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。 KE+y'j#C3
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： . \ *Z:
Warning: At least 3 focal positions are recommended for finding best focus XB-pOtVm
Warning: This system is not isoplanatic at field(s) 1, 2, 3, 4. kIV /o
Any MTF results are of questionable value for assessing 12aAO|]/~
the image quality, except in those cases where the user is Zr_{Z@IpU
interested only in the image of a point-like object. The 2f>lgZ!
image quality for the unacceptable fields varies significan- gEtD qq~y@
tly over a lateral region of 12 Airy disk diameters. Xd>4n7nb$`
Warning: The MTF results at one or more fields are inaccurate. o(w1!spA
The mapping between entrance pupil coordinates and exit pupil coordinates 3uCC _Am
is nonlinear. The nature of the nonlinearity is such that Code V is not } `4o +
able to compute an accurate MTF result. Usually, this condition is 4_ J*
0=U
caused by severe pupil distortion or some discontinuity in the pupil _d&zH lc_
coordinate mapping. In all cases where the pupil coordinate mapping Gd`qZqx#
has sufficient nonlinearity to cause this warning, the imagery is extremely A5tY4?|
nonstationary (non-isoplanatic) and small changes in object space Deq~"
coordinates will cause large changes in the image of a point source. ZVJbpn<lo)
Error: The problem described here occurs at the following field(s): _CP e
Field: 1 3@ ?#4]D{'
Field: 2 X3I\O,"I
Field: 3 D {h1 "q
Field: 4 zTBr<:
ERROR - For field 4, wavelength 1, rays at the edge of the pupil x`w
4LF
may be ignored. Check apertures and vignetting for consistency. [[QrGJr
这个究竟是什么问题呢？好像是和视场有关。求高人指点。
