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。 95(VY)_6#A
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: 7tr.&A^c
Warning: At least 3 focal positions are recommended for finding best focus Xi|v!^IT
Warning: This system is not isoplanatic at field(s) 1, 2, 3, 4. W``e6RX-
Any MTF results are of questionable value for assessing i:zA(
the image quality, except in those cases where the user is :Mt/6}
interested only in the image of a point-like object. The |]B]0J#_
image quality for the unacceptable fields varies significan- ({i|
tly over a lateral region of 12 Airy disk diameters. |Z"hq
Warning: The MTF results at one or more fields are inaccurate. '7=*n_l
The mapping between entrance pupil coordinates and exit pupil coordinates #u2PAZ@qd
is nonlinear. The nature of the nonlinearity is such that Code V is not G-:DMjvN
able to compute an accurate MTF result. Usually, this condition is uZ'5&k96T
caused by severe pupil distortion or some discontinuity in the pupil YE-kdzff
coordinate mapping. In all cases where the pupil coordinate mapping VLOyUt~O#
has sufficient nonlinearity to cause this warning, the imagery is extremely DdFVOs|
nonstationary (non-isoplanatic) and small changes in object space +~[19'GH
coordinates will cause large changes in the image of a point source. ,Qh4=+jwqn
Error: The problem described here occurs at the following field(s): eq/s8]uM
Field: 1 i?|SC=
Field: 2 AM }OLHj
Field: 3 ho:,~ A;k
Field: 4 @D7cv"
ERROR - For field 4, wavelength 1, rays at the edge of the pupil 3+#bkG
may be ignored. Check apertures and vignetting for consistency. {wMCo,
这个究竟是什么问题呢?好像是和视场有关。求高人指点。