| ljwcdtj |
2012-05-17 12:02 |
求CODEV中MTF图线不能显示的原因
小弟用CODEV设计了一个开普勒望远镜。目镜用的是对称式，物镜用了一个双胶合，视觉放大率为12。 q~trn'X>
在目镜和物镜分别优化之后，将二者组合在一起时发现Quick 2D能正常显示，但是MTF图线无法显示，有报错，如下： }(E6:h;}~
Warning: At least 3 focal positions are recommended for finding best focus { r&M
Warning: This system is not isoplanatic at field(s) 1, 2, 3, 4. e%bER ds
Any MTF results are of questionable value for assessing [tMf KO
the image quality, except in those cases where the user is ErESk"2t
interested only in the image of a point-like object. The @+1E|4L1vf
image quality for the unacceptable fields varies significan- 9 b]U&A$
tly over a lateral region of 12 Airy disk diameters. kTi QO2 H
Warning: The MTF results at one or more fields are inaccurate. xOT'4v&.
The mapping between entrance pupil coordinates and exit pupil coordinates T|.Q81.NE
is nonlinear. The nature of the nonlinearity is such that Code V is not 10#!{].#x
able to compute an accurate MTF result. Usually, this condition is MVt#n\_BZV
caused by severe pupil distortion or some discontinuity in the pupil A</[Q>8
coordinate mapping. In all cases where the pupil coordinate mapping &K>]!yn
has sufficient nonlinearity to cause this warning, the imagery is extremely #-'}r}1ZT
nonstationary (non-isoplanatic) and small changes in object space MP}H
5
coordinates will cause large changes in the image of a point source. sxThz7#i)
Error: The problem described here occurs at the following field(s): -&)^|Atm
Field: 1 m9G,% ]4|
Field: 2 sTG+ c E
Field: 3 "fpj"lf-
Field: 4 ,xD{A}}V
ERROR - For field 4, wavelength 1, rays at the edge of the pupil HAO/r`7*
may be ignored. Check apertures and vignetting for consistency. p~8~EQFj
这个究竟是什么问题呢？好像是和视场有关。求高人指点。
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