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。 W-!Bl&jF[
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： nK h%E-c
Warning: At least 3 focal positions are recommended for finding best focus V4eng "
Warning: This system is not isoplanatic at field(s) 1, 2, 3, 4. j[/S XF\=
Any MTF results are of questionable value for assessing w38c
the image quality, except in those cases where the user is `$V[;ld(mz
interested only in the image of a point-like object. The RZ|HwYG
image quality for the unacceptable fields varies significan- wyrI8UY
tly over a lateral region of 12 Airy disk diameters. xZP >g
Warning: The MTF results at one or more fields are inaccurate. <p^*Ydx
The mapping between entrance pupil coordinates and exit pupil coordinates c
BHL,
is nonlinear. The nature of the nonlinearity is such that Code V is not
'9 * |N=
able to compute an accurate MTF result. Usually, this condition is mS:j$$]u
caused by severe pupil distortion or some discontinuity in the pupil c8-69hb?
coordinate mapping. In all cases where the pupil coordinate mapping Im?= e
has sufficient nonlinearity to cause this warning, the imagery is extremely "y~muE:.
nonstationary (non-isoplanatic) and small changes in object space U1>
coordinates will cause large changes in the image of a point source. V5u}C-o
Error: The problem described here occurs at the following field(s): 5%QC
][,
Field: 1 @L[PW@:SZ
Field: 2 hY.e [+
Field: 3 {UdcX~\~
Field: 4 ']IT uP8
ERROR - For field 4, wavelength 1, rays at the edge of the pupil !dyxE'T2
may be ignored. Check apertures and vignetting for consistency. t +3
这个究竟是什么问题呢？好像是和视场有关。求高人指点。
