Statistics: 7]~|dc(  
Change in back focus: y\[q2M<  
Minimum            :        -1.354815 m"6K_4r]  
Maximum            :         1.611296 @ZrNV*&<  
Mean               :         0.161872 Wtp=1  
Standard Deviation :         0.869664 `$FB[Z} &  
j`K0D65  
90% >       0.20977951               w,_LC)9  
80% >       0.22748071               }:QoYNq  
50% >       0.38667627               ",#Ug"|2  
20% >       0.46553746               F&B E+b/#  
10% >       0.50064115                W|(<z'S  
}*O8
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End of Run. =k;X}/  
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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 /LtbmV  

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 3#GIZL}!x  
nZG zez  
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                 n</Rd=  
80% >       0.22748071                 gv i!|!M=  
50% >       0.38667627                 "v0SvV<7  
20% >       0.46553746                  ':DL  
10% >       0.50064115 :"b:uQ  
Eb CK9  
最后这个数值是MTF值呢，还是MTF的公差？ 2Uu!_n}tNF  
:@@m'zF<;  
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？？？   mX?t|:[b  
<'BsQHI  
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  : 4Tx.|  
90% >       0.20977951                 .~q>e*8AH  
80% >       0.22748071                 Np+pJc1  
50% >       0.38667627                 475g-t2"@  
20% >       0.46553746                 V?p`rrj@  
10% >       0.50064115 ?[Ma" l>  
....... \=&Z_6Mu  

rR#wbDr5  
>J)4e~9EJ2  
这些数值都是MTF值

Criterion           : Geometric MTF average S&T at 30.0000 cycles per mm   `VDvxl@1  
Mode                : Sensitivities nNnfcA&W  
Sampling            : 2 eX!yIqAR  
Nominal Criterion   : 0.54403234 wrK@1F9!  
Test Wavelength     : 0.6328 zqZ/z>Gf  
~C
3Ada@4  
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？ HMmVfGp]  
W`TSR?4~t?  
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