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。 (~CLn;'
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： J;_}lF9d@
Warning: At least 3 focal positions are recommended for finding best focus *n" /a{6>
Warning: This system is not isoplanatic at field(s) 1, 2, 3, 4. \$0F-=w`8
Any MTF results are of questionable value for assessing {!6/x9>
the image quality, except in those cases where the user is JD@J[YY5R
interested only in the image of a point-like object. The \drqG&wl
image quality for the unacceptable fields varies significan- eP*lI< NQ1
tly over a lateral region of 12 Airy disk diameters. p' M%XBu
Warning: The MTF results at one or more fields are inaccurate. d
;vT ~;
The mapping between entrance pupil coordinates and exit pupil coordinates W;bu2ym&Q
is nonlinear. The nature of the nonlinearity is such that Code V is not bM 8If"
able to compute an accurate MTF result. Usually, this condition is m_?d=o
caused by severe pupil distortion or some discontinuity in the pupil _ZY)M
coordinate mapping. In all cases where the pupil coordinate mapping :RoBl3X=
has sufficient nonlinearity to cause this warning, the imagery is extremely "Rn 3lj0
nonstationary (non-isoplanatic) and small changes in object space ono4U.C9
coordinates will cause large changes in the image of a point source. ^Wxad?@
Error: The problem described here occurs at the following field(s): Ee`1F#c
Field: 1 PV|uPuz
Field: 2 q _-7i
Field: 3 X[f=h= |
Field: 4 O@p]KSfk
ERROR - For field 4, wavelength 1, rays at the edge of the pupil /|xra8?H[
may be ignored. Check apertures and vignetting for consistency. 0-~\
W(
这个究竟是什么问题呢？好像是和视场有关。求高人指点。
