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。 mOE *[S)
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：
po*G`b;v
Warning: At least 3 focal positions are recommended for finding best focus /v R>.'
Warning: This system is not isoplanatic at field(s) 1, 2, 3, 4. 75^6?#GS
Any MTF results are of questionable value for assessing A'|!O:s
the image quality, except in those cases where the user is Lzq/^&sc(
interested only in the image of a point-like object. The ^dQ{vL@9b9
image quality for the unacceptable fields varies significan- 4V,.Oi
tly over a lateral region of 12 Airy disk diameters. .Nn11F< d
Warning: The MTF results at one or more fields are inaccurate. Q z~uD'Rs/
The mapping between entrance pupil coordinates and exit pupil coordinates YFO{i -*q
is nonlinear. The nature of the nonlinearity is such that Code V is not ^|Q]WHNFB
able to compute an accurate MTF result. Usually, this condition is }E
'r?N
caused by severe pupil distortion or some discontinuity in the pupil ~G!JqdKJ0
coordinate mapping. In all cases where the pupil coordinate mapping >@YefNX6
has sufficient nonlinearity to cause this warning, the imagery is extremely _;1{feR_
nonstationary (non-isoplanatic) and small changes in object space ,;)ZF
coordinates will cause large changes in the image of a point source. 7>E.0 D P
Error: The problem described here occurs at the following field(s): "z~ba>,-\
Field: 1 ?%,NOX
Field: 2 *M.xVUPr
Field: 3 V 0nQmsP1U
Field: 4 \|;\
ERROR - For field 4, wavelength 1, rays at the edge of the pupil >fPo_@O
may be ignored. Check apertures and vignetting for consistency. $83B10OQ&L
这个究竟是什么问题呢？好像是和视场有关。求高人指点。
