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。 24/ ^_Td
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： 9@z"~H
Warning: At least 3 focal positions are recommended for finding best focus U*Pi%J
Warning: This system is not isoplanatic at field(s) 1, 2, 3, 4. 2a O. t
Any MTF results are of questionable value for assessing J9/}ZD^
the image quality, except in those cases where the user is (: T\<
interested only in the image of a point-like object. The NpY zN|W:
image quality for the unacceptable fields varies significan- . vQCX1V(
tly over a lateral region of 12 Airy disk diameters. 5J<ghv>\P
Warning: The MTF results at one or more fields are inaccurate. b$'}IWNV
The mapping between entrance pupil coordinates and exit pupil coordinates `}f wR
is nonlinear. The nature of the nonlinearity is such that Code V is not +0WI;M4i
able to compute an accurate MTF result. Usually, this condition is q/yL={H?
caused by severe pupil distortion or some discontinuity in the pupil ' #0'_9}
coordinate mapping. In all cases where the pupil coordinate mapping )}jXC 4
has sufficient nonlinearity to cause this warning, the imagery is extremely _8"%nV
nonstationary (non-isoplanatic) and small changes in object space v}\Nx[}
coordinates will cause large changes in the image of a point source. xA2 "i2k9
Error: The problem described here occurs at the following field(s): >~k"C,6
Field: 1 QWV12t$v
Field: 2 ln6Hr^@5
Field: 3 cp>1b8l6?
Field: 4 J.QFrIB{]+
ERROR - For field 4, wavelength 1, rays at the edge of the pupil 2hI|] p
may be ignored. Check apertures and vignetting for consistency. k),.
这个究竟是什么问题呢？好像是和视场有关。求高人指点。
