[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 *9"
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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 !^Mk5E(  
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图片:2.jpg

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然后运行分析的结果如下： 3nfw:.  
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Analysis of Tolerances ([loWr}QR  
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File : E:\光学设计资料\zemax练习\f500.ZMX \>0F{-cR$  
Title: !"u) `I2  
Date : TUE JUN 21 2011 ># FO0R  
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Units are Millimeters. lQs|B '  
All changes are computed using linear differences. 3}::"X  
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Paraxial Focus compensation only. H \$04vkR  
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WARNING: Solves should be removed prior to tolerancing. ayfZ>x{s*  
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Mnemonics: ?>lvV+3^`  
TFRN: Tolerance on curvature in fringes. Wc4K?3 ZM  
TTHI: Tolerance on thickness. 8
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TSDX: Tolerance on surface decentering in x. 8Rq+eOP=S  
TSDY: Tolerance on surface decentering in y. jEBZ"Jvb  
TSTX: Tolerance on surface tilt in x (degrees). MRvtuE|g  
TSTY: Tolerance on surface tilt in y (degrees). {;4AdZk  
TIRR: Tolerance on irregularity (fringes). ${n=1-SMU  
TIND: Tolerance on Nd index of refraction. l" y==y  
TEDX: Tolerance on element decentering in x. wAE,mw
 
TEDY: Tolerance on element decentering in y. Ya] qo]  
TETX: Tolerance on element tilt in x (degrees). l[]K5?AS>-  
TETY: Tolerance on element tilt in y (degrees). mq$mB1$3u  
3 wVN:g7  
WARNING: RAY AIMING IS OFF. Very loose tolerances may not be computed accurately. n50XGv  
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WARNING: Boundary constraints on compensators will be ignored. ZVotIQ/Q'  
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Criterion           : Geometric MTF average S&T at 30.0000 cycles per mm 3=9yR**  
Mode                : Sensitivities 5#JGNxO  
Sampling            : 2 Mf0g)X}1  
Nominal Criterion   : 0.54403234 X&._<2  
Test Wavelength     : 0.6328 [T', ZLR|  
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Fields: XY Symmetric Angle in degrees >LxYP7M  
#      X-Field      Y-Field       Weight    VDX    VDY    VCX    VCY d)|{iUcW  
1   0.000E+000   0.000E+000   1.000E+000  0.000  0.000  0.000  0.000 Vm]ltiTVk  
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Sensitivity Analysis: nGA'\+zjL  
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                 |----------------- Minimum ----------------| |----------------- Maximum ----------------| -ecP@,  
Type                      Value      Criterion        Change          Value      Criterion        Change 5,!,mor$]  
Fringe tolerance on surface 1 | ]`gps  
TFRN   1            -1.00000000     0.54257256    -0.00145977     1.00000000     0.54548607     0.00145374 +~J?/  
Change in Focus                :      -0.000000                            0.000000 0 1[LPN  
Fringe tolerance on surface 2 'j=7'aX>K  
TFRN   2            -1.00000000     0.54177471    -0.00225762     1.00000000     0.54627463     0.00224230 ~~]/<d  
Change in Focus                :       0.000000                            0.000000 07-S%L7Z  
Fringe tolerance on surface 3 Mn+;3qo{6  
TFRN   3            -1.00000000     0.54779866     0.00376632     1.00000000     0.54022572    -0.00380662 VAf~,T]Ww  
Change in Focus                :      -0.000000                            0.000000 "|pNS)  
Thickness tolerance on surface 1 -}k'a{sj=  
TTHI   1   3        -0.20000000     0.54321462    -0.00081772     0.20000000     0.54484759     0.00081525 D3yG@lIP3  
Change in Focus                :       0.000000                            0.000000  G~T]
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Thickness tolerance on surface 2 sqHvrI  
TTHI   2   3        -0.20000000     0.54478712     0.00075478     0.20000000     0.54327558    -0.00075675 2X2,(D!  
Change in Focus                :       0.000000                           -0.000000 NUBzmnA>8  
Decenter X tolerance on surfaces 1 through 3 ?}sh@;]*h  
TEDX   1   3        -0.20000000     0.54401464   -1.7700E-005     0.20000000     0.54401464   -1.7700E-005 j.4oYxK!s/  
Change in Focus                :       0.000000                            0.000000 #V[?puE@  
Decenter Y tolerance on surfaces 1 through 3 -CW&!oW  
TEDY   1   3        -0.20000000     0.54401464   -1.7700E-005     0.20000000     0.54401464   -1.7700E-005 ZjY_AbD  
Change in Focus                :       0.000000                            0.000000 NLM ]KT  
Tilt X tolerance on surfaces 1 through 3 (degrees) qOz,iR?}  
TETX   1   3        -0.20000000     0.54897548     0.00494314     0.20000000     0.54897548     0.00494314 ws5x53K  
Change in Focus                :       0.000000                            0.000000 )NZ6!3[@  
Tilt Y tolerance on surfaces 1 through 3 (degrees) }.|\<8_  
TETY   1   3        -0.20000000     0.54897548     0.00494314     0.20000000     0.54897548     0.00494314 .EVy?-   
Change in Focus                :       0.000000                            0.000000 vBsd.2t~  
Decenter X tolerance on surface 1 w3:WvA5jt  
TSDX   1            -0.20000000     0.53999563    -0.00403671     0.20000000     0.53999563    -0.00403671 BR\%
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Change in Focus                :       0.000000                            0.000000 w\=zTHo88  
Decenter Y tolerance on surface 1 |E!()j=  
TSDY   1            -0.20000000     0.53999563    -0.00403671     0.20000000     0.53999563    -0.00403671 O z%K*  
Change in Focus                :       0.000000                            0.000000 ke|v|@  
Tilt X tolerance on surface (degrees) 1 UC^&& 2maI  
TSTX   1            -0.20000000     0.42678383    -0.11724851     0.20000000     0.42678383    -0.11724851 }[Uh4k8P  
Change in Focus                :       0.000000                            0.000000 (utm+*V,  
Tilt Y tolerance on surface (degrees) 1 &V1N a1`  
TSTY   1            -0.20000000     0.42678383    -0.11724851     0.20000000     0.42678383    -0.11724851 !cw<C*
 
Change in Focus                :       0.000000                            0.000000 &$  F0  
Decenter X tolerance on surface 2 I.tJ4  
TSDX   2            -0.20000000     0.51705427    -0.02697807     0.20000000     0.51705427    -0.02697807 ed*Cx~rT  
Change in Focus                :       0.000000                            0.000000 c
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Decenter Y tolerance on surface 2 &oiX/UaY  
TSDY   2            -0.20000000     0.51705427    -0.02697807     0.20000000     0.51705427    -0.02697807 b
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Change in Focus                :       0.000000                            0.000000 8):I< }s#  
Tilt X tolerance on surface (degrees) 2 wXDF7tJh  
TSTX   2            -0.20000000     0.35349910    -0.19053324     0.20000000     0.35349910    -0.19053324 noe1*2*TE  
Change in Focus                :       0.000000                            0.000000 bv0B  
Tilt Y tolerance on surface (degrees) 2 n1o/-UY  
TSTY   2            -0.20000000     0.35349910    -0.19053324     0.20000000     0.35349910    -0.19053324 dN;kYWRK  
Change in Focus                :       0.000000                            0.000000 )7=B]{B_  
Decenter X tolerance on surface 3 g~.,
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TSDX   3            -0.20000000     0.53419039    -0.00984195     0.20000000     0.53419039    -0.00984195 9}`O*A=KC  
Change in Focus                :       0.000000                            0.000000 BDxrSq,H  
Decenter Y tolerance on surface 3 ]P$8# HiX  
TSDY   3            -0.20000000     0.53419039    -0.00984195     0.20000000     0.53419039    -0.00984195 NKLGbH  
Change in Focus                :       0.000000                            0.000000 KgVit+4u/  
Tilt X tolerance on surface (degrees) 3 ]>/YU*\  
TSTX   3            -0.20000000     0.42861670    -0.11541563     0.20000000     0.42861670    -0.11541563 [y}/QPR  
Change in Focus                :       0.000000                            0.000000 Y\BB;"x1  
Tilt Y tolerance on surface (degrees) 3 l9)iLOj  
TSTY   3            -0.20000000     0.42861670    -0.11541563     0.20000000     0.42861670    -0.11541563 YS,kjL/  
Change in Focus                :       0.000000                            0.000000 <1&kCfE
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Irregularity of surface 1 in fringes Vj4 if@Z  
TIRR   1            -0.20000000     0.50973587    -0.03429647     0.20000000     0.57333868     0.02930634 .=rv,PWjZ  
Change in Focus                :       0.000000                            0.000000 [e3|yE6  
Irregularity of surface 2 in fringes L@S"c (  
TIRR   2            -0.20000000     0.53400904    -0.01002330     0.20000000     0.55360281     0.00957047 5}9-)\8=z  
Change in Focus                :       0.000000                            0.000000 C!XI0d  
Irregularity of surface 3 in fringes qLKyr@
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TIRR   3            -0.20000000     0.58078982     0.03675748     0.20000000     0.49904394    -0.04498840 \^;Gv%E  
Change in Focus                :       0.000000                            0.000000 EG&^;uU  
Index tolerance on surface 1 lf0/0KH  
TIND   1            -0.00100000     0.52606778    -0.01796456     0.00100000     0.56121811     0.01718578 mLk@&WxG  
Change in Focus                :       0.000000                            0.000000 m0]LY-t  
Index tolerance on surface 2 9~zh]deH  
TIND   2            -0.00100000     0.55639086     0.01235852     0.00100000     0.53126361    -0.01276872 x`PIJE  
Change in Focus                :       0.000000                           -0.000000 :84ja>`c  
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Worst offenders: G6JyAC
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Type                      Value      Criterion        Change 3`TC*  
TSTY   2            -0.20000000     0.35349910    -0.19053324 84b;G4K  
TSTY   2             0.20000000     0.35349910    -0.19053324 )]J I Q"rR  
TSTX   2            -0.20000000     0.35349910    -0.19053324 )&+_T+\  
TSTX   2             0.20000000     0.35349910    -0.19053324 o}v #Df  
TSTY   1            -0.20000000     0.42678383    -0.11724851 "+_]N9%)  
TSTY   1             0.20000000     0.42678383    -0.11724851 b-]E-$Uz  
TSTX   1            -0.20000000     0.42678383    -0.11724851 IG`~^-}7lR  
TSTX   1             0.20000000     0.42678383    -0.11724851 kBIF[.v(\  
TSTY   3            -0.20000000     0.42861670    -0.11541563 ;VK;_d  
TSTY   3             0.20000000     0.42861670    -0.11541563 `m3@mJ!>\  
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Estimated Performance Changes based upon Root-Sum-Square method: HCHP15otfe  
Nominal MTF                 :     0.54403234 VT3Zo%Xx  
Estimated change            :    -0.36299231 #H O\I7m  
Estimated MTF               :     0.18104003 R|V<2  
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Compensator Statistics: @EO#Ms  
Change in back focus: ^Q!:0D*  
Minimum            :        -0.000000 }S*6+4  
Maximum            :         0.000000 ^eM=h
 
Mean               :        -0.000000 )@eBe^  
Standard Deviation :         0.000000 PC\Xm,,  
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Monte Carlo Analysis: 6i.'S5.  
Number of trials: 20 E|
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Initial Statistics: Normal Distribution zmr=iK  
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  Trial       Criterion        Change 7;CeQx/W)W  
      1     0.42804416    -0.11598818 W:(:hT6`j9  
Change in Focus                :      -0.400171 %T'?7^\>  
      2     0.54384387    -0.00018847 rO]C`bg  
Change in Focus                :       1.018470 yl 
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      3     0.44510003    -0.09893230 qu[w_1%S  
Change in Focus                :      -0.601922 {!N4|  
      4     0.18154684    -0.36248550 wB9IP{Pf  
Change in Focus                :       0.920681 FT|*~_@  
      5     0.28665820    -0.25737414 U&u7d$ANP  
Change in Focus                :       1.253875 DIk$9$"<x  
      6     0.21263372    -0.33139862 *N>Qj-KAM_  
Change in Focus                :      -0.903878 OzO_E8Kb\  
      7     0.40051424    -0.14351809 /@3+zpaw X  
Change in Focus                :      -1.354815 GbP!l;a  
      8     0.48754161    -0.05649072 @;rVB  
Change in Focus                :       0.215922 GGJ_,S*  
      9     0.40357468    -0.14045766 1/c
b;:h>  
Change in Focus                :       0.281783 '')G6-c/  
     10     0.26315315    -0.28087919 cYbO)?mC_  
Change in Focus                :      -1.048393 .z[+sy_  
     11     0.26120585    -0.28282649 YvYavd  
Change in Focus                :       1.017611 Phb<##OB  
     12     0.24033815    -0.30369419 "*7I~.7U(*  
Change in Focus                :      -0.109292 A:D\!5=  
     13     0.37164046    -0.17239188 <U~P-c tN  
Change in Focus                :      -0.692430 d\)v62P  
     14     0.48597489    -0.05805744 3\4Cg()  
Change in Focus                :      -0.662040 E32z(:7M  
     15     0.21462327    -0.32940907 +Og O<P  
Change in Focus                :       1.611296 hA@X;Mh^w  
     16     0.43378226    -0.11025008 _I8-0DnOM  
Change in Focus                :      -0.640081 iGhapD  
     17     0.39321881    -0.15081353 L1F){8[  
Change in Focus                :       0.914906 E_H1X'|qS4  
     18     0.20692530    -0.33710703 SQ.4IWT(hR  
Change in Focus                :       0.801607 ?0?'  
     19     0.51374068    -0.03029165 c<H4rB  
Change in Focus                :       0.947293 I* bjE'  
     20     0.38013374    -0.16389860 'R'>`?Nh  
Change in Focus                :       0.667010 #e|eWi>  
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Number of traceable Monte Carlo files generated: 20 {>+$u"*  
]-}a{z  
Nominal     0.54403234 #t/Q4X +  
Best        0.54384387    Trial     2 TuF:m"4  
Worst       0.18154684    Trial     4 ;m5M:Z"  
Mean        0.35770970 i
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Std Dev     0.11156454 kqyMrZ#  
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kEXcEF_9P  
Compensator Statistics: "(xS  
Change in back focus: ;=7z!:)  
Minimum            :        -1.354815 mi-\PD>X  
Maximum            :         1.611296 "
~[Rwh?  
Mean               :         0.161872 Qb|dp~K.M  
Standard Deviation :         0.869664 c3}}cFe  
.Yf h*  
90% >       0.20977951               %/^d]#  
80% >       0.22748071               i]YQq!B  
50% >       0.38667627               b9YpUm7#  
20% >       0.46553746               }Sh-4:-D  
10% >       0.50064115                >u4e:/5]  
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End of Run. n;=A'g|Q  
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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 -?]ltn9!  

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 n (|>7  
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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                 V4-=Ni]k  
80% >       0.22748071                 LnDj   
50% >       0.38667627                 sfV.X:ev  
20% >       0.46553746                 Z C93C7lJ  
10% >       0.50064115 $imx-H`|  
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最后这个数值是MTF值呢，还是MTF的公差？ W~tOH=9>  
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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？？？   [FL I+;gY  
uI2'jEjO  
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  : %8CT -mQ  
90% >       0.20977951                 7&V^BW  
80% >       0.22748071                 / 7XdV  
50% >       0.38667627                 1L8ULxi_?]  
20% >       0.46553746                 J xm9@,  
10% >       0.50064115 m}[~A@qD  
....... jne9=Als5  

MW$H/:3  
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这些数值都是MTF值

Criterion           : Geometric MTF average S&T at 30.0000 cycles per mm   Cxk$"_  
Mode                : Sensitivities L\Fu']l  
Sampling            : 2 E)Qh]:<2v  
Nominal Criterion   : 0.54403234 `x$}~rP&)!  
Test Wavelength     : 0.6328 e*2&s5 #RT  
.\~P -{Hd  
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？ Krr?`n  
cl8_rt  
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