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。 8cbgP$X
在目镜和物镜分别优化之后，将二者组合在一起时发现Quick 2D能正常显示，但是MTF图线无法显示，有报错，如下： KRh?{
Warning: At least 3 focal positions are recommended for finding best focus gP=@u.
Warning: This system is not isoplanatic at field(s) 1, 2, 3, 4. -l$-\(,M`#
Any MTF results are of questionable value for assessing #+;0=6+SM
the image quality, except in those cases where the user is #.<(/D +
interested only in the image of a point-like object. The %loe8yt
image quality for the unacceptable fields varies significan- 1y.!x~Pi,
tly over a lateral region of 12 Airy disk diameters. T] ?QCf
Warning: The MTF results at one or more fields are inaccurate. L)_L#]Yy
The mapping between entrance pupil coordinates and exit pupil coordinates w]Ci%W(
is nonlinear. The nature of the nonlinearity is such that Code V is not ] dHV^!
able to compute an accurate MTF result. Usually, this condition is D?P 1\<A ~
caused by severe pupil distortion or some discontinuity in the pupil zqb3<WP"
coordinate mapping. In all cases where the pupil coordinate mapping -;t]e6[
has sufficient nonlinearity to cause this warning, the imagery is extremely 6E.64+P Jw
nonstationary (non-isoplanatic) and small changes in object space 5OX5\ #Ux
coordinates will cause large changes in the image of a point source. u/4|Akui
Error: The problem described here occurs at the following field(s): D4ud|$s1
Field: 1 3o^ oq
Field: 2 sme!!+Rd
Field: 3 OEs! H]v
Field: 4 q}%;O
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ERROR - For field 4, wavelength 1, rays at the edge of the pupil QfsTUAfR
may be ignored. Check apertures and vignetting for consistency. D(Yq<%Q
这个究竟是什么问题呢？好像是和视场有关。求高人指点。
