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。 H;^6%HV1
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： Z d%*,\ `S
Warning: At least 3 focal positions are recommended for finding best focus W&"FejD
Warning: This system is not isoplanatic at field(s) 1, 2, 3, 4. wxoBq{r;
Any MTF results are of questionable value for assessing 7S Qu
the image quality, except in those cases where the user is {\% x{
interested only in the image of a point-like object. The i,~{{X S<
image quality for the unacceptable fields varies significan- m$4 Gm(Up
tly over a lateral region of 12 Airy disk diameters. FGZOn5U6'
Warning: The MTF results at one or more fields are inaccurate. !:>y.^O
The mapping between entrance pupil coordinates and exit pupil coordinates 2 9E^]IL?
is nonlinear. The nature of the nonlinearity is such that Code V is not }SYvGp{J,
able to compute an accurate MTF result. Usually, this condition is NZl0sX.:
caused by severe pupil distortion or some discontinuity in the pupil rlds-j ''
coordinate mapping. In all cases where the pupil coordinate mapping ^ PD a
has sufficient nonlinearity to cause this warning, the imagery is extremely J sH9IK:
nonstationary (non-isoplanatic) and small changes in object space A_[65'*b
coordinates will cause large changes in the image of a point source. 6Us#4 v,
Error: The problem described here occurs at the following field(s): ^v,^.>P
Field: 1 M]&9Kg3
Field: 2 Q{>{ e3z}
Field: 3 k`N)-` O7
Field: 4 U zc`,iV$
ERROR - For field 4, wavelength 1, rays at the edge of the pupil 8U-}%D<a
may be ignored. Check apertures and vignetting for consistency. {RzlmDStV
这个究竟是什么问题呢？好像是和视场有关。求高人指点。
