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。 k\dPF@~Hvl
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： 23,p Vo
Warning: At least 3 focal positions are recommended for finding best focus wf\7sz
Warning: This system is not isoplanatic at field(s) 1, 2, 3, 4. 8K8jz9.s
Any MTF results are of questionable value for assessing WB<MU:.Vc
the image quality, except in those cases where the user is FgrVXb_q
interested only in the image of a point-like object. The )~ &gBX
image quality for the unacceptable fields varies significan- {X_I>)Wg
tly over a lateral region of 12 Airy disk diameters. fBz|-I:k
+
Warning: The MTF results at one or more fields are inaccurate. :q j;f];|
The mapping between entrance pupil coordinates and exit pupil coordinates ?_p!teb
is nonlinear. The nature of the nonlinearity is such that Code V is not H5
:,hrZY
able to compute an accurate MTF result. Usually, this condition is Zg>]!^X8
caused by severe pupil distortion or some discontinuity in the pupil 2m*/$GZ
coordinate mapping. In all cases where the pupil coordinate mapping Z5*(xo ny0
has sufficient nonlinearity to cause this warning, the imagery is extremely *
{~`Lw)y
nonstationary (non-isoplanatic) and small changes in object space G K3T w
coordinates will cause large changes in the image of a point source. /eXiWa sQ
Error: The problem described here occurs at the following field(s): `R7d n/
Field: 1 )54a' Hp
Field: 2 )`ixT)
Field: 3 X%N !gy
Field: 4 0w< i lJ
ERROR - For field 4, wavelength 1, rays at the edge of the pupil CF\wR;6k
may be ignored. Check apertures and vignetting for consistency. 
