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。 z/W E,R
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： Ng>5?F^v
Warning: At least 3 focal positions are recommended for finding best focus 3kIN~/<R+7
Warning: This system is not isoplanatic at field(s) 1, 2, 3, 4. (Hz ^)5(~
Any MTF results are of questionable value for assessing \y)rt )
the image quality, except in those cases where the user is T/G z94c
interested only in the image of a point-like object. The '}JhzKNj
image quality for the unacceptable fields varies significan- '()xHEGl3
tly over a lateral region of 12 Airy disk diameters. k) = X}=w
Warning: The MTF results at one or more fields are inaccurate. V>)OpvoT#
The mapping between entrance pupil coordinates and exit pupil coordinates o"Euwh!!
is nonlinear. The nature of the nonlinearity is such that Code V is not #A Sz;$P
able to compute an accurate MTF result. Usually, this condition is R{3N& C
caused by severe pupil distortion or some discontinuity in the pupil )}]g]
g
coordinate mapping. In all cases where the pupil coordinate mapping 8'.Hyy@;
has sufficient nonlinearity to cause this warning, the imagery is extremely KRLQ # ,9
nonstationary (non-isoplanatic) and small changes in object space " 4K(jXq|
coordinates will cause large changes in the image of a point source. $L>@Ed<
Error: The problem described here occurs at the following field(s): /vd e2.|
Field: 1 |`f$tj
Field: 2 6C^
D#.S
Field: 3 ,p@y]
cr
Field: 4 \oXpi$
ERROR - For field 4, wavelength 1, rays at the edge of the pupil @ ZwvBH
may be ignored. Check apertures and vignetting for consistency. \H~T>j{N
这个究竟是什么问题呢？好像是和视场有关。求高人指点。
