[求助]关于Effective focal length的问题 [复制链接]

  ZEMAX中priscription data会给出系统的许多有用的数据，其中包括effective focal length的数据和主平面位置的数据。但是我发现直接给出的effective focal length数据和根据其定义结合主平面的数据算出来的结果不一致，这时怎么回事？ # eCj
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一下是我的Prescription Data数据： /F4pb]U!*  
GENERAL LENS DATA: C_4)=#@GU  
4#5:~M }  
Surfaces                :                3 -jn WZ5.  
Stop                    :                1 OM|Fwr$  
System Aperture         : Object Space NA = 0.12 hgLj<  
Glass Catalogs          : Schott \mw(cM#:  
Ray Aiming              : Paraxial Reference, Cache On  ;b`[&g  
X Pupil shift          :               0 ^-rfvc  
Y Pupil shift          :               0 \MK*by  
Z Pupil shift          :               0 +J{0 E  
Apodization             : Gaussian, factor =   1.00000E+000 c-g)eV|)S  
************************************************************* E[O<S B I  
Effective Focal Length  :        1.639158 (in air at system temperature and pressure) NM0tp )h  
Effective Focal Length  :        1.639158 (in image space) OKi\zS  
************************************************************* !<UJ6t}  
Back Focal Length       :       -1.061568 hFk3[zTy  
Total Track             :           4.318 ovwQ2TuK  
Image Space F/#         :        3.417255 f)g7 3=  
Paraxial Working F/#    :        2.950535 V\})3i8  
Working F/#             :        2.961912
`u.t[  
Image Space NA          :       0.1670788 6<N
5_1  
Object Space NA         :            0.12 w,O
,W[C  
Stop Radius             :       0.2398355 xB@|LtdO9;  
Paraxial Image Height   :               0 4n %?Y
Q[t  
Paraxial Magnification  :               0 kN%MP6?J  
Entrance Pupil Diameter :       0.4796709 pSm $FBW h  
Entrance Pupil Position :               0 2_ :n  
Exit Pupil Diameter     :        2.511155 eeHP&1= 7  
Exit Pupil Position     :        7.420935 R-Z~V  
Field Type              : Angle in degrees P
i Fm|  
Maximum Field           :               0 +3a?`Z  
Primary Wave            :            1.31 OiAJ[L  
Lens Units              :   Millimeters 4;HJ;0-ps  
Angular Magnification   :               0 (
ewe"N+  
}BiiE%a  
Fields          : 1 -tnQCwq#  
Field Type: Angle in degrees *]h`KxuO  
#        X-Value        Y-Value         Weight ,jC3Fcly  
1       0.000000       0.000000       1.000000 (YY~{W$w(  
0W3i()  
Vignetting Factors uZZU{U9h  
#       VDX       VDY       VCX       VCY       VAN 4QIE8f Y  
1  0.000000  0.000000  0.000000  0.000000  0.000000 3:{yJdpg  
R/^u/~<  
Wavelengths     : 1 V97,1`  
Units: Microns  49d@!  
#          Value         Weight it>r+%  
1       1.310000       1.000000 }gkM^*$:%  
Hg9CZMko  
CARDINAL POINTS: JT9N!CGZ  
tX!nsm1  
Object space positions are measured with respect to surface 1. EwS!]h?  
Image space positions are measured with respect to the image surface. ~+<olss_  
The index in both the object space and image space is considered. @Kf_z5tm:  
.XkMk|t8  
                          Object Space         Image Space % aUsOB-RV  
W = 1.310000 (Primary) zE)~0v
4  
************************************************************ MG /,==  
Focal Length          :           -1.639015            1.639015 BSq)RV/3  
************************************************************ \uME+NF  
Focal Planes          :            0.313078           -1.159568 k|BHnj  
Principal Planes      :            1.952094           -2.798584 m=Q[\.Ra  
Anti-Principal Planes :           -1.325937            0.479447 m%"uPv\  
Nodal Planes          :            1.952094           -2.798584 p'sc0@}_O  
Anti-Nodal Planes     :           -1.325937            0.479447 c}[+h5  
;Nr]X  
我用*号，标出了需要注意的地方，请高手指教！

各位指点一下吧，自己顶起来！

帮顶！！！！！！！！！！！！！！1

等待高手帮忙吧 我也不会!

看的我头晕了,可能是感冒的缘故吧,以后有机会再探讨

我也不会先看看再说!~

慢慢理解