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。 M@gm.)d
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： Y)!5Z.K
Warning: At least 3 focal positions are recommended for finding best focus #cmj?y()
Warning: This system is not isoplanatic at field(s) 1, 2, 3, 4. ^c!Hur6)
Any MTF results are of questionable value for assessing ey Cg *
the image quality, except in those cases where the user is 3 -Ti'xM
interested only in the image of a point-like object. The U~T/f-CT
image quality for the unacceptable fields varies significan- f -23.]`v
tly over a lateral region of 12 Airy disk diameters. Qb SX'mx<
Warning: The MTF results at one or more fields are inaccurate. + 1cK (Si
The mapping between entrance pupil coordinates and exit pupil coordinates Tlf G"HzZ%
is nonlinear. The nature of the nonlinearity is such that Code V is not W{0<ro`
able to compute an accurate MTF result. Usually, this condition is $MP'j9 -S?
caused by severe pupil distortion or some discontinuity in the pupil 4K4?Q+?
coordinate mapping. In all cases where the pupil coordinate mapping +:^ tppg
has sufficient nonlinearity to cause this warning, the imagery is extremely !J+5l&
nonstationary (non-isoplanatic) and small changes in object space jt;,7Ek
coordinates will cause large changes in the image of a point source. 9cj:'KG)!
Error: The problem described here occurs at the following field(s): un..UU4
Field: 1 IJs` 3 ?
Field: 2 hsVWD,w
Field: 3 Bh@j6fv
Field: 4 m+V'*[O{
ERROR - For field 4, wavelength 1, rays at the edge of the pupil 0P!6
.-XU
may be ignored. Check apertures and vignetting for consistency. 0h#' 3z<
这个究竟是什么问题呢？好像是和视场有关。求高人指点。
