| 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？ [5!{>L`
一下是我的Prescription Data数据： Z6-
GENERAL LENS DATA: J0f!+]~G3
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Surfaces : 3 f6\4 ,()
Stop : 1 7$Wbf4
System Aperture : Object Space NA = 0.12 2B)1
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Glass Catalogs : Schott a*&&6Fo
Ray Aiming : Paraxial Reference, Cache On _V8;dv8
X Pupil shift : 0 ~$//4kES
Y Pupil shift : 0 )Pc>+} D
Z Pupil shift : 0 x& JD~,Y
Apodization : Gaussian, factor = 1.00000E+000 ;gAL_/ _
************************************************************* )p#L "r^)
Effective Focal Length : 1.639158 (in air at system temperature and pressure) -s)h
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Effective Focal Length : 1.639158 (in image space) owyQFk
************************************************************* j4 `+RS+q
Back Focal Length : -1.061568 zmu+un"\j
Total Track : 4.318 8N |K
Image Space F/# : 3.417255
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Paraxial Working F/# : 2.950535 egr"og{
Working F/# : 2.961912 b5.]}>]t
Image Space NA : 0.1670788 m;1/+qs0
Object Space NA : 0.12 )_>'D4l ?
Stop Radius : 0.2398355 q<^MC/]
Paraxial Image Height : 0 rf`xY4I\
Paraxial Magnification : 0 dK8dC1@,X;
Entrance Pupil Diameter : 0.4796709 0DnOO0Nc
Entrance Pupil Position : 0 =HV${+K=~
Exit Pupil Diameter : 2.511155 u"wWekB
Exit Pupil Position : 7.420935 WCk. K
Field Type : Angle in degrees .r-Zz3
Maximum Field : 0 U KTfLh
Primary Wave : 1.31 MXDCOe~07
Lens Units : Millimeters P1^|r}
Angular Magnification : 0 YRv96|c,
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Fields : 1 0S&J=2D!
Field Type: Angle in degrees 2AMb-&po&f
# X-Value Y-Value Weight Jf#-OlEQ
1 0.000000 0.000000 1.000000
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B va2f:)K|
Vignetting Factors q
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# VDX VDY VCX VCY VAN .A_R6~::
1 0.000000 0.000000 0.000000 0.000000 0.000000 *XYp~b
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Wavelengths : 1 \Mdi eO*
Units: Microns 9%"\s2T
# Value Weight '{.8tT ?tJ
1 1.310000 1.000000 C(z 'oi:f
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CARDINAL POINTS: =1VZcLNt
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Object space positions are measured with respect to surface 1. hM>.xr
Image space positions are measured with respect to the image surface. lOe|]pQ.,
The index in both the object space and image space is considered. lF 40n4}
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Object Space Image Space o Q*LP{M
W = 1.310000 (Primary) ?|
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************************************************************ .yD
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Focal Length : -1.639015 1.639015 [7LdTY"Tl
************************************************************ $A/?evJi8R
Focal Planes : 0.313078 -1.159568 P3Vh|<'7
Principal Planes : 1.952094 -2.798584 4vvQ7e7
Anti-Principal Planes : -1.325937 0.479447 >,_0Mem2Rr
Nodal Planes : 1.952094 -2.798584 >LH}A6dUC
Anti-Nodal Planes : -1.325937 0.479447 k\dPF@~Hvl
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:5
我用*号，标出了需要注意的地方，请高手指教！
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