[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 J 48$l(l3  
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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 b<"jmB{  
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图片:2.jpg

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然后运行分析的结果如下： BxQ,T@  
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Analysis of Tolerances 2:nI4S  
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File : E:\光学设计资料\zemax练习\f500.ZMX L?&&4%%  
Title: FDGG$z?>m  
Date : TUE JUN 21 2011 `GCK%evLG  
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Units are Millimeters. S0r+Y0J]<  
All changes are computed using linear differences. &_hEM~{  
Iu >4+6  
Paraxial Focus compensation only. @qx$b~%  
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WARNING: Solves should be removed prior to tolerancing. $}z/BV1I  
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Mnemonics: ssoE,6kS  
TFRN: Tolerance on curvature in fringes. BB(v,W  
TTHI: Tolerance on thickness. u$(ei2f  
TSDX: Tolerance on surface decentering in x. .P?n<n#  
TSDY: Tolerance on surface decentering in y. Vx>Q  
TSTX: Tolerance on surface tilt in x (degrees). Yw5-:w0f  
TSTY: Tolerance on surface tilt in y (degrees). _p'@.P  
TIRR: Tolerance on irregularity (fringes). ,\a
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TIND: Tolerance on Nd index of refraction. EIyFGCw|U  
TEDX: Tolerance on element decentering in x. IA]wO%c  
TEDY: Tolerance on element decentering in y. u7Ix7`
V  
TETX: Tolerance on element tilt in x (degrees). U0{)goN.  
TETY: Tolerance on element tilt in y (degrees). _VmXs&4  
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WARNING: RAY AIMING IS OFF. Very loose tolerances may not be computed accurately. 6
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WARNING: Boundary constraints on compensators will be ignored. i?uX'apk  
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Criterion           : Geometric MTF average S&T at 30.0000 cycles per mm "Jg.)1Jw  
Mode                : Sensitivities >7~*j4g  
Sampling            : 2 -/0\_zq7  
Nominal Criterion   : 0.54403234 5;^1Ab0  
Test Wavelength     : 0.6328 84W
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I.T?A9Z  
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Fields: XY Symmetric Angle in degrees S_OtY]gF  
#      X-Field      Y-Field       Weight    VDX    VDY    VCX    VCY 2/uZ2
N|S  
1   0.000E+000   0.000E+000   1.000E+000  0.000  0.000  0.000  0.000 0chpC)#Q3;  
']+!i a  
Sensitivity Analysis: $e--"@[Y  
gTOx|bx  
                 |----------------- Minimum ----------------| |----------------- Maximum ----------------| ju"?b2f  
Type                      Value      Criterion        Change          Value      Criterion        Change bM:4i1Z  
Fringe tolerance on surface 1 ^,AE;ZT7  
TFRN   1            -1.00000000     0.54257256    -0.00145977     1.00000000     0.54548607     0.00145374 6-TYOUm  
Change in Focus                :      -0.000000                            0.000000 bu_@A^ys  
Fringe tolerance on surface 2 {f)aFGp  
TFRN   2            -1.00000000     0.54177471    -0.00225762     1.00000000     0.54627463     0.00224230 n8_X<jIp3  
Change in Focus                :       0.000000                            0.000000 &ZkJ,-  
Fringe tolerance on surface 3 oq!\100
 
TFRN   3            -1.00000000     0.54779866     0.00376632     1.00000000     0.54022572    -0.00380662 h-;> v.  
Change in Focus                :      -0.000000                            0.000000 &|
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Thickness tolerance on surface 1 g'7\WQ  
TTHI   1   3        -0.20000000     0.54321462    -0.00081772     0.20000000     0.54484759     0.00081525 sCzpNJ"8  
Change in Focus                :       0.000000                            0.000000 N0kCdJv  
Thickness tolerance on surface 2 rOt{bh6r  
TTHI   2   3        -0.20000000     0.54478712     0.00075478     0.20000000     0.54327558    -0.00075675 r,0D I  
Change in Focus                :       0.000000                           -0.000000 vfv?QjR  
Decenter X tolerance on surfaces 1 through 3 ]?D$n  
TEDX   1   3        -0.20000000     0.54401464   -1.7700E-005     0.20000000     0.54401464   -1.7700E-005 /}>8|#U3y  
Change in Focus                :       0.000000                            0.000000 Ao
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Decenter Y tolerance on surfaces 1 through 3 fx(8 o+  
TEDY   1   3        -0.20000000     0.54401464   -1.7700E-005     0.20000000     0.54401464   -1.7700E-005 ]w;t0Bk  
Change in Focus                :       0.000000                            0.000000 m[2[9bQ0  
Tilt X tolerance on surfaces 1 through 3 (degrees) U2<q dknB  
TETX   1   3        -0.20000000     0.54897548     0.00494314     0.20000000     0.54897548     0.00494314 [qRww]g;P|  
Change in Focus                :       0.000000                            0.000000 ^[HUtq  
Tilt Y tolerance on surfaces 1 through 3 (degrees) *qSvSY*  
TETY   1   3        -0.20000000     0.54897548     0.00494314     0.20000000     0.54897548     0.00494314 ojf6@p_  
Change in Focus                :       0.000000                            0.000000 K
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Decenter X tolerance on surface 1 pqpsa'  
TSDX   1            -0.20000000     0.53999563    -0.00403671     0.20000000     0.53999563    -0.00403671 Ezew@*(  
Change in Focus                :       0.000000                            0.000000 UsU
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Decenter Y tolerance on surface 1 KNQj U-A  
TSDY   1            -0.20000000     0.53999563    -0.00403671     0.20000000     0.53999563    -0.00403671 t855|  
Change in Focus                :       0.000000                            0.000000 Ayqs~&{  
Tilt X tolerance on surface (degrees) 1 2INpo  
TSTX   1            -0.20000000     0.42678383    -0.11724851     0.20000000     0.42678383    -0.11724851 F#<:ZByjJ@  
Change in Focus                :       0.000000                            0.000000 ]] 0M  
Tilt Y tolerance on surface (degrees) 1 TK' 5NM+4  
TSTY   1            -0.20000000     0.42678383    -0.11724851     0.20000000     0.42678383    -0.11724851 I F!xZ6X8  
Change in Focus                :       0.000000                            0.000000 44P [P{y  
Decenter X tolerance on surface 2 Vfy@?x= &  
TSDX   2            -0.20000000     0.51705427    -0.02697807     0.20000000     0.51705427    -0.02697807 z$%8'  
Change in Focus                :       0.000000                            0.000000 @"fv[=Xb  
Decenter Y tolerance on surface 2 MDIPoS3BRa  
TSDY   2            -0.20000000     0.51705427    -0.02697807     0.20000000     0.51705427    -0.02697807 t-C|x)J+  
Change in Focus                :       0.000000                            0.000000 U ^O4HJ  
Tilt X tolerance on surface (degrees) 2 ZR3,dW6S  
TSTX   2            -0.20000000     0.35349910    -0.19053324     0.20000000     0.35349910    -0.19053324 
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Change in Focus                :       0.000000                            0.000000 2@Nd02v|  
Tilt Y tolerance on surface (degrees) 2 <$A/ ('  
TSTY   2            -0.20000000     0.35349910    -0.19053324     0.20000000     0.35349910    -0.19053324 JP\jhkn  
Change in Focus                :       0.000000                            0.000000 zB+e;x f|  
Decenter X tolerance on surface 3 [Fag\/Y+  
TSDX   3            -0.20000000     0.53419039    -0.00984195     0.20000000     0.53419039    -0.00984195 o!+'<IQ'  
Change in Focus                :       0.000000                            0.000000 RF2I_4  
Decenter Y tolerance on surface 3 [W$Mn.5<s  
TSDY   3            -0.20000000     0.53419039    -0.00984195     0.20000000     0.53419039    -0.00984195 7)#JrpTj%  
Change in Focus                :       0.000000                            0.000000 Kzq^f=p  
Tilt X tolerance on surface (degrees) 3 9$X" D  
TSTX   3            -0.20000000     0.42861670    -0.11541563     0.20000000     0.42861670    -0.11541563 o?M;f\Fy  
Change in Focus                :       0.000000                            0.000000 R7z @y o  
Tilt Y tolerance on surface (degrees) 3 K9&Q@3V  
TSTY   3            -0.20000000     0.42861670    -0.11541563     0.20000000     0.42861670    -0.11541563 R'B_YKHBY  
Change in Focus                :       0.000000                            0.000000 &_;=]ts  
Irregularity of surface 1 in fringes Wy6a4oY  
TIRR   1            -0.20000000     0.50973587    -0.03429647     0.20000000     0.57333868     0.02930634 o(54 A['  
Change in Focus                :       0.000000                            0.000000 It/'R-H  
Irregularity of surface 2 in fringes dly -mPmP  
TIRR   2            -0.20000000     0.53400904    -0.01002330     0.20000000     0.55360281     0.00957047 {y@8E>y5$  
Change in Focus                :       0.000000                            0.000000 zD8$DG8  
Irregularity of surface 3 in fringes 6A>bm{`c:  
TIRR   3            -0.20000000     0.58078982     0.03675748     0.20000000     0.49904394    -0.04498840 o%lxEd r  
Change in Focus                :       0.000000                            0.000000 _f>)G3p  
Index tolerance on surface 1 p_n$}z  
TIND   1            -0.00100000     0.52606778    -0.01796456     0.00100000     0.56121811     0.01718578 nZNS}|6  
Change in Focus                :       0.000000                            0.000000 NhYUSk ~u  
Index tolerance on surface 2 Fpn'0&~-fi  
TIND   2            -0.00100000     0.55639086     0.01235852     0.00100000     0.53126361    -0.01276872 ]1GyEr:  
Change in Focus                :       0.000000                           -0.000000 A -8]4p::  
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Worst offenders: OO
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Type                      Value      Criterion        Change WyQ8}]1b  
TSTY   2            -0.20000000     0.35349910    -0.19053324 Ei<+{P(t0  
TSTY   2             0.20000000     0.35349910    -0.19053324 $OGMw+$C^  
TSTX   2            -0.20000000     0.35349910    -0.19053324 %Y|AXxR  
TSTX   2             0.20000000     0.35349910    -0.19053324 Pq-@waH3  
TSTY   1            -0.20000000     0.42678383    -0.11724851 ojj T  
TSTY   1             0.20000000     0.42678383    -0.11724851 3|3ad'  
TSTX   1            -0.20000000     0.42678383    -0.11724851 wc}x [cS  
TSTX   1             0.20000000     0.42678383    -0.11724851 xTcY&   
TSTY   3            -0.20000000     0.42861670    -0.11541563 ">fRM=fl  
TSTY   3             0.20000000     0.42861670    -0.11541563 oc-o>H  
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Estimated Performance Changes based upon Root-Sum-Square method: )kKeA  
Nominal MTF                 :     0.54403234 4l/~::y  
Estimated change            :    -0.36299231 ^:O*Sx.CA  
Estimated MTF               :     0.18104003 (YmIui>  
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Compensator Statistics: 8L@@UUjr  
Change in back focus: N=8CVI  
Minimum            :        -0.000000 lrMkp@f.  
Maximum            :         0.000000 *9r 32]i;  
Mean               :        -0.000000 q| *nd!y'  
Standard Deviation :         0.000000 p1ER<_fp  
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Monte Carlo Analysis: K~8!Gh{h]  
Number of trials: 20 pl 1CEoe  
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Initial Statistics: Normal Distribution ljh,%#95=  
34vH+,!u  
  Trial       Criterion        Change Sa6YqOel@  
      1     0.42804416    -0.11598818 Ti5"a<R4m6  
Change in Focus                :      -0.400171 .ityudT<  
      2     0.54384387    -0.00018847 hN1{?PQ  
Change in Focus                :       1.018470 r
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      3     0.44510003    -0.09893230 o6:p2W  
Change in Focus                :      -0.601922 B|BJkY'  
      4     0.18154684    -0.36248550 bEzy KrN\  
Change in Focus                :       0.920681 55x.Q  
      5     0.28665820    -0.25737414 RYX=;n  
Change in Focus                :       1.253875 d[KG0E5`  
      6     0.21263372    -0.33139862 t*!Q9GC_  
Change in Focus                :      -0.903878 cU=EXyP%  
      7     0.40051424    -0.14351809 q?Mmkh)g  
Change in Focus                :      -1.354815 Y3f2RdGl  
      8     0.48754161    -0.05649072 a 1pa#WC  
Change in Focus                :       0.215922 j&=!F3[  
      9     0.40357468    -0.14045766 km!jxs  
Change in Focus                :       0.281783 J$i5A9IUr  
     10     0.26315315    -0.28087919 [,p[%Dza  
Change in Focus                :      -1.048393 'd=B{7k@  
     11     0.26120585    -0.28282649 HA(
G q  
Change in Focus                :       1.017611 -*C+z!?BP  
     12     0.24033815    -0.30369419 _n_|skG  
Change in Focus                :      -0.109292 "EC,#$e%ev  
     13     0.37164046    -0.17239188 5J8U] :Y)  
Change in Focus                :      -0.692430 ?i7}d@636  
     14     0.48597489    -0.05805744 +&hd3  
Change in Focus                :      -0.662040 %,G0)t   
     15     0.21462327    -0.32940907 Zo|# ,AdE>  
Change in Focus                :       1.611296 x0_$,Tz@  
     16     0.43378226    -0.11025008 .#y.:Pb|e  
Change in Focus                :      -0.640081  \>*B  
     17     0.39321881    -0.15081353 PF?tEw_WB  
Change in Focus                :       0.914906 0(!D1G{ul  
     18     0.20692530    -0.33710703 *XZlnO  
Change in Focus                :       0.801607 !4B($]t  
     19     0.51374068    -0.03029165  &(Ot
(.  
Change in Focus                :       0.947293 TS{ycGY  
     20     0.38013374    -0.16389860 w8df-]r  
Change in Focus                :       0.667010 Una7O]  
]N+(SU  
Number of traceable Monte Carlo files generated: 20 g~JN"ap  
$($26g  
Nominal     0.54403234 |i7j}i  
Best        0.54384387    Trial     2 9$pQ|e0t
J  
Worst       0.18154684    Trial     4 S0 AaJty  
Mean        0.35770970 :NJ(QkTZv  
Std Dev     0.11156454 8
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G92Ya^`  
IOx9".  
Compensator Statistics: i+)9ItZr  
Change in back focus: [h>RO55e  
Minimum            :        -1.354815 e==}qQ  
Maximum            :         1.611296 CXr]V"X9  
Mean               :         0.161872 WxB}Uh  
Standard Deviation :         0.869664 ]D@_cxud3  
Q,# )  
90% >       0.20977951               t7"vAjZU  
80% >       0.22748071               lC8DhRd0_  
50% >       0.38667627               [J'O5"T  
20% >       0.46553746               y my/`%  
10% >       0.50064115                p,hDZea  
3_:J`xX(4  
End of Run. 'gDhi!h%  
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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 vR X_}`m8#  

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 8CR b6  
9ZbT41  
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                 .paKV"LJ  
80% >       0.22748071                 8-s7^*!  
50% >       0.38667627                 DG%vEM,y  
20% >       0.46553746                 @N tiT,3k  
10% >       0.50064115 z CS.P.$  

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最后这个数值是MTF值呢，还是MTF的公差？ ~Av
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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？？？   3xhGmD\SKO  
sGAOK%28  
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  : !a7YM4D  
90% >       0.20977951                  (2dkmn  
80% >       0.22748071                 /_V4gwb}|-  
50% >       0.38667627                 'R nvQ""  
20% >       0.46553746                 =kBWY9:$,  
10% >       0.50064115 RwoAZ]Zg]  
....... ]owcx=5q%'  

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UW],9r/PD@  
这些数值都是MTF值

Criterion           : Geometric MTF average S&T at 30.0000 cycles per mm   AxiCpAS;J  
Mode                : Sensitivities ;s w3MRJ  
Sampling            : 2 Ya ~lPc  
Nominal Criterion   : 0.54403234 T#=&oy7  
Test Wavelength     : 0.6328 V w5@)l*f  
r&O:Bt}x  
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？ nuLxOd*n  
 -TKQfd  
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