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。 UOFb.FRP>
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： 5'NN wc\
Warning: At least 3 focal positions are recommended for finding best focus ii_k gqT^
Warning: This system is not isoplanatic at field(s) 1, 2, 3, 4. "AZ|u#0P
Any MTF results are of questionable value for assessing "{r8'qn
the image quality, except in those cases where the user is !(7m/R
interested only in the image of a point-like object. The tewp-M KA
image quality for the unacceptable fields varies significan- g5y`XFY
tly over a lateral region of 12 Airy disk diameters. aoZ | @x
Warning: The MTF results at one or more fields are inaccurate. :{N*Z }]
The mapping between entrance pupil coordinates and exit pupil coordinates &ocuZ -5`
is nonlinear. The nature of the nonlinearity is such that Code V is not umWs8-'Uw
able to compute an accurate MTF result. Usually, this condition is ?)J/uU2w
caused by severe pupil distortion or some discontinuity in the pupil .hu7J M+
coordinate mapping. In all cases where the pupil coordinate mapping U+*l!"O ,
has sufficient nonlinearity to cause this warning, the imagery is extremely t VO}{[U}
nonstationary (non-isoplanatic) and small changes in object space =y-yHRC7
coordinates will cause large changes in the image of a point source. O- HS)g$2
Error: The problem described here occurs at the following field(s): \#(1IC`as
Field: 1 r :$tvT*
Field: 2 qF4tjza;k
Field: 3 (_|*&au J
Field: 4 ]7 Du/)$
ERROR - For field 4, wavelength 1, rays at the edge of the pupil C{}PO u
may be ignored. Check apertures and vignetting for consistency. iMJt8sd
这个究竟是什么问题呢？好像是和视场有关。求高人指点。
