| 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？ {&b-}f"m
一下是我的Prescription Data数据： 9 &[\*{
GENERAL LENS DATA: m&{rBz0
'4Y*-!9
Surfaces : 3 'jwTGT5x
Stop : 1 xKisL=l6Y
System Aperture : Object Space NA = 0.12
pe|\'<>i
Glass Catalogs : Schott CTh1;U20
Ray Aiming : Paraxial Reference, Cache On ^ W{eO@
X Pupil shift : 0
2fbvU
Y Pupil shift : 0 r6/<&1[
Z Pupil shift : 0 Kjvs@~6t
Apodization : Gaussian, factor = 1.00000E+000 0honHP
************************************************************* T)*l' g'
Effective Focal Length : 1.639158 (in air at system temperature and pressure) 34^Q5B~^J
Effective Focal Length : 1.639158 (in image space) !DCVoc]pV
************************************************************* Zj5NWzj
X
Back Focal Length : -1.061568 $Jt8d|UP
Total Track : 4.318 ]lC 4+{V
Image Space F/# : 3.417255 Oym]&SrbS
Paraxial Working F/# : 2.950535 @) 8NI[=6O
Working F/# : 2.961912 NdaM9a#TZ
Image Space NA : 0.1670788 W'8J<VBD
Object Space NA : 0.12 qRWJ-T :!F
Stop Radius : 0.2398355 y0lL Fe~
Paraxial Image Height : 0 O{O 9}]6
Paraxial Magnification : 0 ag GgJ@
Entrance Pupil Diameter : 0.4796709 ggzAU6J
Entrance Pupil Position : 0 !G@V<'F
Exit Pupil Diameter : 2.511155 :Fq2x_IUE
Exit Pupil Position : 7.420935 UX+?0 K
Field Type : Angle in degrees hlt9x.e.A
Maximum Field : 0 /<G yg7o0
Primary Wave : 1.31 :a# |
Lens Units : Millimeters i] V
F'tG
Angular Magnification : 0
pyGFDB5_P
:ga 9Db9P
Fields : 1 N2 M?5fF
Field Type: Angle in degrees pvK \fSr
# X-Value Y-Value Weight 7 B4w.P,B
1 0.000000 0.000000 1.000000 Sf#\6X<B
' h0\4eu
Vignetting Factors L2do 2_
# VDX VDY VCX VCY VAN OsDp88Bc
1 0.000000 0.000000 0.000000 0.000000 0.000000 2*b# + b
[j]}$f Fe
Wavelengths : 1 \f ~u85
Units: Microns R
A-^! 4tX
# Value Weight :C}KI)
1 1.310000 1.000000 U<#$w{d:
-sruxF
CARDINAL POINTS:
} j]<&I}
y81#UD9[
Object space positions are measured with respect to surface 1. Ej9/_0lt
Image space positions are measured with respect to the image surface. ([z<TS #Md
The index in both the object space and image space is considered. lUy*549,
j X^&4f
Object Space Image Space bUEt0wRR
W = 1.310000 (Primary) w%!k?t,*]
************************************************************ (dw3'W
Focal Length : -1.639015 1.639015 mRix0XBI~
************************************************************ = 2GP^vh
Focal Planes : 0.313078 -1.159568 htNL2N
Principal Planes : 1.952094 -2.798584 Vf#oKPP1
Anti-Principal Planes : -1.325937 0.479447 ^H y)< P
Nodal Planes : 1.952094 -2.798584 Al;%u0]5
Anti-Nodal Planes : -1.325937 0.479447 ~`W6O>
|R:v<
我用*号，标出了需要注意的地方，请高手指教！
|
|