| 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？ nRBS&&V
一下是我的Prescription Data数据： %}TJr]'F
GENERAL LENS DATA: y\_ +,G0
rEWJ3*Hb
Surfaces : 3 SWzqCF
Stop : 1
c V6H!\
System Aperture : Object Space NA = 0.12 @LOfqQ$FE
Glass Catalogs : Schott ZXs,TaU
Ray Aiming : Paraxial Reference, Cache On EmT_T 3v
X Pupil shift : 0 K/*R}X
Y Pupil shift : 0 -&
(iU#W
Z Pupil shift : 0 %/I:r7UR{
Apodization : Gaussian, factor = 1.00000E+000 EY"of[p
************************************************************* WOj}+?/3 R
Effective Focal Length : 1.639158 (in air at system temperature and pressure) CsZm8oL$
Effective Focal Length : 1.639158 (in image space) &V*MNi,4Z
************************************************************* FUL3@Gb$UV
Back Focal Length : -1.061568 S'HA]
Total Track : 4.318 R*bx&..<
Image Space F/# : 3.417255 |*t 2IVwX
Paraxial Working F/# : 2.950535 zlEI_th:~
Working F/# : 2.961912 a&JY x
Image Space NA : 0.1670788 V7U*09
0*5
Object Space NA : 0.12 _0$>LWO~
Stop Radius : 0.2398355 `0ym3} (O
Paraxial Image Height : 0 Pi"?l[T0
Paraxial Magnification : 0 05H:ZrUV
Entrance Pupil Diameter : 0.4796709 1_{ e*=/y
Entrance Pupil Position : 0 1,=:an
Exit Pupil Diameter : 2.511155 H_f8/H
Exit Pupil Position : 7.420935 p+~Imf-Jk
Field Type : Angle in degrees ^ ^}htg
Maximum Field : 0 1P"7.{
Primary Wave : 1.31 AsE77AUA
Lens Units : Millimeters J\+fkN<.
Angular Magnification : 0 ;O)*!yA(GG
y L
asoh
Fields : 1 ?<4pYEP
Field Type: Angle in degrees 5nib<B%<V
# X-Value Y-Value Weight fSd|6 iFH
1 0.000000 0.000000 1.000000 O$,
F#|y,<}<
Vignetting Factors T P#Ncqh
# VDX VDY VCX VCY VAN +i}H $.
1 0.000000 0.000000 0.000000 0.000000 0.000000 M 0}r)@
`scW.Vem
Wavelengths : 1 cr -5t4<jK
Units: Microns ! xM=7Q
k
# Value Weight =_=%1rI~
1 1.310000 1.000000 >dK0&+A
7 Ku&Q<mi
CARDINAL POINTS: u: J( 0re
!+$QN4{9
Object space positions are measured with respect to surface 1. 8 !:2 :
Image space positions are measured with respect to the image surface. 0#Gm# =F
The index in both the object space and image space is considered. H2|'JA#v
e~gNGr]L/
Object Space Image Space >y8>OJ?A7-
W = 1.310000 (Primary) 4r_*: $g
************************************************************ .s4vJKK0
Focal Length : -1.639015 1.639015 LodP,\T
************************************************************ T\.~!Q
Focal Planes : 0.313078 -1.159568 (t3gNin
Principal Planes : 1.952094 -2.798584 KsIHJr7-
Anti-Principal Planes : -1.325937 0.479447 $W}:,]hoj
Nodal Planes : 1.952094 -2.798584 <v9IK$J
Anti-Nodal Planes : -1.325937 0.479447 Q[3hOFCX
D8!
Y0
我用*号，标出了需要注意的地方，请高手指教！
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