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。 p 5' \< gQ
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： 8vP)qy8
Warning: At least 3 focal positions are recommended for finding best focus G j:|
Warning: This system is not isoplanatic at field(s) 1, 2, 3, 4.
t|DYz#]
Any MTF results are of questionable value for assessing 0&-sz =L
the image quality, except in those cases where the user is j)5Vv
K\
interested only in the image of a point-like object. The hv)($;
image quality for the unacceptable fields varies significan- +$'/!vN
tly over a lateral region of 12 Airy disk diameters. mnia>;
0H
Warning: The MTF results at one or more fields are inaccurate. g<-cHF
The mapping between entrance pupil coordinates and exit pupil coordinates 3 2Z4&~ I
is nonlinear. The nature of the nonlinearity is such that Code V is not iB`m! g6$
able to compute an accurate MTF result. Usually, this condition is 'mM5l *{
caused by severe pupil distortion or some discontinuity in the pupil q.t5L=l^
r
coordinate mapping. In all cases where the pupil coordinate mapping N!3f1d7R Q
has sufficient nonlinearity to cause this warning, the imagery is extremely .PxM
#;i2
nonstationary (non-isoplanatic) and small changes in object space v]!7=>/2
coordinates will cause large changes in the image of a point source. dd+).*
Error: The problem described here occurs at the following field(s): s'^#[%EgB
Field: 1 |g{AD`
Field: 2 5*r6#[S\
Field: 3 1 ,J.
Field: 4 T_dd7Ym'8
ERROR - For field 4, wavelength 1, rays at the edge of the pupil cG'Wh@
may be ignored. Check apertures and vignetting for consistency. YGO@X(ej,
这个究竟是什么问题呢？好像是和视场有关。求高人指点。
