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。 83\ 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：
F\o ;t:
Warning: At least 3 focal positions are recommended for finding best focus "xL;(Fqu
Warning: This system is not isoplanatic at field(s) 1, 2, 3, 4. '2 w XV;`
Any MTF results are of questionable value for assessing y;zt_ O/
the image quality, except in those cases where the user is dMey/A/VYt
interested only in the image of a point-like object. The VfQMF b',o
image quality for the unacceptable fields varies significan- N>Vacc_[
tly over a lateral region of 12 Airy disk diameters. 8f /T!5
Warning: The MTF results at one or more fields are inaccurate. ){+.8KI
The mapping between entrance pupil coordinates and exit pupil coordinates W`w5jk'0^=
is nonlinear. The nature of the nonlinearity is such that Code V is not i_[^s:*T
able to compute an accurate MTF result. Usually, this condition is HyZVr2
caused by severe pupil distortion or some discontinuity in the pupil {E;2 &d
coordinate mapping. In all cases where the pupil coordinate mapping T@%;0Ro~
has sufficient nonlinearity to cause this warning, the imagery is extremely q"{Up
nonstationary (non-isoplanatic) and small changes in object space ?BWH r(J
coordinates will cause large changes in the image of a point source. sKe9at^E]>
Error: The problem described here occurs at the following field(s): L 2[Ei|9_
Field: 1 FE0qw1{qQ
Field: 2 |h#DL$
Field: 3 Es.toOH$S
Field: 4 6V.awg,
ERROR - For field 4, wavelength 1, rays at the edge of the pupil *37LN
may be ignored. Check apertures and vignetting for consistency. 7 JxE |G
这个究竟是什么问题呢？好像是和视场有关。求高人指点。
