[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 F^]?'`7md  
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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 DgLSDKO!  
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图片:2.jpg

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然后运行分析的结果如下： _z!0ab  
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Analysis of Tolerances QJG]z'c+  
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File : E:\光学设计资料\zemax练习\f500.ZMX 995^[c1o6  
Title: y{eZrX|  
Date : TUE JUN 21 2011 "Jp6EL%  
Hf/2KYZ  
Units are Millimeters. JAA P5ur  
All changes are computed using linear differences. YJ5;a\QxN  
Z6cG<,DQ  
Paraxial Focus compensation only. rr[9sk`^H  
!HXdUAKu  
WARNING: Solves should be removed prior to tolerancing. 7<=7RPWmD  
wBcDL/(>  
Mnemonics: K6,5C0  
TFRN: Tolerance on curvature in fringes. b*6c.  
TTHI: Tolerance on thickness. Lh &L5p7  
TSDX: Tolerance on surface decentering in x. a<V=C  
TSDY: Tolerance on surface decentering in y. azB~>#
H~  
TSTX: Tolerance on surface tilt in x (degrees).
n#N<zC/  
TSTY: Tolerance on surface tilt in y (degrees). rrSA.J{  
TIRR: Tolerance on irregularity (fringes). fxLhVJ"b  
TIND: Tolerance on Nd index of refraction. X/1Z9a+W  
TEDX: Tolerance on element decentering in x. s8``U~D  
TEDY: Tolerance on element decentering in y. !qH=l-7A  
TETX: Tolerance on element tilt in x (degrees). rr4yJ;qpeP  
TETY: Tolerance on element tilt in y (degrees). )_EobE\  
$gZ|=(y&r  
WARNING: RAY AIMING IS OFF. Very loose tolerances may not be computed accurately. mId{f  
ji(S ?^  
WARNING: Boundary constraints on compensators will be ignored. "VWxHRVg4M  
e7L;{+XI  
Criterion           : Geometric MTF average S&T at 30.0000 cycles per mm q9Y0Lk  
Mode                : Sensitivities @fpxGMy&  
Sampling            : 2 "0L@cOyG  
Nominal Criterion   : 0.54403234 $^7&bQ  
Test Wavelength     : 0.6328 d*3R0Q|#{  
i=2+1;K  
$zCUQthL@  
Fields: XY Symmetric Angle in degrees q0y?$XS  
#      X-Field      Y-Field       Weight    VDX    VDY    VCX    VCY p,D/ Pb8  
1   0.000E+000   0.000E+000   1.000E+000  0.000  0.000  0.000  0.000 2 ;B[n;Q{  
U(./LrM05  
Sensitivity Analysis: `p^M\!h*O  
q#\eL~k  
                 |----------------- Minimum ----------------| |----------------- Maximum ----------------| Gz*U?R-T  
Type                      Value      Criterion        Change          Value      Criterion        Change l!iB -?'u  
Fringe tolerance on surface 1 72-@!Z0e  
TFRN   1            -1.00000000     0.54257256    -0.00145977     1.00000000     0.54548607     0.00145374 &P ;6P4x  
Change in Focus                :      -0.000000                            0.000000 >5 5/@+^  
Fringe tolerance on surface 2 GW $iK@  
TFRN   2            -1.00000000     0.54177471    -0.00225762     1.00000000     0.54627463     0.00224230 k5xirB_  
Change in Focus                :       0.000000                            0.000000 g1J]z<&  
Fringe tolerance on surface 3 QW2% Gv:  
TFRN   3            -1.00000000     0.54779866     0.00376632     1.00000000     0.54022572    -0.00380662 ^U_jeAuk8[  
Change in Focus                :      -0.000000                            0.000000 # |UrHK;  
Thickness tolerance on surface 1 r9vC&pWZ  
TTHI   1   3        -0.20000000     0.54321462    -0.00081772     0.20000000     0.54484759     0.00081525 DTIy/  
Change in Focus                :       0.000000                            0.000000 _X.M,id  
Thickness tolerance on surface 2 NM]6 o  
TTHI   2   3        -0.20000000     0.54478712     0.00075478     0.20000000     0.54327558    -0.00075675 % 9WWBxS  
Change in Focus                :       0.000000                           -0.000000 50H[u|  
Decenter X tolerance on surfaces 1 through 3 sox90o 7  
TEDX   1   3        -0.20000000     0.54401464   -1.7700E-005     0.20000000     0.54401464   -1.7700E-005 %)aDh }  
Change in Focus                :       0.000000                            0.000000 1g/mzC
  
Decenter Y tolerance on surfaces 1 through 3 5d4-95['_  
TEDY   1   3        -0.20000000     0.54401464   -1.7700E-005     0.20000000     0.54401464   -1.7700E-005 2=3
iA09px  
Change in Focus                :       0.000000                            0.000000 <g%xo"  
Tilt X tolerance on surfaces 1 through 3 (degrees) Y0hL_46>  
TETX   1   3        -0.20000000     0.54897548     0.00494314     0.20000000     0.54897548     0.00494314 #-VKk  
Change in Focus                :       0.000000                            0.000000 :!A@B.E  
Tilt Y tolerance on surfaces 1 through 3 (degrees) ,zw  
TETY   1   3        -0.20000000     0.54897548     0.00494314     0.20000000     0.54897548     0.00494314 zR<jZwo]#  
Change in Focus                :       0.000000                            0.000000 "1#,d#Q$  
Decenter X tolerance on surface 1 xjX5PQu  
TSDX   1            -0.20000000     0.53999563    -0.00403671     0.20000000     0.53999563    -0.00403671 Aqm0|GlJ  
Change in Focus                :       0.000000                            0.000000 Aio0++r-  
Decenter Y tolerance on surface 1 L]tyL)  
TSDY   1            -0.20000000     0.53999563    -0.00403671     0.20000000     0.53999563    -0.00403671 uuC/F_='B  
Change in Focus                :       0.000000                            0.000000 $Y4 Ao-@  
Tilt X tolerance on surface (degrees) 1 [wOO)FjT  
TSTX   1            -0.20000000     0.42678383    -0.11724851     0.20000000     0.42678383    -0.11724851 ?
QMs<  
Change in Focus                :       0.000000                            0.000000 !9N%=6\  
Tilt Y tolerance on surface (degrees) 1 p{U8z\  
TSTY   1            -0.20000000     0.42678383    -0.11724851     0.20000000     0.42678383    -0.11724851  :D/R  
Change in Focus                :       0.000000                            0.000000 w\QpQ~OX  
Decenter X tolerance on surface 2 4v?S`w:6  
TSDX   2            -0.20000000     0.51705427    -0.02697807     0.20000000     0.51705427    -0.02697807 eX$Biv1N  
Change in Focus                :       0.000000                            0.000000 +<|w|c  
Decenter Y tolerance on surface 2 7:;V[/  
TSDY   2            -0.20000000     0.51705427    -0.02697807     0.20000000     0.51705427    -0.02697807 HYY|)Wo  
Change in Focus                :       0.000000                            0.000000 {M$8V~8D  
Tilt X tolerance on surface (degrees) 2 6RtpB\hq  
TSTX   2            -0.20000000     0.35349910    -0.19053324     0.20000000     0.35349910    -0.19053324 /;>EyWW  
Change in Focus                :       0.000000                            0.000000 GS^4tmc  
Tilt Y tolerance on surface (degrees) 2 =Vv{td  
TSTY   2            -0.20000000     0.35349910    -0.19053324     0.20000000     0.35349910    -0.19053324 NSkI2>+P  
Change in Focus                :       0.000000                            0.000000 >]`x~cE.5  
Decenter X tolerance on surface 3 /za,&7sf  
TSDX   3            -0.20000000     0.53419039    -0.00984195     0.20000000     0.53419039    -0.00984195 2-6-kS)c  
Change in Focus                :       0.000000                            0.000000 k{#:O=  
Decenter Y tolerance on surface 3 U9q*zP_jV  
TSDY   3            -0.20000000     0.53419039    -0.00984195     0.20000000     0.53419039    -0.00984195 3A9|{Vaz+6  
Change in Focus                :       0.000000                            0.000000 v;A  
Tilt X tolerance on surface (degrees) 3 0jyokER  
TSTX   3            -0.20000000     0.42861670    -0.11541563     0.20000000     0.42861670    -0.11541563 5Tu.2.)N  
Change in Focus                :       0.000000                            0.000000 Tv KX8m"  
Tilt Y tolerance on surface (degrees) 3 GQQ!3LwP\O  
TSTY   3            -0.20000000     0.42861670    -0.11541563     0.20000000     0.42861670    -0.11541563 G@;aqe[dB  
Change in Focus                :       0.000000                            0.000000 g?`J,*y  
Irregularity of surface 1 in fringes 7
D^A:f  
TIRR   1            -0.20000000     0.50973587    -0.03429647     0.20000000     0.57333868     0.02930634 ~E\CAZ  
Change in Focus                :       0.000000                            0.000000 iOyYf!yg  
Irregularity of surface 2 in fringes {xr
]xcM'b  
TIRR   2            -0.20000000     0.53400904    -0.01002330     0.20000000     0.55360281     0.00957047 1Li@O[%X<  
Change in Focus                :       0.000000                            0.000000 (o|E@d  
Irregularity of surface 3 in fringes Em7q@  
TIRR   3            -0.20000000     0.58078982     0.03675748     0.20000000     0.49904394    -0.04498840 rx"zqm9 }u  
Change in Focus                :       0.000000                            0.000000 K$Ph$P@  
Index tolerance on surface 1 j{PX ~/
 
TIND   1            -0.00100000     0.52606778    -0.01796456     0.00100000     0.56121811     0.01718578 :)z_q!$j  
Change in Focus                :       0.000000                            0.000000 DjKjEZHgM  
Index tolerance on surface 2 ?-f>zx8O  
TIND   2            -0.00100000     0.55639086     0.01235852     0.00100000     0.53126361    -0.01276872 Yc$|"to  
Change in Focus                :       0.000000                           -0.000000 ,y>Na{@Y  
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Worst offenders: zxh"@j$?  
Type                      Value      Criterion        Change jmFN*VIL  
TSTY   2            -0.20000000     0.35349910    -0.19053324 L`#+ZLo  
TSTY   2             0.20000000     0.35349910    -0.19053324 a:fHTU=\p  
TSTX   2            -0.20000000     0.35349910    -0.19053324 ,uv$oP-  
TSTX   2             0.20000000     0.35349910    -0.19053324 GXfVjC31z
 
TSTY   1            -0.20000000     0.42678383    -0.11724851 r)t^qhn  
TSTY   1             0.20000000     0.42678383    -0.11724851 u!i5Q  
TSTX   1            -0.20000000     0.42678383    -0.11724851 'G

FzI:Xr  
TSTX   1             0.20000000     0.42678383    -0.11724851 AUC< m.  
TSTY   3            -0.20000000     0.42861670    -0.11541563 gY9"!IVe+  
TSTY   3             0.20000000     0.42861670    -0.11541563 coWBKWF  
-db+Y:xUZ  
Estimated Performance Changes based upon Root-Sum-Square method: Trrh`@R  
Nominal MTF                 :     0.54403234 zCHr  
Estimated change            :    -0.36299231 pV7Gh`<y  
Estimated MTF               :     0.18104003 E(@;p%:  
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Compensator Statistics: tX
251S  
Change in back focus: L9T u
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Minimum            :        -0.000000 Cu:Zn%  
Maximum            :         0.000000 =CoT{LRQ_  
Mean               :        -0.000000 K288&D|1WU  
Standard Deviation :         0.000000 {#,FlR2  
FT~^$)8=  
Monte Carlo Analysis: e@OA>  
Number of trials: 20 zqh{=&Tjx  
qj&)w9RLJE  
Initial Statistics: Normal Distribution sD8S2  
9QMn%8=j  
  Trial       Criterion        Change :j~5(K"  
      1     0.42804416    -0.11598818 akQH+j  
Change in Focus                :      -0.400171 %U GlAyj  
      2     0.54384387    -0.00018847 ]D%k)<YK  
Change in Focus                :       1.018470 eEQ[^i  
      3     0.44510003    -0.09893230 kre&J  
Change in Focus                :      -0.601922 $J6.a!5IE  
      4     0.18154684    -0.36248550 B
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Change in Focus                :       0.920681 0Mg8{  
      5     0.28665820    -0.25737414 ~t={ \,X\  
Change in Focus                :       1.253875 ^%&x{F.  
      6     0.21263372    -0.33139862 8(>.^667  
Change in Focus                :      -0.903878 <^U(ya  
      7     0.40051424    -0.14351809 BuTIJb+Q\  
Change in Focus                :      -1.354815 `a>vPW  
      8     0.48754161    -0.05649072  2JP?6N  
Change in Focus                :       0.215922 Yys~p2  
      9     0.40357468    -0.14045766 ]%|WE  
Change in Focus                :       0.281783 Zjg\jo  
     10     0.26315315    -0.28087919 |a{]P=<q  
Change in Focus                :      -1.048393 iwQ-(GjM[A  
     11     0.26120585    -0.28282649 A+I&.\QAR  
Change in Focus                :       1.017611 zXZ'nJ5OGG  
     12     0.24033815    -0.30369419 vLuQe0l{  
Change in Focus                :      -0.109292 ,:4DN&<  
     13     0.37164046    -0.17239188 8[)]3K x  
Change in Focus                :      -0.692430 = O1;vc}AA  
     14     0.48597489    -0.05805744 |*KS<iHr%  
Change in Focus                :      -0.662040 /w M  
     15     0.21462327    -0.32940907 -j_I_  
Change in Focus                :       1.611296 0j(jJAE.  
     16     0.43378226    -0.11025008 nud=uJ"(  
Change in Focus                :      -0.640081 ^,lZ58 2  
     17     0.39321881    -0.15081353 87KrSZ  
Change in Focus                :       0.914906 4|N\Q=,  
     18     0.20692530    -0.33710703 GQ2PmnV+  
Change in Focus                :       0.801607 ]<gCq/V#  
     19     0.51374068    -0.03029165 V<4+g/  
Change in Focus                :       0.947293 P0e""9JOo  
     20     0.38013374    -0.16389860 JA(fam~{  
Change in Focus                :       0.667010 t3t0vWE<,  
[fi'=Cb  
Number of traceable Monte Carlo files generated: 20 -'[(Uzj  
k0_$M{@Y  
Nominal     0.54403234 U}w+`ZLN  
Best        0.54384387    Trial     2 +RV-VrV  
Worst       0.18154684    Trial     4 =kh>s$We  
Mean        0.35770970 6@q[tN7_^  
Std Dev     0.11156454 N4mJU'_{  
HDVl5X`j'  
ie@`S&.8 T  
Compensator Statistics: 0^_
lj9B!  
Change in back focus: PCPf*G>  
Minimum            :        -1.354815 dAr)%RZ
 
Maximum            :         1.611296 =HY1l}\  
Mean               :         0.161872 [W$Z60?RR  
Standard Deviation :         0.869664 1@^Ek8C  
/
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90% >       0.20977951               $i:||L^8p  
80% >       0.22748071               +Y)#yGUn  
50% >       0.38667627               /J.\p/%\  
20% >       0.46553746               :e]9T3Q  
10% >       0.50064115                `{U%[
$<[W  
=+`j?1  
End of Run. 7grt4k  
r1oku0o  
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 w,Zx5bBg%  

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 8b:clvh  
>u5g?yzw  
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                 9jO`gWxV8*  
80% >       0.22748071                 SqXy;S@  
50% >       0.38667627                 (@)2PO/  
20% >       0.46553746                 n .f4z<  
10% >       0.50064115 Q`S iV  
e^k!vk-SLF  
最后这个数值是MTF值呢，还是MTF的公差？ |P~O15V*Q  
By?nd)  
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？？？   #)^^_  
.4Qb5I2#  
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  : Qh*)pt]n  
90% >       0.20977951                 'e F%  
80% >       0.22748071                 '=VH6@vZ_'  
50% >       0.38667627                 Cl,9yU)1n  
20% >       0.46553746                 .}o~VT:!?Y  
10% >       0.50064115 DKX/W+#a  
....... `|nH1sHFq  

AcKU^T+  
oz LH]*  
这些数值都是MTF值

Criterion           : Geometric MTF average S&T at 30.0000 cycles per mm   =~&VdPZ  
Mode                : Sensitivities :_v!#H)  
Sampling            : 2 msiu8E  
Nominal Criterion   : 0.54403234 w8p8 ;@  
Test Wavelength     : 0.6328 + ~"5!  
UbO4%YHt  
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？ Ke!'gohv  
Hkege5{  
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