| 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。 '^!1 A GF
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： V EuT!^0Z
Warning: At least 3 focal positions are recommended for finding best focus (}|QSf:
Warning: This system is not isoplanatic at field(s) 1, 2, 3, 4. }!W,/=z*
Any MTF results are of questionable value for assessing rerl-T<3
the image quality, except in those cases where the user is _,U`Iq+X
interested only in the image of a point-like object. The BM@:=>ypQ
image quality for the unacceptable fields varies significan- UZ`G S$D@
tly over a lateral region of 12 Airy disk diameters. xjplJ' jB
Warning: The MTF results at one or more fields are inaccurate. i s2OJ,
The mapping between entrance pupil coordinates and exit pupil coordinates ZE! dg^-L
is nonlinear. The nature of the nonlinearity is such that Code V is not T/A[C
able to compute an accurate MTF result. Usually, this condition is TCC([
caused by severe pupil distortion or some discontinuity in the pupil |Zn |?#F
coordinate mapping. In all cases where the pupil coordinate mapping xux
j
has sufficient nonlinearity to cause this warning, the imagery is extremely 3miEF0x[
nonstationary (non-isoplanatic) and small changes in object space \}:&Hl+
coordinates will cause large changes in the image of a point source. 4}4K6y<q
Error: The problem described here occurs at the following field(s): ?0{8fGM4
Field: 1 xw)$).yc
Field: 2 ^hpdre"
Field: 3 L ~,x~sLd
Field: 4 EqN_VT@
ERROR - For field 4, wavelength 1, rays at the edge of the pupil " -pQL )f
may be ignored. Check apertures and vignetting for consistency. w=]bj0<A=
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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