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。 UB&)U\hn
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： '.&z y#
Warning: At least 3 focal positions are recommended for finding best focus DGllJ_/Z
Warning: This system is not isoplanatic at field(s) 1, 2, 3, 4. n^m6m%J)
Any MTF results are of questionable value for assessing a}]zwV&
the image quality, except in those cases where the user is v\ gCgx=%j
interested only in the image of a point-like object. The Mk"V%)1k
image quality for the unacceptable fields varies significan- // \UthOT
tly over a lateral region of 12 Airy disk diameters. ;q6FdS
Warning: The MTF results at one or more fields are inaccurate. %}%vey
The mapping between entrance pupil coordinates and exit pupil coordinates ;}=[( eqA
is nonlinear. The nature of the nonlinearity is such that Code V is not 8LouCv(>
able to compute an accurate MTF result. Usually, this condition is T-L; iH~0
caused by severe pupil distortion or some discontinuity in the pupil ? [K \X
coordinate mapping. In all cases where the pupil coordinate mapping sG~5O\,E
has sufficient nonlinearity to cause this warning, the imagery is extremely ]\Tcy [5
nonstationary (non-isoplanatic) and small changes in object space 1]l m0bfs
coordinates will cause large changes in the image of a point source. Tfba3+V
Error: The problem described here occurs at the following field(s): &v# *
Field: 1 &bO0Rn1F
Field: 2 (!0=~x|Z[
Field: 3 ua -cX3 E
Field: 4 Vgh_F8G!V
ERROR - For field 4, wavelength 1, rays at the edge of the pupil s)~6 0c
may be ignored. Check apertures and vignetting for consistency. BEv>?T
0
这个究竟是什么问题呢？好像是和视场有关。求高人指点。
