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？ I9YMxf>nI
一下是我的Prescription Data数据： ZSn6JV'g
GENERAL LENS DATA: X + B=?|M
-uB*E1|Q
Surfaces : 3 =j8g6# 'u
Stop : 1 L7N>p4h]Xj
System Aperture : Object Space NA = 0.12 jtPHk*>^wu
Glass Catalogs : Schott rrl{3
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Ray Aiming : Paraxial Reference, Cache On @Z89cTO
X Pupil shift : 0 9) 'wg I#
Y Pupil shift : 0 BWzo|isv
Z Pupil shift : 0 !
;R}=
Apodization : Gaussian, factor = 1.00000E+000 6}:(m#+
************************************************************* la{o<||Aq
Effective Focal Length : 1.639158 (in air at system temperature and pressure) P]4@|u;=6[
Effective Focal Length : 1.639158 (in image space) !uhh_3RH
************************************************************* :(i=> ~O
Back Focal Length : -1.061568 Zc =#Y
Total Track : 4.318 [-1Yyy1}
Image Space F/# : 3.417255 <#lNi.?.
Paraxial Working F/# : 2.950535 SKJ' 6*6
Working F/# : 2.961912 Fb^, %K:
Image Space NA : 0.1670788 v#9Uy}NJ9
Object Space NA : 0.12 1fV\84m^
Stop Radius : 0.2398355 `12Y2W 9
Paraxial Image Height : 0 =l%|W[OO
Paraxial Magnification : 0 t= n@<1d
Entrance Pupil Diameter : 0.4796709 #$JY &!M
Entrance Pupil Position : 0 B &)wJG
Exit Pupil Diameter : 2.511155 Oma G|2u
Exit Pupil Position : 7.420935 mnM$#%q;%
Field Type : Angle in degrees p:Zhg{sF
Maximum Field : 0 Bacmrf
Primary Wave : 1.31 B`|H }KU
Lens Units : Millimeters jo"zd b
Angular Magnification : 0 =]-D_$S~
}nWW`:t kx
Fields : 1 ?DC;Hk<
Field Type: Angle in degrees SOvo%L @
# X-Value Y-Value Weight (E \lLlN
1 0.000000 0.000000 1.000000 a7e.Z9k!
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Vignetting Factors dhi9=Co;
# VDX VDY VCX VCY VAN <#e!kWGR?
1 0.000000 0.000000 0.000000 0.000000 0.000000 \C`2z]V %
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Wavelengths : 1 vVH*\&H\T
Units: Microns *"j3x}
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# Value Weight
II(P
1 1.310000 1.000000 D=~3N
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CARDINAL POINTS: <s5s<q2
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Object space positions are measured with respect to surface 1. k j!mgu#T
Image space positions are measured with respect to the image surface. | $c~Jq
The index in both the object space and image space is considered. L_fiE3G|>
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Object Space Image Space vtXZ`[D,l)
W = 1.310000 (Primary)
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************************************************************ J\\o# -H
Focal Length : -1.639015 1.639015 ^vo ]bq7
************************************************************ ;V4f6[<]'z
Focal Planes : 0.313078 -1.159568 4|KtsAVp{
Principal Planes : 1.952094 -2.798584 # |,c3$
Anti-Principal Planes : -1.325937 0.479447 V e4@^Jy;
Nodal Planes : 1.952094 -2.798584 e ",0Er FT
Anti-Nodal Planes : -1.325937 0.479447 @%[
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我用*号，标出了需要注意的地方，请高手指教！
