| 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。 !*N@ZL& 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： FcU SE
Warning: At least 3 focal positions are recommended for finding best focus r`d4e,(
Warning: This system is not isoplanatic at field(s) 1, 2, 3, 4. 8OU\V5i[,q
Any MTF results are of questionable value for assessing FT Uv IbT
the image quality, except in those cases where the user is kn 4`Fa;)O
interested only in the image of a point-like object. The !l8PDjAE
image quality for the unacceptable fields varies significan- .M %}X7
tly over a lateral region of 12 Airy disk diameters. '-~~-}= sJ
Warning: The MTF results at one or more fields are inaccurate. ,#9PxwrO
The mapping between entrance pupil coordinates and exit pupil coordinates (hbyEQhF
is nonlinear. The nature of the nonlinearity is such that Code V is not S4z;7z(8+
able to compute an accurate MTF result. Usually, this condition is yvB. &<]No
caused by severe pupil distortion or some discontinuity in the pupil 3 F2w-+L
coordinate mapping. In all cases where the pupil coordinate mapping bWU' cw
has sufficient nonlinearity to cause this warning, the imagery is extremely tT_\ i6My
nonstationary (non-isoplanatic) and small changes in object space \_f(M|
coordinates will cause large changes in the image of a point source.
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Error: The problem described here occurs at the following field(s): ) 3EY;
Field: 1 hz@bW2S.
Field: 2 !Wnb|=j
Field: 3 9rf)gU3{+L
Field: 4 >|UOz&
ERROR - For field 4, wavelength 1, rays at the edge of the pupil S.NPZ39}ZE
may be ignored. Check apertures and vignetting for consistency. }K|oicpUg
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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