| qlmi |
2006-08-10 13:34 |
关于Effective focal length的问题
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？ }R+#>P
一下是我的Prescription Data数据： ? cWw t~N9
GENERAL LENS DATA: 3_ wR2AU~
iuWUr?`\
Surfaces : 3 vU bgSI
Stop : 1 olQP>sa
System Aperture : Object Space NA = 0.12 C1 f$^N
Glass Catalogs : Schott rOLZiE T
Ray Aiming : Paraxial Reference, Cache On u gN%8N
X Pupil shift : 0 . h)VR
5?j
Y Pupil shift : 0
P'B|s /)
Z Pupil shift : 0 L=;T$4+p
Apodization : Gaussian, factor = 1.00000E+000 ih)\P0wed
************************************************************* =,i t`8;
Effective Focal Length : 1.639158 (in air at system temperature and pressure) c86?-u')
Effective Focal Length : 1.639158 (in image space) }0<2n~3P
************************************************************* g
\S6>LG!
Back Focal Length : -1.061568 TX YO{
Total Track : 4.318 m N{H^
Image Space F/# : 3.417255 j{FRD8]V
Paraxial Working F/# : 2.950535 3>3t( M |
Working F/# : 2.961912 38-kl,Vw
Image Space NA : 0.1670788 KJ/Gv#Kj
Object Space NA : 0.12 }#.O Jub
Stop Radius : 0.2398355
M3UC 9t9]
Paraxial Image Height : 0 XC<'m{^(m
Paraxial Magnification : 0 ;C =d(
pY
Entrance Pupil Diameter : 0.4796709 yT<"?S>D
Entrance Pupil Position : 0 7>zUT0SS
Exit Pupil Diameter : 2.511155 m~=VUhPd
Exit Pupil Position : 7.420935 'S}3 lsIE
Field Type : Angle in degrees N4qBCBr(
Maximum Field : 0 _T.`+0UV
Primary Wave : 1.31 1h`F* :nva
Lens Units : Millimeters Edc3YSg%;
Angular Magnification : 0 lrkgsv6
/AX)n:,
Fields : 1 (5`(H.(
Field Type: Angle in degrees a"4X7
D+
# X-Value Y-Value Weight dL'oIBp
1 0.000000 0.000000 1.000000 @ukL! AV?Y
xv>8rW(Np5
Vignetting Factors A+Un(tU2(
# VDX VDY VCX VCY VAN %! Sj bh
1 0.000000 0.000000 0.000000 0.000000 0.000000 9:%')M&Q
KJ&I4CU]^
Wavelengths : 1 (i{ZxWW &
Units: Microns JI-.SR
# Value Weight .0 /"~5
1 1.310000 1.000000 ' "%hX&]5
D)4#AI
CARDINAL POINTS: /w6'tut
zvnd@y{[
Object space positions are measured with respect to surface 1. ^Q0=Ggh
Image space positions are measured with respect to the image surface. W4qT]m
The index in both the object space and image space is considered. OJydt ; a
to_dNJbv
Object Space Image Space lGT[6S\as
W = 1.310000 (Primary) .j)DE}[q>
************************************************************ /3Y"F"`M.
Focal Length : -1.639015 1.639015 7/]R a
************************************************************ " 5Pqvi
Focal Planes : 0.313078 -1.159568 ~.e~YI80
Principal Planes : 1.952094 -2.798584 \qW^AD(it<
Anti-Principal Planes : -1.325937 0.479447 ,Cm1~ExJ
Nodal Planes : 1.952094 -2.798584 p+nB@fN/
Anti-Nodal Planes : -1.325937 0.479447 =mwAbh)[7n
1'&HmBfcb
我用*号，标出了需要注意的地方，请高手指教！
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