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。 X,&xhSzg?
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： i&1U4q
Warning: At least 3 focal positions are recommended for finding best focus tPzM7
n|
Warning: This system is not isoplanatic at field(s) 1, 2, 3, 4. w. vY(s
Any MTF results are of questionable value for assessing V-:`+&S{^
the image quality, except in those cases where the user is #B\B(y
interested only in the image of a point-like object. The 9yDFHz w
image quality for the unacceptable fields varies significan- SCI1bMf
tly over a lateral region of 12 Airy disk diameters. 7Qt 2gf
Warning: The MTF results at one or more fields are inaccurate. @F~0p5I
The mapping between entrance pupil coordinates and exit pupil coordinates GA7u5D" 0
is nonlinear. The nature of the nonlinearity is such that Code V is not +RdI;QmM
able to compute an accurate MTF result. Usually, this condition is "u,sRbL
caused by severe pupil distortion or some discontinuity in the pupil 8 `o{b"l+
coordinate mapping. In all cases where the pupil coordinate mapping jJ*=Ghu-
has sufficient nonlinearity to cause this warning, the imagery is extremely G u6[{u
nonstationary (non-isoplanatic) and small changes in object space Io09 W ^
coordinates will cause large changes in the image of a point source. *|@+rbjVC
Error: The problem described here occurs at the following field(s): z?I+u* rF6
Field: 1
0&f\7z
Field: 2 v)% [
Field: 3 N JXa_&_
Field: 4 |z ] aa
ERROR - For field 4, wavelength 1, rays at the edge of the pupil kz$(V(k<
may be ignored. Check apertures and vignetting for consistency. '+tKvTU;
这个究竟是什么问题呢？好像是和视场有关。求高人指点。
