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。 zK /f$}
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： |%3O) B
Warning: At least 3 focal positions are recommended for finding best focus >~>{;Wq(p+
Warning: This system is not isoplanatic at field(s) 1, 2, 3, 4. 9M0d+:YJ
Any MTF results are of questionable value for assessing xrX? ZJ
the image quality, except in those cases where the user is /9TL&_A-T
interested only in the image of a point-like object. The IKtiR8
image quality for the unacceptable fields varies significan- &V FjH W
tly over a lateral region of 12 Airy disk diameters. xtu]F
Warning: The MTF results at one or more fields are inaccurate. (-#rF O5~l
The mapping between entrance pupil coordinates and exit pupil coordinates B{N=0 cSi
is nonlinear. The nature of the nonlinearity is such that Code V is not wC(XRql E
able to compute an accurate MTF result. Usually, this condition is cC' ^T6
caused by severe pupil distortion or some discontinuity in the pupil ?bn;{c;E
coordinate mapping. In all cases where the pupil coordinate mapping p( HyRCH
has sufficient nonlinearity to cause this warning, the imagery is extremely kYmo7
nonstationary (non-isoplanatic) and small changes in object space ,Os7T 1 >
coordinates will cause large changes in the image of a point source. `J]<_0kX}%
Error: The problem described here occurs at the following field(s): t{[gK V-b
Field: 1 wi dI
s[
)
Field: 2 T:dX4=z
Field: 3 0K`ZX&K?W
Field: 4 Y]M^n&f
ERROR - For field 4, wavelength 1, rays at the edge of the pupil i)GeX:
may be ignored. Check apertures and vignetting for consistency. p5D5%B/
这个究竟是什么问题呢？好像是和视场有关。求高人指点。
