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。 ];bB7+
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： +*-u_L\'
Warning: At least 3 focal positions are recommended for finding best focus g(m 3
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Warning: This system is not isoplanatic at field(s) 1, 2, 3, 4. v{9< ATi
Any MTF results are of questionable value for assessing XmN3[j
the image quality, except in those cases where the user is AU@K5jwDwQ
interested only in the image of a point-like object. The v`8dRVN
image quality for the unacceptable fields varies significan- GW a_^
tly over a lateral region of 12 Airy disk diameters. kK+ <n8R2
Warning: The MTF results at one or more fields are inaccurate. f;M7y:A8q,
The mapping between entrance pupil coordinates and exit pupil coordinates }.w@.
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is nonlinear. The nature of the nonlinearity is such that Code V is not r
J'm>&Ps
able to compute an accurate MTF result. Usually, this condition is ;i|V++$_
caused by severe pupil distortion or some discontinuity in the pupil ilL] pU-
coordinate mapping. In all cases where the pupil coordinate mapping F<y $Q0Z}
has sufficient nonlinearity to cause this warning, the imagery is extremely n)$T
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nonstationary (non-isoplanatic) and small changes in object space D/C,Q|Ya6
coordinates will cause large changes in the image of a point source. >e n,MT|
Error: The problem described here occurs at the following field(s): /=co/}i
Field: 1 Wi ]Mp7b
Field: 2 z;`o>Ja2
Field: 3 v~i/e+.h>y
Field: 4 xv;'27mUt
ERROR - For field 4, wavelength 1, rays at the edge of the pupil EJ&[I%jU
may be ignored. Check apertures and vignetting for consistency. n |5+HE4@
这个究竟是什么问题呢？好像是和视场有关。求高人指点。
