[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/ @Q  
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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 P<xCg  
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图片:2.jpg

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然后运行分析的结果如下： +u7nx  
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Analysis of Tolerances DVyxe
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File : E:\光学设计资料\zemax练习\f500.ZMX dy0xz5N-  
Title: ];}7 %3  
Date : TUE JUN 21 2011 ud,_^Ul  
:+S~N)0j^  
Units are Millimeters. '%A*Z,f  
All changes are computed using linear differences. UazUr=|e  
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Paraxial Focus compensation only. v/7iu*u  
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WARNING: Solves should be removed prior to tolerancing. KA0_uty/T  
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Mnemonics: DKf:0E8  
TFRN: Tolerance on curvature in fringes. %MUwd@,  
TTHI: Tolerance on thickness. -u'BK@;
  
TSDX: Tolerance on surface decentering in x. *e-+~/9~  
TSDY: Tolerance on surface decentering in y. > 1&_-  
TSTX: Tolerance on surface tilt in x (degrees). UzmD2AsO"  
TSTY: Tolerance on surface tilt in y (degrees). . !;K5U  
TIRR: Tolerance on irregularity (fringes). Bso3Z ^X.  
TIND: Tolerance on Nd index of refraction. ghqq%g  
TEDX: Tolerance on element decentering in x. tqe8:\1yK  
TEDY: Tolerance on element decentering in y. 41`&/9:"_M  
TETX: Tolerance on element tilt in x (degrees). "@)9$-g  
TETY: Tolerance on element tilt in y (degrees). u~^d5["T  
/F6=iHK(l  
WARNING: RAY AIMING IS OFF. Very loose tolerances may not be computed accurately. onAC;<w  
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WARNING: Boundary constraints on compensators will be ignored. U ORoj )$I  
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Criterion           : Geometric MTF average S&T at 30.0000 cycles per mm g>O O '}lF  
Mode                : Sensitivities P ".[=h  
Sampling            : 2 ~<#!yRy>r  
Nominal Criterion   : 0.54403234 RZ&T\;m,7  
Test Wavelength     : 0.6328 $]yHk  
|cE 69UFB  
-F|
C6m!  
Fields: XY Symmetric Angle in degrees kMLWF  
#      X-Field      Y-Field       Weight    VDX    VDY    VCX    VCY %7~~*_G  
1   0.000E+000   0.000E+000   1.000E+000  0.000  0.000  0.000  0.000 H|0GRjC  
m0k~8^L@f  
Sensitivity Analysis: &*#- %<=1  
tZ]/?+1G  
                 |----------------- Minimum ----------------| |----------------- Maximum ----------------| #2023Zo]  
Type                      Value      Criterion        Change          Value      Criterion        Change sh%snLw  
Fringe tolerance on surface 1 gf8DhiB  
TFRN   1            -1.00000000     0.54257256    -0.00145977     1.00000000     0.54548607     0.00145374 $NtbI:e{  
Change in Focus                :      -0.000000                            0.000000 Xr@]7: ,  
Fringe tolerance on surface 2 2=6}! Y  
TFRN   2            -1.00000000     0.54177471    -0.00225762     1.00000000     0.54627463     0.00224230 5L}qL?S`x|  
Change in Focus                :       0.000000                            0.000000 .:b|imgiv  
Fringe tolerance on surface 3 *h>KeIB;  
TFRN   3            -1.00000000     0.54779866     0.00376632     1.00000000     0.54022572    -0.00380662 X_eh+>D  
Change in Focus                :      -0.000000                            0.000000 4j'cXxo  
Thickness tolerance on surface 1 MZX-<p+  
TTHI   1   3        -0.20000000     0.54321462    -0.00081772     0.20000000     0.54484759     0.00081525 (ft8,^=4  
Change in Focus                :       0.000000                            0.000000 czV][\5  
Thickness tolerance on surface 2 26,!HmtC  
TTHI   2   3        -0.20000000     0.54478712     0.00075478     0.20000000     0.54327558    -0.00075675 QM }TPE  
Change in Focus                :       0.000000                           -0.000000 6:(*
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Decenter X tolerance on surfaces 1 through 3 +JMB98+l  
TEDX   1   3        -0.20000000     0.54401464   -1.7700E-005     0.20000000     0.54401464   -1.7700E-005 Wm/0Y'$r&k  
Change in Focus                :       0.000000                            0.000000 q >|:mXR  
Decenter Y tolerance on surfaces 1 through 3 zMkjdjb  
TEDY   1   3        -0.20000000     0.54401464   -1.7700E-005     0.20000000     0.54401464   -1.7700E-005 ;U=RV&  
Change in Focus                :       0.000000                            0.000000 #q"^6C 5  
Tilt X tolerance on surfaces 1 through 3 (degrees) (gv1f  
TETX   1   3        -0.20000000     0.54897548     0.00494314     0.20000000     0.54897548     0.00494314 f@%H"8w!  
Change in Focus                :       0.000000                            0.000000 %!G]H  
Tilt Y tolerance on surfaces 1 through 3 (degrees) a;Q.R  
TETY   1   3        -0.20000000     0.54897548     0.00494314     0.20000000     0.54897548     0.00494314 :i&ZMH,O  
Change in Focus                :       0.000000                            0.000000 EVW{!\8[  
Decenter X tolerance on surface 1 D,rF?t>=S  
TSDX   1            -0.20000000     0.53999563    -0.00403671     0.20000000     0.53999563    -0.00403671 ZV`D} CQ  
Change in Focus                :       0.000000                            0.000000 e.<$G'  
Decenter Y tolerance on surface 1 v^a. b  
TSDY   1            -0.20000000     0.53999563    -0.00403671     0.20000000     0.53999563    -0.00403671 8T:|~%Sw  
Change in Focus                :       0.000000                            0.000000 \/J7U|@Lt  
Tilt X tolerance on surface (degrees) 1 v:MJF*/  
TSTX   1            -0.20000000     0.42678383    -0.11724851     0.20000000     0.42678383    -0.11724851 $Q[a^V~:  
Change in Focus                :       0.000000                            0.000000 9~^%v zM  
Tilt Y tolerance on surface (degrees) 1 1Y"[Qs]"mU  
TSTY   1            -0.20000000     0.42678383    -0.11724851     0.20000000     0.42678383    -0.11724851 Y7yh0r_  
Change in Focus                :       0.000000                            0.000000 Qo!/]\  
Decenter X tolerance on surface 2 AS34yM(h  
TSDX   2            -0.20000000     0.51705427    -0.02697807     0.20000000     0.51705427    -0.02697807 ;hz"`{(JY  
Change in Focus                :       0.000000                            0.000000 R$<LEwjSw  
Decenter Y tolerance on surface 2 I@l'Fx  
TSDY   2            -0.20000000     0.51705427    -0.02697807     0.20000000     0.51705427    -0.02697807 xHv<pza:  
Change in Focus                :       0.000000                            0.000000 >;N0( xB  
Tilt X tolerance on surface (degrees) 2 e5bRi0  
TSTX   2            -0.20000000     0.35349910    -0.19053324     0.20000000     0.35349910    -0.19053324 *<yKT$(+_  
Change in Focus                :       0.000000                            0.000000 T [ `t?,  
Tilt Y tolerance on surface (degrees) 2 5G@z l  
TSTY   2            -0.20000000     0.35349910    -0.19053324     0.20000000     0.35349910    -0.19053324 ]>NP?S )R  
Change in Focus                :       0.000000                            0.000000 \$o!M1j  
Decenter X tolerance on surface 3 ]o<'T.x  
TSDX   3            -0.20000000     0.53419039    -0.00984195     0.20000000     0.53419039    -0.00984195 :"9 :J  
Change in Focus                :       0.000000                            0.000000 @;iW)a_M  
Decenter Y tolerance on surface 3 Y|t]bb  
TSDY   3            -0.20000000     0.53419039    -0.00984195     0.20000000     0.53419039    -0.00984195 qNP&f8fH  
Change in Focus                :       0.000000                            0.000000 +1j@n.)ft  
Tilt X tolerance on surface (degrees) 3 aHosu=NK  
TSTX   3            -0.20000000     0.42861670    -0.11541563     0.20000000     0.42861670    -0.11541563 v,N*vqWS  
Change in Focus                :       0.000000                            0.000000 1us-ootsjP  
Tilt Y tolerance on surface (degrees) 3 c}a.  
TSTY   3            -0.20000000     0.42861670    -0.11541563     0.20000000     0.42861670    -0.11541563 JG xuB*}  
Change in Focus                :       0.000000                            0.000000 #>+O=YO  
Irregularity of surface 1 in fringes Np4';
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TIRR   1            -0.20000000     0.50973587    -0.03429647     0.20000000     0.57333868     0.02930634 eeX^zaKl]  
Change in Focus                :       0.000000                            0.000000 <KF|QE  
Irregularity of surface 2 in fringes `+[e]dH  
TIRR   2            -0.20000000     0.53400904    -0.01002330     0.20000000     0.55360281     0.00957047 yUF<qB
 
Change in Focus                :       0.000000                            0.000000 CQf!<  
Irregularity of surface 3 in fringes 9NTBdo%u  
TIRR   3            -0.20000000     0.58078982     0.03675748     0.20000000     0.49904394    -0.04498840 3fJGJW!zu  
Change in Focus                :       0.000000                            0.000000 d'~ kf#  
Index tolerance on surface 1 c:0nOP  
TIND   1            -0.00100000     0.52606778    -0.01796456     0.00100000     0.56121811     0.01718578 5;wA7@  
Change in Focus                :       0.000000                            0.000000 +H5=zf2  
Index tolerance on surface 2 1b:3'E.#w  
TIND   2            -0.00100000     0.55639086     0.01235852     0.00100000     0.53126361    -0.01276872 -POV#1s  
Change in Focus                :       0.000000                           -0.000000 \2(Uqf#_  
A`Vz5WB  
Worst offenders: vdFy}#X  
Type                      Value      Criterion        Change R}MdBE  
TSTY   2            -0.20000000     0.35349910    -0.19053324 .4c*  _$  
TSTY   2             0.20000000     0.35349910    -0.19053324 R[Q`2ggG  
TSTX   2            -0.20000000     0.35349910    -0.19053324 aqq7u5O1
r  
TSTX   2             0.20000000     0.35349910    -0.19053324 R=g~od[N_  
TSTY   1            -0.20000000     0.42678383    -0.11724851 ~1&%,$fZ  
TSTY   1             0.20000000     0.42678383    -0.11724851 1Zc1CUMG  
TSTX   1            -0.20000000     0.42678383    -0.11724851 J<h^V+x  
TSTX   1             0.20000000     0.42678383    -0.11724851 6/^$SWd2  
TSTY   3            -0.20000000     0.42861670    -0.11541563 P;o6rQf  
TSTY   3             0.20000000     0.42861670    -0.11541563 SoZ$1$o2  
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Estimated Performance Changes based upon Root-Sum-Square method: Z?k4Kb  
Nominal MTF                 :     0.54403234 J%d\ 7  
Estimated change            :    -0.36299231 tu}AJ  
Estimated MTF               :     0.18104003 C$o#zu q-  
(uV~1  
Compensator Statistics: 8Fy$'Zx'  
Change in back focus: 5$o]
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Minimum            :        -0.000000 QAYhAOS|e  
Maximum            :         0.000000 BgLW!|T[  
Mean               :        -0.000000 '\qd{mM\r  
Standard Deviation :         0.000000 M>hHTa?W  
NF`WA-W8@  
Monte Carlo Analysis: %N 8/g]`7  
Number of trials: 20 Fm(~Vt;%u  
f\O)+Vc  
Initial Statistics: Normal Distribution Kbjt CI7  
<}S1ZEZcQ  
  Trial       Criterion        Change J(+I`  
      1     0.42804416    -0.11598818 jE!<]   
Change in Focus                :      -0.400171 @+LkGrDP  
      2     0.54384387    -0.00018847 OYKeu(=L  
Change in Focus                :       1.018470 23XSQHVx  
      3     0.44510003    -0.09893230 E6(OEC%,  
Change in Focus                :      -0.601922 AfmGA9  
      4     0.18154684    -0.36248550 "L^Klk?Vn  
Change in Focus                :       0.920681 :7&#ej6  
      5     0.28665820    -0.25737414 "Sp+Q&2U  
Change in Focus                :       1.253875 '`g#Zo  
      6     0.21263372    -0.33139862 R*~<?}Rr  
Change in Focus                :      -0.903878 j)IXe 0dMC  
      7     0.40051424    -0.14351809 4:\1S~WW  
Change in Focus                :      -1.354815 G0p|44_~t  
      8     0.48754161    -0.05649072 z(]14250  
Change in Focus                :       0.215922 L'k)  
      9     0.40357468    -0.14045766 Dohq@+] O  
Change in Focus                :       0.281783 t}LV[bj1u  
     10     0.26315315    -0.28087919 s'\PU1{  
Change in Focus                :      -1.048393 *B"p:F7J|  
     11     0.26120585    -0.28282649 v;.7-9c*  
Change in Focus                :       1.017611 s)Bl1\Q  
     12     0.24033815    -0.30369419 jt|e?1:vF  
Change in Focus                :      -0.109292 EVc Ees  
     13     0.37164046    -0.17239188 gf/$M[H!   
Change in Focus                :      -0.692430 /mLOh2T  
     14     0.48597489    -0.05805744 Xq`|'6]/  
Change in Focus                :      -0.662040 vZj:\geV  
     15     0.21462327    -0.32940907 7{HJjH!zx  
Change in Focus                :       1.611296 FHpS?htRy  
     16     0.43378226    -0.11025008 j'Ry.8}  
Change in Focus                :      -0.640081 ceN*wkGyB  
     17     0.39321881    -0.15081353 S;#S3?G  
Change in Focus                :       0.914906 hES_JbX}]  
     18     0.20692530    -0.33710703 7PG&G5  
Change in Focus                :       0.801607 {@K>oaZ  
     19     0.51374068    -0.03029165 }3sj{:z{  
Change in Focus                :       0.947293 @]r,cPx0Y  
     20     0.38013374    -0.16389860 X`kTbIZ|  
Change in Focus                :       0.667010 %00KOM:
 
"~~Js~  
Number of traceable Monte Carlo files generated: 20 5Ug.J{d  
{+~}iF<%  
Nominal     0.54403234 O>]I!n`!!A  
Best        0.54384387    Trial     2 LQT^1|nq  
Worst       0.18154684    Trial     4 po@=$HK  
Mean        0.35770970 N"d M+  
Std Dev     0.11156454 ]AoRK=aH  
 ;0G+>&C8  
W]E6<y'  
Compensator Statistics: jd<`W  
Change in back focus: Le#>uWM  
Minimum            :        -1.354815 ^NZq1c  
Maximum            :         1.611296 KQ0Zy  
Mean               :         0.161872 kSJWXNC  
Standard Deviation :         0.869664 ? <b>2j  
/NvHM$5O%  
90% >       0.20977951               LWG%]m|C  
80% >       0.22748071               AlP}H~|M7  
50% >       0.38667627               eUP.:(E  
20% >       0.46553746               9[yW&t;#  
10% >       0.50064115                Zpfsh2`  
-4du`dg  
End of Run. TEQs\d  
V$U#'G>m  
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 #R2wt7vE  

图片:3.JPG

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$['_m~ 2  
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 wrw4Uxq  
hSQ*_#  
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                 /6Bm <k%  
80% >       0.22748071                 Mk-zeq<2z  
50% >       0.38667627                 L_@P fI
 
20% >       0.46553746                 ^l;N;5L  
10% >       0.50064115 4i]h0_]  
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最后这个数值是MTF值呢，还是MTF的公差？ &YiUhK  
'ozu4y  
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？？？   Hl"^E*9x  
QOT|6)Yb  
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  : BJP^?FUd=,  
90% >       0.20977951                 (.~,I+Cz'  
80% >       0.22748071                 LZ4Z]!V  
50% >       0.38667627                 Uqd2{fji=#  
20% >       0.46553746                 {fxytiH8  
10% >       0.50064115 '>Uip+'  
....... [P3 Z"&  

)Im3';qt  
F7&Oc)f"B  
这些数值都是MTF值

Criterion           : Geometric MTF average S&T at 30.0000 cycles per mm   &\5%C\0Z<  
Mode                : Sensitivities ;@/vKA3l.  
Sampling            : 2 t}fU 2Yb  
Nominal Criterion   : 0.54403234 f}:W1&LhI?  
Test Wavelength     : 0.6328 iUOGuiP  
KY9&Ky+2B  
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？ "a]Ff&T-  
VN >X/  
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