[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 <5ULu(b&$  
*F(<:
3;2  

图片:1.JPG

G2|G}#E  
U2Ky4UFm  
然后添加了默认公差分析，基本没变 7s}F`fjKP  
X1V~.kvt)  

图片:2.jpg

O%&N6U  
aouYPxA`  
然后运行分析的结果如下： !l6ht{  
ps/|^8aGZ  
Analysis of Tolerances }ZiJHj'<  
6IJ;od.\b$  
File : E:\光学设计资料\zemax练习\f500.ZMX ?TmVLny  
Title: I0^oaccM  
Date : TUE JUN 21 2011 {q;_Dd  
E^pn-rB  
Units are Millimeters. 3z"%ht~;  
All changes are computed using linear differences. tejpY
 
"`a,/h'  
Paraxial Focus compensation only. a [f}-t9  
*Rc?rMF!  
WARNING: Solves should be removed prior to tolerancing. E?Qg'|+_  
Uqly|FS &n  
Mnemonics: q+w] Xs;  
TFRN: Tolerance on curvature in fringes. N7;kWQH  
TTHI: Tolerance on thickness. ]/[@.   
TSDX: Tolerance on surface decentering in x. z38Pi  
TSDY: Tolerance on surface decentering in y. Ch~y;C&e+r  
TSTX: Tolerance on surface tilt in x (degrees). 2mO9  
TSTY: Tolerance on surface tilt in y (degrees). Fa#5a'}I  
TIRR: Tolerance on irregularity (fringes). 'Q.
5`o  
TIND: Tolerance on Nd index of refraction. byZj7q5&Q  
TEDX: Tolerance on element decentering in x. ,E+\SBQS_  
TEDY: Tolerance on element decentering in y. q)YHhH\  
TETX: Tolerance on element tilt in x (degrees). *WWDwY@!u  
TETY: Tolerance on element tilt in y (degrees). G('UF1F  
Q7mikg=1-  
WARNING: RAY AIMING IS OFF. Very loose tolerances may not be computed accurately. %GMCyT  
z`]:\j'O3"  
WARNING: Boundary constraints on compensators will be ignored. v.gAi6  
CXi:?6OG  
Criterion           : Geometric MTF average S&T at 30.0000 cycles per mm b,(<74!#8  
Mode                : Sensitivities DKl\N~{F  
Sampling            : 2 N[yS heT  
Nominal Criterion   : 0.54403234 IhK%.B{dZ  
Test Wavelength     : 0.6328 98UI]? 4  
Kzwe36O;?  
UHIXy#+o5  
Fields: XY Symmetric Angle in degrees E*+]Iq1u  
#      X-Field      Y-Field       Weight    VDX    VDY    VCX    VCY _+%p!!  
1   0.000E+000   0.000E+000   1.000E+000  0.000  0.000  0.000  0.000 jd}~#:FUr*  
tS,AS,vy]  
Sensitivity Analysis: I.%EYAai  
m\|E
M'@k  
                 |----------------- Minimum ----------------| |----------------- Maximum ----------------| ~cfvL*~5  
Type                      Value      Criterion        Change          Value      Criterion        Change xi)M8\K  
Fringe tolerance on surface 1 5mm&l+N)  
TFRN   1            -1.00000000     0.54257256    -0.00145977     1.00000000     0.54548607     0.00145374 }0OQm?xh  
Change in Focus                :      -0.000000                            0.000000 Nfmr5MU_  
Fringe tolerance on surface 2 (/i|3P  
TFRN   2            -1.00000000     0.54177471    -0.00225762     1.00000000     0.54627463     0.00224230 (>*L-&-  
Change in Focus                :       0.000000                            0.000000 UGoB7TEfn  
Fringe tolerance on surface 3 Z)}2bJwA  
TFRN   3            -1.00000000     0.54779866     0.00376632     1.00000000     0.54022572    -0.00380662 %+C6#cj  
Change in Focus                :      -0.000000                            0.000000 ^<j =.E  
Thickness tolerance on surface 1 U.N&~S  
TTHI   1   3        -0.20000000     0.54321462    -0.00081772     0.20000000     0.54484759     0.00081525 V7 hO}  
Change in Focus                :       0.000000                            0.000000 veS) j?4  
Thickness tolerance on surface 2 !0v3Lu~j  
TTHI   2   3        -0.20000000     0.54478712     0.00075478     0.20000000     0.54327558    -0.00075675 6ywOL'OBM  
Change in Focus                :       0.000000                           -0.000000 X
*&Thmee  
Decenter X tolerance on surfaces 1 through 3 C!Fi&~  
TEDX   1   3        -0.20000000     0.54401464   -1.7700E-005     0.20000000     0.54401464   -1.7700E-005 >U]KPL[%  
Change in Focus                :       0.000000                            0.000000 bj?=\u  
Decenter Y tolerance on surfaces 1 through 3 r(zn1;zl  
TEDY   1   3        -0.20000000     0.54401464   -1.7700E-005     0.20000000     0.54401464   -1.7700E-005 Y&$puiH-j  
Change in Focus                :       0.000000                            0.000000 /9?yw!  
Tilt X tolerance on surfaces 1 through 3 (degrees) (!9+QXb'  
TETX   1   3        -0.20000000     0.54897548     0.00494314     0.20000000     0.54897548     0.00494314 _k(&<
1i  
Change in Focus                :       0.000000                            0.000000 SPtx_+ Q)S  
Tilt Y tolerance on surfaces 1 through 3 (degrees) zV"'-iP  
TETY   1   3        -0.20000000     0.54897548     0.00494314     0.20000000     0.54897548     0.00494314 ?&VKZSo  
Change in Focus                :       0.000000                            0.000000 YuoIhT  
Decenter X tolerance on surface 1 "@Qg]#]JH  
TSDX   1            -0.20000000     0.53999563    -0.00403671     0.20000000     0.53999563    -0.00403671 +IlQZwm~  
Change in Focus                :       0.000000                            0.000000 *\`<=,H6<  
Decenter Y tolerance on surface 1 G"Hj$  
TSDY   1            -0.20000000     0.53999563    -0.00403671     0.20000000     0.53999563    -0.00403671 U~oGg$  
Change in Focus                :       0.000000                            0.000000 JX#0<U|L  
Tilt X tolerance on surface (degrees) 1 \\`(x:\  
TSTX   1            -0.20000000     0.42678383    -0.11724851     0.20000000     0.42678383    -0.11724851 r,P`$-  
Change in Focus                :       0.000000                            0.000000 va0}?fy.O%  
Tilt Y tolerance on surface (degrees) 1 ?Q"1zcX  
TSTY   1            -0.20000000     0.42678383    -0.11724851     0.20000000     0.42678383    -0.11724851 gE8>o:6)6:  
Change in Focus                :       0.000000                            0.000000 8cuI-Swz  
Decenter X tolerance on surface 2 ENFM``dV#  
TSDX   2            -0.20000000     0.51705427    -0.02697807     0.20000000     0.51705427    -0.02697807 ^^*Ia'9   
Change in Focus                :       0.000000                            0.000000 rs
hUF  
Decenter Y tolerance on surface 2 WDt6{5T  
TSDY   2            -0.20000000     0.51705427    -0.02697807     0.20000000     0.51705427    -0.02697807 V$dhi
P z  
Change in Focus                :       0.000000                            0.000000 SUjo%3R  
Tilt X tolerance on surface (degrees) 2 _SU6Bd/>  
TSTX   2            -0.20000000     0.35349910    -0.19053324     0.20000000     0.35349910    -0.19053324 y8} /e@&  
Change in Focus                :       0.000000                            0.000000 eAG)+b  
Tilt Y tolerance on surface (degrees) 2 3h}i="i  
TSTY   2            -0.20000000     0.35349910    -0.19053324     0.20000000     0.35349910    -0.19053324 MXDUKh7v3  
Change in Focus                :       0.000000                            0.000000 Q2* ~9QkU  
Decenter X tolerance on surface 3 f|~X}R  
TSDX   3            -0.20000000     0.53419039    -0.00984195     0.20000000     0.53419039    -0.00984195 |AS<I4+&  
Change in Focus                :       0.000000                            0.000000 .=9d3uWJ/  
Decenter Y tolerance on surface 3 9q\_
UbF  
TSDY   3            -0.20000000     0.53419039    -0.00984195     0.20000000     0.53419039    -0.00984195 6.6?Rp".  
Change in Focus                :       0.000000                            0.000000 2)-4?uz~  
Tilt X tolerance on surface (degrees) 3 NnaO!QW%  
TSTX   3            -0.20000000     0.42861670    -0.11541563     0.20000000     0.42861670    -0.11541563 m
!]J{OGG:  
Change in Focus                :       0.000000                            0.000000 SnM^T(gtS3  
Tilt Y tolerance on surface (degrees) 3 QuC_sFP10  
TSTY   3            -0.20000000     0.42861670    -0.11541563     0.20000000     0.42861670    -0.11541563 V~do6[(  
Change in Focus                :       0.000000                            0.000000 Gz(l~!n~a  
Irregularity of surface 1 in fringes eDvh3Y<D  
TIRR   1            -0.20000000     0.50973587    -0.03429647     0.20000000     0.57333868     0.02930634 g2A#BMe'.$  
Change in Focus                :       0.000000                            0.000000 Rgl cd  
Irregularity of surface 2 in fringes 1X9J[5|ll  
TIRR   2            -0.20000000     0.53400904    -0.01002330     0.20000000     0.55360281     0.00957047 l\|sHn/  
Change in Focus                :       0.000000                            0.000000 dEW= V"W  
Irregularity of surface 3 in fringes M0`1o p1  
TIRR   3            -0.20000000     0.58078982     0.03675748     0.20000000     0.49904394    -0.04498840 $xjfW/k?M  
Change in Focus                :       0.000000                            0.000000 '6L@l  
Index tolerance on surface 1 =r3g:j/>q  
TIND   1            -0.00100000     0.52606778    -0.01796456     0.00100000     0.56121811     0.01718578 F_4Et  
Change in Focus                :       0.000000                            0.000000 RF~G{wz  
Index tolerance on surface 2 3{wuifS  
TIND   2            -0.00100000     0.55639086     0.01235852     0.00100000     0.53126361    -0.01276872 9mjJC  
Change in Focus                :       0.000000                           -0.000000 <5}j(jxz}  
po.QM/b \  
Worst offenders: 4t>
"-/  
Type                      Value      Criterion        Change *p9k> )'J  
TSTY   2            -0.20000000     0.35349910    -0.19053324 !T 9CpIM%  
TSTY   2             0.20000000     0.35349910    -0.19053324 ^)C#  
TSTX   2            -0.20000000     0.35349910    -0.19053324 G2-0r.f
 
TSTX   2             0.20000000     0.35349910    -0.19053324 9~jS_Y)"  
TSTY   1            -0.20000000     0.42678383    -0.11724851 /vu]ch  
TSTY   1             0.20000000     0.42678383    -0.11724851 n~tb z"&  
TSTX   1            -0.20000000     0.42678383    -0.11724851 ukRmjHbLf  
TSTX   1             0.20000000     0.42678383    -0.11724851 tD4-Llj6  
TSTY   3            -0.20000000     0.42861670    -0.11541563 >Psq" Xj  
TSTY   3             0.20000000     0.42861670    -0.11541563 ($W%&(:/  
[jrfh>v  
Estimated Performance Changes based upon Root-Sum-Square method: MH0wpHz  
Nominal MTF                 :     0.54403234 v5U'ky:  
Estimated change            :    -0.36299231 i'\-Y]?[  
Estimated MTF               :     0.18104003 .tQ(q=#  
'yV*eG?^&  
Compensator Statistics: /XU
=l0u  
Change in back focus: Kf_xKW)^  
Minimum            :        -0.000000 0)ZLdF_6  
Maximum            :         0.000000 16 \)C/*  
Mean               :        -0.000000 2 )3oX  
Standard Deviation :         0.000000 kE|x'(x  
p1("  
Monte Carlo Analysis: _x^rHADp  
Number of trials: 20 I5`>XfO)  
bbDm6,  
Initial Statistics: Normal Distribution oJ`=ob4WDo  
V`HnFAW  
  Trial       Criterion        Change t)rPXvx}!  
      1     0.42804416    -0.11598818 7S=,#  
Change in Focus                :      -0.400171 4:pgZz!  
      2     0.54384387    -0.00018847 7AWq3i{  
Change in Focus                :       1.018470 bOp%  
      3     0.44510003    -0.09893230 4=;j.=>0X  
Change in Focus                :      -0.601922 P"]l/  
      4     0.18154684    -0.36248550 #,1z=/d.  
Change in Focus                :       0.920681 0,Ib74N'w  
      5     0.28665820    -0.25737414 a'.7)f[g}  
Change in Focus                :       1.253875 kGYsjhL\d  
      6     0.21263372    -0.33139862 `"<hO 'WU  
Change in Focus                :      -0.903878 md!!$+a%|  
      7     0.40051424    -0.14351809 9Oo`4  
Change in Focus                :      -1.354815 [IAk9B.\  
      8     0.48754161    -0.05649072 V>GJO(9  
Change in Focus                :       0.215922 5SmJ'zFO  
      9     0.40357468    -0.14045766 foL4s
;2  
Change in Focus                :       0.281783 hw*u.46  
     10     0.26315315    -0.28087919 }pnp._j  
Change in Focus                :      -1.048393 {2q0Ko<  
     11     0.26120585    -0.28282649 aw~h03R_Z  
Change in Focus                :       1.017611 ^S?f"''y3  
     12     0.24033815    -0.30369419 x
%HxM~&  
Change in Focus                :      -0.109292 Gf:dN_e6.  
     13     0.37164046    -0.17239188 5`gVziS!S  
Change in Focus                :      -0.692430 ,2+d+Zuh  
     14     0.48597489    -0.05805744 MNb9~kM  
Change in Focus                :      -0.662040 $5&~gHc,  
     15     0.21462327    -0.32940907 I,HtW),  
Change in Focus                :       1.611296 V\opC6*L_e  
     16     0.43378226    -0.11025008 !H{>c@i  
Change in Focus                :      -0.640081 O:pg+o&  
     17     0.39321881    -0.15081353 DT)][V^w  
Change in Focus                :       0.914906 k;2.g$)W[c  
     18     0.20692530    -0.33710703 <>Dw8?O  
Change in Focus                :       0.801607 YRr,{[e  
     19     0.51374068    -0.03029165 $xq04ejJ  
Change in Focus                :       0.947293 d_0(;'
 
     20     0.38013374    -0.16389860 UK1)U)*+  
Change in Focus                :       0.667010 .:B>xg~2  
DHx&%]r;D  
Number of traceable Monte Carlo files generated: 20 P8|ANe1 v  
AI#.+PrC{/  
Nominal     0.54403234 "5O>egt  
Best        0.54384387    Trial     2 EltCtfm`  
Worst       0.18154684    Trial     4 l^B4.1rT  
Mean        0.35770970 vyB{35p$  
Std Dev     0.11156454 @:#J^CsM+'  
#7}M\\$M  
t u{~:Z(  
Compensator Statistics: zUZET'Bm9  
Change in back focus: CSq|R-@<U  
Minimum            :        -1.354815 ?Tu=-ppw  
Maximum            :         1.611296 KG9-ac  
Mean               :         0.161872 gsM^Pu09ud  
Standard Deviation :         0.869664 NA'45}fQ  
{;& U5<NO  
90% >       0.20977951               [rK`BnJX  
80% >       0.22748071               q(^iT~}  
50% >       0.38667627               js"5{w&  
20% >       0.46553746               wVnmT94  
10% >       0.50064115                >/Q^.hzd  
|YyNqwP`,  
End of Run. "kBVHy  
cfa1"u""e  
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 G/~gF7  

图片:3.JPG

6 R})KIG  
CI-za !
T  
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 
{6:*c
  
vt*  
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                 -k8sR1(  
80% >       0.22748071                 >uq0}HB$a  
50% >       0.38667627                 C12V_)~2  
20% >       0.46553746                 !o_eK\p  
10% >       0.50064115 Komdz/g  
``VE<:2+  
最后这个数值是MTF值呢，还是MTF的公差？ 6?<lS.s  
ov,s]g83  
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？？？   5!qf{4j  
!'F1Ht  
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  : :3Q:pKg  
90% >       0.20977951                 IW<rmP=R&  
80% >       0.22748071                 7:vl -ZW  
50% >       0.38667627                 .cs x"JC  
20% >       0.46553746                 "]]LQb$  
10% >       0.50064115 p )JR5z  
....... =T2SJ)  

oz=ULPZ%  
_dk[k@5W{'  
这些数值都是MTF值

Criterion           : Geometric MTF average S&T at 30.0000 cycles per mm   w"[T  
Mode                : Sensitivities %zGv+H?  
Sampling            : 2 FNLS=4  
Nominal Criterion   : 0.54403234 l59\Lo:  
Test Wavelength     : 0.6328 AeEdqX)  
oc,I,v  
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？ ;[ Dxk$"  
1\@PrO35J  
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