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。 x
kdC -S
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： -!
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Warning: At least 3 focal positions are recommended for finding best focus -s]@8VJA"
Warning: This system is not isoplanatic at field(s) 1, 2, 3, 4. R$;TX^r'o&
Any MTF results are of questionable value for assessing * NC@o*
the image quality, except in those cases where the user is "egpc*|]
interested only in the image of a point-like object. The \} _, g
image quality for the unacceptable fields varies significan- %Rk DR
tly over a lateral region of 12 Airy disk diameters. Nt/hF>"7
Warning: The MTF results at one or more fields are inaccurate. ; RYIc0%
The mapping between entrance pupil coordinates and exit pupil coordinates B lqISyrY
is nonlinear. The nature of the nonlinearity is such that Code V is not w1 eFm:'
able to compute an accurate MTF result. Usually, this condition is ~ 7<M6F
caused by severe pupil distortion or some discontinuity in the pupil ilAhw4 A
coordinate mapping. In all cases where the pupil coordinate mapping Zn[ppsz|
has sufficient nonlinearity to cause this warning, the imagery is extremely .br6x ^\<
nonstationary (non-isoplanatic) and small changes in object space M{4XNE]m
coordinates will cause large changes in the image of a point source. iUk#hLLC
Error: The problem described here occurs at the following field(s): A WJA?
Field: 1 x_r*<?OZ
Field: 2 n]i#&[*A(
Field: 3 [2E( 3`-u
Field: 4 n#@ Qd!uzM
ERROR - For field 4, wavelength 1, rays at the edge of the pupil m"QDc[^Ge
may be ignored. Check apertures and vignetting for consistency. n~.$ iN
这个究竟是什么问题呢？好像是和视场有关。求高人指点。
