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{@O %fv=
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： -9Q(3$}
Warning: At least 3 focal positions are recommended for finding best focus B=_w9iVN
Warning: This system is not isoplanatic at field(s) 1, 2, 3, 4. ;Rrh$Ag
Any MTF results are of questionable value for assessing jUe@xi s<T
the image quality, except in those cases where the user is eV;r /4
interested only in the image of a point-like object. The =C"[o\]VV
image quality for the unacceptable fields varies significan- b IDUa
tly over a lateral region of 12 Airy disk diameters. Ss3p6%V/
Warning: The MTF results at one or more fields are inaccurate. &,X}M
The mapping between entrance pupil coordinates and exit pupil coordinates l=@ B 'a
is nonlinear. The nature of the nonlinearity is such that Code V is not xQoZ[
able to compute an accurate MTF result. Usually, this condition is YagfCi ?
caused by severe pupil distortion or some discontinuity in the pupil a)_ 3r]sv^
coordinate mapping. In all cases where the pupil coordinate mapping 'o AmA=
has sufficient nonlinearity to cause this warning, the imagery is extremely ]33!obM
nonstationary (non-isoplanatic) and small changes in object space t^s&1#iC
coordinates will cause large changes in the image of a point source. b?H"/Mu.
Error: The problem described here occurs at the following field(s): JGs: R D '
Field: 1 87 Z[0>
Field: 2 '-iE bE
Field: 3 vygzL U^
Field: 4 ?=u?u
k<-
ERROR - For field 4, wavelength 1, rays at the edge of the pupil b!<_ JOL2.
may be ignored. Check apertures and vignetting for consistency. Y.^L^ "%dF
这个究竟是什么问题呢？好像是和视场有关。求高人指点。
