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。 \cM2k-
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: gI|~|-'
Warning: At least 3 focal positions are recommended for finding best focus -yNlyHv9
Warning: This system is not isoplanatic at field(s) 1, 2, 3, 4. %mgE;~"&
Any MTF results are of questionable value for assessing YtLt*Ig%
the image quality, except in those cases where the user is m+$VVn3Z}
interested only in the image of a point-like object. The
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image quality for the unacceptable fields varies significan- P[fq8lDA
tly over a lateral region of 12 Airy disk diameters. *|HY>U.
Warning: The MTF results at one or more fields are inaccurate. n~Lt\K:
The mapping between entrance pupil coordinates and exit pupil coordinates <IW$m!{VG
is nonlinear. The nature of the nonlinearity is such that Code V is not [dV L&k<P
able to compute an accurate MTF result. Usually, this condition is 7F.4Ga;
caused by severe pupil distortion or some discontinuity in the pupil ;722\y(Y
coordinate mapping. In all cases where the pupil coordinate mapping ZS o)
has sufficient nonlinearity to cause this warning, the imagery is extremely 7_[L o4_
nonstationary (non-isoplanatic) and small changes in object space `\ol,B_l
coordinates will cause large changes in the image of a point source. >/6 _ ^
Error: The problem described here occurs at the following field(s): dqcL]e
Field: 1 |JsZJ9W+J
Field: 2 GTxk%
Field: 3 %B?=q@!QWn
Field: 4 RT8 ?7xFc
ERROR - For field 4, wavelength 1, rays at the edge of the pupil ,<X9 Y2B
may be ignored. Check apertures and vignetting for consistency. 1k^oS$UT
这个究竟是什么问题呢?好像是和视场有关。求高人指点。