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。 wE_#b\$=b
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： (M%ZSF V
Warning: At least 3 focal positions are recommended for finding best focus u~27\oj,
Warning: This system is not isoplanatic at field(s) 1, 2, 3, 4. $P Tl{
Any MTF results are of questionable value for assessing pbqJtBBDDS
the image quality, except in those cases where the user is UujKgL4
interested only in the image of a point-like object. The n Ayyjd3!S
image quality for the unacceptable fields varies significan- +4K'KpFzZ
tly over a lateral region of 12 Airy disk diameters. Y^ ,G}
&p
Warning: The MTF results at one or more fields are inaccurate. TzsNhrU{
The mapping between entrance pupil coordinates and exit pupil coordinates xQ8?"K;iX
is nonlinear. The nature of the nonlinearity is such that Code V is not n^rzl6dy
able to compute an accurate MTF result. Usually, this condition is 1!2,K ot
caused by severe pupil distortion or some discontinuity in the pupil $9< P3J 1
coordinate mapping. In all cases where the pupil coordinate mapping 7XiR)jYo*
has sufficient nonlinearity to cause this warning, the imagery is extremely wU5= '
nonstationary (non-isoplanatic) and small changes in object space u]t#V f-$u
coordinates will cause large changes in the image of a point source. ;5=5HYx%
Error: The problem described here occurs at the following field(s): :4S~} }N
Field: 1 WO{9S%ck
Field: 2 50`<[w<J
q
Field: 3 3d>xg%?
Field: 4 $:*/^)L
ERROR - For field 4, wavelength 1, rays at the edge of the pupil \@*D;-b
may be ignored. Check apertures and vignetting for consistency.
19^B610
这个究竟是什么问题呢？好像是和视场有关。求高人指点。
