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。 qw_qGgbl
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： gNZ^TeT
Warning: At least 3 focal positions are recommended for finding best focus i
[j`'.fj
Warning: This system is not isoplanatic at field(s) 1, 2, 3, 4. &"^A
Any MTF results are of questionable value for assessing u\t ;
the image quality, except in those cases where the user is b0KorUr
interested only in the image of a point-like object. The X.272q<.
image quality for the unacceptable fields varies significan- /H3,v8J@
tly over a lateral region of 12 Airy disk diameters. /n"A%6S
Warning: The MTF results at one or more fields are inaccurate. IndNR:"g
The mapping between entrance pupil coordinates and exit pupil coordinates $6'xRUx X
is nonlinear. The nature of the nonlinearity is such that Code V is not .R-:vU880
able to compute an accurate MTF result. Usually, this condition is =,0E3:X^
caused by severe pupil distortion or some discontinuity in the pupil ^kXDEKm
coordinate mapping. In all cases where the pupil coordinate mapping <& +l;z
has sufficient nonlinearity to cause this warning, the imagery is extremely OEAF.
nonstationary (non-isoplanatic) and small changes in object space vys*=48g
coordinates will cause large changes in the image of a point source. nh E!Pk
Error: The problem described here occurs at the following field(s): ]AHi $Xx
Field: 1 - z|idy{
Field: 2 -k<.Q=]<t
Field: 3 @pG\5 Jnf
Field: 4 N?pD"re)6
ERROR - For field 4, wavelength 1, rays at the edge of the pupil gE$dz#t.
may be ignored. Check apertures and vignetting for consistency. B8TI 5mZ4
这个究竟是什么问题呢？好像是和视场有关。求高人指点。
