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。 <V-D
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： G/:;Qig
Warning: At least 3 focal positions are recommended for finding best focus rG _T!']~
Warning: This system is not isoplanatic at field(s) 1, 2, 3, 4. <TL!iM
Any MTF results are of questionable value for assessing \/Z?QBFvz
the image quality, except in those cases where the user is n:-:LSa+3
interested only in the image of a point-like object. The I'M,p <B
image quality for the unacceptable fields varies significan- #R<ErX)F
tly over a lateral region of 12 Airy disk diameters. 4]F:QS%
x
Warning: The MTF results at one or more fields are inaccurate. Wu\{)g{&
The mapping between entrance pupil coordinates and exit pupil coordinates #3l&N4 /
is nonlinear. The nature of the nonlinearity is such that Code V is not i1"4z tZ
able to compute an accurate MTF result. Usually, this condition is A3VXh^y+
caused by severe pupil distortion or some discontinuity in the pupil Hvto]~=GQ
coordinate mapping. In all cases where the pupil coordinate mapping 1/O7K R`K
has sufficient nonlinearity to cause this warning, the imagery is extremely 2aef[TY
nonstationary (non-isoplanatic) and small changes in object space gi|j ! m
coordinates will cause large changes in the image of a point source. brk>oM;t
Error: The problem described here occurs at the following field(s): MY]Z@
Field: 1 df=G}M(
Field: 2 x4&<Vr
Field: 3 xU4,R cgo
Field: 4 '$@bTW
ERROR - For field 4, wavelength 1, rays at the edge of the pupil Q{ibH=^
may be ignored. Check apertures and vignetting for consistency. WQ(*A
$
这个究竟是什么问题呢？好像是和视场有关。求高人指点。
