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。 > &Lu0 oHH
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： vu >@_ hv
Warning: At least 3 focal positions are recommended for finding best focus !`E 2O*g
Warning: This system is not isoplanatic at field(s) 1, 2, 3, 4. A1T;9`E
Any MTF results are of questionable value for assessing vG:,oB}
the image quality, except in those cases where the user is scwlW
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interested only in the image of a point-like object. The
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image quality for the unacceptable fields varies significan- s5#g [}dj
tly over a lateral region of 12 Airy disk diameters. :Xr3 3
Warning: The MTF results at one or more fields are inaccurate. -bQvJ`iF
The mapping between entrance pupil coordinates and exit pupil coordinates rVmO/Y#Hx$
is nonlinear. The nature of the nonlinearity is such that Code V is not (I
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able to compute an accurate MTF result. Usually, this condition is h0}-1kVT^
caused by severe pupil distortion or some discontinuity in the pupil 7@]hu^)rry
coordinate mapping. In all cases where the pupil coordinate mapping ^E*C~;^S
has sufficient nonlinearity to cause this warning, the imagery is extremely ]2
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nonstationary (non-isoplanatic) and small changes in object space 40/[ u W"
coordinates will cause large changes in the image of a point source. Yb/^Qk59
Error: The problem described here occurs at the following field(s): ^S$w,
Field: 1 v9k zMxs,
Field: 2 ]TN}` ]
Field: 3 ^r$5];n
Field: 4 "<b84?V5
ERROR - For field 4, wavelength 1, rays at the edge of the pupil Gl9 a5b
may be ignored. Check apertures and vignetting for consistency. aW5 ~z^I
这个究竟是什么问题呢？好像是和视场有关。求高人指点。
