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。 RMlx[n sq
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： BHt9$$Z|
Warning: At least 3 focal positions are recommended for finding best focus Y'yGhpT~
Warning: This system is not isoplanatic at field(s) 1, 2, 3, 4. @ T%8EiV
Any MTF results are of questionable value for assessing <Aqo[']
the image quality, except in those cases where the user is Bdm05}c@u
interested only in the image of a point-like object. The ]h'*L`
image quality for the unacceptable fields varies significan- X*t2h3 "}
tly over a lateral region of 12 Airy disk diameters. mD7kOOMY
Warning: The MTF results at one or more fields are inaccurate. ,L\>mGw
The mapping between entrance pupil coordinates and exit pupil coordinates t'[`"pp=
is nonlinear. The nature of the nonlinearity is such that Code V is not }p KKNZ `[
able to compute an accurate MTF result. Usually, this condition is BBa!l e9P
caused by severe pupil distortion or some discontinuity in the pupil d "25e"(~F
coordinate mapping. In all cases where the pupil coordinate mapping AbIYdFX B
has sufficient nonlinearity to cause this warning, the imagery is extremely KM/c^ a4V
nonstationary (non-isoplanatic) and small changes in object space HjY! ]!4p
coordinates will cause large changes in the image of a point source. 9JJk\,
Error: The problem described here occurs at the following field(s): 9\>{1"a
Field: 1 VjJ}q*/3e
Field: 2 EzU3'x
Field: 3 )!Zm*(
Field: 4 -'T^gEd) c
ERROR - For field 4, wavelength 1, rays at the edge of the pupil Z6#(83G4
may be ignored. Check apertures and vignetting for consistency. a1z*Z/!5
这个究竟是什么问题呢？好像是和视场有关。求高人指点。
