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。 Y@ 2v/O,\
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： D0VbD" y
Warning: At least 3 focal positions are recommended for finding best focus x03@} M1
Warning: This system is not isoplanatic at field(s) 1, 2, 3, 4. #H-EOXy
Any MTF results are of questionable value for assessing Ac8t>;=&
the image quality, except in those cases where the user is %shCqS
interested only in the image of a point-like object. The zY2o;-d|4
image quality for the unacceptable fields varies significan- $q 9dkt
tly over a lateral region of 12 Airy disk diameters. 9 `T 2
Warning: The MTF results at one or more fields are inaccurate. |DkK7gw
The mapping between entrance pupil coordinates and exit pupil coordinates ~fY\;
is nonlinear. The nature of the nonlinearity is such that Code V is not ,HECH A_"
able to compute an accurate MTF result. Usually, this condition is K_o[m!:jU
caused by severe pupil distortion or some discontinuity in the pupil 7QM1E(cMg
coordinate mapping. In all cases where the pupil coordinate mapping 1g>>{ y
has sufficient nonlinearity to cause this warning, the imagery is extremely S:{`eDk\A_
nonstationary (non-isoplanatic) and small changes in object space DW >|'w %
coordinates will cause large changes in the image of a point source.
YES-,;ZQ'
Error: The problem described here occurs at the following field(s): 6YF<GF{
Field: 1 J?_-Dg(=
Field: 2 G6q*U,
Field: 3 e_3($pj
Field: 4 -h%1rw
ERROR - For field 4, wavelength 1, rays at the edge of the pupil >^J
may be ignored. Check apertures and vignetting for consistency. $*c!9Etl4
这个究竟是什么问题呢？好像是和视场有关。求高人指点。
