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。 c+FTt(\8.
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： H'WYnhU&
Warning: At least 3 focal positions are recommended for finding best focus QM(xMq
Warning: This system is not isoplanatic at field(s) 1, 2, 3, 4. T_*i nPf
Any MTF results are of questionable value for assessing n-9xfn0U~#
the image quality, except in those cases where the user is #L.,a TA<
interested only in the image of a point-like object. The chICc</l&
image quality for the unacceptable fields varies significan- }TTghE!
tly over a lateral region of 12 Airy disk diameters. x; ?8Zr
Warning: The MTF results at one or more fields are inaccurate. FJ0I&FyWs
The mapping between entrance pupil coordinates and exit pupil coordinates Q/|.=:~FO
is nonlinear. The nature of the nonlinearity is such that Code V is not (2b${ Q@V
able to compute an accurate MTF result. Usually, this condition is &2W"4SE]6
caused by severe pupil distortion or some discontinuity in the pupil YrL(4 Nt8
coordinate mapping. In all cases where the pupil coordinate mapping fw&*;a z
has sufficient nonlinearity to cause this warning, the imagery is extremely QT c{7&
nonstationary (non-isoplanatic) and small changes in object space ,b5'<3\
coordinates will cause large changes in the image of a point source. ;.4y @ ?B
Error: The problem described here occurs at the following field(s): iy~h|YK;
Field: 1 h3`}{
w
Field: 2 5 t%8y!s
Field: 3 |^1g*f y?
Field: 4 1m5l((d
ERROR - For field 4, wavelength 1, rays at the edge of the pupil d[6 'w ?
may be ignored. Check apertures and vignetting for consistency. 8&EJ. CQ
这个究竟是什么问题呢？好像是和视场有关。求高人指点。
