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。 /Kbl%u
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： ,,TnIouy
Warning: At least 3 focal positions are recommended for finding best focus :KO2| v\
Warning: This system is not isoplanatic at field(s) 1, 2, 3, 4. *ui</+
Any MTF results are of questionable value for assessing d5d@k
the image quality, except in those cases where the user is 9 $X-
interested only in the image of a point-like object. The 5-M-X#(
image quality for the unacceptable fields varies significan- =c7;r]Ol
tly over a lateral region of 12 Airy disk diameters. L(\cH b9`
Warning: The MTF results at one or more fields are inaccurate. \NC3'G:Ii
The mapping between entrance pupil coordinates and exit pupil coordinates 7z-[f'EIUI
is nonlinear. The nature of the nonlinearity is such that Code V is not E"0>yl)
able to compute an accurate MTF result. Usually, this condition is QW"! (`K
caused by severe pupil distortion or some discontinuity in the pupil Gh $^ {
coordinate mapping. In all cases where the pupil coordinate mapping M3AXe]<eC1
has sufficient nonlinearity to cause this warning, the imagery is extremely zreU')a
nonstationary (non-isoplanatic) and small changes in object space PW4q~rc=:
coordinates will cause large changes in the image of a point source. KSL`W 2}
Error: The problem described here occurs at the following field(s): I_BJH'!t
Field: 1 W>LR\]Ti@
Field: 2 r
:dT z
Field: 3 E_`=7 i
Field: 4 &wX]_:?
ERROR - For field 4, wavelength 1, rays at the edge of the pupil T;#FEzBz
may be ignored. Check apertures and vignetting for consistency. W8<%[-r
这个究竟是什么问题呢？好像是和视场有关。求高人指点。
