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。 9s*Lzi[}
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： ]|[xY8 5}
Warning: At least 3 focal positions are recommended for finding best focus {'!D2y.7g
Warning: This system is not isoplanatic at field(s) 1, 2, 3, 4. w-\fCp )
Any MTF results are of questionable value for assessing 3ZZJY f=
the image quality, except in those cases where the user is PA5g]Tz
interested only in the image of a point-like object. The ]/$tt@h
image quality for the unacceptable fields varies significan- !)\`U/.W
tly over a lateral region of 12 Airy disk diameters. G&uj}rj
Warning: The MTF results at one or more fields are inaccurate. *=2jteG=3.
The mapping between entrance pupil coordinates and exit pupil coordinates X&p-Ge1>z
is nonlinear. The nature of the nonlinearity is such that Code V is not 3c9[FZ@ya
able to compute an accurate MTF result. Usually, this condition is eQ9x l
caused by severe pupil distortion or some discontinuity in the pupil 6=')*_~/
coordinate mapping. In all cases where the pupil coordinate mapping M1ayAXO
has sufficient nonlinearity to cause this warning, the imagery is extremely 6iC}%e U
nonstationary (non-isoplanatic) and small changes in object space r{<u\>6X>P
coordinates will cause large changes in the image of a point source. g|+G(~=e|
Error: The problem described here occurs at the following field(s): M?\)&2f[Z
Field: 1 L>L4%?
Field: 2 r+lY9 l
Field: 3 ol YSr .Q`
Field: 4 A?7%q^;E
ERROR - For field 4, wavelength 1, rays at the edge of the pupil N A3yd^sr
may be ignored. Check apertures and vignetting for consistency. ?%LD1 <ya
这个究竟是什么问题呢？好像是和视场有关。求高人指点。
