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。 OyFBM>6gh
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： ~E#>2Mh
Warning: At least 3 focal positions are recommended for finding best focus 5,;{< \c
Warning: This system is not isoplanatic at field(s) 1, 2, 3, 4. HuCH`|v-
Any MTF results are of questionable value for assessing .-fJ\`^mi
the image quality, except in those cases where the user is ;PGC9v%i
interested only in the image of a point-like object. The ^uC1\!Q1
image quality for the unacceptable fields varies significan- m?bb/o'B
tly over a lateral region of 12 Airy disk diameters. j[9xF<I
Warning: The MTF results at one or more fields are inaccurate. 5"k _Ms7R,
The mapping between entrance pupil coordinates and exit pupil coordinates OP%h`
is nonlinear. The nature of the nonlinearity is such that Code V is not ME { i-E4
able to compute an accurate MTF result. Usually, this condition is pT:Cv J
caused by severe pupil distortion or some discontinuity in the pupil X 1^f0\k
coordinate mapping. In all cases where the pupil coordinate mapping , )u}8ty3j
has sufficient nonlinearity to cause this warning, the imagery is extremely PUF"^9v
nonstationary (non-isoplanatic) and small changes in object space 5c`DkWne%
coordinates will cause large changes in the image of a point source. ,NPU0IDG>
Error: The problem described here occurs at the following field(s): zZGPA j
Field: 1 @D Qg1| m
Field: 2 vNHM e{,u
Field: 3 AZxOq !B
Field: 4 I
Yj\t?,0
ERROR - For field 4, wavelength 1, rays at the edge of the pupil _ i.CvYe
may be ignored. Check apertures and vignetting for consistency. t&eY+3y,T
这个究竟是什么问题呢？好像是和视场有关。求高人指点。
