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。 f!K{f[aDa
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： JH+uBZh6
Warning: At least 3 focal positions are recommended for finding best focus V
M{Sng
Warning: This system is not isoplanatic at field(s) 1, 2, 3, 4. nJ2910"<
Any MTF results are of questionable value for assessing Ov~vK\
the image quality, except in those cases where the user is W!R7D%nX
interested only in the image of a point-like object. The %% + @s
image quality for the unacceptable fields varies significan- l[K o>
tly over a lateral region of 12 Airy disk diameters. <El!,UBq<
Warning: The MTF results at one or more fields are inaccurate. u-u:7VtH0=
The mapping between entrance pupil coordinates and exit pupil coordinates 7TB&Q*Zf
is nonlinear. The nature of the nonlinearity is such that Code V is not f7?u` "C
able to compute an accurate MTF result. Usually, this condition is SNrX(V::z
caused by severe pupil distortion or some discontinuity in the pupil 2=
) V"lR\
coordinate mapping. In all cases where the pupil coordinate mapping qS/
'Kyp_
has sufficient nonlinearity to cause this warning, the imagery is extremely ~sVbg$]\ G
nonstationary (non-isoplanatic) and small changes in object space t; b1<TLn0
coordinates will cause large changes in the image of a point source. b>@fHmpwD
Error: The problem described here occurs at the following field(s): #}+_Hy
Field: 1 _ 5/3RN
Field: 2 ]vjMfT%]W
Field: 3 l{8t;!2t
Field: 4 8E|FFHNK<2
ERROR - For field 4, wavelength 1, rays at the edge of the pupil S9E<)L
may be ignored. Check apertures and vignetting for consistency. p?'
F$Wz
这个究竟是什么问题呢？好像是和视场有关。求高人指点。
