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。 {:j!@w 3
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： DccsVR`7
Warning: At least 3 focal positions are recommended for finding best focus =C}<0<"iF
Warning: This system is not isoplanatic at field(s) 1, 2, 3, 4. '%7]xp
Any MTF results are of questionable value for assessing soCHwiE
the image quality, except in those cases where the user is LR.+C xQ
interested only in the image of a point-like object. The 2 fA9L _:0
image quality for the unacceptable fields varies significan- ZOsn,nF
tly over a lateral region of 12 Airy disk diameters. sm S0Rk
Warning: The MTF results at one or more fields are inaccurate. 1F8EL)9
The mapping between entrance pupil coordinates and exit pupil coordinates s&hP^tKT
is nonlinear. The nature of the nonlinearity is such that Code V is not O/~^}8TLL
able to compute an accurate MTF result. Usually, this condition is =&xoyF
caused by severe pupil distortion or some discontinuity in the pupil `a9>4
coordinate mapping. In all cases where the pupil coordinate mapping -L 3RzX
has sufficient nonlinearity to cause this warning, the imagery is extremely CplRnKra
nonstationary (non-isoplanatic) and small changes in object space WHT%m|yn
coordinates will cause large changes in the image of a point source. 2$UR " P
Error: The problem described here occurs at the following field(s): _ h-X-s Y
Field: 1 bS"M*
Field: 2 p- Btbhv
Field: 3 xz'd5 re%
Field: 4 BS.6d}G4
ERROR - For field 4, wavelength 1, rays at the edge of the pupil {bEEQCweNJ
may be ignored. Check apertures and vignetting for consistency. gWPa8q<b
这个究竟是什么问题呢？好像是和视场有关。求高人指点。
