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。 LXf *
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： K-4 o_:F
Warning: At least 3 focal positions are recommended for finding best focus yyc4'j+
Warning: This system is not isoplanatic at field(s) 1, 2, 3, 4. K?e Y<L
Any MTF results are of questionable value for assessing |^C35 6M>
the image quality, except in those cases where the user is A&L2&ofV&q
interested only in the image of a point-like object. The +XpQ9C d
image quality for the unacceptable fields varies significan- A1F!I4p5
tly over a lateral region of 12 Airy disk diameters. - sL4tMP
Warning: The MTF results at one or more fields are inaccurate. CMC9%uq
The mapping between entrance pupil coordinates and exit pupil coordinates SshjUNx
is nonlinear. The nature of the nonlinearity is such that Code V is not ~ As_O6JI
able to compute an accurate MTF result. Usually, this condition is [1g
caused by severe pupil distortion or some discontinuity in the pupil sjG@4Or
coordinate mapping. In all cases where the pupil coordinate mapping
grTwo
has sufficient nonlinearity to cause this warning, the imagery is extremely ~$]Puv1V>
nonstationary (non-isoplanatic) and small changes in object space j71RlS 73
coordinates will cause large changes in the image of a point source. :[?65q{
Error: The problem described here occurs at the following field(s): A75z/O{
Field: 1 wPl9%
Field: 2 As>P(
Field: 3 Lv7$@|"H9
Field: 4 h]DzX8r}
ERROR - For field 4, wavelength 1, rays at the edge of the pupil gzEcdDD
may be ignored. Check apertures and vignetting for consistency. BoP,MpF
这个究竟是什么问题呢？好像是和视场有关。求高人指点。
