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。 D- C]0Jf3
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： d-Z2-89K
Warning: At least 3 focal positions are recommended for finding best focus Pi?G:IF
Warning: This system is not isoplanatic at field(s) 1, 2, 3, 4. +3zQ"lLD^
Any MTF results are of questionable value for assessing &gS-.{w "
the image quality, except in those cases where the user is S
WTZ6(!oW
interested only in the image of a point-like object. The Nk\ni>Du3
image quality for the unacceptable fields varies significan- ySiZ@i4
tly over a lateral region of 12 Airy disk diameters. Tb2#y ]27
Warning: The MTF results at one or more fields are inaccurate. P#!g P3
The mapping between entrance pupil coordinates and exit pupil coordinates !^MwE]
is nonlinear. The nature of the nonlinearity is such that Code V is not hV,T889'
able to compute an accurate MTF result. Usually, this condition is K7JZUS`C!
caused by severe pupil distortion or some discontinuity in the pupil #P}n+w_@
coordinate mapping. In all cases where the pupil coordinate mapping f!YlYk5
has sufficient nonlinearity to cause this warning, the imagery is extremely <aaT,J8%[
nonstationary (non-isoplanatic) and small changes in object space ,Il) t H
coordinates will cause large changes in the image of a point source. nTGf
Error: The problem described here occurs at the following field(s): 5p~5-_JX
Field: 1 -U$;\1--
Field: 2 t`hes
$E
Field: 3 fNx !'{o"
Field: 4 (r?hD *2r
ERROR - For field 4, wavelength 1, rays at the edge of the pupil V73/q
may be ignored. Check apertures and vignetting for consistency. s1[. L~;J
这个究竟是什么问题呢？好像是和视场有关。求高人指点。
