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。 *+\SyO
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: >layJt
Warning: At least 3 focal positions are recommended for finding best focus MH{GR)ng:9
Warning: This system is not isoplanatic at field(s) 1, 2, 3, 4. \uXcLhXN
Any MTF results are of questionable value for assessing Wt=|
the image quality, except in those cases where the user is g q}I[N
interested only in the image of a point-like object. The >j'ZPwj^
image quality for the unacceptable fields varies significan- )QG<f{wS
tly over a lateral region of 12 Airy disk diameters. }yJ$SR]t
Warning: The MTF results at one or more fields are inaccurate. V\{tmDE
The mapping between entrance pupil coordinates and exit pupil coordinates w^#L9i'v'
is nonlinear. The nature of the nonlinearity is such that Code V is not |6(ZD^w
able to compute an accurate MTF result. Usually, this condition is Fb4`|
caused by severe pupil distortion or some discontinuity in the pupil }t;(VynV)
coordinate mapping. In all cases where the pupil coordinate mapping `8I&7c
has sufficient nonlinearity to cause this warning, the imagery is extremely ~,BIf+\XF
nonstationary (non-isoplanatic) and small changes in object space kf;/c}}
coordinates will cause large changes in the image of a point source. :LQ5u[g$\
Error: The problem described here occurs at the following field(s): e+j)~RBnu3
Field: 1 '/$d0`3B>
Field: 2 <]T` 3W9
Field: 3 \igmv]G%
Field: 4 VB?Ohk]<
ERROR - For field 4, wavelength 1, rays at the edge of the pupil r.T<j.\
may be ignored. Check apertures and vignetting for consistency. l6~-8d+lfN
这个究竟是什么问题呢?好像是和视场有关。求高人指点。