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。 ^OHZ767v
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： &(lMm )
Warning: At least 3 focal positions are recommended for finding best focus ~&lQNl3`m6
Warning: This system is not isoplanatic at field(s) 1, 2, 3, 4. k%"$$uo
Any MTF results are of questionable value for assessing 6o$Z0mG
the image quality, except in those cases where the user is %0NL Rfp
interested only in the image of a point-like object. The F?!FD>L{`
image quality for the unacceptable fields varies significan- S|l&fb n
tly over a lateral region of 12 Airy disk diameters. YavfjS:2
Warning: The MTF results at one or more fields are inaccurate. j1'\R+ 4U
The mapping between entrance pupil coordinates and exit pupil coordinates 8r5xs-
is nonlinear. The nature of the nonlinearity is such that Code V is not kBrvl^D{5
able to compute an accurate MTF result. Usually, this condition is kJ/+IGV^v
caused by severe pupil distortion or some discontinuity in the pupil # N; $
coordinate mapping. In all cases where the pupil coordinate mapping .=?Sz*3
has sufficient nonlinearity to cause this warning, the imagery is extremely 4+)Z k$E
nonstationary (non-isoplanatic) and small changes in object space <MRC%!.
coordinates will cause large changes in the image of a point source. bAUHUPe
Error: The problem described here occurs at the following field(s): %wOOzp`
Field: 1 ,xYg
Field: 2 #g,H("Qy({
Field: 3 x<8\-
Field: 4 X>2?
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ERROR - For field 4, wavelength 1, rays at the edge of the pupil 3QH(4N
may be ignored. Check apertures and vignetting for consistency. 3)dP7rmZ
这个究竟是什么问题呢？好像是和视场有关。求高人指点。
