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。 hCo|H B
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： x|29L7 i
Warning: At least 3 focal positions are recommended for finding best focus e~(5%CO>#j
Warning: This system is not isoplanatic at field(s) 1, 2, 3, 4. IvNT6]6 P
Any MTF results are of questionable value for assessing |&4/n6;P$0
the image quality, except in those cases where the user is .eC1qWZJpd
interested only in the image of a point-like object. The fd9k?,zM
image quality for the unacceptable fields varies significan- o,wUc"CE
tly over a lateral region of 12 Airy disk diameters. \^1E4C\":
Warning: The MTF results at one or more fields are inaccurate. Zgb!E]V[
The mapping between entrance pupil coordinates and exit pupil coordinates = WJ NWt>
is nonlinear. The nature of the nonlinearity is such that Code V is not :2)/FPL6
able to compute an accurate MTF result. Usually, this condition is bQ5\ ]5M
caused by severe pupil distortion or some discontinuity in the pupil iam1V)V
coordinate mapping. In all cases where the pupil coordinate mapping |+"(L#wk
has sufficient nonlinearity to cause this warning, the imagery is extremely a09<!0Rp
nonstationary (non-isoplanatic) and small changes in object space ~bpgSP"
coordinates will cause large changes in the image of a point source.
W!(LF7_!
Error: The problem described here occurs at the following field(s): XB5DPx
Field: 1 9o!Bzy+_
Field: 2 uvS)8-o&F
Field: 3 C9 j|OSgk
Field: 4 Dum9lj
ERROR - For field 4, wavelength 1, rays at the edge of the pupil S5EK~#-L [
may be ignored. Check apertures and vignetting for consistency. Uo ix
这个究竟是什么问题呢？好像是和视场有关。求高人指点。
