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。 + +# 5
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： A nvRxb.e
Warning: At least 3 focal positions are recommended for finding best focus \_6/vZ%-B
Warning: This system is not isoplanatic at field(s) 1, 2, 3, 4. dw7$Vh0y
Any MTF results are of questionable value for assessing *r% c
the image quality, except in those cases where the user is <1COZ)
interested only in the image of a point-like object. The tlt*fH$ .
image quality for the unacceptable fields varies significan- bnLPlf
tly over a lateral region of 12 Airy disk diameters. u=_mv N
Warning: The MTF results at one or more fields are inaccurate. : $9tF >
The mapping between entrance pupil coordinates and exit pupil coordinates P_#bow
is nonlinear. The nature of the nonlinearity is such that Code V is not t>B;w14
able to compute an accurate MTF result. Usually, this condition is U~l$\ c
caused by severe pupil distortion or some discontinuity in the pupil % -e 82J1
coordinate mapping. In all cases where the pupil coordinate mapping RlDn0s
has sufficient nonlinearity to cause this warning, the imagery is extremely .%C|+#&d
nonstationary (non-isoplanatic) and small changes in object space xpx\=iAe
coordinates will cause large changes in the image of a point source. }I6vqG
Error: The problem described here occurs at the following field(s): f.` *Qg L
Field: 1 qXjxNrK
Field: 2 QS]1daMIK<
Field: 3 = +?7''{>
Field: 4 d6sye^P
ERROR - For field 4, wavelength 1, rays at the edge of the pupil ;?g6QIN9
may be ignored. Check apertures and vignetting for consistency. ;
p {[1
这个究竟是什么问题呢？好像是和视场有关。求高人指点。
