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。 l)G^cSHF.3
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： 0H6(EzN
Warning: At least 3 focal positions are recommended for finding best focus ^ 8 z R
Warning: This system is not isoplanatic at field(s) 1, 2, 3, 4. xQ}pu2@d
Any MTF results are of questionable value for assessing X &uTSgN
the image quality, except in those cases where the user is )m`<H>[Eb=
interested only in the image of a point-like object. The U &C!}
image quality for the unacceptable fields varies significan- ( }{G`N>.{
tly over a lateral region of 12 Airy disk diameters. 2/vMoVT,
Warning: The MTF results at one or more fields are inaccurate. f[@77m*
The mapping between entrance pupil coordinates and exit pupil coordinates x.7]/ )
is nonlinear. The nature of the nonlinearity is such that Code V is not _wTOmz%|R
able to compute an accurate MTF result. Usually, this condition is 5Sm}n H
caused by severe pupil distortion or some discontinuity in the pupil &ib5* 4!
coordinate mapping. In all cases where the pupil coordinate mapping g<l1zo`_
has sufficient nonlinearity to cause this warning, the imagery is extremely GG Nvu )"
nonstationary (non-isoplanatic) and small changes in object space ^A!Qc=#z}
coordinates will cause large changes in the image of a point source. I9/W;#
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Error: The problem described here occurs at the following field(s): d YT%
Field: 1 9KDEM gCW
Field: 2 d: #yEC
Field: 3 G0/4JSH
Field: 4 N*"p|yhd]
ERROR - For field 4, wavelength 1, rays at the edge of the pupil 2Z -ljD&
may be ignored. Check apertures and vignetting for consistency. uD}2<$PP
这个究竟是什么问题呢？好像是和视场有关。求高人指点。
