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。 O<;3M'y\
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： 13=.H5
Warning: At least 3 focal positions are recommended for finding best focus @jlw_ob2g
Warning: This system is not isoplanatic at field(s) 1, 2, 3, 4. uL/ m u<
Any MTF results are of questionable value for assessing gOOPe5+ J
the image quality, except in those cases where the user is 5lT*hF
interested only in the image of a point-like object. The u4|$bbig
image quality for the unacceptable fields varies significan- 19KQlMO.G
tly over a lateral region of 12 Airy disk diameters. AZ}Xj>=
Warning: The MTF results at one or more fields are inaccurate. % -e 82J1
The mapping between entrance pupil coordinates and exit pupil coordinates RlDn0s
is nonlinear. The nature of the nonlinearity is such that Code V is not .%C|+#&d
able to compute an accurate MTF result. Usually, this condition is aCLq k'
caused by severe pupil distortion or some discontinuity in the pupil ; l-!)0 U
coordinate mapping. In all cases where the pupil coordinate mapping G<^{&E+=
has sufficient nonlinearity to cause this warning, the imagery is extremely 78H' a x9m
nonstationary (non-isoplanatic) and small changes in object space _OC <[A
coordinates will cause large changes in the image of a point source. nL.<[]r
Error: The problem described here occurs at the following field(s): +|>kCtZH%
Field: 1 Q( {
r@*g
Field: 2 _Z,\Vw:\F
Field: 3 w~?~g< q
Field: 4 Y]u+\y~
ERROR - For field 4, wavelength 1, rays at the edge of the pupil S + ^E.
may be ignored. Check apertures and vignetting for consistency. Zdo'{ $
这个究竟是什么问题呢？好像是和视场有关。求高人指点。
