| 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。 +,4u1 `c|$
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： s)kr=zdyo
Warning: At least 3 focal positions are recommended for finding best focus %? O$xQ.<
Warning: This system is not isoplanatic at field(s) 1, 2, 3, 4. , Y0qGsV
Any MTF results are of questionable value for assessing zi+NQOhR
the image quality, except in those cases where the user is G ,@ Jo[e
interested only in the image of a point-like object. The
VO,F[E~_
image quality for the unacceptable fields varies significan- =n_>7@9l
tly over a lateral region of 12 Airy disk diameters. Rw`64 L_
Warning: The MTF results at one or more fields are inaccurate. di~ [Ivw
The mapping between entrance pupil coordinates and exit pupil coordinates )H*BTfmt
is nonlinear. The nature of the nonlinearity is such that Code V is not e,@5`aYHM@
able to compute an accurate MTF result. Usually, this condition is 3s,a%GO k
caused by severe pupil distortion or some discontinuity in the pupil j =PM]
coordinate mapping. In all cases where the pupil coordinate mapping jG/@kh*m
has sufficient nonlinearity to cause this warning, the imagery is extremely eeOG(@@o(
nonstationary (non-isoplanatic) and small changes in object space r]bG,?|
coordinates will cause large changes in the image of a point source. 7n'Ww=ttI
Error: The problem described here occurs at the following field(s): ?#/~ BZR!
Field: 1 _j\ 8u`^n
Field: 2 7k#0EhN 1>
Field: 3 ##yH*{/&
Field: 4 3 E!F8GZ
ERROR - For field 4, wavelength 1, rays at the edge of the pupil ,egbU (:l
may be ignored. Check apertures and vignetting for consistency. 3\a VZx!
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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