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？ 9ldv*9v
一下是我的Prescription Data数据： `7 [z% cuK
GENERAL LENS DATA: @i U@JE`C
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Surfaces : 3 -^yb[b,
Stop : 1 L|A}A[ P
System Aperture : Object Space NA = 0.12 AwN7/M~'
Glass Catalogs : Schott }8`W%_Yk
Ray Aiming : Paraxial Reference, Cache On
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X Pupil shift : 0 }coSMTMv6
Y Pupil shift : 0 O eLM*Zi
Z Pupil shift : 0 ^E{M[;sF3y
Apodization : Gaussian, factor = 1.00000E+000 Y">m g=B
************************************************************* w/ &)mm{
Effective Focal Length : 1.639158 (in air at system temperature and pressure) 3D|Y4OM
Effective Focal Length : 1.639158 (in image space) Xf o3fW)s
************************************************************* R9bsl.e
Back Focal Length : -1.061568 HtY0=r
Total Track : 4.318 $=3&qg"!
Image Space F/# : 3.417255 Va"H.]
Paraxial Working F/# : 2.950535 b|jdYJbol&
Working F/# : 2.961912 ,41Z_h
Image Space NA : 0.1670788 TkHyXOk"Ky
Object Space NA : 0.12 |[qq
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Stop Radius : 0.2398355 4
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Paraxial Image Height : 0 3h N?l
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Paraxial Magnification : 0 D_kz'0^|
Entrance Pupil Diameter : 0.4796709 %8C,9q
Entrance Pupil Position : 0 c$fi 3O
Exit Pupil Diameter : 2.511155 YvA@I|..~
Exit Pupil Position : 7.420935 CWKN0HB
Field Type : Angle in degrees dZ^(e0& :H
Maximum Field : 0 : :?,ZA
Primary Wave : 1.31 }#'I,?_k
Lens Units : Millimeters ygI81\ D
Angular Magnification : 0 4PdJ
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Fields : 1 *S _[8L"
Field Type: Angle in degrees q-?
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# X-Value Y-Value Weight n`v;S>aT
1 0.000000 0.000000 1.000000 \<n 9kwU
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Vignetting Factors *49({TD6`
# VDX VDY VCX VCY VAN /w[B,_ZKTk
1 0.000000 0.000000 0.000000 0.000000 0.000000 cl \Gh
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Wavelengths : 1 (_2Iu%F
Units: Microns M( eu wy
# Value Weight &ZyZmB
1 1.310000 1.000000 "Sx}7?8AB
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CARDINAL POINTS: d;:H#F+ (
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Object space positions are measured with respect to surface 1. Ku 'OM6D<
Image space positions are measured with respect to the image surface. WF#3'"I
The index in both the object space and image space is considered. '>"riEk
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Object Space Image Space 0XgJCvMcB
W = 1.310000 (Primary) 8,VX%CS#q
************************************************************ S{uKm1a
Focal Length : -1.639015 1.639015 <t~RGn3
************************************************************ 2D'b7zPJ3
Focal Planes : 0.313078 -1.159568 HLL:nczj
Principal Planes : 1.952094 -2.798584 .@5Ro D[ o
Anti-Principal Planes : -1.325937 0.479447 27"M]17)
Nodal Planes : 1.952094 -2.798584 K zgW+6*G
Anti-Nodal Planes : -1.325937 0.479447 B m e_#
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我用*号，标出了需要注意的地方，请高手指教！
