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。 < c4RmnA
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： RAkFgC~
Warning: At least 3 focal positions are recommended for finding best focus {II7%\ya
Warning: This system is not isoplanatic at field(s) 1, 2, 3, 4. '[d dE!ta
Any MTF results are of questionable value for assessing SO jDtZ
the image quality, except in those cases where the user is }_D5, k
interested only in the image of a point-like object. The F~- S3p
image quality for the unacceptable fields varies significan- J?=Ob?+
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tly over a lateral region of 12 Airy disk diameters. jKi * 3-&
Warning: The MTF results at one or more fields are inaccurate. Pc-8L]2oaF
The mapping between entrance pupil coordinates and exit pupil coordinates 9+;f1nV
is nonlinear. The nature of the nonlinearity is such that Code V is not ( Vv[
able to compute an accurate MTF result. Usually, this condition is E*b[.vUp
caused by severe pupil distortion or some discontinuity in the pupil #$z -]i
coordinate mapping. In all cases where the pupil coordinate mapping o>,z %+
has sufficient nonlinearity to cause this warning, the imagery is extremely ,/?V+3l
nonstationary (non-isoplanatic) and small changes in object space KD3To%
coordinates will cause large changes in the image of a point source. %a6]gsiv2<
Error: The problem described here occurs at the following field(s): +(k)1kCMn
Field: 1 s&_O2(l
Field: 2 tMk>Bx9[
Field: 3 Da[X
HUk
Field: 4 PY:#F|uHS`
ERROR - For field 4, wavelength 1, rays at the edge of the pupil =}o>_+"
may be ignored. Check apertures and vignetting for consistency. XGl13@=O
这个究竟是什么问题呢？好像是和视场有关。求高人指点。
