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。 1eZ759PoO
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： RnX:T)+o
Warning: At least 3 focal positions are recommended for finding best focus kq
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Warning: This system is not isoplanatic at field(s) 1, 2, 3, 4. i.e1?Zk1
Any MTF results are of questionable value for assessing [Ie;Jd>gG
the image quality, except in those cases where the user is Z7X_U` Q
interested only in the image of a point-like object. The [JY 1| N
image quality for the unacceptable fields varies significan- tX$ v)O|
tly over a lateral region of 12 Airy disk diameters. fgW>U*.ar
Warning: The MTF results at one or more fields are inaccurate. H.HXwN/x
The mapping between entrance pupil coordinates and exit pupil coordinates _U"9#<
is nonlinear. The nature of the nonlinearity is such that Code V is not 2)A% 'Akf
able to compute an accurate MTF result. Usually, this condition is 1$*ZN4
caused by severe pupil distortion or some discontinuity in the pupil /8(\AuDT
coordinate mapping. In all cases where the pupil coordinate mapping ue5C
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has sufficient nonlinearity to cause this warning, the imagery is extremely , p,$(V
nonstationary (non-isoplanatic) and small changes in object space 'T F5CNX
coordinates will cause large changes in the image of a point source. NRM=0-16u$
Error: The problem described here occurs at the following field(s): e7( iMe
Field: 1 'V=i;2mB*
Field: 2 YjTRz.e{[7
Field: 3 |M j2lZS
Field: 4 NT^m.o~4
ERROR - For field 4, wavelength 1, rays at the edge of the pupil 7ktSj}7W]
may be ignored. Check apertures and vignetting for consistency. 6 ,707h
这个究竟是什么问题呢？好像是和视场有关。求高人指点。
