ljwcdtj |
2012-05-17 12:02 |
求CODEV中MTF图线不能显示的原因
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。 q~trn'X> 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: }(E6:h;}~ Warning: At least 3 focal positions are recommended for finding best focus {r&M Warning: This system is not isoplanatic at field(s) 1, 2, 3, 4. e%bERds Any MTF results are of questionable value for assessing [tMf KO the image quality, except in those cases where the user is ErESk"2t interested only in the image of a point-like object. The @+1E|4L1vf image quality for the unacceptable fields varies significan- 9 b]U&A$ tly over a lateral region of 12 Airy disk diameters. kTiQO2H Warning: The MTF results at one or more fields are inaccurate. xOT'4v&. The mapping between entrance pupil coordinates and exit pupil coordinates T|.Q81.NE is nonlinear. The nature of the nonlinearity is such that Code V is not 10#!{].#x able to compute an accurate MTF result. Usually, this condition is MVt#n\_BZV caused by severe pupil distortion or some discontinuity in the pupil A</[Q>8 coordinate mapping. In all cases where the pupil coordinate mapping &K>]!yn has sufficient nonlinearity to cause this warning, the imagery is extremely #-'}r}1ZT nonstationary (non-isoplanatic) and small changes in object space MP}H
5 coordinates will cause large changes in the image of a point source. sxThz7#i) Error: The problem described here occurs at the following field(s): -&)^|Atm Field: 1 m9G,%]4| Field: 2 sTG+c E Field: 3 "fpj"lf- Field: 4 ,xD{A}}V ERROR - For field 4, wavelength 1, rays at the edge of the pupil HAO/r`7* may be ignored. Check apertures and vignetting for consistency. p~8~EQFj 这个究竟是什么问题呢?好像是和视场有关。求高人指点。
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