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。 - i"?2gK
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： )\fLS d
Warning: At least 3 focal positions are recommended for finding best focus 76 RFu@k
Warning: This system is not isoplanatic at field(s) 1, 2, 3, 4. //- ;uEO
Any MTF results are of questionable value for assessing yq\p %z$:
the image quality, except in those cases where the user is N&-J,p~
interested only in the image of a point-like object. The W3 2]#M=
image quality for the unacceptable fields varies significan- *waaM]u
tly over a lateral region of 12 Airy disk diameters. nY 50dFA,
Warning: The MTF results at one or more fields are inaccurate. ffoLCx4o0E
The mapping between entrance pupil coordinates and exit pupil coordinates 4{Af 3N
is nonlinear. The nature of the nonlinearity is such that Code V is not @hj5j;NHK
able to compute an accurate MTF result. Usually, this condition is :6y;U
caused by severe pupil distortion or some discontinuity in the pupil u% I |o s]
coordinate mapping. In all cases where the pupil coordinate mapping ,p[9EW* 8
has sufficient nonlinearity to cause this warning, the imagery is extremely FR? \H"'x
nonstationary (non-isoplanatic) and small changes in object space }J|Pd3Q Sf
coordinates will cause large changes in the image of a point source. ny pG
Error: The problem described here occurs at the following field(s): f,'9Bj. ~
Field: 1 |Y]4PT#EE
Field: 2 _!Ir|j.A
Field: 3 ?S~j2 J]
Field: 4 O#B2XoZa+
ERROR - For field 4, wavelength 1, rays at the edge of the pupil QK@[ b3-h1
may be ignored. Check apertures and vignetting for consistency. db0 ]D\
这个究竟是什么问题呢？好像是和视场有关。求高人指点。
