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。 8m,PsUp7
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： _=W ^#z
Warning: At least 3 focal positions are recommended for finding best focus bB^% O^:
Warning: This system is not isoplanatic at field(s) 1, 2, 3, 4. n+Of biz@
Any MTF results are of questionable value for assessing `k y>M-
the image quality, except in those cases where the user is lF-;h{
interested only in the image of a point-like object. The 0tbximmDb
image quality for the unacceptable fields varies significan- )zw}+z3st
tly over a lateral region of 12 Airy disk diameters. N)'oX3?x
Warning: The MTF results at one or more fields are inaccurate. ?"MJ'u
The mapping between entrance pupil coordinates and exit pupil coordinates 9_Tk8L#
is nonlinear. The nature of the nonlinearity is such that Code V is not _4qP0LCa
able to compute an accurate MTF result. Usually, this condition is b;$ -s
\%
caused by severe pupil distortion or some discontinuity in the pupil *o]Q<S>lH
coordinate mapping. In all cases where the pupil coordinate mapping RqTW$94R D
has sufficient nonlinearity to cause this warning, the imagery is extremely GE4d=;5
nonstationary (non-isoplanatic) and small changes in object space d{_tOj$
coordinates will cause large changes in the image of a point source. \m @8$MK
Error: The problem described here occurs at the following field(s): cgKK(-$ny
Field: 1 fdr.'aMf%
Field: 2 bA]/p%rZ8
Field: 3 B ;Zsp
Field: 4 S0.
ERROR - For field 4, wavelength 1, rays at the edge of the pupil _%WJ7~>
may be ignored. Check apertures and vignetting for consistency. |RT#ZMJek
这个究竟是什么问题呢？好像是和视场有关。求高人指点。
