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。 SM%/pu;
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： 5Zd oem
Warning: At least 3 focal positions are recommended for finding best focus G.^) 5!By
Warning: This system is not isoplanatic at field(s) 1, 2, 3, 4. e!o\AB%d
Any MTF results are of questionable value for assessing >MSK.SNh
the image quality, except in those cases where the user is j vAjnh#
interested only in the image of a point-like object. The e&*b{>1*
image quality for the unacceptable fields varies significan- Jm#p!G+
tly over a lateral region of 12 Airy disk diameters. Sc#3<nVg
Warning: The MTF results at one or more fields are inaccurate. J3~%9MCJ
The mapping between entrance pupil coordinates and exit pupil coordinates {Z 7ixc523
is nonlinear. The nature of the nonlinearity is such that Code V is not u|T]Ne
able to compute an accurate MTF result. Usually, this condition is
D~BL T xq
caused by severe pupil distortion or some discontinuity in the pupil S,ea[$_
coordinate mapping. In all cases where the pupil coordinate mapping |TP,
has sufficient nonlinearity to cause this warning, the imagery is extremely }mzd23^W>P
nonstationary (non-isoplanatic) and small changes in object space KO~KaN
coordinates will cause large changes in the image of a point source. /H"fycZ
Error: The problem described here occurs at the following field(s): Z^z{,
u;!
Field: 1 l qwy 5#
Field: 2 dP +wcl4
Field: 3 PH%'^YA l7
Field: 4 1G"ohosmF
ERROR - For field 4, wavelength 1, rays at the edge of the pupil OzD\* ,{7
may be ignored. Check apertures and vignetting for consistency. *9uNM@7 &0
这个究竟是什么问题呢？好像是和视场有关。求高人指点。
